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1

Variable Frequency Drives: Energy Savings and Impact on Motor Performance  

E-Print Network [OSTI]

Variable frequency drives (VFDs) have found widespread application in recent years. VFDs are valued for their potential to save energy and improve processes. Reliability has improved significantly, but there are still pitfalls to be addressed...

Petro, D.

2

An AChBKr315M2BU3 induction variable-frequency electric motor with a squirrel-cage rotor  

Science Journals Connector (OSTI)

Information about a variable-frequency electric motor designed and manufactured by OAO NIPTIEM is presented. The motor is intended for use as a starter motor for the GTU-8 gas turbine power...

M. F. Zapadnya; O. V. Martynov; S. V. PiskunovÖ

2007-06-01T23:59:59.000Z

3

A review on sensorless techniques for sustainable reliablity and efficient variable frequency drives of induction motors  

Science Journals Connector (OSTI)

Abstract Variable frequency drives (VFDs) can provide reliable dynamic systems and significant savings in energy usage and costs of the induction motors (IMs). Sensorless controlled IM drives have advantages in terms of efficiency enhancement and energy savings for critical applications such as electric vehicles, high performance machine tools, fans, compressors, etc. IM drives without having speed sensors or optical encoders mounted at the motor shaft are attractive because of their lower cost and higher reliability. When mechanical speed sensor is removed, the rotor speed information is estimated using the measured quantities of stator voltages and currents at the IM terminals. This paper highlights the sensorless techniques applied to the IM drives for sustainable reliability and energy savings. Overview on the IM mathematical model is briefly summarized to establish a physical basis for the sensorless schemes used. Further, the different types of IM-VFDs are presented in the paper. The main focus of this review is on the sensorless estimation techniques which are being applied to make IM-VFDs more effective during wide speed operations including very-high and very-low speed regions.

Ibrahim M. Alsofyani; N.R.N. Idris

2013-01-01T23:59:59.000Z

4

Variable Frequency Pump Drives  

E-Print Network [OSTI]

-frequency electric motor drive. What is happenin9 with variable frequency driven pun,ps is a classical illustration that evolution in technical products takes place not only because of changes in the processes served by these products, or because of innovations...-pole 3550 rpm squirrel caqe induction motor became available in the early 1930s that high pressure pumps operating at that speed could be buil t. And now, in the 1980s, the development of the solid-state, variable frequency electric motor drive...

Karassik, I. J.; Petraccaro, L. L.; McGuire, J. T.

5

Measurable energy savings of installing variable frequency drives for cooling towersí fans, compared to dual speed motors  

Science Journals Connector (OSTI)

Abstract In recent years the building management system (BMS) controllers have been used to control the operation of heating, ventilation, and air conditioning system in addition to lighting and some electrical equipment in order to save energy. In the water cooled system, the BMS controls the operation process of the cooling towers (CTs) fans of dual speed motors to maintain a constant leaving water temperature for different cooling loads and different ambient wet bulb temperature (WBT). This paper presents the effect of installing variable frequency drives (VFDs) for \\{CTs\\} fans in Kuwait during summer season on energy savings compared to dual speed control. The results have shown that with VFD mode, the reduction in water consumption was over 13% compared to the commonly used dual speed mode. More importantly, the combined power for the chillers and the \\{CTs\\} fans for the same amount of cooling produced were reduced by 5.8% in the VFD mode.

E. Al-Bassam; R. Alasseri

2013-01-01T23:59:59.000Z

6

Effect on energy use and greenhouse microclimate through fan motor control by variable frequency drives  

Science Journals Connector (OSTI)

A comparison was conducted between ONĖOFF and variable frequency drive (VFD) systems to control greenhouse ventilation fans. The study aimed to determine the effect of each system on the energy consumption and resulting greenhouse microclimate. The experiments were conducted in a commercial size greenhouse in which pepper was grown. To check the performance of the fan that was controlled by a VFD system, it was installed in a test facility and operated under several rotation speeds. At each speed of rotation, the static pressure on the fan was changed and parameters, such as electricity consumption and air flow rate, were measured. Reducing the fan speed with the VFD system resulted in reductions in the air flow rate through the greenhouse and energy consumption, the latter being much more significant. The study showed that VFD control can reduce electricity consumption compared with ONĖOFF operation by an amount that depends on the weather. In the present study, the average energy consumption with the VFD control system over a period of one month, was about 0.64 of that with an ONĖOFF system. The average greenhouse daily air temperatures and humidity ratios obtained with each control system between 0700 and 1800 were nearly equal during that month. The results obtained in the greenhouse further show that the VFD system has a greater potential than the ONĖOFF to reduce the range of amplitude variations in the air temperature and humidity ratio within the greenhouse.

Meir Teitel; Yun Zhao; Moti Barak; Eli Bar-lev; David Shmuel

2004-01-01T23:59:59.000Z

7

Energy saving in agricultural buildings through fan motor control by variable frequency drives  

Science Journals Connector (OSTI)

A comparison was conducted between ONĖOFF and variable frequency drive (VFD) systems to control ventilation fans of greenhouses and poultry houses. The study aimed to determine the effect of each system on the energy consumption and resulting microclimate within the houses. The experiments were carried out in a commercial-size greenhouse in which pepper was grown and in commercial poultry houses. Reducing the fan speed with the VFD system resulted in reductions in the airflow rate through the houses and energy consumption, the latter being much more significant. The study showed that VFD control can reduce electricity consumption compared with ONĖOFF operation. In the present study, the average energy consumption with the VFD control system was about 0.64 and 0.75 of that with an ONĖOFF system in the greenhouse and poultry houses, respectively. The average greenhouse daily air temperatures and humidity ratios obtained with each control system between 07:00 and 18:00 were nearly equal. The results obtained in the greenhouse further showed that the VFD system has a greater potential than the ONĖOFF, to reduce the range of amplitude variations in the air temperature and humidity ratio within the greenhouse. The average air temperatures over day and night, in the poultry houses, with each control system were nearly equal. The relative humidity, however, was slightly lower with VFD than with ONĖOFF. Reductions in the range of amplitude variations of the air temperature and humidity were also observed in the poultry houses.

Meir Teitel; Asher Levi; Yun Zhao; Moti Barak; Eli Bar-lev; David Shmuel

2008-01-01T23:59:59.000Z

8

Variable Frequency Drives  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

How BPA Supports VFDs Rebates are available from your utility for Variable Frequency Drives on pumps 20hp or greater and storage fans.. Energy savings from VFDs vary and can...

9

Frequency modulation drive for a piezoelectric motor  

DOE Patents [OSTI]

A piezoelectric motor has peak performance at a specific frequency f.sub.1 that may vary over a range of frequencies. A drive system is disclosed for operating such a motor at peak performance without feedback. The drive system consists of the motor and an ac source connected to power the motor, the ac source repeatedly generating a frequency over a range from f.sub.1 -.DELTA.x to f.sub.1 +.DELTA.y.

Mittas, Anthony (Albuquerque, NM)

2001-01-01T23:59:59.000Z

10

Chapter 18: Variable Frequency Drive Evaluation Protocol  

SciTech Connect (OSTI)

An adjustable-speed drive (ASD) includes all devices that vary the speed of a rotating load, including those that vary the motor speed and linkage devices that allow constant motor speed while varying the load speed. The Variable Frequency Drive Evaluation Protocol presented here addresses evaluation issues for variable-frequency drives (VFDs) installed on commercial and industrial motor-driven centrifugal fans and pumps for which torque varies with speed. Constant torque load applications, such as those for positive displacement pumps, are not covered by this protocol. Other ASD devices, such as magnetic drive, eddy current drives, variable belt sheave drives, or direct current motor variable voltage drives, are also not addressed. The VFD is by far the most common type of ASD hardware. With VFD speed control on a centrifugal fan or pump motor, energy use follows the affinity laws, which state that the motor electricity demand is a cubic relationship to speed under ideal conditions. Therefore, if the motor runs at 75% speed, the motor demand will ideally be reduced to 42% of full load power; however, with other losses it is about 49% of full load power.

Romberger, J.

2014-11-01T23:59:59.000Z

11

Analysis and Simulation of Mechanical Trains Driven by Variable Frequency Drive Systems.  

E-Print Network [OSTI]

??Induction motors and Variable Frequency Drives (VFDs) are widely used in industry to drive machinery trains. However, some mechanical trains driven by VFD-motor systems haveÖ (more)

Han, Xu

2012-01-01T23:59:59.000Z

12

Variable current speed controller for eddy current motors  

DOE Patents [OSTI]

A speed control system for eddy current motors is provided in which the current to the motor from a constant frequency power source is varied by comparing the actual motor speed signal with a setpoint speed signal to control the motor speed according to the selected setpoint speed. A three-phase variable voltage autotransformer is provided for controlling the voltage from a three-phase power supply. A corresponding plurality of current control resistors is provided in series with each phase of the autotransformer output connected to inputs of a three-phase motor. Each resistor is connected in parallel with a set of normally closed contacts of plurality of relays which are operated by control logic. A logic circuit compares the selected speed with the actual motor speed obtained from a digital tachometer monitoring the motor spindle speed and operated the relays to add or substract resistance equally in each phase of the motor input to vary the motor current to control the motor at the selected speed.

Gerth, H.L.; Bailey, J.M.; Casstevens, J.M.; Dixon, J.H.; Griffith, B.O.; Igou, R.E.

1982-03-12T23:59:59.000Z

13

Abstract--The induction motor is well known as the workhorse of industry. The development of variable speed  

E-Print Network [OSTI]

of variable speed induction motor drives has a long history of more than four decades. Today's sophisticated--Induction motor control I. INTRODUCTION EFORE the invention of variable frequency voltage and current source inverters the induction motor was never thought as continuously variable speed drive. Only some adaptations

Paderborn, Universität

14

Method and apparatus for monitoring the rotating frequency of de-energized induction motors  

DOE Patents [OSTI]

The rotational speed of a coasting induction motor is measured by sensing e residual electrical voltages at the power terminals of the motor, thus eliminating the need for conventional tachometer equipment, additional mechanical components or modifications to the induction motor itself. The power terminal voltage signal is detected and transformed into a DC voltage proportional to the frequency of the signal. This DC voltage can be input to the control system of a variable frequency motor controller to regulate the output characteristics thereof relative to the speed of the coasting motor. 6 figs.

Mikesell, H.E.; Lucy, E.

1998-02-03T23:59:59.000Z

15

Analysis and Simulation of Mechanical Trains Driven by Variable Frequency Drive Systems  

E-Print Network [OSTI]

Induction motors and Variable Frequency Drives (VFDs) are widely used in industry to drive machinery trains. However, some mechanical trains driven by VFD-motor systems have encountered torsional vibration problems. This vibration can induce large...

Han, Xu

2012-02-14T23:59:59.000Z

16

Variable frequency microwave heating apparatus  

DOE Patents [OSTI]

A variable frequency microwave heating apparatus (10) designed to allow modulation of the frequency of the microwaves introduced into a multi-mode microwave cavity (34) for testing or other selected applications. The variable frequency microwave heating apparatus (10) includes a microwave signal generator (12) and a high-power microwave amplifier (20) or a high-power microwave oscillator (14). A power supply (22) is provided for operation of the high-power microwave oscillator (14) or microwave amplifier (20). A directional coupler (24) is provided for detecting the direction and amplitude of signals incident upon and reflected from the microwave cavity (34). A first power meter (30) is provided for measuring the power delivered to the microwave furnace (32). A second power meter (26) detects the magnitude of reflected power. Reflected power is dissipated in the reflected power load (28).

Bible, Don W. (Clinton, TN); Lauf, Robert J. (Oak Ridge, TN); Johnson, Arvid C. (Lake in the Hills, IL); Thigpen, Larry T. (Angier, NC)

1999-01-01T23:59:59.000Z

17

Variable frequency microwave furnace system  

DOE Patents [OSTI]

A variable frequency microwave furnace system (10) designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity (34) for testing or other selected applications. The variable frequency microwave furnace system (10) includes a microwave signal generator (12) or microwave voltage-controlled oscillator (14) for generating a low-power microwave signal for input to the microwave furnace. A first amplifier (18) may be provided to amplify the magnitude of the signal output from the microwave signal generator (12) or the microwave voltage-controlled oscillator (14). A second amplifier (20) is provided for processing the signal output by the first amplifier (18). The second amplifier (20) outputs the microwave signal input to the furnace cavity (34). In the preferred embodiment, the second amplifier (20) is a traveling-wave tube (TWT). A power supply (22) is provided for operation of the second amplifier (20). A directional coupler (24) is provided for detecting the direction of a signal and further directing the signal depending on the detected direction. A first power meter (30) is provided for measuring the power delivered to the microwave furnace (32). A second power meter (26) detects the magnitude of reflected power. Reflected power is dissipated in the reflected power load (28).

Bible, Don W. (Clinton, TN); Lauf, Robert J. (Oak Ridge, TN)

1994-01-01T23:59:59.000Z

18

Variable frequency microwave furnace system  

DOE Patents [OSTI]

A variable frequency microwave furnace system designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity for testing or other selected applications. The variable frequency microwave furnace system includes a microwave signal generator or microwave voltage-controlled oscillator for generating a low-power microwave signal for input to the microwave furnace. A first amplifier may be provided to amplify the magnitude of the signal output from the microwave signal generator or the microwave voltage-controlled oscillator. A second amplifier is provided for processing the signal output by the first amplifier. The second amplifier outputs the microwave signal input to the furnace cavity. In the preferred embodiment, the second amplifier is a traveling-wave tube (TWT). A power supply is provided for operation of the second amplifier. A directional coupler is provided for detecting the direction of a signal and further directing the signal depending on the detected direction. A first power meter is provided for measuring the power delivered to the microwave furnace. A second power meter detects the magnitude of reflected power. Reflected power is dissipated in the reflected power load. 5 figs.

Bible, D.W.; Lauf, R.J.

1994-06-14T23:59:59.000Z

19

A study on current characteristics of induction motor while operating at its base frequency in textile industry  

Science Journals Connector (OSTI)

Abstract In the increasing amounts of three-phase squirrel-cage induction motors over the years are fed by variable-speed drives in majority of the industries. This paper deals about the current and power characteristics of induction motor while it operating at its base frequency with variable speed drive. Various studies have been conducted in textile industry to prove the above phenomena. When the motor runs at its base frequency through VFD (variable-frequency drive), considerable energy saving is possible. In this study, around 3.6 units saved for one operating cycle of Ringframe machine in textile industry.

Y. Dhayaneswaran; L. Ashok Kumar

2014-01-01T23:59:59.000Z

20

A frequency converter for a propelling electric motor  

Science Journals Connector (OSTI)

A description and main technical characteristics of a frequency converter (FC) designed to supply power to a two-winding asynchronous propelling motor based on a three-level inverter with an output filter that...

G. M. Mustafa; S. V. Volkov; A. M. Ershov; Yu. M. SennovÖ

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

High efficiency pool filtering systems utilising variable frequency drives  

Science Journals Connector (OSTI)

Over 1 year, private swimming pools in Australia will typically consume 1680†GWh of electricity, producing 2130†kt of CO2. Redesigning a pool's filtration system and using it more efficiently can reduce the energy use, and hence the CO2 production, by a significant amount. This paper describes experimental measurements carried out on a new design of pool pump system. Initial experiments using a variable frequency drive (VFD) with a standard, single phase pump/motor system have achieved energy savings of 40%. Utilising a VFD and a three phase pump/motor energy savings of 61% have been achieved, without degrading the system performance.

Z. Hameiri; T. Spooner; A.B. Sproul

2009-01-01T23:59:59.000Z

22

INSTALLATION, COMMISSIONING AND TROUBLE SHOOTING OF VARIABLE FREQUENCY DRIVE.  

E-Print Network [OSTI]

??In this thesis, the installation of variable frequency drive on board a ship is introduced briefly. In this particular study the variable frequency drive wasÖ (more)

Kuituniemi, Santtu

2013-01-01T23:59:59.000Z

23

Adhesive bonding using variable frequency microwave energy  

DOE Patents [OSTI]

Methods of facilitating the adhesive bonding of various components with variable frequency microwave energy are disclosed. The time required to cure a polymeric adhesive is decreased by placing components to be bonded via the adhesive in a microwave heating apparatus having a multimode cavity and irradiated with microwaves of varying frequencies. Methods of uniformly heating various articles having conductive fibers disposed therein are provided. Microwave energy may be selectively oriented to enter an edge portion of an article having conductive fibers therein. An edge portion of an article having conductive fibers therein may be selectively shielded from microwave energy.

Lauf, Robert J. (Oak Ridge, TN); McMillan, April D. (Knoxville, TN); Paulauskas, Felix L. (Oak Ridge, TN); Fathi, Zakaryae (Cary, NC); Wei, Jianghua (Raleigh, NC)

1998-01-01T23:59:59.000Z

24

Adhesive bonding using variable frequency microwave energy  

DOE Patents [OSTI]

Methods of facilitating the adhesive bonding of various components with variable frequency microwave energy are disclosed. The time required to cure a polymeric adhesive is decreased by placing components to be bonded via the adhesive in a microwave heating apparatus having a multimode cavity and irradiated with microwaves of varying frequencies. Methods of uniformly heating various articles having conductive fibers disposed therein are provided. Microwave energy may be selectively oriented to enter an edge portion of an article having conductive fibers therein. An edge portion of an article having conductive fibers therein may be selectively shielded from microwave energy. 26 figs.

Lauf, R.J.; McMillan, A.D.; Paulauskas, F.L.; Fathi, Z.; Wei, J.

1998-09-08T23:59:59.000Z

25

Adhesive bonding using variable frequency microwave energy  

DOE Patents [OSTI]

Methods of facilitating the adhesive bonding of various components with variable frequency microwave energy are disclosed. The time required to cure a polymeric adhesive is decreased by placing components to be bonded via the adhesive in a microwave heating apparatus having a multimode cavity and irradiated with microwaves of varying frequencies. Methods of uniformly heating various articles having conductive fibers disposed therein are provided. Microwave energy may be selectively oriented to enter an edge portion of an article having conductive fibers therein. An edge portion of an article having conductive fibers therein may be selectively shielded from microwave energy. 26 figs.

Lauf, R.J.; McMillan, A.D.; Paulauskas, F.L.; Fathi, Z.; Wei, J.

1998-08-25T23:59:59.000Z

26

The prevalent motor bearing premature failures due to the high frequency electric current passage  

Science Journals Connector (OSTI)

Abstract Bearing premature failures are prevalent in VFD (Variable Frequency Drives) motors. The three common symptoms of the modern bearing current appeared on the bearings of a group of pump motors. The bearing failure mechanisms have been studied from the tribological point of view. The natures of the three common symptoms have been uncovered. A hypothesis of the skin effect has been proposed to explain the three common symptoms. The discovery of the serial microcraters reveals the discharge with Fourier series features. The nature of the fluting patterns excluded the theories of both EDM (Electrical Discharge Machining) and discharge corrugation. VA (Vibration Analysis) detected the harmonics of the BPOR (Ball Pass Outer Ring) frequency which associated with the fluting on the outer raceway. This discovery may be applied to detect fluting in condition monitoring.

William Liu

2014-01-01T23:59:59.000Z

27

High-frequency equivalent model of AC motor for electric vehicle drive system  

Science Journals Connector (OSTI)

The application of the motor drive system in electric and hybrid-electric vehicles can lead to a significant increase in electromagnetic compatibility. The AC motor as an important part of motor drive system must be considered. In this paper, a high frequency modelling method of the AC motor is presented. The modelling method consists of deriving the motor model parameters from mathematical resolution of the electrical circuit equations and observation of the variations of the motor impedance with the frequency. All parameters of the proposed models are obtained by differential mode (DM) and common mode (CM) impedance measurement in the frequency domain. The model is verified by impedance measurement of a synchronous motor. The method proposed can be used to obtain a high-frequency equivalent circuit of an AC motor and predict conducted electromagnetic interference in a motor drive system.

Yongming Yang; Hemeng Peng; Quandi Wang

2013-01-01T23:59:59.000Z

28

Replacement, Variable-Speed Motors for Furnaces, Syracuse, New...  

Energy Savers [EERE]

replace- ment for PSC motors in many homes. To date, CARB has upgraded six systems with Concept 3 motors. Upgrading a fan motor is usually very straightforward. Once...

29

A techno-economic analysis of cost savings for retrofitting industrial aerial coolers with variable frequency drives  

Science Journals Connector (OSTI)

A techno-economic model was created in order to develop curves that show the typical annual energy savings, rate of return, and payback for retrofitting aerial coolers with variable frequency drives (VFDs) for up to 50†motors, motor sizes from 4 to 186†kW (5Ė250†hp), and varying climate conditions. The cost savings due to installing a VFD depends on the reduction in energy used, as well as the reduction in power demand, the capital cost of the VFD, installation cost of the VFD, change in operating cost, and cost of electricity. The geographic locations examined in this report were Fort McMurray, Calgary, Vancouver, and Thunder Bay. This study found that the IRR increases rapidly with motor size, becomes greater than 10% at a motor size of approximately 15†kW, and may be as high as 220% (for the case of fifty, 186†kW motors). The IRR is sensitive to the number of fan motors retrofitted with VFDs, however the sensitivity rapidly declines as the number of motors is increased beyond five. The simple payback period becomes less than 1†year and nearly independent of number of motors and motor size for motors larger than 90†kW. Ambient temperature and geographic location affect the profitability of the investment, although the IRR only changes by approximately 4%.

Patrick Miller; Babatunde Olateju; Amit Kumar

2012-01-01T23:59:59.000Z

30

Present and Future Modes of Low Frequency Climate Variability  

SciTech Connect (OSTI)

This project addressed area (1) of the FOA, ďInteraction of Climate Change and Low Frequency Modes of Natural Climate VariabilityĒ. Our overarching objective is to detect, describe and understand the changes in low frequency variability between model simulations of the preindustrial climate and simulations of a doubled CO2 climate. The deliverables are a set of papers providing a dynamical characterization of interannual, decadal, and multidecadal variability in coupled models with attention to the changes in this low frequency variability between pre-industrial concentrations of greenhouse gases and a doubling of atmospheric concentrations of CO2. The principle mode of analysis, singular vector decomposition, is designed to advance our physical, mechanistic understanding. This study will include external natural variability due to solar and volcanic aerosol variations as well as variability internal to the climate system. An important byproduct is a set of analysis tools for estimating global singular vector structures from the archived output of model simulations.

Cane, Mark A.

2014-02-20T23:59:59.000Z

31

Conservation Theory Process Control Using Variable Frequency Drives  

E-Print Network [OSTI]

The purpose of this paper is to outline some of the economic considerations of variable frequency control and to point out possible applications in order to create greater awareness of the options available to the engineer as he develops new...

Myers, N. S.

1980-01-01T23:59:59.000Z

32

Variable Frequency AC Drives for Cooling Tower Energy Efficiency  

E-Print Network [OSTI]

and economics. Automatic fan speed control by sensing cold water temperature is the economic essence of the application of adjustable frequency power to A-C fan motors. 2.2 Cell Partitions In some multi-cell mechanical-draft cooling towers, the isolation... of individual cell air streams is ineffective due to one or more of the following: --Partitions are missing. --Partitions are incomplete. This condition results in temperature control problems. For example, if constant CWT is desired, and no means...

Corey, R. W.

1982-01-01T23:59:59.000Z

33

Techno-economic feasibility study of providing variable frequency drive for high pressure pump, SWRO plant at NDDP, Kalpakkam  

Science Journals Connector (OSTI)

The cost of product water is a key factor in determination of acceptability of any desalination system and plant. In case of Sea Water Reverse Osmosis plants, most of the energy consumed is in the form of electricity. The High Pressure Pump (HPP) is the single major energy consuming equipment with a share of above 75%. Hence reduction in energy consumed by HPP will have a substantial effect on the overall energy consumption. The high starting torque requirement of high pressure pump results in increased acceleration time of the motor which subsequently increases the strain on the upstream electrical system from motor feeder to transformer. Provision of a Variable Frequency Drive can be a solution for both the above problems. This paper studies the techno-economic feasibility of providing variable frequency drive for HPP motor at NDDP, Kalpakkam.

R. Nagaraj; V. Murugan; Ashok Y. Dangore; K.L. Thalor; S. Prabakar; V.K. Srivastava; P.K. Tewari

2010-01-01T23:59:59.000Z

34

Abstract Efficiency issues of variable-capacitance micromotors are discussed in context of combined drive and motor  

E-Print Network [OSTI]

motors, electric drives, efficiency I. INTRODUCTION An active area of research for commercial of combined drive and motor interaction. It is shown that variable-capacitance motors ideally have nearly, the drive system consisting of both the motor and electronics is not ideal when considering different

Chapman, Patrick

35

Evaluation of Retrofit Variable-Speed Furnace Fan Motors  

SciTech Connect (OSTI)

In conjunction with the New York State Energy Research and Development Authority (NYSERDA) and Proctor Engineering Group, Ltd. (PEG), the Consortium for Advanced Residential Buildings (CARB) has evaluated the Concept 3 (tm) replacement motors for residential furnaces. These brushless, permanent magnet (BPM) motors can use much less electricity than their PSC (permanent split capacitor) predecessors. This evaluation focuses on existing homes in the heating-dominated climate of upstate New York with the goals of characterizing field performance and cost-effectiveness. The results of this study are intended to be useful to home performance contractors, HVAC contractors, and home efficiency program stakeholders. The project includes eight homes in and near Syracuse, NY. Tests and monitoring was performed both before and after fan motors were replaced. Average fan power reductions were approximately 126 Watts during heating and 220 Watts during cooling operation. Over the course of entire heating and cooling seasons, these translated into average electric energy savings of 163 kWh. Average cost savings were $20 per year. Homes where the fan was used outside of heating and cooling mode saved an additional $42 per year on average. Results indicate that BPM replacement motors will be most cost-effective in HVAC systems with longer run times and relatively low duct static pressures. More dramatic savings are possible if occupants use the fan-only setting when there is no thermal load. There are millions of cold-climate, U.S. homes that meet these criteria, but the savings in most homes tested in this study were modest.

Aldrich, R.; Williamson, J.

2014-01-01T23:59:59.000Z

36

Trapping and Frequency Variability in Electron Acoustic Waves  

E-Print Network [OSTI]

Trapping and Frequency Variability in Electron Acoustic Waves C.F. Driscoll, F. Anderegg, D 92093 USA Abstract. Electron Acoustic Waves (EAWs) with a phase velocity less than twice the plasma Langmuir waves, and at large excitations resonance is observed over a broad range. Laser Induced

California at San Diego, University of

37

Method for curing polymers using variable-frequency microwave heating  

DOE Patents [OSTI]

A method for curing polymers incorporating a variable frequency microwave furnace system designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity is disclosed. By varying the frequency of the microwave signal, non-uniformities within the cavity are minimized, thereby achieving a more uniform cure throughout the workpiece. A directional coupler is provided for detecting the direction of a signal and further directing the signal depending on the detected direction. A first power meter is provided for measuring the power delivered to the microwave furnace. A second power meter detects the magnitude of reflected power. The furnace cavity may be adapted to be used to cure materials defining a continuous sheet or which require compressive forces during curing. 15 figs.

Lauf, R.J.; Bible, D.W.; Paulauskas, F.L.

1998-02-24T23:59:59.000Z

38

Method for curing polymers using variable-frequency microwave heating  

DOE Patents [OSTI]

A method for curing polymers (11) incorporating a variable frequency microwave furnace system (10) designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity (34). By varying the frequency of the microwave signal, non-uniformities within the cavity (34) are minimized, thereby achieving a more uniform cure throughout the workpiece (36). A directional coupler (24) is provided for detecting the direction of a signal and further directing the signal depending on the detected direction. A first power meter (30) is provided for measuring the power delivered to the microwave furnace (32). A second power meter (26) detects the magnitude of reflected power. The furnace cavity (34) may be adapted to be used to cure materials defining a continuous sheet or which require compressive forces during curing.

Lauf, Robert J. (Oak Ridge, TN); Bible, Don W. (Clinton, TN); Paulauskas, Felix L. (Oak Ridge, TN)

1998-01-01T23:59:59.000Z

39

Efficient Energy Management: Is Variable Frequency Drives the Solution  

Science Journals Connector (OSTI)

Abstract Over the last few years the cost of power electricity has increased significantly. Researchers and manufacturers of electrical goods have been trying to find ways to minimize the use of power electricity while maintaining the efficiency of electrical equipments. To provide efficient energy management for today's market, manufacturers are now turning to a technology known as variable frequency drives (VFDs). \\{VFDs\\} are being used for various equipments ranging from small electrical appliances to the largest of mine mill drives and compressors. Household air conditioning compressors, for example, are not short of running on VFD technology. This concept paper will discuss the alternative use of this energy.

Nasir Khalid

2014-01-01T23:59:59.000Z

40

Wavelet based Neuro-Detector for low frequencies of vibration signals in electric motors  

Science Journals Connector (OSTI)

This study presents a Wavelet based Neuro-Detector approach employed to detect the aging indications of an electric motor. Analysis of the aging indications, which can be seen in the low frequency region, is performed using vibration signals. More specifically, two vibration signals are observed for healthy and faulty (aged) cases which are measured from the same electric motor. Multi Resolution Wavelet Analysis (MRWA) is applied in order to obtain low and high frequency bands of the vibration signals. Thus for detecting the aging properties in the spectra, the Power Spectral Density (PSD) of the subband for the healthy case is used to train an Auto Associative Neural Network (AANN). The PSD amplitudes, which are computed for the faulty case, are applied to input nodes of the trained network for the re-calling process of AANN. Consequently, the simulation results show that some spectral properties defined in low frequency region are determined through the error response of AANN. Hence, some specific frequencies of the bearing damage related to the aging process are detected and identified.

Duygu Bayram; Serhat ?eker

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Magnetically Coupled Adjustable Speed Motor Drives  

Broader source: Energy.gov [DOE]

Alternating current electric motors rotate at a nearly constant speed that is determined by motor design and line frequency. Energy savings of 50% or more may be available when fixed speed systems are modified to allow the motor speed to match variable load requirements of a centrifugal fan or pump. This tip sheet describes the advantages of magnetically coupled ASDs and provides suggested actions.

42

Control of a 6/4 switched reluctance motor in a variable speed pumping application  

Science Journals Connector (OSTI)

An original variable-speed pumping system was developed through integrating a power converter, switched reluctance motor (SRM), centrifugal pump, and speed control strategy. A customized power converter and speed control strategy were selected, designed, and implemented to regulate the speed of the SRM-pump system. The control strategy to regulate the speed of the SRM consisted of a digital controller made with PI and phase-lead compensators in series and, simultaneously, adjusting the advanced firing angle as a function of the desired motor speed. It was experimentally demonstrated that the inverter-SRM-pump system is a good option to drive a centrifugal pump with a relatively high efficiency at all speeds.

Horacio Vasquez; Joey Parker; Timothy Haskew

2005-01-01T23:59:59.000Z

43

A novel high power density permanent magnet variable-speed motor  

SciTech Connect (OSTI)

This paper proposes a novel polyphase multipole permanent magnet motor which possesses high power density, high efficiency and excellent controllability, yet can be produced by conventional fabrication technique. The basic operating principles, design features, performance analysis and control system are described. The experimental results of a 5 kW, 1,500 rpm prototype motor and its comparison with other types of motors such as switched reluctance motor and induction motor are given. This proposed motor has the potential to compete in certain applications.

Chan, C.C.; Chen, G.H.; Jiang, J.Z.; Wang, X.Y. (Univ. of Hong Kong (Hong Kong))

1993-06-01T23:59:59.000Z

44

Variable optical attenuator with a polymer-stabilized dual-frequency liquid crystal  

E-Print Network [OSTI]

Variable optical attenuator with a polymer-stabilized dual-frequency liquid crystal Yung-Hsun Wu. For the DFLC-based homogeneous cell, we use a low- frequency 1 kHz electric field to drive the VOA and a high-frequency, Xiao Liang, Yan-Qing Lu, Fang Du, Yi-Hsin Lin, and Shin-Tson Wu A transmission-type variable optical

Wu, Shin-Tson

45

Robust Condition Monitoring and Fault Diagnosis of Variable Speed Induction Motor Drives  

E-Print Network [OSTI]

detection (FD) probability versus SNR. ........................ 33 2.6 Experimental setup: (a) faulty test motors, (b) DC generator, (c) 3-hp induction motor, (d) data acquisition board, (e) torque monitor, (f) oscilloscope, and (g) spectrum analyzer... detection (FD) probability versus SNR. ........................ 33 2.6 Experimental setup: (a) faulty test motors, (b) DC generator, (c) 3-hp induction motor, (d) data acquisition board, (e) torque monitor, (f) oscilloscope, and (g) spectrum analyzer...

Choi, Seungdeog

2012-02-14T23:59:59.000Z

46

Chapter Seven - Variable speed drives  

Science Journals Connector (OSTI)

Publisher Summary The electromechanical controllers are a kind of variable speed drives (VSDs) that are obsolete but are still in use because when a motor and a drive is combined, they become a power drive system (PDS). There are two ways of varying the speed of an induction motor, either by varying the motor slip or by varying the supply frequency. The preferred practice for electrical speed variation is to change the supply frequency with a variable frequency drive (VFD). Many other designs also have been developed. However, except the specialized applications, few are still in operation. A number of motor and drive manufacturers are now producing the integrated motor/VFD units. These units consist of a motor and a specially designed VFD, produced as a single package, with the VFD unit mounted variously on the top, side, or end of the motor.

Europump; Hydraulic Institute

2005-01-01T23:59:59.000Z

47

A very high frequency CMOS Variable Gain Amplifier  

E-Print Network [OSTI]

of the VGA output signal . . . . . . . . . 80 Bandwidth with different frequency compensation circuits bias current at 22dB gain setting. . . 84 XIV VGA comparison . . . 88 LIST OF FIGURE FIGURE I 2", 3 and 4'" order sigma-delta modulator SNR vs. input... level . . . . Page 2 Block diagram of a direct conversion receiver. 3 Single transistor transconductor 4 Differential pair 5 Source degeneration amplifier. 6 Four-quadrant multiplier basic architectures . . . . . . . . 10 7 Multiplier as a...

Tan, Siang Tong

2012-06-07T23:59:59.000Z

48

Vacuum electron acceleration by using two variable frequency laser pulses  

SciTech Connect (OSTI)

A method is proposed for producing a relativistic electron bunch in vacuum via direct acceleration by using two frequency-chirped laser pulses. We consider the linearly polarized frequency-chiped Hermit-Gaussian 0, 0 mode lasers with linear chirp in which the local frequency varies linearly in time and space. Electron motion is investigated through a numerical simulation using a three-dimensional particle trajectory code in which the relativistic Newton's equations of motion with corresponding Lorentz force are solved. Two oblique laser pulses with proper chirp parameters and propagation angles are used for the electron acceleration along the z-axis. In this way, an electron initially at rest located at the origin could achieve high energy, ?=319 with the scattering angle of 1.02{sup ?} with respect to the z-axis. Moreover, the acceleration of an electron in different initial positions on each coordinate axis is investigated. It was found that this mechanism has the capability of producing high energy electron microbunches with low scattering angles. The energy gain of an electron initially located at some regions on each axis could be greatly enhanced compared to the single pulse acceleration. Furthermore, the scattering angle will be lowered compared to the acceleration by using laser pulses propagating along the z-axis.

Saberi, H.; Maraghechi, B. [Department of Physics, Amirkabir University of Technology, 15875-4413 Tehran (Iran, Islamic Republic of)] [Department of Physics, Amirkabir University of Technology, 15875-4413 Tehran (Iran, Islamic Republic of)

2013-12-15T23:59:59.000Z

49

Semiconductor converters of electric energy electromagnetic and electromechanical processes in an electric drive under frequency converter parallel operation to induction motor  

Science Journals Connector (OSTI)

The processes occurring in the two PWM-controlled frequency converters operating in parallel to an induction motor in the high-power electric driveís start and self-start modes ... current consumed from the suppl...

D. V. Belyaev; A. M. Veinger; G. B. LazarevÖ

2007-05-01T23:59:59.000Z

50

A novel approach to controlling the phase angle of a variable switched reluctance motor for electric vehicle propulsion using the statistic matrix norm  

SciTech Connect (OSTI)

Variable switched reluctance (VSR) motors are gaining importance for industrial applications. The paper will introduce a novel approach to simplify the computation involved in the control of VSR motors. Results are shown, that validate the approach and demonstrates the superior performance compared to tabulated control parameters with linear interpolation, which are widely used in implementations.

Holling, G.H. [Advanced Motion Controls Inc., Princeton, WI (United States)

1994-12-31T23:59:59.000Z

51

When Should Inverter-Duty Motors Be Specified?  

Broader source: Energy.gov [DOE]

Electronic adjustable speed drives, known as variable frequency drives (VFD), used to be marketed as ďusable with any standard motor.Ē However, premature failures of motor insulation systems began to occur as fast-switching, pulse-width-modulated (PWM) VFDs were introduced. The switching rates of modern power semiconductors can lead to voltage overshoots. These voltage spikes can rapidly damage a motorís insulation system, resulting in premature motor failure. This tip sheet discusses the effects of VFDs on induction motors and offers suggested actions.

52

A motor-generator and supercapacitor based system for microgrid frequency stabilization.  

E-Print Network [OSTI]

??This research introduces an energy storage system to deliver microgrid frequency response. A doubly-fed induction generator (DFIG) and a squirrel cage induction machine (SCIM) areÖ (more)

Crispo, Richard F.

2013-01-01T23:59:59.000Z

53

Application of multi-variable control for automatic frequency controller of HVDC transmission system  

SciTech Connect (OSTI)

In an HVDC transmission system that links two ac power systems, the automatic frequency controller (AFC) calculates power to be interchanged between the two ac systems according to their frequencies thereby improving the frequency characteristics of the two power systems. This paper introduces a newly developed dc AFC system, which applies a multi-variable control to the dc system-based frequency control. It is capable of controlling the frequencies of the two ac systems optimally while maintaining their stability. This system was developed for one of Japan's HVDC transmission facilities and produced good results in a combined test using a power system simulator. The field installation will be completed in March 1993, when the AFC system will enter service.

