Sample records for dc circuit outage

  1. ENGR 201 Electrical Fundamentals I Catalog Description: Analysis of linear circuits. Circuit laws and theorems. DC response of

    E-Print Network [OSTI]

    ENGR 201 ­ Electrical Fundamentals I Catalog Description: Analysis of linear circuits. Circuit laws and laws · Methods of analysis (e.g., nodal, mesh) · Circuit theorems · Operational amplifiers · Capacitors, and apply these for the analysis of dc circuits (ABET outcomes: A, e, m) 4. Analyze circuits made up

  2. Over-Current Protection Scheme for SiC Power MOSFET DC Circuit Breaker

    E-Print Network [OSTI]

    Zhang, Yuan; Liang, Yung C.

    2015-01-01T23:59:59.000Z

    V. Radun, “SiC based solid state power controller,” in 23tha solid-state circuit breaker based on SiC power MOSFET withSolid-state DC circuit breakers made of the modern wide bandgap power

  3. 1. INTRODUCTION SPICE is a general-purpose circuit simulation program for nonlinear dc, nonlinear transient, and

    E-Print Network [OSTI]

    transient, and linear ac analyses. Circuits may contain resistors, capacitors, inductors, mutual inductors operating point of the circuit with inductors shorted and capacitors opened. The dc analysis options and determines linearized, small-signal models for all of the nonlinear devices in the circuit. The resultant

  4. Outage Log

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)IntegratedSpeeding access toTest andOptimize carbonOther FileDustyOur HistoryOurOutage

  5. Switch contact device for interrupting high current, high voltage, AC and DC circuits

    DOE Patents [OSTI]

    Via, Lester C.; Witherspoon, F. Douglas; Ryan, John M.

    2005-01-04T23:59:59.000Z

    A high voltage switch contact structure capable of interrupting high voltage, high current AC and DC circuits. The contact structure confines the arc created when contacts open to the thin area between two insulating surfaces in intimate contact. This forces the arc into the shape of a thin sheet which loses heat energy far more rapidly than an arc column having a circular cross-section. These high heat losses require a dramatic increase in the voltage required to maintain the arc, thus extinguishing it when the required voltage exceeds the available voltage. The arc extinguishing process with this invention is not dependent on the occurrence of a current zero crossing and, consequently, is capable of rapidly interrupting both AC and DC circuits. The contact structure achieves its high performance without the use of sulfur hexafluoride.

  6. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--II: EXPRESS BRIEFS, VOL. 55, NO. 9, SEPTEMBER 2008 927 Using Transmission Line Outage Data to

    E-Print Network [OSTI]

    Dobson, Ian

    IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--II: EXPRESS BRIEFS, VOL. 55, NO. 9, SEPTEMBER 2008 927 System Hui Ren, Student Member, IEEE, and Ian Dobson, Fellow, IEEE Abstract--We study cascading­Watson branching process model of cascading failure. Index Terms--Failure analysis, power systems, reliability

  7. Radio frequency dc-dc power conversion

    E-Print Network [OSTI]

    Rivas, Juan, 1976-

    2007-01-01T23:59:59.000Z

    THIS THESIS addresses the development of system architectures and circuit topologies for dc-dc power conversion at very high frequencies. The systems architectures that are developed are structured to overcome limitations ...

  8. Development studies of a solid-state d.c. circuit breaker based on the GTO

    E-Print Network [OSTI]

    Kernaghan, William Henry

    1986-01-01T23:59:59.000Z

    by the arc, will ring with the circuit inductance and can produce transient recovery voltages up to twice the a. c. system voltage level. " This voltage can somewhat be controlled by switching in some resistance across the a. c. interrupter as illustrated... of anode voltage which in turn lessens the turn ? off losses of the GTO because high voltages are delayed until IA has decreased. This implies that the maximum controllable current increases as the 16 capacitance is increased. The snubber resistor must...

  9. Lassoing Line Outages in the Smart Power Grid

    E-Print Network [OSTI]

    Zhu, Hao

    2011-01-01T23:59:59.000Z

    Fast and accurate unveiling of power line outages is of paramount importance not only for preventing faults that may lead to blackouts, but also for routine monitoring and control tasks of the smart grid, including state estimation and optimal power flow. Existing approaches are either challenged by the \\emph{combinatorial complexity} issues involved, and are thus limited to identifying single- and double-line outages; or, they invoke less pragmatic assumptions such as \\emph{conditionally independent} phasor angle measurements available across the grid. Using only a subset of voltage phasor angle data, the present paper develops a near real-time algorithm for identifying multiple line outages at the affordable complexity of solving a quadratic program via block coordinate descent iterations. The novel approach relies on reformulating the DC linear power flow model as a \\emph{sparse} overcomplete expansion, and leveraging contemporary advances in compressive sampling and variable selection using the least-abso...

  10. Outage probability at finite SNR

    E-Print Network [OSTI]

    Akçaba, Cemal

    2004-01-01T23:59:59.000Z

    In this thesis, we present a technique to reduce the outage probability of a single user multiple input multiple output (MIMO) channel when a sub-optimal transceiver architecture is used. We show that in slow-fading ...

  11. Circuits & Systems Test Circuits for Characterization of Process, Device, and Interconnect Variation ................................................................................. CS.1

    E-Print Network [OSTI]

    Reif, Rafael

    Circuits & Systems Test Circuits for Characterization of Process, Device, and Interconnect................................................................................................. CS.2 45nm Direct-battery DC-DC Converter for Mobile Applications

  12. DC Circuits - Main Menu

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power Administration would likeConstitution4Customer-Comments Sign InFutureSUBMITTED: GRADE288:050

  13. Commutation circuit for an HVDC circuit breaker

    DOE Patents [OSTI]

    Premerlani, William J. (Scotia, NY)

    1981-01-01T23:59:59.000Z

    A commutation circuit for a high voltage DC circuit breaker incorporates a resistor capacitor combination and a charging circuit connected to the main breaker, such that a commutating capacitor is discharged in opposition to the load current to force the current in an arc after breaker opening to zero to facilitate arc interruption. In a particular embodiment, a normally open commutating circuit is connected across the contacts of a main DC circuit breaker to absorb the inductive system energy trapped by breaker opening and to limit recovery voltages to a level tolerable by the commutating circuit components.

  14. Commutation circuit for an HVDC circuit breaker

    DOE Patents [OSTI]

    Premerlani, W.J.

    1981-11-10T23:59:59.000Z

    A commutation circuit for a high voltage DC circuit breaker incorporates a resistor capacitor combination and a charging circuit connected to the main breaker, such that a commutating capacitor is discharged in opposition to the load current to force the current in an arc after breaker opening to zero to facilitate arc interruption. In a particular embodiment, a normally open commutating circuit is connected across the contacts of a main DC circuit breaker to absorb the inductive system energy trapped by breaker opening and to limit recovery voltages to a level tolerable by the commutating circuit components. 13 figs.

  15. Predictive Compensation for Communication Outages in Networked Control Systems

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    Predictive Compensation for Communication Outages in Networked Control Systems Erik Henriksson Henrik Sandberg Karl Henrik Johansson Abstract-- A predictive outage compensator co time instance, the predictive outage compensator suggests a replacement command based on the history

  16. Auxiliary resonant DC tank converter

    DOE Patents [OSTI]

    Peng, Fang Z. (Knoxville, TN)

    2000-01-01T23:59:59.000Z

    An auxiliary resonant dc tank (ARDCT) converter is provided for achieving soft-switching in a power converter. An ARDCT circuit is coupled directly across a dc bus to the inverter to generate a resonant dc bus voltage, including upper and lower resonant capacitors connected in series as a resonant leg, first and second dc tank capacitors connected in series as a tank leg, and an auxiliary resonant circuit comprising a series combination of a resonant inductor and a pair of auxiliary switching devices. The ARDCT circuit further includes first clamping means for holding the resonant dc bus voltage to the dc tank voltage of the tank leg, and second clamping means for clamping the resonant dc bus voltage to zero during a resonant period. The ARDCT circuit resonantly brings the dc bus voltage to zero in order to provide a zero-voltage switching opportunity for the inverter, then quickly rebounds the dc bus voltage back to the dc tank voltage after the inverter changes state. The auxiliary switching devices are turned on and off under zero-current conditions. The ARDCT circuit only absorbs ripples of the inverter dc bus current, thus having less current stress. In addition, since the ARDCT circuit is coupled in parallel with the dc power supply and the inverter for merely assisting soft-switching of the inverter without participating in real dc power transmission and power conversion, malfunction and failure of the tank circuit will not affect the functional operation of the inverter; thus a highly reliable converter system is expected.

  17. GUIDELINES FOR IMPLEMENTATION OF AN ADVANCED OUTAGE CONTROL CENTER TO IMPROVE OUTAGE COORDINATION, PROBLEM RESOLUTION, AND OUTAGE RISK MANAGEMENT

    SciTech Connect (OSTI)

    Germain, Shawn St; Farris, Ronald; Whaley, April M; Medema, Heather; Gertman, David

    2014-09-01T23:59:59.000Z

    This research effort is a part of the Light-Water Reactor Sustainability (LWRS) Program, which is a research and development (R&D) program sponsored by Department of Energy (DOE) and performed in close collaboration with industry R&D programs that provide the technical foundations for licensing and managing the long-term, safe, and economical operation of current nuclear power plants. The LWRS program serves to help the U.S. nuclear industry adopt new technologies and engineering solutions that facilitate the continued safe operation of the plants and extension of the current operating licenses. Managing NPP outages is a complex and difficult task due to the large number of maintenance and repair activities that are accomplished in a short period of time. During an outage, the outage control center (OCC) is the temporary command center for outage managers and provides several critical functions for the successful execution of the outage schedule. Essentially, the OCC functions to facilitate information inflow, assist outage management in processing information, and to facilitate the dissemination of information to stakeholders. Currently, outage management activities primarily rely on telephone communication, face to face reports of status, and periodic briefings in the OCC. It is a difficult task to maintain current the information related to outage progress and discovered conditions. Several advanced communication and collaboration technologies have shown promise for facilitating the information flow into, across, and out of the OCC. The use of these technologies will allow information to be shared electronically, providing greater amounts of real-time information to the decision makers and allowing OCC coordinators to meet with supporting staff remotely. Passively monitoring status electronically through advances in the areas of mobile worker technologies, computer-based procedures, and automated work packages will reduce the current reliance on manually reporting progress. The use of these technologies will also improve the knowledge capture and management capabilities of the organization. The purpose of this research is to improve management of NPP outages through the development of an advanced outage control center (AOCC) that is specifically designed to maximize the usefulness of communication and collaboration technologies for outage coordination and problem resolution activities. This technical report for industry implementation outlines methods and considerations for the establishment of an AOCC. This report provides a process for implementation of a change management plan, evaluation of current outage processes, the selection of technology, and guidance for the implementation of the selected technology. Methods are presented for both adoption of technologies within an existing OCC and for a complete OCC replacement, including human factors considerations for OCC design and setup.

  18. Nanosecond pulsed electric fields (nsPEFs) low cost generator design using power MOSFET and Cockcroft-Walton multiplier circuit as high voltage DC source

    SciTech Connect (OSTI)

    Sulaeman, M. Y.; Widita, R. [Department of Physics, Nuclear Physics and Biophysics Research Division, Faculty of Mathematics and Natural Science, Institut Teknologi Bandung, Bandung (Indonesia)

    2014-09-30T23:59:59.000Z

    Purpose: Non-ionizing radiation therapy for cancer using pulsed electric field with high intensity field has become an interesting field new research topic. A new method using nanosecond pulsed electric fields (nsPEFs) offers a novel means to treat cancer. Not like the conventional electroporation, nsPEFs able to create nanopores in all membranes of the cell, including membrane in cell organelles, like mitochondria and nucleus. NsPEFs will promote cell death in several cell types, including cancer cell by apoptosis mechanism. NsPEFs will use pulse with intensity of electric field higher than conventional electroporation, between 20–100 kV/cm and with shorter duration of pulse than conventional electroporation. NsPEFs requires a generator to produce high voltage pulse and to achieve high intensity electric field with proper pulse width. However, manufacturing cost for creating generator that generates a high voltage with short duration for nsPEFs purposes is highly expensive. Hence, the aim of this research is to obtain the low cost generator design that is able to produce a high voltage pulse with nanosecond width and will be used for nsPEFs purposes. Method: Cockcroft-Walton multiplier circuit will boost the input of 220 volt AC into high voltage DC around 1500 volt and it will be combined by a series of power MOSFET as a fast switch to obtain a high voltage with nanosecond pulse width. The motivation using Cockcroft-Walton multiplier is to acquire a low-cost high voltage DC generator; it will use capacitors and diodes arranged like a step. Power MOSFET connected in series is used as voltage divider to share the high voltage in order not to damage them. Results: This design is expected to acquire a low-cost generator that can achieve the high voltage pulse in amount of ?1.5 kV with falltime 3 ns and risetime 15 ns into a 50? load that will be used for nsPEFs purposes. Further detailed on the circuit design will be explained at presentation.

  19. Reduced-Order Predictive Outage Compensators for Networked Systems

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    Reduced-Order Predictive Outage Compensators for Networked Systems Erik Henriksson Henrik Sandberg communication outage of several samples in situations when the radio environment is noisy and low transmission power is desirable. We propose a method to compensate for outages by introducing a predictive outage

  20. Triple voltage dc-to-dc converter and method

    DOE Patents [OSTI]

    Su, Gui-Jia (Knoxville, TN)

    2008-08-05T23:59:59.000Z

    A circuit and method of providing three dc voltage buses and transforming power between a low voltage dc converter and a high voltage dc converter, by coupling a primary dc power circuit and a secondary dc power circuit through an isolation transformer; providing the gating signals to power semiconductor switches in the primary and secondary circuits to control power flow between the primary and secondary circuits and by controlling a phase shift between the primary voltage and the secondary voltage. The primary dc power circuit and the secondary dc power circuit each further comprising at least two tank capacitances arranged in series as a tank leg, at least two resonant switching devices arranged in series with each other and arranged in parallel with the tank leg, and at least one voltage source arranged in parallel with the tank leg and the resonant switching devices, said resonant switching devices including power semiconductor switches that are operated by gating signals. Additional embodiments having a center-tapped battery on the low voltage side and a plurality of modules on both the low voltage side and the high voltage side are also disclosed for the purpose of reducing ripple current and for reducing the size of the components.

  1. Phase-Shifted Full Bridge DC-DC Converter with Energy Recovery Clamp and Reduced Circulating Current

    E-Print Network [OSTI]

    of the switch conduction and turn-off losses achieved by an energy recovery secondary clamp circuit an improved PSFB DC-DC converter using only a modified energy recovery clamp circuit attached at the secondaryPhase-Shifted Full Bridge DC-DC Converter with Energy Recovery Clamp and Reduced Circulating

  2. DC attenuation meter

    DOE Patents [OSTI]

    Hargrove, Douglas L.

    2004-09-14T23:59:59.000Z

    A portable, hand-held meter used to measure direct current (DC) attenuation in low impedance electrical signal cables and signal attenuators. A DC voltage is applied to the signal input of the cable and feedback to the control circuit through the signal cable and attenuators. The control circuit adjusts the applied voltage to the cable until the feedback voltage equals the reference voltage. The "units" of applied voltage required at the cable input is the system attenuation value of the cable and attenuators, which makes this meter unique. The meter may be used to calibrate data signal cables, attenuators, and cable-attenuator assemblies.

  3. Contingency Analysis of Cascading Line Outage Events

    SciTech Connect (OSTI)

    Thomas L Baldwin; Magdy S Tawfik; Miles McQueen

    2011-03-01T23:59:59.000Z

    As the US power systems continue to increase in size and complexity, including the growth of smart grids, larger blackouts due to cascading outages become more likely. Grid congestion is often associated with a cascading collapse leading to a major blackout. Such a collapse is characterized by a self-sustaining sequence of line outages followed by a topology breakup of the network. This paper addresses the implementation and testing of a process for N-k contingency analysis and sequential cascading outage simulation in order to identify potential cascading modes. A modeling approach described in this paper offers a unique capability to identify initiating events that may lead to cascading outages. It predicts the development of cascading events by identifying and visualizing potential cascading tiers. The proposed approach was implemented using a 328-bus simplified SERC power system network. The results of the study indicate that initiating events and possible cascading chains may be identified, ranked and visualized. This approach may be used to improve the reliability of a transmission grid and reduce its vulnerability to cascading outages.

  4. Outage management and health physics issue, 2007

    SciTech Connect (OSTI)

    Agnihotri, Newal (ed.)

    2007-05-15T23:59:59.000Z

    The focus of the May-June issue is on outage management and health physics. Major articles/reports in this issue include: India: a potential commercial opportunity, a U.S. Department of Commerce Report, by Joe Neuhoff and Justin Rathke; The changing climate for nuclear energy, by Skip Bowman, Nuclear Energy Insitute; Selecting protective clothing, by J. Mark Price, Southern California Edison; and Succssful refurbishment outage, by Sudesh K. Gambhir, Omaha Public Power District. Industry innovation articles in this issue are: Containment radiation monitoring spiking, by Michael W. Lantz and Robert Routolo, Arizona Public Service Company; Improved outage performance, by Michael Powell and Troy Wilfong, Arizona Public Service Company, Palo Verde Nuclear Generating Station; Stop repacking valves and achieve leak-free performance, by Kenneth Hart, PPL Susquehanna LLC; and Head assembly upgrade package, by Timothy Petit, Dominion Nuclear.

  5. Hopper compilers and DDT short outage next Wed, May 16

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

    compilers and DDT short outage next Wed, May 16 Hopper compilers and DDT short outage next Wed, May 16 May 10, 2012 (0 Comments) Due to a scheduled maintenance for the License...

  6. Outage managment and health physics issue, 2008

    SciTech Connect (OSTI)

    Agnihotri, Newal (ed.)

    2008-05-15T23:59:59.000Z

    The focus of the May-June issue is on outage management and health physics. Major articles include: Outage optimization initiatives, by George B. Beam, AREVA NP, Inc.; New plant based on excellent track records, by Jim Scarola, Progress Energy; Meeting customer needs and providing environmental benefits, by Peter S. Hastings, Duke Energy; Plants with 3-D design, by Jack A. Bailey, Tennessee Valley Authority; and Highest quality with exceptional planning, by Jason A. Walls, Duke Energy. Industry innovation articles include: Integrated exposure reduction plan, by Ed Wolfe, Exelon; Performance-based radiation worker training, by Joe Giuffre and Timothy Vriezerma, American Electric Power.

  7. A Preliminary Analysis of Network Outages During Hurricane Sandy

    E-Print Network [OSTI]

    Heidemann, John

    A Preliminary Analysis of Network Outages During Hurricane Sandy USC/ISI Technical Report ISI outages during the October 2012 Hurricane Sandy. We assess net- work reliability by pinging a sample network outages, we see that the out- age rate in U.S. networks doubled when the hurricane made landfall

  8. Impact of Input Voltage Sag and Unbalance on DC Link Inductor and Capacitor Stress in Adjustable Speed Drives

    E-Print Network [OSTI]

    Lipo, Thomas

    , outages, voltage surges and sags. Power quality problems induced in adjustable-speed drives (ASDs) have (120 Hz for 60 Hz system) that increases the electrical stresses on the dc bus choke inductor (if used

  9. Primary Outage-Based Resource Allocation Strategies

    E-Print Network [OSTI]

    Gesbert, David

    , the scheme would have governed transmitter power on a variable basis calculated to limit the energy at victim, 2003). Rather than merely regulate transmitter power at fixed levels, as it has been done in the past in this work by proposing three resource management strategies based on outage probability. The motivation

  10. Outage management and health physics issue, 2006

    SciTech Connect (OSTI)

    Agnihotri, Newal (ed.)

    2006-05-15T23:59:59.000Z

    The focus of the May-June issue is on outage management and health physics. Major articles/reports in this issue include: A design with experience for the U.S., by Michael J. Wallace, Constellation Generation Group; Hope to be among the first, by Randy Hutchinson, Entergy Nuclear; Plans to file COLs in 2008, by Garry Miller, Progress Energy; Evolution of ICRP's recommendations, by Lars-Erik Holm, ICRP; European network on education and training in radiological protection, by Michele Coeck, SCK-CEN, Belgium; Outage managment: an important tool for improving nuclear power plant performance, by Thomas Mazour and Jiri Mandula, IAEA, Austria; and Plant profile: Exploring new paths to excellence, by Anne Thomas, Exelon Nuclear.

  11. Advanced Outage and Control Center: Strategies for Nuclear Plant Outage Work Status Capabilities

    SciTech Connect (OSTI)

    Gregory Weatherby

    2012-05-01T23:59:59.000Z

    The research effort is a part of the Light Water Reactor Sustainability (LWRS) Program. LWRS is a research and development program sponsored by the Department of Energy, performed in close collaboration with industry to provide the technical foundations for licensing and managing the long-term, safe and economical operation of current nuclear power plants. The LWRS Program serves to help the US nuclear industry adopt new technologies and engineering solutions that facilitate the continued safe operation of the plants and extension of the current operating licenses. The Outage Control Center (OCC) Pilot Project was directed at carrying out the applied research for development and pilot of technology designed to enhance safe outage and maintenance operations, improve human performance and reliability, increase overall operational efficiency, and improve plant status control. Plant outage management is a high priority concern for the nuclear industry from cost and safety perspectives. Unfortunately, many of the underlying technologies supporting outage control are the same as those used in the 1980’s. They depend heavily upon large teams of staff, multiple work and coordination locations, and manual administrative actions that require large amounts of paper. Previous work in human reliability analysis suggests that many repetitive tasks, including paper work tasks, may have a failure rate of 1.0E-3 or higher (Gertman, 1996). With between 10,000 and 45,000 subtasks being performed during an outage (Gomes, 1996), the opportunity for human error of some consequence is a realistic concern. Although a number of factors exist that can make these errors recoverable, reducing and effectively coordinating the sheer number of tasks to be performed, particularly those that are error prone, has the potential to enhance outage efficiency and safety. Additionally, outage management requires precise coordination of work groups that do not always share similar objectives. Outage managers are concerned with schedule and cost, union workers are concerned with performing work that is commensurate with their trade, and support functions (safety, quality assurance, and radiological controls, etc.) are concerned with performing the work within the plants controls and procedures. Approaches to outage management should be designed to increase the active participation of work groups and managers in making decisions that closed the gap between competing objectives and the potential for error and process inefficiency.

  12. How individual traces and interactive timelines could support outage execution - Toward an outage historian concept

    SciTech Connect (OSTI)

    Parfouru, S.; De-Beler, N. [EDF Recherche and Developpement, 6 quai Watier, 78400 Chatou (France)

    2012-07-01T23:59:59.000Z

    In the context of a project that is designing innovative ICT-based solutions for the organizational concept of outage management, we focus on the informational process of the OCR (Outage Control Room) underlying the execution of the outages. Informational process are based on structured and unstructured documents that have a key role in the collaborative processes and management of the outage. We especially track the structured and unstructured documents, electronically or not, from creation to sharing. Our analysis allows us to consider that the individual traces produced by an individual participant with a specific role could be multi-purpose and support sharing between participants without creating duplication of work. The ultimate goal is to be able to generate an outage historian, that is not just focused on highly structured information, which could be useful to improve the continuity of information between participants. We study the implementation of this approach through web technologies and social media tools to address this issue. We also investigate the issue of data access through interactive visualization timelines coupled with other modality's to assist users in the navigation and exploration of the proposed historian. (authors)

  13. ECE 202: Circuit Theory Applications

    E-Print Network [OSTI]

    Schumacher, Russ

    : - Cadence - MATLAB IN OUT - Can analyze source-free RL, RC, and RLC circuits - Can calculate step response Numbers Algebra DC Circuit Analysis - Laplace transform - Bode plots - Complex response - Can calculate Filter Analysis Frequency Response and Filters AC Power Analysis AC Circuit Analysis Concepts

  14. Power Outage 1. Remain Calm; provide assistance to others if necessary.

    E-Print Network [OSTI]

    Hickman, Mark

    Power Outage 1. Remain Calm; provide assistance to others if necessary. 2. Report the outage, call. Campus-wide telephone communications will continue to operate during a power outage on standard phones. If emergency assistance is required, call UC Security on Extn 6111 and state "POWEr OUTAgE" or mobile 0800 823

  15. Outages of electric power supply resulting from cable failures Boston Edison Company system

    SciTech Connect (OSTI)

    None

    1980-07-01T23:59:59.000Z

    Factual data are provided regarding 5 electric power supply interruptions that occurred in the Boston Metropolitan area during April to June, 1979. Common to all of these outages was the failure of an underground cable as the initiating event, followed by multiple equipment failures. There was significant variation in the voltage ratings and types of cables which failed. The investigation was unable to delineate a single specific Boston Edison design operating or maintenance practice that could be cited as the cause of the outages. After reviewing the investigative report the following actions were recommended: the development and implementation of a plan to eliminate the direct current cable network; develop a network outage restoration plan; regroup primary feeder cables wherever possible to minimize the number of circuits in manholes, and to separate feeders to high load density areas; develop a program to detect incipient cable faults; evaluate the separation of the north and south sections of Back Bay network into separate networks; and, as a minimum, install the necessary facilities to make it possible to re-energize one section without interfering with the other; and re-evaluate the cathodic protection scheme where necessary. (LCL)

  16. Plant maintenance and outage management issue, 2005

    SciTech Connect (OSTI)

    Agnihotri, Newal (ed.)

    2005-01-15T23:59:59.000Z

    The focus of the January-February issue is on plant maintenance and outage managment. Major articles/reports in this issue include: Dawn of a new era, by Joe Colvin, Nuclear Energy Institute (NEI); Plant profile: Beloyarsk NPP, Russia, by Nikolai Oshkanov, Beloyarsk NPP, Russia; Improving economic performance, by R. Spiegelberg-Planner, John De Mella, and Marius Condu, IAEA; A model for improving performance, by Pet Karns, MRO Software; ASME codes and standards, by Shannon Burke, ASME International; and, Refurbishment programs, by Craig S. Irish, Nuclear Logistics, Inc.

  17. Electricity Case: Statistical Analysis of Electric Power Outages

    E-Print Network [OSTI]

    Wang, Hai

    Electricity Case: Statistical Analysis of Electric Power Outages CREATE Report Jeffrey S. Simonoff: Statistical Analysis of Electric Power Outages CREATE Report July 26, 2005 Jeffrey S. Simonoff (NYU of the United States Department of Homeland Security. #12;0 Electricity Case, Report 3 Electricity Case

  18. Does Beamforming achieve Outage Capacity with Direction Feedback?

    E-Print Network [OSTI]

    Jafar, Syed A.

    Does Beamforming achieve Outage Capacity with Direction Feedback? Sudhir Srinivasa and Syed Ali Jafar Sriram Vishwanath Electrical Engineering and Computer Science Electrical and Computer Engineering: syed@ece.uci.edu, sudhirs@uci.edu Email: sriram@ece.utexas.edu Abstract We explore the outage capacity

  19. Outage behavior with delay and CSIT Dinesh Rajan

    E-Print Network [OSTI]

    Rajan, Dinesh

    Outage behavior with delay and CSIT Dinesh Rajan Department of electrical engineering Southern of electrical and computer engineering Rice University, Houston, Texas. ashu@rice.edu, aaz@rice.edu Abstract-- In this paper, we demonstrate that the packet outage probability for fading channels can be significantly

  20. Technology Integration Initiative In Support of Outage Management

    SciTech Connect (OSTI)

    Gregory Weatherby; David Gertman

    2012-07-01T23:59:59.000Z

    Plant outage management is a high priority concern for the nuclear industry from cost and safety perspectives. Often, command and control during outages is maintained in the outage control center where many of the underlying technologies supporting outage control are the same as those used in the 1980’s. This research reports on the use of advanced integrating software technologies and hand held mobile devices as a means by which to reduce cycle time, improve accuracy, and enhance transparency among outage team members. This paper reports on the first phase of research supported by the DOE Light Water Reactor Sustainability (LWRS) Program that is performed in close collaboration with industry to examine the introduction of newly available technology allowing for safe and efficient outage performance. It is thought that this research will result in: improved resource management among various plant stakeholder groups, reduced paper work, and enhanced overall situation awareness for the outage control center management team. A description of field data collection methods, including personnel interview data, success factors, end-user evaluation and integration of hand held devices in achieving an integrated design are also evaluated. Finally, the necessity of obtaining operations cooperation support in field studies and technology evaluation is acknowledged.

  1. High voltage DC power supply

    DOE Patents [OSTI]

    Droege, Thomas F. (Batavia, IL)

    1989-01-01T23:59:59.000Z

    A high voltage DC power supply having a first series resistor at the output for limiting current in the event of a short-circuited output, a second series resistor for sensing the magnitude of output current, and a voltage divider circuit for providing a source of feedback voltage for use in voltage regulation is disclosed. The voltage divider circuit is coupled to the second series resistor so as to compensate the feedback voltage for a voltage drop across the first series resistor. The power supply also includes a pulse-width modulated control circuit, having dual clock signals, which is responsive to both the feedback voltage and a command voltage, and also includes voltage and current measuring circuits responsive to the feedback voltage and the voltage developed across the second series resistor respectively.

  2. High voltage DC power supply

    DOE Patents [OSTI]

    Droege, T.F.

    1989-12-19T23:59:59.000Z

    A high voltage DC power supply having a first series resistor at the output for limiting current in the event of a short-circuited output, a second series resistor for sensing the magnitude of output current, and a voltage divider circuit for providing a source of feedback voltage for use in voltage regulation is disclosed. The voltage divider circuit is coupled to the second series resistor so as to compensate the feedback voltage for a voltage drop across the first series resistor. The power supply also includes a pulse-width modulated control circuit, having dual clock signals, which is responsive to both the feedback voltage and a command voltage, and also includes voltage and current measuring circuits responsive to the feedback voltage and the voltage developed across the second series resistor respectively. 7 figs.

  3. Development of Methodologies for Technology Deployment for Advanced Outage Control Centers that Improve Outage Coordination, Problem Resolution and Outage Risk Management

    SciTech Connect (OSTI)

    Shawn St. Germain; Ronald Farris; Heather Medeman

    2013-09-01T23:59:59.000Z

    This research effort is a part of the Light-Water Reactor Sustainability (LWRS) Program, which is a research and development (R&D) program sponsored by Department of Energy (DOE) and performed in close collaboration with industry R&D programs that provides the technical foundations for licensing and managing the long-term, safe, and economical operation of current nuclear power plants. The LWRS program serves to help the U.S. nuclear industry adopt new technologies and engineering solutions that facilitate the continued safe operation of the plants and extension of the current operating licenses. The long term viability of existing nuclear power plants in the U.S. will depend upon maintaining high capacity factors, avoiding nuclear safety issues and reducing operating costs. The slow progress in the construction on new nuclear power plants has placed in increased importance on maintaining the output of the current fleet of nuclear power plants. Recently expanded natural gas production has placed increased economic pressure on nuclear power plants due to lower cost competition. Until recently, power uprate projects had steadily increased the total output of the U.S. nuclear fleet. Errors made during power plant upgrade projects have now removed three nuclear power plants from the U.S. fleet and economic considerations have caused the permanent shutdown of a fourth plant. Additionally, several utilities have cancelled power uprate projects citing economic concerns. For the past several years net electrical generation from U.S. nuclear power plants has been declining. One of few remaining areas where significant improvements in plant capacity factors can be made is in minimizing the duration of refueling outages. Managing nuclear power plant outages is a complex and difficult task. Due to the large number of complex tasks and the uncertainty that accompanies them, outage durations routinely exceed the planned duration. The ability to complete an outage on or near schedule depends upon the performance of the outage management organization. During an outage, the outage control center (OCC) is the temporary command center for outage managers and provides several critical functions for the successful execution of the outage schedule. Essentially, the OCC functions to facilitate information inflow, assist outage management in processing information and to facilitate the dissemination of information to stakeholders. Currently, outage management activities primarily rely on telephone communication, face to face reports of status and periodic briefings in the OCC. Much of the information displayed in OCCs is static and out of date requiring an evaluation to determine if it is still valid. Several advanced communication and collaboration technologies have shown promise for facilitating the information flow into, across and out of the OCC. Additionally, advances in the areas of mobile worker technologies, computer based procedures and electronic work packages can be leveraged to improve the availability of real time status to outage managers.

  4. Power line damage, electrical outages, reduced in the {open_quotes}sleet belt{close_quotes}

    SciTech Connect (OSTI)

    NONE

    1998-04-01T23:59:59.000Z

    Companies that depend on reliable supplies of electricity, as well as electrical utilities, need to defend against weather-related damage and power outages. Weather-related damage claims in the U.S. totaled $16 billion during the ten-year span from 1980 through 1989 and have already reached $48 billion in the first five years of this decade, evidence that climate change could be causing more severe storms. This makes technology that minimizes weather damage all the more welcome. Ice and snow build-up on high-voltage electric power lines in a moderate to high winds causes high-amplitude low-frequency mechanical vibrations, called galloping. When power lines react aero-elastically to these conditions, undamped vibration tears apart transmission towers and fittings or propels lines into each other, shorting out large circuits. Besides causing costly electric system outages and structural damage, this dramatic phenomenon steals power through higher electricity line losses that occur when other conductors have to carry more power to compensate for a tripped or damaged line. In a 1981 survey, 17 of 38 utilities reported that galloping was a moderate to severe problem, and 11 reported that they had a galloping event at least once a year. Fifty-seven percent of the incidents included flashover, and 60% included structural damage.

  5. SAMPLE RESULTS FROM MCU SOLIDS OUTAGE

    SciTech Connect (OSTI)

    Peters, T.; Washington, A.; Oji, L.; Coleman, C.; Poirier, M.

    2014-09-22T23:59:59.000Z

    Savannah River National Laboratory (SRNL) has received several solid and liquid samples from MCU in an effort to understand and recover from the system outage starting on April 6, 2014. SRNL concludes that the presence of solids in the Salt Solution Feed Tank (SSFT) is the likely root cause for the outage, based upon the following discoveries ? A solids sample from the extraction contactor #1 proved to be mostly sodium oxalate ? A solids sample from the scrub contactor#1 proved to be mostly sodium oxalate ? A solids sample from the Salt Solution Feed Tank (SSFT) proved to be mostly sodium oxalate ? An archived sample from Tank 49H taken last year was shown to contain a fine precipitate of sodium oxalate ? A solids sample from the extraction contactor #1 drain pipe from extraction contactor#1 proved to be mostly sodium aluminosilicate ? A liquid sample from the SSFT was shown to have elevated levels of oxalate anion compared to the expected concentration in the feed Visual inspection of the SSFT indicated the presence of precipitated or transferred solids, which were likely also in the Salt Solution Receipt Tank (SSRT). The presence of the solids coupled with agitation performed to maintain feed temperature resulted in oxalate solids migration through the MCU system and caused hydraulic issues that resulted in unplanned phase carryover from the extraction into the scrub, and ultimately the strip contactors. Not only did this carryover result in the Strip Effluent (SE) being pushed out of waste acceptance specification, but it resulted in the deposition of solids into several of the contactors. At the same time, extensive deposits of aluminosilicates were found in the drain tube in the extraction contactor #1. However it is not known at this time how the aluminosilicate solids are related to the oxalate solids. The solids were successfully cleaned out of the MCU system. However, future consideration must be given to the exclusion of oxalate solids into the MCU system. There were 53 recommendations for improving operations recently identified. Some additional considerations or additional details are provided below as recommendations. ? From this point on, IC-Anions analyses of the DSSHT should be part of the monthly routine analysis in order to spot negative trends in the oxalate leaving the MCU system. Care must be taken to monitor the oxalate content to watch for sudden precipitation of oxalate salts in the system. ? Conduct a study to optimize the cleaning strategy at ARP-MCU through decreasing the concentration or entirely eliminating the oxalic acid. ? The contents of the SSFT should remain unagitated. Routine visual observation should be maintained to ensure there is not a large buildup of solids. As water with agitation provided sufficient removal of the solids in the feed tank, it should be considered as a good means for dissolving oxalate solids if they are found in the future. ? Conduct a study to improve prediction of oxalate solubility in salt batch feed materials. As titanium and mercury have been found in various solids in this report, evaluate if either element plays a role in oxalate solubility during processing. ? Salt batch characterization focuses primarily on characterization and testing of unaltered Tank 21H material; however, non-typical feeds are developed through cleaning, washing, and/or sump transfers. As these solutions are processed through MCU, they may precipitate solids or reduce performance. Salt batch characterization and testing should be expanded to encompass a broader range of feeds that may be processed through ARPMCU.

  6. Design and analysis of a zero-voltage switching scheme for a dc- to-dc converter

    E-Print Network [OSTI]

    Arun, G.

    1992-01-01T23:59:59.000Z

    5S 59 VITA . 65 I. IST OF FICI;RES FIGURE Page Linear versus switch-mode power convers&on Components of a switch-mode dc-to-dc converter 3 A typical dc-to-dc converter system Basic buck converter Basic boost converter Basic buck...-boost converter 7 One leg of a, dc-to-dc converter. Turn-on and turn-off scenartos in switch-mode operation. 16 10 Switching loci in the ur ? ir plane. Circuit for. zero-voltage sw&tching. . Mode 1 17 90 Mode? Mode I Mode 5 oo 93 Typical voltage...

  7. Overview of Common Mode Outages in Power Systems

    SciTech Connect (OSTI)

    Papic, Milorad; Awodele , Kehinde; Billinton, Roy; Dent, Chris; Eager, Dan; Hamoud, Gomaa; Jirutitijaroen, Panida; Kumbale, Murali; Mitra, Joydeep; Samaan, Nader A.; Schneider, Alex; Singh, Chanan

    2012-11-10T23:59:59.000Z

    This paper is a result of ongoing activity carried out by Probability Applications for Common Mode Events (PACME) Task Force under the Reliability Risk and Probability Applications (RRPA) Subcommittee. The paper is intended to constitute a valid source of information and references about dealing with common-mode outages in power systems reliability analysis. This effort involves reviewing published literature and presenting state-of-the-art research and practical applications in the area of common-mode outages. Evaluation of available outage statistics show that there is a definite need for collective effort from academia and industry to not only recommended procedures for data collection and monitoring but also to provide appropriate mathematical models to assess such events.

  8. The detection, prevention and mitigation of cascading outages in the power system

    E-Print Network [OSTI]

    Song, Hongbiao

    2009-05-15T23:59:59.000Z

    This dissertation studies the causes and mechanism of power system cascading outages and develops new methods and new tools to help detect, prevent and mitigate the outages. Three effective solutions: a steady state control scheme, a transient...

  9. Bi-directional dc-dc Converter

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

    Purpose of Work for FY08 1. Vehicle modeling, simulation, and operation voltages optimization. 2. DC-DC Power converter and control modeling. 3. Silicon Carbide device...

  10. Bi-directional dc-dc Converter

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

    MTBF Dc-dc Fabrication Validation Data Performance Validation BOM and Cost analysis EMIEMC Custom Components Fabrication Components Validation Vehicle System Review Phase-I...

  11. IEEE COMMUNICATIONS LETTERS, VOL. 17, NO. 1, JANUARY 2013 127 Capacity of Zero-Outage Scheme

    E-Print Network [OSTI]

    Candan, Cagatay

    IEEE COMMUNICATIONS LETTERS, VOL. 17, NO. 1, JANUARY 2013 127 Capacity of Zero-Outage Scheme Under Imprecise Channel State Information C¸ a~gatay Candan Abstract--The capacity of zero-outage scheme-to-noise-ratio fluctuates and the scheme suffers from com- munication outages. Exact analytical expressions characterizing

  12. Proof of the outage probability conjecture for MISO channels

    E-Print Network [OSTI]

    Abbe, Emmanuel; Telatar, Emre

    2011-01-01T23:59:59.000Z

    In Telatar 1999, it is conjectured that the covariance matrices minimizing the outage probability for MIMO channels with Gaussian fading are diagonal with either zeros or constant values on the diagonal. In the MISO setting, this is equivalent to conjecture that the Gaussian quadratic forms having largest tale probability correspond to such diagonal matrices. We prove here the conjecture in the MISO setting.

  13. Preventing power outages Power system contingency analysis on the GPU

    E-Print Network [OSTI]

    Vuik, Kees

    problem. Moreover, the power system has to keep functioning properly even when a transmission line failsPreventing power outages Power system contingency analysis on the GPU To provide electricity generators, nuclear power plants, wind turbines, etc.) and a network of lines and cables to transmit

  14. Onsite Wastewater Treatment Systems: Responding to Power Outages and Floods

    E-Print Network [OSTI]

    Lesikar, Bruce J.; Mechell, Justin; Alexander, Rachel

    2008-10-23T23:59:59.000Z

    People and the environment can be harmed if a home's onsite wastewater treatment system does not work properly after a flood or power outage. This publication explains the steps to take after such an event to get the system back into service. 4 pp...

  15. Collaboration Surfaces for Outage Control Centers Lars Hurlen

    E-Print Network [OSTI]

    Deussen, Oliver

    , particularly for the nuclear and petroleum domains where the overall complexity, safety concerns and challengesCollaboration Surfaces for Outage Control Centers Lars Hurlen Institute for Energy Technology Os Allé 7 1777 Halden, Norway +47 69212242 lars.hurlen@hrp.no Bojana Petkov Institute for Energy

  16. Outage Probability Analysis of Distributed Reception with Hard Decision Exchanges

    E-Print Network [OSTI]

    Brown III, Donald R.

    Outage Probability Analysis of Distributed Reception with Hard Decision Exchanges Rui Wang, D. Richard Brown III, Min Ni Dept. of Electrical and Computer Eng. Worcester Polytechnic Institute 100 Institute Rd, Worcester, MA 01609 Email: {rwang,drb,minni@wpi.edu} Upamanyu Madhow Dept. of Electrical

  17. Assessment of Critical Events Corridors through Multivariate Cascading Outages Analysis

    SciTech Connect (OSTI)

    Makarov, Yuri V.; Samaan, Nader A.; Diao, Ruisheng; Kumbale, Murali; Chen, Yousu; Singh, Ruchi; Green, Irina; Morgan, Mark P.

    2011-10-17T23:59:59.000Z

    Massive blackouts of electrical power systems in North America over the past decade has focused increasing attention upon ways to identify and simulate network events that may potentially lead to widespread network collapse. This paper summarizes a method to simulate power-system vulnerability to cascading failures to a supplied set of initiating events synonymously termed as Extreme Events. The implemented simulation method is currently confined to simulating steady state power-system response to a set of extreme events. The outlined method of simulation is meant to augment and provide a new insight into bulk power transmission network planning that at present remains mainly confined to maintaining power system security for single and double component outages under a number of projected future network operating conditions. Although one of the aims of this paper is to demonstrate the feasibility of simulating network vulnerability to cascading outages, a more important goal has been to determine vulnerable parts of the network that may potentially be strengthened in practice so as to mitigate system susceptibility to cascading failures. This paper proposes to demonstrate a systematic approach to analyze extreme events and identify vulnerable system elements that may be contributing to cascading outages. The hypothesis of critical events corridors is proposed to represent repeating sequential outages that can occur in the system for multiple initiating events. The new concept helps to identify system reinforcements that planners could engineer in order to 'break' the critical events sequences and therefore lessen the likelihood of cascading outages. This hypothesis has been successfully validated with a California power system model.

  18. Outage Rate Regions for the MISO Interference Channel: Definitions and Interpretations

    E-Print Network [OSTI]

    Lindblom, Johannes; Larsson, Erik G

    2011-01-01T23:59:59.000Z

    We consider the slow-fading two-user multiple-input single-output (MISO) interference channel (IC), where the receivers treat the interference as additive Gaussian noise. We study the rate points that can be achieved, allowing a non-zero outage probability. The points which meet the outage probability specification constitute a so-called outage rate region. There exist several definitions of the outage rate regions for the IC, as for the broadcast and the multiple-access channels. We give four definitions for the outage region of the MISO IC. The definitions differ on whether the rates are declared in outage jointly or individually and whether there is instantaneous or statistical channel state information (CSI) at the transmitters. For the statistical CSI scenario, we discuss how to find the outage probabilities in closed form. We provide interpretations of the definitions and compare the corresponding regions via analytical and numerical results.

  19. 82 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS, PART 1, VOL. 47, NO. 1, JANUARY 2000 Fig. 5. Output voltage waveform in the closed-loop dc-ac power inverter.

    E-Print Network [OSTI]

    Leuciuc, Adrian

    voltage waveform in the closed-loop dc-ac power inverter. Horizontal scale: 5 ms/div.; vertical scale: 0.2 V/div. Fig. 6. Bode plots of the closed-loop power inverter . Packard 4194A Network Analyzer, Bode that the -3-dB frequency was 205 Hz. IV. CONCLUSION This study demonstrates that a low-frequency dc-ac power

  20. Controlled Tripping of Overheated Lines Mitigates Power Outages

    E-Print Network [OSTI]

    Pfitzner, René; Chertkov, Michael

    2011-01-01T23:59:59.000Z

    We study cascades of blackouts in the model of the Polish (transmission) power grid (2700 nodes and 3504 transmission lines). A cascade is initiated by a sufficiently severe initial contingency tripping. The cascade advances via sequential tripping of many more overheated lines (with the thermal limits exceeded), islanding loads and generators and eventually arriving at a fixed point with the surviving part of the system being power- flow-balanced and the rest of the system being outaged. Utilizing the quasi-static model for cascade propagation, introduced in our earlier study (Statistical Classification of Cascading Failures in Power Grids, IEEE PES GM 2011), we analyze how the severity of the cascade depends on the order of tripping overheated lines. Our main observation is that the order of tripping has a tremendous effect on the size of the resulting outage: the probability distribution function of the outage size is broad; moreover in many of the cases studied, picking an overheated line at random result...

  1. Survey of tools for risk assessment of cascading outages

    SciTech Connect (OSTI)

    Papic, Milorad; Bell, Keith; Chen, Yousu; Dobson, Ian; Fonte, Louis; Haq, Enamul; Hines, Paul; Kirschen, Daniel; Luo, Xiaochuan; Miller, Stephen; Samaan, Nader A.; Vaiman, Marianna; Varghese, Matthew; Zhang, Pei

    2011-10-01T23:59:59.000Z

    Abstract-This paper is a result of ongoing activity carried out by Understanding, Prediction, Mitigation and Restoration of Cascading Failures Task Force under IEEE Computer Analytical Methods Subcommittee (CAMS). The task force's previous papers [1, 2] are focused on general aspects of cascading outages such as understanding, prediction, prevention and restoration from cascading failures. This is the second of two new papers, which extend this previous work to summarize the state of the art in cascading failure risk analysis methodologies and modeling tools. The first paper reviews the state of the art in methodologies for performing risk assessment of potential cascading outages [3]. This paper describes the state of the art in cascading failure modeling tools, documenting the view of experts representing utilities, universities and consulting companies. The paper is intended to constitute a valid source of information and references about presently available tools that deal with prediction of cascading failure events. This effort involves reviewing published literature and other documentation from vendors, universities and research institutions. The assessment of cascading outages risk evaluation is in continuous evolution. Investigations to gain even better understanding and identification of cascading events are the subject of several research programs underway aimed at solving the complexity of these events that electrical utilities face today. Assessing the risk of cascading failure events in planning and operation for power transmission systems require adequate mathematical tools/software.

  2. FLATNESS BASED CONTROL OF A BUCK-CONVERTER DRIVEN DC MOTOR

    E-Print Network [OSTI]

    Knobloch,Jürgen

    FLATNESS BASED CONTROL OF A BUCK-CONVERTER DRIVEN DC MOTOR Felix Antritter ,1 Peter Maurer Johann on the circuit and control design of a buck converter driven DC motor. The steps of design, as for example objective: tracking control of the DC motor's shaft angular velocity. The dynamic system composed from

  3. Demultiplexer circuit for neural stimulation

    DOE Patents [OSTI]

    Wessendorf, Kurt O; Okandan, Murat; Pearson, Sean

    2012-10-09T23:59:59.000Z

    A demultiplexer circuit is disclosed which can be used with a conventional neural stimulator to extend the number of electrodes which can be activated. The demultiplexer circuit, which is formed on a semiconductor substrate containing a power supply that provides all the dc electrical power for operation of the circuit, includes digital latches that receive and store addressing information from the neural stimulator one bit at a time. This addressing information is used to program one or more 1:2.sup.N demultiplexers in the demultiplexer circuit which then route neural stimulation signals from the neural stimulator to an electrode array which is connected to the outputs of the 1:2.sup.N demultiplexer. The demultiplexer circuit allows the number of individual electrodes in the electrode array to be increased by a factor of 2.sup.N with N generally being in a range of 2-4.