Sanpei, Masatoshi (Electric Power Development Co., Tokyo (Japan)); Kakehi, Atsuyuki; Takeda, Hideo (Toshiba Corp., Tokyo (Japan))

1994-04-01T23:59:59.000Z

54

When Money Is Not Enough: Awareness, Success, and Variability in Motor Learning  

E-Print Network [OSTI]

.diedrichsen@ucl.ac.uk Introduction How do people learn complex motor skills such as playing a musical instrument or downhill skiing, the velocity and position of the shoulder and elbow joints, the orientation of the wrist, and the exact timing

Dayan, Peter

55

Electro-Thermal Dynamics and the Effects of Generalized Discontinuous Pulse Width Modulation Algorithms on High Performance Variable Frequency Drives.  

E-Print Network [OSTI]

??This thesis is concerned with issues observed with the variable frequency drive, VFD, traction inverter used in the Buckeye Bullet 3 as it performed duringÖ (more)

Krohn, Austin Bengoechea

2014-01-01T23:59:59.000Z

56

On the efficiency of electrical submersible pumps equipped with variable frequency drives: A field study  

SciTech Connect (OSTI)

A field study was conducted on 18 electrical-submersible-pump- (ESP-) equipped wells operating in the Williston basin. Fifteen of these wells were run with variable frequency drives (VFD`s). The purpose of the study was to determine the efficiency and operating characteristics of ESP`s operating with VFD`s and compare them to those without. Voltage, current, power, and frequency were measured at the drive input, the drive output, and ESP input. Production data were recorded and power and efficiency were calculated at all measurement locations and compared to published data.

Patterson, M.M. [Patterson (Maurice M.), Hemphill, TX (United States)

1996-02-01T23:59:59.000Z

57

Extinction risk and eco-evolutionary dynamics in a variable environment with increasing frequency of extreme events  

Science Journals Connector (OSTI)

...35] found that in a variable environment extinction...accompanied by an increased frequency of climate and point...accompanied by an increased frequency of climate and point...a continuous climate variable, such as mean of summer...climate trend mostly drives the shift of the phenotype...

2014-01-01T23:59:59.000Z

58

The variability of high-frequency acoustic backscatter from the region near the sea surface  

Science Journals Connector (OSTI)

The temporal variability of acoustic backscattering from the region near the sea surface is examined for frequencies in the 30Ė70 kHz range. A variance spectrum of the scattering strength exhibits effects associated with three different processes. Below about 0.1 Hz the spectrum contains a large contribution associated with temporal variations in the advection of bubble clouds through the measurement volume by large-scale processes. At high frequencies the spectrum asymptotes to a level characteristic of a Gaussian backscatteredpressure field from randomly moving bubbles within the scattering volume. The overall variability is treated as a slow modulation of this Gaussian process by larger-scale processes and a probability density function is derived for the scattering strength using Bayesí theorem. Finally in some cases the spectrum exhibits a peak at the frequency of the dominant surface waves. Attempts to compute coherence functions between the backscattered acoustic power and surface wave orbital velocities measured by a microwave system observing the same spot as the acoustic system resulted in very low values. This leads to the belief that the wave-induced peak in the acoustic backscatter variance spectrum is caused by highly nonlinear processes. A time series of acoustic backscatter from a vertically pointing system confirms the existence of this modulation at the dominant wave frequency and also suggests its nonlinear character.

Peter H. Dahl; William J. Plant

1997-01-01T23:59:59.000Z

59

Running time variability and resource allocation : a data-driven analysis of high-frequency bus operations  

E-Print Network [OSTI]

Running time variability is one of the most important factors determining service quality and operating cost of high-frequency bus transit. This research aims to improve performance analysis tools currently used in the bus ...

SŠnchez-MartŪnez, Gabriel Eduardo

2013-01-01T23:59:59.000Z

60

Aggregation method for motor drive systems  

Science Journals Connector (OSTI)

Abstract When many variable frequency drives are connected to a common switchboard, their aggregated effect on system dynamics can be significant. In this paper, the aggregation method for variable frequency drives and their motors in industrial facilities is proposed, which is suitable for power systems dynamic studies. The proposed method can be applied to various types of motor drive systems. There are two steps involved for the proposed aggregation method: (1) aggregate motor drive systems connected to the same bus, and (2) further combine the aggregated model of motor drive systems from Step 1 with upstream series impedance and/or transformers. Due to involvement of high-order transfer functions in dynamic models of individual motor drive systems, Pade approximation is used as a useful tool in the aggregation process. Using the proposed aggregation method, an equivalent aggregated dynamic model of motor drive systems can be obtained at the substation bus. A case study is conducted in the paper, and the proposed aggregation method is verified to be effective by the case study.

Xiaodong Liang; Wilsun Xu

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

The bi-variate frequency distribution of two concurrent climatic variables: a study of temperature and dew point  

E-Print Network [OSTI]

for calculation of joint-event probabilities from the bi-variate normal distribution as follows: X and Y are random variables following a bi- variate normal distribution with zero means, unit variances and correlation coefficient p. Then: Pr [X & h, Y 2 k) = L... 1956-1960. Despite many useful applications, the calculation of frequencies or probabilities for specified events is somewhat limited to the class selections of the variables chosen for the study. Moreover, relative humidity is not a good indicator...

Zeitler, Jon William

1991-01-01T23:59:59.000Z

62

Variable frequency drives for MSF desalination plant and associated pumping stations  

Science Journals Connector (OSTI)

Power Electronic Variable Frequency Drives (VFD) are a well proven, reliable and cost efficient solution to ensure precise control of torque and speed of electrically driven rotating machines (such as pumps, compressors, fans, extruders etc.) in a wide range of industrial process. For the purpose of pumps applications, if compared to conventional mechanical flow regulation systems (vanes, gearbox, hydraulic coupling etc.) VFD provides the advantages of more efficient energy management as well as better accuracy and flexibility in process control. Latest technologies in silicon power devices, microprocessors and software development allowed remarkable improvements in performances, reliability and cost reduction; as a consequence energy savings due to VFD use are ensuring investment pay back in a very short time. After a quick summary about basic concepts on VFD for fluid flow control and a short description of different VFDís topologies presently available, special attention is focused on a recent application for pump in a MSF desalination, as well as in other applications in pumping stations for water transmission systems associated to desalination plants.

Roberto Camoirano; Giuseppe Dellepiane

2005-01-01T23:59:59.000Z

63

Field Verification of Energy and Demand Savings of Two Injection Molding Machines Retrofitted with Variable Frequency Drives  

E-Print Network [OSTI]

Detailed field measurements of energy consumption (kWh) and demand (kW) are conducted on two injection molding machines (IMMs) used in a typical plastic manufacturing facility in the San Francisco Bay Area, with/without Variable Frequency Drives...

Liou, S. P.; Aguiar, D.

64

Comparing Two Types of Magnetically- Coupled Adjustable Speed Drives with Variable Frequency Drives in Pump and Fan Applications  

E-Print Network [OSTI]

This paper presents the results from laboratory tests on MagnaDrive Corporations fixed-magnet magnetically-coupled adjustable speed drive (MC-ASD) and Coyote Electronics electromagnetic MC-ASD as compared to a typical variable frequency drive (VFD...

Anderson, K. J.; Chvala, W. D.

65

Method for assessing motor insulation on operating motors  

DOE Patents [OSTI]

A method for monitoring the condition of electrical-motor-driven devices. The method is achieved by monitoring electrical variables associated with the functioning of an operating motor, applying these electrical variables to a three phase equivalent circuit and determining non-symmetrical faults in the operating motor based upon symmetrical components analysis techniques.

Kueck, John D. (Oak Ridge, TN); Otaduy, Pedro J. (Oak Ridge, TN)

1997-01-01T23:59:59.000Z

66

Method for assessing motor insulation on operating motors  

DOE Patents [OSTI]

A method for monitoring the condition of electrical-motor-driven devices is disclosed. The method is achieved by monitoring electrical variables associated with the functioning of an operating motor, applying these electrical variables to a three phase equivalent circuit and determining non-symmetrical faults in the operating motor based upon symmetrical components analysis techniques. 15 figs.

Kueck, J.D.; Otaduy, P.J.

1997-03-18T23:59:59.000Z

67

Use of Frequency Response Metrics to Assess the Planning and Operating Requirements for Reliable Integration of Variable Renewable Generation  

SciTech Connect (OSTI)

An interconnected electric power system is a complex system that must be operated within a safe frequency range in order to reliably maintain the instantaneous balance between generation and load. This is accomplished by ensuring that adequate resources are available to respond to expected and unexpected imbalances and restoring frequency to its scheduled value in order to ensure uninterrupted electric service to customers. Electrical systems must be flexible enough to reliably operate under a variety of"change" scenarios. System planners and operators must understand how other parts of the system change in response to the initial change, and need tools to manage such changes to ensure reliable operation within the scheduled frequency range. This report presents a systematic approach to identifying metrics that are useful for operating and planning a reliable system with increased amounts of variable renewable generation which builds on existing industry practices for frequency control after unexpected loss of a large amount of generation. The report introduces a set of metrics or tools for measuring the adequacy of frequency response within an interconnection. Based on the concept of the frequency nadir, these metrics take advantage of new information gathering and processing capabilities that system operators are developing for wide-area situational awareness. Primary frequency response is the leading metric that will be used by this report to assess the adequacy of primary frequency control reserves necessary to ensure reliable operation. It measures what is needed to arrest frequency decline (i.e., to establish frequency nadir) at a frequency higher than the highest set point for under-frequency load shedding within an interconnection. These metrics can be used to guide the reliable operation of an interconnection under changing circumstances.

Eto, Joseph H.; Undrill, John; Mackin, Peter; Daschmans, Ron; Williams, Ben; Haney, Brian; Hunt, Randall; Ellis, Jeff; Illian, Howard; Martinez, Carlos; O'Malley, Mark; Coughlin, Katie; LaCommare, Kristina Hamachi

2010-12-20T23:59:59.000Z

68

Development of Ulta-Efficient Electric Motors  

SciTech Connect (OSTI)

Electric motors utilize a large amount of electrical energy in utility and industrial applications. Electric motors constructed with high temperature superconducting (HTS) materials have the potential to dramatically reduce electric motor size and losses. HTS motors are best suited for large motor applications at ratings above 1000 horsepower (hp), where the energy savings from the efficiency improvement can overcome the additional power required to keep the superconductors on the rotor cooled. Large HTS based motors are expected to be half the volume and have half the losses of conventional induction motors of the same rating. For a 5000 hp industrial motor, this energy savings can result in $50,000 in operating cost savings over the course of a single year of operation. Since large horsepower motors utilize (or convert) about 30% of the electrical power generated in the United States and about 70% of large motors are candidates for replacement by HTS motors, the annual energy savings potential through the utilization of HTS motors can be up to $1 Billion in the United States alone. Research in the application of HTS materials to electric motors has lead to a number of HTS motor prototypes yet no industrial HTS motor product has yet been introduced. These motor demonstrations have been synchronous motors with HTS field windings, on the rotor. Figure 1-1 shows a solid model rendering of this type of motor. The rotor winding is made with HTS coils that are held at cryogenic temperature by introducing cooling fluid from the cryocooler to the rotor through a transfer coupling. The stator winding is made of copper wire. The HTS winding is thermally isolated from the warm armature and motor shafts by a vacuum insulation space and through the use of composite torque tubes. The stator in Figure 1-1 is an air core stator in that the stator teeth and a small part of the yoke is made up of nonmagnetic material so the magnetic fields distribute themselves as if in air. Between the HTS field winding and the physical air gap is a series of concentric cylinders that act as vacuum insulation space walls as well as conducting paths for induced currents to flow in order to shield the HTS winding and the rotor cold space from time dependent fields. These time dependent fields may be caused by rotor hunting, during a change in motor load, or by non-fundamental component voltages and currents applied by the inverter. These motors are variable speed controlled by the inverter. Common large motor utility and industrial applications are pump and fan drives that are best suited by a variable speed motor. Inverter control of the HTS motor eliminates the need to design the rotor for line starting, which would dump a large amount of heat into the rotor that would then heavily tax the cryogenic cooling system. The field winding is fed by a brushless exciter that provides DC current to the HTS rotor winding. The stator winding is air or water cooled. Technical and commercial hurdles to industrial HTS motor product introduction and customer acceptance include (1) the high cost of HTS wire and the cryogenic cooling system components, (2) customer concerns about reliability of HTS motors, and (3) the ability to attain the loss reduction potential of large HTS motors. Reliance Electric has demonstrated a number of HTS based electric motors up to a 1000 hp, variable speed synchronous motor with an HTS field winding in the year 2000. In 2001 this motor was tested to 1600 hp with a sinusoidal (constant frequency) supply. Figure 1-2 shows the HTS motor on the dynamometer test stand in the Reliance Electric test lab. The extensive test program of the 1000 hp motor successfully demonstrated the technical feasibility of large HTS motors and the basic technologies involved, however the test results did indicate the need for design refinements. In addition, test results served to identify other more fundamental critical technology issues, and revealed the need to continue research efforts in order to improve future HTS motor first cost, reliability, and performa

Shoykhet, B. (Baldor Comp.); Schiferl, R. (Baldor Comp.); Duckworth, R.; Rey, C.M.; Schwenterly, S.W.; Gouge, M.J.

2008-05-01T23:59:59.000Z

69

High-Frequency Variability in Hurricane Power Dissipation and Its Relationship to Global Temperature  

Science Journals Connector (OSTI)

The power dissipation of Atlantic tropical cyclones has risen dramatically during the last decades and the increase is correlated with an increase in the underlying sea surface temperature (SST) at low (decadal) frequencies. Because of the large ...

James B. Elsner; Anastasios A. Tsonis; Thomas H. Jagger

2006-06-01T23:59:59.000Z

70

Motors Motor controllers  

E-Print Network [OSTI]

Aluminium frame Motors Motor controllers Ultrasonic multi-channel acquisition PC Tank Tank 400 600 800 1000 0 50 2 4 6 8 x 10 -3 r/r 0 Range (mm) Depth(mm) 25 /t Tand / or #12;Shallow water

71

Spatial and temporal variability of the frequency of extreme daily rainfall regime in the La Plata Basin during the 20th century  

Science Journals Connector (OSTI)

We analyzed trends, interdecadal variability, and the quantification of the changes in the frequency of daily rainfall for two thresholds: 0.1†mm and percentile 75th, using high quality daily series from 52 st...

Olga C. Penalba; Federico A. Robledo

2010-02-01T23:59:59.000Z

72

A study of wind variability in the lower troposphere through power spectrum analysis at mesoscale frequencies  

E-Print Network [OSTI]

on the theoretical and practical application of the analysis method comes directly from this reference. B. Fundamental Assum tions of Power S ectrum Theor Consider a function of time X(t), such as wind speed, which is generated by a random process. Then the value... of the function X(t) at any particular point in time is a random variable. This random process may or may not have a Gaussian or normal distribution but it is a fundamental assumption (at least in the development of the theory) that the random process...

Cornett, John Sheldon

1966-01-01T23:59:59.000Z

73

Techniques for energy conservation in ac motor-driven systems. Final report  

SciTech Connect (OSTI)

Techniques for energy conservation of reducing losses in ac motor-driven systems proposed by the technical community in response to surging cost of energy are evaluated and compared. Report objectives are to provide better understanding of underlying principles and to evaluate technical and economic viability of these techniques for various applications. An important aspect considered is the impact on electric utility system in terms of harmonics, power factor of operation, and Electro-Magnetic Interference (EMI). The techniques evaluated are: NASA Power Factor Controller, a simple device for reducing power losses in lightly loaded ac motors; wanlass motor modification, a scheme of reconnecting motor windings with capacitors in series, with the intention of improving the motor efficiencies under all loading conditions; conventional variable frequency solid-state inverters which can control the speed of ac motors by producing adjustable frequency ac voltage, with a significant potential for energy conservation in pumps and air-handling systems; and other variable frequency drives and schemes including cycloconverters, slip-recovery scheme, Exxon Alternating Current Synthesizer, Venturini conversion technique, permanent magnet synchronous motors, and a device called the Phase-Liner. The impact of rapid growth in semiconductors and magnetic materials technologies is also considered.

Mohan, N.

1981-09-01T23:59:59.000Z

74

Hybrid phase shifted carrier modulation fed five-phase multilevel inverter for multiphase induction motor drive  

Science Journals Connector (OSTI)

This paper proposes an energy efficient modulation scheme suitable for multilevel inverter fed five-phase induction motor. Five-phase multilevel inverter provides good quality five-phase variable voltage and variable frequency supply to five-phase induction motor, which ensure reduced torque ripple and improved drive efficiency. This modulation inherits the features of fundamental frequency modulation and phase shifted carrier modulation in power conversion and resolves the contradiction between high frequency and accuracy in a digital control scheme. Base modulator and hybrid formulation control algorithms are realised with TMS320F2407 DSP processor and Xilinx XC95108 CPLD controllers. The performance studies with induction motor are evaluated in terms of power loss, weighted total harmonic distortion and torque ripple. Selected simulation and experiment results are reported to verify and validate the effectiveness of the proposed technique.

C. Govindaraju

2013-01-01T23:59:59.000Z

75

Motor current signature analysis method for diagnosing motor operated devices  

DOE Patents [OSTI]

A motor current noise signature analysis method and apparatus for remotely monitoring the operating characteristics of an electric motor-operated device such as a motor-operated valve. Frequency domain signal analysis techniques are applied to a conditioned motor current signal to distinctly identify various operating parameters of the motor driven device from the motor current signature. The signature may be recorded and compared with subsequent signatures to detect operating abnormalities and degradation of the device. This diagnostic method does not require special equipment to be installed on the motor-operated device, and the current sensing may be performed at remote control locations, e.g., where the motor-operated devices are used in accessible or hostile environments.

Haynes, Howard D. (Kingston, TN); Eissenberg, David M. (Oak Ridge, TN)

1990-01-01T23:59:59.000Z

76

Temporal Variability of Waves at the Proton Cyclotron Frequency Upstream from Mars: Implications for Mars Distant Hydrogen Exosphere  

E-Print Network [OSTI]

We report on the temporal variability of the occurrence of waves at the local proton cyclotron frequency upstream from the Martian bow shock from Mars Global Surveyor observations during the first aerobraking and science phasing orbit periods. Observations at high southern latitudes during minimum-to-mean solar activity show that the wave occurrence rate is significantly higher around perihelion southern summer solstice and lower around the same hemisphere's spring and autumn equinoxes. A similar trend is observed in the hydrogen (H) exospheric density profiles over the Martian South Pole obtained from a model including UV thermospheric heating effects. In spite of the complexity in the ion pick-up and plasma wave generation and evolution processes, these results support the idea that variations in the occurrence of waves could be used to study the temporal evolution of the distant Martian H corona and its coupling with the thermosphere at altitudes currently inaccessible to direct measurements.

Bertucci, Cesar; Chaufray, Jean-Yves; Gomez, Daniel; Mazelle, Christian; Delva, Magda; Modolo, Ronan; Gonzalez-Galindo, Francisco; Brain, David Andrew

2013-01-01T23:59:59.000Z

77

Low-frequency variability and heat transport in a low-order nonlinear coupled ocean-atmosphere model  

E-Print Network [OSTI]

We formulate and study a low-order nonlinear coupled ocean-atmosphere model with an emphasis on the impact of radiative and heat fluxes and of the frictional coupling between the two components. This model version extends a previous 24-variable version by adding a dynamical equation for the passive advection of temperature in the ocean, together with an energy balance model. The bifurcation analysis and the numerical integration of the model reveal the presence of low-frequency variability (LFV) concentrated on and near a long-periodic, attracting orbit. This orbit combines atmospheric and oceanic modes, and it arises for large values of the meridional gradient of radiative input and of frictional coupling. Chaotic behavior develops around this orbit as it loses its stability; this behavior is still dominated by the LFV on decadal and multi-decadal time scales that is typical of oceanic processes. Atmospheric diagnostics also reveals the presence of predominant low- and high-pressure zones, as well as of a subtropical jet; these features recall realistic climatological properties of the oceanic atmosphere. Finally, a predictability analysis is performed. Once the decadal-scale periodic orbits develop, the coupled system's short-term instabilities --- as measured by its Lyapunov exponents --- are drastically reduced, indicating the ocean's stabilizing role on the atmospheric dynamics. On decadal time scales, the recurrence of the solution in a certain region of the invariant subspace associated with slow modes displays some extended predictability, as reflected by the oscillatory behavior of the error for the atmospheric variables at long lead times.

Stťphane Vannitsem; Jonathan Demaeyer; Lesley De Cruz; Michael Ghil

2014-12-01T23:59:59.000Z

78

Use of Frequency Response Metrics to Assess the Planning and Operating Requirements for Reliable Integration of Variable Renewable Generation  

E-Print Network [OSTI]

and energy storage. Use of Frequency Response Metrics toand energy storage. xxix Use of Frequency Response Metricsfrequency control such as demand response and energy storage.

Eto, Joseph H.

2011-01-01T23:59:59.000Z

79

Building America Technology Solutions for New and Existing Homes: Replacement, Variable-Speed Motors for Furnaces, Syracuse, New York, (Fact Sheet)  

Broader source: Energy.gov [DOE]

In this project, the CARB team tested the Concept 3 replacement motors for residential furnaces in eight homes in and near Syracuse, New York, to test how these brushless, permanent magnet motors can use much less electricity than their permanent split capacitor predecessors.

80

A method for measuring the coordinates of an asynchronous motor in a frequency-controlled electric drive of mine excavator mechanisms  

Science Journals Connector (OSTI)

This paper deals with methods for calculating the electromagnetic torque of an asynchronous motor with a square-cage rotor of the electric drive of the bucket-lifting mechanism of ... description of electromagnet...

P. A. Osipov; A. L. Karyakin

2012-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

System and method for motor speed estimation of an electric motor  

SciTech Connect (OSTI)

A system and method for a motor management system includes a computer readable storage medium and a processing unit. The processing unit configured to determine a voltage value of a voltage input to an alternating current (AC) motor, determine a frequency value of at least one of a voltage input and a current input to the AC motor, determine a load value from the AC motor, and access a set of motor nameplate data, where the set of motor nameplate data includes a rated power, a rated speed, a rated frequency, and a rated voltage of the AC motor. The processing unit is also configured to estimate a motor speed based on the voltage value, the frequency value, the load value, and the set of nameplate data and also store the motor speed on the computer readable storage medium.

Lu, Bin (Kenosha, WI); Yan, Ting (Brookfield, WI); Luebke, Charles John (Sussex, WI); Sharma, Santosh Kumar (Viman Nagar, IN)

2012-06-19T23:59:59.000Z

82

Vibration and thermal analysis of 6 4 pole switched reluctance motor; -.  

E-Print Network [OSTI]

??Switched reluctance motors SRM rer gaining importance in the variable speed market due to their simple and rugged construction To designthe motor for higher performanceÖ (more)

Balamurugan, S

2014-01-01T23:59:59.000Z

83

Electric Motors  

Broader source: Energy.gov [DOE]

Section 313 of the Energy Independence and Security Act (EISA) of 2007 raised Federal minimum efficiency standards for general-purpose, single-speed, polyphase induction motors of 1 to 500 horsepower (hp). This new standard took effect in December 2010. The new minimum efficiency levels match FEMP's performance requirement for these motors.

84

Entangling the optical frequency comb: simultaneous generation of multiple 2x2 and 2x3 continuous-variable cluster states in a single optical parametric oscillator  

E-Print Network [OSTI]

We report on our research effort to generate large-scale multipartite optical-mode entanglement using as few physical resources as possible. We have previously shown that cluster- and GHZ-type N-partite continuous-variable entanglement can be obtained in an optical resonator that contains a suitably designed second-order nonlinear optical medium, pumped by at most O(N^2) fields. In this paper, we show that the frequency comb of such a resonator can be entangled into an arbitrary number of independent 2x2 and 2x3 continuous-variable cluster states by a single optical parametric oscillator pumped by just a few optical modes.

Hussain Zaidi; Nicolas C. Menicucci; Steven T. Flammia; Russell Bloomer; Matthew Pysher; Olivier Pfister

2010-10-25T23:59:59.000Z

85

Analysis on the energy efficiency of variable-frequency air conditioners (Hitachi models as an example) Jim Jr-Min Lin 2014.09.26  

E-Print Network [OSTI]

Analysis on the energy efficiency of variable-frequency air conditioners (Hitachi models (Max) Energy Efficiency @min load Energy Efficiency @Max load kW kW kW kW W/W W/W RAS-22NB 1.00 3.20 0 Efficiency @min load Energy Efficiency @Max load kW kW kW kW W/W W/W RAM-5FNS(B) - 12.5 - 2.91 - 4.3 RAM-6FNS

86

Theoretical model for evaluation of variable frequency drive for cooling water pumps in sea water based once through condenser cooling water systems  

Science Journals Connector (OSTI)

In sea water based once through cooling water system for power plants, sea water is pumped through the condenser and the return hot water is let back to sea. The cooling water pumps (CWP) in power plants generally operate at constant speed, pumping variable quantities of water depending on the tide level in the sea. The variable flow causes variation in condenser back pressure resulting in changes in the turbine cycle heat rate. If the pump speed is controlled using a variable frequency drive (VFD) to maintain design flow irrespective of the tide level, the CWP power consumption can be reduced compared to the case with constant speed CWP. However, the turbine cycle heat rate benefit that could have accrued at tide levels above the pre defined level (for fixing the CWP head) with constant speed CWP would have to be sacrificed. This paper provides a theoretical model with a typical case study to establish viability of providing VFD for \\{CWPs\\} in power plants with sea water based once through condenser cooling water system.

R. Harish; E.E. Subhramanyan; R. Madhavan; S. Vidyanand

2010-01-01T23:59:59.000Z

87

Submersible canned motor transfer pump  

DOE Patents [OSTI]

A transfer pump used in a waste tank for transferring high-level radioactive liquid waste from a waste tank and having a column assembly, a canned electric motor means, and an impeller assembly with an upper impeller and a lower impeller connected to a shaft of a rotor assembly. The column assembly locates a motor housing with the electric motor means adjacent to the impeller assembly which creates an hydraulic head, and which forces the liquid waste, into the motor housing to cool the electric motor means and to cool and/or lubricate the radial and thrust bearing assemblies. Hard-on-hard bearing surfaces of the bearing assemblies and a ring assembly between the upper impeller and electric motor means grind large particles in the liquid waste flow. Slots in the static bearing member of the radial bearing assemblies further grind down the solid waste particles so that only particles smaller than the clearances in the system can pass therethrough, thereby resisting damage to and the interruption of the operation of the transfer pump. The column assembly is modular so that sections can be easily assembled, disassembled and/or removed. A second embodiment employs a stator jacket which provides an alternate means for cooling the electric motor means and lubricating and/or cooling the bearing assemblies, and a third embodiment employs a variable level suction device which allows liquid waste to be drawn into the transfer pump from varying and discrete levels in the waste tank.

Guardiani, Richard F. (Ohio Township, Allegheny County, PA); Pollick, Richard D. (Sarver, PA); Nyilas, Charles P. (Monroeville, PA); Denmeade, Timothy J. (Lower Burrell, PA)

1997-01-01T23:59:59.000Z

88

Advanced Motors  

SciTech Connect (OSTI)

Project Summary Transportation energy usage is predicted to increase substantially by 2020. Hybrid vehicles and fuel cell powered vehicles are destined to become more prominent as fuel prices rise with the demand. Hybrid and fuel cell vehicle platforms are both dependent on high performance electric motors. Electric motors for transportation duty will require sizeable low-speed torque to accelerate the vehicle. As motor speed increases, the torque requirement decreases which results in a nearly constant power motor output. Interior permanent magnet synchronous motors (IPMSM) are well suited for this duty. , , These rotor geometries are configured in straight lines and semi circular arc shapes. These designs are of limited configurations because of the lack of availability of permanent magnets of any other shapes at present. We propose to fabricate rotors via a novel processing approach where we start with magnet powders and compact them into a net shape rotor in a single step. Using this approach, widely different rotor designs can be implemented for efficiency. The current limitation on magnet shape and thickness will be eliminated. This is accomplished by co-filling magnet and soft iron powders at specified locations in intricate shapes using specially designed dies and automatic powder filling station. The process fundamentals for accomplishing occurred under a previous Applied Technology Program titled, √?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬Ę√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?Motors and Generators for the 21st Century√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬Ę√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬Ě. New efficient motor designs that are not currently possible (or cost prohibitive) can be accomplished by this approach. Such an approach to motor fabrication opens up a new dimension in motor design. Feasibility Results We were able to optimize a IPMSM rotor to take advantage of the powder co-filling and DMC compaction processing methods. The minimum low speed torque requirement of 5 N-m can be met through an optimized design with magnet material having a Br capability of 0.2 T. This level of magnetic performance can be met with a variety of bonded magnet compositions. The torque ripple was found to drop significantly by using thinner magnet segments. The powder co-filling and subsequent compaction processing allow for thinner magnet structures to be formed. Torque ripple can be further reduced by using skewing and pole shaping techniques. The techniques can be incorporated into the rotor during the powder co-filling process.

Knoth, Edward A.; Chelluri, Bhanumathi; Schumaker, Edward J.

2012-12-14T23:59:59.000Z

89

Method and apparatus for large motor control  

DOE Patents [OSTI]

Apparatus and method for providing digital signal processing method for controlling the speed and phase of a motor involves inputting a reference signal having a frequency and relative phase indicative of a time based signal; modifying the reference signal to introduce a slew-rate limited portion of each cycle of the reference signal; inputting a feedback signal having a frequency and relative phase indicative of the operation of said motor; modifying the feedback signal to introduce a slew-rate limited portion of each cycle of the feedback signal; analyzing the modified reference signal and the modified feedback signal to determine the frequency of the modified reference signal and of the modified feedback signal and said relative phase between said modified reference signal and said modified feedback signal; and outputting control signals to the motor for adjusting said speed and phase of the motor based on the frequency determination and determination of the relative phase.

Rose, Chris R. (Santa Fe, NM); Nelson, Ronald O. (White Rock, NM)

2003-08-12T23:59:59.000Z

90

Quantum theory of optical temporal phase and instantaneous frequency. II. Continuous-time limit and state-variable approach to phase-locked loop design  

SciTech Connect (OSTI)

We consider the continuous-time version of our recently proposed quantum theory of optical temporal phase and instantaneous frequency [M. Tsang et al., Phys. Rev. A 78, 053820 (2008)]. Using a state-variable approach to estimation, we design homodyne phase-locked loops that can measure the temporal phase with quantum-limited accuracy. We show that postprocessing can further improve the estimation performance if delay is allowed in the estimation. We also investigate the fundamental uncertainties in the simultaneous estimation of harmonic-oscillator position and momentum via continuous optical phase measurements from the classical estimation theory perspective. In the case of delayed estimation, we find that the inferred uncertainty product can drop below that allowed by the Heisenberg uncertainty relation. Although this result seems counterintuitive, we argue that it does not violate any basic principle of quantum mechanics.

Tsang, Mankei; Shapiro, Jeffrey H. [Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Lloyd, Seth [Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2009-05-15T23:59:59.000Z

91

CNV amplitude as a neural correlate for stuttering frequency: A case report of acquired stuttering  

Science Journals Connector (OSTI)

Abstract A neural hallmark of developmental stuttering is abnormal articulatory programming. One of the neurophysiological substrates of articulatory preparation is the contingent negative variation (CNV). Unfortunately, CNV tasks are rarely performed in persons who stutter and mainly focus on the effect of task variation rather than on interindividual variation in stutter related variables. However, variations in motor programming seem to be related to variation in stuttering frequency. The current study presents a case report of acquired stuttering following stroke and stroke related surgery in the left superior temporal gyrus. A speech related CNV task was administered at four points in time with differences in stuttering severity and frequency. Unexpectedly, CNV amplitudes at electrode sites approximating bilateral motor and left inferior frontal gyrus appeared to be inversely proportional to stuttering frequency. The higher the stuttering frequency, the lower the activity for articulatory preparation. Thus, the amount of disturbance in motor programming seems to determine stuttering frequency. At right frontal electrodes, a relative increase in CNV amplitude was seen at the test session with most severe stuttering. Right frontal overactivation is cautiously suggested to be a compensation strategy. In conclusion, late CNV amplitude elicited by a relatively simple speech task seems to be able to provide an objective, neural correlate of stuttering frequency. The present case report supports the hypothesis that motor preparation has an important role in stuttering.

Sarah Vanhoutte; John Van Borsel; Marjan Cosyns; Katja Batens; Pieter van Mierlo; Dimitri Hemelsoet; Dirk Van Roost; Paul Corthals; Miet De Letter; Patrick Santens

2014-01-01T23:59:59.000Z

92

Analysis of variable-frequency currents superimposed on DC currents in asynchronous HVDC Links in stressing turbine-generator-exciter shafts  

SciTech Connect (OSTI)

Ripple currents on the DC side of both HVDC asynchronous and synchronous Links can excite in some circumstances onerous torsional vibrations in large steam generator shafts. The problem has assumed importance in recent months on account of the HVDC Link between Scotland and Northern Ireland going ahead, on account of the proposed Eire/Wales Link, because AC/DC/AC couplers are to be installed to interconnect the East and West European Grid Systems, and because resonances have been observed on machines in close proximity to AC/DCIAC couplers and HVDC Links. This paper discusses and analyses excitation of shaft torsional vibrations in steam turbine-generator-exciter shafts in close proximity to HVDC converter stations by variable-frequency ripple currents superimposed on DC currents in asynchronous Links. It presents technical knowledge not arranged for convenient reference heretofore in studying possible excitation of turbine-generator-v/ exciter shaft torsional vibrations by non-characteristic HVDC converter harmonic currents if a machine should be considered to be at risk. Shaft torques in multi-machine networks are evaluated by proportioning HVDC Link disturbance currents to each machine at risk using system network data, generator data and fault analysis data considering frequency dependence of the system parameters. This scaling factor is calculated for different scenarios of system operation and load. Equivalent circuits for the synchronous generator are employed appropriately to correlate HVDC Link disturbance current impressed on the generator stator with s state torque excitation from which magnitude of turbine-generator-exciter shaft torque is deduced.

Hammons, T.J.; Bremner, J.J. [Univ. of Glasgow (United Kingdom)] [Univ. of Glasgow (United Kingdom)

1995-03-01T23:59:59.000Z

93

Nonsensor control of centrifugal water pump with asynchronous electric-drive motor based on extended Kalman filter  

Science Journals Connector (OSTI)

An approach is described for estimating the pumpís variables based only on measuring the motorís electrical variables. The method is based on extended Kalman filter estimation of the pumpís shaft power and vel...

O. I. Kiselichnik; M. Bodson

2011-02-01T23:59:59.000Z

94

Sensorless Control of a Stepper Motor Based on Higher Order Sliding Modes  

E-Print Network [OSTI]

laws for the stepper motor which rely on measurements of electrical variables only. One can find work estimates of the velocity and the position of the stepper motor and uses electric variables measurementsSensorless Control of a Stepper Motor Based on Higher Order Sliding Modes C. Fiter , T. Floquet , J

Boyer, Edmond

95

Tecnolog√≠as del Motor  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

del Motor del Motor El Tiempo de apertura y Levantamiento de V√°lvulas Variable (VVT&L) Motor con V√°lvulas de Tiempo y Elevaci√≥n Variable Tambi√©n llamado activaci√≥n variable de v√°lvulas (AVV), elevaci√≥n variable y tiempo variable y control electr√≥nico de elevaci√≥n (VTEC¬ģ). Las v√°lvulas controlan el flujo de aire y combustible de los cilindros y los expulsa fuera de ellos. El momento y el tiempo que las v√°lvulas permanecen abiertas y c√≥mo se mueven o se elevan, ambos afectan la eficiencia del motor. Los ajustes en el tiempo y elevaci√≥n son diferentes para motores de baja y alta velocidad. De cualquier manera en los dise√Īos tradicionales se usan tiempos y elevaciones "arregladas" lo cual compromete los valores √≥ptimos entre las velocidades altas y bajas. Los sistemas VVT&L alteran el tiempo y

96

Sensorless Speed Control of Permanent Magnet-Assisted Synchronous Reluctance Motor (PMa-SynRM)  

E-Print Network [OSTI]

An interesting alternative for today's high efficiency variable speed drives is the Permanent Magnet-Assisted Synchronous Reluctance Motor drive, which belongs to the family of brushless synchronous AC motor drives. Generally, the reluctance torque...

Chakali, Anil K.

2011-02-22T23:59:59.000Z

97

Farm Motorization, Consumption and Prices of Motor Fuels  

Science Journals Connector (OSTI)

... Development of Farm Motorization and Consumption and Prices of Motor ... of Motor Fuels in Member Countries is the title of a publication recently issued by the Organization for ...

1963-12-21T23:59:59.000Z

98

Method and apparatus for generating motor current spectra to enhance motor system fault detection  

DOE Patents [OSTI]

A method and circuitry are disclosed for sampling periodic amplitude modulations in a nonstationary periodic carrier wave to determine frequencies in the amplitude modulations. The method and circuit are described in terms of an improved motor current signature analysis. The method insures that the sampled data set contains an exact whole number of carrier wave cycles by defining the rate at which samples of motor current data are collected. The circuitry insures that a sampled data set containing stationary carrier waves is recreated from the analog motor current signal containing nonstationary carrier waves by conditioning the actual sampling rate to adjust with the frequency variations in the carrier wave. After the sampled data is transformed to the frequency domain via the Discrete Fourier Transform, the frequency distribution in the discrete spectra of those components due to the carrier wave and its harmonics will be minimized so that signals of interest are more easily analyzed. 29 figs.

Linehan, D.J.; Bunch, S.L.; Lyster, C.T.