  4. Draft!07"18"2011! 1 Turning the Tide on Outages1

    E-Print Network [OSTI]

    Amin, S. Massoud

    !programs!of!replacement,!rehabilitation!and!new!investment!in!the! U.S.!infrastructure.! ! Focusing!on!the!electric!power!sector,!the!power!outages!whether!the!carrying!capacity!or!safety!margin!will!exist! to!support!anticipated!demand!is!in!question.! ! To!assess!impacts!using!actual!electric!power!outage! Draft!07"18"2011! 1 Turning the Tide on Outages1 What are the true costs of implementing

  5. U.S. - Canada Power System Outage Task Force: Final Report on...

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

    Connecticut and New Jersey, and the Canadian province of Ontario. U.S. - Canada Power System Outage Task Force: Final Report on the Implementation of Task Force...

  6. Homeowners: Respond to Power Outages | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdfBreaking of Blythe Solar PowerCommercialEnergy Star HomePower Outages Homeowners:

  7. Number and propagation of line outages in cascading events in electric power transmission systems

    E-Print Network [OSTI]

    Dobson, Ian

    Number and propagation of line outages in cascading events in electric power transmission systems that progressively weakens the system. Large electric power transmission systems occasionally have cascading failures of transmission lines. The multiple mechanisms involved these cascading outages are many and varied, and the power

  8. An Efficient Energy Curtailment Scheme For Outage Management in Smart Grid

    E-Print Network [OSTI]

    Durrani, Salman

    as to minimize the total cost incurred to the system due to the power outage (i.e., social optimality). The game that a smart grid will transform the current power grid into one that functions more intelligently, giving J challenges for reliable smart grid operation is the post-outage management of power among the users

  9. POWER SYSTEM LINE OUTAGE DETECTION AND IDENTIFICATION --A QUICKEST CHANGE DETECTION APPROACH

    E-Print Network [OSTI]

    Liberzon, Daniel

    POWER SYSTEM LINE OUTAGE DETECTION AND IDENTIFICATION -- A QUICKEST CHANGE DETECTION APPROACH Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign ABSTRACT A method to detect and isolate power system transmission line outages in near real-time is proposed

  10. IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 62, NO. 2, FEBRUARY 2014 699 Outage Probability in

    E-Print Network [OSTI]

    Zhou, Xiangyun "Sean"

    transform of a cumulative distribution and (ii) a reference link power gain-based framework which exploits the distribution of the fading power gain between the reference transmitter and receiver. The outage probability the outage probability at any location inside either a disk or polygon region. The analysis illustrates

  11. Tritium Reduction and Control in the Vacuum Vessel During TFTR Outage and Decommissioning *

    E-Print Network [OSTI]

    Tritium Reduction and Control in the Vacuum Vessel During TFTR Outage and Decommissioning * W of the torus, a three tier system was developed for the outage in order to reduce and control the free tritium. The first phase of the program to reduce the free tritium consisted of direct flowthrough of room air

  12. Tritium Reduction and Control in the Vacuum Vessel During TFTR Outage and Decommissioning*

    E-Print Network [OSTI]

    Tritium Reduction and Control in the Vacuum Vessel During TFTR Outage and Decommissioning* W, a three tier system was developed for the outage in order to reduce and control the free tritium. The first phase of the program to reduce the free tritium consisted of direct flowthrough of room air

  13. Annual Steam System Maintenance Outage (2014) Beginning on Sunday, June 8th

    E-Print Network [OSTI]

    Firestone, Jeremy

    Annual Steam System Maintenance Outage (2014) Beginning on Sunday, June 8th at 12:00pm (Noon), the Central Utility Plant (CUP), which supplies steam service to over 100 buildings on the Newark campus, will be shut down for the annual Steam System Maintenance Outage. This effort is necessary each year to ensure

  14. Multiphase soft switched DC/DC converter and active control technique for fuel cell ripple current elimination

    DOE Patents [OSTI]

    Lai, Jih-Sheng (Blacksburg, VA); Liu, Changrong (Sunnyvale, CA); Ridenour, Amy (Salem, VA)

    2009-04-14T23:59:59.000Z

    DC/DC converter has a transformer having primary coils connected to an input side and secondary coils connected to an output side. Each primary coil connects a full-bridge circuit comprising two switches on two legs, the primary coil being connected between the switches on each leg, each full-bridge circuit being connected in parallel wherein each leg is disposed parallel to one another, and the secondary coils connected to a rectifying circuit. An outer loop control circuit that reduces ripple in a voltage reference has a first resistor connected in series with a second resistor connected in series with a first capacitor which are connected in parallel with a second capacitor. An inner loop control circuit that reduces ripple in a current reference has a third resistor connected in series with a fourth resistor connected in series with a third capacitor which are connected in parallel with a fourth capacitor.

  15. Further Notice of 230kV Circuit Planned Outages | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't YourTransport inEnergy0.pdfTechnologies ProgramOutfittedof6 * September 2005Further Notice

  16. Docket No. EO-05-01: Further Notice of 230kV Circuit Planned Outages |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny:Revised Finding of No53197E T ADRAFTJanuary 2004April 2015 <Department of

  17. Docket No. EO-05-01: Further Notice of 230kV Circuit Planned Outages |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015 Business42.1Energy | DepartmenttheFebruary 13, 2013 meeting

  18. High frequency AC power converter for low voltage circuits

    E-Print Network [OSTI]

    Salazar, Nathaniel Jay Tobias

    2012-01-01T23:59:59.000Z

    This thesis presents a novel AC power delivery architecture that is suitable for VHF frequency (50-100MHz) polyphase AC/DC power conversion in low voltage integrated circuits. A complete AC power delivery architecture was ...

  19. 92 IEEE POWER ELECTRONICS LETTERS, VOL. 2, NO. 3, SEPTEMBER 2004 A Lossless Active Clamping Circuit

    E-Print Network [OSTI]

    Lehman, Brad

    . On the secondary side, when the rectifier diodes enter reverse recovery, the current flowing in the secondary lossless clamping circuit on the secondary side for dc-dc converters with a current-dou- bler structure. This circuit reduces ringing on secondary-side recti- fiers due to leakage inductance. The ringing loss

  20. Delta connected resonant snubber circuit

    DOE Patents [OSTI]

    Lai, J.S.; Peng, F.Z.; Young, R.W. Sr.; Ott, G.W. Jr.

    1998-01-20T23:59:59.000Z

    A delta connected, resonant snubber-based, soft switching, inverter circuit achieves lossless switching during dc-to-ac power conversion and power conditioning with minimum component count and size. Current is supplied to the resonant snubber branches solely by the dc supply voltage through the main inverter switches and the auxiliary switches. Component count and size are reduced by use of a single semiconductor switch in the resonant snubber branches. Component count is also reduced by maximizing the use of stray capacitances of the main switches as parallel resonant capacitors. Resonance charging and discharging of the parallel capacitances allows lossless, zero voltage switching. In one embodiment, circuit component size and count are minimized while achieving lossless, zero voltage switching within a three-phase inverter. 36 figs.

  1. Delta connected resonant snubber circuit

    DOE Patents [OSTI]

    Lai, Jih-Sheng (Knoxville, TN); Peng, Fang Zheng (Oak Ridge, TN); Young, Sr., Robert W. (Oak Ridge, TN); Ott, Jr., George W. (Knoxville, TN)

    1998-01-01T23:59:59.000Z

    A delta connected, resonant snubber-based, soft switching, inverter circuit achieves lossless switching during dc-to-ac power conversion and power conditioning with minimum component count and size. Current is supplied to the resonant snubber branches solely by the dc supply voltage through the main inverter switches and the auxiliary switches. Component count and size are reduced by use of a single semiconductor switch in the resonant snubber branches. Component count is also reduced by maximizing the use of stray capacitances of the main switches as parallel resonant capacitors. Resonance charging and discharging of the parallel capacitances allows lossless, zero voltage switching. In one embodiment, circuit component size and count are minimized while achieving lossless, zero voltage switching within a three-phase inverter.

  2. Time domain analog circuit simulation J.G. Fijnvandraat

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    of circuits in the electronics industry. Keywords: transient analysis, modified nodal analysis, differential be applied such as DC or steady­state anal­ ysis, Transient Analysis, AC­analysis (linear frequency domain analysis, after linearization around a DC­solution), Noise Analysis, Harmonic Balance (non­linear frequency

  3. Time domain analog circuit simulation J.G. Fijnvandraat

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    of circuits in the electronics industry. Keywords: transient analysis, modified nodal analysis, differential be applied such as DC or steady-state anal- ysis, Transient Analysis, AC-analysis (linear frequency domain analysis, after linearization around a DC-solution), Noise Analysis, Harmonic Balance (non-linear frequency

  4. Electrochemically controlled charging circuit for storage batteries

    DOE Patents [OSTI]

    Onstott, E.I.

    1980-06-24T23:59:59.000Z

    An electrochemically controlled charging circuit for charging storage batteries is disclosed. The embodiments disclosed utilize dc amplification of battery control current to minimize total energy expended for charging storage batteries to a preset voltage level. The circuits allow for selection of Zener diodes having a wide range of reference voltage levels. Also, the preset voltage level to which the storage batteries are charged can be varied over a wide range.

  5. DC source assemblies

    DOE Patents [OSTI]

    Campbell, Jeremy B; Newson, Steve

    2013-02-26T23:59:59.000Z

    Embodiments of DC source assemblies of power inverter systems of the type suitable for deployment in a vehicle having an electrically grounded chassis are provided. An embodiment of a DC source assembly comprises a housing, a DC source disposed within the housing, a first terminal, and a second terminal. The DC source also comprises a first capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the first terminal. The DC source assembly further comprises a second capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the second terminal.

  6. Analysis of a transformer-less, multi-level DC-DC converter for HVDC operation

    SciTech Connect (OSTI)

    Karady, G.G.; Devarajan, S. [Arizona State Univ., Tempe, AZ (United States)

    1998-12-31T23:59:59.000Z

    HVDC systems require DC step up and DC step down units. The traditional approach is the application of twelve-pulse thyristor bridges with transformers. The developments of fast switching IGBT devices permit the development of transformer-less, multi-level converters. A multi-level circuit was suggested by Limpaecher. This paper presents a detailed simulation of the proposed circuit together with the analysis of its performance. The converter consists of a set of capacitors, air core inductors and solid state switches arranged in a ladder network. In the step-up mode, the closing of solid state switches resonantly charges the capacitors in parallel through an air-cored inductor. Then solid state switches resonantly charges the capacitors in parallel through an air-cored inductor. Then solid state switches connect the capacitors in series and discharge them through an air-core inductor to the load. In the step-down mode the capacitors are charged in series and discharged in parallel. The circuit has three modes of operation in each cycle: charge, inversion, and discharge. The circuit operation is analyzed in each mode using SPICE simulations. The selection of the components is discussed and output voltage regulation is analyzed. The results show that the proposed circuit promises significant reduction of losses, because of the zero current switching. The investment cost is reduced because of the elimination of transformers.

  7. Fast Detection and Mitigation of Cascading Outages in the Power System

    E-Print Network [OSTI]

    Pang, Chengzong

    2012-02-14T23:59:59.000Z

    This dissertation studies the causes and mechanism of power system cascading outages and proposes the improved interactive scheme between system-wide and local levels of monitoring and control to quickly detect, classify and mitigate the cascading...

  8. Power electronic interface circuits for batteries and ultracapacitors in electric vehicles and battery storage systems

    DOE Patents [OSTI]

    King, Robert Dean (Schenectady, NY); DeDoncker, Rik Wivina Anna Adelson (Malvern, PA)

    1998-01-01T23:59:59.000Z

    A method and apparatus for load leveling of a battery in an electrical power system includes a power regulator coupled to transfer power between a load and a DC link, a battery coupled to the DC link through a first DC-to-DC converter and an auxiliary passive energy storage device coupled to the DC link through a second DC-to-DC converter. The battery is coupled to the passive energy storage device through a unidirectional conducting device whereby the battery can supply power to the DC link through each of the first and second converters when battery voltage exceeds voltage on the passive storage device. When the load comprises a motor capable of operating in a regenerative mode, the converters are adapted for transferring power to the battery and passive storage device. In this form, resistance can be coupled in circuit with the second DC-to-DC converter to dissipate excess regenerative power.

  9. Power electronic interface circuits for batteries and ultracapacitors in electric vehicles and battery storage systems

    DOE Patents [OSTI]

    King, R.D.; DeDoncker, R.W.A.A.

    1998-01-20T23:59:59.000Z

    A method and apparatus for load leveling of a battery in an electrical power system includes a power regulator coupled to transfer power between a load and a DC link, a battery coupled to the DC link through a first DC-to-DC converter and an auxiliary passive energy storage device coupled to the DC link through a second DC-to-DC converter. The battery is coupled to the passive energy storage device through a unidirectional conducting device whereby the battery can supply power to the DC link through each of the first and second converters when battery voltage exceeds voltage on the passive storage device. When the load comprises a motor capable of operating in a regenerative mode, the converters are adapted for transferring power to the battery and passive storage device. In this form, resistance can be coupled in circuit with the second DC-to-DC converter to dissipate excess regenerative power. 8 figs.

  10. Building Scale DC Microgrids

    E-Print Network [OSTI]

    Marnay, Chris

    2013-01-01T23:59:59.000Z

    resources, a 10 kW vertical axis wind turbine, and Fig. 4AC-grid Fig. 3. Vertical axis wind turbine in the AIT DC µ

  11. Building Scale DC Microgrids

    E-Print Network [OSTI]

    Marnay, Chris

    2014-01-01T23:59:59.000Z

    resources, a 10 kW vertical axis wind turbine, and Fig. 4the µgrid Fig. 3. Vertical axis wind turbine in the AIT DC µ

  12. Cell modulated DC/DC converter

    E-Print Network [OSTI]

    Warren, James Raymond, III

    2005-01-01T23:59:59.000Z

    A very high frequency converter roughly based on a class E topology is investigated for replacing a conventional boost converter circuit. The loss mechanisms in class E inverters are characterized, and metrics are developed ...

  13. High Voltage DC Transmission 2 1.0 Introduction

    E-Print Network [OSTI]

    McCalley, James D.

    1 High Voltage DC Transmission 2 1.0 Introduction Interconnecting HVDC within an AC system requires on use of switching devices collectively referred to in the HVDC community as valves. Valves may be non. Fig. 1 There have been three types of devices for implementing HVDC converter circuits: mercury

  14. Multilevel DC link inverter

    DOE Patents [OSTI]

    Su, Gui-Jia

    2003-06-10T23:59:59.000Z

    A multilevel DC link inverter and method for improving torque response and current regulation in permanent magnet motors and switched reluctance motors having a low inductance includes a plurality of voltage controlled cells connected in series for applying a resulting dc voltage comprised of one or more incremental dc voltages. The cells are provided with switches for increasing the resulting applied dc voltage as speed and back EMF increase, while limiting the voltage that is applied to the commutation switches to perform PWM or dc voltage stepping functions, so as to limit current ripple in the stator windings below an acceptable level, typically 5%. Several embodiments are disclosed including inverters using IGBT's, inverters using thyristors. All of the inverters are operable in both motoring and regenerating modes.

  15. OTRA-THS MAC to reduce Power Outage Data Collection Latency in a smart meter network

    SciTech Connect (OSTI)

    Garlapati, Shravan K [ORNL] [ORNL; Kuruganti, Phani Teja [ORNL] [ORNL; Buehrer, Richard M [ORNL] [ORNL; Reed, Jeffrey H [ORNL] [ORNL

    2014-01-01T23:59:59.000Z

    The deployment of advanced metering infrastructure by the electric utilities poses unique communication challenges, particularly as the number of meters per aggregator increases. During a power outage, a smart meter tries to report it instantaneously to the electric utility. In a densely populated residential/industrial locality, it is possible that a large number of smart meters simultaneously try to get access to the communication network to report the power outage. If the number of smart meters is very high of the order of tens of thousands (metropolitan areas), the power outage data flooding can lead to Random Access CHannel (RACH) congestion. Several utilities are considering the use of cellular network for smart meter communications. In 3G/4G cellular networks, RACH congestion not only leads to collisions, retransmissions and increased RACH delays, but also has the potential to disrupt the dedicated traffic flow by increasing the interference levels (3G CDMA). In order to overcome this problem, in this paper we propose a Time Hierarchical Scheme (THS) that reduces the intensity of power outage data flooding and power outage reporting delay by 6/7th, and 17/18th when compared to their respective values without THS. Also, we propose an Optimum Transmission Rate Adaptive (OTRA) MAC to optimize the latency in power outage data collection. The analysis and simulation results presented in this paper show that both the OTRA and THS features of the proposed MAC results in a Power Outage Data Collection Latency (PODCL) that is 1/10th of the 4G LTE PODCL.

  16. Status Report on the Development of Micro-Scheduling Software for the Advanced Outage Control Center Project

    SciTech Connect (OSTI)

    Shawn St. Germain; Kenneth Thomas; Ronald Farris; Jeffrey Joe

    2014-09-01T23:59:59.000Z

    The long-term viability of existing nuclear power plants (NPPs) in the United States (U.S.) is dependent upon a number of factors, including maintaining high capacity factors, maintaining nuclear safety, and reducing operating costs, particularly those associated with refueling outages. Refueling outages typically take 20-30 days, and for existing light water NPPs in the U.S., the reactor cannot be in operation during the outage. Furthermore, given that many NPPs generate between $1-1.5 million/day in revenue when in operation, there is considerable interest in shortening the length of refueling outages. Yet, refueling outages are highly complex operations, involving multiple concurrent and dependent activities that are difficult to coordinate. Finding ways to improve refueling outage performance while maintaining nuclear safety has proven to be difficult. The Advanced Outage Control Center project is a research and development (R&D) demonstration activity under the Light Water Reactor Sustainability (LWRS) Program. LWRS is a R&D program which works with industry R&D programs to establish technical foundations for the licensing and managing of long-term, safe, and economical operation of current NPPs. The Advanced Outage Control Center project has the goal of improving the management of commercial NPP refueling outages. To accomplish this goal, this INL R&D project is developing an advanced outage control center (OCC) that is specifically designed to maximize the usefulness of communication and collaboration technologies for outage coordination and problem resolution activities. This report describes specific recent efforts to develop a capability called outage Micro-Scheduling. Micro-Scheduling is the ability to allocate and schedule outage support task resources on a sub-hour basis. Micro-Scheduling is the real-time fine-tuning of the outage schedule to react to the actual progress of the primary outage activities to ensure that support task resources are optimally deployed with the least amount of delay and unproductive use of resources. The remaining sections of this report describe in more detail the scheduling challenges that occur during outages, how a Micro-Scheduling capability helps address those challenges, and provides a status update on work accomplished to date and the path forward.

  17. Simulating Threshold Circuits by Majority Circuits \\Lambda

    E-Print Network [OSTI]

    Karpinski, Marek

    Simulating Threshold Circuits by Majority Circuits \\Lambda Mikael Goldmann y Numerical Analysis, and Kailath proved super­linear lower bounds on the number of wires in constant­depth majority circuits­size depth 2 majority circuit. In general we show that a polynomial­size, depth­ d threshold circuit can

  18. Halbach array DC motor/generator

    DOE Patents [OSTI]

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

    1998-01-01T23:59:59.000Z

    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.

  19. Halbach array DC motor/generator

    DOE Patents [OSTI]

    Merritt, B.T.; Dreifuerst, G.R.; Post, R.F.

    1998-01-06T23:59:59.000Z

    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. 17 figs.

  20. High speed, long distance, data transmission multiplexing circuit

    DOE Patents [OSTI]

    Mariotti, Razvan (Boulder, CO)

    1991-01-01T23:59:59.000Z

    A high speed serial data transmission multiplexing circuit, which is operable to accurately transmit data over long distances (up to 3 Km), and to multiplex, select and continuously display real time analog signals in a bandwidth from DC to 100 Khz. The circuit is made fault tolerant by use of a programmable flywheel algorithm, which enables the circuit to tolerate one transmission error before losing synchronization of the transmitted frames of data. A method of encoding and framing captured and transmitted data is used which has a low overhead and prevents some particular transmitted data patterns from locking an included detector/decoder circuit.

  1. Coordinated Beamforming for Multiuser MISO Interference Channel under Rate Outage Constraints

    E-Print Network [OSTI]

    Li, Wei-Chiang; Lin, Che; Chi, Chong-Yung

    2011-01-01T23:59:59.000Z

    This paper studies the coordinated beamforming design problem for the multiple-input single-output (MISO) interference channel, assuming only channel distribution information (CDI) at the transmitters. For a given requirement on the rate outage probability for receivers, we aim to maximize the system utility (e.g., the weighted sum rate, weighted proportional fairness rate, and the weighed harmonic mean rate) subject to the rate outage constraints and individual power constraints. The outage constraints, however, lead to a complicated, nonconvex structure for the considered beamforming design problem and make the optimization problem difficult to handle. While this nonconvex optimization problem can be solved in an exhaustive search manner, this brute-force approach is only feasible when the number of transmitter-receiver pairs is small. For a system with a large number of transmitter-receiver pairs, computationally efficient alternatives are necessary. The focus of this paper is hence on the design of such e...

  2. Outage Constrained Robust Transmit Optimization for Multiuser MISO Downlinks: Tractable Approximations by Conic Optimization

    E-Print Network [OSTI]

    Wang, Kun-Yu; Chang, Tsung-Hui; Ma, Wing-Kin; Chi, Chong-Yung

    2011-01-01T23:59:59.000Z

    In this paper we consider a probabilistic signal-to-interference and-noise ratio (SINR) constrained problem for transmit beamforming design in the presence of imperfect channel state information (CSI), under a multiuser multiple-input single-output (MISO) downlink scenario. In particular, we deal with outage-based quality-of-service constraints, where the probability of each user's SINR not satisfying a service requirement must not fall below a given outage probability specification. The study of solution approaches to the probabilistic SINR constrained problem is important because CSI errors are often present in practical systems and they may cause substantial SINR outages if not handled properly. However, a major technical challenge is how to process the probabilistic SINR constraints. To tackle this, we propose a novel relaxation- restriction (RAR) approach, which consists of two key ingredients-semidefinite relaxation (SDR), and analytic tools for conservatively approximating probabilistic constraints. Th...

  3. Ionization tube simmer current circuit

    DOE Patents [OSTI]

    Steinkraus, Jr., Robert F. (Livermore, CA)

    1994-01-01T23:59:59.000Z

    A highly efficient flash lamp simmer current circuit utilizes a fifty percent duty cycle square wave pulse generator to pass a current over a current limiting inductor to a full wave rectifier. The DC output of the rectifier is then passed over a voltage smoothing capacitor through a reverse current blocking diode to a flash lamp tube to sustain ionization in the tube between discharges via a small simmer current. An alternate embodiment of the circuit combines the pulse generator and inductor in the form of an FET off line square wave generator with an impedance limited step up output transformer which is then applied to the full wave rectifier as before to yield a similar simmer current.

  4. Ionization tube simmer current circuit

    DOE Patents [OSTI]

    Steinkraus, R.F. Jr.

    1994-12-13T23:59:59.000Z

    A highly efficient flash lamp simmer current circuit utilizes a fifty percent duty cycle square wave pulse generator to pass a current over a current limiting inductor to a full wave rectifier. The DC output of the rectifier is then passed over a voltage smoothing capacitor through a reverse current blocking diode to a flash lamp tube to sustain ionization in the tube between discharges via a small simmer current. An alternate embodiment of the circuit combines the pulse generator and inductor in the form of an FET off line square wave generator with an impedance limited step up output transformer which is then applied to the full wave rectifier as before to yield a similar simmer current. 6 figures.