1995-10-24T23:59:59.000Z

99

Method and apparatus for generating motor current spectra to enhance motor system fault detection  

DOE Patents [OSTI]

A method and circuitry for sampling periodic amplitude modulations in a nonstationary periodic carrier wave to determine frequencies in the amplitude modulations. The method and circuit are described in terms of an improved motor current signature analysis. The method insures that the sampled data set contains an exact whole number of carrier wave cycles by defining the rate at which samples of motor current data are collected. The circuitry insures that a sampled data set containing stationary carrier waves is recreated from the analog motor current signal containing nonstationary carrier waves by conditioning the actual sampling rate to adjust with the frequency variations in the carrier wave. After the sampled data is transformed to the frequency domain via the Discrete Fourier Transform, the frequency distribution in the discrete spectra of those components due to the carrier wave and its harmonics will be minimized so that signals of interest are more easily analyzed.

Linehan, Daniel J. (Knoxville, TN); Bunch, Stanley L. (Oak Ridge, TN); Lyster, Carl T. (Knoxville, TN)

1995-01-01T23:59:59.000Z

100

Analysis of field-oriented controlled induction motor drives under sensor faults and an overview of sensorless schemes  

Science Journals Connector (OSTI)

Abstract To obtain high dynamic performance on induction motor drives (IMD), variable voltage and variable frequency operation has to be performed by measuring speed of rotation and stator currents through sensors and fed back them to the controllers. When the sensors are undergone a fault, the stability of control system, may be designed for an industrial process, is disturbed. This paper studies the negative effects on a 12.5 hp induction motor drives when the field oriented control system is subjected to sensor faults. To illustrate the importance of this study mine hoist load diagram is considered as shaft load of the tested machine. The methods to recover the system from sensor faults are discussed. In addition, the various speed sensorless schemes are reviewed comprehensively.

D Arun Dominic; Thanga Raj Chelliah

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Development of a Switched Reluctance Motor made of Permendur  

Science Journals Connector (OSTI)

A switched reluctance (SR) motor consists of stator and rotor cores, and windings. Both the stator and rotor have salient poles. The stator has concentrated windings on each salient pole. On the other hand, the rotor has no windings and no permanent magnets. Therefore, the SR motor is a low cost, extremely robust, and wide-range variable-speed motor. The performance of the SR motor greatly depends on magnetic properties of core material since it consists of only iron cores and windings. This paper presents the development of a novel SR motor made of permendur which has extremely high saturation flux density and very low core loss. Two types of SR motors, one is made of conventional non-oriented Si steel, the other is made of permendur, are compared by simulation and experiment. It is demonstrated that the torque of the SR motor made of permendur is greater than that of the conventional Si steel by 20%.

Y Hasegawa; K Nakamura; O Ichinokura

2011-01-01T23:59:59.000Z

102

Electric Wheel Hub Motor  

Science Journals Connector (OSTI)

Wheel hub motors are an innovative drive concept for electric vehicles where the electric machine and, in some cases, the...

Dipl.-Ing. Michael GrŲninger; Dipl.-Ing. Felix HorchÖ

2012-02-01T23:59:59.000Z

103

Quantum motor and future  

E-Print Network [OSTI]

In a popular language, the possibilities of the Casimir expulsion effect are presented, which can be the basis of quantum motors. Such motors can be in the form of a special multilayer thin film with periodic and complex nanosized structures. Quantum motors of the type of the Casimir platforms can be the base of transportation, energy and many other systems in the future.

Fateev, Evgeny G

2013-01-01T23:59:59.000Z

104

Quantum motor and future  

E-Print Network [OSTI]

In a popular language, the possibilities of the Casimir expulsion effect are presented, which can be the basis of quantum motors. Such motors can be in the form of a special multilayer thin film with periodic and complex nanosized structures. Quantum motors of the type of the Casimir platforms can be the base of transportation, energy and many other systems in the future.

Evgeny G. Fateev

2013-01-20T23:59:59.000Z

105

Kinesin Motor Mechanics: Binding, Stepping, Tracking, Gating, and Limping  

E-Print Network [OSTI]

Department of Biological Sciences and Department of Applied Physics, Stanford University, Stanford state of kinesin motor mechanics. Nearly a generation has passed since the discovery of the motor named acquisition rate was 1 kHz (after anti-alias filtering at the Nyquist frequency, 0.5 kHz), and records were

Block, Steven

106

A Novel Fuzzy Controller for Switched Reluctance Motor Drive  

Science Journals Connector (OSTI)

There are serious nonlinear, variable strongly coupling characteristic in switched reluctance motor (SRM),and its electromagnetic relationship is hard to analyze. According to the nonlinear inductance model of SRM,a control system for SRM is carried ...

Yiwang Wang

2009-05-01T23:59:59.000Z

107

Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive  

DOE Patents [OSTI]

A scheme for optimizing the efficiency of an AC motor drive operated in a pulse-width-modulated mode provides that the modulation frequency of the power furnished to the motor is a function of commanded motor torque and is higher at lower torque requirements than at higher torque requirements. 6 figs.

Konrad, C.E.; Boothe, R.W.

1996-01-23T23:59:59.000Z

108

Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive  

DOE Patents [OSTI]

A scheme for optimizing the efficiency of an AC motor drive operated in a pulse-width-modulated mode provides that the modulation frequency of the power furnished to the motor is a function of commanded motor torque and is higher at lower torque requirements than at higher torque requirements.

Konrad, Charles E. (Roanoke, VA); Boothe, Richard W. (Roanoke, VA)

1996-01-01T23:59:59.000Z

109

Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive  

DOE Patents [OSTI]

A scheme for optimizing the efficiency of an AC motor drive operated in a pulse-width-modulated mode provides that the modulation frequency of the power furnished to the motor is a function of commanded motor torque and is higher at lower torque requirements than at higher torque requirements.

Konrad, Charles E. (Roanoke, VA); Boothe, Richard W. (Roanoke, VA)

1994-01-01T23:59:59.000Z

110

A motor drive control system for the Lidar Polarimeter  

E-Print Network [OSTI]

and Quantitative Account Gear-Train Servo Error Types. IV. DC VARIABLE SPEED MOTOR DRIVE DESIGN CONSIDERATIONS AND RFALIZATION. Introduction. 27 29 30 30 34 34 Design Consideration. The DC Power Amplifier. System Operation. Scan System Alignment... and Quantitative Account Gear-Train Servo Error Types. IV. DC VARIABLE SPEED MOTOR DRIVE DESIGN CONSIDERATIONS AND RFALIZATION. Introduction. 27 29 30 30 34 34 Design Consideration. The DC Power Amplifier. System Operation. Scan System Alignment...

Leung, Waiming

2012-06-07T23:59:59.000Z

111

Comparative Biochemistry and Physiology Part B 127 (2000) 533550 The effects of 5-HT on sensory, central and motor neurons  

E-Print Network [OSTI]

­abdominal superficial flexor motor neurons­muscles' circuit. Our studies address the role of 5-HT in altering (1 from the ventral nerve cord resulting in an increase in the firing frequency of the motor neurons. Also

Cooper, Robin L.

112

Harmony Optimization of Physical Design and Control Strategy of Switched Reluctance Motor  

Science Journals Connector (OSTI)

Vibration and acoustic noise are the important reasons for switched reluctance motor to be unacceptable in variable speed drive market. To optimize the physical structure of the motor and to choose the appropriate control strategies are the two conventional ... Keywords: control strategy, switched reluctance motor, physical design, harmony optimization

Jie Li; Boya Sun; Shurui Fan; Lin He

2009-11-01T23:59:59.000Z

113

Hybrid vehicle motor alignment  

DOE Patents [OSTI]

A rotor of an electric motor for a motor vehicle is aligned to an axis of rotation for a crankshaft of an internal combustion engine having an internal combustion engine and an electric motor. A locator is provided on the crankshaft, a piloting tool is located radially by the first locator to the crankshaft. A stator of the electric motor is aligned to a second locator provided on the piloting tool. The stator is secured to the engine block. The rotor is aligned to the crankshaft and secured thereto.

Levin, Michael Benjamin (Ann Arbor, MI)

2001-07-03T23:59:59.000Z

114

Traffic of Molecular Motors  

E-Print Network [OSTI]

Molecular motors perform active movements along cytoskeletal filaments and drive the traffic of organelles and other cargo particles in cells. In contrast to the macroscopic traffic of cars, however, the traffic of molecular motors is characterized by a finite walking distance (or run length) after which a motor unbinds from the filament along which it moves. Unbound motors perform Brownian motion in the surrounding aqueous solution until they rebind to a filament. We use variants of driven lattice gas models to describe the interplay of their active movements, the unbound diffusion, and the binding/unbinding dynamics. If the motor concentration is large, motor-motor interactions become important and lead to a variety of cooperative traffic phenomena such as traffic jams on the filaments, boundary-induced phase transitions, and spontaneous symmetry breaking in systems with two species of motors. If the filament is surrounded by a large reservoir of motors, the jam length, i.e., the extension of the traffic jams is of the order of the walking distance. Much longer jams can be found in confined geometries such as tube-like compartments.

Stefan Klumpp; Melanie J. I. MŁller; Reinhard Lipowsky

2005-12-06T23:59:59.000Z

115

Motor current signature analysis for determining operational readiness of motor-operated valves (MOVs)  

SciTech Connect (OSTI)

Motor current signature analysis (MCSA) is a novel diagnostic process for condition monitoring of electric-motor-driven mechanical equipment (e.g., pumps, motor-operated valves, compressors, and processing machinery). The MCSA process identifies, characterizes, and trends over time the instantaneous load variations of mechanical equipment in order to diagnose changes in the condition of the equipment (e.g., due to degradation or service wear), which, if allowed to continue, may lead to failure. It monitors the instantaneous variations (noise content) in the electric current flowing through the power leads to the electric motor that drives the equipment. The motor itself thereby acts as a transducer, sensing both large and small, long-term and rapid, mechanical load variations and converting them to variations in the induced current generated in the motor windings. This motor current noise signature is detected, amplified, and further processed as needed to examine its time domain and frequency domain (spectral) characteristics. The operational principles of MCSA and the nonintrusive data collection apparatus and procedure used with MOVs will be described. Data collected from MOVs in both laboratory and in-plant environments will also be shown to illustrate the ability of MCSA to ''see'' the detailed inner workings of the valve and operator and thus to detect degraded performance at an incipient stage. (Set of 18 vugraphs)

Kryter, R.C.; Haynes, H.D.

1987-01-01T23:59:59.000Z

116

Modeling and Experimental Investigation of a Variable Speed Drive Water Source Heat Pump  

Science Journals Connector (OSTI)

Accurate variable speed characteristics are needed for water source heat pumps (WSHP) to design variable speed controls to adjust refrigerant flow rates in heat pumps and air conditioners. The system capacity can then be regulated to match the compressor loads to the heating or cooling needs to improve the energy efficiency and lower energy costs. The motor and compression characteristics of WSHP were modeled to include the coupling between the motor speed and the torque characteristics and compression characteristics. An analytical model is given for a variable speed hermetic scroll compressor that describes various factors, such as the drive frequency, suction pressure, and discharge pressure as a function of the compressor speed. The model was validated experimentally using R22 and \\{R134a\\} in an experimental WSHP with variable speed control using frequency conversion. The results show that the analytical model properly describes the variable speed characteristics and provides a control strategy for adjusting the capacity of scroll compressors to match the heat pump or air conditioner operating conditions.

Zhifang Xue; Lin Shi

2010-01-01T23:59:59.000Z

117

Advanced Manufacturing Office: Motor Systems  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Motor Systems to Motor Systems to someone by E-mail Share Advanced Manufacturing Office: Motor Systems on Facebook Tweet about Advanced Manufacturing Office: Motor Systems on Twitter Bookmark Advanced Manufacturing Office: Motor Systems on Google Bookmark Advanced Manufacturing Office: Motor Systems on Delicious Rank Advanced Manufacturing Office: Motor Systems on Digg Find More places to share Advanced Manufacturing Office: Motor Systems on AddThis.com... Quick Links Energy Resource Center Technical Publications by Energy System Energy-Efficient Technologies Incentives & Resources by Zip Code Better Plants Superior Energy Performance Contacts Motor Systems Photo of Man Checking Motor Performance Motor-driven equipment accounts for 54% of manufacturing electricity use. Dramatic energy and cost savings can be achieved in motor systems by

118

Ontario Hydro Motor Efficiency Study  

E-Print Network [OSTI]

Electric motors consume more than one-half of the electrical energy produced by Ontario Hydro. In the residential sector, the major motor load is for refrigerators and freezers while packaged equipment dominate the motor load in the commercial...

Dautovich, D. R.

1980-01-01T23:59:59.000Z

119

Motor torque compensation of an induction electric motor by adjusting a slip command during periods of supposed change in motor temperature  

DOE Patents [OSTI]

The present invention maintains constant torque in an inverter driven AC induction motor during variations in rotor temperature. It is known that the torque output of a given AC induction motor is dependent upon rotor temperature. At rotor temperatures higher than the nominal operating condition the rotor impedance increases, reducing the rotor current and motor torque. In a similar fashion, the rotor impedance is reduced resulting in increased rotor current and motor torque when the rotor temperature is lower than the nominal operating condition. The present invention monitors the bus current from the DC supply to the inverter and adjusts the slip frequency of the inverter drive to maintain a constant motor torque. This adjustment is based upon whether predetermined conditions implying increased rotor temperature or decreased rotor temperature exist for longer that a predetermined interval of time.

Kelledes, William L. (Brighton, MI); St. John, Don K. (Livonia, MI)

1992-01-01T23:59:59.000Z

120

Overheating of Electric Motors  

Science Journals Connector (OSTI)

... due to dirt or other foreign matter obstructing the ventilating pipes, ducts and passages of motors. Mention is made of the lagging effect which waste materials may have on the ... . Mention is made of the lagging effect which waste materials may have on the motor casing, and useful suggestions are given for the improvement and maintenance of ventilation. Since ...

1942-09-05T23:59:59.000Z

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Thermocouple Electric Motors  

Science Journals Connector (OSTI)

... voltage drop of normal brush gear being too high, mercury commutation was tried. This motor ran well, but considerable splashing of mercury occurred which was unsafe from the health ... from the health angle. A totally enclosed design was adopted (Fig. 1). The motor was powered by a single massive thermocouple of iron-constantan.

J. E. CRAWFORD STRINGER

1962-09-08T23:59:59.000Z

122

motor | OpenEI  

Open Energy Info (EERE)

0 0 Varnish cache server Browse Upload data GDR 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142279950 Varnish cache server motor Dataset Summary Description The data included in this submission is United States Department of Transportation (DOT) data up to 1995. The data includes motor-fuel gallonage taxes 1950-1995, motor-fuel use 1919-1995, private and commercial highway use of special fuels, by state 1949-1995, highway use of gasoline, by state 1949-1995, gasohol sales by state, 1980-1992, and estimated use of gasohol, 1993-1995. The data is presented in .xlsx format. Source DOT Date Released Unknown Date Updated Unknown Keywords DOT Fuel highway motor vehicle Data application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon Motor-fuel gallonage taxes 1950-1995 (xlsx, 37.3 KiB)

123

Electric Motors and Critical Materials  

Broader source: Energy.gov (indexed) [DOE]

EV, materials, and motor designers is missing * Achieving high volume July 24, 2012 Electric Motors and Critical Materials Breakout Session 2 - Discussion of Breakthroughs and...

124

General Motors | Open Energy Information  

Open Energy Info (EERE)

General Motors Place: Detroit, MI Website: http:www.generalmotors.com References: General Motors1 Information About Partnership with NREL Partnership with NREL Yes Partnership...

125

System and method for motor parameter estimation  

DOE Patents [OSTI]

A system and method for determining unknown values of certain motor parameters includes a motor input device connectable to an electric motor having associated therewith values for known motor parameters and an unknown value of at least one motor parameter. The motor input device includes a processing unit that receives a first input from the electric motor comprising values for the known motor parameters for the electric motor and receive a second input comprising motor data on a plurality of reference motors, including values for motor parameters corresponding to the known motor parameters of the electric motor and values for motor parameters corresponding to the at least one unknown motor parameter value of the electric motor. The processor determines the unknown value of the at least one motor parameter from the first input and the second input and determines a motor management strategy for the electric motor based thereon.

Luhrs, Bin; Yan, Ting

2014-03-18T23:59:59.000Z

126

Implementing Motor Decision Plans  

E-Print Network [OSTI]

Implementing Motor Decision Plans R. Neal Elliott, Ph.D., P.E., Senior Associate American Council for an Energy-Efficient Economy (ACEEE), Washington, DC Abstract The first step to reducing energy costs and increasing reliability in motors... is chosen with limited regard to the short or long-tenn cost. This paper discusses how to develop a plan appropriate to the needs of a particular facility. Introduction In most cases, the opportunity to install a more efficient motor isO available...

Elliott, R. N.

127

6 - Control systems for AC variable speed drives  

Science Journals Connector (OSTI)

Publisher Summary This chapter explores the control system, embodied in the control circuits. The simplest method of providing auxiliary power to the converter control circuits is from an auxiliary transformer connected to the mains. The primary need for current feedback in general purpose variable speed drives (VSDs) is inverter switching device protection. Various disadvantages of the vector controlled AC drive as compared to a DC drive are discussed in the chapter. The strategy of an AC vector control drive is to calculate the individual current vectors to eventually enable separate control of the flux current and the torque current under all speed and load conditions. The power circuit for a vector converter is almost identical to that used by a variable voltage variable frequency (VVVF) drive. High accuracy motor current feedback is also necessary to provide control of motor torque. DC bus current feedback is suitable for switching device protection and current limiting in most AC VSDs. Analog speed transducers are increasingly being replaced by digital devices, which are more compatible with modern digital control systems.

Malcolm Barnes

2003-01-01T23:59:59.000Z

128

Justification for Energy Efficient Motors  

E-Print Network [OSTI]

This paper presents the results of a study of Energy Efficient (or EE) motors in NEMA frame sizes, (1-200 HP). It examines the economics of using EE motors for new motor requirements, as replacements for motors - instead of rewinding...

Buschart, R. J.

1981-01-01T23:59:59.000Z

129

Electric Motor Management Scheme  

Science Journals Connector (OSTI)

The paper explores traditional repair situations and draws a comparison with a structured scheme, which commences with an audit of all stock and plant motors held by a typical user. A nominated repairer is sel...

Richard Blandford

2000-01-01T23:59:59.000Z

130

MotorWeek  

ScienceCinema (OSTI)

In 2008, PBS's MotorWeek, television's original automotive magazine, visited Argonne's Transportation Technology R&D Center "to learn what it really takes to make clean power sources a viable reality."

None

2013-04-19T23:59:59.000Z

131

Energy Efficient Motors  

E-Print Network [OSTI]

.. " ENERGY EFFICIENT MOTORS W. R. Hoffmeyer General Electric Company Fort Wayne, Indiana ABSTRACT Efficiency is only one aspect of motor per formance. This paper discusses how efficiency is influenced by such factors as horsepower rating... and in cost~ saVings, especially if the power company imposes a penalty for low power factor. Increasing efficiency has a direct effect on operating cost. Increasing power factor has only an indirect and less profound effect. This was recognized by ASHRAE...

Hoffmeyer, W.

1982-01-01T23:59:59.000Z

132

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Movement is fundamental to life. It takes place even at the cellular level where cargo is continually being transported by motor proteins. These tiny machines convert the energy gained from hydrolysing ATP into a series of small conformational changes that allow them to literally "walk" along microscopic tracks. Motor proteins (in the kinesin and myosin families) have been extensively studied by x-ray crystallography, but until recently there was little molecular structural information for dyneins, another type of motor protein. A group from the University of California, San Francisco, working at ALS Beamline 8.3.1 has reported the 6-√Ö-resolution structure of the motor domain of dynein in yeast. It reveals details of the ring-shaped motor as well as a new, unanticipated feature called the buttress that may play an important role in dynein's mechanical cycle.

133

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Movement is fundamental to life. It takes place even at the cellular level where cargo is continually being transported by motor proteins. These tiny machines convert the energy gained from hydrolysing ATP into a series of small conformational changes that allow them to literally "walk" along microscopic tracks. Motor proteins (in the kinesin and myosin families) have been extensively studied by x-ray crystallography, but until recently there was little molecular structural information for dyneins, another type of motor protein. A group from the University of California, San Francisco, working at ALS Beamline 8.3.1 has reported the 6-√Ö-resolution structure of the motor domain of dynein in yeast. It reveals details of the ring-shaped motor as well as a new, unanticipated feature called the buttress that may play an important role in dynein's mechanical cycle.

134

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Movement is fundamental to life. It takes place even at the cellular level where cargo is continually being transported by motor proteins. These tiny machines convert the energy gained from hydrolysing ATP into a series of small conformational changes that allow them to literally "walk" along microscopic tracks. Motor proteins (in the kinesin and myosin families) have been extensively studied by x-ray crystallography, but until recently there was little molecular structural information for dyneins, another type of motor protein. A group from the University of California, San Francisco, working at ALS Beamline 8.3.1 has reported the 6-√Ö-resolution structure of the motor domain of dynein in yeast. It reveals details of the ring-shaped motor as well as a new, unanticipated feature called the buttress that may play an important role in dynein's mechanical cycle.

135

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Dynein Motor Domain Shows Ring-Shaped Motor, Buttress Print Movement is fundamental to life. It takes place even at the cellular level where cargo is continually being transported by motor proteins. These tiny machines convert the energy gained from hydrolysing ATP into a series of small conformational changes that allow them to literally "walk" along microscopic tracks. Motor proteins (in the kinesin and myosin families) have been extensively studied by x-ray crystallography, but until recently there was little molecular structural information for dyneins, another type of motor protein. A group from the University of California, San Francisco, working at ALS Beamline 8.3.1 has reported the 6-√Ö-resolution structure of the motor domain of dynein in yeast. It reveals details of the ring-shaped motor as well as a new, unanticipated feature called the buttress that may play an important role in dynein's mechanical cycle.

136

EFFICIENCY OF ELECTRIC MOTORS  

E-Print Network [OSTI]

Effective on the issue date of this bulletin, the references section (1.4) of NIST Handbook 150-10, Efficiency of Electric Motors, 2007 Edition, is revised as specified in 1) and 2) below. 1) Reference 1.4 d): IEEE Standard 112-1996, Test Procedure for Polyphase Induction Motors and Generators, Test Method B, and the correction to the calculation at item (28) in section 10.2 Form B-Test Method B issued by IEEE on January 20, 1998, is replaced with: IEEE 112-2004, IEEE Standard Test Procedure for Polyphase Induction Motors and Generators, Test Method B, and the correction to the calculation at item (28) in section 10.2 Form B-Test Method B issued by IEEE on November 4, 2004. 2) Reference 1.4 f): NEMA Standards Publication MG 1-1993, Motors and Generators, with Revisions 1, 2, 3, and 4, is replaced with: NEMA MG 1-2006, Motors and Generators, plus Revision 1. There are no significant technical differences in these references. The changes were made to be consistent with current industry practices and in support of the Department of Energy proposed rule on small electric motors as designated in 10 CFR Part 431, [Docket No. EEREĖ2008ĖBTĖTPĖ0008], RIN 1904ĖAB71, Energy Conservation Program: Test Procedures for Electric Motors. This bulletin should be inserted into NIST Handbook 150-10 (EEM Program-Specific Handbook) until the next edition of the handbook is released, at which time the reference changes will be incorporated into the handbook. This bulletin has also been posted to the NVLAP web site at

Carroll S. Brickenkamp; Lawrence I. Knab; Carlos M. Gutierrez

2009-01-01T23:59:59.000Z

137

Electric Motor Thermal Management | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Merit Review and Peer Evaluation ape030bennion2011o.pdf More Documents & Publications Motor Thermal Control Electric Motor Thermal Management Electric Motor Thermal Management...

138

MotorMaster+ International Fact Sheet  

Broader source: Energy.gov [DOE]

This fact sheet describes how industrial plants can improve their motor system performance for a broader range of motors with AMO's MotorMaster+ International software tool.

139

Monitoring method and apparatus using high-frequency carrier  

DOE Patents [OSTI]

A method and apparatus for monitoring an electrical-motor-driven device by injecting a high frequency carrier signal onto the power line current. The method is accomplished by injecting a high frequency carrier signal onto an AC power line current. The AC power line current supplies the electrical-motor-driven device with electrical energy. As a result, electrical and mechanical characteristics of the electrical-motor-driven device modulate the high frequency carrier signal and the AC power line current. The high frequency carrier signal is then monitored, conditioned and demodulated. Finally, the modulated high frequency carrier signal is analyzed to ascertain the operating condition of the electrical-motor-driven device. 6 figs.

Haynes, H.D.

1996-04-30T23:59:59.000Z

140

Efficient, Inexpensive Motors: A New Trend in The Motors Market  

E-Print Network [OSTI]

EFFICIENT, INEXPENSIVE MOTORS: A NEW TREND IN THE MOTORS MARKET Ronald G. Wroblewski, P.E. Trainer and Consultant ABSTRACT The Consortiwn for Energy Efficiency (CEE) has established criteria for premium-efficiency motors above the EPACf... standard. CEE has set a wrifonn efficiency benchmark that all market players (manufacturers, utilities, and end-users) can use. Some end-users however, have been reluctant to specify these motors because they think they are too expensive...

Wroblewksi, R. G.

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Rotor reference frame models of a multiloop 2-phase motor drive in brushless DC and microstepping modes  

SciTech Connect (OSTI)

This paper describes non-linear models of a 2-phase permanent magnet synchronous motor drive in brushless DC and microstepping modes. The models account for everything from the main power bus up to and including the mechanical load and velocity feedback loop. In particular, the models include the power electronics for each phase complete with their internal feedback loops. Classical state space averaged power electronics models are transformed to the rotor reference frame along with the usual electromechanical variables. Since SPICE linearizes the rotor reference frame model about shaft velocity, instead of shaft angle, frequency domain methods apply. The frequency domain analysis detects unstable interactions between torque angle and deliberate feedback within the drives. Time domain simulations using stator reference frame models confirm the results. All models are SPICE-compatible but were developed on Cadence`s Analog Workbench.

Chen, J.E. [Lockheed Missiles and Space Co. Inc., Sunnyvale, CA (United States)

1995-12-31T23:59:59.000Z

142

motor vehicles | OpenEI  

Open Energy Info (EERE)

motor vehicles motor vehicles Dataset Summary Description The data included in this submission is United States Department of Transportation (DOT) data on rates and revenue statistics up to 1995. The data includes state motor-fuel tax receipts, 1919-1995, state motor fuel taxes and related receipts, 1950-1995, and state and federal motor fuel tax rates, 1919-1995 The data is presented in .xlsx format. Source DOT Date Released Unknown Date Updated Unknown Keywords DOT highway motor vehicles rates revenues Data application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon State motor-fuel tax receipts, 1919-1995 (xlsx, 13.8 KiB) application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon State motor fuel taxes and related receipts, 1950-1995 (xlsx, 78.5 KiB)

143

Electric motor model repair specifications  

SciTech Connect (OSTI)

These model repair specifications list the minimum requirements for repair and overhaul of polyphase AC squireel cage induction motors. All power ranges, voltages, and speeds of squirrel cage motors are covered.

NONE

1995-08-01T23:59:59.000Z

144

Motor Systems | Department of Energy  

Energy Savers [EERE]

Smooth the Way to Savings of 700,000 at Chevron Refinery Optimizing Electric Motor Systems at a Corporate Campus Facility Motors Tip Sheets When to Purchase Premium Efficiency...

145

Motor Energy Savings Potential Report  

Broader source: Energy.gov [DOE]

This report describes the current state of motor technology and estimates opportunities for energy savings through application of more advanced technologies in a variety of residential and commercial end uses. The objectives of this report were to characterize the state and type of motor technologies used in residential and commercial appliances and equipment and to identify opportunities to reduce the energy consumption of electric motor-driven systems in the residential and commercial sectors through the use of advanced motor technologies.

146

Alcohol and Motor Accidents  

Science Journals Connector (OSTI)

... averaged 18 a day and the injuries more than 600. Half the deaths were among pedestrians and a fifth among pedal cyclists, while drivers of motor vehicles and their passengers ... vehicles and their passengers had only a third to a fourth as many accidents as pedestrians. Although the data of the Ministry of Transport indicate that only 1 in 80 ...

1937-01-30T23:59:59.000Z

147

A complete and novel sensorless method for rotor position sensing in switched reluctance motor drives  

Science Journals Connector (OSTI)

This paper presents a complete and novel method which is designed to detect the rotor position at standstill and also low speeds in switched reluctance motor. The method applies a high frequency sine wave signal to the three successive stator pole windings ... Keywords: indirect rotor, position sensing in SRM, sensorless operation of SRM, switch reluctance motor

E. Afjei; M. M. Nezamabadi; A. Javeh

2005-07-01T23:59:59.000Z

148

Motor technology for mining applications advances  

SciTech Connect (OSTI)

AC motors are steadily replacing DC motors in mining and mineral processing equipment, requiring less maintenance. The permanent magnet rotor, or the synchronous motor, has enabled Blador to introduce a line of cooling tower motors. Synchronous motors are soon likely to take over from the induction motor. 1 photo.

Fiscor, S.

2009-08-15T23:59:59.000Z

149

Solutions for Interharmonics in Variable Speed Drives for LNG Plants:.  

E-Print Network [OSTI]

??Variable speed drives can cause components of any frequency known as interharmonics. Large variable speed drives in the order of tens of megawatts can replaceÖ (more)

Verhulst, M.P.A.

2011-01-01T23:59:59.000Z

150

Retail Motor Gasoline Prices*  

Gasoline and Diesel Fuel Update (EIA)

6 6 Notes: Gasoline pump prices have backed down from the high prices experienced last summer and fall. The retail price for regular motor gasoline fell 11 cents per gallon from September to December. However, with crude oil prices rebounding somewhat from their December lows combined with lower than normal stock levels, we project that prices at the pump will rise modestly as the 2001 driving season begins this spring. For the summer of 2001, we expect only a little difference from the average price of $1.50 per gallon seen during the previous driving season, as motor gasoline stocks going into the driving season are projected to be slightly less than they were last year. The situation of relatively low inventories for gasoline could set the stage for some regional imbalances in supply that could once again

151

Motor gasolines, summer 1979  

SciTech Connect (OSTI)

Analytical data for 2401 samples of motor gasoline, from service stations throughout the country, were collected and analyzed under agreement between the Bartlesville Energy Technology Center and the American Petroleum Institute. The samples represent the products of 48 companies, large and small, which manufacture and supply gasoline. These data are tabulated by groups according to brands (unlabeled) and grades for 17 marketing areas and districts into which the country is divided. A map included in this report, shows marketing areas, districts and sampling locations. The report also includes charts indicating the trends of selected properties of motor fuels since 1949. Twelve octane distribution percent charts for areas 1, 2, 3, and 4 for unleaded, regular, and premium grades of gasoline are presented in this report. The antiknock (octane) index ((R + M)/2) averages of gasoline sold in this country were 88.6, 89.3, and 93.7 unleaded, regular, and premium grades of gasolines, respectively.

Shelton, E.M.

1980-02-01T23:59:59.000Z

152

Implementing Motor Management  

E-Print Network [OSTI]

motors to be used in industry a non-profit organization called the Consortium for Energy Efficiency (CEE) was founded in 1991. This organization is made up of R&D organizations, state energy offices and regional energy programs, as well as electric... utilities such as Pacific Gas & Electric, Southern California Edison, New York Power Authority and Wisconsin Public Service. The U.S. Environmental Protection Agency and the Department of Energy also participate in CEE activities. The CEE 1996 Premium...

Colip, R. L.

153

Motor gasolines, summer 1980  

SciTech Connect (OSTI)

Analytical data for 2062 samples of motor gasoline were collected from service stations throughout the country and were analyzed in the laboratories of various refiners, motor manufacturers, and chemical companies. The data were submitted to the Bartlesville Energy Technology Center for study, necessary calculations, and compilation under a cooperative agreement between the Bartlesville Energy Technology Center (BETC) and the American Petroleum Institute (API). The samples represent the products of 48 companies, large and small, which manufacture and supply gasoline. These data are tabulated by groups according to brands (unlabeled) and grades for 17 marketing districts into which the country is divided. A map included in this report, shows marketing areas, districts and sampling locations. The report also includes charts indicating the trends of selected properties of motor fuels since 1949. Twelve octane distribution percent charts for areas 1, 2, 3, and 4 for unleaded, regular, and premium grades of gasoline are presented in this report. The anitknock (octane) index ((R + M)/2) averages of gasolines sold in this country were 87.8 for the unleaded below 90.0, 91.6 for the unleaded 90.0 and above, 88.9 for the regular, and 92.8 for the premium grades of gasoline.

Shelton, E.M.

1981-02-01T23:59:59.000Z

154

Motor gasolines, Summer 1982  

SciTech Connect (OSTI)

The samples were collected from service stations throughout the country and were analyzed in the laboratories of various refiners, motor manufacturers, and chemical companies. The analytical data for 796 samples of motor gasoline, were submitted to the Bartlesville Energy Technology Center for study, necessary calculations, and compilation under a cooperative agreement between the Bartlesville Energy Technology Center (BETC) and the American Petroleum Institute (API). They represent the products of 22 companies, large and small, which manufacture and supply gasoline. These data are tabulated by groups according to brands (unlabeled) and grades for 17 marketing districts into which the country is divided. A map included in this report, shows marketing areas, districts and sampling locations. The report also includes charts indicating the trends of selected properties of motor fuels since 1959. Sixteen octane distribution percent charts for areas 1, 2, 3, and 4 for unleaded antiknock index (R + M)/2 below 90.0, unleaded antiknock index (R + M)/2 90.0 and above, leaded antiknock index (R + M)/2 below 93.0, and leaded antiknock index (R + M)/2 93.0 and above grades of gasoline are presented in this report. The antiknock (octane) index (R + M)/2 averages of gasoline sold in this country were 87.3 for unleaded below 90.0, 91.7 for unleaded 90.0 and above, 89.0 for leaded below 93.0, and no data in this report for 93.0 and above grades of leaded gasoline.

Shelton, E.M.

1983-03-01T23:59:59.000Z

155

Stabilizer for motor vehicle  

SciTech Connect (OSTI)

This patent describes a stabilizer for a motor vehicle comprising: a rod-shaped torsion section extending in the transverse direction of a motor vehicle; a pair of arm sections continuous with both ends of the torsion section and extending in the longitudinal direction of the motor vehicle; a first member attached to the torsion section or at least one of the arm sections and formed with an axially penetrating cylindrical bore; a columnar second member inserted in the bore of the first member; at least one coil spring disposed between the inner peripheral surface of the bore of the first member and the outer peripheral surface of the second member and wound around the second member, at least one end of the coil spring being a free end; an operating member connected to the free end of the coil spring, at least a part of the operating member being located outside the first member; and drive means coupled to the operating member and adapted to apply a force in a direction such that the diameter of the coil spring is increased or reduced.

Takadera, I.; Kuroda, S.

1986-11-11T23:59:59.000Z

156

Vibrating sample magnetometer with a step motor  

Science Journals Connector (OSTI)

A new version of the low-frequency (3.6 Hz) vibrating sample magnetometer was built. Its mechanical part consists of a crank transducer with a step motor driven by a microcontroller. Step durations are programmed in such a way that the signal from pick-up coils is perfectly sinusoidal as a function of time. The signal is narrow-band amplified, digitized at each of 400 steps of one period and lock-in detected by a computer. The magnetometer has low noise and may be used not only with superconducting but with water-cooled magnets.

V I Nizhankovskii; L B Lugansky

2007-01-01T23:59:59.000Z

157

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 47, NO. 1, JANUARY/FEBRUARY 2011 223 EMI Study of Three-Phase Inverter-Fed Motor Drives  

E-Print Network [OSTI]

of Three-Phase Inverter-Fed Motor Drives Bertrand Revol, James Roudet, Jean-Luc Schanen, Senior Member setup and can be used during the design of a variable-speed inverter motor association. The objective in an inverter­motor association in order to depict the influence of elements, such as the elec- tromagnetic

Paris-Sud XI, Université de

158

DiversityĖdisturbance relationships: frequency and intensity interact  

Science Journals Connector (OSTI)

...relationship depended on the frequency of disturbances by the...diversity as the response variable and frequency and intensity as factors...unequivocally that the frequency-intensity interaction drives the coexistence of ecologically...

2012-01-01T23:59:59.000Z

159

Neotyphodium endophyte infection frequency in annual grass populations: relative importance of mutualism and transmission efficiency  

Science Journals Connector (OSTI)

...equilibrium infection frequency, even if infected...equilibrium infection frequency (see also Ravel...should be expected to drive the patterns of endophyte infection frequency. Variability in...environmental factors, variable proportions of viable...

2008-01-01T23:59:59.000Z

160

Advanced Manufacturing Office: MotorMaster+  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

MotorMaster+ to MotorMaster+ to someone by E-mail Share Advanced Manufacturing Office: MotorMaster+ on Facebook Tweet about Advanced Manufacturing Office: MotorMaster+ on Twitter Bookmark Advanced Manufacturing Office: MotorMaster+ on Google Bookmark Advanced Manufacturing Office: MotorMaster+ on Delicious Rank Advanced Manufacturing Office: MotorMaster+ on Digg Find More places to share Advanced Manufacturing Office: MotorMaster+ on AddThis.com... MotorMaster+ This photo shows the inner workings of an industrial electric motor with gears. In the lower left hand corner are the words "MotorMaster+" and underneath are the words "Motor-Driven Systems." Download MotorMaster+ now! Version: 4.01.01 Release Date: September 21, 2010 Release Notes Metric Unit Measurements: No

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Active Diffusion of Motor Particles  

Science Journals Connector (OSTI)

The movement of motor particles consisting of one or several molecular motors bound to a cargo particle is studied theoretically. The particles move on patterns of immobilized filaments. Several patterns are described for which the motor particles undergo nondirected but enhanced diffusion. Depending on the walking distance of the particles and the mesh size of the patterns, the active diffusion coefficient exhibits three different regimes. For micrometer-sized motor particles in water, e.g., this diffusion coefficient can be enhanced by 2†orders of magnitude.