  5. Policy on Building use during Ventilation Outage: School of Science Roger Bacon Hall and Morrell Science Center

    E-Print Network [OSTI]

    Policy on Building use during Ventilation Outage: School of Science Roger Bacon Hall and Morrell) are present. For this reason, the School of Science has a special policy for times when building ventilation is not functioning as designed. A common cause of inadequate building ventilation is a power outage. Laboratory

  6. Nuclear Safety Risk Management in Refueling Outage of Qinshan Nuclear Power Plant

    SciTech Connect (OSTI)

    Meijing Wu; Guozhang Shen [Qinshan Nuclear power company (China)

    2006-07-01T23:59:59.000Z

    The NPP is used to planning maintenance, in-service inspection, surveillance test, fuel handling and design modification in the refueling outage; the operator response capability will be reduced plus some of the plant systems out of service or loss of power at this time. Based on 8 times refueling outage experiences of the Qinshan NPP, this article provide some good practice and lesson learned for the nuclear safety risk management focus at four safety function areas of Residual Heat Removal Capability, Inventory Control, Power availability and Reactivity control. (authors)

  7. Circuit breaker monitoring application using wireless communication

    E-Print Network [OSTI]

    Ved, Nitin

    2007-04-25T23:59:59.000Z

    synchronizes recorded data to a global time standard enabling system-wide applications to use the recorded data. ? Ease of installation: The circuit breaker monitoring system can be installed at a substation within minutes by one or two personnel. The system... is powered by a 130V DC source, usually a battery in the substation control house, called the supply volt- age. All elements of the circuit are connected between the positive and the negative terminals of the supply voltage.Another voltage source called...

  8. MonteCarlo and Analytical Methods for Forced Outage Rate Calculations of Peaking Units 

    E-Print Network [OSTI]

    Rondla, Preethi 1988-

    2012-10-26T23:59:59.000Z

    pessimistic results owing to its time spent in the reserve shut down state. Therefore the normal two state representation of a generating unit is not adequate. A four state model was proposed by an IEEE committee to calculate the forced outage rate...

  9. The detection, prevention and mitigation of cascading outages in the power system 

    E-Print Network [OSTI]

    Song, Hongbiao

    2009-05-15T23:59:59.000Z

    all the time, and takes actions when needed to help detect, prevent and mitigate the possible cascading outage. Comprehensive simulation studies have been implemented using the IEEE 14- bus, 24-bus, 39-bus and 118-bus systems and promising results show...

  10. Joint Power Control and Beamforming Codebook Design for MISO Channels under the Outage

    E-Print Network [OSTI]

    Yu, Wei

    Joint Power Control and Beamforming Codebook Design for MISO Channels under the Outage Criterion and beamforming codebooks for limited-feedback multiple-input single-output (MISO) wireless systems. The problem focuses on optimal design of single-user limited-feedback systems over multiple-input single-output (MISO

  11. Outage Probability of MISO Broadcast Systems with Noisy Channel Side Information

    E-Print Network [OSTI]

    Lim, Teng Joon

    Outage Probability of MISO Broadcast Systems with Noisy Channel Side Information Alon Shalev output (MISO) systems. However, these schemes generally require perfect channel information) of a linear zero forcing transmitter, operating in a fading MISO broadcast channel. We consider a rectangular

  12. Asymptotic Outage Performance of Power Allocation in Block-Fading Channels

    E-Print Network [OSTI]

    Guillén i Fàbregas, Albert

    .nguyen@postgrads.unisa.edu.au Albert Guill´en i F`abregas Department of Engineering University of Cambridge Cambridge CB2 1PZ, UK guillen@ieee.org Lars K. Rasmussen Institute for Telecommunications Research University of South Australia SA 5095, Australia lars.rasmussen@unisa.edu.au Abstract-- We characterize the asymptotic outage

  13. 96 IEEE power & energy magazine march/april 2005 THE MASSIVE POWER OUTAGE OF

    E-Print Network [OSTI]

    Amin, S. Massoud

    --settle for a substan- dard electricity infrastructure. We absolutely can meet the needs of a pervasively digital valued at US$358 billion. The electric power grid was historically operated by separate utilities; each96 IEEE power & energy magazine march/april 2005 T THE MASSIVE POWER OUTAGE OF August 2003

  14. Environmental determinants of unscheduled residential outages in the electrical power distribution of Phoenix, Arizona

    E-Print Network [OSTI]

    service. The reliability of electrical power is important because many other infrastructures are directly of the electric power distribution infrastructure. There are many studies on the vulnerability of infrastructuresEnvironmental determinants of unscheduled residential outages in the electrical power distribution

  15. Outage Detection in Power Distribution Networks with Optimally-Deployed Power Flow Sensors

    E-Print Network [OSTI]

    Zhao, Yue

    Outage Detection in Power Distribution Networks with Optimally-Deployed Power Flow Sensors Yue Zhao deployed real-time power flow sensors and that of load estimates via Advanced Metering Infrastructure (AMI of Naval Research, under Grant N00014-12-1-0767. where supervisory control and data acquisition (SCADA

  16. Power Line Damage, Electrical Outages Reduced in the ''Sleet Belt'': NICE3 Steel Project Fact Sheet

    SciTech Connect (OSTI)

    NONE

    2000-04-25T23:59:59.000Z

    The AR Windamper System was developed through a grant from the Inventions and Innovation Program, to protect power transmission lines in sleet belt states and provinces by eliminating the ''galloping'' phenomenon. Wind damping products minimize power outages and reduce repair costs to transmission lines.

  17. Outage Analysis of Multi-node Amplify-and-Forward Relay Networks

    E-Print Network [OSTI]

    Liu, K. J. Ray

    Outage Analysis of Multi-node Amplify-and-Forward Relay Networks Karim G. Seddik, Ahmed K. Sadek, Weifeng Su , and K. J. Ray Liu Department of Electrical and Computer Engineering, and Institute}@eng.umd.edu Department of Electrical Engineering, State University of New York (SUNY) at Buffalo, Buffalo, NY 14260, USA

  18. Outage Performance of a Multiuser Distributed Antenna System in Underwater Acoustic Channels

    E-Print Network [OSTI]

    Wang, Zhengdao

    1 Outage Performance of a Multiuser Distributed Antenna System in Underwater Acoustic Channels Zhaohui Wang, Shengli Zhou, Zhengdao Wang, Josko Catipovic§ and Peter Willett Dept. of Electrical and Computer Engineering, University of Connecticut, Storrs, CT 06269, USA Dept. of Electrical and Computer

  19. Cut-off Rate based Outage Probability Analysis of Frequency Hopping Mobile Radio under Jamming

    E-Print Network [OSTI]

    Yýlmaz, Özgür

    Cut-off Rate based Outage Probability Analysis of Frequency Hopping Mobile Radio under Jamming Conditions G¨okhan M. G¨uvensen Electrical and Electronics Eng. Dept. Middle East Technical University Ankara, Turkey Email: guvensen@metu.edu.tr Yalc¸in Tanik Electrical and Electronics Eng. Dept. Middle East

  20. The Information-Outage Probability of Finite-Length Codes over AWGN Channels

    E-Print Network [OSTI]

    Valenti, Matthew C.

    The Information-Outage Probability of Finite-Length Codes over AWGN Channels David Buckingham and Matthew C. Valenti Lane Department of Computer Science and Electrical Engineering West Virginia University March 19, 2008 Buckingham and Valenti ( Lane Department of Computer Science and Electrical Engineering

  1. Asymptotic Outage Analysis of General Motion-Invariant Ad Hoc Networks

    E-Print Network [OSTI]

    Haenggi, Martin

    Asymptotic Outage Analysis of General Motion-Invariant Ad Hoc Networks Riccardo Giacomelli Dept Krishna Ganti Dept. of Electrical and Computer Eng. University of Texas at Austin Austin, TX, USA E-mail: rganti@austin.utexas.edu Martin Haenggi Dept. of Electrical Engineering University of Notre Dame Notre

  2. The Approximation of Outage Probability and the Trade-off between Capacity and Diversity for the

    E-Print Network [OSTI]

    Scharf, Louis

    The Approximation of Outage Probability and the Trade-off between Capacity and Diversity for the Frequency-Selective Channel Zhifei Fan Department of Electrical and Computer Engineering Colorado State University Fort Collins, CO 80523 Email: fanz@engr.colostate.edu Louis Scharf Department of Electrical

  3. Optimal Power Control in CDMA Networks with Constraints on Outage Probability

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    power control al- gorithm is developed for large systems of users. Simulation results are presented of this previous work deals with invariant channel models. Any power control scheme that attempts to follow fastOptimal Power Control in CDMA Networks with Constraints on Outage Probability John Papandriopoulos

  4. Prediction-Based Recovery from Link Outages in On-Board Mobile Communication Networks

    E-Print Network [OSTI]

    Libman, Lavy

    , such as those pro- posed for (and employed in) public transport vehicles, users are connected to a local network transport routes, and their repetitive nature, allows a certain degree of prediction of impending link extension known as Freeze-TCP, we study how the performance of the protocol depends on the outage prediction

  5. Low Insertion HVDC Circuit Breaker: Magnetically Pulsed Hybrid Breaker for HVDC Power Distribution Protection

    SciTech Connect (OSTI)

    None

    2012-01-09T23:59:59.000Z

    GENI Project: General Atomics is developing a direct current (DC) circuit breaker that could protect the grid from faults 100 times faster than its alternating current (AC) counterparts. Circuit breakers are critical elements in any electrical system. At the grid level, their main function is to isolate parts of the grid where a fault has occurred—such as a downed power line or a transformer explosion—from the rest of the system. DC circuit breakers must interrupt the system during a fault much faster than AC circuit breakers to prevent possible damage to cables, converters and other grid-level components. General Atomics’ high-voltage DC circuit breaker would react in less than 1/1,000th of a second to interrupt current during a fault, preventing potential hazards to people and equipment.

  6. A global maximum power point tracking DC-DC converter

    E-Print Network [OSTI]

    Duncan, Joseph, 1981-

    2005-01-01T23:59:59.000Z

    This thesis describes the design, and validation of a maximum power point tracking DC-DC converter capable of following the true global maximum power point in the presence of other local maximum. It does this without the ...

  7. DC arc weld starter

    DOE Patents [OSTI]

    Campiotti, Richard H. (Tracy, CA); Hopwood, James E. (Oakley, CA)

    1990-01-01T23:59:59.000Z

    A system for starting an arc for welding uses three DC power supplies, a high voltage supply for initiating the arc, an intermediate voltage supply for sustaining the arc, and a low voltage welding supply directly connected across the gap after the high voltage supply is disconnected.

  8. Effects of stray DC currents on the performance of large core type transformers

    SciTech Connect (OSTI)

    Christini, J.M.; Girgis, R.S. (ABB Power and Company, Inc., Muncie, IN (US))

    1992-01-01T23:59:59.000Z

    This paper presents the results of a study made on the effects of stray DC current on power transformer performance. A circuit model was developed to analyze the magnetic behavior of three-phase five-leg core type transformers. The magnetic field distribution was obtained for several different operating conditions by taking into account core geometry, core design, magnitude of D.C. current, and magnitude of A.C. voltage. The change in transformer performance is discussed.

  9. High voltage dc--dc converter with dynamic voltage regulation and decoupling during load-generated arcs

    DOE Patents [OSTI]

    Shimer, D.W.; Lange, A.C.

    1995-05-23T23:59:59.000Z

    A high-power power supply produces a controllable, constant high voltage output under varying and arcing loads. The power supply includes a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, an output rectifier for producing a dc voltage at the output of each module, and a current sensor for sensing output current. The power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle and circuitry is provided for sensing incipient arc currents at the output of the power supply to simultaneously decouple the power supply circuitry from the arcing load. The power supply includes a plurality of discrete switching type dc--dc converter modules. 5 Figs.

  10. High voltage dc-dc converter with dynamic voltage regulation and decoupling during load-generated arcs

    DOE Patents [OSTI]

    Shimer, Daniel W. (Danville, CA); Lange, Arnold C. (Livermore, CA)

    1995-01-01T23:59:59.000Z

    A high-power power supply produces a controllable, constant high voltage output under varying and arcing loads. The power supply includes a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, an output rectifier for producing a dc voltage at the output of each module, and a current sensor for sensing output current. The power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle and circuitry is provided for sensing incipient arc currents at the output of the power supply to simultaneously decouple the power supply circuitry from the arcing load. The power supply includes a plurality of discrete switching type dc--dc converter modules.

  11. Biasing and fast degaussing circuit for magnetic materials

    DOE Patents [OSTI]

    Dress, W.B. Jr.; McNeilly, D.R.

    1983-10-04T23:59:59.000Z

    A dual-function circuit is provided which may be used to both magnetically bias and alternately, quickly degauss a magnetic device. The circuit may be magnetically coupled or directly connected electrically to a magnetic device, such as a magnetostrictive transducer, to magnetically bias the device by applying a dc current and alternately apply a selectively damped ac current to the device to degauss the device. The circuit is of particular value in many systems which use magnetostrictive transducers for ultrasonic transmission in different propagation modes over very short time periods.

  12. Biasing and fast degaussing circuit for magnetic materials

    DOE Patents [OSTI]

    Dress, Jr., William B. (Lenoir City, TN); McNeilly, David R. (Maryville, TN)

    1984-01-01T23:59:59.000Z

    A dual-function circuit is provided which may be used to both magnetically bias and alternately, quickly degauss a magnetic device. The circuit may be magnetically coupled or directly connected electrically to a magnetic device, such as a magnetostrictive transducer, to magnetically bias the device by applying a d.c. current and alternately apply a selectively damped a.c. current to the device to degauss the device. The circuit is of particular value in many systems which use magnetostrictive transducers for ultrasonic transmission in different propagation modes over very short time periods.

  13. A convex approximation approach to Weighted Sum Rate Maximization of Multiuser MISO Interference Channel under outage constraints

    E-Print Network [OSTI]

    Li, Wei-Chiang; Lin, Che; Chi, Chong-Yung

    2010-01-01T23:59:59.000Z

    This paper considers weighted sum rate maximization of multiuser multiple-input single-output interference channel (MISO-IFC) under outage constraints. The outage-constrained weighted sum rate maximization problem is a nonconvex optimization problem and is difficult to solve. While it is possible to optimally deal with this problem in an exhaustive search manner by finding all the Pareto-optimal rate tuples in the (discretized) outage-constrained achievable rate region, this approach, however, suffers from a prohibitive computational complexity and is feasible only when the number of transmitter-receive pairs is small. In this paper, we propose a convex optimization based approximation method for efficiently handling the outage-constrained weighted sum rate maximization problem. The proposed approximation method consists of solving a sequence of convex optimization problems, and thus can be efficiently implemented by interior-point methods. Simulation results show that the proposed method can yield near-optim...

  14. 1186 IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 54, NO. 3, MARCH 2008 DiversityMultiplexing Tradeoff and Outage

    E-Print Network [OSTI]

    Lee, Yong Hoon

    is derived. The DMT and outage performance are also analyzed for Rician mul- tiple-input­single-output (MISO- icantly improve link reliability by transmit diversity such as space­time coding [4], [5]. However

  15. A Novel Predictive Inductor Multiplier for Integrated Circuit DC-DC Converters in Portable Applications

    E-Print Network [OSTI]

    Rincon-Mora, Gabriel A.

    that the converter appears to have an induct- ance thirty-eight times the value actually used. Compensating for small voltage. This is a major limitation in very common situations like when a Lithium ion battery in the three is a switched capacitor converter, also called a charge pump. In these topologies, one or more capacitors

  16. Power flow analysis for DC voltage droop controlled DC microgrids

    E-Print Network [OSTI]

    Chaudhary, Sanjay

    loss, such as photovoltaic panels, batteries, fuel cells, LEDs, and electronic loads, DC microgrids sharing and secondary voltage regulation can now be analytically studied, and specialized optimization of the DC microgrid, in term of systematic analysis, protection coordination design, network optimization

  17. Charge regulation circuit

    DOE Patents [OSTI]

    Ball, Don G. (Livermore, CA)

    1992-01-01T23:59:59.000Z

    A charge regulation circuit provides regulation of an unregulated voltage supply in the range of 0.01%. The charge regulation circuit is utilized in a preferred embodiment in providing regulated voltage for controlling the operation of a laser.

  18. Feasibility Study for the K-Area Bingham Pump Outage Pit (643-1G)

    SciTech Connect (OSTI)

    Palmer, E.R. [Westinghouse Savannah River Company, AIKEN, SC (United States)

    1997-05-01T23:59:59.000Z

    The K-Area Bingham Pump Outage Pit (KBPOP) is one of four BPOP areas at Savannah River Site (SRS), collectively referred to as the BPOP waste unit group. This Feasibility Study (FS) of Remedial Alternatives serves as the lead FS for the BPOP waste unit group. This section identifies the purpose and scope of the FS and presents site background information summarized from the Final Remedial Investigation Report with Baseline Risk Assessment (RI/BRA) WSRC-RP- 95-1555, Rev. 1.2 (WSRC 1997).

  19. Piezoelectric drive circuit

    DOE Patents [OSTI]

    Treu, C.A. Jr.

    1999-08-31T23:59:59.000Z

    A piezoelectric motor drive circuit is provided which utilizes the piezoelectric elements as oscillators and a Meacham half-bridge approach to develop feedback from the motor ground circuit to produce a signal to drive amplifiers to power the motor. The circuit automatically compensates for shifts in harmonic frequency of the piezoelectric elements due to pressure and temperature changes. 7 figs.

  20. Piezoelectric drive circuit

    DOE Patents [OSTI]

    Treu, Jr., Charles A. (Raymore, MO)

    1999-08-31T23:59:59.000Z

    A piezoelectric motor drive circuit is provided which utilizes the piezoelectric elements as oscillators and a Meacham half-bridge approach to develop feedback from the motor ground circuit to produce a signal to drive amplifiers to power the motor. The circuit automatically compensates for shifts in harmonic frequency of the piezoelectric elements due to pressure and temperature changes.

  1. DC-DC converter current source fed naturally commutated brushless DC motor drive 

    E-Print Network [OSTI]

    Khopkar, Rahul Vijaykumar

    2004-11-15T23:59:59.000Z

    inductor and the huge number of turns needed to achieve these values of the inductances lead to huge resistive losses. Therefore, it is shown that it is possible to replace the controlled rectifier and the large inductor with a suitable dc-dc converter...

  2. DC WRRC REPORT NO. 115 Conference Proceedings

    E-Print Network [OSTI]

    District of Columbia, University of the

    DC WRRC REPORT NO. 115 Conference Proceedings: An Agenda for Black Universities and Colleges. Kargbo Conference Sponsored by The DC Water Resources Research Center University of the District

  3. Bi-Directional DC-DC Converter for PHEV Applications

    SciTech Connect (OSTI)

    Abas Goodarzi

    2011-01-31T23:59:59.000Z

    Plug-In Hybrid Electric Vehicles (PHEV) require high power density energy storage system (ESS) for hybrid operation and high energy density ESS for Electric Vehicle (EV) mode range. However, ESS technologies to maximize power density and energy density simultaneously are not commercially feasible. The use of bi-directional DC-DC converter allows use of multiple energy storage, and the flexible DC-link voltages can enhance the system efficiency and reduce component sizing. This will improve fuel consumption, increase the EV mode range, reduce the total weight, reduce battery initial and life cycle cost, and provide flexibility in system design.

  4. Development and interrupting tests on 250KV 8KA HVDC circuit breaker

    SciTech Connect (OSTI)

    Tokuyama, S.; Arimatsu, K.; Hirata, K.; Kato, Y.; Yoshioka, Y.

    1985-09-01T23:59:59.000Z

    This paper describes the circuit and component selections, development and equivalent circuit test results on an HVDC circuit breaker for an HVDC transmission line. A puffer type SF/sub 6/ gas interrupter for AC circuit breakers is utilized for interrupting DC current with injection of high-frequency inverse current from a commutating capacitor precharged to HVDC line voltage. Also, the effectiveness of application of the HVDC breaker to an HVDC system with two parallel transmission lines is demonstrated through the EMTP simulation.

  5. Convergence Analysis of DC Algorithm for DC programming with ...

    E-Print Network [OSTI]

    2010-09-14T23:59:59.000Z

    In this paper, we consider DC programming with subanalytic data. ... Lojasiewicz inequality is an ingredient tool in Subanalytic Geometry as well as in its ... us list some of the elementary properties of subanalytic sets and subanalytic functions ...

  6. Multilevel-Dc-Bus Inverter For Providing Sinusoidal And Pwm Electrical Machine Voltages

    DOE Patents [OSTI]

    Su, Gui-Jia [Knoxville, TN

    2005-11-29T23:59:59.000Z

    A circuit for controlling an ac machine comprises a full bridge network of commutation switches which are connected to supply current for a corresponding voltage phase to the stator windings, a plurality of diodes, each in parallel connection to a respective one of the commutation switches, a plurality of dc source connections providing a multi-level dc bus for the full bridge network of commutation switches to produce sinusoidal voltages or PWM signals, and a controller connected for control of said dc source connections and said full bridge network of commutation switches to output substantially sinusoidal voltages to the stator windings. With the invention, the number of semiconductor switches is reduced to m+3 for a multi-level dc bus having m levels. A method of machine control is also disclosed.

  7. Catalog of DC Appliances and Power Systems

    SciTech Connect (OSTI)

    Garbesi, Karina; Vossos, Vagelis; Shen, Hongxia

    2010-10-13T23:59:59.000Z

    This document catalogs the characteristics of current and potential future DC products and power systems.

  8. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    energy efficient products that utilize DC power internally; the demonstrated energy savings of direct-DC in commercial data centers;energy efficient products that utilize DC power internally, the demonstrated energy savings of direct-DC power use in commercial data centers,

  9. EC5135: Analog Electronic Circuits EC3102: Analog Circuits

    E-Print Network [OSTI]

    Krishnapura, Nagendra

    #12;Course prerequisites Circuit analysis Mesh, nodal analyses RLC, linear dependent sources Laplace and Kemmerly, Engineering Circuit Analysis, McGraw Hill, 6/e. B. P. Lathi, Linear Systems and Signals, Oxford Circuits EC3102: Analog Circuits #12;Course contents Nonlinear circuits-incremental analysis Obtaining

  10. Regenerative feedback resonant circuit

    DOE Patents [OSTI]

    Jones, A. Mark; Kelly, James F.; McCloy, John S.; McMakin, Douglas L.

    2014-09-02T23:59:59.000Z

    A regenerative feedback resonant circuit for measuring a transient response in a loop is disclosed. The circuit includes an amplifier for generating a signal in the loop. The circuit further includes a resonator having a resonant cavity and a material located within the cavity. The signal sent into the resonator produces a resonant frequency. A variation of the resonant frequency due to perturbations in electromagnetic properties of the material is measured.

  11. Remote reset circuit

    DOE Patents [OSTI]

    Gritzo, Russell E. (West Melbourne, FL)

    1987-01-01T23:59:59.000Z

    A remote reset circuit acts as a stand-alone monitor and controller by clocking in each character sent by a terminal to a computer and comparing it to a given reference character. When a match occurs, the remote reset circuit activates the system's hardware reset line. The remote reset circuit is hardware based centered around monostable multivibrators and is unaffected by system crashes, partial serial transmissions, or power supply transients.

  12. Understanding the Benefits of Dispersed Grid-Connected Photovoltaics: From Avoiding the Next Major Outage to Taming Wholesale Power Markets

    SciTech Connect (OSTI)

    Letendre, Steven E.; Perez, Richard

    2006-07-15T23:59:59.000Z

    Thanks to new solar resource assessment techniques using cloud cover data available from geostationary satellites, it is apparent that grid-connected PV installations can serve to enhance electric grid reliability, preventing or hastening recovery from major power outages and serving to mitigate extreme price spikes in wholesale energy markets. (author)

  13. IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 24, NO. 3, AUGUST 2009 1633 Direct Calculation of Line Outage Distribution Factors

    E-Print Network [OSTI]

    Fu, Yong

    IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 24, NO. 3, AUGUST 2009 1633 Direct Calculation of Line significantly the security analyses of power systems. This letter provides two direct proofs for expressing distribution factor, power transfer distribution factor, shift factor. I. INTRODUCTION LINE outage distribution

  14. Electromagnetic Interference (EMI) Resisting Analog Integrated Circuit Design Tutorial

    E-Print Network [OSTI]

    Yu, Jingjing

    2012-10-19T23:59:59.000Z

    confusing sometimes, because parasitic capacitances influence the slew rates, the strong and also the weak nonlinear distortion in the input stage. When a high frequency EMI signal that does not force the transistors into cut-off is applied to the inputs...-stage OTA circuit simplified at high frequency .................................... 23 Fig. 3. 1. Diode-connected NMOS transistor .............................................................. 26 Fig. 3. 2. DC shifting of Vgs in diode...