Stefan Klumpp and Reinhard Lipowsky

2005-12-23T23:59:59.000Z

162

Motor fuel prices in Turkey  

Science Journals Connector (OSTI)

Abstract The world?s most expensive motor fuel (gasoline, diesel and LPG) is sold most likely in the Republic of Turkey. This paper investigates the key issues related to the motor fuel prices in Turkey. First of all, the paper analyses the main reason behind high prices, namely motor fuel taxes in Turkey. Then, it estimates the elasticity of motor fuel demand in Turkey using an econometric analysis. The findings indicate that motor fuel demand in Turkey is quite inelastic and, therefore, not responsive to price increases caused by an increase in either pre-tax prices or taxes. Therefore, fuel market in Turkey is open to opportunistic behavior by firms (through excessive profits) and the government (through excessive taxes). Besides, the paper focuses on the impact of high motor fuel prices on road transport associated activities, including the pattern of passenger transportation, motorization rate, fuel use, total kilometers traveled and CO2 emissions from road transportation. The impact of motor fuel prices on income distribution in Turkey and Turkish public opinion about high motor fuel prices are also among the subjects investigated in the course of the study.

Erkan Erdogdu

2014-01-01T23:59:59.000Z

163

Motor gasolines, summer 1981  

SciTech Connect (OSTI)

The samples were collected from service stations throughout the country and were analyzed in the laboratories of various refiners, motor manufacturers, and chemical companies. The analytical data for 715 samples of motor gasoline were submitted to the Bartlesville Energy Technology Center for study, necessary calculations, and compilation under a cooperative agreement between the Bartlesville Energy Technology Center (BETC) and the American Petroleum Institute (API). They represent the products of 33 companies, large and small, which manufacture and supply gasoline. These data are tabulated by groups according to brands (unlabeled) and grades for 17 marketing included in this report shows marketing districts into which the country is divided. A map included in this report shows marketing areas, districts and sampling locations. The report also includes charts indicating the trends of selected properties of motor fuels since 1959. Sixteen octane distribution percent charts for areas 1, 2, 3, and 4 for unleaded antiknock index (R+M)/2 below 90.0, unleaded antiknock index (R+M)/2 90.0 and above, leaded antiknock index (R+M)/2 below 93.0, and leaded antiknock index (R+M)/2 93.0 and above grades of gasoline are presented in this report. The antiknock (octane) index (R+M)/2 averages of gasoline sold in this country were 87.4 for unleaded below 90.0, 91.3 for unleaded 90.0 and above, 89.0 for leaded below 93.0, and no data in this report for 93.0 and above grades of leaded gasoline.

Shelton, E.M.

1982-04-01T23:59:59.000Z

164

An inexpensive motor-driven buret  

Science Journals Connector (OSTI)

An inexpensive motor-driven buret ... Presents a design for as inexpensive motor-driven buret that relies on a micrometer syringe and a constant-speed electric motor. ...

Lee D. Hansen; William M. Litchman; Edwin A. Lewis; Ronald E. Allred

1969-01-01T23:59:59.000Z

165

FrequencyĖdependent numerical dynamics in mosquitofish  

Science Journals Connector (OSTI)

...can invade, but not drive the others extinct...equilibrium of genotype frequencies and total numbers...replication in the low-frequency treatment because the...treatment to be more variable. Mesocosms were established...from throw-trap data Frequency-dependent numerical...

2002-01-01T23:59:59.000Z

166

Electric motor with controllable speed and torque  

Science Journals Connector (OSTI)

The proposed electric motor is characterized by controllable speed and torque ... shaft, at constant rotor speed. In this motor, the torque at the output shaft increases...

R. G. Khadeev

2011-01-01T23:59:59.000Z

167

Electric Motor Thermal Management | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

and Peer Evaluation Meeting ape030bennion2012o.pdf More Documents & Publications Electric Motor Thermal Management Electric Motor Thermal Management Vehicle Technologies...

168

Training: Motor Systems | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

staff, plant managers, and plant engineers gain an understanding of electric motor systems management and skills to help them manage motor systems for reduced energy cost and...

169

MotorMaster+ | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

System Assessment Tool MotorMaster+ MotorMaster+ International Plant Energy Profiler Pumping System Assessment Tool Process Heating Assessment and Survey Tool Steam System Modeler...

170

Trexa Motor Corporation TMC | Open Energy Information  

Open Energy Info (EERE)

Trexa Motor Corporation TMC Jump to: navigation, search Name: Trexa Motor Corporation (TMC) Place: Los Angeles, California Sector: Vehicles Product: Los Angeles - based subsidiary...

171

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System  

E-Print Network [OSTI]

point of the variable frequency drive . . . . . . . . . . .motor driven by a variable frequency drive (VFD) enablingset point of the variable frequency drive Test setup for a

Norwood, Zachary Mills

2011-01-01T23:59:59.000Z

172

Quantifying the Co-benefits of Energy-Efficiency Programs: A Case Study of the Cement Industry in Shandong Province, China  

E-Print Network [OSTI]

Geological Society variable frequency drive volatile organicefficiency motors Variable frequency drive (VFD) in raw millefficiency fan Variable frequency drive in cooler fan of

Hasanbeigi, Ali

2014-01-01T23:59:59.000Z

173

Demonstration of Intelligent Control and Fan Improvements in Computer Room Air Handlers  

E-Print Network [OSTI]

ECM motor, plug fan, variable frequency drive i ii TABLE OFcontrol system and variable frequency drives can be added toby adding variable frequency drives (VFDs) to fans with

Coles, Henry

2014-01-01T23:59:59.000Z

174

Analysis of Energy-Efficiency Opportunities for the Cement Industry in Shandong Province, China  

E-Print Network [OSTI]

Geological Society variable frequency drive vertical rollerHigh efficiency motors Variable Frequency Drive (VFD) in rawmill vent fan Variable Frequency Drive in cooler fan of

Price, Lynn

2010-01-01T23:59:59.000Z

175

Energy Efficiency Improvement and Cost Saving Opportunities for the Petrochemical Industry - An ENERGY STAR(R) Guide for Energy and Plant Managers  

E-Print Network [OSTI]

AFDs), and variable frequency drives (VFDs). The term ASD iscontrolled by variable frequency drives (VFD) could save afan motor with a variable frequency drive (VFD), substantial

Neelis, Maarten

2008-01-01T23:59:59.000Z

176

A Review of Energy Use and Energy Efficiency Technologies for the Textile Industry  

E-Print Network [OSTI]

2012) Installation of Variable Frequency Drive on AutoconerInstallation of Variable Frequency Drive (VFD) for washerInstallation of Variable Frequency Drive on pump motor of

Hasanbeigi, Ali

2014-01-01T23:59:59.000Z

177

Submersible canned motor mixer pump  

DOE Patents [OSTI]

A mixer pump used in a waste tank for mobilizing high-level radioactive liquid waste having a column assembly containing power cables, a motor housing with electric motor means which includes a stator can of a stator assembly and a rotor can of a rotor assembly, and an impeller assembly with an impeller connected to a shaft of the rotor assembly. The column assembly locates the motor housing with the electric motor means adjacent to the impeller which creates an hydraulic head, and which forces the liquid waste into the motor housing to cool the electric motor means and to lubricate radial and thrust bearing assemblies. Hard-on-hard bearing surfaces of the bearing assemblies and a ring assembly between the impeller and electric motor means act to grind down large particles in the liquid waste flow. These larger particles are received in slots in the static bearing members of the radial bearing assemblies. Only solid waste particles smaller than the clearances in the system can pass therethrough, thereby resisting damage to and the interruption of the operation of the mixer pump.

Guardiani, Richard F. (Ohio Township, PA); Pollick, Richard D. (Sarver, PA)

1997-01-01T23:59:59.000Z

178

Submersible canned motor mixer pump  

DOE Patents [OSTI]

A mixer pump is described used in a waste tank for mobilizing high-level radioactive liquid waste having a column assembly containing power cables, a motor housing with electric motor means which includes a stator can of a stator assembly and a rotor can of a rotor assembly, and an impeller assembly with an impeller connected to a shaft of the rotor assembly. The column assembly locates the motor housing with the electric motor means adjacent to the impeller which creates an hydraulic head, and which forces the liquid waste into the motor housing to cool the electric motor means and to lubricate radial and thrust bearing assemblies. Hard-on-hard bearing surfaces of the bearing assemblies and a ring assembly between the impeller and electric motor means act to grind down large particles in the liquid waste flow. These larger particles are received in slots in the static bearing members of the radial bearing assemblies. Only solid waste particles smaller than the clearances in the system can pass there through, thereby resisting damage to and the interruption of the operation of the mixer pump. 10 figs.

Guardiani, R.F.; Pollick, R.D.

1997-10-07T23:59:59.000Z

179

Research Laboratories General Motors Corporation General Motors Technical Center  

Office of Legacy Management (LM)

MI. 1-q Research Laboratories General Motors Corporation General Motors Technical Center Warren, Michigan 48090 January 21, 1977 Occupational Health Standards Branch Office of Standards Development U. S. Nuclear Requlatory Commission Washington, D.C. 20555 Attention: Mr. Robert E. Alexander, Chief Dear Mr. Alexander: In 1974, General Motors Corporation acquired a manufacturing plant in Adrian, Michigan. On October 21, 1976, General Motors announced that work would begin immediately to prepare the plant for manufacturing operations (Appendix A). A news release, made by Mr. Irving Loop of ERDA and carried by radio station WABJ of Adrian, Michigan on May 11, 1976, stated that natural uranium was handled in the plant after World War II and that

180

Topic 7 Organization of Motor System -Cortical Motor Areas  

E-Print Network [OSTI]

Cartoon, 1986 Electrical stimulation produces movement of contralateral body parts. #12;4 Motor Homunculus previous stimulation technique · Insert electrode into cortical layer V and use electrical stimulation" somatotopic map vs "more complex" map #12;

Sergio, Lauren E.

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Finished Motor Gasoline Net Production  

Gasoline and Diesel Fuel Update (EIA)

Data Series: Finished Motor Gasoline Finished Motor Gasoline (less Adj.) Reformulated Gasoline Reformulated Gasoline Blenede w/ Fuel Ethanol Reformulated Other Gasoline Conventional Gasoline Conventional Gasoline Blended w/ Fuel Ethanol Conventional Gasoline Blended w/ Fuel Ethanol, Ed55 & Ed55 Other Conventional Gasoline Finished Motor Gasoline Adjustment Kerosene-Type Jet Fuel Kerosene-Type Jet, Commercial Kerosene-Type Jet, Military Distillate Fuel Oil Distillate Fuel Oil, 15 ppm Sulfur and Under Distillate Fuel Oil > 15 ppm to 500 ppm Sulfur Distillate Fuel Oil > 500 ppm Sulfur Residual Fuel Oil Propane/Propylene Period: Weekly 4-Week Average

182

A computer-based total productive maintenance model for electric motors  

Science Journals Connector (OSTI)

The paper describes the development of a computer-based total productive maintenance (TPM) model to improve electrical motors readiness and uptime while reducing capital overhead. The TPM model includes the consideration of reactive, periodic, and predictive practices. The input data is processed and the generated report details a set of periodic recommendations providing guidelines on recommended actions and their frequency. The details about test results indicating the current condition of the motor as well estimated reactive, periodic, and predictive maintenance cost details are presented. Based on the historic data stored in its database, the model can predict potential problems prior to failure as well as prescribe periodic maintenance actions to maximise motor life. The TPM model will be a useful tool to predict the degradation in motor life due to deterioration in insulation, bearing, rotor bar and stator windings of the motor.

Aruna Muniswamy; Bhaskaran Gopalakrishnan; Subodh Chaudhari; Majid Jaridi; Ed Crowe; Deepak Gupta

2014-01-01T23:59:59.000Z

183

Dynamic vibration analysis of a swash-plate type water hydraulic motor  

Science Journals Connector (OSTI)

This paper presents the study of the dynamic analysis of a swash-plate water hydraulic motor in a modern water hydraulic system. A swash-plate mechanism is modeled as a system with three masses and 14 degrees of freedom (DOF). In order to evaluate the applicability of the dynamic model, the numerical simulation analysis of the dynamic response of the model due to pressure pulsation is presented and compared with experimental results. A series of the dynamic vibration characteristics of the water hydraulic piston motor are studied by the numerical simulation. It is effective for the model to simulate the vibration signal of the casing in the hydraulic motor. The waveform and frequency of the simulated signal is similar to the experimental signal. The simulated signals in other directions show that the vibration signals in all the directions mainly consist of the hydraulic pump and hydraulic motor rotational frequencies.

H.X. Chen; Patrick S.K. Chua; G.H. Lim

2006-01-01T23:59:59.000Z

184

Gene Frequency  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Gene Frequency Gene Frequency Name: donna Location: N/A Country: N/A Date: N/A Question: If six fingers is a dominant human trait why do we have only five? Replies: This is simple. There are just not many genes in the human population for six fingers. Steve Sample Look in any high school biology book for what is known as Hardy-Weinberg equilibrium. These two scientists (separately) said that gene frequencies do not change much unless something in the environment selects them over other genes. In other words, unless 6 fingers somehow becomes an advantage, and five-fingered people have less of an advantage, the frequency of six fingered people in the population will not necessarily increase. This is the same reason that recessive traits don't disappear from the population. Also, six fingers is not considered attractive and they may not get as many mates. Also, more people are born with six fingers than you might imagine but just have them amputated shortly after birth.

185

AQWON Motors | Open Energy Information  

Open Energy Info (EERE)

AQWON Motors AQWON Motors Jump to: navigation, search Name AQWON-Motors Place Speinshart, Germany Zip 92676 Sector Hydro, Hydrogen Product AQWON-Motors has developed the first hydrogen powered 2 stroke-engine scooter. It has been approved by the German T√ÉŇďV√ā (the official technical inspection agency). Coordinates 49.78699¬į, 11.820385¬į Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":49.78699,"lon":11.820385,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

186

Myers Motors | Open Energy Information  

Open Energy Info (EERE)

Myers Motors Myers Motors Jump to: navigation, search Name Myers Motors Place Tallmadge, Ohio Zip 44278 Sector Vehicles Product Myers Motors produces three wheeled electric vehicles. Coordinates 41.10294¬į, -81.440864¬į Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":41.10294,"lon":-81.440864,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

187

Recover Power with Hydraulic Motors  

E-Print Network [OSTI]

Anywhere liquid pressure is reduced across a throttling device, there is a potential application for a hydraulic power recovery motor (HPRM). Cost of power makes HPRM's attractive with recoveries as small as 25 hp on a continuous basis. When...

Brennan, J. R.

1982-01-01T23:59:59.000Z

188

Tesla Motors | Open Energy Information  

Open Energy Info (EERE)

Tesla Motors Tesla Motors Jump to: navigation, search Logo: Tesla Motors Name Tesla Motors Address 1050 Bing Street Place San Carlos, California Zip 94070 Sector Vehicles Product Produces electric vehicles Website http://www.teslamotors.com/ Coordinates 37.496737¬į, -122.245323¬į Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":37.496737,"lon":-122.245323,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

189

Rotary Electrodynamics of a DC Motor: Motor as Mechanical Capacitor Lab 2: Modeling and System Identification  

E-Print Network [OSTI]

). · im is the current through the motor. Because the motor is in series with all other electrical). Because power is conserved, m = Kmim (motor efficiency is actually closer to 69%). Here, Km 0.00767 VRotary Electrodynamics of a DC Motor: Motor as Mechanical Capacitor Lab 2: Modeling and System

190

Segmented rail linear induction motor  

DOE Patents [OSTI]

A segmented rail linear induction motor has a segmented rail consisting of a plurality of nonferrous electrically conductive segments aligned along a guideway. The motor further includes a carriage including at least one pair of opposed coils fastened to the carriage for moving the carriage. A power source applies an electric current to the coils to induce currents in the conductive surfaces to repel the coils from adjacent edges of the conductive surfaces.

Cowan, Jr., Maynard (1107 Stagecoach Rd. SE., Albuquerque, NM 87123); Marder, Barry M. (1412 Pinnacle View Dr. NE., Albuquerque, NM 87123)

1996-01-01T23:59:59.000Z

191

Segmented rail linear induction motor  

DOE Patents [OSTI]

A segmented rail linear induction motor has a segmented rail consisting of a plurality of nonferrous electrically conductive segments aligned along a guideway. The motor further includes a carriage including at least one pair of opposed coils fastened to the carriage for moving the carriage. A power source applies an electric current to the coils to induce currents in the conductive surfaces to repel the coils from adjacent edges of the conductive surfaces. 6 figs.

Cowan, M. Jr.; Marder, B.M.

1996-09-03T23:59:59.000Z

192

Matching of photovolatic motor-pump systems for maximum efficiency operation  

Science Journals Connector (OSTI)

A PV array is a nonlinear d.c. source and its operation has to be carefully matched to that of its equivalent electrical load in order to extract the maximum available energy. Two PV pumping schemes are investigated to get the maximum gross mechanical power. The system based on the separately-excited d.c. motor is matched through the control of the motor excitation, while for the system based on the induction motor, the voltage source inverter frequency is controlled by maximum mechanical power operation.

Aziza M. Zaki; Mona N. Eskander

1996-01-01T23:59:59.000Z

193

Coordination of Voltage and Frequency Feedback in Load-Frequency Control Capability of Wind Turbine  

E-Print Network [OSTI]

Coordination of Voltage and Frequency Feedback in Load-Frequency Control Capability of Wind Turbine-Frequency Control (LFC) is gradually shifted to Variable Speed Wind Turbines (VSWTs). In order to equip VSWT@et.aau.dk Abstract--In near future, with high penetration of Wind Energy (WE) in power system, the burden of Load

Silva, Filipe Faria Da

194

EERE-2010-BT-STD-0027 Ex Parte Letter NEMA Motor Training re DOE Motors  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

0-BT-STD-0027 Ex Parte Letter NEMA Motor Training re DOE 0-BT-STD-0027 Ex Parte Letter NEMA Motor Training re DOE Motors Rule 15 July 2013. EERE-2010-BT-STD-0027 Ex Parte Letter NEMA Motor Training re DOE Motors Rule 15 July 2013. This memorandum memorializes a communication between DOE staff and members of the NEMA Motor and Generator Section in connection with this proceeding. NEMA thanks the DOE for the opportunity to conduct training for DOE staff and its consultants on July 15th, 2013 which illustrated the different types of motors, motor construction theory and motor applications by type. It is our hope that better understanding of motor types and construction will assist the Department and its consultants with the discharge of their duties. EERE-2010-BT-STD-0027 Ex Parte Letter NEMA Motor Training re DOE Motors

195

Ultrasonic Motorís H-Bridge Control Circuit Using Phase-Shift PWM Method  

Science Journals Connector (OSTI)

Ultrasonic motor is a special kind of actuator for motion control system. Because of the peculiar mechanism of ultrasonic motor, control circuit is needed for the operation of ultrasonic motor. The performance of...

Shi Jingzhuo; Zhang Yanan

2014-06-01T23:59:59.000Z

196

Method and apparatus for pulse width modulation control of an AC induction motor  

DOE Patents [OSTI]

An inverter is connected between a source of DC power and a three-phase AC induction motor, and a micro-processor-based circuit controls the inverter using pulse width modulation techniques. In the disclosed method of pulse width modulation, both edges of each pulse of a carrier pulse train are equally modulated by a time proportional to sin .THETA., where .THETA. is the angular displacement of the pulse center at the motor stator frequency from a fixed reference point on the carrier waveform. The carrier waveform frequency is a multiple of the motor stator frequency. The modulated pulse train is then applied to each of the motor phase inputs with respective phase shifts of 120.degree. at the stator frequency. Switching control commands of electronic switches in the inverter are stored in a random access memory (RAM) and the locations of the RAM are successively read out in a cyclic manner, each bit of a given RAM location controlling a respective phase input of the motor. The DC power source preferably comprises rechargeable batteries and all but one of the electronic switches in the inverter can be disabled, the remaining electronic switch being part of a "flyback" DC-DC converter circuit for recharging the battery.

Geppert, Steven (Bloomfield Hills, MI); Slicker, James M. (Union Lake, MI)

1984-01-01T23:59:59.000Z

197

REPLACING AN OVERSIZED AND UNDERLOADED ELECTRIC MOTOR  

E-Print Network [OSTI]

This fact sheet will assist in decisions regarding replacement of oversized and underloaded motors. It includes a discussion of how the MotorMaster software can be used to conduct motor replacement analyses. Motors rarely operate at their full-load point. Field tests of 60 motors at four industrial plants indicate that, on average, they operate at 60 % of their rated load. 1 Motors that drive supply or return air fans in heating, ventilation and air-conditioning (HVAC) systems generally operate at 70 % to 75 % of rated load. 2 A persistent myth is that oversized motors, especially motors operating below 50 % of rated load, are not efficient and should be immediately replaced with appropriately sized energy-efficient units. In actuality, several pieces of information are required to complete an accurate assessment of energy savings. They are the load on the motor, the operating efficiency of the motor at that load point, the full-load speed (in revolutions per minute [rpm]) of the motor to be replaced, and the full-load speed of the downsized replacement motor. 3 Motor Load Estimation Techniques Operating efficiency and motor load values must be assumed or based on field measurements and

unknown authors

198

Electric motors: Markets, trends, and applications  

SciTech Connect (OSTI)

Electric motors play an important role in nearly all sectors of the US economy. Typical motor applications range from air conditioning and appliances in the residential sector, to cooling and space heating in the commercial sector, to materials handling and processing in the industrial sectors. Motors in the residential sector consumed nearly 352 billion kilowatthours (BkWh) in 1985, in the commercial sector 279 BkWh, and the industrial sector 552 BkWh. Approximately 87% of electric motor electricity use in the industrial sector was consumed in manufacturing processes, while the process industries consumed more than half of the manufacturing sector's electric motor electricity use. The total motor population in all sectors in 1987 stood just shy of 1.02 billion, 90% of which are less than one horsepower (HP) in size. An increasing percentage of the motor population is comprised of high efficiency motors, as classified by the National Electrical Manufacturers Association (NEMA). High efficiency motors offer end-users greater energy and cost savings than do their standard efficiency counterparts. This report provides an overview of the history of the electric motor, a brief description of the electromechanical theory behind motor operations, and offers a statistical review of the size and distribution of the electric motor market. The report also presents data on sector motor electricity use, describes current and potential motor application opportunities, and details areas in which further research and development may be needed.

Not Available

1992-06-01T23:59:59.000Z

199

Three phase AC motor controller  

DOE Patents [OSTI]

A motor controller for a three phase AC motor (10) which is adapted to operate bidirectionally from signals received either from a computer (30) or a manual control (32). The controller is comprised of digital logic circuit means which implement a forward and reverse command signal channel (27, 29) for the application of power through the forward and reverse power switching relays (16, 18, 20, 22). The digital logic elements are cross coupled to prevent activation of both channels simultaneously and each includes a plugging circuit (65, 67) for stopping the motor upon the removal of control signal applied to one of the two channels (27, 29) for a direction of rotation desired. Each plugging circuit (65, 67) includes a one-shot pulse signal generator (88, 102) which outputs a single pulse signal of predetermined pulsewidth which is adapted to inhibit further operation of the application of power in the channel which is being activated and to apply a reversal command signal to the other channel which provides a reversed phase application of power to the motor for a period defined by the pulse-width output of the one-shot signal generator to plug the motor (10) which will then be inoperative until another rotational command signal is applied to either of the two channels.

Vuckovich, Michael (Elizabeth, PA); Wright, Maynard K. (Bethel Park, PA); Burkett, John P. (South Huntington Township, Westmoreland County, PA)

1984-03-20T23:59:59.000Z

200

Selected Bibliography on Electric Motor Repair | Department of...  

Broader source: Energy.gov (indexed) [DOE]

Selected Bibliography on Electric Motor Repair Selected Bibliography on Electric Motor Repair The following series of repair documents related to electric motors were produced by...

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Continuous Energy Improvement in Motor Driven Systems - A Guidebook...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

More Documents & Publications Energy Management for Motor-Driven Systems Premium Efficiency Motor Selection and Application Guide - A Handbook for Industry MotorMaster+ User Manual...

202

Impact of Motor Failures on Payback Periods  

E-Print Network [OSTI]

developed by the Washington State Energy Office and funded by the U.S. Department of Energy and the Bonneville Power Administration to aid in the selection of EE motors. MotorMaster's database contains information on over 10, 000 available motors... developed by the Washington State Energy Office and funded by the U.S. Department of Energy and the Bonneville Power Administration to aid in the selection of EE motors. MotorMaster's database contains information on over 10, 000 available motors...

Cheek, K. F.; Pillay, P.; Dudley, K. J.

203

Mission Motors | Open Energy Information  

Open Energy Info (EERE)

Motors Motors Jump to: navigation, search Name Mission Motors Place San Francisco, California Sector Vehicles Product Electric Motorcycles Year founded 2007 Number of employees 11-50 Website http://www.ridemission.com/ Coordinates 37.7749295¬į, -122.4194155¬į Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":37.7749295,"lon":-122.4194155,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

204

Aptera Motors | Open Energy Information  

Open Energy Info (EERE)

Aptera Motors Aptera Motors Jump to: navigation, search Name Aptera Motors Address 2778 Loker Avenue West Place Carlsbad, California Zip 92008 Sector Vehicles Product Aims to to make an aerodynamic two-seater hybrid electric vehicle Website http://www.aptera.com/ Coordinates 33.1412124¬į, -117.3205123¬į Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":33.1412124,"lon":-117.3205123,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

205

Dynamic behavior analysis of a switched reluctance motor  

Science Journals Connector (OSTI)

Within the home appliances sector the series motor practically shares most applications. However no further progress in cost reduction or control performances is envisaged. But the switched reluctance motor SRM shows fairly good characteristics such as robustness easy assembly and low manufacturing costs. Besides it allows accomplishment of integrated designs with the product and an improvement of efficiency up to 90% when compared to about 45% reached by series motors used for home appliances. However two specific drawbacks of this machine are control complexity and acoustic noise. As a first step with respect to the acoustic noise the target of this work is to develop a theoretical modal model of an SRM of four phases with 24 poles in an external stator and 18 poles rotor placed inside. This requires a theoretical simulation by means of an FEM software and an experimental work in a test bench to analyze the motor structure. The comparison of the results obtained by both methods will validate the theoretical modelanalyzed with the FEM software and introduce structural modifications that can be used to design quiet SRMs from the knowledge of mode shapes and mode frequencies.

2006-01-01T23:59:59.000Z

206

Determining Hydrological Controls on Flood Frequency | U.S. DOE...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

increasing aridity, variability increases. In contrast, BFI was found to exert a second-order control on flood frequency. Higher BFI, meaning higher contributions of subsurface...

207

Enhanced Electroporation in Plant Tissues via Low Frequency Pulsed Electric Fields: Influence of Cytoplasmic Streaming  

E-Print Network [OSTI]

Enhanced Electroporation in Plant Tissues via Low Frequency Pulsed Electric Fields: Influence (wileyonlinelibrary.com). Pulsed electric fields (PEF) are known to be effective at permeabilizing plant tissues: cytoplasmic streaming, molecular motor proteins, plant tissue integrity, viability staining, conductivity

Ristenpart, William

208

Switched reluctance motor systems poised for rapid growth  

SciTech Connect (OSTI)

The emergence of a rugged, versatile, and highly efficient alternative to conventional electric motors promises to have a major impact on drivepower markets over the next decade. Although switched reluctance drives are not yet available ``off the shelf`` from major motor manufacturers, they are likely to compete favorably across a broad range of applications, due to their superior performance characteristics. Switched reluctance drives maintain higher torque and efficiency over broader speed ranges than can be achieved with other advanced variable-speed systems, can be programmed to precisely match the loads they serve and, in high-volume production, are likely to be less expensive than competing systems. The principal obstacle to rapid commercialization of switched reluctance motors is the fact that few engineers are trained to perform the exacting and specialized design that this technology requires. This hurdle is gradually being overcome as over two dozen firms now design or manufacture switched reluctance drives, and several are moving into mass production applications. As these and other firms gain experience with the technology, new opportunities will arise for utilities, energy users, and original equipment manufacturers to capture the benefits of switched reluctance motor systems. This report appraises recent progress toward moving switched reluctance drives to mass production and provides an inventory of major manufacturers.

Lovins, A.B.; Howe, B.

1992-12-31T23:59:59.000Z

209

Homopolar motor with dual rotors  

DOE Patents [OSTI]

A homopolar motor has a field rotor mounted on a frame for rotation in a first rotational direction and for producing an electromagnetic field, and an armature rotor mounted for rotation on said frame within said electromagnetic field and in a second rotational direction counter to said first rotational direction of said field rotor. The two rotors are coupled through a 1:1 gearing mechanism, so as to travel at the same speed but in opposite directions. This doubles the output voltage and output power, as compared to a motor in which only the armature is rotated. Several embodiments are disclosed. 7 figs.

Hsu, J.S.

1998-12-01T23:59:59.000Z

210

Thermoelectric generator for motor vehicle  

SciTech Connect (OSTI)

A thermoelectric generator is described for producing electric power for a motor vehicle from the heat of the exhaust gases produced by the engine of the motor vehicle. The exhaust gases pass through a finned heat transfer support structure which has seat positions on its outside surface for the positioning of thermoelectric modules. A good contact cylinder provides a framework from which a spring force can be applied to the thermoelectric modules to hold them in good contact on their seats on the surface of the heat transfer support structure. 8 figs.

Bass, J.C.

1997-04-29T23:59:59.000Z

211

Thermoelectric generator for motor vehicle  

DOE Patents [OSTI]

A thermoelectric generator for producing electric power for a motor vehicle from the heat of the exhaust gasses produced by the engine of the motor vehicle. The exhaust gasses pass through a finned heat transfer support structure which has seat positions on its outside surface for the positioning of thermoelectric modules. A good contact cylinder provides a framework from which a spring force can be applied to the thermoelectric modules to hold them in good contact on their seats on the surface of the heat transfer support structure.

Bass, John C. (6121 La Pintra Dr., La Jolla, CA 92037)

1997-04-29T23:59:59.000Z

212

The 4 phase VSR motor: The ideal prime mover for electric vehicles  

SciTech Connect (OSTI)

4 phase variable switched reluctance motors are gaining acceptance in many applications due to their fault tolerant characteristics. A 4 phase variable switched reluctance motor (VSR) is modelled and its performance is predicted for several operating points for an electric vehicle application. The 4 phase VSR offers fault tolerance, high performance, and an excellent torque to weight ratio. The actual system performance was measured both on a teststand and on an actual vehicle. While the system described is used in a production electric motorscooter, the technology is equally applicable for high efficiency electric cars and buses. 4 refs.

Holling, G.H.; Yeck, M.M.

1994-12-31T23:59:59.000Z

213

Brushless Separately Excited Direct Current Motor Electric Motors: A Survey  

E-Print Network [OSTI]

Abstract: In this paper the importance of brushless SEDC electric motors in the automotive industry continues to grow, writes Matthew Beecham. The driving force behind market growth is motorists í insatiable demand for safety, comfort, economy, a clean environment and overall quality of driving.

R. C. Chourasia; Dr. A. K. Bhardwaj

214

Electric Motor Emulator Versus Rotating Test Rig  

Science Journals Connector (OSTI)

A controversial issue among experts is whether real-time model-based electric motor emulation can replace a conventional rotating test ... a complete inverter test system with an integrated electric motor emulato...

Dipl.-Ing. (FH) Horst Hammerer; Dipl.-Ing. (FH) Dieter Strauss

2012-06-01T23:59:59.000Z

215

Ultra High Efficiency Electric Motor Generator  

Science Journals Connector (OSTI)

The Ultra High Efficiency Electric Motor Generator is an exciting opportunity to leverage ... in green technology. Marand currently produces this motor/generator at our Moorabbin facility for application ... sola...

Jeff Brown

2012-01-01T23:59:59.000Z

216

Motor Wave Group | Open Energy Information  

Open Energy Info (EERE)

MHK Technologies: MotorWave This article is a stub. You can help OpenEI by expanding it. Retrieved from "http:en.openei.orgwindex.php?titleMotorWaveGroup&oldid769272...

217

Single molecule measurements and molecular motors  

Science Journals Connector (OSTI)

...Hideyuki Okano and Atsushi Iriki Single molecule measurements and molecular motors...Suita, Osaka 565-0871, Japan Single molecule imaging and manipulation are...machines like molecular motors. The single molecule measurements allow a dynamic...

2008-01-01T23:59:59.000Z

218

Motor Energy Saving Opportunities in an Industrial Plant  

E-Print Network [OSTI]

Industrial plants have enormous energy saving opportunities with electric motors. Improving motor efficiency is a conventional wisdom to save energy. Re-engineering affords far greater savings opportunities than motor efficiency improvement. Motor...

Kumar, B.; Elwell, A.

219

A Novel Approach to Determining Motor Load  

E-Print Network [OSTI]

A NOVEL APPROACH TO DETERMINING MOTOR LOAD by Michael Brown Georgia Tech Research Institute Atlanta, Georgia ABSTRACf Properly sized electric motors are essential if industrial plant efficiency is to be optimized and energy costs... minimized. Because of the difficully in making power measurements on three phase motors, loading is rarely, if ever, checked. A simple indication of motor load can be achieved by measuring operating speed because speed and load are almost linearly...

Brown, M.

220

Energy Management for Motor-Driven Systems  

Broader source: Energy.gov [DOE]

This document assists in establishing an energy management plan, identifying energy savings opportunities, and designing a motor improvement plan.

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Motorized control for mirror mount apparatus  

DOE Patents [OSTI]

A motorized control and automatic braking system for adjusting mirror mount apparatus is disclosed. The motor control includes a planetary gear arrangement to provide improved pitch adjustment capability while permitting a small packaged design. The motor control for mirror mount adjustment is suitable for laser beam propagation applications. The brake is a system of constant contact, floating detents which engage the planetary gear at selected between-teeth increments to stop rotation instantaneously when the drive motor stops.

Cutburth, Ronald W. (Tracy, CA)

1989-01-01T23:59:59.000Z

222

Determining Electric Motor Load and Efficiency  

Broader source: Energy.gov [DOE]

To compare the operating costs of an existing standard motor with an appropriately-sized energy-efficient replacement, you need to determine operating hours, efficiency improvement values, and load. Part-load is a term used to describe the actual load served by the motor as compared to the rated full-load capability of the motor. Motor part-loads may be estimated through using input power, amperage, or speed measurements. This fact sheet briefly discusses several load estimation techniques.

223

Conducting a Motor Survey: Key Step for Establishing a Motor Management Policy  

E-Print Network [OSTI]

Roughly 70% of the energy consumed by manufacturing processes is used by electric motors. According to the U.S. Department of Energy, greater attention to motor systems management can reduce motor-related energy costs by 18%. Establishing a motor...

Miller, R. B.

224

Radial-Gap Permanent Magnet Motor and Drive Research FY 2004  

SciTech Connect (OSTI)

The objective of this task was to study permanent magnet (PM) radial-gap traction drive systems that could meet the U.S. Department of Energy FreedomCAR Program's 2010 goals to expose weaknesses or identify strengths. Initially, the approach was to compare attributes such as physical deformations during operation, performance (torque, power, efficiency versus speed), material requirements (strength), material costs, manufacturability, weight, power density, specific power, reliability, and drivability for specific motors. Three motors selected were the commercially available 60-kW radial-gap surface-mounted PM motor manufactured by UQM Technologies, Inc.; a hypothetical PM motor with rotor-supported magnets similar to the Honda MCF-21; and Delphi's automotive electric machine drive motor, whose rotor is a ferromagnetic cylinder, held at one end by a shaft that supports the magnets on its inner surface. Potential problems have appeared related to PM motors, such as (1) high no-load spin losses and high operational power losses, probably from eddy current losses in the rotor; (2) the undemonstrated dual mode inverter control (DMIC) for driving a brushless dc motor (BDCM) (UQM and Delphi motors); (3) uncertainty about the potential for reducing current with DMIC; and (4) uncertainty about the relation between material requirements and maximum rotor speed. Therefore, the approach was changed to study in detail three of the comparison attributes: drivability, performance, and material requirements. Drivability and related problems were examined by demonstrating that DMIC may be used to drive an 18-pole 30-kW PM motor to 6000 rpm, where the maximum electrical frequency is 900 Hz. An available axial-gap test motor with 18 poles was used because its control is identical to that of a radial gap PM motor. Performance was analytically examined, which led to a derivation showing that DMIC controls a PM motor so that the motor uses minimum current to produce any power regardless of speed for relative speeds, n = {omega}/{omega}{sub base} {ge} 2. Performance was also examined with efficiency measurements during the 30-kW PM motor test. Material requirements were examined with finite-element analyses (FEA) to determine the speed and location where yield starts and the corresponding deformations and stresses.

McKeever, J.W.

2005-02-11T23:59:59.000Z

225

Electric Motor What happens if we put  

E-Print Network [OSTI]

Electric Motor What happens if we put a loop of wire carrying a current in a B field ? FB on opposite sides of the loop produce a torque on the loop causing it to rotate. Electric motor ÔŅĹ a commutator. #12;Electric Motor Define normal n to plane using right-hand rule Torque tends to rotate loop to align

Bertulani, Carlos A. - Department of Physics and Astronomy, Texas A&M University

226

Estimating Motor Efficiency in the Field  

Broader source: Energy.gov [DOE]

Some utility companies and public agencies offer rebates to encourage customers to upgrade their existing standard efficiency motors to premium efficiency motors. It is important to know the efficiency of the existing motor and how it is being used to accurately estimate potential annual energy and dollar savings. This tip sheet provides suggested actions and estimates of savings from improved efficiency.

227

Method and apparatus for monitoring motor operated valve motor output torque and power at valve seating  

DOE Patents [OSTI]

A method and apparatus are provided for monitoring a motor operated valve during the brief period when the valve seats and the torque switch trips to deenergize the valve motor. The method uses voltage measurements on the load side of a deenergizing switch that opens to deenergize the motor to determine, among other things, final motor rotational speed and the decelerating torque at motor deenergization. 14 figs.

Casada, D.A.

1996-01-16T23:59:59.000Z

228

Small wind turbine emulator with armature controlled separately excited DC motor via analogue electronic circuit  

Science Journals Connector (OSTI)

In this paper, a small wind turbine emulator (WTE) using separately excited DC motor is modelled, designed, simulated, implemented and tested. A 1 HP separately excited DC motor is used to emulate the characteristics of the rotor of small wind turbine. The DC motor is driven by a thyristor bridge with closed-loop cascaded PI controller for armature control. A separately excited DC generator with a variable resistive load is directly coupled to the DC motor. A small cheap analogue electronic circuit, with less interfacing, is used to generate a specific reference wind turbine speed based on the wind turbine rotor characteristics and the mechanical wind power available. Simulation and experimental results are compared to proof the validity and accuracy of the WTE.