  15. Olkiluoto 1 and 2 - Plant efficiency improvement and lifetime extension-project (PELE) implemented during outages 2010 and 2011

    SciTech Connect (OSTI)

    Kosonen, M.; Hakola, M. [Teollisuuden Voima Oyj, F- 27160 Eurajoki (Finland)

    2012-07-01T23:59:59.000Z

    Teollisuuden Voima Oyj (TVO) is a non-listed public company founded in 1969 to produce electricity for its stakeholders. TVO is the operator of the Olkiluoto nuclear power plant. TVO follows the principle of continuous improvement in the operation and maintenance of the Olkiluoto plant units. The PELE project (Plant Efficiency Improvement and Lifetime Extension), mainly completed during the annual outages in 2010 and 2011, and forms one part of the systematic development of Olkiluoto units. TVO maintains a long-term development program that aims at systematically modernizing the plant unit systems and equipment based on the latest technology. According to the program, the Olkiluoto 1 and Olkiluoto 2 plant units are constantly renovated with the intention of keeping them safe and reliable, The aim of the modernization projects is to improve the safety, reliability, and performance of the plant units. PELE project at Olkiluoto 1 was done in 2010 and at Olkiluoto 2 in 2011. The outage length of Olkiluoto 1 was 26 d 12 h 4 min and Olkiluoto 2 outage length was 28 d 23 h 46 min. (Normal service-outage is about 14 days including refueling and refueling-outage length is about seven days. See figure 1) The PELE project consisted of several single projects collected into one for coordinated project management. Some of the main projects were as follows: - Low pressure turbines: rotor, stator vane, casing and turbine instrumentation replacement. - Replacement of Condenser Cooling Water (later called seawater pumps) pumps - Replacement of inner isolation valves on the main steam lines. - Generator and the generator cooling system replacement. - Low voltage switchgear replacement. This project will continue during future outages. PELE was a success. 100 TVO employees and 1500 subcontractor employees participated in the project. The execution of the PELE projects went extremely well during the outages. The replacement of the low pressure turbines and seawater pumps improved the efficiency of the plant units, and a power increase of nearly 20 MW was achieved at both plant units. PELE wonderfully manifests one of the strategic goals of our company; developing the competence of our in-house personnel by working in projects. (authors)

  16. Composite resonance: A circuit approach to the waveform distortion dynamics of an HVdc converter

    SciTech Connect (OSTI)

    Wood, A.R.; Arrillaga, J. [Univ. of Canterbury, Christchurch (New Zealand)] [Univ. of Canterbury, Christchurch (New Zealand)

    1995-10-01T23:59:59.000Z

    A frequency domain analysis is applied to a controlled HVdc converter interconnecting ac and dc networks. The converter is considered as a three port network, and described using transfer functions. Using ac and dc system frequency dependent impedances an equivalent electrical circuit is constructed. The concept of composite resonance is introduced to emphasize the interaction between the ac and dc systems, and a simplified damping factor derived to predict the dynamics of waveform distortion during transient recovery. The frequency domain analysis is verified by dynamic simulation.

  17. Switching coordination of distributed dc-dc converters for highly efficient photovoltaic power plants

    DOE Patents [OSTI]

    Agamy, Mohammed; Elasser, Ahmed; Sabate, Juan Antonio; Galbraith, Anthony William; Harfman Todorovic, Maja

    2014-09-09T23:59:59.000Z

    A distributed photovoltaic (PV) power plant includes a plurality of distributed dc-dc converters. The dc-dc converters are configured to switch in coordination with one another such that at least one dc-dc converter transfers power to a common dc-bus based upon the total system power available from one or more corresponding strings of PV modules. Due to the coordinated switching of the dc-dc converters, each dc-dc converter transferring power to the common dc-bus continues to operate within its optimal efficiency range as well as to optimize the maximum power point tracking in order to increase the energy yield of the PV power plant.

  18. Light-weight DC to very high voltage DC converter

    DOE Patents [OSTI]

    Druce, Robert L. (Union City, CA); Kirbie, Hugh C. (Dublin, CA); Newton, Mark A. (Livermore, CA)

    1998-01-01T23:59:59.000Z

    A DC-DC converter capable of generating outputs of 100 KV without a transformer comprises a silicon opening switch (SOS) diode connected to allow a charging current from a capacitor to flow into an inductor. When a specified amount of charge has flowed through the SOS diode, it opens up abruptly; and the consequential collapsing field of the inductor causes a voltage and current reversal that is steered into a load capacitor by an output diode. A switch across the series combination of the capacitor, inductor, and SOS diode closes to periodically reset the SOS diode by inducing a forward-biased current.

  19. Light-weight DC to very high voltage DC converter

    DOE Patents [OSTI]

    Druce, R.L.; Kirbie, H.C.; Newton, M.A.

    1998-06-30T23:59:59.000Z

    A DC-DC converter capable of generating outputs of 100 KV without a transformer comprises a silicon opening switch (SOS) diode connected to allow a charging current from a capacitor to flow into an inductor. When a specified amount of charge has flowed through the SOS diode, it opens up abruptly; and the consequential collapsing field of the inductor causes a voltage and current reversal that is steered into a load capacitor by an output diode. A switch across the series combination of the capacitor, inductor, and SOS diode closes to periodically reset the SOS diode by inducing a forward-biased current. 1 fig.

  20. Circuit Theory for Analysis and Design of Spintronic Integrated Circuits

    E-Print Network [OSTI]

    Manipatruni, Sasikanth; Young, Ian A

    2011-01-01T23:59:59.000Z

    We present a theoretical and a numerical formalism for analysis and design of spintronic integrated circuits (SPINICs). The proposed formalism encompasses a generalized circuit theory for spintronic integrated circuits based on nanomagnetic dynamics and spin transport. We derive the circuit models for vector spin conduction in non-magnetic and magnetic components. We then propose an extension to the modified nodal analysis for the analysis of spin circuits. We demonstrate the applicability of the proposed theory using an example spin logic circuit.

  1. Compensated gain control circuit for buck regulator command charge circuit

    DOE Patents [OSTI]

    Barrett, David M. (Albuquerque, NM)

    1996-01-01T23:59:59.000Z

    A buck regulator command charge circuit includes a compensated-gain control signal for compensating for changes in the component values in order to achieve optimal voltage regulation. The compensated-gain control circuit includes an automatic-gain control circuit for generating a variable-gain control signal. The automatic-gain control circuit is formed of a precision rectifier circuit, a filter network, an error amplifier, and an integrator circuit.

  2. Compensated gain control circuit for buck regulator command charge circuit

    DOE Patents [OSTI]

    Barrett, D.M.

    1996-11-05T23:59:59.000Z

    A buck regulator command charge circuit includes a compensated-gain control signal for compensating for changes in the component values in order to achieve optimal voltage regulation. The compensated-gain control circuit includes an automatic-gain control circuit for generating a variable-gain control signal. The automatic-gain control circuit is formed of a precision rectifier circuit, a filter network, an error amplifier, and an integrator circuit. 5 figs.

  3. AC Circuits Magnetic flux

    E-Print Network [OSTI]

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

    , i = 0 At t=, i =/R #12;Charging and discharging RL circuit Now move switch to position b so battery, B, in its central region Inductance, L is defined as Inductance per unit length of a solenoid in a circuit A changing current in a coil generates a self-induced emf, L in the coil Process is called self-induction

  4. Liquid detection circuit

    DOE Patents [OSTI]

    Regan, Thomas O. (North Aurora, IL)

    1987-01-01T23:59:59.000Z

    Herein is a circuit which is capable of detecting the presence of liquids, especially cryogenic liquids, and whose sensor will not overheat in a vacuum. The circuit parameters, however, can be adjusted to work with any liquid over a wide range of temperatures.

  5. Quantum Circuits Architecture

    E-Print Network [OSTI]

    Giulio Chiribella; Giacomo Mauro D'Ariano; Paolo Perinotti

    2007-12-09T23:59:59.000Z

    We present a method for optimizing quantum circuits architecture. The method is based on the notion of "quantum comb", which describes a circuit board in which one can insert variable subcircuits. The method allows one to efficiently address novel kinds of quantum information processing tasks, such as storing-retrieving, and cloning of channels.

  6. DC and RF Measurements of Serial Bi-SQUID Arrays

    E-Print Network [OSTI]

    Prokopenko, G V; de Escobar, A Leese; Taylor, B; de Andrade, M C; Berggren, S; Longhini, P; Palacios, A; Nisenoff, M; Fagaly, R L

    2012-01-01T23:59:59.000Z

    SQUID arrays are promising candidates for low profile antennas and low noise amplifier applications. We present the integrated circuit designs and results of DC and RF measurements of the wideband serial arrays based on integration of linear bi-SQUID cells forming a Superconducting Quantum Interference Filter (bi-SQUID SQIF). Various configurations of serial arrays designs are described. The measured linearity, power gain, and noise temperature are analyzed and compared. The experimental results are matched to results of mathematical modeling. A serial bi-SQUID SQIF arrays are mounted into a coplanar waveguide (CPW) and symmetrically grounded to corresponding sides of CPW. The RF output comes out from the central common line, which is also used for DC biasing and forms a symmetrical balanced output. The signal and DC flux biasing line is designed as coplanar lines passed in parallel over each bi-SQUID cell in a bidirectional fashion concentrating magnetic flux inside of each cell. Serial bi-SQUID SQIF arrays ...

  7. AC and DC power transmission

    SciTech Connect (OSTI)

    Not Available

    1985-01-01T23:59:59.000Z

    The technical and economic assessment of AC and DC transmission systems; long distance transmission, cable transmission, system inter-connection, voltage support, reactive compensation, stabilisation of systems; parallel operation of DC links with AC systems; comparison between alternatives for particular schemes. Design and application equipment: design, testing and application of equipment for HVDC, series and shunt static compensated AC schemes, including associated controls. Installations: overall design of stations and conductor arrangements for HVDC, series and shunt static AC schemes including insulation co-ordination. System analysis and modelling.

  8. Improvement of power supply EMC by chaos J.H.B. Deane and D.C. Hamill

    E-Print Network [OSTI]

    Deane, Jonathan

    Improvement of power supply EMC by chaos J.H.B. Deane and D.C. Hamill Department of Electronic is spread, its peaks are reduced and EMC is improved, compared to the case when the circuit is operating consisting of the switching frequency and many harmonics. Such interference poses significant EMC problems

  9. DC to DC power converters and methods of controlling the same

    DOE Patents [OSTI]

    Steigerwald, Robert Louis; Elasser, Ahmed; Sabate, Juan Antonio; Todorovic, Maja Harfman; Agamy, Mohammed

    2012-12-11T23:59:59.000Z

    A power generation system configured to provide direct current (DC) power to a DC link is described. The system includes a first power generation unit configured to output DC power. The system also includes a first DC to DC converter comprising an input section and an output section. The output section of the first DC to DC converter is coupled in series with the first power generation unit. The first DC to DC converter is configured to process a first portion of the DC power output by the first power generation unit and to provide an unprocessed second portion of the DC power output of the first power generation unit to the output section.

  10. The Design of a RapidDischarge Varistor System for the MICE Magnet Circuits

    SciTech Connect (OSTI)

    Green, Michael A.

    2008-07-23T23:59:59.000Z

    The need for a magnet circuit discharge system, in order to protect the magnet HTS leads during a power failure, has been discussed in recent MICE reports [1], [2]. In order to rapidly discharge a magnet, one has to put enough resistance across the lead. The resistance in this case is varistor that is put across the magnet in the event of a power outage. The resistance consists of several diodes, which act as constant voltage resistors and the resistance of the cables connecting the magnets in the circuit to each other and to the power supply. In order for the rapid discharge system to work without quenching the magnets, the voltage across the magnets must be low enough so that the diodes in the quench protection circuit don't fire and cause the magnet current to bypass the superconducting coils. It is proposed that six rapid discharge varistors be installed across the three magnet circuits the power the tracker solenoids, which are connected in series. The focusing magnets, which are also connected in series would have three varistors (one for each magnet). The coupling magnets would have a varistor for each magnet. The peak voltage that is allowed per varistor depends on the number of quench protection diodes that make up the quench protection circuit for each magnet coil circuit. It is proposed that the varistors be water cooled as the magnet circuits are being discharged through them. The water cooling circuit can be supplied with tap water. The tap water flows only when the varistor temperature reaches a temperature of 45 C.

  11. Sensor readout detector circuit

    DOE Patents [OSTI]

    Chu, D.D.; Thelen, D.C. Jr.

    1998-08-11T23:59:59.000Z

    A sensor readout detector circuit is disclosed that is capable of detecting sensor signals down to a few nanoamperes or less in a high (microampere) background noise level. The circuit operates at a very low standby power level and is triggerable by a sensor event signal that is above a predetermined threshold level. A plurality of sensor readout detector circuits can be formed on a substrate as an integrated circuit (IC). These circuits can operate to process data from an array of sensors in parallel, with only data from active sensors being processed for digitization and analysis. This allows the IC to operate at a low power level with a high data throughput for the active sensors. The circuit may be used with many different types of sensors, including photodetectors, capacitance sensors, chemically-sensitive sensors or combinations thereof to provide a capability for recording transient events or for recording data for a predetermined period of time following an event trigger. The sensor readout detector circuit has applications for portable or satellite-based sensor systems. 6 figs.

  12. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    main conclusions about off-grid markets for DC appliances,and power systems. Mature Off-Grid Markets for DC Appliancesapplications include off-grid residential, telecom, remote

  13. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    DC Conversion Loss Savings of Appliances Running on DirectConversion Loss Savings of Appliances Running on Direct DCrunning on AC and, in column B, the avoided AC-DC conversions losses

  14. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    DC solar-powered DC air-conditioning heat pump produced byRoom Air Conditioners Geothermal Heat Pumps Lighting-efficiency of an air source electric heat-pump water heater

  15. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    and energy-savings potential of using direct current (DC) generated by on-site renewablepotential, benefits, and barriers of using DC generated by on-site renewable energy

  16. DC systems with transformerless converters

    SciTech Connect (OSTI)

    Vithayathil, J.J.; Mittlestadt, W. [Bonneville Power Administration, Portland, OR (United States)] [Bonneville Power Administration, Portland, OR (United States); Bjoerklund, P.E. [ABB Power Systems AB, Ludvika (Sweden)] [ABB Power Systems AB, Ludvika (Sweden)

    1995-07-01T23:59:59.000Z

    A technical and economic feasibility study of HVDC systems without converter transformers is presented. The presentation includes proposed solutions to the drawback related to the absence of galvanic separation between the ac and dc systems, if the converter transformers are eliminated. The results show that HVDC systems without converter transformers are both technically and economically feasible. The cost savings can be substantial.

  17. FEDERAL COMMUNICATIONS COMMISSION Washington, DC

    E-Print Network [OSTI]

    Peha, Jon M.

    1 Before the FEDERAL COMMUNICATIONS COMMISSION Washington, DC GN Docket No. 14-28 In the Matter 15213-3890 peha@cmu.edu July 15, 2014 #12;2 Executive Summary It is important for the Commission situated entity. This policy would particularly benefit new entrepreneurial ventures. The Commission should

  18. Nonlinear Circuit Analysis An Introduction 1. Why nonlinear circuits?

    E-Print Network [OSTI]

    Hart, Gus

    Nonlinear Circuit Analysis ­ An Introduction 1. Why nonlinear circuits? Electrical devices: the oscillator. 2. What is a nonlinear circuit? It is easy to understand the difference between a linear and a nonlinear circuit by looking at the difference between a linear and a nonlinear equation: y x ¡ 2 (1) y

  19. FC/Battery Power Management for Electric Vehicle Based Interleaved dc-dc Boost Converter Topology

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    FC/Battery Power Management for Electric Vehicle Based Interleaved dc- dc Boost Converter Topology.fr Keywords Fuel cell System (FCS), Electric vehicle, Energy management, Interleaved Boost DC-DC Converter (FC for electric vehicle may not be feasible to satisfy the peak demand changes especially during accelerations

  20. Design and development of a DC-DC converter for a fuel cell inverter system

    E-Print Network [OSTI]

    Gopinath, Rajesh

    2001-01-01T23:59:59.000Z

    This thesis outlines the design and development of a DC-DC converter for a fuel cell inverter application. The proposed DC-DC converter was designed and tested at Texas A&M to meet the specifications laid down for the '2001 Future Energy Challenge...

  1. Analysis and design of a high power dc-dc converter

    E-Print Network [OSTI]

    Husain, Iqbal

    1989-01-01T23:59:59.000Z

    , for example in dc motors, traction motor control, marine hoist~, trolley cars, forklift trucks, mine haulers, dc voltage regulators etc. These choppers can be used for regeneration in the braking mode of a. dc motor pumping energy back to the system.... The elements of a dc-dc SP C are shown in figure 1. 2. The output voltage is usually regulated by pulse width modulation (PAVM) techniques. Input + V, DC Chopper Output V, Control Amp. V, + Ref. Fig. 1. 2 Block diagram of a SPC dc chopper...

  2. Superconducting flux flow digital circuits

    DOE Patents [OSTI]

    Hietala, V.M.; Martens, J.S.; Zipperian, T.E.

    1995-02-14T23:59:59.000Z

    A NOR/inverter logic gate circuit and a flip flop circuit implemented with superconducting flux flow transistors (SFFTs) are disclosed. Both circuits comprise two SFFTs with feedback lines. They have extremely low power dissipation, very high switching speeds, and the ability to interface between Josephson junction superconductor circuits and conventional microelectronics. 8 figs.

  3. Risk-based evaluation of Allowed Outage Times (AOTs) considering risk of shutdown

    SciTech Connect (OSTI)

    Mankamo, T. [Avaplan Oy, Espoo (Finland); Kim, I.S.; Samanta, P.K. [Brookhaven National Lab., Upton, NY (United States)

    1992-12-31T23:59:59.000Z

    When safety systems fail during power operation, Technical Specifications (TS) usually limit the repair within Allowed Outage Time (AOT). If the repair cannot be completed within the AOT, or no AOT is allowed, the plant is required to be shut down for the repair. However, if the capability to remove decay heat is degraded, shutting down the plant with the need to operate the affected decay-heat removal systems may impose a substantial risk compared to continued power operation over a usual repair time. Thus, defining a proper AOT in such situations can be considered as a risk-comparison between the repair in frill power state with a temporarily increased level of risk, and the altemative of shutting down the plant for the repair in zero power state with a specific associated risk. The methodology of the risk-comparison approach, with a due consideration of the shutdown risk, has been further developed and applied to the AOT considerations of residual heat removal and standby service water systems of a boiling water reactor (BWR) plant. Based on the completed work, several improvements to the TS requirements for the systems studied can be suggested.

  4. Risk-based evaluation of Allowed Outage Times (AOTs) considering risk of shutdown

    SciTech Connect (OSTI)

    Mankamo, T. (Avaplan Oy, Espoo (Finland)); Kim, I.S.; Samanta, P.K. (Brookhaven National Lab., Upton, NY (United States))

    1992-01-01T23:59:59.000Z

    When safety systems fail during power operation, Technical Specifications (TS) usually limit the repair within Allowed Outage Time (AOT). If the repair cannot be completed within the AOT, or no AOT is allowed, the plant is required to be shut down for the repair. However, if the capability to remove decay heat is degraded, shutting down the plant with the need to operate the affected decay-heat removal systems may impose a substantial risk compared to continued power operation over a usual repair time. Thus, defining a proper AOT in such situations can be considered as a risk-comparison between the repair in frill power state with a temporarily increased level of risk, and the altemative of shutting down the plant for the repair in zero power state with a specific associated risk. The methodology of the risk-comparison approach, with a due consideration of the shutdown risk, has been further developed and applied to the AOT considerations of residual heat removal and standby service water systems of a boiling water reactor (BWR) plant. Based on the completed work, several improvements to the TS requirements for the systems studied can be suggested.

  5. A hierarchical circuit extractor

    E-Print Network [OSTI]

    Ledbetter, William Burl

    1982-01-01T23:59:59.000Z

    Hierarchical Circuit Extractor (May 1982) William Burl Ledbetter Jr. , B. S. , Texas ASM University Co-Chairmen of Advisory Committee: Dr. Phil S. Noe and Dr. Noel R. Strader This thesi s describes the development of a hierarchical circuit extraction.... ACKNOWLEDGMENTS I would like to express my gratitude to Dr. N. R. Strader for his help in the preparation of this thesis and for the use of his rasteri zer in LEXTRACT. I also thank Dr. P. S. Noe, Dr. P. E. Allen, and Dr. W. M. Lively for serving on my...

  6. Electrical Circuit Tester

    DOE Patents [OSTI]

    Love, Frank (Amarillo, TX)

    2006-04-18T23:59:59.000Z

    An electrical circuit testing device is provided, comprising a case, a digital voltage level testing circuit with a display means, a switch to initiate measurement using the device, a non-shorting switching means for selecting pre-determined electrical wiring configurations to be tested in an outlet, a terminal block, a five-pole electrical plug mounted on the case surface and a set of adapters that can be used for various multiple-pronged electrical outlet configurations for voltages from 100 600 VAC from 50 100 Hz.

  7. Active dc filter for HVDC systems

    SciTech Connect (OSTI)

    Zhang, W. (Royal Inst. of Tech., Stockholm (Sweden)); Asplund, G.

    1994-01-01T23:59:59.000Z

    This article is a case history of the installation of active dc filters for high-performance, low-cost harmonics filtering at the Lindome converter station in the Konti-Skan 2 HVDC transmission link between Denmark and Sweden. The topics of the article include harmonics, interference, and filters, Lindome active dc filter, active dc filter design, digital signal processor, control scheme, protection and fault monitoring, and future applications.

  8. DC switching regulated power supply for driving an inductive load

    DOE Patents [OSTI]

    Dyer, G.R.

    1983-11-29T23:59:59.000Z

    A dc switching regulated power supply for driving an inductive load is provided. The regulator basic circuit is a bridge arrangement of diodes and transistors. First and second opposite legs of the bridge are formed by first and second parallel-connected transistor arrays, respectively, while the third and fourth legs of the bridge are formed by appropriately connected first and second parallel connected diode arrays, respectively. A dc power supply is connected to the input of the bridge and the output is connected to the load. A servo controller is provided to control the switching rate of the transistors to maintain a desired current to the load. The regulator may be operated in three stages or modes: (1) for current runup in the load, both first and second transistor switch arrays are turned on and current is supplied to the load through both transistor arrays. (2) When load current reaches the desired level, the first switch is turned off, and load current flywheels through the second switch array and the fourth leg diode array connecting the second switch array in series with the load. Current is maintained by alternating between modes 1 and 2 at a suitable duty cycle and switching rate set by the controller. (3) Rapid current rundown is accomplished by turning both switch arrays off, allowing load current to be dumped back into the source through the third and fourth diode arrays connecting the source in series opposition with the load to recover energy from the inductive load.

  9. Computer-aided optimization of DC/DC converters for automotive applications

    E-Print Network [OSTI]

    Neugebauer, Timothy C.

    This paper investigates computer-aided optimization of DC/DC converters, with a focus on converters for dual-voltage automotive electrical systems. A new CAD optimization approach based on Monte Carlo search methods is ...

  10. High efficiency resonant dc/dc converter for solar power applications

    E-Print Network [OSTI]

    Inam, Wardah

    2013-01-01T23:59:59.000Z

    This thesis presents a new topology for a high efficiency dc/dc resonant power converter that utilizes a resistance compression network to provide simultaneous zero voltage switching and near zero current switching across ...

  11. New Architectures for Radio-Frequency DC-DC Power Conversion

    E-Print Network [OSTI]

    Rivas, Juan M.