A. Mahdy; S.M. El-Hakim; Hanafy Hassan Hanafy

2012-01-01T23:59:59.000Z

229

Performance Variability  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Variability Variability of Highly Parallel Architectures William T.C. Kramer 1 and Clint Ryan 2 1 Department of Computing Sciences, University of California at Berkeley and the National Energy Research Scientific Computing Center, Lawrence Berkeley National Laboratory 2 Department of Computing Sciences, University of California at Berkeley Abstract. The design and evaluation of high performance computers has concentrated on increasing computational speed for applications. This performance is often measured on a well configured dedicated sys- tem to show the best case. In the real environment, resources are not always dedicated to a single task, and systems run tasks that may influ- ence each other, so run times vary, sometimes to an unreasonably large extent. This paper explores the amount of variation seen across four large distributed memory systems in a systematic manner. It then

230

Chemistry in Motion: Tiny Synthetic Motors  

E-Print Network [OSTI]

In this Account, we describe how synthetic motors that operate by self-diffusiophoresis make use of a self-generated concentration gradient to drive motor motion. A description of propulsion by self-diffusiophoresis is presented for Janus particle motors comprising catalytic and noncatalytic faces. The properties of the dynamics of chemically powered motors are illustrated by presenting the results of particle-based simulations of sphere-dimer motors constructed from linked catalytic and noncatalytic spheres. The geometries of both Janus and sphere-dimer motors with asymmetric catalytic activity support the formation of concentration gradients around the motors. Because directed motion can occur only when the system is not in equilibrium, the nature of the environment and the role it plays in motor dynamics are described. Rotational Brownian motion also acts to limit directed motion, and it has especially strong effects for very small motors. We address the following question: how small can motors be and still exhibit effects due to propulsion, even if only to enhance diffusion? Synthetic motors have the potential to transform the manner in which chemical dynamical processes are carried out for a wide range of applications.

Peter H. Colberg; Shang Yik Reigh; Bryan Robertson; Raymond Kapral

2014-11-03T23:59:59.000Z

231

MTBE, Oxygenates, and Motor Gasoline  

Gasoline and Diesel Fuel Update (EIA)

MTBE, Oxygenates, and MTBE, Oxygenates, and Motor Gasoline Contents * Introduction * Federal gasoline product quality regulations * What are oxygenates? * Who gets gasoline with oxygenates? * Which areas get MTBE? * How much has been invested in MTBE production capacity? * What does new Ethanol capacity cost? * What would an MTBE ban cost? * On-line information resources * Endnotes * Summary of revisions to this analysis Introduction The blending of methyl tertiary butyl ether (MTBE) into motor gasoline has increased dramatically since it was first produced 20 years ago. MTBE usage grew in the early 1980's in response to octane demand resulting initially from the phaseout of lead from gasoline and later from rising demand for premium gasoline. The oxygenated gasoline program stimulated an

232

Reduced vibration motor winding arrangement  

DOE Patents [OSTI]

An individual phase winding arrangement having a sixty electrical degree phase belt width for use with a three phase motor armature includes a delta connected phase winding portion and a wye connected phase winding portion. Both the delta and wye connected phase winding portions have a thirty electrical degree phase belt width. The delta and wye connected phase winding portions are each formed from a preselected number of individual coils each formed, in turn, from an unequal number of electrical conductor turns in the approximate ratio of {radical}3. The individual coils of the delta and wye connected phase winding portions may either be connected in series or parallel. This arrangement provides an armature winding for a three phase motor which retains the benefits of the widely known and utilized thirty degree phase belt concept, including improved mmf waveform and fundamental distribution factor, with consequent reduced vibrations and improved efficiency. 4 figs.

Slavik, C.J.; Rhudy, R.G.; Bushman, R.E.

1997-11-11T23:59:59.000Z

233

Reduced vibration motor winding arrangement  

DOE Patents [OSTI]

An individual phase winding arrangement having a sixty electrical degree phase belt width for use with a three phase motor armature includes a delta connected phase winding portion and a wye connected phase winding portion. Both the delta and wye connected phase winding portions have a thirty electrical degree phase belt width. The delta and wye connected phase winding portions are each formed from a preselected number of individual coils each formed, in turn, from an unequal number of electrical conductor turns in the approximate ratio of .sqroot.3. The individual coils of the delta and wye connected phase winding portions may either be connected in series or parallel. This arrangement provides an armature winding for a three phase motor which retains the benefits of the widely known and utilized thirty degree phase belt concept, including improved mmf waveform and fundamental distribution factor, with consequent reduced vibrations and improved efficiency.

Slavik, Charles J. (Rexford, NY); Rhudy, Ralph G. (Scotia, NY); Bushman, Ralph E. (Lathem, NY)

1997-01-01T23:59:59.000Z

234

Hermetically sealed superconducting magnet motor  

DOE Patents [OSTI]

A hermetically sealed superconducting magnet motor includes a rotor separated from a stator by either a radial gap, an axial gap, or a combined axial and radial gap. Dual conically shaped stators are used in one embodiment to levitate a disc-shaped rotor made of superconducting material within a conduit for moving cryogenic fluid. As the rotor is caused to rotate when the field stator is energized, the fluid is pumped through the conduit.

DeVault, Robert C. (Knoxville, TN); McConnell, Benjamin W. (Knoxville, TN); Phillips, Benjamin A. (Benton Harbor, MI)

1996-01-01T23:59:59.000Z

235

Hermetically sealed superconducting magnet motor  

DOE Patents [OSTI]

A hermetically sealed superconducting magnet motor includes a rotor separated from a stator by either a radial gap, an axial gap, or a combined axial and radial gap. Dual conically shaped stators are used in one embodiment to levitate a disc-shaped rotor made of superconducting material within a conduit for moving cryogenic fluid. As the rotor is caused to rotate when the field stator is energized, the fluid is pumped through the conduit. 6 figs.

DeVault, R.C.; McConnell, B.W.; Phillips, B.A.

1996-07-02T23:59:59.000Z

236

Method for assessing in-service motor efficiency and in-service motor/load efficiency  

DOE Patents [OSTI]

A method and apparatus for assessing the efficiency of an in-service motor. The operating characteristics of the in-service motor are remotely measured. The operating characteristics are then applied to an equivalent circuit for electrical motors. Finally the equivalent circuit is evaluated to determine the performance characteristics of said in-service motor. Based upon the evaluation an individual is able to determine the rotor speed, power output, efficiency, and toque of the in-service motor. Additionally, an individual is able to confirm the calculations by comparing measured values with values obtained as a result of the motor equivalent circuit evaluation.

Kueck, John D. (Oak Ridge, TN); Otaduy, Pedro J. (Oak Ridge, TN)

1997-01-01T23:59:59.000Z

237

Investigation of Flux Linkage Profile Measurement Methods for Switched Reluctance Motors and Permanent Magnet  

E-Print Network [OSTI]

- 1 - Investigation of Flux Linkage Profile Measurement Methods for Switched Reluctance Motors for switched reluctance motors (SRM's) and permanent magnet motors (PMM's). Various measurement methods have reluctance motors, permanent magnet motors. I. INTRODUCTION Switched Reluctance Motors (SRM's) have very

Lu, Kaiyuan

238

Metal slits and liquid crystals at microwave frequencies  

Science Journals Connector (OSTI)

...the possible use of dual frequency materials to allow drive-on as well as drive-off. Unfortunately such dual-frequency materials have reduced...T Nomoto2002Microwave variable delay line using dual-frequency switching-mode liquid...

2006-01-01T23:59:59.000Z

239

Motorization, Vehicle Purchase and Use Behavior in China: A Shanghai Survey????????????????????????????  

E-Print Network [OSTI]

49: Motorized Two-wheeler / Motorcycle Use vs. Motorized98 Table 50: Motorized Two-wheeler / Motorcycle Use vs.Motorcycle Ownership 98 Table 51: Motorized Two-

Ni, Jason

2008-01-01T23:59:59.000Z

240

Extend the Operating Life of Your Motor  

Broader source: Energy.gov [DOE]

Certain components of motors degrade with time and operating stress. Electrical insulation weakens over time with exposure to voltage unbalance, over and undervoltage, voltage disturbances, and temperature. Contact between moving surfaces causes wear. Wear is affected by dirt, moisture, and corrosive fumes and is greatly accelerated when lubricant is misapplied, becomes overheated or contaminated, or is not replaced at regular intervals. When any components are degraded beyond the point of economical repair or replacement, the motorís economic life ends.

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Energy-Efficient Electric Motor Selection Handbook  

SciTech Connect (OSTI)

Substantial reductions in energy and operational costs can be achieved through the use of energy-efficient electric motors. A handbook was compiled to help industry identify opportunities for cost-effective application of these motors. It covers the economic and operational factors to be considered when motor purchase decisions are being made. Its audience includes plant managers, plant engineers, and others interested in energy management or preventative maintenance programs.

McCoy, Gilbert A.; Litman, Todd; Douglass, John G.

1990-10-01T23:59:59.000Z

242

Motor Systems Assessment Training, Including Use of the Motor Systems Tool Suite  

Broader source: Energy.gov (indexed) [DOE]

Motor Systems Assessment Training Motor Systems Assessment Training Presented by: Gilbert McCoy, PE Washington State University Extension Energy Program (360) 956-2086 mccoyg@energy.wsu.edu 2 Motor Systems Assessment Training 3 Motor Systems Assessment Training Department of Energy Information Resources U.S. DOE Industrial Technologies Program (ITP) BestPractices Website www.eere.energy.gov/industry/bestpractices EERE Information Center (877) 337-3463 Or www.eere.energy.gov/informationcenter 4 Motor Systems Assessment Training Big Picture Perspectives: Industrial Motor Systems Industrial motor systems: ÔŅĹ Are the single largest electrical end use category in the American economy ÔŅĹ Account for 23% of U.S. electrical sales. 5 Motor Systems Assessment Training Ultimate

243

Improving Motor and Drive System Performance  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

drives. Energy-Efficient Electric Motors and Their Applications, 2nd Edition Author: Jordan, H.E. Publisher: Springer Description: Evaluates the energy savings potential of...

244

Renault Samsung Motors | Open Energy Information  

Open Energy Info (EERE)

Renault Samsung Motors Place: Korea (Republic) Sector: Solar Product: Korea-based automobile manufacturer. The firm is also involved in solar project development. References:...

245

MagLab - Faraday Motor Tutorial  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

not long after Faraday's simple apparatus, was the next in a long evolutionary line of electric motors. Related Electricity & Magnetism Pages Interactive Java Tutorial: Barlow's...

246

Switched reluctance motor : design, simulation and control.  

E-Print Network [OSTI]

??This thesis presents a design method for a switched reluctance (SR) motor to optimise torque production for two types of 3 phase 6/4 poles SRMÖ (more)

Aljaism, Wadah A.

2007-01-01T23:59:59.000Z

247

MotorMaster+ Software Tool Brochure  

Broader source: Energy.gov [DOE]

This brochure provides information on AMO's MotorMaster+ software tool, including how it works, next steps, and how to access it.

248

Magnet Motor Corp | Open Energy Information  

Open Energy Info (EERE)

and producing PEMFC stacks and PEMFC systems since 1998. Together with Proton Motor Fuel Cell GMBH it develops and realize complete fuel cell drive systems for buses and...

249

Fluid Gravity Engineering Rocket motor flow analysis  

E-Print Network [OSTI]

Fluid Gravity Engineering Capability · Rocket motor flow analysis -Internal (performance) -External young scientists/engineers Fluid Gravity Engineering Ltd #12;

Anand, Mahesh

250

Mission Motors Company | Open Energy Information  

Open Energy Info (EERE)

Place: San Francisco, California Zip: 94103 Product: San Francisco-based electric Motorcycle manufacturer. References: Mission Motors Company1 This article is a stub. You can...

251

,"U.S. Sales to End Users, Total Refiner Motor Gasoline Sales Volumes"  

U.S. Energy Information Administration (EIA) Indexed Site

Users, Total Refiner Motor Gasoline Sales Volumes" Users, Total Refiner Motor Gasoline Sales Volumes" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description","# Of Series","Frequency","Latest Data for" ,"Data 1","Products for Refiner Gasoline Volumes",1,"Monthly","9/2013","1/15/1983" ,"Data 2","by Grade",3,"Monthly","9/2013","1/15/1983" ,"Data 3","by Formulation",3,"Monthly","9/2013","1/15/1994" ,"Release Date:","12/2/2013" ,"Next Release Date:","1/2/2014" ,"Excel File Name:","pet_cons_refmg_d_nus_vtr_mgalpd_m.xls"

252

3.1. MOTOR SYSTEM 35 3.1 Motor System  

E-Print Network [OSTI]

3.1. MOTOR SYSTEM 35 3.1 Motor System The motor system comprises the dynamic model of the fish fish's brain. Since our goal is to animate an animal realistically and at reasonable computational cost controllers by gleaning information from the fish biomechanics literature (Blake, 1983; Alexander, 1992

Toronto, University of

253

Abstract--There are two types of drivers in production machine systems: constant velocity (CV) motor and servo-motor.  

E-Print Network [OSTI]

the dynamic model of the five-bar hybrid mechanism including its electric motors. Section 3 presents) motor and servo-motor. If a system contains two drivers or more, among which some are of the CV motor while the other are the servo-motor, the system has the so-called hybrid driver architecture

Zhang, WJ "Chris"

254

High frequency rectenna  

DOE Patents [OSTI]

The invention provides an inexpensive array of rectifying antennas which employ field emission diodes for rectifying electromagnetic waves of microwave frequencies and higher frequencies.

Logan, B. Grant (Danville, CA); Orvis, William J. (Livermore, CA)

1991-01-01T23:59:59.000Z

255

Department of Electrical Engineering Fall 2009 Electridyne Motor  

E-Print Network [OSTI]

PENNSTATE Department of Electrical Engineering Fall 2009 Electridyne Motor Overview Our sponsored project was to design an elecrtic motor for an urban transportation vehicle, the challenges involved included research into motor design, consideration of the materials, and the electromagnetic parameters

Demirel, Melik C.

256

Buying an Energy-Efficient Electric Motor | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Buying an Energy-Efficient Electric Motor Buying an Energy-Efficient Electric Motor Efficiency is an important factor to consider when buying or rewinding an electric motor. This...

257

Alternative Fuels Data Center: MotorWeek Video Transcript  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

MotorWeek Video Transcript to someone by E-mail Share Alternative Fuels Data Center: MotorWeek Video Transcript on Facebook Tweet about Alternative Fuels Data Center: MotorWeek...

258

Motor Exhaust-related Occupations and Bladder Cancer  

Science Journals Connector (OSTI)

...Epidemiological Investigations Motor Exhaust-related Occupations...occupations with potential exposure to motor exhaust and bladder cancer risk...residentialhistory, sourceofdrinking water, fluid intake, use of hair...association between employment in a motor exhaust-related occupation...

Debra T. Silverman; Robert N. Hoover; Thomas J. Mason; and G. Marie Swanson

1986-04-01T23:59:59.000Z

259

Midwest Motor Systems Consortium- A Unique Business Partnership  

E-Print Network [OSTI]

The Midwest Motor Systems Consortium is a creative, new business partnership of motor systems users, suppliers, and other interested parties. It is unique in that it brings together all of the stakeholders in the motor systems market-with buyers...

Hackner, R.; Cockrill, C.

260

Rare-Earth-Free Traction Motor: Rare Earth-Free Traction Motor for Electric Vehicle Applications  

SciTech Connect (OSTI)

REACT Project: Baldor will develop a new type of traction motor with the potential to efficiently power future generations of EVs. Unlike todayís large, bulky EV motors which use expensive, imported rare-earth-based magnets, Baldorís motor could be light, compact, contain no rare earth materials, and have the potential to deliver more torque at a substantially lower cost. Key innovations in this project include the use of a unique motor design, incorporation of an improved cooling system, and the development of advanced materials manufacturing techniques. These innovations could significantly reduce the cost of an electric motor.

None

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Nanoconfined catalytic ŇngstrŲm-size motors  

E-Print Network [OSTI]

Chemically-powered synthetic micron and nano-scale motors that propel themselves in solution are being intensively studied because of the wide range of potential applications that exploit their directed motion. Recent experiments have shown that, even on the molecular scale, small-molecule catalysts and single enzyme molecules exhibit properties that have been attributed to self-propulsion. Simulations of very small {\\AA}ngstr\\"om-size synthetic motors in bulk solution have shown similar effects. Applications of such small motors in the cell or in microfluidic devices require knowledge of how these motors interact with boundaries. Molecular dynamics is used to investigate the properties of {\\AA}ngstr\\"om-size synthetic chemically-powered motors confined between walls separated by distances of tens of nanometers. Evidence for strong structural ordering of the motors between the walls, which reflects the finite size of solvent molecules and depends on solvent exclusion forces, is provided. Dynamical properties, such as average motor velocity, orientational relaxation and mean square displacement, are anisotropic and depend on the distance from the walls. This research presents information needed for potential applications that use these motors in the complex confined geometries encountered in biology and the laboratory.

Peter H. Colberg; Raymond Kapral

2015-01-13T23:59:59.000Z

262

DNA-Based Optomechanical Molecular Motor  

Science Journals Connector (OSTI)

A particularly rich and promising use of this force spectroscopy setup is for constructing molecular motors. ... The resulting structure?function insights are important for future DNA motor design. ... The quantum yield of the trans to cis isomerization using 365 nm (5.5 ◊ 10?19 J) photons is ?0.1, and hence, 10 of these photons are required per cycle. ...

Martin McCullagh; Ignacio Franco; Mark A. Ratner; George C. Schatz

2011-02-22T23:59:59.000Z

263

Oscillation control system for electric motor drive  

DOE Patents [OSTI]

A feedback system for controlling mechanical oscillations in the torsionally complaint drive train of an electric or other vehicle. Motor speed is converted in a processor to estimate state signals in which a plant model which are used to electronically modify thetorque commands applied to the motor.

Slicker, James M. (Union Lake, MI); Sereshteh, Ahmad (Union Lake, MI)

1988-01-01T23:59:59.000Z

264

Learning Motor Skills: From Algorithms to Robot  

E-Print Network [OSTI]

Learning Motor Skills: From Algorithms to Robot Experiments Erlernen Motorischer Fähigkeiten: Von Algorithmen zu Roboter-Experimenten Zur Erlangung des akademischen Grades Doktor-Ingenieur (Dr Motor Skills: From Algorithms to Robot Experiments Erlernen Motorischer Fähigkeiten: Von Algorithmen zu

265

A permit is required for ALL motorized vehicles parking on the Vanderbilt University Campus. Motorcycles, motorized bicycles, motor scooters and mopeds are  

E-Print Network [OSTI]

. Motorcycles, motorized bicycles, motor scooters and mopeds are required to display "U" permits. The cost. Motorcycle, motorized bicycle, motor scooter and moped parking areas can be found on the parking map (http://www.vanderbilt.edu/parking and click on "Maps") as designated by the motorcycle symbols. Parking is authorized only in spaces marked

Simaan, Nabil

266

A Five-Leg Inverter for Driving a Traction Motor and a Compressor Motor  

SciTech Connect (OSTI)

This paper presents an integrated inverter for speed control of a traction motor and a compressor motor to reduce the compressor drive cost in EV/HEV applications. The inverter comprises five phase-legs; three of which are for control of a three-phase traction motor and the remaining two for a two-phase compressor motor with three terminals. The common terminal of the two-phase motor is tied to the neutral point of the three-phase traction motor to eliminate the requirement of a third phase leg. Further cost savings are made possible by sharing the switching devices, dc bus filter capacitors, gate drive power supplies, and control circuit. Simulation and experimental results are included to verify that speed control of the two motors is independent from each other.

Su, Gui-Jia [ORNL; Hsu, John S [ORNL

2006-01-01T23:59:59.000Z

267

Improve Motor System Efficiency with MotorMaster+, Software Tools for Industry, Industrial Technologies Program (ITP) (Fact Sheet)  

SciTech Connect (OSTI)

This fact sheet describes how the Industrial Technologies Program MotorMaster+ software tool aids industrial plants with finding energy-efficient motor replacement options and managing motor systems.

Not Available

2008-12-01T23:59:59.000Z

268

Sandia National Laboratories: Sandia and General Motors: Advancing...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ClimateECAbout ECFacilitiesCRFSandia and General Motors: Advancing Clean Combustion Engines with Predictive Simulation Tools Sandia and General Motors: Advancing Clean Combustion...

269

When Should Inverter-Duty Motors Be Specified?  

SciTech Connect (OSTI)

This is one in a series of tip sheets to help manufacturers optimize their industrial motor and motor-driven systems.

Not Available

2008-07-01T23:59:59.000Z

270

Vision Industries dba Vision Motor Corp | Open Energy Information  

Open Energy Info (EERE)

Vision Motor Corp) Place: Santa Monica, California Zip: 90405 Product: Santa Monica-based electric vehicle manufacturer. References: Vision Industries (dba Vision Motor Corp)1...

271

A COMPRESSED AIR MOTOR SHAKER FOR USE IN SMALL ...  

Science Journals Connector (OSTI)

motors are readily available, the heat build-up precludes their use inside small incubators. One way of overcoming this is to place the electric motor outside the.

2000-02-10T23:59:59.000Z

272

Replacing an Oversized and Underloaded Electric Motor | Department...  

Broader source: Energy.gov (indexed) [DOE]

Replacing an Oversized and Underloaded Electric Motor Replacing an Oversized and Underloaded Electric Motor This fact sheet will assist in decisions regarding replacement of...

273

Improve Motor Operation at Off-Design Voltages | Department of...  

Broader source: Energy.gov (indexed) [DOE]

Selection and Application Guide - A Handbook for Industry Improving Motor and Drive System Performance - A Sourcebook for Industry Determining Electric Motor Load and Efficiency...

274

Electric Motors and Critical Materials | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Motors and Critical Materials Electric Motors and Critical Materials Presentation given at the EV Everywhere Grand Challenge Electric Drive (Power Electronics and Electric...

275

EV Everywhere Workshop: Electric Motors and Critical Materials...  

Broader source: Energy.gov (indexed) [DOE]

Electric Motors and Critical Materials Breakout Group Report EV Everywhere Workshop: Electric Motors and Critical Materials Breakout Group Report Presentation given at the EV...

276

Improving Motor and Drive System Performance: A Sourcebook for Industry  

SciTech Connect (OSTI)

This is one in a series of sourcebooks to assist industrial personnel in understanding and optimizing motors and motor-driven systems

Not Available

2008-09-01T23:59:59.000Z

277

Desenvolvimento experimental de um motor stirling tipo gama.  

E-Print Network [OSTI]

??O presente trabalho consiste no desenvolvimento experimental de um motor Stirling tipo gama. S„o apresentadas inicialmente as diferentes configuraÁűes deste tipo de motor (alfa, gamaÖ (more)

Vinicius Guimar„es da Cruz

2012-01-01T23:59:59.000Z

278

Intelligent design of sensorless Switched reluctance motor drives; -.  

E-Print Network [OSTI]

??The Switched Reluctance Motor SRM drive technology has gone newlinethrough steady and significant development over the last two decades The newlinesimplicity in both motor constructionÖ (more)

Marsaline Beno, M

2014-01-01T23:59:59.000Z

279

United States Industrial Motor-Driven Systems Market Assessment...  

Broader source: Energy.gov (indexed) [DOE]

Motor-Driven Systems Market Assessment: Charting a Roadmap to Energy Savings for Industry United States Industrial Motor-Driven Systems Market Assessment: Charting a Roadmap to...

280

Water contamination and colloidal stability of motor oils  

Science Journals Connector (OSTI)

Water contamination of motor oils during storage and use in low- ... of additives worsens the performance properties of the motor oils.

S. V. Korneev; V. M. Dudkin; A. V. Kolunin

2006-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Gas Mileage of 1984 Vehicles by American Motors Corporation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

4 American Motors Corporation Vehicles 4 American Motors Corporation Vehicles EPA MPG MODEL City Comb Hwy 1984 American Motors Corporation Eagle 4WD 4 cyl, 2.5 L, Manual 4-spd, Regular Gasoline Compare 1984 American Motors Corporation Eagle 4WD 19 City 20 Combined 22 Highway 1984 American Motors Corporation Eagle 4WD 4 cyl, 2.5 L, Manual 5-spd, Regular Gasoline Compare 1984 American Motors Corporation Eagle 4WD 19 City 21 Combined 23 Highway 1984 American Motors Corporation Eagle 4WD 6 cyl, 4.2 L, Automatic 3-spd, Regular Gasoline Compare 1984 American Motors Corporation Eagle 4WD 15 City 17 Combined 20 Highway 1984 American Motors Corporation Eagle 4WD 6 cyl, 4.2 L, Manual 4-spd, Regular Gasoline Compare 1984 American Motors Corporation Eagle 4WD 16 City 17 Combined 20 Highway 1984 American Motors Corporation Eagle 4WD 6 cyl, 4.2 L, Manual 5-spd, Regular Gasoline

282

Motor control and torque coordination of an electric vehicle actuated by two in-wheel motors  

Science Journals Connector (OSTI)

In this research, an electric vehicle actuated by two in-wheel DC motors is developed. By properly coordinating the motor torques, both drive-by-wire and electrical steering can be achieved. Two critical issues respectively related to the design of motor controllers and the coordination of the two motor torques under control saturation are investigated in this study. Firstly, as for the in-wheel motors that are used for driving and steering simultaneously, their operation covers a wider dynamic range that forward acceleration (deceleration), and reverse acceleration (deceleration) may occur alternately. To perform driving and steering smoothly and efficiently, each motor should be switched to an appropriate mode to generate the torque demanded. Secondly, during the high-speed maneuvering, the high back-emf voltage in the motor coil substantially reduces the motorís torque generating capability. Since the electrical steering depends on the differential torque of two wheels, when electrical steering is demanded in this case, torque/current saturation may occur in either one of the motors and the electrical steering performance could be seriously degraded. To address these issues, controllers of two levels are proposed. For the low-level controller (the motor controller), it operates the motor automatically in an appropriate mode for performance and efficiency consideration. An input transformation is introduced to cancel the nonlinearity in current dynamics so as to control the motor torque easily and precisely regardless of mode switching. For the high-level controller (the torque coordination controller), besides generating reference commands to the low-level controllers, during control saturation it can also properly re-distributes control signals to maintain consistent steering performance and provides compensation for integrator windup. The control system is implemented and the performance is experimentally and numerically validated.

Feng-Kuang Wu; T.-J. Yeh; Chun-Feng Huang

2013-01-01T23:59:59.000Z

283

Chapter 18: Variable Frequency Drive Evaluation Protocol. The...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

by Pat Corkery, NREL 16560, photo by Dennis Schroeder, NREL 17613, photo by Dean Armstrong, NREL 17436, photo by Pat Corkery, NREL 17721. NREL prints on paper that contains...

284

Conserving Energy in Blast Freezers Using Variable Frequency Drives  

E-Print Network [OSTI]

; Freezing Time vs Velocity 6 7 8 9 10 11 12 13 14 0 500 1000 1500 Air Velocity (fpm) Freezing Time (hr) Freezing Time vs Carton Thickness 6 7 8 9 10 11 12 13 14 2 2.5 3 3.5 4 4.5 Carton Thickness (in.) Freezing Time (hr...: - Low-stage: 14? Hg vacuum (-50įF); - Intermediate stage controlled to 14 psig ( -2.5įF) and fluctuating some with load (increasing with higher load); - High-stage operates between 157 and 167 psig (87į and 91įF). An automatic monitoring...

Kolbe, E.; Ling, Q.; Wheeler, G.

2004-01-01T23:59:59.000Z

285

List of Motors Incentives | Open Energy Information  

Open Energy Info (EERE)

Incentives Incentives Jump to: navigation, search The following contains the list of 371 Motors Incentives. CSV (rows 1 - 371) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active AEP (Central and North) - CitySmart Program (Texas) Utility Rebate Program Texas Commercial Industrial Institutional Local Government Schools Boilers Central Air conditioners Chillers Comprehensive Measures/Whole Building Custom/Others pending approval Energy Mgmt. Systems/Building Controls Furnaces Heat pumps Lighting Lighting Controls/Sensors Motor VFDs Motors Roofs Windows Yes AEP (Central, North and SWEPCO) - Commercial Solutions Program (Texas) Utility Rebate Program Texas Commercial Industrial Institutional Local Government Nonprofit Schools State Government Tribal Government Boilers

286

Optimization of induction motor efficiency. Volume 3. Experimental comparison of three-phase standard motors with Wanlass motors. Final report  

SciTech Connect (OSTI)

Researchers conducted comprehensive laboratory tests to evaluate the effectiveness of the Wanlass connection in improving motor efficiency. On the basis of these tests, they found no reason to conclude that such a connection is more efficient than the standard connection.

Fuchs, E.F.

1985-12-01T23:59:59.000Z

287

Synchronous motor with soft start element formed between the motor rotor and motor output shaft to successfully synchronize loads that have high inertia and/or high torque  

DOE Patents [OSTI]

A line-start synchronous motor has a housing, a rotor shaft, and an output shaft. A soft-start coupling portion is operatively coupled to the output shaft and the rotor shaft. The soft-start coupling portion is configurable to enable the synchronous motor to obtain synchronous operation and to drive, at least near synchronous speed during normal steady state operation of the motor, a load having characteristics sufficient to prevent obtaining normal synchronous operation of the motor when the motor is operatively connected to the load in the absence of the soft-start coupling. The synchronous motor is sufficiently rated to obtain synchronous operation and to drive, at least near synchronous speed during normal steady state operation of the motor, a load having characteristics sufficient to prevent obtaining normal synchronous operation of the motor when the motor is operatively connected to the load in the absence of the soft-start coupling.

Umans, Stephen D; Nisley, Donald L; Melfi, Michael J

2014-10-28T23:59:59.000Z

288

Report on Toyota Prius Motor Thermal Management  

SciTech Connect (OSTI)

In the current hybrid vehicle market, the Toyota Prius drive system is considered the leader in electrical, mechanical, and manufacturing innovations. It is a significant accomplishment that Toyota is able to manufacture and sell the vehicle for a profit. The Toyota Prius traction motor design approach for reducing manufacturing costs and the motor s torque capability have been studied and tested. The findings were presented in two previous Oak Ridge National Laboratory (ORNL) reports. The conclusions from this report reveal, through temperature rise tests, that the 2004 Toyota Prius (THSII) motor is applicable only for use in a hybrid automobile. It would be significantly undersized if used in a fuel cell vehicle application. The power rating of the Prius motor is limited by the permissible temperature rise of the motor winding (170 C) and the motor cooling oil (158 C). The continuous ratings at base speed (1200 rpm) with different coolant temperatures are projected from test data at 900 rpm. They are approximately 15 kW with 105 C coolant and 21 kW with 35 C coolant. These continuous ratings are much lower than the 30 kW specified as a technical motor target of the U.S. Department of Energy FreedomCAR Program. All tests were conducted at about 24 C ambient temperature. The load angle of each torque adjustment was monitored to prevent a sudden stop of the motor if the peak torque were exceeded, as indicated by the load angle in the region greater than 90 electrical degrees. For peak power with 400 Nm torque at 1200 rpm, the permissible running time depends upon the initial winding temperature condition. The projected rate of winding temperature rise is approximately 2.1 C/sec. The cooling-oil temperature does not change much during short peak power operation. For light and medium load situations, the efficiency varies from 80% to above 90%, and the power factor varies from 70% to above 90%, depending on the load and speed. When the motor is loaded heavily near the peak-torque (400-Nm) region, the efficiency goes down to the 40-50% range, and the power factor is nearly 100%. The efficiency is not a major concern at the high-torque region. The water-ethylene-glycol heat exchanger attached to the motor is small. During continuous operation, it dissipates about 76% of the total motor heat loss with 35 C coolant. The heat exchanger is less effective when the coolant temperature increases. With 75 C coolant, the heat exchanger dissipates about 38% of the motor heat. When the coolant temperature is 105 C, the heat exchanger not only stops cooling the motor but also adds heat to the large motor housing that acts as an air-cooled heat sink. From start to the base speed, 400 Nms of torque can be produced by the Prius motor with a reasonably low stator current. However, the permissible running time of the motor depends on the load drawn from the motor and the coolant temperature. In the Toyota Prius hybrid configuration, if the motor gets too hot and cannot keep running, the load can be shifted back to the engine. The motor acts to improve the system efficiency without being overly designed. A detailed thermal model was developed to help predict the temperature levels in key motor components. The model was calibrated and compared with the experimentally measured temperatures. Very good agreement was obtained between model and experiment. This model can now be used to predict the temperature of key motor components at a variety of operating conditions and to evaluate the thermal characteristics of new motor designs. It should be pointed out that a fuel-cell motor does not have an engine to fall back on to provide the needed wheel power. Therefore, the design philosophy of a fuel-cell motor is very different from that of a hybrid Prius motor. Further thermal management studies in the high-speed region of the Prius motor, fed by its inverter, are planned.

Hsu, J.S.

2005-02-11T23:59:59.000Z

289

Soft switched high frequency ac-link converter  

E-Print Network [OSTI]

Variable frequency drives typically have employed dc voltage or current links for power distribution between the input and output converters and as a means to temporarily store energy. The dc link based power conversion systems have several inherent...

Balakrishnan, Anand Kumar

2009-05-15T23:59:59.000Z

290

Convective Cooling and Passive Stack Improvements in Motors (Presentation)  

SciTech Connect (OSTI)

This presentation discusses current research at NREL in convective cooling and passive stack improvements in motors.

Bennion, K.

2014-06-01T23:59:59.000Z

291

A University of Alabama Axial-Gap Electric Motor Developmenty  

E-Print Network [OSTI]

CAVT A University of Alabama Axial-Gap Electric Motor Developmenty Research Center OBJECTIVE ­ Develop axial gap permanent-magnet electric Axial motor ­ Develop axial gap permanent-magnet electric motor topologies with high torque and power densities MOTIVATION ­ Axial-gap ("pancake") motors have

Carver, Jeffrey C.

292

Semiconductor Alternating-Current Motor Drives and Energy Conservation  

Science Journals Connector (OSTI)

...60 hertz, and thus the standard two-pole motor runs at...1979 773 Commercial ex. HVAC motor drives 27% In ex. HVAC 5% Ind. and comm. HVAC motors 7 Residents, Elec...efficiently modu-late a standard induction motor. Al-though...

D. J. BenDaniel; E. E. David Jr.

1979-11-16T23:59:59.000Z

293

The LatestThe LatestThe LatestThe Latest,,,, Quick Motor EvaluationQuick Motor EvaluationQuick Motor EvaluationQuick Motor Evaluation Myway Plus Development of Specialized Equipment  

E-Print Network [OSTI]

is different from the mainstream PM motor, the rotor does not use neodymium but electrically magnetized body. The simple structure and half price of PM motor equipment is highly anticipated in hybrid electric vehicleThe LatestThe LatestThe LatestThe Latest,,,, Quick Motor EvaluationQuick Motor Evaluation

Kambhampati, Patanjali

294

Using voluntary motor commands to inhibit involuntary arm movements  

Science Journals Connector (OSTI)

...output of the endogenous motor generator) the excitatory motor outputs...associated with a persistent motor generator is not entirely new. For...voluntary contraction in the induction phase creates a new sensory...persistent Kohnstamm motor generator for postural control [30...

2014-01-01T23:59:59.000Z

295

The Paris Motor Show | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Paris Motor Show Paris Motor Show The Paris Motor Show October 4, 2010 - 9:39am Addthis David Sandalow at the Paris Auto Show | DOE photo David Sandalow at the Paris Auto Show | DOE photo David Sandalow David Sandalow Former Under Secretary of Energy (Acting) and Assistant Secretary for Policy & International Affairs At the Paris Motor Show today, electric cars are everywhere. Chevrolet is showing off the Volt, its plug-in hybrid due in U.S. showrooms this December. (Motown music blared as a Chevy rep told me all about the car's performance.) Nissan is displaying the Leaf, its all-electric sedan scheduled to roll off assembly lines in Tennessee starting in 2012. Volvo has new plug-in models. So do Saab, Peugot and other European manufacturers. And as I walked through the gates in a huge crowd, the first

296

The Paris Motor Show | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

The Paris Motor Show The Paris Motor Show The Paris Motor Show October 4, 2010 - 9:39am Addthis David Sandalow at the Paris Auto Show | DOE photo David Sandalow at the Paris Auto Show | DOE photo David Sandalow David Sandalow Former Under Secretary of Energy (Acting) and Assistant Secretary for Policy & International Affairs At the Paris Motor Show today, electric cars are everywhere. Chevrolet is showing off the Volt, its plug-in hybrid due in U.S. showrooms this December. (Motown music blared as a Chevy rep told me all about the car's performance.) Nissan is displaying the Leaf, its all-electric sedan scheduled to roll off assembly lines in Tennessee starting in 2012. Volvo has new plug-in models. So do Saab, Peugot and other European manufacturers. And as I walked through the gates in a huge crowd, the first

297

Products of motor burnout. Final report  

SciTech Connect (OSTI)

The Montreal Protocol of 1987 effectively banned a long list of chlorofluorocarbons (CFCs) traditionally used in air conditioning and refrigeration applications. The refrigeration and air conditioning industries have responded by developing and testing new, alternative refrigerants that are less damaging to the atmosphere upon release. Despite a reputation for quality and reliability, air conditioning systems do occasionally fail. One of the more common failure modes in a hermetic system is a motor burnout. Motor burnouts can occur by various mechanisms. One of the most common scenarios is a locked motor rotor, which may result from a damaged bearing. The resulting electrical motor burnout is caused by overheating of the locked rotor and subsequent failure of the insulation. This is primarily a thermal breakdown process.

Hawley-Fedder, R.; Goerz, D.; Koester, C.; Wilson, M.

1996-03-30T23:59:59.000Z

298

Hybrid Turbocharger with Innovative Electric Motor  

Science Journals Connector (OSTI)

For more than ten years, the idea is pursued to support the charging process temporarily by the help of electric motors. The basic idea was to decouple the ... increase the number of revolutions primarily by the

Dr.-Ing. Holger GŲdeke; Ing. Kurt Prevedel

2014-03-01T23:59:59.000Z

299

Mechanical characteristic of submersible asynchronous electric motor  

Science Journals Connector (OSTI)

More accurate torque-sleep formulas have been developed based on the equivalent circuit of a multicontour induction motor (IM). Methods of taking into account the saturation and skin effects on machine paramet...

Yu. Z. Kovalev; A. Yu. Kovalev; E. V. Poshvin

2010-10-01T23:59:59.000Z

300

Case Histories of Energy Efficient Motors  

E-Print Network [OSTI]

A number of new energy efficient (EE) motors have been installed at the Port Neches SBR plant in the past few years. Some of these installations presented many problems. The measurement of dollars saved has been difficult. Easy installations...

Riley, J. C.; Comiskey, W. T

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Allium carbohydrates. XV. Polysaccharides from Allium motor  

Science Journals Connector (OSTI)

The content of carbohydrates in Allium motor...was studied as a function of vegetation period. The qualitative and quantitative compositions and physical chemical properties of sugars soluble in alcohol, water-so...

M. A. Khodzhaeva; A. A. Razhabova; G. R. Muzaffarova

2006-09-01T23:59:59.000Z

302

Submersible motor pumps for mine drainage applications  

Science Journals Connector (OSTI)

After briefly describing the basic design of the submersible motor pump and listing advantages it offers for mining applications, the latest developments for meeting the, in many cases, extreme demands relatin...

Dieter-Heinz Hellmann Dr. Ing.Ö

1986-03-01T23:59:59.000Z

303

Improving the efficiency of electric motor systems: Moving beyond efficient motors  

SciTech Connect (OSTI)

Electric motors operating in the US consume more than half of the nation's electricity. Electric utilities were among the first groups to begin offering programs to promote efficiency in electric motors. A 1994 Electric Power Research Institute (EPRI) survey of utility demand-side management (DSM) programs found 151 efficient-motors and drives programs being offered by 95 utilities in the US. The most common programs have been prescriptive rebates for the purchase of high-efficiency motors. While many of these programs have been popular and successful, their cost is an issue of contention with some industrial consumer groups and within utilities attempting to reduce program costs. With the minimum motor efficiency regulations in the Energy Policy Act of 1992 (EPAct) set to go into effect for most products in October 1997, utilities will need to move beyond these simple high-efficiency motor rebate programs if they are to continue to offer motor programs to their customers. The focus will also have to shift from simply motors to motor-system issues. As a 1993 US Department of Energy (DOE)-sponsored motor-system roundtable identified, motor-system expertise is not widely available, and many electric utilities will need assistance to develop and implement new programs. It is thus important that information be made available to these utilities on how to analyze customers' motor-systems needs, what program designs will most likely meet these needs, what resources they will need to implement their programs, and where to find those resources. DOE's Motor Challenge has already been identifying or developing many of these resources, and these are already being used by some utilities. If utilities are provided a program context, more of them can make better use of these resources and achieve success from their own standpoint (e.g., increased customer satisfaction and improved customer retention), from the customers' standpoint (e.g., lower motor-system costs and improved performance), and from the national standpoint (e.g., reduced motorsystem energy consumption and lower carbon emissions). The American Council for an Energy-Efficient Economy (ACEEE) has begun to establish this context by analyzing utility motor-systems programs. This work builds upon past ACEEE analyses of other utility DSM programs and ACEEE's extensive involvement in the technical aspects and design of programs involving electric motor systems.

Elliott, R.N.; Pye, M.; Nadel, S.

1997-07-01T23:59:59.000Z

304

An Improved Fault-Tolerant Control Scheme for PWM Inverter-Fed Induction Motor-Based EVs  

E-Print Network [OSTI]

and simulations on an electric vehicle are carried-out using a European urban driving cycle to show for such systems. In particular, voltage source inverters are a key component of these electric motor drive systems of an electric vehicle on the variable-speed ac drives and particularly on the power inverter is rapidly

Paris-Sud XI, Université de

305

Equivalent Circuit Modeling of Hysteresis Motors  

SciTech Connect (OSTI)

We performed a literature review and found that many equivalent circuit models of hysteresis motors in use today are incorrect. The model by Miyairi and Kataoka (1965) is the correct one. We extended the model by transforming it to quadrature coordinates, amenable to circuit or digital simulation. 'Hunting' is an oscillatory phenomenon often observed in hysteresis motors. While several works have attempted to model the phenomenon with some partial success, we present a new complete model that predicts hunting from first principles.

Nitao, J J; Scharlemann, E T; Kirkendall, B A

2009-08-31T23:59:59.000Z

306

Eastern Frequency Response Study  

SciTech Connect (OSTI)

This study was specifically designed to investigate the frequency response of the Eastern Interconnection that results from large loss-of-generation events of the type targeted by the North American Electric Reliability Corp. Standard BAL-003 Frequency Response and Frequency Bias Setting (NERC 2012a), under possible future system conditions with high levels of wind generation.

Miller, N.W.; Shao, M.; Pajic, S.; D'Aquila, R.

2013-05-01T23:59:59.000Z

307

Alternative Fuels Data Center: Alternative Fuel Motor Carrier Fuel Tax  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Fuel Motor Fuel Motor Carrier Fuel Tax to someone by E-mail Share Alternative Fuels Data Center: Alternative Fuel Motor Carrier Fuel Tax on Facebook Tweet about Alternative Fuels Data Center: Alternative Fuel Motor Carrier Fuel Tax on Twitter Bookmark Alternative Fuels Data Center: Alternative Fuel Motor Carrier Fuel Tax on Google Bookmark Alternative Fuels Data Center: Alternative Fuel Motor Carrier Fuel Tax on Delicious Rank Alternative Fuels Data Center: Alternative Fuel Motor Carrier Fuel Tax on Digg Find More places to share Alternative Fuels Data Center: Alternative Fuel Motor Carrier Fuel Tax on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Alternative Fuel Motor Carrier Fuel Tax Effective January 1, 2014, a person who operates a commercial motor vehicle

308

Halbach array DC motor/generator  

DOE Patents [OSTI]

A new configuration of DC motor/generator is based on a Halbach array of permanent magnets. This motor does not use ferrous materials so that the only losses are winding losses and losses due to bearings and windage. An "inside-out" design is used as compared to a conventional motor/generator design. The rotating portion, i.e., the rotor, is on the outside of the machine. The stationary portion, i.e., the stator, is formed by the inside of the machine. The rotor contains an array of permanent magnets that provide a uniform field. The windings of the motor are placed in or on the stator. The stator windings are then "switched" or "commutated" to provide a DC motor/generator much the same as in a conventional DC motor. The commutation can be performed by mechanical means using brushes or by electronic means using switching circuits. The invention is useful in electric vehicles and adjustable speed DC drives.

Merritt, Bernard T. (Livermore, CA); Dreifuerst, Gary R. (Livermore, CA); Post, Richard F. (Walnut Creek, CA)

1998-01-01T23:59:59.000Z

309

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System  

E-Print Network [OSTI]

of the test, the induction generator and variable frequencyprovided to induction motor/generator (Hz) % baseFrequency:the induction motor is instead acting as a generator, the

Norwood, Zachary Mills

2011-01-01T23:59:59.000Z

310

Modeling of Electronically Commutated Motor Controlled Fan-powered Terminal Units  

E-Print Network [OSTI]

Feet Per Minute ECM Electronically Commutated Motor FPTU Fan Powered Terminal Unit Pdown Downstream Static Pressure PF Power Factor Pup Upstream Static Pressure SCR Silicon Controlled Rectifier THD Total Harmonic Distortion VAV Variable Air... parallel unit pressurizes the FPTU causing some of the primary air to leak out of the unit. Another difference between them is that series terminal units allow the primary air system to operate at a lower static pressure because the terminal unit fan...

Edmondson, Jacob Lee

2011-02-22T23:59:59.000Z

311

Design of a variable reluctance asymmetric stepping millimotor  

SciTech Connect (OSTI)

This paper reports on the design, simulation, and preliminary testing of a three phase variable reluctance stepping motor. This motor is pancake-shaped with an overall outside diameter of 8 mm and a height of 3 mm. The outside diameter of the rotor is 4.7 mm. The rotor and stators occupy 2 mm of the height with the remaining 1 mm reserved for a 6:1 planetary gear reductor. The rotor and stators were constructed of Hyperco 50 using conventional miniature machining. The reductor was assembled using copper and PMMA (polymethylmethacrylate) components that were constructed using the LIGA (Lithographic Galvanoformung Abformung) microfabrication process. The maximum measured stall torque of the motor without the reductor is 0.47mNm at 4W and the maximum speed is 2,400 rpm.

GARCIA,ERNEST J.; GREENWOOD,WILLIAM H.; OLIVER,ANDREW D.

2000-06-01T23:59:59.000Z

312

,"U.S. Motor Gasoline Prices"  

U.S. Energy Information Administration (EIA) Indexed Site

Prices" Prices" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description","# Of Series","Frequency","Latest Data for" ,"Data 1","U.S. Motor Gasoline Prices",6,"Monthly","9/2013","1/15/1983" ,"Release Date:","12/2/2013" ,"Next Release Date:","1/2/2014" ,"Excel File Name:","pet_pri_allmg_c_nus_epm0_dpgal_m.xls" ,"Available from Web Page:","http://www.eia.gov/dnav/pet/pet_pri_allmg_c_nus_epm0_dpgal_m.htm" ,"Source:","Energy Information Administration" ,"For Help, Contact:","infoctr@eia.gov" ,,"(202) 586-8800",,,"12/2/2013 2:33:46 AM"

313

Frequency selective infrared sensors  

DOE Patents [OSTI]

A frequency selective infrared (IR) photodetector having a predetermined frequency band. The exemplary frequency selective photodetector includes: a dielectric IR absorber having a first surface and a second surface substantially parallel to the first surface; an electrode electrically coupled to the first surface of the dielectric IR absorber; and a frequency selective surface plasmonic (FSSP) structure formed on the second surface of the dielectric IR absorber. The FSSP structure is designed to selectively transmit radiation in the predetermined frequency band that is incident on the FSSP structure substantially independent of the angle of incidence of the incident radiation on the FSSP structure.

Davids, Paul; Peters, David W

2013-05-28T23:59:59.000Z

314

Frequency selective infrared sensors  

SciTech Connect (OSTI)

A frequency selective infrared (IR) photodetector having a predetermined frequency band. The exemplary frequency selective photodetector includes: a dielectric IR absorber having a first surface and a second surface substantially parallel to the first surface; an electrode electrically coupled to the first surface of the dielectric IR absorber; and a frequency selective surface plasmonic (FSSP) structure formed on the second surface of the dielectric IR absorber. The FSSP structure is designed to selectively transmit radiation in the predetermined frequency band that is incident on the FSSP structure substantially independent of the angle of incidence of the incident radiation on the FSSP structure.

Davids, Paul; Peters, David W

2014-11-25T23:59:59.000Z

315

Solar powered induction motor-driven water pump operating on a desert well, simulation and field tests  

Science Journals Connector (OSTI)

A photovoltaic-powered water pumping system, employing an induction motor pump, capable of supplying a daily average of 50†m3 at 37-m head has been developed. The system was installed on a desert well in Jordan, where: the average solar radiation amount to 5.5†kW†h/m3/day, to provide the Bedouins living in the well area with drinking water. A mathematical model to enable testing the system performance by computer simulation was developed. This model allows the representation of motor torque in function of speed (and slip) at different supply frequencies, as well as the flow rate and efficiency of the system in function of supply frequency and pumping head. Prior to its installation on the desert well, the system performance, in accordance with frequency and head, was thoroughly tested in the laboratory. As illustrated in this paper, simulation and laboratory testing results are well matched. At constant pumping head, the flow rate is proportional to the supply frequency of the motor. At constant flow rate, the pumping head is proportional to the supply frequency squared only in the range below the peak efficiency of the pump. For higher flow rate values, a special algorithm based on the experimental results could be developed. Higher system efficiency is achievable at higher frequency. It is advisable to operate the motor pump at the nominal frequency, flow rate and head corresponding to maximum efficiency. Long-term field testing of the system shows that it is reliable and has an overall efficiency exceeding 3%, which is comparable to the highest efficiencies reported elsewhere for solar powered pumps.

Abdel-Karim Daud; Marwan M. Mahmoud

2005-01-01T23:59:59.000Z

316

Digital Control of Resonant Converters: Enhancing Frequency Resolution by Dithering  

E-Print Network [OSTI]

-resolution frequency drive when the quality factor of the network is high or to avoid limit cycle oscillations resolution enhancer for resonant network drive. I. INTRODUCTION In a variety of applications, variable ballasts piezoelectric devices) [1-3]. In such cases, the frequency resolution of the drive is crucial

317

High Frequency Effects of Variable Frequency Drives (VFD) on Electrical Submersible Pump (ESP) Systems  

E-Print Network [OSTI]

................................................................................................ 71 Table 10: Case III-B Result .............................................................................................. 72 Table 11: Case IV-A Result...

Ozkentli, Esra

2012-10-19T23:59:59.000Z

318

Alternative Fuels Data Center: Natural Gas Motor Vehicle Fuel Promotion  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Natural Gas Motor Natural Gas Motor Vehicle Fuel Promotion to someone by E-mail Share Alternative Fuels Data Center: Natural Gas Motor Vehicle Fuel Promotion on Facebook Tweet about Alternative Fuels Data Center: Natural Gas Motor Vehicle Fuel Promotion on Twitter Bookmark Alternative Fuels Data Center: Natural Gas Motor Vehicle Fuel Promotion on Google Bookmark Alternative Fuels Data Center: Natural Gas Motor Vehicle Fuel Promotion on Delicious Rank Alternative Fuels Data Center: Natural Gas Motor Vehicle Fuel Promotion on Digg Find More places to share Alternative Fuels Data Center: Natural Gas Motor Vehicle Fuel Promotion on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Natural Gas Motor Vehicle Fuel Promotion An eight member Natural Gas Fuel Board (Board) was created to advise the

319

Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Credit  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Fuel Cell Motor Fuel Cell Motor Vehicle Tax Credit to someone by E-mail Share Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Credit on Facebook Tweet about Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Credit on Twitter Bookmark Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Credit on Google Bookmark Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Credit on Delicious Rank Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Credit on Digg Find More places to share Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Credit on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Fuel Cell Motor Vehicle Tax Credit A tax credit of up to $4,000 is available for the purchase of qualified

320

Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Deduction  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Fuel Cell Motor Fuel Cell Motor Vehicle Tax Deduction to someone by E-mail Share Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Deduction on Facebook Tweet about Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Deduction on Twitter Bookmark Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Deduction on Google Bookmark Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Deduction on Delicious Rank Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Deduction on Digg Find More places to share Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Deduction on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Fuel Cell Motor Vehicle Tax Deduction A taxpayer is eligible for a $2,000 tax deduction for the purchase of a

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

E-Print Network 3.0 - acute vocal variability Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

phonation Patrick Mergella) Summary: upon variation in some other variable, such as frequency or the angle of the vocal membranes... Modeling the role of nonhuman vocal membranes...

322

Changes in hydrological extremes and climate variability in the Severn Uplands.  

E-Print Network [OSTI]

??Hydrological extremes within the UK have increased in intensity, frequency and persistence over recent years and are predicted to increase in variability throughout the 21stÖ (more)

Biggs, Eloise M.

2009-01-01T23:59:59.000Z

323

Directional Transport by Nonprocessive Motor Proteins on Fascin-Cross-Linked Actin Arrays  

Science Journals Connector (OSTI)

motors, in particular motor proteins, are ideally suited to introduce chem. ... The movement of actin-myosin biomolecular linear motor under AC electric fields: An experimental study ...

Yongkuk Lee; Parviz Famouri

2013-07-02T23:59:59.000Z

324

E-Print Network 3.0 - ameliorate motor performance Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

sensory feedback and motor prediction to estimate the current... Magazine R729 Primer Motor prediction Daniel M. Wolpert* and J. Randall Flanagan The concept... of motor...

325

The Impact of Motor Vehicle Operation on Water Quality: A Premilinary Assessment  

E-Print Network [OSTI]

$) for the U.S. Water externalities from motor vehicles arepolicies addressing water pollution from motor vehicles areCosts Quantifying the water externalities of motor vehicle

Nixon, Hillary; Saphores, Jean-Daniel

2003-01-01T23:59:59.000Z

326

Impacts of motor vehicle operation on water quality - Clean-up Costs and Policies  

E-Print Network [OSTI]

preventing water pollution from motor vehicles would be muchNon-point Source Water Pollution from Motor Vehicles Motorof controlling water pollution from motor vehicles. For

Nixon, Hilary; Saphores, Jean-Daniel M

2007-01-01T23:59:59.000Z

327

The Impacts of Motor Vehicle Operation on Water Quality: A Preliminary Assessment  

E-Print Network [OSTI]

$) for the U.S. Water externalities from motor vehicles arepolicies addressing water pollution from motor vehicles areCosts Quantifying the water externalities of motor vehicle

Nixon, Hilary; Saphores, Jean-Daniel M

2003-01-01T23:59:59.000Z

328

Frequency Combs for Astronomy  

Science Journals Connector (OSTI)

For the first time a mode filtered frequency comb has been used to calibrate an astronomical spectrometer online. Solar and calibration spectra have been recorded simultaneously.

Wilken, Tobias; Hšnsch, Theodor W; Udem, Thomas; Steinmetz, Tilo; Holzwarth, Ronald; Araujo-Hauck, Constanza; Pasquini, Luca; D'Odorico, Sandro; Manescau, Antonio; Murphy, Michael T; Kentischer, Thomas; Schmidt, Wolfgang

329

Diagnostic for two-mode variable valve activation device  

DOE Patents [OSTI]

A method is provided for diagnosing a multi-mode valve train device which selectively provides high lift and low lift to a combustion valve of an internal combustion engine having a camshaft phaser actuated by an electric motor. The method includes applying a variable electric current to the electric motor to achieve a desired camshaft phaser operational mode and commanding the multi-mode valve train device to a desired valve train device operational mode selected from a high lift mode and a low lift mode. The method also includes monitoring the variable electric current and calculating a first characteristic of the parameter. The method also includes comparing the calculated first characteristic against a predetermined value of the first characteristic measured when the multi-mode valve train device is known to be in the desired valve train device operational mode.

Fedewa, Andrew M

2014-01-07T23:59:59.000Z

330

Non-Motorized Travel Study.pub  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Motorized Travel Study: Motorized Travel Study: Identifying Factors that Influence Communities to Walk and Bike and to Examine Why, or Why Not, Travelers Walk and Bike in Their Communities Oak Ridge National Laboratory managed by UT-Battelle, LLC for the U.S. Department of Energy under Contract number DE-AC05-00OR22725 Research Areas Freight Flows Passenger Flows Supply Chain Efficiency Transportation: Energy Environment Safety Security Vehicle Technologies Research Brief T he idea of livable communities suggests that people should have the option to utilize non-motorized travel (NMT), specifically walking and bicycling, to conduct their daily tasks. Forecasting personal travel by walk and bike is necessary as part of regional transportation planning, and requires fine

331

Design and Operation of a 4kW Linear Motor Driven Pulse Tube Cryocooler  

Science Journals Connector (OSTI)

A 4 kW electrical input Linear Motor driven pulse tube cryocooler has successfully been designed built and tested. The optimum operation frequency is 60 Hz with a design refrigeration of >200 W at 80 K. The design exercise involved modeling and optimization in DeltaE software. Load matching between the cold head and linear motor was achieved by careful sizing of the transfer tube. The cryocooler makes use of a dual orifice inertance network and a single compliance tank for phase optimization and streaming suppression in the pulse tube. The in?line cold head design is modular in structure for convenient change?out and re?assembly of various components. The Regenerator consists of layers of two different grades of wire?mesh. The Linear motor is a clearance seal dual opposed piston design from CFIC Inc. Initial results have demonstrated the refrigeration target of 200 W by liquefying Nitrogen from an ambient temperature and pressure. Overall Carnot efficiencies of 13% have been achieved and efforts to further improve efficiencies are underway. Linear motor efficiencies up to 84% have been observed.

J. H. Zia

2004-01-01T23:59:59.000Z

332

Adaptive wavelet transform for vibration signal modelling and application in fault diagnosis of water hydraulic motor  

Science Journals Connector (OSTI)

There has been an increasing application of water hydraulics in industries due to growing concern on the environmental, health and safety issues. The fault diagnosis of water hydraulic motor is important for improving water hydraulic system reliability and performance. In this paper, fault diagnosis of water hydraulic motor in water hydraulic system is investigated based on adaptive wavelet analysis. A novel method for modelling the vibration signal based on the adaptive wavelet transform (AWT) is proposed. The linear combination of wavelets is introduced as wavelet itself and adapted for the particular vibration signal, which goes beyond adapting parameters of a fixed-shape wavelet. The AWT procedure based on the parametric optimisation by genetic algorithm (GA) is developed. The model-based method by AWT is applied to extract the features in the fault diagnosis of the water hydraulic motor. This technique for de-noising the corrupted simulation signal shows that it can improve the signal-to-noise ratio of the vibration signal. The results of the experimental signal demonstrate the characteristic vibration signal details in fine resolution. The magnitude plots of the continuous wavelet transform (CWT) show the characteristic signal's energy in time and frequency domain which can be used as feature values for fault diagnosis of water hydraulic motor.

H.X. Chen; Patrick S.K. Chua; G.H. Lim

2006-01-01T23:59:59.000Z

333

Soft-commutated direct current motor  

DOE Patents [OSTI]

A method and circuit is disclosed for soft-commutation of a direct current (DC) motor. An attenuation circuit is connected through auxiliary brushes A, A[prime], B and B[prime] to the commutator (16) to drain circuit from successive armature coils (15) before the main brushes (27, 28) disconnects from each of the coils (15). This prevents the spark generation that normally occurs in conventional DC motors. The attenuation circuit may also be connected before energization of the coil (15) for a soft turning on operation. 13 figs.

Hsu, J.S.

1999-07-27T23:59:59.000Z

334

Advanced motor driven clamped borehole seismic receiver  

DOE Patents [OSTI]

A borehole seismic tool is described including a borehole clamp which only moves perpendicular to the borehole. The clamp is driven by an electric motor, via a right angle drive. When used as a seismic receiver, the tool has a three part housing, two of which are hermetically sealed. Accelerometers or geophones are mounted in one hermetically sealed part, the electric motor in the other hermetically sealed part, and the clamp and right angle drive in the third part. Preferably the tool includes cable connectors at both ends. Optionally a shear plate can be added to the clamp to extend the range of the tool.

Engler, B.P.; Sleefe, G.E.; Striker, R.P.

1993-02-23T23:59:59.000Z

335

Stabilized radio frequency quadrupole  

DOE Patents [OSTI]

Disclosed is a long-vane stabilized radio frequency resonator for accelerating charged particles and including means defining a radio frequency resonator cavity, a plurality of long vanes mounted in the defining means for dividing the cavity into sections, and means interconnecting opposing ones of the plurality of vanes for stabilizing the resonator. 5 figs.

Lancaster, H.D.; Fugitt, J.A.; Howard, D.R.

1984-12-25T23:59:59.000Z

336

Standard Frequency Broadcasts  

Science Journals Connector (OSTI)

... Mc./sec., at least three of which are available at any time; standard audio frequencies of 440 and 4,000 c./sec. broadcast on these carriers; and ... second of every minute the pulse is omitted. The 1-min. interval in the audio-frequency transmission is used to give the station announcement, either in Morse or (at ...

1944-09-02T23:59:59.000Z

337

Variable path length spectrophotometric probe  

DOE Patents [OSTI]

A compact, variable pathlength, fiber optic probe for spectrophotometric measurements of fluids in situ. The probe comprises a probe body with a shaft having a polished end penetrating one side of the probe, a pair of optic fibers, parallel and coterminous, entering the probe opposite the reflecting shaft, and a collimating lens to direct light from one of the fibers to the reflecting surface of the shaft and to direct the reflected light to the second optic fiber. The probe body has an inlet and an outlet port to allow the liquid to enter the probe body and pass between the lens and the reflecting surface of the shaft. A linear stepper motor is connected to the shaft to cause the shaft to advance toward or away from the lens in increments so that absorption measurements can be made at each of the incremental steps. The shaft is sealed to the probe body by a bellows seal to allow freedom of movement of the shaft and yet avoid leakage from the interior of the probe.

O'Rourke, Patrick E. (157 Greenwood Dr., Martiney, GA 30907); McCarty, Jerry E. (104 Recreation Dr., Aiken, SC 29803); Haggard, Ricky A. (1144 Thornwood Drive, North Augusta, SC 29891)

1992-01-01T23:59:59.000Z

338

Minimum Efficiency Standards for Electric Motors | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Minimum Efficiency Standards for Electric Motors Minimum Efficiency Standards for Electric Motors Minimum Efficiency Standards for Electric Motors October 7, 2013 - 11:28am Addthis Section 313 of the Energy Independence and Security Act (EISA) of 2007 raised Federal minimum efficiency standards for general-purpose, single-speed, polyphase induction motors of 1 to 500 horsepower (hp). This new standard took effect in December 2010. The new minimum efficiency levels match FEMP's performance requirement for these motors. As a result of this increase in mandatory minimum standards and combined with the lack of significant availability of motors exceeding these standards, FEMP is suspending the purchasing specification for electric motors. Federal buyers may select for purchase any motor that meets design requirements.

339

MOTORIZED WINTER RECREATION IMPACTS ON SNOWPACK PROPERTIES Submitted by  

E-Print Network [OSTI]

THESIS MOTORIZED WINTER RECREATION IMPACTS ON SNOWPACK PROPERTIES Submitted by Jared Tucker Heath 2011 All Rights Reserved #12;ii ABSTRACT MOTORIZED WINTER RECREATION IMPACTS ON SNOWPACK PROPERTIES Winter recreation, consisting of snowshoeing, skiing, snowboarding, and snowmobiling, has been increasing

MacDonald, Lee

340

9.373 Somatosensory and Motor Systems, Spring 2002  

E-Print Network [OSTI]

General principles of motor control in biological systems. Structure and function of sensory receptors. Muscle structure and reflex arcs. Spinal cord. Locomotion. Oculomotor control. Cerebellar structure and function. Motor ...

Bizzi, Emilio

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Actions to promote energy-efficient electric motor repair  

Science Journals Connector (OSTI)

Electric motors are repaired 2-3 times over their lifetime. Poor repair practices, particularly widespread in developing countries, can lead to a significant increase in motor losses. It is estimated that worldwide poor repair leads to annual electricity losses of approximately 40 TWh, representing 20 Mtons of CO2 emissions. The main objective of this paper is to provide a technical basis for designing demand side management actions, which address the motor repair market. This paper brings into focus motor repair process trends, energy-efficient motors, typical repair process, actions to promote energy-efficient motor repair, energy-efficient motor rebate schemes to replace old, badly damaged motors and the factors influencing payback. This paper will be useful to energy policy makers, and Demand Side Management (DSM) staff in energy agencies and electric utilities.

Aníbal T. de Almeida; Fernando J.T.E. Ferreira

2003-01-01T23:59:59.000Z

342

An All-Electric Single-Molecule Motor  

Science Journals Connector (OSTI)

An All-Electric Single-Molecule Motor ... Many types of molecular motors have been proposed and synthesized in recent years, displaying different kinds of motion, and fueled by different driving forces such as light, heat, or chemical reactions. ...

Johannes S. Seldenthuis; Ferry Prins; Joseph M. Thijssen; Herre S. J. van der Zant

2010-10-11T23:59:59.000Z

343

When to Purchase Premium Efficiency Motors | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Guide - A Handbook for Industry Optimizing Your Motor-Driven System The Impacts of the Energy Policy Act of 1992 on Industrial End Users of Electric Motor-Driven Systems...

344

Low-cost motor drive embedded fault diagnosis systems  

E-Print Network [OSTI]

Electric motors are used widely in industrial manufacturing plants. Bearing faults, insulation faults, and rotor faults are the major causes of electric motor failures. Based on the line current analysis, this dissertation mainly deals with the low...

Akin, Bilal

2009-05-15T23:59:59.000Z

345

Case Studies of High Efficiency Electric Motor Applicability  

E-Print Network [OSTI]

Much has been written about the advantages and disadvantages of high efficiency electric motors. For a given motor application it is possible to find literature that enables a plant engineer to make an informed choice between a standard efficiency...

Wagner, J. R.

346

Ultra-Efficient and Power-Dense Electric Motors | Department...  

Energy Savers [EERE]

Ultra-Efficient and Power-Dense Electric Motors Ultra-Efficient and Power-Dense Electric Motors electricmotors.pdf More Documents & Publications Advance Patent Waiver W(A)2009-030...

347

Motor Using High Temperature Superconductor as a Rotor  

Science Journals Connector (OSTI)

It is found that a high temperature superconductor rotates in the rotating magnetic field at ... authors and a small motor is made using high temperature superconductor as a rotor. This motor rotates at...

Makoto Takenaka; Masaharu Minami; Kazuo Morimoto

1994-01-01T23:59:59.000Z

348

The basic mechanism of ATP powered motor proteins  

Science Journals Connector (OSTI)

The ability of ATP powered motor proteins to convert chemical free energy into ... for a myosin head to act as a motor protein, it is necessary for it to ... these impacts can be generated when a single water mol...

D. H. Weinstein

349

EIA-878 Motor Gasoline Price Survey ? Reference Guide  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

8 Motor Gasoline Price Survey - Reference Guide For the purposes of the Motor Gasoline Price Survey (EIA-878), we collect prices for the following gasoline grades as defined by...

350

Learning About Wind Turbine Technology, Motors and Generators...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of different variations of motors and generators. Motors are used to convert electric energy from the grid into mechanical energy and can be found in dozens of products in every...

351

EERE-2010-BT-STD-0027 Ex Parte Letter NEMA Motor Training re...  

Broader source: Energy.gov (indexed) [DOE]

0-BT-STD-0027 Ex Parte Letter NEMA Motor Training re DOE Motors Rule 15 July 2013. EERE-2010-BT-STD-0027 Ex Parte Letter NEMA Motor Training re DOE Motors Rule 15 July 2013. This...

352

Continuous Energy Improvement in Motor Driven Systems Ė A Guidebook for Industry  

Broader source: Energy.gov [DOE]

This guidebook provides a step-by-step approach to developing a motor system energy-improvement action plan. It complements DOE's MotorMaster+ motor selection and motor management software tool.

353

Extended cage adjustable speed electric motors and drive packages  

DOE Patents [OSTI]

The rotor cage of a motor is extended, a second stator is coupled to this extended rotor cage, and the windings have the same number of poles. The motor torque and speed can be controlled by either injecting energy into or extracting energy out from the rotor cage. The motor produces less harmonics than existing doubly-fed motors. Consequently, a new type of low cost, high efficiency drive is produced. 12 figs.

Hsu, J.S.

1999-03-23T23:59:59.000Z

354

Entwicklung eines Regel- und Abgasnachbehandlungssystems fŁr einen GDI-Motor  

Science Journals Connector (OSTI)

Im Rahmen eines Entwicklungsprojekts zur Minimierung der Emissionswerte eines Pkw mit GDI-Motor hat Ricardo Consulting Engineers auf dem...

Tim H. Lake; Rob G. Bending; Graham P. WilliamsÖ

1999-12-01T23:59:59.000Z

355

Price of Motor Gasoline Through Retail Outlets  

Gasoline and Diesel Fuel Update (EIA)

Prices, Sales Volumes & Stocks by State Prices, Sales Volumes & Stocks by State (Dollars per Gallon Excluding Taxes) Data Series: Retail Price - Motor Gasoline Retail Price - Regular Gasoline Retail Price - Midgrade Gasoline Retail Price - Premium Gasoline Retail Price - Aviation Gasoline Retail Price - Kerosene-Type Jet Fuel Retail Price - Propane Retail Price - Kerosene Retail Price - No. 1 Distillate Retail Price - No. 2 Distillate Retail Price - No. 2 Fuel Oil Retail Price - No. 2 Diesel Fuel Retail Price - No. 4 Fuel Oil Prime Supplier Sales - Motor Gasoline Prime Supplier Sales - Regular Gasoline Prime Supplier Sales - Midgrade Gasoline Prime Supplier Sales - Premium Gasoline Prime Supplier Sales - Aviation Gasoline Prime Supplier Sales - Kerosene-Type Jet Fuel Prime Supplier Sales - Propane (Consumer Grade) Prime Supplier Sales - Kerosene Prime Supplier Sales - No. 1 Distillate Prime Supplier Sales - No. 2 Distillate Prime Supplier Sales - No. 2 Fuel Oil Prime Supplier Sales - No. 2 Diesel Fuel Prime Supplier Sales - No. 4 Fuel Oil Prime Supplier Sales - Residual Fuel Oil Stocks - Finished Motor Gasoline Stocks - Reformulated Gasoline Stocks - Conventional Gasoline Stocks - Motor Gasoline Blending Components Stocks - Kerosene Stocks - Distillate Fuel Oil Stocks - Distillate F.O., 15 ppm and under Sulfur Stocks - Distillate F.O., Greater than 15 to 500 ppm Sulfur Stocks - Distillate F.O., Greater 500 ppm Sulfur Stocks - Residual Fuel Oil Stocks - Propane/Propylene Period: Monthly Annual

356

The Head-Neck Sensory Motor System  

E-Print Network [OSTI]

The Head-Neck Sensory Motor System Edited by Alain Berthoz Laboratoire de Physiologie, sideslip, and thrust) determine its loca- tion in space, and rotations (yaw, pitch, and roll) change its, no functional significance can be attributed to this multiple sampling. Oculomotor System of Calliphora

357

Theories of rotary motors Richard M. Berry  

E-Print Network [OSTI]

and the `proton turbine' model of La¬ę uger or Berry. Models such as these are typically represented by a small connected to an extracellular helical propeller. The motor is powered by the ¬£ow of ions down to the helical propeller, or `¬Ęlament'. The stator is a ring of particles in the cytoplasmic membrane, containing

Berry, Richard

358

January 08 1 Ford -Chrysler -General Motors  

E-Print Network [OSTI]

January 08 1 Ford - Chrysler - General Motors DOE Fuel Cell Pre-Solicitation Workshop worthy - and not worthy - of study in the DOE Fuel Cell Subprogram · Categories described within DOE Fuel for Study · PGM cathode catalysts, mass activity > 0.44 A/mgPGM ­ Core/shell ­ Structure-controlled PGM

359

Performance improvement of permanent magnet ac motors  

E-Print Network [OSTI]

in selecting the switching states and finer adjustment of flux and torque. A sensorless direct torque control of five-phase permanent magnet motor is implemented. Speed information is obtained based on the position of stator flux linkages and load angle...

Parsa, Leila

2005-08-29T23:59:59.000Z

360

An analysis of induction motor testing techniques  

SciTech Connect (OSTI)

There are two main failure mechanisms in induction motors: bearing related and stator related. The Electric Power Research Institute (EPRI) conducted a study which was completed in 1985, and found that near 37% of all failures were attributed to stator problems. Another data source for motor failures is the Nuclear Plant Reliability Data System (NPRDS). This database reveals that approximately 55% of all motors were identified as being degraded before failure occurred. Of these, approximately 35% were due to electrical faults. These are the faults which this paper will attempt to identify through testing techniques. This paper is a discussion of the current techniques used to predict incipient failure of induction motors. In the past, the main tests were those to assess the integrity of the ground insulation. However, most insulation failures are believed to involve turn or strand insulation, which makes traditional tests alone inadequate for condition assessment. Furthermore, these tests have several limitations which need consideration when interpreting the results. This paper will concentrate on predictive maintenance techniques which detect electrical problems. It will present appropriate methods and tests, and discuss the strengths and weaknesses of each.

Soergel, S. [Entergy Operations Inc., Killona, LA (United States)

1996-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Chemistry and the Motor Car Industry  

Science Journals Connector (OSTI)

Chemistry and the Motor Car Industry ... It so happens that this chemical reaction, the production of water and carbon dioxide (which in proper combination gives you seltzer water), is accompanied by the generation of heat which is used to produce power, and after all, power is what primarily concerns the automotive industry. ...

CHARLES F. KETTERING

1943-06-10T23:59:59.000Z

362

Lithographically Patterned Channels Spatially Segregate Kinesin Motor  

E-Print Network [OSTI]

* Departments of Bioengineering and Electrical Engineering and Materials Research Institute, The Pennsyl and transporting material at nanoscale dimensions, there is considerable interest in harnessing motor proteins), cumulative forces on the order of nN per ¬Ķm2 are theoretically possible. The size, efficiency, and potential

Hancock, William O.

363

Physical context management for a motor vehicle  

DOE Patents [OSTI]

Computer software for and a method of enhancing safety for an operator of a motor vehicle comprising employing a plurality of sensors of vehicle and operator conditions, matching collective output from the sensors against a plurality of known dangerous conditions, and preventing certain activity of the operator if a known dangerous condition is detected.

Dixon, Kevin R. (Albuquerque, NM); Forsythe, James C. (Sandia Park, NM); Lippitt, Carl E. (Albuquerque, NM); Lippitt, legal representative, Lois Diane (Albuquerque, NM)

2009-10-27T23:59:59.000Z

364

Microtubule Motors in Microfluidics Maruti Uppalapati,  

E-Print Network [OSTI]

CHAPTER 1 3 Microtubule Motors in Microfluidics Maruti Uppalapati, 1 Ying-Ming Huang, 2 Shankar division. Because emerging microfluidic devices uti- lize channel geometries similar to cellular scales in incorporating biomotor-driven transport into microfluidic devices. Kinesin-driven transport has the advantage

Hancock, William O.

365

Designing Alternatives to State Motor Fuel Taxes  

E-Print Network [OSTI]

Designing Alternatives to State Motor Fuel Taxes All states rely on gasoline taxes as one source efficiency and alternative fuel vehicles reduce both the equity of the revenue source and its growth over, leading to higher fuel efficiency, wide variations in fuel efficiency, and alternative- fuel vehicles

Bertini, Robert L.