    This document proposes two new architectures for switched-mode dc–dc power conversion. The proposed architectures enable dramatic increases in switching frequency to be realized while preserving features critical in practice, ...

  12. Optimization of Integrated Transistors for Very High Frequency DC-DC Converters

    E-Print Network [OSTI]

    Sagneri, Anthony D.

    This paper presents a method to optimize integrated lateral double-diffused MOSFET transistors for use in very high frequency (VHF, 30-300 MHz) dc-dc converters. A transistor model valid at VHF switching frequencies is ...

  13. DC to DC power conversion module for the all-electric ship

    E-Print Network [OSTI]

    Gray, Weston L

    2011-01-01T23:59:59.000Z

    The MIT end to end electric ship model is being developed to study competing electric ship designs. This project produced a model of a Power Conversion Module (PCM)- 4, DC-to-DC converter which interfaces with the MIT ...

  14. Reliability Assessment of Fault-Tolerant Dc-Dc Converters for Photovoltaic Applications

    E-Print Network [OSTI]

    Liberzon, Daniel

    Reliability Assessment of Fault-Tolerant Dc-Dc Converters for Photovoltaic Applications Sairaj V in photovoltaic energy processing applications is presented. The proposed approach acknowledges the influence through several case studies. Index Terms-- Markov reliability modeling, photovoltaic systems, power

  15. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    resistance heating and incandescent lighting, the technologyresistance heating or by DC-favoring heat pump technology (technology (electronic fluorescent and LED). Similarly, heating

  16. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    48V DC , depending on battery bank configuration. Lifetime:Characteristics: Lead-acid battery banks are composed ofto produce the desired battery bank voltage. Typical battery

  17. Circuit breaker lockout device

    DOE Patents [OSTI]

    Kozlowski, Lawrence J. (New Kensington, PA); Shirey, Lawrence A. (North Huntingdon, PA)

    1992-01-01T23:59:59.000Z

    An improved lockout assembly for locking a circuit breaker in a selected off or on position is provided. The lockout assembly includes a lock block and a lock pin. The lock block has a hollow interior which fits over the free end of a switch handle of the circuit breaker. The lock block includes at least one hole that is placed in registration with a hole in the free end of the switch handle. A lock tab on the lock block serves to align and register the respective holes on the lock block and switch handle. A lock pin is inserted through the registered holes and serves to connect the lock block to the switch handle. Once the lock block and the switch handle are connected, the position of the switch handle is prevented from being changed by the lock tab bumping up against a stationary housing portion of the circuit breaker. When the lock pin installed, an apertured-end portion of the lock pin is in registration with another hole on the lock block. Then a special scissors conforming to O.S.H.A. regulations can be installed, with one or more padlocks, on the lockout assembly to prevent removal of the lock pin from the lockout assembly, thereby preventing removal of the lockout assembly from the circuit breaker.

  18. Circuit breaker lockout device

    SciTech Connect (OSTI)

    Kozlowski, L.J.; Shirey, L.A.

    1991-12-31T23:59:59.000Z

    An improved lockout assembly for locking a circuit breaker in a selected off or on position is provided. The lockout assembly includes a lock block and a lock pin. The lock block has a hollow interior which fits over the free end of a switch handle of the circuit breaker. The lock block includes at least one hole that is placed in registration with a hole in the free end of the switch handle. A lock tab on the lock block serves to align and register the respective holes on the lock block and switch handle. A lock pin is inserted through the registered holes and serves to connect the lock block to the switch handle. Once the lock block and the switch handle are connected, the position of the switch handle is prevented from being changed by the lock tab bumping up against a stationary housing portion of the circuit breaker. When the lock pin is installed, an apertured-end portion of the lock pin is in registration with another hole on the lock block. Then a special scissors conforming to O.S.H.A. regulations can be installed, with one or more padlocks, on the lockout assembly to prevent removal of the lock pin from the lockout assembly, thereby preventing removal of the lockout assembly from the circuit breaker.

  19. Circuit breaker lockout device

    DOE Patents [OSTI]

    Kozlowski, L.J.; Shirey, L.A.

    1992-11-24T23:59:59.000Z

    An improved lockout assembly for locking a circuit breaker in a selected off or on position is provided. The lockout assembly includes a lock block and a lock pin. The lock block has a hollow interior which fits over the free end of a switch handle of the circuit breaker. The lock block includes at least one hole that is placed in registration with a hole in the free end of the switch handle. A lock tab on the lock block serves to align and register the respective holes on the lock block and switch handle. A lock pin is inserted through the registered holes and serves to connect the lock block to the switch handle. Once the lock block and the switch handle are connected, the position of the switch handle is prevented from being changed by the lock tab bumping up against a stationary housing portion of the circuit breaker. When the lock pin installed, an apertured-end portion of the lock pin is in registration with another hole on the lock block. Then a special scissors conforming to O.S.H.A. regulations can be installed, with one or more padlocks, on the lockout assembly to prevent removal of the lock pin from the lockout assembly, thereby preventing removal of the lockout assembly from the circuit breaker. 2 figs.

  20. Bioluminescent bioreporter integrated circuit

    DOE Patents [OSTI]

    Simpson, Michael L. (Knoxville, TN); Sayler, Gary S. (Blaine, TN); Paulus, Michael J. (Knoxville, TN)

    2000-01-01T23:59:59.000Z

    Disclosed are monolithic bioelectronic devices comprising a bioreporter and an OASIC. These bioluminescent bioreporter integrated circuit are useful in detecting substances such as pollutants, explosives, and heavy-metals residing in inhospitable areas such as groundwater, industrial process vessels, and battlefields. Also disclosed are methods and apparatus for environmental pollutant detection, oil exploration, drug discovery, industrial process control, and hazardous chemical monitoring.

  1. Methods of fabricating applique circuits

    DOE Patents [OSTI]

    Dimos, Duane B. (Albuquerque, NM); Garino, Terry J. (Albuquerque, NM)

    1999-09-14T23:59:59.000Z

    Applique circuits suitable for advanced packaging applications are introduced. These structures are particularly suited for the simple integration of large amounts (many nanoFarads) of capacitance into conventional integrated circuit and multichip packaging technology. In operation, applique circuits are bonded to the integrated circuit or other appropriate structure at the point where the capacitance is required, thereby minimizing the effects of parasitic coupling. An immediate application is to problems of noise reduction and control in modern high-frequency circuitry.

  2. The capacitively coupled converter (C³) for high power DC-DC conversion 

    E-Print Network [OSTI]

    Khan, Shahriar

    1992-01-01T23:59:59.000Z

    THE CAPACITIVELY COUPLED CONVERTER (C3) FOR HIGH POWER DC-DC CONVERSION A Thesis by SHAHRIAR KHAN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 1992 Major Subject: Electrical Engineering THE CAPACITIVELY COUPLED CONVERTER (Cs) FOR HIGH POWER DC-DC CONVERSION A Thesis by SHAHRIAR KHAN Approved as to style and content by: Mehrdad Ehsani (Chair of Committee) Prasad Enjeti...

  3. High voltage MOSFET switching circuit

    DOE Patents [OSTI]

    McEwan, T.E.

    1994-07-26T23:59:59.000Z

    The problem of source lead inductance in a MOSFET switching circuit is compensated for by adding an inductor to the gate circuit. The gate circuit inductor produces an inductive spike which counters the source lead inductive drop to produce a rectangular drive voltage waveform at the internal gate-source terminals of the MOSFET. 2 figs.

  4. High voltage MOSFET switching circuit

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1994-01-01T23:59:59.000Z

    The problem of source lead inductance in a MOSFET switching circuit is compensated for by adding an inductor to the gate circuit. The gate circuit inductor produces an inductive spike which counters the source lead inductive drop to produce a rectangular drive voltage waveform at the internal gate-source terminals of the MOSFET.

  5. Digitally Controlled Distributed Multiphase DC-DC Converters Xu Zhang, Luca Corradini and Dragan Maksimovic

    E-Print Network [OSTI]

    Digitally Controlled Distributed Multiphase DC-DC Converters Xu Zhang, Luca Corradini and Dragan, corradin, maksimov}@colorado.edu Abstract -- This paper describes a distributed master-slave multiphase DC V-to-12 V input, 1.3 V, 20 A output two-phase synchronous buck converter. Index Terms-- Multiphase

  6. A 4000-A HVDC (high-voltage direct-current) circuit breaker with fast fault-clearing capability: Final report

    SciTech Connect (OSTI)

    Not Available

    1988-04-01T23:59:59.000Z

    This project is a follow-up of the first development of a 500 kV HVDC airblast circuit breaker (EPRI project 1507-3). The objective was to increase the current interrupting capability from 2200 A to 4000 A and shorten its fault clearing time. A high current 500 kV HVDC circuit breaker has been built using the passive commutation circuit. The breaker is modular in construction and can be designed for a wide variety of system conditions. More than 400 current interruptions were carried out successfully. Tests have shown that this circuit breaker is capable of interrupting more than 4000 A dc. Practical breakers with current interrupting capability of even 5500 A dc could be built. The circuit breaker operation and the fault-clearing process can be materially speeded up if the trip signal is given as soon as the fault is detected and without waiting for the current levels to come down in response to converter control action. The new dc breakers are shown to be capable of withstanding these transient arc currents of 8000 A without affecting its ability to interrupt the direct current that follows the transient. This transient current withstand capability is greater than is likely to occur during dc faults. The fault clearing time of this HVDC circuit breaker is comparable to the fault clearing time of conventional ac breakers for ac faults. The developed HVDC circuit breaker is now commercially available and can be supplied for use in HVDC systems. Its use in such systems is expected to provide flexibility in system design and contribute to system stability. 38 refs., 52 figs., 9 tabs.

  7. DC-based magnetic field controller

    DOE Patents [OSTI]

    Kotter, D.K.; Rankin, R.A.; Morgan, J.P.

    1994-05-31T23:59:59.000Z

    A magnetic field controller is described for laboratory devices and in particular to dc operated magnetic field controllers for mass spectrometers, comprising a dc power supply in combination with improvements to a Hall probe subsystem, display subsystem, preamplifier, field control subsystem, and an output stage. 1 fig.

  8. DC-based magnetic field controller

    DOE Patents [OSTI]

    Kotter, Dale K. (Shelley, ID); Rankin, Richard A. (Ammon, ID); Morgan, John P,. (Idaho Falls, ID)

    1994-01-01T23:59:59.000Z

    A magnetic field controller for laboratory devices and in particular to dc operated magnetic field controllers for mass spectrometers, comprising a dc power supply in combination with improvements to a hall probe subsystem, display subsystem, preamplifier, field control subsystem, and an output stage.

  9. Recovery Act: Integrated DC-DC Conversion for Energy-Efficient Multicore Processors

    SciTech Connect (OSTI)

    Shepard, Kenneth L

    2013-03-31T23:59:59.000Z

    In this project, we have developed the use of thin-film magnetic materials to improve in energy efficiency of digital computing applications by enabling integrated dc-dc power conversion and management with on-chip power inductors. Integrated voltage regulators also enables fine-grained power management, by providing dynamic scaling of the supply voltage in concert with the clock frequency of synchronous logic to throttle power consumption at periods of low computational demand. The voltage converter generates lower output voltages during periods of low computational performance requirements and higher output voltages during periods of high computational performance requirements. Implementation of integrated power conversion requires high-capacity energy storage devices, which are generally not available in traditional semiconductor processes. We achieve this with integration of thin-film magnetic materials into a conventional complementary metal-oxide-semiconductor (CMOS) process for high-quality on-chip power inductors. This project includes a body of work conducted to develop integrated switch-mode voltage regulators with thin-film magnetic power inductors. Soft-magnetic materials and inductor topologies are selected and optimized, with intent to maximize efficiency and current density of the integrated regulators. A custom integrated circuit (IC) is designed and fabricated in 45-nm CMOS silicon-on-insulator (SOI) to provide the control system and power-train necessary to drive the power inductors, in addition to providing a digital load for the converter. A silicon interposer is designed and fabricated in collaboration with IBM Research to integrate custom power inductors by chip stacking with the 45-nm CMOS integrated circuit, enabling power conversion with current density greater than 10A/mm2. The concepts and designs developed from this work enable significant improvements in performance-per-watt of future microprocessors in servers, desktops, and mobile devices. These new approaches to scaled voltage regulation for computing devices also promise significant impact on electricity consumption in the United States and abroad by improving the efficiency of all computational platforms. In 2006, servers and datacenters in the United States consumed an estimated 61 billion kWh or about 1.5% of the nation's total energy consumption. Federal Government servers and data centers alone accounted for about 10 billion kWh, for a total annual energy cost of about $450 million. Based upon market growth and efficiency trends, estimates place current server and datacenter power consumption at nearly 85 billion kWh in the US and at almost 280 billion kWh worldwide. Similar estimates place national desktop, mobile and portable computing at 80 billion kWh combined. While national electricity utilization for computation amounts to only 4% of current usage, it is growing at a rate of about 10% a year with volume servers representing one of the largest growth segments due to the increasing utilization of cloud-based services. The percentage of power that is consumed by the processor in a server varies but can be as much as 30% of the total power utilization, with an additional 50% associated with heat removal. The approaches considered here should allow energy efficiency gains as high as 30% in processors for all computing platforms, from high-end servers to smart phones, resulting in a direct annual energy savings of almost 15 billion kWh nationally, and 50 billion kWh globally. The work developed here is being commercialized by the start-up venture, Ferric Semiconductor, which has already secured two Phase I SBIR grants to bring these technologies to the marketplace.

  10. AVTA: Battery Testing - DC Fast Charging's Effects on PEV Batteries...

    Energy Savers [EERE]

    DC Fast Charging's Effects on PEV Batteries AVTA: Battery Testing - DC Fast Charging's Effects on PEV Batteries The Vehicle Technologies Office's Advanced Vehicle Testing Activity...

  11. Vehicle Technologies Office Merit Review 2014: DC Fast Charging...

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

    DC Fast Charging Effects on Battery Life and EVSE Efficiency and Security Testing Vehicle Technologies Office Merit Review 2014: DC Fast Charging Effects on Battery Life and EVSE...

  12. Solid-state circuit breaker with current-limiting characteristic using a superconducting coil

    DOE Patents [OSTI]

    Boenig, H.J.

    1982-08-16T23:59:59.000Z

    A thyristor bridge interposes an ac source and a load. A series connected DC source and superconducting coil within the bridge biases the thyristors thereof so as to permit bidirectional ac current flow therethrough under normal operating conditions. Upon a fault condition a control circuit triggers the thyristors so as to reduce ac current flow therethrough to zero in less than two eyeles and to open the bridge thereafter. Upon a temporary overload condition the control circuit triggers the thyristors so as to limit ac current flow therethrough to an acceptable level.

  13. Magnetic force microscopy method and apparatus to detect and image currents in integrated circuits

    DOE Patents [OSTI]

    Campbell, Ann. N. (13170-B Central SE #188, Albuquerque, NM 87123); Anderson, Richard E. (2800 Tennessee NE, Albuquerque, NM 87110); Cole, Jr., Edward I. (2116 White Cloud NE, Albuquerque, NM 87112)

    1995-01-01T23:59:59.000Z

    A magnetic force microscopy method and improved magnetic tip for detecting and quantifying internal magnetic fields resulting from current of integrated circuits. Detection of the current is used for failure analysis, design verification, and model validation. The interaction of the current on the integrated chip with a magnetic field can be detected using a cantilevered magnetic tip. Enhanced sensitivity for both ac and dc current and voltage detection is achieved with voltage by an ac coupling or a heterodyne technique. The techniques can be used to extract information from analog circuits.

  14. Base drive circuit

    DOE Patents [OSTI]

    Lange, A.C.

    1995-04-04T23:59:59.000Z

    An improved base drive circuit having a level shifter for providing bistable input signals to a pair of non-linear delays. The non-linear delays provide gate control to a corresponding pair of field effect transistors through a corresponding pair of buffer components. The non-linear delays provide delayed turn-on for each of the field effect transistors while an associated pair of transistors shunt the non-linear delays during turn-off of the associated field effect transistor. 2 figures.

  15. Base drive circuit

    DOE Patents [OSTI]

    Lange, Arnold C. (Livermore, CA)

    1995-01-01T23:59:59.000Z

    An improved base drive circuit (10) having a level shifter (24) for providing bistable input signals to a pair of non-linear delays (30, 32). The non-linear delays (30, 32) provide gate control to a corresponding pair of field effect transistors (100, 106) through a corresponding pair of buffer components (88, 94). The non-linear delays (30, 32) provide delayed turn-on for each of the field effect transistors (100, 106) while an associated pair of transistors (72, 80) shunt the non-linear delays (30, 32) during turn-off of the associated field effect transistor (100, 106).

  16. Threshold voltage extraction circuit

    E-Print Network [OSTI]

    Hoon, Siew Kuok

    2000-01-01T23:59:59.000Z

    to that of the saturation method. However, instead of fixing Vos ? Vos, the drain current is measured as a function of Vos while Vns is fixed at a constant low voltage of 100mV to ensure operation in the linear MOSFET region. Neglecting channel length modulation effect... transistors are layout next to the DUT of the NMOS and PMOS Vr extraction circuits respectively for extraction of Vr via graphical means. GRAPHICAL METHOD OF THE THRESHOLD-VOLTAGE MEASUREMENT Using the graphical method, the characteristics of 4n versus Vos...

  17. DC superconducting quantum interference device usable in nuclear quadrupole resonance and zero field nuclear magnetic spectrometers

    DOE Patents [OSTI]

    Fan, N.Q.; Clarke, J.

    1993-10-19T23:59:59.000Z

    A spectrometer for measuring the nuclear quadrupole resonance spectra or the zero-field nuclear magnetic resonance spectra generated by a sample is disclosed. The spectrometer uses an amplifier having a dc SQUID operating in a flux-locked loop for generating an amplified output as a function of the intensity of the signal generated by the sample. The flux-locked loop circuit includes an integrator. The amplifier also includes means for preventing the integrator from being driven into saturation. As a result, the time for the flux-locked loop to recover from the excitation pulses generated by the spectrometer is reduced. 7 figures.

  18. DC superconducting quantum interference device usable in nuclear quadrupole resonance and zero field nuclear magnetic spectrometers

    DOE Patents [OSTI]

    Fan, Non Q. (San Diego, CA); Clarke, John (Berkeley, CA)

    1993-01-01T23:59:59.000Z

    A spectrometer for measuring the nuclear quadrupole resonance spectra or the zero-field nuclear magnetic resonance spectra generated by a sample is disclosed. The spectrometer uses an amplifier having a dc SQUID operating in a flux-locked loop for generating an amplified output as a function of the intensity of the signal generated by the sample. The flux-locked loop circuit includes an integrator. The amplifier also includes means for preventing the integrator from being driven into saturation. As a result, the time for the flux-locked loop to recover from the excitation pulses generated by the spectrometer is reduced.

  19. Thvenin's Theorem Linear two-terminal circuit

    E-Print Network [OSTI]

    Kozick, Richard J.

    Thévenin's Theorem Linear two-terminal circuit can be replaced by an equivalent circuit composed at terminals with allResistance at terminals with all independent circuit sources set to zero #12;Norton's Theorem Linear two-terminal circuit can be replaced by an equivalentbe replaced by an equivalent circuit

  20. DC High School Science Bowl Regionals

    Broader source: Energy.gov [DOE]

    This event is the Washington, D.C. High School Regional competition for the US National Science Bowl. The regional competition is run by the Office of Economic Impact and Diversity, and the...

  1. DC readout experiment in Enhanced LIGO

    E-Print Network [OSTI]

    Fricke, Tobin T

    The two 4 km long gravitational wave detectors operated by the Laser Interferometer Gravitational-wave Observatory (LIGO) were modified in 2008 to read out the gravitational wave channel using the DC readout form of homodyne ...

  2. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    www.lunera.com/. Nextek Power Systems. [cited 2010 Dec];data_files/. DC Power Systems. Wholesale Price List. [citedDUS103927W.pdf. Princeton Power Systems. GTIB-480-100 Grid-

  3. Jitter compensation circuit

    DOE Patents [OSTI]

    Sullivan, J.S.; Ball, D.G.

    1997-09-09T23:59:59.000Z

    The instantaneous V{sub co} signal on a charging capacitor is sampled and the charge voltage on capacitor C{sub o} is captured just prior to its discharge into the first stage of magnetic modulator. The captured signal is applied to an averaging circuit with a long time constant and to the positive input terminal of a differential amplifier. The averaged V{sub co} signal is split between a gain stage (G = 0.975) and a feedback stage that determines the slope of the voltage ramp applied to the high speed comparator. The 97.5% portion of the averaged V{sub co} signal is applied to the negative input of a differential amplifier gain stage (G = 10). The differential amplifier produces an error signal by subtracting 97.5% of the averaged V{sub co} signal from the instantaneous value of sampled V{sub co} signal and multiplying the difference by ten. The resulting error signal is applied to the positive input of a high speed comparator. The error signal is then compared to a voltage ramp that is proportional to the averaged V{sub co} values squared divided by the total volt-second product of the magnetic compression circuit. 11 figs.

  4. Jitter compensation circuit

    DOE Patents [OSTI]

    Sullivan, James S. (Livermore, CA); Ball, Don G. (Livermore, CA)

    1997-01-01T23:59:59.000Z

    The instantaneous V.sub.co signal on a charging capacitor is sampled and the charge voltage on capacitor C.sub.o is captured just prior to its discharge into the first stage of magnetic modulator. The captured signal is applied to an averaging circuit with a long time constant and to the positive input terminal of a differential amplifier. The averaged V.sub. co signal is split between a gain stage (G=0.975) and a feedback stage that determines the slope of the voltage ramp applied to the high speed comparator. The 97.5% portion of the averaged V.sub.co signal is applied to the negative input of a differential amplifier gain stage (G=10). The differential amplifier produces an error signal by subtracting 97.5% of the averaged V.sub.co signal from the instantaneous value of sampled V.sub.co signal and multiplying the difference by ten. The resulting error signal is applied to the positive input of a high speed comparator. The error signal is then compared to a voltage ramp that is proportional to the averaged V.sub.co values squared divided by the total volt-second product of the magnetic compression circuit.

  5. American Institute of Aeronautics and Astronautics Active System Identification of a DC-DC Converter Using

    E-Print Network [OSTI]

    American Institute of Aeronautics and Astronautics 1 Active System Identification of a DC and Computer Engineering, UCB 425. #12;American Institute of Aeronautics and Astronautics 2 analysis10

  6. Federal Government Congressional Budget Office, Budget Analysis Division Washington, DC

    E-Print Network [OSTI]

    Shyy, Wei

    Charlotte, NC Gallaher Kazakhstan, Security & Brand Integrity Almaty Oblast, Kazakhstan GMMB Washington, DC

  7. Hydrogen Storage Systems Analysis Working Group Meeting Argonne DC Offices

    E-Print Network [OSTI]

    Hydrogen Storage Systems Analysis Working Group Meeting Argonne DC Offices L'Enfant Plaza, Washington, DC December 4, 2007 SUMMARY REPORT Compiled by Romesh Kumar Argonne National Laboratory Working Group Meeting December 4, 2007 Argonne DC Offices, L'Enfant Plaza, Washington, DC Meeting

  8. Thvenin Emitter Circuit The Thvenin equivalent circuit seen looking into the emitter is useful in calculating

    E-Print Network [OSTI]

    Leach Jr.,W. Marshall

    voltage ve(oc) to the short-circuit emitter current. The circuit for calculating the short-circuit currentThévenin Emitter Circuit The Thévenin equivalent circuit seen looking into the emitter is useful. With the emitter open circuited, we denote the emitter voltage by ve(oc). The voltage source in the Thévenin

  9. Near Time-Optimal Transient Response in DC-DC Buck Converters Taking into Account the Inductor Current Limit

    E-Print Network [OSTI]

    -load transient responses [1-15]. In its simplest form, the TOC responds to a step load change with a singleNear Time-Optimal Transient Response in DC-DC Buck Converters Taking into Account the Inductor transient response of a DC-DC buck converter. The concept of current- limited, time-optimal control (CL

  10. Photoconductive circuit element reflectometer

    DOE Patents [OSTI]

    Rauscher, Christen (Alexandria, VA)

    1990-01-01T23:59:59.000Z

    A photoconductive reflectometer for characterizing semiconductor devices at millimeter wavelength frequencies where a first photoconductive circuit element (PCE) is biased by a direct current voltage source and produces short electrical pulses when excited into conductance by short first laser light pulses. The electrical pulses are electronically conditioned to improve the frequency related amplitude characteristics of the pulses which thereafter propagate along a transmission line to a device under test. Second PCEs are connected along the transmission line to sample the signals on the transmission line when excited into conductance by short second laser light pulses, spaced apart in time a variable period from the first laser light pulses. Electronic filters connected to each of the second PCEs act as low-pass filters and remove parasitic interference from the sampled signals and output the sampled signals in the form of slowed-motion images of the signals on the transmission line.