366

Gas Mileage of 1993 Vehicles by J.K. Motors  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3 J.K. Motors Vehicles 3 J.K. Motors Vehicles EPA MPG MODEL City Comb Hwy 1993 J.K. Motors 190E 2.3 MERC BENZ 4 cyl, 2.0 L, Automatic 4-spd, Regular Gasoline Compare 1993 J.K. Motors 190E 2.3 MERC BENZ 16 City 17 Combined 18 Highway 1993 J.K. Motors 230E MERC BENZ 4 cyl, 2.0 L, Automatic 4-spd, Regular Gasoline Compare 1993 J.K. Motors 230E MERC BENZ 16 City 17 Combined 18 Highway 1993 J.K. Motors 300SL 6 cyl, 3.0 L, Automatic 4-spd, Regular Gasoline Compare 1993 J.K. Motors 300SL 14 City 15 Combined 16 Highway 1993 J.K. Motors BMW535I 6 cyl, 3.4 L, Automatic 4-spd, Regular Gasoline Compare 1993 J.K. Motors BMW535I 12 City 14 Combined 18 Highway 1993 J.K. Motors BMW635CSI 6 cyl, 3.4 L, Automatic 4-spd, Regular Gasoline Compare 1993 J.K. Motors BMW635CSI 12 City 14 Combined 18

367

Bifurcation and control of chaos in Induction motor drives  

E-Print Network [OSTI]

The induction motor controlled by Indirect Field Oriented Control (IFOC) is known to have high performance and better stability. This paper reports the dynamical behavior of an indirect field oriented control (IFOC) induction motor drive in the light of bifurcation theory. The speed of high performance induction motor drive is controlled by IFOC method. The knowledge of qualitative change of the behavior of the motor such as equilibrium points, limit cycles and chaos with the change of motor parameters and load torque are essential for proper control of the motor. This paper provides a numerical approach to understand better the dynamical behavior of an indirect field oriented control of a current-fed induction motor. The focus is on bifurcation analysis of the IFOC motor, with a particular emphasis on the change that affects the dynamics and stability under small variations of Proportional Integral controller (PI) parameters, load torque and k, the ratio of the rotor time constant and its estimate etc. Bifurcation diagrams are computed. This paper also attempts to discuss various types of the transition to chaos in the induction motor. The results of the obtained bifurcation simulations give useful guidelines for adjusting both motor model and PI controller parameters. It is also important to ensure desired operation of the motor when the motor shows chaotic behavior. Infinite numbers of unstable periodic orbits are embedded in a chaotic attractor. Any unstable periodic orbit can be stabilized by proper control algorithm. The delayed feedback control method to control chaos has been implemented in this system.

Krishnendu Chakrabarty; Urmila Kar

2014-10-24T23:59:59.000Z

368

Computational Design of a Light-Driven Molecular Motor  

Science Journals Connector (OSTI)

Light-driven molecular motors may be useful for nanotechnology applications. ... The candidate motor molecule was designed using semiempirical quantum chemical methods. ... Full geometry optimization would help to better evaluate the ability of this molecule to serve as a motor and is left to future work. ...

Nicolae M. Albu; Edward Bergin; David J. Yaron

2009-06-02T23:59:59.000Z

369

Ion selectivity of the Vibrio alginolyticus flagellar motor.  

Science Journals Connector (OSTI)

...Vibrio alginolyticus flagellar motor. J Z Liu M Dapice S Khan Department...ion transfers limit unloaded motor speed in this bacterium and...to flagellar rotation. The motor is composed of several independent...obtained after the profile of the electric field has been crossed by the...

J Z Liu; M Dapice; S Khan

1990-09-01T23:59:59.000Z

370

An Improved Sensorless DTC Scheme for EV Induction Motors  

E-Print Network [OSTI]

to increase the efficiency of a Direct Torque Control (DTC) of an induction motor propelling an Electric is a good candidate for EVs propulsion. Index Terms--Electric vehicle, Induction motor, sensorless drive; however, they have not yet used the most remarkable advantages of electric motors. Indeed, an electric

Paris-Sud XI, Université de

371

Lagrangean Decomposition Algorithm for Supply Chain Redesign of Electric Motors  

E-Print Network [OSTI]

Lagrangean Decomposition Algorithm for Supply Chain Redesign of Electric Motors Industry Yongheng Redesign of Electric Motors Industry Introduction of the Supply Chain Model 3/22/13 2 Analia Rodriguez #12 Decomposition Algorithm for Supply Chain Redesign of Electric Motors Industry #12;Lagrangean Decomposition

Grossmann, Ignacio E.

372

Early Imaging Correlates of Subsequent Motor Recovery after Stroke  

E-Print Network [OSTI]

Early Imaging Correlates of Subsequent Motor Recovery after Stroke Randolph S. Marshall, MS, MD days after stroke correlates with subsequent motor recovery. Methods: Twenty-three patients with hemiparesis after first-time stroke were scanned at 2.0 0.9 days while performing a simple motor task. We

373

Stator Vibration Analysis of Bearingless Switched Reluctance Motors  

Science Journals Connector (OSTI)

Radial magnetic force acts on the motor stator cause large vibration and acoustic noise, that have limit the application of switched reluctance motors (SRMs). They can be aggravated when there is unbalanced force due to rotor eccentricity. This paper ... Keywords: switched reluctance motors, bearingless technique, vibration, magnetic fore, mathematic model

Yang Yan; Deng Zhiquan; Zhang Qianying; Wang Xiaolin

2010-06-01T23:59:59.000Z

374

Four Phase Switched Reluctance Motor Direct Torque Control  

Science Journals Connector (OSTI)

The three-phase switched reluctance motor direct torque control method mostly is a simple transplantation of the three-phase AC asynchronous motor direct torque control method, not suitable for arbitrary-phase switched reluctance motor. In this paper, ... Keywords: SRM, Direct torque control, Flux vector, Voltage vector, Switched rule

Wang Mianhua

2011-01-01T23:59:59.000Z

375

Reducing current reversal time in electric motor control  

DOE Patents [OSTI]

The time required to reverse current flow in an electric motor is reduced by exploiting inductive current that persists in the motor when power is temporarily removed. Energy associated with this inductive current is used to initiate reverse current flow in the motor.

Bredemann, Michael V

2014-11-04T23:59:59.000Z

376

Research on Induction Motor for Mini Electric Vehicles  

Science Journals Connector (OSTI)

The motor of a mini electric vehicle uses dozens of storage batteries as power supply, which has low voltage and large current. Therefore, the loss and temperature raise of the motor is high. In this paper, the loss of different induction motors for mini electric vehicles is calculated and the effects of rotor materials and air gap length on the performance of these motors are studied. The analyses show that the efficiency of the motor with a copper mouse cage rotor is considerably higher than that of the motor with a aluminum rotor. The temperature raise of both an air-cooling and a water-cooling induction motor is analyzed, which demonstrates that the temperature raise of the motor windings is higher than that of the other parts, and the temperature raise of the water-cooling motor is lower than that of the air-cooling motor. To verify the results of the theoretical analyses, four prototype induction motors (aluminum rotor, copper mouse cage rotor, air-cooling and spiral groove machine) have been designed and processed. The experiments to measure the efficiency and temperature raise were carried out on these motors. The experimental results prove that the theoretical analyses are correct.

Shukang Cheng; Cuiping Li; feng Chai; Hailong Gong

2012-01-01T23:59:59.000Z

377

VIRTUAL E-MOTOR AS A TOOL FOR THE DEVELOPMENT  

E-Print Network [OSTI]

of such a "virtual motor" is crucial for the success of such an implementation. DEVELOPMENT InvErTEr 42 #12;NEW-motor emulator from SET Power Sys- tems. The emulator permits tests to be run with the drive inverter at full the inverter. The high dynamic response of electric motors can be put to use for the compensation of powertrain

Paderborn, Universität

378

Efficient Motor System Tools Sponsored by the DOE Motor Challenge Program  

E-Print Network [OSTI]

) with joint Bonneville Power Administration (BPA) and Department of Energy (DOE) funding support. Copies are distributed, along with the "Energy-Efficient Electric Motor Selection Handbook" and Electric Ideas Clearinghouse Technology Updates as part...) with joint Bonneville Power Administration (BPA) and Department of Energy (DOE) funding support. Copies are distributed, along with the "Energy-Efficient Electric Motor Selection Handbook" and Electric Ideas Clearinghouse Technology Updates as part...

Blazewicz, S.; McCoy, G. A.; Olszewski, M.; Scheihing, P.

379

Output feedback control for robust tracking of position trajectories for DC electric motors  

Science Journals Connector (OSTI)

Abstract A generalized PI-like output feedback dynamic control scheme with additional integral compensation of the output error is proposed for robust tracking tasks of position reference trajectories for direct current electric motors with speed reduction gear head, using measurements of angular displacement only. The integral compensation is used to improve the robustness property of the controller, in regards to parametric uncertainty and variable load torque, and avoid the application of asymptotic estimation methods of the state vector. A family of Taylor polynomials approximates the perturbation signals, in order to reduce the control design complexity. These signals are compensated by the integral control action directly. Experimental and simulation results describe the effective performance of the control scheme proposed in this paper as an alternative solution to the efficient angular position control problem of direct current electric motors.

Francisco Beltran-Carbajal; Antonio Favela-Contreras; Antonio Valderrabano-Gonzalez; Julio Cesar Rosas-Caro

2014-01-01T23:59:59.000Z

380

Graphene Frequency Multipliers  

E-Print Network [OSTI]

In this letter, the ambipolar transport properties of graphene flakes have been used to fabricate full-wave signal rectifiers and frequency-doubling devices. By correctly biasing an ambipolar graphene field-effect transistor ...

Wang, Han

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Mechanically tunable plasma frequency  

E-Print Network [OSTI]

in S12 phases. function [eps, x] = FindPerm(Thru, Sample,It returns the permittivity (eps) and a frequency matrix %0; % Initialize results matrix eps = zeros(n,1); for i = 1:n

Schuil, Crystal Joy

2009-01-01T23:59:59.000Z

382

IEEE POWER ELECTRONICS LETTERS 1 A Constant-Frequency Method for Improving  

E-Print Network [OSTI]

these are resonant gate drive [3]­[5], pulse frequency modulation (PFM) [6], and a hybrid Manuscript received, in the case of the variable-frequency methods, their potential for generating undesired noise at subharmonicsIEEE POWER ELECTRONICS LETTERS 1 A Constant-Frequency Method for Improving Light-Load Efficiency

Lee, Thomas H.

383

776 IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 34, NO. 4, JULY/AUGUST 1998 Switched Reluctance Motor Modeling with  

E-Print Network [OSTI]

-line parameter estimation using recursive identification for switched reluctance motors (SRM's) is presented. Index Terms-- Parameter identification, switched reluctance motor modeling, switched reluctance motors. I. INTRODUCTION THE switched reluctance motor (SRM) is a simple, low- cost, and robust motor

Husain, Iqbal

384

Effect of hard-disk drive spindle motor vibration on dynamic microwaviness and flying-height modulation  

Science Journals Connector (OSTI)

In order to achieve higher recording densities up to 1 Terabit per square inch using conventional magnetic recording technologies, the recording slider will need to be physically spaced very close to the rotating disk, possibly via the use of an air-bearing surface. However, as the recording slider is flying at such ultra-low spacing of few nanometers over a high-speed rotating disk, it is experiencing disturbances from various different sources and of a wide frequency range. These disturbances may cause the recording slider to vibrate significantly, a condition known as flying-height modulation (FHM), which may result in data loss and possibly headĖdisk interface failure. A significant source of slider excitation is due to low frequency surface topographical features of the rotating disk, termed dynamic microwaviness. Dynamic microwaviness is a dynamic property of the disk and differs from regular topographical microwaviness, which is a static property. Most research works on dynamic microwaviness and FHM have been focused at the component level, using somewhat idealized conditions, such as high performance air-spindle motors that exhibit very low vibration amplitudes. In this paper, actual hard-disk drive spindle motors are used to investigate the effect of spindle motor vibration on dynamic microwaviness and FHM. It is found that there is a clear connection between spindle motor vibration and dynamic microwaviness that affects FHM.

Sung-Chang Lee; Andreas A. Polycarpou

2005-01-01T23:59:59.000Z

385

List of Motor VFDs Incentives | Open Energy Information  

Open Energy Info (EERE)

Motor VFDs Incentives Motor VFDs Incentives Jump to: navigation, search The following contains the list of 352 Motor VFDs Incentives. CSV (rows 1 - 352) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active AEP (Central and North) - CitySmart Program (Texas) Utility Rebate Program Texas Commercial Industrial Institutional Local Government Schools Boilers Central Air conditioners Chillers Comprehensive Measures/Whole Building Custom/Others pending approval Energy Mgmt. Systems/Building Controls Furnaces Heat pumps Lighting Lighting Controls/Sensors Motor VFDs Motors Roofs Windows Yes AEP (Central, North and SWEPCO) - Commercial Solutions Program (Texas) Utility Rebate Program Texas Commercial Industrial Institutional Local Government Nonprofit Schools State Government

386

United States Industrial Electric Motor Systems Market Opportunities Assessment  

Broader source: Energy.gov [DOE]

The objectives of the Market Assessment were to: Develop a detailed profile of the stock of motor-driven equipment in U.S. industrial facilities; Characterize and estimate the magnitude of opportunities to improve the energy efficiency of industrial motor systems; Develop a profile of motor system purchase and maintenance practices; Develop and implement a procedure to update the detailed motor profile on a regular basis using readily available market information; and, Develop methods to estimate the energy savings and market effects attributable to the Motor Challenge Program.

387

Traffic of cytoskeletal motors with disordered attachment rates  

E-Print Network [OSTI]

Motivated by experimental results on the interplay between molecular motors and tau proteins, we extend lattice-based models of intracellular transport to include a second species of particle which locally influences the motor-filament attachment rate. We consider various exactly solvable limits of a stochastic multi-particle model before focusing on the low-motor-density regime. Here, an approximate treatment based on the random walk behaviour of single motors gives good quantitative agreement with simulation results for the tau-dependence of the motor current. Finally, we discuss the possible physiological implications of our results.

H. Grzeschik; R. J. Harris; L. Santen

2008-06-24T23:59:59.000Z

388

U.S. DOE Motor System Market Assessment  

Broader source: Energy.gov [DOE]

AMO is leading a new Motor System Market Assessment (MSMA) to better understand opportunities for energy efficiency improvement in motors and motor-driven systems, which are essential to a wide array of industrial applications. Machine driven processes such as pumps, fans, compressed air, and materials handling and processing accounted for 68% of electricity use (2,840 TBtu direct use) by U.S. manufacturing in 2010. The new assessment will document the efficiency opportunities for motors and motor driven systems and propel market uptake of best practices and technologies designed to address these opportunities.

389

MHK Technologies/MotorWave | Open Energy Information  

Open Energy Info (EERE)

MotorWave MotorWave < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage MotorWave.jpg Technology Profile Primary Organization Motor Wave Group Technology Resource Click here Wave Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description The MotorWave device is composed of about 70 float modules with each float measuring about 4 m3 Each MotorWave is designed to pump water ashore for onshore applications or energy production Technology Dimensions Device Testing Date Submitted 45:49.5 << Return to the MHK database homepage Retrieved from "http://en.openei.org/w/index.php?title=MHK_Technologies/MotorWave&oldid=681609

390

Vehicle Technologies Office: Fact #601: December 14, 2009 World Motor  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1: December 14, 1: December 14, 2009 World Motor Vehicle Production to someone by E-mail Share Vehicle Technologies Office: Fact #601: December 14, 2009 World Motor Vehicle Production on Facebook Tweet about Vehicle Technologies Office: Fact #601: December 14, 2009 World Motor Vehicle Production on Twitter Bookmark Vehicle Technologies Office: Fact #601: December 14, 2009 World Motor Vehicle Production on Google Bookmark Vehicle Technologies Office: Fact #601: December 14, 2009 World Motor Vehicle Production on Delicious Rank Vehicle Technologies Office: Fact #601: December 14, 2009 World Motor Vehicle Production on Digg Find More places to share Vehicle Technologies Office: Fact #601: December 14, 2009 World Motor Vehicle Production on AddThis.com... Fact #601: December 14, 2009

391

Demand, Supply, and Price Outlook for Reformulated Motor Gasoline 1995  

Gasoline and Diesel Fuel Update (EIA)

Demand, Supply, and Price Outlook for Reformulated Demand, Supply, and Price Outlook for Reformulated Motor Gasoline 1995 by Tancred Lidderdale* Provisions of the Clean Air Act Amendments of 1990 designed to reduce ground-level ozone will increase the demand for reformulated motor gaso- line in a number of U.S. metropolitan areas. Refor- mulated motor gasoline is expected to constitute about one-third of total motor gasoline demand in 1995, and refiners will have to change plant opera- tions and modify equipment in order to meet the higher demand. The costs incurred are expected to create a wholesale price premium for reformu- lated motor gasoline of up to 4.0 cents per gallon over the price of conventional motor gasoline. This article discusses the effects of the new regulations on the motor gasoline market and the refining

392

New disc type switched reluctance motor for high torque density  

Science Journals Connector (OSTI)

A new disc type switched reluctance motor (DSRM) structure for high torque density is presented. The new motor has a double sided stator structure that provides higher torque and less acoustic noise than classical switched reluctance motors (SRMs) of small sizes. The motor is based on linear switched reluctance motors. The results of the analytical and numerical analysis are given to evaluate the effectiveness of the motor structure, and experimental noise measurement data are presented. In the numerical analysis, due to the highly nonlinear nature of the motor, finite element analysis is employed. A prototype 6/4 DSRM and a classical SRM are built and tested for experimental studies. The obtained test and simulation results show that the DSRM has a higher torque and less acoustic noise performance.

Ferhat Daldaban; Nurettin Ustkoyuncu

2007-01-01T23:59:59.000Z

393

Vibration modes and acoustic noise in a 4-phase switched reluctance motor  

SciTech Connect (OSTI)

Acoustic noise in the switched reluctance motor is caused primarily by the deformation of the stator lamination stack. Acoustic noise is most severe when the periodic excitation of the SRM phases excites a natural vibration mode of the stack. The natural vibration modes and frequencies of a 4-phase, 8/6 switched reluctance motor are examined. Structural finite element analysis is used to compute the natural modes and frequencies. Impulse tests on the stator stack verify the calculations and show which modes are excited. Heuristic arguments are developed to predict the operating conditions that will excite the natural modes. Measurement of vibration while the machine is under load shows which operating conditions excite the natural modes and verifies the predictions. An approximate formula is derived to predict the frequency of the fundamental vibration mode in terms of lamination dimensions and material properties. The formula is validated by comparison with finite element calculations for several laminations, and hence is shown to be useful in design trade-off studies.

Colby, R.S. [United Technologies Research Center, East Hartford, CT (United States); Mottier, F. [Mottier (Francois), West Hartford, CT (United States); Miller, T.J.E. [Univ. of Glasgow (United Kingdom). Dept. of Electronics and Electrical Engineering

1995-12-31T23:59:59.000Z

394

Summer 2003 Motor Gasoline Outlook.doc  

Gasoline and Diesel Fuel Update (EIA)

3 3 1 Short-Term Energy Outlook April 2003 Summer 2003 Motor Gasoline Outlook Summary For the upcoming summer season (April to September 2003), high crude oil costs and other factors are expected to yield average retail motor gasoline prices higher than those of last year. Current crude oil prices reflect a substantial uncertainty premium due to concerns about the current conflict in the Persian Gulf, lingering questions about whether Venezuelan oil production will recover to near pre-strike levels in time for the peak driving season, and the impact of recent disruptions in Nigerian oil output. Moreover, unusually low crude oil and gasoline inventory levels at the outset of the driving season are expected to keep prices high throughout much of the

395

Motor Gasoline Outlook and State MTBE Bans  

Gasoline and Diesel Fuel Update (EIA)

Motor Gasoline Outlook Motor Gasoline Outlook and State MTBE Bans Tancred Lidderdale Contents 1. Summary 2. MTBE Supply and Demand 3. Ethanol Supply 4. Gasoline Supply 5. Gasoline Prices A. Long-Term Equilibrium Price Analysis B. Short-Term Price Volatility 6. Conclusion 7. Appendix A. Estimating MTBE Consumption by State 8. Appendix B. MTBE Imports and Exports 9. Appendix C. Glossary of Terms 10. End Notes 11. References 1. Summary The U.S. is beginning the summer 2003 driving season with lower gasoline inventories and higher prices than last year. Recovery from this tight gasoline market could be made more difficult by impending State bans on the blending of methyl tertiary butyl ether (MTBE) into gasoline that are scheduled to begin later this year. Three impending State bans on MTBE blending could significantly affect gasoline

396

Efficient, High-Torque Electric Vehicle Motor: Advanced Electric Vehicle Motors with Low or No Rare Earth Content  

SciTech Connect (OSTI)

REACT Project: QM Power will develop a new type of electric motor with the potential to efficiently power future generations of EVs without the use of rare-earth-based magnets. Many of todayís EV motors use rare earth magnets to efficiently provide torque to the wheels. QM Powerís motors would contain magnets that use no rare earth minerals, are light and compact, and can deliver more power with greater efficiency and at reduced cost. Key innovations in this project include a new motor design with iron-based magnetic materials, a new motor control technique, and advanced manufacturing techniques that substantially reduce the cost of the motor. The ultimate goal of this project is to create a cost-effective EV motor that offers the rough peak equivalent of 270 horsepower.

None

2012-01-01T23:59:59.000Z

397

Gastrointestinal motor activity following exposure to a high-frequency electric field  

Science Journals Connector (OSTI)

Nachweis, dass die Exposition von mšnnlichen Sprague-Dawley-Ratten im hochfrequenten elektrischen Feld zu Veršnderungen der gastro-intestinalen Motilitšt fŁhrt.

M. F. Tansy; F. M. Kendall; J. Chryzanowski; F. J. Hohenleitner; A. R. Kall

398

Honda Motor Co Ltd | Open Energy Information  

Open Energy Info (EERE)

Honda Motor Co Ltd Honda Motor Co Ltd Jump to: navigation, search Name Honda Motor Co Ltd Place Tokyo, Tokyo, Japan Zip 107-8556 Sector Vehicles Product Leading global car manufacturer which began research into fuel cell technologies in the 1980s, and has tested several generations of technolgy in its FCX vehicles. Coordinates 35.670479¬į, 139.740921¬į Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.670479,"lon":139.740921,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

399

Counterrotating brushless dc permanent magnet motor  

SciTech Connect (OSTI)

An brushless DC permanent magnet motor is provided for driving an autonomous underwater vehicle. In one embodiment, the motor comprises four substantially flat stators disposed in stacked relationship, with pairs of the stators being axially spaced and each of the stators comprising a tape-wound stator coil; and a first and second substantially flat rotors disposed between the spaced pairs of stators. Each of the rotors includes an annular array of permanent magnets embedded therein. A first shaft is connected to the first rotor and a second, concentric shaft is connected to the second rotor, and drive unit causes rotation of the two shafts in opposite directions. The second shaft comprises a hollow tube having a central bore therein in which the first shaft is disposed. Two different sets of bearings support the first and second shAfts. In another embodiment, the motor comprises two ironless stators and pairs and rotors mounted no opposite sides of the stators and driven by counterrotating shafts.

Hawsey, R.A.; Bailey, J.M.

1990-12-31T23:59:59.000Z

400

Counterrotating brushless dc permanent magnet motor  

SciTech Connect (OSTI)

An brushless DC permanent magnet motor is provided for driving an autonomous underwater vehicle. In one embodiment, the motor comprises four substantially flat stators disposed in stacked relationship, with pairs of the stators being axially spaced and each of the stators comprising a tape-wound stator coil; and a first and second substantially flat rotors disposed between the spaced pairs of stators. Each of the rotors includes an annular array of permanent magnets embedded therein. A first shaft is connected to the first rotor and a second, concentric shaft is connected to the second rotor, and drive unit causes rotation of the two shafts in opposite directions. The second shaft comprises a hollow tube having a central bore therein in which the first shaft is disposed. Two different sets of bearings support the first and second shAfts. In another embodiment, the motor comprises two ironless stators and pairs and rotors mounted no opposite sides of the stators and driven by counterrotating shafts.

Hawsey, R.A.; Bailey, J.M.

1990-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Motor gasolines, winter 1979-1980  

SciTech Connect (OSTI)

Analytical data for 1857 samples of motor gasoline, were collected from service stations throughout the country and were analyzed in the laboratories of various refiners, motor manufacturers, and chemical companies. The data were submitted to the Bartlesville Energy Technology Center for study, necessary calculations, and compilation under a cooperative agreement between the Bartlesville Energy Technology Center (BETC) and the American Petroleum Institute (API). The samples represent the products of 48 companies, large and small, which manufacture and supply gasoline. These data are tabulated by groups according to brands (unlabeled) and grades for 17 marketing districts into which the country is divided. A map included in this report shows marketing areas districts and sampling locations. The report also includes charts indicating the trends of selected properties of motor fuels since 1949. Twelve octane distribution percent charts for areas, 1, 2, 3, and 4 for unleaded, regular, and premium grades of gasoline are presented in this report. The antiknock (octane) index ((R+M)/2) averages of gasoline sold in this country were 87.9, 92.1, 89.0, and 93.3 unleaded below 90.0, unleaded 90.0 and above, regular, and premium grades of gasolines, respectively.

Shelton, E.M.

1980-07-01T23:59:59.000Z

402

Motor gasolines, Winter 1980-81  

SciTech Connect (OSTI)

Analytical data for 546 samples of motor gasoline, were collected from service stations throughout the country and were analyzed in the laboratories of various refiners, motor manufacturers, and chemical companies. The data were submitted to the Bartlesville Energy Technology Center for study, necessary calculations, and compilation under a cooperative agreement between the Bartlesville Energy Technology Center (BETC) and the American Petroleum Institute (API). The samples represent the products of 23 companies, large and small, which manufacture and supply gasoline. These data are tabulated by groups according to brands (unlabeled) and grades for 17 marketing districts into which the country is divided. A map included in this report, shows marketing areas, districts and sampling locations. The report also includes charts indicating the trends of selected properties of motor fuels since 1959. Sixteen octane distribution percent charts for areas 1, 2, 3, and 4 for unleaded antiknock index (R+M)/2 below 90.0, unleaded antiknock index (R+M)/2 90.0 and above, leaded antiknock index (R+M)/2 below 93.0, and leaded antiknock index (R+M)/2 93.0 and above grades of gasoline are presented in this report. The antiknock (octane) index (R+M)/2 averages of gasoline sold in this country were 87.6 unleaded below 90.0, 91.4 unleaded 90.0 and above, 89.1 leaded below 93.0, and 93.3 leaded 93.0 and above grades of gasoline.

Shelton, E.M.

1981-07-01T23:59:59.000Z

403

Electric propulsion motor for marine vehicles  

SciTech Connect (OSTI)

An electric propulsion motor for marine vehicles is described comprising: a disk-shaped rotor and two coaxial disk-shaped stators, the rotor being separated from each of the stators in an axial direction by an air gap; the rotor including a plurality of permanent magnets that produce a first magnetic field; each stator comprising an armature winding that is connected to a source of electrical current to produce a second magnetic field, the first and second magnetic fields being capable of interacting to create an electromagnetic torque; means for coupling the rotor to a propeller shaft for transferring the torque from the rotor to the shaft, and means for detecting the angle of the shaft; a current control means for receiving a current control signal and for employing pulse width modulation to control the source of electrical current; the current control means including means for storing compensation information related to torque variations that are a function of shaft angle; the current control means further including means connected and responsive to the shaft angle detecting means for selecting the compensation information as a function of shaft angle and means for combining the compensation information with the current control signal to control the source of electrical current such that the torque variations that are a function of shaft angle are minimized; and wherein the means for coupling the rotor to the propeller shaft includes means within the motor for isolating the shaft from sound produced by the motor.

Dade, T.B.; Leiding, K.W.; Mongeau, P.P.; Piercey, M.S.

1993-07-20T23:59:59.000Z

404

,"U.S. Motor Gasoline Refiner Sales Volumes"  

U.S. Energy Information Administration (EIA) Indexed Site

Refiner Sales Volumes" Refiner Sales Volumes" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description","# Of Series","Frequency","Latest Data for" ,"Data 1","U.S. Motor Gasoline Refiner Sales Volumes",6,"Monthly","9/2013","1/15/1983" ,"Release Date:","12/2/2013" ,"Next Release Date:","1/2/2014" ,"Excel File Name:","pet_cons_refmg_c_nus_epm0_mgalpd_m.xls" ,"Available from Web Page:","http://www.eia.gov/dnav/pet/pet_cons_refmg_c_nus_epm0_mgalpd_m.htm" ,"Source:","Energy Information Administration" ,"For Help, Contact:","infoctr@eia.gov"

405

Best Practice for Energy Efficient Cleanrooms: Variable Speed Pumping  

E-Print Network [OSTI]

the design water flow, a smaller motor would be required toVSD) motor while maintaining desirable water temperatures

Xu, Tengfang

2005-01-01T23:59:59.000Z

406

Modular PM Motor Drives for Automotive Traction Applications  

SciTech Connect (OSTI)

This paper presents modular permanent magnet (PM) motor drives for automotive traction applications. A partially modularized drive system consisting of a single PM motor and multiple inverters is described. The motor has multiple three-phase stator winding sets and each winding set is driven with a separate three-phase inverter module. A truly modularized inverter and motor configuration based on an axial-gap PM motor is then introduced, in which identical PM motor modules are mounted on a common shaft and each motor module is powered by a separate inverter module. The advantages of the modular approach for both inverter and motor include: (1) power rating scalability--one design meets different power requirements by simply stacking an adequate number of modules, thus avoiding redesigning and reducing the development cost, (2) increased fault tolerance, and (3) easy repairing. A prototype was constructed by using two inverters and an axial-gap PM motor with two sets of three-phase stat or windings, and it is used to assist the diesel engine in a hybrid electric vehicle converted from a Chevrolet Suburban. The effect of different pulse-width-modulation strategies for both motoring and regenerative modes on current control is analyzed. Torque and regenerative control algorithms are implemented with a digital signal processor. Analytical and initial testing results are included in the paper.

Su, G.J.

2001-10-29T23:59:59.000Z

407

Transport of organelles by elastically coupled motor proteins  

E-Print Network [OSTI]

Motor-driven intracellular transport is a complex phenomenon where multiple motor proteins attached to a cargo are simultaneously engaged in pulling activity, often leading to tug-of-war and bidirectional motion. However, most mathematical and computational models ignore the details of the motor-cargo interaction. A few papers have studied more realistic models of cargo transport by including elastic motor-cargo coupling, but either restricts the number of motors and/or uses purely phenomenological forms for energy-dependent hopping rates. Here, we study a generic Model In which N motors are elastically coupled to a cargo, which itself is subject to thermal noise in the cytoplasm and an additional external applied force. The motor-hopping rates are chosen to satisfy detailed balance with respect to the energy of stretching. The master equation is converted to a linear Fokker-Planck equation (LFPE), which yields the average positions of the cargo and motors, as well as their fluctuations and correlation functions. We apply this formalism to two specific forms of the hopping rates. Analytical results are obtained for mean cargo velocity, diffusion coefficient and the average force experienced by each motor for arbitrary N, and compared with numerical simulations. The expansion procedure also allows us to quantify load-sharing features among the cargo-bound motors. In general, we observe significant deviations between analytical predictions based on LFPE and the corresponding numerical results, which suggests a prominent role for higher order corrections.

Deepak Bhat; Manoj Gopalakrishnan

2014-12-17T23:59:59.000Z

408

Frequencies for Radio Astronomy  

Science Journals Connector (OSTI)

... must therefore be achieved through the combined action of three international scientific unions, IAU (astronomy), COSPAR (space) and URSI (radio), which jointly delegate members to an ... jointly delegate members to an Inter-Union Commission for the Allocation of Frequencies for Radio Astronomy and Space Science (IUCAF). This Commission discusses the scientific case for protecting various ...

F. G. SMITH

1970-10-31T23:59:59.000Z

409

A 1.6-to-3.2/4.8 GHz Dual-Modulus Injection-Locked Frequency Multiplier in 0.18  

E-Print Network [OSTI]

: hwu@ece.rochester.edu Abstract-- This paper proposes a variable-modulus injection- locked frequency. Variable-modulus frequency multiplier can be a low-cost solution for a multi-band system to switch, as the frequency multiplier needs to drive its load at a certain power level. Undesired har- monics at the output

Wu, Hui

410

EV Everywhere Grand Challenge - Electric Motors and Critical Materials Breakout  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Electric Motors and Critical Electric Motors and Critical Materials Breakout Laura Marlino Oak Ridge National Laboratory Iver Anderson Ames Laboratory Facilitators July 24, 2012 EV Everywhere Grand Challenge Vehicle Technologies Program - Advanced Power Electronics and Electric Motors eere.energy.gov Electric Drive Status and Targets Current Status* PHEV 40** AEV 100** AEV 300+ System Cost $/kW 20 ($1100) 5 ($600) 14 ($1680) 4 ($600) Motor Specific Power kW/kg 1.3 1.9 1.5 2 PE Specific Power kW/kg 10.5 16 12 16.7 System Peak Efficiency % 90 97 91 98 2022 EV Everywhere Targets Extremely Aggressive Targets Especially Challenging for the Electric Motor * 55kW system ** 120kW system + 150 kW system Vehicle Technologies Program - Advanced Power Electronics and Electric Motors eere.energy.gov

411

In situ Measurement of Robot Motor Electrical Constants  

E-Print Network [OSTI]

Motor torque constant is an important parameter in modeling and controlling a robot axis. In practice this parameter can vary considerably from the manufacturer's specification, if available, and this makes it desirable to characterise individual motors. Traditional techniques require that the motor be removed from the robot for testing, or that an elaborate technique involving weights and pulleys be employed. This paper describes a novel method for measuring the torque constant of robot servo motors in situ and is based on the equivalence of motor torque and back EMF constants. It requires a very simple experimental procedure, utilizes existing axis position sensors, and eliminates effects due to static friction and joint cross coupling. A straightforward extension to this approach can provide a measurement of motor armature impedance. Experimental results obtained for a Puma 560 are discussed and compared with other published results. 1 Introduction A large number of existing robot m...

Peter I. Corke

1996-01-01T23:59:59.000Z

412

Renewal processes and fluctuation analysis of molecular motor stepping  

E-Print Network [OSTI]

We model the dynamics of a processive or rotary molecular motor using a renewal processes, in line with the work initiated by Svoboda, Mitra and Block. We apply a functional technique to compute different types of multiple-time correlation functions of the renewal process, which have applications to bead-assay experiments performed both with processive molecular motors, such as myosin V and kinesin, and rotary motors, such as F1-ATPase.

Jaime E. Santos; Thomas Franosch; Andrea Parmeggiani; Erwin Frey

2005-11-13T23:59:59.000Z

413

High frequency reference electrode  

DOE Patents [OSTI]

A high frequency reference electrode for electrochemical experiments comprises a mercury-calomel or silver-silver chloride reference electrode with a layer of platinum around it and a layer of a chemically and electrically resistant material such as TEFLON around the platinum covering all but a small ring or halo' at the tip of the reference electrode, adjacent to the active portion of the reference electrode. The voltage output of the platinum layer, which serves as a redox electrode, and that of the reference electrode are coupled by a capacitor or a set of capacitors and the coupled output transmitted to a standard laboratory potentiostat. The platinum may be applied by thermal decomposition to the surface of the reference electrode. The electrode provides superior high-frequency response over conventional electrodes. 4 figs.

Kronberg, J.W.

1994-05-31T23:59:59.000Z

414

Petroleum Products Table 31. Motor Gasoline Prices by Grade...  

Gasoline and Diesel Fuel Update (EIA)

by Grade, Sales Type, PAD District, and State 56 Energy Information Administration Petroleum Marketing Annual 1996 Table 31. Motor Gasoline Prices by Grade, Sales Type, PAD...

415

Petroleum Products Table 43. Refiner Motor Gasoline Volumes...  

Gasoline and Diesel Fuel Update (EIA)

by Grade, Sales Type, PAD District, and State 262 Energy Information Administration Petroleum Marketing Annual 1996 Table 43. Refiner Motor Gasoline Volumes by Grade, Sales Type,...

416

Petroleum Products Table 43. Refiner Motor Gasoline Volumes...  

Gasoline and Diesel Fuel Update (EIA)

by Grade, Sales Type, PAD District, and State 262 Energy Information Administration Petroleum Marketing Annual 1997 Table 43. Refiner Motor Gasoline Volumes by Grade, Sales Type,...

417

Building Green in Greensburg: Dwane Shank Motors GM Dealership  

Office of Energy Efficiency and Renewable Energy (EERE)

This poster highlights energy efficiency, renewable energy, and sustainable features of the high-performing Shank Motors GM Dealership building in Greensburg, Kansas.

418

Save Energy Now in Your Motor-Driven Systems  

Broader source: Energy.gov [DOE]

This fact sheet describes how manufacturing plants can save energy and money by making energy efficiency improvements to their industrial motor-driven systems.

419

Chapter 21 - Development of Lightweight Sustainable Electric Motors  

Science Journals Connector (OSTI)

Abstract There are two ways to manufacture components and devices, the top-down and bottom-up processes. Each process has its advantages and disadvantages. In our group, the bottom-up process was selected to build up electromagnetic devices using nanoscale materials in a series of steps. The design of a lightweight electric motor is described based on using nanoscale materials. Development of the motor is work in progress and various processes and results are described. There are several potential applications for lightweight sustainable electric motors. One billion electric motors are produced in the world each year.

Brad Ruff; Weifeng Li; Rajiv Venkatasubramanian; David Mast; Anshuman Sowani; Mark Schulz; Timothy J. Harned

2014-01-01T23:59:59.000Z

420

United States Industrial Motor Systems Market Opportunities Assessment...  

Broader source: Energy.gov (indexed) [DOE]

Executive Summary (December 1998) More Documents & Publications United States Industrial Electric Motor Systems Market Opportunities Assessment Pulp and Paper Mills: Profiting...