  11. Photoconductive circuit element reflectometer

    DOE Patents [OSTI]

    Rauscher, C.

    1987-12-07T23:59:59.000Z

    A photoconductive reflectometer for characterizing semiconductor devices at millimeter wavelength frequencies where a first photoconductive circuit element (PCE) is biased by a direct current voltage source and produces short electrical pulses when excited into conductance by short first laser light pulses. The electrical pulses are electronically conditioned to improve the frequency related amplitude characteristics of the pulses which thereafter propagate along a transmission line to a device under test. Second PCEs are connected along the transmission line to sample the signals on the transmission line when excited into conductance by short second laser light pulses, spaced apart in time a determinable period from the first laser light pulses. Electronic filters connected to each of the second PCEs act as low-pass filters and remove parasitic interference from the sampled signals and output the sampled signals in the form of slowed-motion images of the signals on the transmission line. 4 figs.

  12. Alternative Design Concepts for Multi-Circuit HTS Link Systems

    E-Print Network [OSTI]

    Ballarino, A

    2011-01-01T23:59:59.000Z

    Superconducting cables for power transmission usually contain two conductors for DC application, or three conductors for AC, with high voltage insulation. In contrast, for some applications related to accelerators it is convenient to transfer high currents via superconducting links feeding a number of circuits at relatively low voltage, of the order of a kilovolt, over distances of up to a few hundred meters. For power transmission applications based on cooling via sub-cooled liquid nitrogen, suitable HTS conductors are only available in the form of tape, and a multi-layer variant can be envisaged for the multi-circuit links. However, where cooling to temperatures of the order of 20 K is feasible, MgB2 conductor, available in the form of both tape and wire, can also be envisaged and in the latter case used to assemble round cables. There are, therefore, two distinct topologies - based on the use of wires or tapes - that can be envisaged for use in applications to multi-circuit link systems. In this paper the ...

  13. A DC-DC Converter-Based PEM Fuel Cell System Emulator

    E-Print Network [OSTI]

    Boyer, Edmond

    power supplies. Fuel cell systems are characterized by high costs and complex auxiliary devices still impose some drawbacks: the cost of fuel cell system tests are expensive (e.g., hydrogenA DC-DC Converter-Based PEM Fuel Cell System Emulator Daoud Rezzak, Farid Khoucha, Mohamed

  14. DC's Marble ceiling : urban height and its regulation in Washington, DC

    E-Print Network [OSTI]

    Trueblood, Andrew Tyson

    2009-01-01T23:59:59.000Z

    Washington, DC has a unique urban form that is the result of a century-old law. Through the narrow lens of DC's height limit, I survey a range of topics related to urban height, starting with a review of its history of ...

  15. Wide input range DC-DC converter with digital control scheme

    E-Print Network [OSTI]

    Harfman Todorovic, Maja

    2006-04-12T23:59:59.000Z

    In this thesis analysis and design of a wide input range DC-DC converter is proposed along with a robust power control scheme. The proposed converter and its control is designed to be compatible to a fuel cell power source, which exhibits 2...

  16. A resonant load circuit to develop electrical power transfer of thermionic converters

    SciTech Connect (OSTI)

    Perez, G.; Estrada, C.A.; Jimenez, A.E.

    1998-07-01T23:59:59.000Z

    Low internal impedance of thermionic converters requires a low impedance load in the DC mode to obtain optimal power transfer. An internal resistance near 0.1 W for thermionic converters is common. According to the maximum power theorem [Desoer,1969], a similar magnitude for the resistance load must be fixed. Due to temperature changes, the internal plasma resistance and the resistance of the leads is modified [Houston,1959], for this reason, it is difficult to maintain maximum power transfer to the load. This paper presents a resonant load circuit for thermionic converters in the AC mode, to develop impedance coupling. The circuit employs an electrical transformer and positive feedback; by this way, oscillations are themselves maintained. It is used an electrical circuit model [Perez et al, 1997], to simulate the electrical behavior of the thermionic converter.

  17. Cont. Rot. Rot. DC Cont. Rot. Rot. DC Cont. Rot. Rot. DC Corn Corn Beans Wheat Beans Corn Corn Beans Wheat Beans Corn Corn Beans Wheat Beans

    E-Print Network [OSTI]

    Jackson, Scott A.

    Cont. Rot. Rot. DC Cont. Rot. Rot. DC Cont. Rot. Rot. DC Corn Corn Beans Wheat Beans Corn Corn Beans Wheat Beans Corn Corn Beans Wheat Beans Expected yield per acre2 118 126 39 62 23 149 158 49 70 29

  18. Cont. Rot. Rot. DC Cont. Rot. Rot. DC Cont. Rot. Rot. DC Corn Corn Beans Wheat Beans Corn Corn Beans Wheat Beans Corn Corn Beans Wheat Beans

    E-Print Network [OSTI]

    Cont. Rot. Rot. DC Cont. Rot. Rot. DC Cont. Rot. Rot. DC Corn Corn Beans Wheat Beans Corn Corn Beans Wheat Beans Corn Corn Beans Wheat Beans Expected yield per acre2 119 127 39 62 23 149 159 49 70 29

  19. Counterpulse railgun energy recovery circuit

    DOE Patents [OSTI]

    Honig, E.M.

    1984-09-28T23:59:59.000Z

    The invention presented relates to a high-power pulsing circuit and more particularly to a repetitive pulse inductive energy storage and transfer circuit for an electromagnetic launcher. In an electromagnetic launcher such as a railgun for propelling a projectile at high velocity, a counterpulse energy recovery circuit is employed to transfer stored inductive energy from a source inductor to the railgun inductance to propel the projectile down the railgun. Switching circuitry and an energy transfer capacitor are used to switch the energy back to the source inductor in readiness for a repetitive projectile propelling cycle.

  20. Overpulse railgun energy recovery circuit

    DOE Patents [OSTI]

    Honig, E.M.

    1984-09-28T23:59:59.000Z

    The invention presented relates to a high-power pulsing circuit and more particularly to a repetitive pulse inductive energy storage and transfer circuit for an electromagnetic launcher. In an electromagnetic launcher such as a railgun for propelling a projectile at high velocity, an overpulse energy recovery circuit is employed to transfer stored inductive energy from a source inductor to the railgun inductance to propel the projectile down the railgun. Switching circuitry and an energy transfer capacitor are used to switch the energy back to the source inductor in readiness for a repetitive projectile propelling cycle.

  1. DC switching regulated power supply for driving an inductive load

    DOE Patents [OSTI]

    Dyer, George R. (Norris, TN)

    1986-01-01T23:59:59.000Z

    A power supply for driving an inductive load current from a dc power supply hrough a regulator circuit including a bridge arrangement of diodes and switching transistors controlled by a servo controller which regulates switching in response to the load current to maintain a selected load current. First and second opposite legs of the bridge are formed by first and second parallel-connected transistor arrays, respectively, while the third and fourth legs of the bridge are formed by appropriately connected first and second parallel connected diode arrays, respectively. The regulator may be operated in three "stages" or modes: (1) For current runup in the load, both first and second transistor switch arrays are turned "on" and current is supplied to the load through both transistor arrays. (2) When load current reaches the desired level, the first switch is turned "off", and load current "flywheels" through the second switch array and the fourth leg diode array connecting the second switch array in series with the load. Current is maintained by alternating between modes 1 and 2 at a suitable duty cycle and switching rate set by the controller. (3) Rapid current rundown is accomplished by turning both switch arrays "off", allowing load current to be dumped back into the source through the third and fourth diode arrays connecting the source in series opposition with the load to recover energy from the inductive load. The three operating states are controlled automatically by the controller.

  2. ISCAS 2000 -IEEE InternationalSymposiumon Circuits and Systems, May 28-31,2000, Geneva, Switzerland AN ADAPTIVE OFFSET CANCELLATIONMIXER FOR

    E-Print Network [OSTI]

    Moon, Un-Ku

    -converted signal in the form of a DC offset. Coupling of the LO to the LNA and RF port of the mixer cause static conversion mixer incorporating adaptive offset cancellation. The basic circuit structure is that of a Gilbert cell mixer. Offsets are cancelled by dynamically varying the bias on the loads, which are designed

  3. New Experimental Data in DC745U

    SciTech Connect (OSTI)

    Ortiz-Acosta, Denisse [Los Alamos National Laboratory; Cady, Carl [Los Alamos National Laboratory; Densmore, Crystal [Los Alamos National Laboratory

    2012-06-18T23:59:59.000Z

    The objectives of this project are: (1) study the molecular and mechanical properties of DC745U - (a) DC745U is a silicone elastomer used in several weapons systems, (b) depending on their chemistry and formulation, polymers can be susceptible to damage and failures due to weak chemical linkages and physical interactions, (c) inefficient production processes can generate heterogeneities throughout the material that can contribute negatively to the overall performance and lifetime of the polyer, (d) aging, long-term thermal and radioactive conditions, and mechanical strains can affect the materials network structure and contribute to the degradation of the production; (2) characterization of DC745U materials cured under different conditions to determine possible differences to the polymer structure; and (3) this work is relevant to mission-critical programs and for supporting programmatic work for weapon research.

  4. Hygroscopic Fine Mode Particle Deposition on Electronic Circuits and Resulting Degradation of Circuit Performance: An Experimental Study

    E-Print Network [OSTI]

    Litvak, A.

    2011-01-01T23:59:59.000Z

    electronic components, circuits, and spacing between adjacent conductors continues to get smaller ; degradation of circuit reliability

  5. Thermoelectric DC conductivities from black hole horizons

    E-Print Network [OSTI]

    Aristomenis Donos; Jerome P. Gauntlett

    2014-10-14T23:59:59.000Z

    An analytic expression for the DC electrical conductivity in terms of black hole horizon data was recently obtained for a class of holographic black holes exhibiting momentum dissipation. We generalise this result to obtain analogous expressions for the DC thermoelectric and thermal conductivities. We illustrate our results using some holographic Q-lattice black holes as well as for some black holes with linear massless axions, in both $D=4$ and $D=5$ bulk spacetime dimensions, which include both spatially isotropic and anisotropic examples. We show that some recently constructed ground states of holographic Q-lattices, which can be either electrically insulating or metallic, are all thermal insulators.

  6. Tunable circuit for tunable capacitor devices

    SciTech Connect (OSTI)

    Rivkina, Tatiana; Ginley, David S.

    2006-09-19T23:59:59.000Z

    A tunable circuit (10) for a capacitively tunable capacitor device (12) is provided. The tunable circuit (10) comprises a tunable circuit element (14) and a non-tunable dielectric element (16) coupled to the tunable circuit element (16). A tunable capacitor device (12) and a method for increasing the figure of merit in a tunable capacitor device (12) are also provided.

  7. Electronic circuit implementation of chaos synchronization

    E-Print Network [OSTI]

    Ravi Ranjan; Shivshankar Mishra; Suneel Madhekar

    2012-07-20T23:59:59.000Z

    In this paper, an electronic circuit implementation of a robustly chaotic two-dimensional map is presented. Two such electronic circuits are realized. One of the circuits is configured as the driver and the other circuit is configured as the driven system. Synchronization of chaos between the driver and the driven system is demonstrated.

  8. NPTEL Syllabus Basic Electrical Circuits -Video course

    E-Print Network [OSTI]

    Krishnapura, Nagendra

    with an introduction to basic linear elements used in electrical circuits. Mesh and node analysis for systematic analysis of large circuits will be studied. Fundamental circuit theorems and their use in analysis steady state analysis for simple analysis of such circuits will be studied. The concepts of power

  9. Reverse engineering of integrated circuits

    DOE Patents [OSTI]

    Chisholm, Gregory H. (Shorewood, IL); Eckmann, Steven T. (Colorado Springs, CO); Lain, Christopher M. (Pittsburgh, PA); Veroff, Robert L. (Albuquerque, NM)

    2003-01-01T23:59:59.000Z

    Software and a method therein to analyze circuits. The software comprises several tools, each of which perform particular functions in the Reverse Engineering process. The analyst, through a standard interface, directs each tool to the portion of the task to which it is most well suited, rendering previously intractable problems solvable. The tools are generally used iteratively to produce a successively more abstract picture of a circuit, about which incomplete a priori knowledge exists.

  10. achyrocline satureioides dc: Topics by E-print Network

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

    and DC, microgrid, with its definition as a local grid that comprises distributed generation, energy storage systems to the frequency in the AC bulk grid, the DC voltage in the...

  11. DC Students Flex Their Mental Muscles in Regional Science Bowl...

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

    DC Students Flex Their Mental Muscles in Regional Science Bowl Competition DC Students Flex Their Mental Muscles in Regional Science Bowl Competition February 23, 2015 - 3:12pm...

  12. FEDERAL COMMUNICATIONS COMMISSION Washington, DC 20554

    E-Print Network [OSTI]

    Bove Jr., V. Michael

    FCC 96­207 Before the FEDERAL COMMUNICATIONS COMMISSION Washington, DC 20554 In the Matter to the advancement of digital television and related technologies by the Federal Communications Commission, its 617­253­0334, fax 617­258­6264 vmb@media.mit.edu #12; EXECUTIVE SUMMARY The Federal Communications

  13. Energy Training Session for DC Elementary School Teachers

    Broader source: Energy.gov [DOE]

    Are you an elementary school teacher in Washington, DC, looking for creative ideas to introduce energy curriculum to your students?

  14. Aalborg Universitet Hierarchical Control for Multiple DC Microgrids Clusters

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    Aalborg Universitet Hierarchical Control for Multiple DC Microgrids Clusters Shafiee, Qobad Control for Multiple DC Microgrids Clusters. I E E E Transactions on Energy Conversion. General rights, J. C. Vasquez, and J. M. Guerrero, "Hierarchical Control for Multiple DC-Microgrids Clusters," IEEE

  15. Transportation YOU 2013 DC Youth Summit WTS Transportation YOU

    E-Print Network [OSTI]

    Minnesota, University of

    Transportation YOU 2013 DC Youth Summit WTS Transportation YOU CTS Research Conference May 21, 2014 Lisa Rasmussen, WTS / Kimley-Horn and Associates, Inc #12;Transportation YOU 2013 DC Youth SummitTransportation YOU 2013 DC Youth Summit Agenda What is Transportation YOU? Transportation YOU ­ WTS Local Chapter

  16. D.C. Water Resources Research Center Annual Technical Report

    E-Print Network [OSTI]

    D.C. Water Resources Research Center Annual Technical Report FY 2007 D.C. Water Resources Research of the District of Columbia (DC) Water Resources Research Institute (the Institute) for the period of March 1 relevant water resources research results and transfer information to assist policy makers and residents

  17. Low Power DC-DC Converters and a Low Quiescent Power High PSRR Class-D Audio Amplifier

    E-Print Network [OSTI]

    Torres, Joselyn

    2013-12-03T23:59:59.000Z

    High-performance DC-DC voltage converters and high-efficient class-D audio amplifiers are required to extend battery life and reduce cost in portable electronics. This dissertation focuses on new system architectures and design techniques...

  18. Low Power DC-DC Converters and a Low Quiescent Power High PSRR Class-D Audio Amplifier 

    E-Print Network [OSTI]

    Torres, Joselyn

    2013-12-03T23:59:59.000Z

    High-performance DC-DC voltage converters and high-efficient class-D audio amplifiers are required to extend battery life and reduce cost in portable electronics. This dissertation focuses on new system architectures and design techniques...

  19. Measurement of harmonic currents and evaluation of the dc filter performance of the New England - Hydro-Quebec Phase I HVDC Project

    SciTech Connect (OSTI)

    Garrity, T.F.; Hassan, I.D.; Donahue, J.A.

    1989-01-01T23:59:59.000Z

    Measurements of harmonic currents in the New England-Hydro-Quebec Phase I HVDC Project de transmission line are presented in this paper. Measurements were conducted to determine the cause of increased telephone interference and to evaluate the dc filter performance. The measurements revealed unexpected high levels of 3-pulse harmonic currents in the dc pole conductors. The cause is attributed to imbalances within the 6-pulse bridges caused by the converter transformer and valve stray capacitances to ground. The conventional model of the converter power circuit used as the basis for the dc filter design does not reproduce the measured 3-pulse harmonics. Modification to this model is required to account for the effect of the converter transformer and valve stray capacitances to ground.

  20. Nuclear sensor signal processing circuit

    DOE Patents [OSTI]

    Kallenbach, Gene A. (Bosque Farms, NM); Noda, Frank T. (Albuquerque, NM); Mitchell, Dean J. (Tijeras, NM); Etzkin, Joshua L. (Albuquerque, NM)

    2007-02-20T23:59:59.000Z

    An apparatus and method are disclosed for a compact and temperature-insensitive nuclear sensor that can be calibrated with a non-hazardous radioactive sample. The nuclear sensor includes a gamma ray sensor that generates tail pulses from radioactive samples. An analog conditioning circuit conditions the tail-pulse signals from the gamma ray sensor, and a tail-pulse simulator circuit generates a plurality of simulated tail-pulse signals. A computer system processes the tail pulses from the gamma ray sensor and the simulated tail pulses from the tail-pulse simulator circuit. The nuclear sensor is calibrated under the control of the computer. The offset is adjusted using the simulated tail pulses. Since the offset is set to zero or near zero, the sensor gain can be adjusted with a non-hazardous radioactive source such as, for example, naturally occurring radiation and potassium chloride.

  1. Vertically Integrated Circuits at Fermilab

    SciTech Connect (OSTI)

    Deptuch, Grzegorz; Demarteau, Marcel; Hoff, James; Lipton, Ronald; Shenai, Alpana; Trimpl, Marcel; Yarema, Raymond; Zimmerman, Tom; /Fermilab

    2009-01-01T23:59:59.000Z

    The exploration of the vertically integrated circuits, also commonly known as 3D-IC technology, for applications in radiation detection started at Fermilab in 2006. This paper examines the opportunities that vertical integration offers by looking at various 3D designs that have been completed by Fermilab. The emphasis is on opportunities that are presented by through silicon vias (TSV), wafer and circuit thinning and finally fusion bonding techniques to replace conventional bump bonding. Early work by Fermilab has led to an international consortium for the development of 3D-IC circuits for High Energy Physics. The consortium has submitted over 25 different designs for the Fermilab organized MPW run organized for the first time.

  2. Fermionic Models with Superconducting Circuits

    E-Print Network [OSTI]

    U. Las Heras; L. García-Álvarez; A. Mezzacapo; E. Solano; L. Lamata

    2015-03-31T23:59:59.000Z

    We propose a method for the efficient quantum simulation of fermionic systems with superconducting circuits. It consists in the suitable use of Jordan-Wigner mapping, Trotter decomposition, and multiqubit gates, be with the use of a quantum bus or direct capacitive couplings. We apply our method to the paradigmatic cases of 1D and 2D Fermi-Hubbard models, involving couplings with nearest and next-nearest neighbours. Furthermore, we propose an optimal architecture for this model and discuss the benchmarking of the simulations in realistic circuit quantum electrodynamics setups.

  3. Fermionic Models with Superconducting Circuits

    E-Print Network [OSTI]

    U. Las Heras; L. García-Álvarez; A. Mezzacapo; E. Solano; L. Lamata

    2014-11-10T23:59:59.000Z

    We propose a method for the efficient quantum simulation of fermionic systems with superconducting circuits. It consists in the suitable use of Jordan-Wigner mapping, Trotter decomposition, and multiqubit gates, be with the use of a quantum bus or direct capacitive couplings. We apply our method to the paradigmatic cases of 1D and 2D Fermi-Hubbard models, involving couplings with nearest and next-nearest neighbours. Furthermore, we propose an optimal architecture for this model and discuss the benchmarking of the simulations in realistic circuit quantum electrodynamics setups.

  4. New leading/trailing edge modulation strategies for two-stage AC/DC PFC adapters to reduce DC-link capacitor ripple current 

    E-Print Network [OSTI]

    Sun, Jing

    2007-09-17T23:59:59.000Z

    AC/DC adapters mostly employ two-stage topology: Power Factor Correction (PFC) pre-regulation stage followed by an isolated DC/DC converter stage. Low power AC/DC adapters require a small size to be competitive. Among their components, the bulk DC...

  5. DC side filters for multiterminal HVDC systems

    SciTech Connect (OSTI)

    Shore, N.L.; Adamson, K.; Bard, P. [and others] [and others

    1996-10-01T23:59:59.000Z

    Multiterminal HVDC systems present challenges in the specification and design of suitable dc side filtering. This document examines the existing experience and addresses the particular technical problems posed by multiterminal systems. The filtering requirements of small taps are discussed, as is the potential use of active filters. Aspects of calculation and design are considered and recommendations made to guide the planners and designers of future multiterminal schemes.

  6. Post regulation circuit with energy storage

    DOE Patents [OSTI]

    Ball, Don G. (Livermore, CA); Birx, Daniel L. (Oakley, CA); Cook, Edward G. (Livermore, CA)

    1992-01-01T23:59:59.000Z

    A charge regulation circuit provides regulation of an unregulated voltage supply and provides energy storage. The charge regulation circuit according to the present invention provides energy storage without unnecessary dissipation of energy through a resistor as in prior art approaches.

  7. Circuit Optimization Using Efficient Parallel Pattern Search

    E-Print Network [OSTI]

    Narasimhan, Srinath S.

    2011-08-08T23:59:59.000Z

    Circuit optimization is extremely important in order to design today's high performance integrated circuits. As systems become more and more complex, traditional optimization techniques are no longer viable due to the complex and simulation...

  8. 20Engineering Gene Circuits: Foundations

    E-Print Network [OSTI]

    You, Lingchong

    ................................................................. 20-363 20.2 Designing Gene Circuits............................................. 20-364 Modeling characterized as ``robustness.'' Based on extensive studies over the last several decades, much engineered switches [11­14], oscillators [15,16], logic gates [17­19], metabolic control [20], reengineered

  9. ECE 2100 Circuit Analysis NAME: ________________________________________________

    E-Print Network [OSTI]

    Miller, Damon A.

    ECE 2100 Circuit Analysis Fall 2011 Exam #1 NAME Schematics drawn using LTspice IV (linear.com). Some problems might be adapted from the course text Schematics drawn using LTspice IV (linear.com). Some problems might be adapted from the course text

  10. Analysis and design of reliable nanometer circuits

    E-Print Network [OSTI]

    Zhao, Chong

    2007-01-01T23:59:59.000Z

    methodology is the key first step toward design of low-cost, highly robust nanometer circuit systems. Soft

  11. Circuit Quantum Electrodynamics with Electrons on Helium

    E-Print Network [OSTI]

    Circuit Quantum Electrodynamics with Electrons on Helium A Dissertation Presented to the Faculty Fragner All rights reserved. ii #12;Abstract Circuit Quantum Electrodynamics with Electrons on Helium helium. Such a system represents a solid-state, electrical circuit analog of atomic cavity QED in which

  12. Voltage, energy and power in electric circuits

    E-Print Network [OSTI]

    Berzins, M.

    Voltage, energy and power in electric circuits Science teaching unit #12;Disclaimer The Department-2008DVD-EN Voltage, energy and power in electric circuits #12;#12;© Crown copyright 2008 1The National Strategies | Secondary Voltage, energy and power in electric circuits 00094-2008DVD-EN Contents Voltage

  13. Impedance matching and DC-DC converter designs for tunable radio frequency based mobile telecommunication systems 

    E-Print Network [OSTI]

    Wong, Yan Chiew

    2014-06-30T23:59:59.000Z

    Tunability and adaptability for radio frequency (RF) front-ends are highly desirable because they not only enhance functionality and performance but also reduce the circuit size and cost. This thesis presents a number ...