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

EV Everywhere Grand Challenge - Electric Motors and Critical...  

Broader source: Energy.gov (indexed) [DOE]

Electric Motors and Critical Materials Breakout Laura Marlino Oak Ridge National Laboratory Iver Anderson Ames Laboratory Facilitators July 24, 2012 EV Everywhere Grand Challenge...

422

BPM Motors in Residential Gas Furnaces: What are the Savings?  

E-Print Network [OSTI]

standby power consumption in BPM furnaces is significantlytotal electricity consumption by BPM furnaces. This is notOverall, it appears the BPM motors used in furnaces offer

Lutz, James; Franco, Victor; Lekov, Alex; Wong-Parodi, Gabrielle

2006-01-01T23:59:59.000Z

423

A New Class of Switched Reluctance Motors without Permanent Magnets...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

A New Class of Switched Reluctance Motors without Permanent Magnets A Segmented Drive Inverter Topology with a Small DC Bus Capacitor A Segmented Drive Inverter Topology with a...

424

Integration of Novel Flux Coupling Motor and Current Source Inverter...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Current Source Inverters for HEVs and FCVs Vehicle Technologies Office Merit Review 2014: Wireless Charging Integration of Novel Flux Coupling Motor and Current Source Inverter...

425

Electric motor control system with application to marine propulsion.  

E-Print Network [OSTI]

??This thesis analyses the behavior of an induction motor based on a mathematical model created for its simulation. The model describes the interaction of itsÖ (more)

Roa, Camilo Carlos.

2010-01-01T23:59:59.000Z

426

Direct energy converter controllers for switched reluctance motor operation.  

E-Print Network [OSTI]

??There is increasing demand for simple motor drives offering high reliability and fault tolerance in applications such as the aerospace actuator industry, with the developmentÖ (more)

Goodman, Andrew Simon

2007-01-01T23:59:59.000Z

427

Multi-layer switched reluctance motor to reduce torque ripple  

Science Journals Connector (OSTI)

A new multi-layer switched reluctance motor (MSRM) having a high starting torque capability with reduced torque ripple and acoustic noise is presented. Measured data and the results of numerical analysis are given to evaluate the motor structure. In the numerical analysis, due to the highly nonlinear nature of the motor, finite element analysis (FEA) is employed. A prototype multi-layer SRM is built and tested in the experimental studies. The obtained test and simulation results show that the multi-layer motor structure has a smooth torque profile with high starting torque and less acoustic noise.

Ferhat Daldaban; Nurettin Ustkoyuncu

2008-01-01T23:59:59.000Z

428

Computer aided design of multi-phase switched reluctance motor  

Science Journals Connector (OSTI)

In this paper a comprehensive computer-aided design (CAD) procedure of multiphase switched reluctance motor (SRM) is presented. Better approach for calculation of the outer dimensions phase inductance flux linkage and losses and also a different concept for calculating the average torque of the motor are incorporated in the CAD program. The average torque is calculated based on the most effective 15į (for 8 ? 6 SRM) of the static torque profile of the motor. A sample design of a 5 hp SRM is presented in detail and the design is validated by conducting a two-dimensional finite element analysis of the motor.

N. K. Sheth; K. R. Rajagopal

2005-01-01T23:59:59.000Z

429

Laboratory Appraisal of Slime Formation in Motor Oils  

Science Journals Connector (OSTI)

Water accumulated in motor oils in the process of use exercises ... . Indeed, these products, by reacting with water, form a ďsoft precipitateĒ.

M. A. Boltalina; G. I. Shor; I. G. FuksÖ

2001-07-01T23:59:59.000Z

430

Investigation of induction motors of pumps for water wells  

Science Journals Connector (OSTI)

A digital three-phase model of a submersible induction motor drive for pumps of water wells that is convenient for modeling on...

R. I. Mustafaev; R. A. Saidov

2011-04-01T23:59:59.000Z

431

Design and Control of High Power Density Motor Drive.  

E-Print Network [OSTI]

??This dissertation aims at developing techniques to achieve high power density in motor drives under the performance requirements for transportation system. Four main factors influencingÖ (more)

Jiang, Dong

2011-01-01T23:59:59.000Z

432

Advanced Power Electronics and Electric Motors R&D  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Technologies to the Marketplace Advancing Power Electronics and Electric Motors More Fuel Efficient Vehicles on the Road * Ames Laboratory * Argonne National Laboratory * Oak...

433

Table 44. Refiner Motor Gasoline Volumes by Formulation, Sales...  

Gasoline and Diesel Fuel Update (EIA)

Information AdministrationPetroleum Marketing Annual 1998 Table 44. Refiner Motor Gasoline Volumes by Formulation, Sales Type, PAD District, and State (Thousand Gallons per...

434

Table 35. Refiner Motor Gasoline Prices by Grade, Sales Type...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

Information Administration Petroleum Marketing Annual 1995 Table 35. Refiner Motor Gasoline Prices by Grade, Sales Type, PAD District, and State (Cents per Gallon Excluding...

435

Table 32. Conventional Motor Gasoline Prices by Grade, Sales...  

Gasoline and Diesel Fuel Update (EIA)

Administration Petroleum Marketing Annual 1995 Table 32. Conventional Motor Gasoline Prices by Grade, Sales Type, PAD District, and State (Cents per Gallon Excluding...

436

Table 32. Conventional Motor Gasoline Prices by Grade, Sales...  

Gasoline and Diesel Fuel Update (EIA)

- - - - W W - - - - - - See footnotes at end of table. 32. Conventional Motor Gasoline Prices by Grade, Sales Type, PAD District, and State 86 Energy Information...

437

Table 44. Refiner Motor Gasoline Volumes by Formulation, Sales...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

Information AdministrationPetroleum Marketing Annual 1999 Table 44. Refiner Motor Gasoline Volumes by Formulation, Sales Type, PAD District, and State (Thousand Gallons per...

438

Table 32. Conventional Motor Gasoline Prices by Grade, Sales...  

Gasoline and Diesel Fuel Update (EIA)

AdministrationPetroleum Marketing Annual 1998 Table 32. Conventional Motor Gasoline Prices by Grade, Sales Type, PAD District, and State (Cents per Gallon Excluding...

439

Table 33. Oxygenated Motor Gasoline Prices by Grade, Sales Type...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

Administration Petroleum Marketing Annual 1995 Table 33. Oxygenated Motor Gasoline Prices by Grade, Sales Type, PAD District, and State (Cents per Gallon Excluding...

440

Table 44. Refiner Motor Gasoline Volumes by Formulation, Sales...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

- - - - W W - - - - - - See footnotes at end of table. 44. Refiner Motor Gasoline Volumes by Formulation, Sales Type, PAD District, and State 292 Energy Information...

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Table 33. Oxygenated Motor Gasoline Prices by Grade, Sales Type...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

- - - - - - - - - - - - See footnotes at end of table. 33. Oxygenated Motor Gasoline Prices by Grade, Sales Type, PAD District, and State 116 Energy Information...

442

Table 34. Reformulated Motor Gasoline Prices by Grade, Sales...  

Gasoline and Diesel Fuel Update (EIA)

Administration Petroleum Marketing Annual 1995 Table 34. Reformulated Motor Gasoline Prices by Grade, Sales Type, PAD District, and State (Cents per Gallon Excluding...

443

Table 35. Refiner Motor Gasoline Prices by Grade, Sales Type...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

Information AdministrationPetroleum Marketing Annual 1999 Table 35. Refiner Motor Gasoline Prices by Grade, Sales Type, PAD District, and State (Cents per Gallon Excluding...

444

Table 48. Prime Supplier Sales Volumes of Motor Gasoline by...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

Petroleum Marketing Annual 1999 Table 48. Prime Supplier Sales Volumes of Motor Gasoline by Grade, Formulation, PAD District, and State (Thousand Gallons per Day) - Continued...

445

Table 48. Prime Supplier Sales Volumes of Motor Gasoline by...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

Petroleum Marketing Annual 1995 Table 48. Prime Supplier Sales Volumes of Motor Gasoline by Grade, Formulation, PAD District, and State (Thousand Gallons per Day) - Continued...

446

Table 44. Refiner Motor Gasoline Volumes by Formulation, Sales...  

Gasoline and Diesel Fuel Update (EIA)

Information Administration Petroleum Marketing Annual 1995 Table 44. Refiner Motor Gasoline Volumes by Formulation, Sales Type, PAD District, and State (Thousand Gallons per...

447

Table 43. Refiner Motor Gasoline Volumes by Grade, Sales Type...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

Information AdministrationPetroleum Marketing Annual 1998 Table 43. Refiner Motor Gasoline Volumes by Grade, Sales Type, PAD District, and State (Thousand Gallons per Day) -...

448

Table 35. Refiner Motor Gasoline Prices by Grade, Sales Type...  

Gasoline and Diesel Fuel Update (EIA)

Information AdministrationPetroleum Marketing Annual 1998 Table 35. Refiner Motor Gasoline Prices by Grade, Sales Type, PAD District, and State (Cents per Gallon Excluding...

449

Table 43. Refiner Motor Gasoline Volumes by Grade, Sales Type...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

Information Administration Petroleum Marketing Annual 1995 Table 43. Refiner Motor Gasoline Volumes by Grade, Sales Type, PAD District, and State (Thousand Gallons per Day) -...

450

Table 48. Prime Supplier Sales Volumes of Motor Gasoline by...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

Petroleum Marketing Annual 1998 Table 48. Prime Supplier Sales Volumes of Motor Gasoline by Grade, Formulation, PAD District, and State (Thousand Gallons per Day) - Continued...

451

Table 43. Refiner Motor Gasoline Volumes by Grade, Sales Type...  

Gasoline and Diesel Fuel Update (EIA)

Information AdministrationPetroleum Marketing Annual 1999 Table 43. Refiner Motor Gasoline Volumes by Grade, Sales Type, PAD District, and State (Thousand Gallons per Day) -...

452

Table 32. Conventional Motor Gasoline Prices by Grade, Sales...  

Gasoline and Diesel Fuel Update (EIA)

- - - - 64.7 64.7 - - - - - - See footnotes at end of table. 32. Conventional Motor Gasoline Prices by Grade, Sales Type, PAD District, and State 86 Energy Information...

453

Motor gasolines, winter 1981-1982  

SciTech Connect (OSTI)

Analytical data for 905 samples of motor gasoline, were collected from service stations throughout the country and were analyzed in the laboratories of various refiners, motor manufacturers, and chemical companies. The data were submitted to the Bartlesville Energy Technology Center for study, necessary calculations, and compilation under a cooperative agreement between the Bartlesville Energy Technology Center (BETC) and the American Petroleum Institute (API). The samples represent the products of 30 companies, large and small, which manufacture and supply gasoline. These data are tabulated by groups according to brands (unlabeled) and grades for 17 marketing districts into which the country is divided. A map included in this report, shows marketing areas, districts and sampling locations. The report also includes charts indicating the trends of selected properties of motor fuels since winter 1959-1960 survey for the leaded gasolines, and since winter 1979-1980 survey for the unleaded gasolines. Sixteen octane distribution percent charts for areas 1, 2, 3, and 4 for unleaded antiknock index (R+M)/2 below 90.0, unleaded antiknock index (R+M)/2 90.0 and above, leaded antiknock index (R+M)/2 below 93.0, and leaded antiknock index (R+M)/2 93.0 and above grades of gasoline are presented in this report. The antiknock (octane) index (R+M)/2 averages of gasoline sold in this country were 87.4 for unleaded below 90.0, 91.7 for unleaded 90.0 and above, and 88.9 for leaded below 93.0. Only one sample was reported as 93.0 for leaded gasolines with an antiknock index (R+M)/2 93.0 and above.

Shelton, E M

1982-07-01T23:59:59.000Z

454

Motor gasolines, winter 1982-83  

SciTech Connect (OSTI)

Analytical data for 1330 samples of motor gasoline, were collected from service stations throughout the country and were analyzed in the laboratories of various refiners, motor manufacturers, and chemical companies. The data were submitted to the Bartlesville Energy Technology Center for study, necessary calculations, and compilation under a cooperative agreement between the Bartlesville Energy Technology Center (BETC) and the American Petroleum Institute (API). The samples represent the products of 28 companies, large and small, which manufacture and supply gasoline. These data are tabulated by groups according to brands (unlabeled) and grades for 17 marketing districts into which the country is divided. A map included in this report, shows marketing areas, districts and sampling locations. The report also includes charts indicating the trends of selected properties of motor fuels since winter 1959-1960 survey for the leaded gasolines, and since winter 1979-1980 survey for the unleaded gasolines. Sixteen octane distribution percent charts for areas 1, 2, 3, and 4 for unleaded antiknock index (R + M)/2 below 90.0, unleaded antiknock index (R + M/2 90.0 and above, leaded antiknock index (R + M)/2 below 93.0, and leaded antiknock index (R + M)/2 93.0 and above grades of gasoline are presented in this report. The antiknock (octane) index (R + M)/2 averages of gasoline sold in this country were 87.3 for unleaded below 90.0, 91.5 for unleaded 90.0 and above, and 89.1 for leaded below 93.0, and no data was reported in this report for leaded gasolines with an antiknock index (R + M)/2 93.0 and above. 21 figures, 5 tables.

Shelton, E.M.

1983-07-01T23:59:59.000Z

455

Low cost, compact, and high efficiency traction motor for electric and hybrid electric vehicles  

SciTech Connect (OSTI)

A new motor drive, the switched reluctance motor drive, has been developed for hybrid-electric vehicles. The motor drive has been designed, built and tested in the test bed at a near vehicle scale. It has been shown that the switched reluctance motor drive is more suitable for traction application than any other motor drive.

Ehsani, Mark

2002-10-07T23:59:59.000Z

456

Electric machine for hybrid motor vehicle  

DOE Patents [OSTI]

A power system for a motor vehicle having an internal combustion engine and an electric machine is disclosed. The electric machine has a stator, a permanent magnet rotor, an uncluttered rotor spaced from the permanent magnet rotor, and at least one secondary core assembly. The power system also has a gearing arrangement for coupling the internal combustion engine to wheels on the vehicle thereby providing a means for the electric machine to both power assist and brake in relation to the output of the internal combustion engine.

Hsu, John Sheungchun (Oak Ridge, TN)

2007-09-18T23:59:59.000Z

457

Advanced motor driven clamped borehole seismic receiver  

DOE Patents [OSTI]

A borehole seismic tool including a borehole clamp which only moves perpendicular to the borehole. The clamp is driven by an electric motor, via a right angle drive. When used as a seismic receiver, the tool has a three part housing, two of which are hermetically sealed. Accelerometers or geophones are mounted in one hermetically sealed part, the electric meter in the other hermetically sealed part, and the clamp and right angle drive in the third part. Preferably the tool includes cable connectors at both ends. Optionally a shear plate can be added to the clamp to extend the range of the tool.

Engler, Bruce P. (Sandoval County, NM); Sleefe, Gerard E. (Bernalillo County, NM); Striker, Richard P. (Bernalillo County, NM)

1993-01-01T23:59:59.000Z

458

Self isolating high frequency saturable reactor  

DOE Patents [OSTI]

The present invention discloses a saturable reactor and a method for decoupling the interwinding capacitance from the frequency limitations of the reactor so that the equivalent electrical circuit of the saturable reactor comprises a variable inductor. The saturable reactor comprises a plurality of physically symmetrical magnetic cores with closed loop magnetic paths and a novel method of wiring a control winding and a RF winding. The present invention additionally discloses a matching network and method for matching the impedances of a RF generator to a load. The matching network comprises a matching transformer and a saturable reactor.

Moore, James A. (Powell, TN)

1998-06-23T23:59:59.000Z

459

Optimization of induction motor efficiency: Volume 2, Single-phase induction motors: Final report  

SciTech Connect (OSTI)

The optimal design of the motor dimensions, the capacitance of the run capacitor, the winding distribution and the choice of the electrical steel are the most important sources for an improvement of the efficiency of modern single-phase induction motors for given performance and material cost constraints. The formulation of the techniques which realize this optimization is based on nonlinear programming approaches. The Method of Boundary Search Along Active Constraints is used for the optimal design of the motor dimensions of a commercially available 2 hp, 115 V single-phase induction motor. Based on the optimization results due to the above mentioned four optimization components, the relationships between efficiency, power factor, cost, active materials and the values of the capacitance of the run capacitor are studied and the limited validity of the model law is discussed. This report also explains why the Wanlass retrofit improves efficiency and details the advantages and disadvantages of such a retrofitting as compared with the operation in the standard configuration.

Fuchs, E.F.; Huang, H.; Vandenput, A.J.; Holl, J.; Appelbaum, J.; Zak, Z.; Erlicki, M.S.

1987-05-01T23:59:59.000Z

460

Impacts of Motor Vehicle Operation on Water Quality in the United States - Clean-up Costs and Policies  

E-Print Network [OSTI]

Non-point Source Water Pollution Motor vehicles are a majorpreventing water pollution from motor vehicles would be muchcosts of controlling water pollution from motor vehicles. It

Nixon, Hilary; Saphores, Jean-Daniel

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Not a Babe in the Woods: Using MotorMaster Software to Make Sophisticated Electric Motor Purchase Decisions  

E-Print Network [OSTI]

, with funding from the Bonneville Power Administration and the U.S. Department of Energy. For ordering information caJI the Washington State Energy Office at (206)956-2215, or write MotorMaster, WSEO, P.O. 43165, Olympia, WA 98504-3165. Motor... by the American Council for an Energy Efficient Economy: 1001 Connecticut Ave. NW #535, Washington, DC 20036, (202) 429-8873; $24.95. Energy-Efficient Electric Motor Selection HBonneville Power...

Litman, T.

462

Design of Rotor-side Controller Using Adaptive Time-frequency Method for DFIG Bearing Fault Detection  

Science Journals Connector (OSTI)

To ensure the reliable operation and power quality of wind power systems, the fault-tolerant control for DFIG is studied in this paper. Based on measured motor currents data, an adaptive statistical time-frequency method is then used to detect the fault ... Keywords: Doubly-fed induction generator, monitoring, wind turbine, rotor side inverter

Suratsavadee K. Korkua

2013-07-01T23:59:59.000Z

463

Seasonal Forecasting of Extreme Wind and Precipitation Frequencies in Europe  

E-Print Network [OSTI]

Seasonal Forecasting of Extreme Wind and Precipitation Frequencies in Europe Matthew J. Swann;Abstract Flood and wind damage to property and livelihoods resulting from extreme precipitation events variability of these extreme events can be closely related to the large-scale atmospheric circulation

Feigon, Brooke

464

The frequency dependent impedance of an HVdc converter  

SciTech Connect (OSTI)

A linear and direct method of determining the frequency dependent impedance of a 12 pulse HVdc converter is presented. Terms are developed for both the dc and ac side impedances of the converter, including the effect of the firing angle control system, the commutation period, and the variability of the commutation period. The impedance predictions are verified by dynamic simulation.

Wood, A.R.; Arrillaga, J. [Univ. of Canterbury, Christchurch (New Zealand)] [Univ. of Canterbury, Christchurch (New Zealand)

1995-07-01T23:59:59.000Z

465

MotorWeek: Fuel Economy Focus  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Navigational links Navigational links Site Map | Videos | Links | More Info | Search | Contacts | HOME www.fueleconomy.gov Photograph of Cars Find and Compare Cars | Gas Mileage Tips | Gasoline Prices | Your MPG Will Vary | Why is Fuel Economy Important? | Your MPG | Hybrids, Diesels, Alt Fuels, Etc. | Tax Incentives | Extreme MPG U.S. Department of Energy | Print the Fuel Economy Guide | U.S. Environmental Protection Agency Gas Mileage Tips Driving more efficiently Keeping your car in shape Planning and combining trips Choosing a more efficient vehicle More Info MotorWeek: Text Version Video: MotorWeek test showing impact of driving style on MPG. Fuel Economy Focus John Davis The window sticker on a new car contains lots of information besides just the price. For instance, down at the bottom are the all important government fuel economy estimates. But just like the price on the sticker may have little in common with what you actually pay for the car, the mileage estimates may also be far different from real world results. So, why does gas mileage vary so much? Well, the answers are as varied as your mileage.

466

Design of Brushless DC Motor Control System Based on Back Electric Motive Force (EMF)  

Science Journals Connector (OSTI)

Brushless dc motor uses electronic commutation technology instead of mechanical commutation brush for electric motor with new types of mechanical and electrical integration. It has the ac motor simple structure, ...

Ran Dong; Hongqi Wang; Weiwei Xue

2012-01-01T23:59:59.000Z

467

A Motor-Driven, Mechanically Supported Ultracentrifuge for the Separation of Biological Materials  

Science Journals Connector (OSTI)

...Pennsylvania. | Journal Article A MOTOR-DRIVEN, MECHANICALLY SUPPORTED...present communication describes a motor-driven, mechan- ically supported...the rotor by a unit driven by an electric motor. The driving mechanism is a "lathe...

Arthur J. Rawson; Henry W. Scherp; F. E. Lindquist

1940-11-01T23:59:59.000Z

468

Electric transmission based on the switched reluctance motor with independent excitation  

Science Journals Connector (OSTI)

The prospects and experience of using a switched reluctance motor with independent external excitation for a traction electric motor are discussed. The possibility of regulating the excitation allows the motor to...

V. F. Kozachenko; V. N. Ostrirov; M. M. Lashkevich

2014-02-01T23:59:59.000Z

469

The United States Industrial Electric Motor Systems Market Opportunities Assessment: Key Results  

E-Print Network [OSTI]

portrait of the inventory of motor systems currently in use in US industrial facilities, estimate motor system energy use and potential for energy savings. The research and analysis to support these objectives consisted primarily of on-site motor system...

Rosenberg, M.

470

Achieving A Long Term Business Impact by Improving the Energy Effectiveness and Reliability of Electric Motors  

E-Print Network [OSTI]

capability. The Corporate Motor Technology Team (CMTT) conceived and led a program to optimize the cost effectiveness and reliability of new motors and developed criteria to determine whether to repair or replace motors that fail. The higher energy efficiency...

Whelan, C. D.

471

Modeling the High-Frequency Component of Arctic Sea Ice Drift and Deformation  

Science Journals Connector (OSTI)

Buoy observations of sea ice drift show that sea ice motion and deformation contain substantial high-frequency variability at subdaily timescales. However, numerical simulations of the sea ice dynamics normally do not include processes on such ...

Petra Heil; William D. Hibler III

2002-11-01T23:59:59.000Z

472

Electromagnetic Coupling in a dc Motor and Tachometer Assembly  

E-Print Network [OSTI]

-pole permanent magnet stator devices. A shaft of finite stiffness connects the tachometer and motor armatures machines. The experimental test setup consists of an integrated permanent magnet dc motor-tachometer unit-tachometer shaft or a flexible mechanical coupling, this exercise in servo-control design becomes quite challenging

Awtar, Shorya

473

SUPER HIGH-SPEED MINIATURIZED PERMANENT MAGNET SYNCHRONOUS MOTOR  

E-Print Network [OSTI]

SUPER HIGH-SPEED MINIATURIZED PERMANENT MAGNET SYNCHRONOUS MOTOR by LIPING ZHENG B.S. Shanghai with the design of permanent magnet synchronous motors (PMSM) to operate at super-high speed with high efficiency shaft output power at 200,000 rpm and at the cryogenic temperature of 77 K. The test results showed

Wu, Thomas

474

Electric-Motor Control Gear : Starting, Protection and Speed  

Science Journals Connector (OSTI)

... THIS book is arranged in the form of notes on motors and control gear, and contains a lot of useful information in a small space. ... control gear are discussed briefly, graphical examples being given for squirrel-cage and slip-ring motors. A valuable feature is the inclusion of speed-torque characteristics of various types of ...

A. T. D.

1949-01-01T23:59:59.000Z

475

High Temperature, Buried Permanent Magnet, Brushless DC Motor  

E-Print Network [OSTI]

, power and torque output are predicted from calculations of the nonlinear finite element model of the motor. The motor stator is wound, potted, cured and high potential tested at 1000 degrees F. A servo amplifier from Advanced Motion Control is used...

Zhang, Zhengxin

2010-10-12T23:59:59.000Z

476

A turing-like handshake test for motor intelligence  

Science Journals Connector (OSTI)

In the Turing test, a computer model is deemed to "think intelligently" if it can generate answers that are not distinguishable from those of a human. This test is limited to the linguistic aspects of machine intelligence. A salient function of the brain ... Keywords: diagnostics, discrete, haptics, human machine interface, motor behavior, motor control, perception, rhythmic, teleoperation, turing test

Amir Karniel; Ilana Nisky; Guy Avraham; Bat-Chen Peles; Shelly Levy-Tzedek

2010-07-01T23:59:59.000Z

477

Soft commutated direct current motor [summary of proposed paper  

SciTech Connect (OSTI)

A novel soft commutated direct current (DC) motor is introduced. The current of the commutated coil is intentionally drained before the brush disconnects the coil. This prevents the spark generation that normally occurs in conventional DC motors. A similar principle can be applied for DC generators.

Hsu, John S.

1998-10-22T23:59:59.000Z

478

Fuzzy Estimation of DC Motor Winding Currents Innovatia Software  

E-Print Network [OSTI]

stator windings. an attractive alternative to current estimation using In order to implement an eFuzzy Estimation of DC Motor Winding Currents Dan Simon Innovatia Software 775 Rothrock Circle ¬įux is rotated in the desired direction of ofuzzy ¬Įltering to motor winding current estimation

Simon, Dan

479

BRAINA JOURNAL OF NEUROLOGY The neurophysiological correlates of motor tics  

E-Print Network [OSTI]

BRAINA JOURNAL OF NEUROLOGY The neurophysiological correlates of motor tics following focal disorders. Brief repetitive muscle contractions known as motor tics are a common symptom in several basal to the sensorimotor putamen of behaving primates to induce stereotyped tics similar to those observed in human

Bar-Gad, Izhar

480

Semiconductor Alternating-Current Motor Drives and Energy Conservation  

Science Journals Connector (OSTI)

...required to avoid high heating losses in the motors...important user concerns-price, efficiency, and...been offered at a price thatjustified broad...direct-ly, causes motor heating, mechanical stress...000 barrels of oil equivalent per day...University, New Haven, Connecticut, and is currently...

D. J. BenDaniel; E. E. David Jr.

1979-11-16T23:59:59.000Z

Note: This page contains sample records for the topic "motors variable frequency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Load-Dependent Assembly of the Bacterial Flagellar Motor  

Science Journals Connector (OSTI)

...the motor at lower loads. Rough extrapolation of the data of Fig.-3 to zero...to the coverslip. Data analysis. Motor...calculated using power spectra of combined (x, y) data as described in reference...5-s. Relative loads for different bead...

Murray J. Tipping; Nicolas J. Delalez; Ren Lim; Richard M. Berry; Judith P. Armitage

2013-08-01T23:59:59.000Z

482

EE443L Lab 2: Modeling a DC Motor Introduction  

E-Print Network [OSTI]

and add conversion factors. Copy the LabVIEW VI lab2.vi and its associated subVI Altera the four conversion factors. Motor voltage is measured with a voltage divider to ensure DAQ card analog: The DC motor is a common actuator in control systems that converts electrical energy into rotational

Wedeward, Kevin

483

motor sensory Systems Neuroscience Lecture: Reward and Addiction  

E-Print Network [OSTI]

cognition reward motor sensory Systems Neuroscience Lecture: Reward and Addiction Srdjan D. Antic motor response You are cold, dehydrated, and depleted of energy. The appropriate humoral to correct these disturbances is to actively seek or generate warmth by moving, to find and drink water

Oliver, Douglas L.

484

ChargeTransfer EAM Studies of Kinesin Molecular Motor  

E-Print Network [OSTI]

ChargeTransfer EAM Studies of Kinesin Molecular Motor Protein Mechanochemistry Vijay species. As a first step toward simulating the catalytic core of the molecular motor protein kinesin and dynamical studies of liquid water [5]. This research has the longterm goal of enabling a detailed

Maccabe, Barney

485

MOTOR FUNCTIONS OF THE LARGE INTESTINE IN SHEEP VERSUS CATTLE  

E-Print Network [OSTI]

MOTOR FUNCTIONS OF THE LARGE INTESTINE IN SHEEP VERSUS CATTLE J. FIORAMONTI Marie-Françoise HUBERT. Informa- tion on its motor functions is restricted to recent studies of the motility of the caecum of water absorp- tion in the cow might thus be linked to pecu- liar patterns of motility of the spiral

Paris-Sud XI, Université de

486

Motor transport of self-assembled cargos in crowded environments  

E-Print Network [OSTI]

). Additionally, experimental studies have shown that teams of motors are capable of bypassing static obstacles and experimental bio- physical model systems of intracellular cargo have assumed fixed teams of motors transporting. axonal transport | cytoplasmic dynein Intracellular transport is an essential cellular process used

Ross, Jennifer

487

Motor System Energy Efficiency Supply Curves: A Methodology for Assessing  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Motor System Energy Efficiency Supply Curves: A Methodology for Assessing Motor System Energy Efficiency Supply Curves: A Methodology for Assessing the Energy Efficiency Potential of Industrial Motor Systems Speaker(s): Ali Hasanbeigi Date: February 8, 2011 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Aimee McKane Motor-driven equipment accounts for approximately 60% of manufacturing final electricity use worldwide. A major barrier to effective policymaking, and to more global acceptance of the energy efficiency potential in industrial motor systems, is the lack of a transparent methodology for quantifying the magnitude and cost-effectiveness of these energy savings. This paper presents the results of groundbreaking analyses conducted for five countries and one region to begin to address this barrier. Using a combination of expert opinion and available data from the United States,

488

Frequency Scalable Non-Linear Waveform Generator for Mixed-Simal Power-Factor-Correction IC Controller'  

E-Print Network [OSTI]

operates with a fixed switching frequency fs and variable duty ratio R, and can be analyzed using standard of a switching period, a fixed-frequency clock pulse sets the switch drive high. A signal proportionalFrequency Scalable Non-Linear Waveform Generator for Mixed-Simal Power-Factor-Correction IC

489

The XRCC1 399Gln Polymorphism and the Frequency of p53 Mutations in Taiwanese Oral Squamous Cell Carcinomas  

Science Journals Connector (OSTI)

...association with the frequency of p53 mutation...genetic lesions that drive human carcinogenesis...significantly increased the frequency of p53 mutations...399 genotype and the frequency of p53 gene mutation Variable Gln/Gln Gln/Arg...

Ling-Ling Hsieh; Huei-Tzu Chien; I-How Chen; Chun-Ta Liao; Hung-Ming Wang; Shih-Ming Jung; Pei-Feng Wang; Joseph Tung-Chieh Chang; Min-Chi Chen; and Ann-Joy Cheng

2003-05-01T23:59:59.000Z

490

E-Print Network 3.0 - augment motor training-induced Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Direct-Drive Motors Farhad Aghili, Member, IEEE, Martin Buehler, Member... - ation of permanent-magnet synchronous motors and their control based on Fourier coefficients. A new......

491

Quantum control of a chiral molecular motor driven by linearly polarized laser pulses  

Science Journals Connector (OSTI)

We demonstrate quantum control of a chiral molecular motor driven by linearly polarized ultrashort laser pulses. Electric fields of laser pulses to drive the motor in desired...

Yamaki, Masahiro; Ohtsuki, Yukiyoshi; Kono, Hirohiko; Fujimura, Yuichi; Hoki, Kunihito

492

Premium Efficiency Motor Selection and Application Guide Ė A Handbook for Industry  

Broader source: Energy.gov [DOE]

This handbook informs new motor purchase decisions by identifying energy and cost savings that can come from replacing motors with premium efficiency units.

493

High-Temperature Motor Windings for Downhole Pumps Used in Geothermal...  

Broader source: Energy.gov (indexed) [DOE]

High-Temperature Motor Windings for Downhole Pumps Used in Geothermal Energy Production High-Temperature Motor Windings for Downhole Pumps Used in Geothermal Energy Production...

494

Summer 2002 Motor Gasoline Outlook2.doc  

Gasoline and Diesel Fuel Update (EIA)

Summer 2002 Motor Gasoline Outlook Summary For the upcoming summer season (April to September 2002), rising average crude oil costs are expected to yield above -average seasonal gasoline price increases at the pump. However, year-over-year comparisons for pump prices are still likely to be lower this summer. Inventories are at higher levels than last year in April, so some cushion against early-season price spikes is in place and price levels are expected to range below last year's averages, assuming no unanticipated disruptions. Still, OPEC production restraint and tightening world oil markets now probably mark the end of the brief respite (since last fall) from two years of relatively high gasoline prices. * Retail gasoline prices (regular grade) are expected to average $1.46 per gallon, 5

495

Blender Net Production of Finished Motor Gasoline  

U.S. Energy Information Administration (EIA) Indexed Site

Product: Total Finished Motor Gasoline Reformulated Gasoline Reformulated Blended w/ Fuel Ethanol Reformulated Other Conventional Gasoline Conventional Blended w/ Fuel Ethanol Conventional Blended w/ Fuel Ethanol, Ed55 and Lower Conventional Blended w/ Fuel Ethanol, Greater than Ed55 Conventional Other Finished Aviation Gasoline Kerosene-Type Jet Fuel Kerosene Distillate Fuel Oil Distillate F.O., 15 ppm Sulfur and under Distillate F.O., Greater than 15 ppm to 500 ppm Sulfur Distillate F.O., Greater than 500 ppm Sulfur Residual Fuel Oil Residual Fuel Less Than 0.31 Percent Sulfur Residual Fuel 0.31 to 1.00 Percent Sulfur Residual Fuel Greater Than 1.00 Percent Sulfur Special Naphthas Lubricants Asphalt and Road Oil Miscellaneous Products Processing Gain(-) or Loss(+) Period-Unit: Monthly-Thousand Barrels Monthly-Thousand Barrels per Day Annual-Thousand Barrels Annual-Thousand Barrels per Day

496

Industrial Electric Motor Systems Market Opportunities Assessment  

E-Print Network [OSTI]

(DOE) Office of Energy Efficiency and Renewable Energy (EERE) in December 1998. As of fiscal year 2000, DOEís Motor Challenge Program was integrated into BestPractices, a broad initiative within EERE. EEREís BestPractices introduces industrial end users to emerging technologies and cost-saving opportunities in widely used industrial systems. Best-Practices offers resources, tools, and information. Thus, industrial end users can match new and verified energy-efficient technologies and practices to their individual plant needs. Since the original printing, there have been some minor changes. The inside and outside back cover (last two pages) were deleted because they contained outdated program information. In addition, some minor corrections were made to the appendices. To obtain another CD of this document you can: ē Contact EEREís Office of Industrial Technologies í (OIT) Clearinghouse:

United S

2002-01-01T23:59:59.000Z

497

The pulsed linear induction motor concept for high-speed trains  

SciTech Connect (OSTI)

The SERAPBIM (SEgmented RAil PHased Induction Motor) concept is a linear induction motor concept which uses rapidly-pulsed magnetic fields and a segmented reaction rail, as opposed to low-frequency fields and continuous reaction rails found in conventional linear induction motors. These improvements give a high-traction, compact, and efficient linear motor that has potential for advanced high speed rail propulsion. In the SERAPBIM concept, coils on the vehicle push against a segmented aluminum rail, which is mounted on the road bed. Current is pulsed as the coils cross an edge of the segmented rail, inducing surface currents which repel the coil. The coils must be pulsed in synchronization with the movement by reaction rail segments. This is provided by a sense-and-fire circuit that controls the pulsing of the power modulators. Experiments were conducted to demonstrate the feasibility of the pulsed induction motor and to collect data that could be used for scaling calculations. A 14.4 kg aluminum plate was accelerated down a 4 m track to speeds of over 15 m/sec with peak thrust up to 18 kN per coilset. For a trainset capable of 200 mph speed, the SERAPHIM concept design is based on coils which are each capable of producing up to 3.5 kN thrust, and 30 coil pairs are mounted on each power car. Two power cars, one at each end of the train, provide 6 MW from two gas turbine prime power units. The thrust is about 210.000 N and is essentially constant up to 200 km/hr since wheel slippage does not limit thrust as with conventional wheeled propulsion. A key component of the SERAPHIM concept is the use of passive wheel-on-rah support for the high speed vehicle. Standard steel wheels are capable of handling over 200 mph. The SERAPHIM cost is comparable to that for steel-wheel high-speed rail, and about 10% to 25% of the projected costs for a comparable Maglev system.

Turman, B.N.; Marder, B.M.; Rohwein, G.J.; Aeschliman, D.P.; Kelley, J.B.; Cowan, M.; Zimmerman, R.M.

1995-06-01T23:59:59.000Z

498

Abstract--This paper presents firstly copper and iron losses models of a classical Switched Reluctance Motor (SRM) and a  

E-Print Network [OSTI]

Reluctance Motor (SRM) and a Mutually Coupled Switched Reluctance Motor (MCSRM), the iron losses in different, this kind of motors could be classed into the Mutually Coupled Switched Reluctance Motor (MCSRM) category reluctance motor (SRM), finite- element method (FEM). I. INTRODUCTION WITCHED Reluctance Motors (SRMs) have

Paris-Sud XI, Université de

499

Effect of Microwave Frequency on Hydrothermal Synthesis of Nanocrystalline Tetragonal Barium Titanate  

E-Print Network [OSTI]

Effect of Microwave Frequency on Hydrothermal Synthesis of Nanocrystalline Tetragonal Barium) with particle sizes ranging from 30 to 100 nm were synthesized via microwave-hydrothermal routes at various, but increased gradually with extended aging time in variable frequency (3-5.5 GHz to 1 s) processing

Dutta, Prabir K.

500

Detectable Changes in the Frequency of Temperature Extremes SIMONE MORAK AND GABRIELE C. HEGERL  

E-Print Network [OSTI]

Detectable Changes in the Frequency of Temperature Extremes SIMONE MORAK AND GABRIELE C. HEGERL of hot and cold extremes over land can be explained by climate variability or whether they show a detectable response to external influences. The authors analyze changes in the frequency of moderate-to-extreme

Hegerl, Gabriele Clarissa "Gabi"