  14. access circuit design: Topics by E-print Network

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

    7 Multilayer Ceramic Integrated Circuits (MCICs) Technology and Passive Circuit Design Computer Technologies and Information Sciences Websites Summary: Multilayer Ceramic...

  15. A High Power Density DC-DC Converter for Distributed PV Architectures

    SciTech Connect (OSTI)

    Mohammed S. Agamy; Song Chi; Ahmed Elasser; Maja Harfman-Todorovic; Yan Jiang; Frank Mueller; Fengfeng Tao

    2012-06-01T23:59:59.000Z

    In order to maximize solar energy harvesting capabilities, power converters have to be designed for high efficiency and good MPPT and voltage/current performance. When many converters are used in distributed systems, power density also becomes an important factor as it allows for simpler system integration. In this paper a high power density string dc-dc converter suitable for distributed medium to large scale PV installation is presented. A simple partial power processing topology, implemented with all silicon carbide devices provides high efficiency as well as high power density. A 3.5kW, 100kHz converter is designed and tested to verify the proposed methods.

  16. DC-DC Converter Topology Assessment for Large Scale Distributed Photovoltaic Plant Architectures

    SciTech Connect (OSTI)

    Mohammed S. Agamy; Maja Harfman-Todorovic; Ahmed Elasser; Juan A. Sabate; Robert L. Steigerwald; Yan Jiang; Somasundaram Essakiappan

    2011-07-01T23:59:59.000Z

    Distributed photovoltaic (PV) plant architectures are emerging as a replacement for the classical central inverter based systems. However, power converters of smaller ratings may have a negative impact on system efficiency, reliability and cost. Therefore, it is necessary to design converters with very high efficiency and simpler topologies in order not to offset the benefits gained by using distributed PV systems. In this paper an evaluation of the selection criteria for dc-dc converters for distributed PV systems is performed; this evaluation includes efficiency, simplicity of design, reliability and cost. Based on this evaluation, recommendations can be made as to which class of converters is best fit for this application.

  17. 1166 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 40, NO. 5, MAY 2005 Design Analysis and Circuit Enhancements for

    E-Print Network [OSTI]

    Long, Stephen I.

    1166 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 40, NO. 5, MAY 2005 Design Analysis and Circuit from the layout in an analysis, see [6]. A. Open Circuit Time Constants The method of open circuit time finds exactly the value of for a linear circuit (corre- sponding to the dominant pole in the circuit

  18. DC Breakdown Experiments with Iridium Cathode

    E-Print Network [OSTI]

    Profatilova, Iaroslava; Korsback, Anders; Muranaka, Tomoko; Wuensch, Walter

    2015-01-01T23:59:59.000Z

    Electrical breakdown occurring in rf accelerating structures is one of the major disruptions of the accelerated beam in CLIC. At CERN, as complements to rf facilities, DC-spark systems have been used to study breakdown properties of many candidate materials for making rf components. In this note, measurements of conditioning speed, breakdown field and field enhancement factor of iridium are presented comparing with previously tested materials. The average breakdown field after conditioning reached 238 MV/m, which places iridium next to copper. By comparison with results and properties of other metals, the low breakdown field of iridium could be explained by its face-centred-cubic crystal structure.

  19. DC Survey 2013 | National Nuclear Security Administration

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisitingContract Management Fermi Site OfficeCoursePublicCurrentCurtis110 1 ofDC

  20. User:Dc | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTri Global Energy LLCEnergy) RedirectCwebber Jump to: navigation,DbowersDc

  1. Dc's blog | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model,DOE Facility Database DataDatatechnicNew Jersey: Energy ResourcesDc's blog Home

  2. Washington DC | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit withTianlin BaxinUmweltVillageGraph HomeWarana Group of CooperativesDC Home

  3. High Temperature, Buried Permanent Magnet, Brushless DC Motor

    E-Print Network [OSTI]

    Zhang, Zhengxin

    2010-10-12T23:59:59.000Z

    Circuit Model Predictions of the motor performance are accomplished with a closed loop electric circuit incorporating the motor. The circuit is broken down into three sub-circuits which are the equivalent generator as motor rotating, the coil pair...,Kang, Jungu Lee, Zhiyang Wang and others who worked with me in Vibration Control and Electrormechanics Laboratory. I also would like to thank Dr. Jinfang Liu and Dr. Heeju Choi at Electron Energy Corporation who constantly support our work. Finally, thanks...

  4. Creating dynamic equivalent PV circuit models with impedance spectroscopy for arc-fault modeling.

    SciTech Connect (OSTI)

    Johnson, Jay Dean; Kuszmaul, Scott S.; Strauch, Jason E.; Schoenwald, David Alan

    2011-06-01T23:59:59.000Z

    Article 690.11 in the 2011 National Electrical Code{reg_sign} (NEC{reg_sign}) requires new photovoltaic (PV) systems on or penetrating a building to include a listed arc fault protection device. Currently there is little experimental or empirical research into the behavior of the arcing frequencies through PV components despite the potential for modules and other PV components to filter or attenuate arcing signatures that could render the arc detector ineffective. To model AC arcing signal propagation along PV strings, the well-studied DC diode models were found to inadequately capture the behavior of high frequency arcing signals. Instead dynamic equivalent circuit models of PV modules were required to describe the impedance for alternating currents in modules. The nonlinearities present in PV cells resulting from irradiance, temperature, frequency, and bias voltage variations make modeling these systems challenging. Linearized dynamic equivalent circuits were created for multiple PV module manufacturers and module technologies. The equivalent resistances and capacitances for the modules were determined using impedance spectroscopy with no bias voltage and no irradiance. The equivalent circuit model was employed to evaluate modules having irradiance conditions that could not be measured directly with the instrumentation. Although there was a wide range of circuit component values, the complex impedance model does not predict filtering of arc fault frequencies in PV strings for any irradiance level. Experimental results with no irradiance agree with the model and show nearly no attenuation for 1 Hz to 100 kHz input frequencies.

  5. XL-DC/Mark V Options You can customize the XL-DC and Mark V

    E-Print Network [OSTI]

    Berns, Hans-Gerd

    administrator with the NTP Time Server Protocol, network status, and statistics. This feature implements SNMP. XL-DC Mark V Network Time Server Telecommunications Interface Frequency Measurement STD Time Interface Low Phase Noise Output Network Interface Loss of Lock Alarm STD Programmable Pulse Output

  6. A Reachability-Based Method for Large-Signal Behavior Verification of DC-DC Converters

    E-Print Network [OSTI]

    Liberzon, Daniel

    -loop, large-signal system behavior verification, and iv) switching detail modeling. In open-loop, large´inguez-Garc´ia, Member, IEEE Abstract--A method for large-signal behavior verification of power electronics DC behavior verification, lengthy time-domain simula- tions are conducted to analyze the system response

  7. Development of a 55 kW 3X DC-DC Converter for HEV Systems

    E-Print Network [OSTI]

    Tolbert, Leon M.

    converter and a traction motor to drive the vehicle. In most commercial HEV systems, the power converter one of the hottest parts in the system. Hence, with the trend of higher coolant temperatures, those-dc converter and the continuous control of the modulation index of the inverter, it is sufficient to operate

  8. Energy Challenge Two: The WeatherizeDC Campaign | Department...

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

    economic and environmental justice by creating clean energy career opportunities for people who need them most. The DC Project applies cutting-edge organizing tools and tactics...

  9. assisted dc magnetron: Topics by E-print Network

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

    resistivity exceeding 1020 .cm 2. However, native defects (most Mekki, Abdelkarim 23 Optimization of DC reactive magnetron sputtering deposition process for efficient YSZ...

  10. DC Bus Capacitor Manufacturing Facility for Electric Drive Vehicles...

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

    0 DOE Vehicle Technologies and Hydrogen Programs Annual Merit Review and Peer Evaluation Meeting, June 7-11, 2010 -- Washington D.C. apearravt028boan2010...

  11. average current dc: Topics by E-print Network

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

    ??Permanent magnet Brushless DC motor drives are being employed in newlinemany variable speed applications due to their high efficiency, silent operation, newlinecompact size,...

  12. ac to dc converters: Topics by E-print Network

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

    to use solid state Inverters(DC to AC converters) to have a variable voltage, fixed or variable frequency power source available for industrial applications. With advancements...

  13. PHOTOVOLTAIC DC ARC FAULT DETECTOR TESTING AT SANDIA NATIONAL

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

    PHOTOVOLTAIC DC ARC FAULT DETECTOR TESTING AT SANDIA NATIONAL LABORATORIES Jay Johnson 1 , Birger Pahl 2 , Charles Luebke 2 , Tom Pier 2 , Theodore Miller 3 , Jason Strauch 1 ,...

  14. Identifying semiconductors by d.c. ionization conductivity

    E-Print Network [OSTI]

    2006-01-01T23:59:59.000Z

    expected from high-Z semiconductor detectors? ,” IEEE Transand binary compound semiconductors and insulators,” J PhysIdentifying Semiconductors by D.C. Ionization Conductivity

  15. DC Resistivity Survey (Wenner Array) At Mt Princeton Hot Springs...

    Open Energy Info (EERE)

    2008 - 2010 Usefulness useful DOE-funding Unknown Exploration Basis Determination of groundwater flux patterns Notes Researchers measured DC resistivity and produced 12 resistivity...

  16. Photoconductive circuit element pulse generator

    DOE Patents [OSTI]

    Rauscher, Christen (Alexandria, VA)

    1989-01-01T23:59:59.000Z

    A pulse generator for characterizing semiconductor devices at millimeter wavelength frequencies where a photoconductive circuit element (PCE) is biased by a direct current voltage source and produces short electrical pulses when excited into conductance by short laser light pulses. The electrical pulses are electronically conditioned to improve the frequency related amplitude characteristics of the pulses which thereafter propagate along a transmission line to a device under test.

  17. Monolithic readout circuits for RHIC

    SciTech Connect (OSTI)

    O`Connor, P.; Harder, J. [Brookhaven National Laboratory, Upton, NY (United States)

    1991-12-31T23:59:59.000Z

    Several CMOS ASICs have been developed for a proposed RHIC experiment. This paper discusses why ASIC implementation was chosen for certain functions, circuit specifications and the design techniques used to meet them, and results of simulations and early prototypes. By working closely together from an early stage in the planning process, in-house ASIC designers and detector and data acquisition experimenters can achieve optimal use of this important technology.

  18. Counterpulse railgun energy recovery circuit

    DOE Patents [OSTI]

    Honig, Emanuel M. (Los Alamos, NM)

    1986-01-01T23:59:59.000Z

    In an electromagnetic launcher such as a railgun for propelling a projectile at high velocity, a counterpulse energy recovery circuit is employed to transfer stored inductive energy from a source inductor to the railgun inductance to propel the projectile down the railgun. Switching circuitry and an energy transfer capacitor are used to switch the energy back to the source inductor in readiness for a repetitive projectile propelling cycle.

  19. Overpulse railgun energy recovery circuit

    DOE Patents [OSTI]

    Honig, Emanuel M. (Los Alamos, NM)

    1989-01-01T23:59:59.000Z

    In an electromagnetic launcher such as a railgun for propelling a projectile at high velocity, an overpulse energy recovery circuit is employed to transfer stored inductive energy from a source inductor to the railgun inductance to propel the projectile down the railgun. Switching circuitry and an energy transfer capacitor are used to switch the energy back to the source inductor in readiness for a repetitive projectile propelling cycle.

  20. Online circuit breaker monitoring system

    E-Print Network [OSTI]

    Djekic, Zarko

    2008-10-10T23:59:59.000Z

    of Department, Costas N. Georghiades December 2007 Major Subject: Electrical Engineering iii ABSTRACT Online Circuit Breaker Monitoring System. (December 2007) Zarko Djekic, B.S., University of Novi Sad, Serbia Chair of Advisory..., this work would not be possible. I would also like to thank the members of my committee, Dr. Chanan Singh, Dr. Sunil Khatri and Dr. William Lively for their advice and patience. Special thanks also go to Center Point Energy personnel Don Sevcik and John...

  1. Online circuit breaker monitoring system

    E-Print Network [OSTI]

    Djekic, Zarko

    2009-05-15T23:59:59.000Z

    of Department, Costas N. Georghiades December 2007 Major Subject: Electrical Engineering iii ABSTRACT Online Circuit Breaker Monitoring System. (December 2007) Zarko Djekic, B.S., University of Novi Sad, Serbia Chair of Advisory..., this work would not be possible. I would also like to thank the members of my committee, Dr. Chanan Singh, Dr. Sunil Khatri and Dr. William Lively for their advice and patience. Special thanks also go to Center Point Energy personnel Don Sevcik and John...

  2. Refinery Outages: Fall 2014

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghurajiConventionalMississippi"site.1 Relative Standard Errors for TableCORPORATION /Product:

  3. Scheduled System Outages

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItemResearch > TheNuclearHomeland andEffectsScanning/TransmissionScheduled System

  4. An in-depth noise model for giant magnetoresistance current sensors for circuit design and complementary metal–oxide–semiconductor integration

    SciTech Connect (OSTI)

    Roldán, A., E-mail: amroldan@ugr.es; Roldán, J. B. [Department of Electronics and Computer Technology, University of Granada (Spain); Reig, C. [Department of Electronic Engineering, University of Valencia (Spain); Cardoso, S. [INESC-MN and IN, Rua Alves Redol 9, 1000-029 Lisbon (Portugal); Instituto Superior Técnico (IST), Av. Rovisco Pais, 1000-029 Lisbon (Portugal); Cardoso, F. [INESC-MN and IN, Rua Alves Redol 9, 1000-029 Lisbon (Portugal); Ferreira, R. [International Iberian Nanotechnology Laboratory, Braga (Portugal); Freitas, P. P. [INESC-MN and IN, Rua Alves Redol 9, 1000-029 Lisbon (Portugal); International Iberian Nanotechnology Laboratory, Braga (Portugal)

    2014-05-07T23:59:59.000Z

    Full instrumentation bridges based on spin valve of giant magnetoresistance and magnetic tunnel junction devices have been microfabricated and experimentally characterized from the DC and noise viewpoint. A more realistic model of these devices was obtained in this work, an electrical and thermal model previously developed have been improved in such a way that noise effects are also included. We have implemented the model in a circuit simulator and reproduced the experimental measurements accurately. This provides a more realistic and complete tool for circuit design where magnetoresistive elements are combined with well-known complementary metal–oxide–semiconductor modules.

  5. Design and analysis of a zero-voltage switching scheme for a dc- to-dc converter 

    E-Print Network [OSTI]

    Arun, G.

    1992-01-01T23:59:59.000Z

    DESIGN AND ANALYSIS OF A ZERO-VOLTAGE SSVITCHING SCFIE'. tIE FOR A DC-TO-DC CONVERTER A Thesis by G. ARUN Submitted to the Office of Graduate Studies of Texas ARM 1. niversity in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 1992 Major Subject: Electrical Engineering DESIGN AND ANALYSIS OE A ZERO-VOLTAGE SWITCHING SCHEME I'OR A DC-TO-DC CONVERTER A Thesis by G. AR(tN Approved as to style and content by: P. Enjeti (Chair of Cornrnitteel C...

  6. Low noise charge sensitive preamplifier DC stabilized without a physical resistor

    DOE Patents [OSTI]

    Bertuccio, Giuseppe (Brianza, IT); Rehak, Pavel (Patchogue, NY); Xi, Deming (Beijing, CN)

    1994-09-13T23:59:59.000Z

    The invention is a novel charge sensitive preamplifier (CSP) which has no resistor in parallel with the feedback capacitor. No resetting circuit is required to discharge the feedback capacitor. The DC stabilization of the preamplifier is obtained by means of a second feedback loop between the preamplifier output and the common base transistor of the input cascode. The input transistor of the preamplifier is a Junction Field Transistor (JFET) with the gate-source junction forward biased. The detector leakage current flows into this junction. This invention is concerned with a new circuit configuration for a charge sensitive preamplifier and a novel use of the input Field Effect Transistor of the CSP itself. In particular this invention, in addition to eliminating the feedback resistor, eliminates the need for external devices between the detector and the preamplifier, and it eliminates the need for external circuitry to sense the output voltage and reset the CSP. Furthermore, the noise level of the novel CSP is very low, comparable with the performance achieved with other solutions. Experimental tests prove that this configuration for the charge sensitive preamplifier permits an excellent noise performance at temperatures including room temperature. An equivalent noise charge of less than 20 electrons r.m.s. has been measured at room temperature by using a commercial JFET as input device of the preamplifier.

  7. Low noise charge sensitive preamplifier DC stabilized without a physical resistor

    DOE Patents [OSTI]

    Bertuccio, G.; Rehak, P.; Xi, D.

    1994-09-13T23:59:59.000Z

    The invention is a novel charge sensitive preamplifier (CSP) which has no resistor in parallel with the feedback capacitor. No resetting circuit is required to discharge the feedback capacitor. The DC stabilization of the preamplifier is obtained by means of a second feedback loop between the preamplifier output and the common base transistor of the input cascode. The input transistor of the preamplifier is a Junction Field Transistor (JFET) with the gate-source junction forward biased. The detector leakage current flows into this junction. This invention is concerned with a new circuit configuration for a charge sensitive preamplifier and a novel use of the input Field Effect Transistor of the CSP itself. In particular this invention, in addition to eliminating the feedback resistor, eliminates the need for external devices between the detector and the preamplifier, and it eliminates the need for external circuitry to sense the output voltage and reset the CSP. Furthermore, the noise level of the novel CSP is very low, comparable with the performance achieved with other solutions. Experimental tests prove that this configuration for the charge sensitive preamplifier permits an excellent noise performance at temperatures including room temperature. An equivalent noise charge of less than 20 electrons r.m.s. has been measured at room temperature by using a commercial JFET as input device of the preamplifier. 6 figs.

  8. Modeling and simulation, and their validation of three-phase transformers with three legs under DC bias

    SciTech Connect (OSTI)

    Fuchs, E.F.; You, Y.; Roesler, D.J. [Univ. of Colorado, Boulder, CO (United States)] [Univ. of Colorado, Boulder, CO (United States)

    1999-04-01T23:59:59.000Z

    This paper proposes a new model for three-phase transformers with three legs with and without tank under DC bias based on electric and magnetic circuit theory. For the calculation of the nonsinusoidal no-load currents, a combination of time and frequency domains is used. The analysis shows that (1) asymmetric three-phase transformers with three legs generate magnetizing currents with triplen harmonics not being of the zero-sequence type. (2) The wave shapes of the three magnetizing currents of (asymmetric) transformers are dependent on the phase sequence. (3) The magnetic history of transformer magnetization -- due to residual magnetization and hysteresis of the tank -- cannot be ignored if a DC bias is present and the magnetic influence of the tank is relatively strong, e.g., for oil-cooled transformers. (4) Symmetric three-phase transformers with three legs generate no-load currents without triplen harmonics. (5) The effects of DC bias currents (e.g., reactive power demand, harmonic distortion) can be suppressed employing symmetric three-phase transformers with three legs including tank. Measurements corroborate computational results; thus this nonlinear model is valid and accurate.

  9. SoC Energy Savings = Reduce+Reuse+Recycle: A Case Study Using a 660MHz DC-DC Converter with Integrated Output Filter

    E-Print Network [OSTI]

    Lemieux, Guy

    SoC Energy Savings = Reduce+Reuse+Recycle: A Case Study Using a 660MHz DC-DC Converter, mehdia, samad, prp, shahriar } @ ece.ubc.ca Abstract ­ This paper advocates `reduce, reuse, recycle to emphasize reuse and recycling as well. We design a DC-DC buck converter to demonstrate the 3 techniques

  10. Dynamic microscopic theory of fusion using DC-TDHF

    SciTech Connect (OSTI)

    Umar, A. S.; Oberacker, V. E.; Keser, R.; Maruhn, J. A.; Reinhard, P.-G. [Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235 (United States); RTE University, Science and Arts Faculty, Department of Physics, 53100, Rize (Turkey); Institut fuer Theoretische Physik, Goethe-Universitaet, D-60438 Frankfurt am Main (Germany); Institut fur Theoretische Physik, Universitat Erlangen, D-91054 Erlangen (Germany)

    2012-10-20T23:59:59.000Z

    The density-constrained time-dependent Hartree-Fock (DC-TDHF) theory is a fully microscopic approach for calculating heavy-ion interaction potentials and fusion cross sections below and above the fusion barrier. We discuss recent applications of DC-TDHF method to fusion of light and heavy systems.

  11. ELECTROMAGNETIC RADIATION FROM A STRONG DC ELECTRIC FIELD

    E-Print Network [OSTI]

    Guedel, Manuel

    ELECTROMAGNETIC RADIATION FROM A STRONG DC ELECTRIC FIELD Manuel G¨udel 1 and Donat G. Wentzel 2 1 accelerated by a strong dc electric field show not only very efficient generation of beam waves but also emission of o­mode radiation. We present a set of particle simulations for which we study the behavior

  12. Read-out electronics for DC squid magnetic measurements

    DOE Patents [OSTI]

    Ganther, Jr., Kenneth R. (Olathe, KS); Snapp, Lowell D. (Independence, MO)

    2002-01-01T23:59:59.000Z

    Read-out electronics for DC SQUID sensor systems, the read-out electronics incorporating low Johnson noise radio-frequency flux-locked loop circuitry and digital signal processing algorithms in order to improve upon the prior art by a factor of at least ten, thereby alleviating problems caused by magnetic interference when operating DC SQUID sensor systems in magnetically unshielded environments.

  13. National Small Business Federal Contracting Summit-DC Fall Conference

    Broader source: Energy.gov [DOE]

    The 2014 National Small Business Federal Contracting Summit - DC Fall Conference is presented jointly by the National Association of Small Business Contractors (the Supplier Council of The American Small Business Chamber of Commerce) and the U.S. Women's Chamber of Commerce in Washington DC.

  14. Historical Material Analysis of DC745U Pressure Pads

    SciTech Connect (OSTI)

    Ortiz-Acosta, Denisse [Los Alamos National Laboratory

    2012-07-30T23:59:59.000Z

    As part of the Enhance Surveillance mission, it is the goal to provide suitable lifetime assessment of stockpile materials. This report is an accumulation of historical publication on the DC745U material and their findings. It is the intention that the B61 LEP program uses this collection of data to further develop their understanding and potential areas of study. DC745U is a commercially available silicone elastomer consisting of dimethyl, methyl-phenyl, and methyl-vinyl siloxane repeat units. Originally, this material was manufactured by Dow Corning as Silastic{reg_sign} DC745U at their manufacturing facility in Kendallville, IN. Recently, Dow Corning shifted this material to the Xiameter{reg_sign} brand product line. Currently, DC745U is available through Xiameter{reg_sign} or Dow Corning's distributor R. D. Abbott Company. DC745U is cured using 0.5 wt% vinyl-specific peroxide curing agent known as Luperox 101 or Varox DBPH-50. This silicone elastomer is used in numerous parts, including two major components (outer pressure pads and aft cap support) in the W80 and as pressure pads on the B61. DC745U is a proprietary formulation, thus Dow Corning provides limited information on its composition and properties. Based on past experience with Dow Corning, DC745U is at risk of formulation changes without notification to the costumer. A formulation change for DC745U may have a significant impact because the network structure is a key variable in determining material properties. The purpose of this report is to provide an overview of historical DC745U studies and identify gaps that need to be addressed in future work. Some of the previous studies include the following: 1. Spectroscopic characterization of raw gum stock. 2. Spectroscopic, thermal, and mechanical studies on cured DC745U. 3. Nuclear Magnetic Resonance (NMR) and solvent swelling studies on DC745U with different crosslink densities. 4. NMR, solvent swelling, thermal, and mechanical studies on thermally aged DC745U. 5. NMR, solvent swelling, thermal, and mechanical studies on radiolytically aged DC745U. Each area is reviewed and further work is suggested to improve our understanding of DC745U for systems engineering, surveillance, aging assessments, and lifetime assessment.

  15. Monitoring transients in low inductance circuits

    DOE Patents [OSTI]

    Guilford, R.P.; Rosborough, J.R.

    1985-10-21T23:59:59.000Z

    The instant invention relates to methods of and apparatus for monitoring transients in low inductance circuits and to a probe utilized to practice said method and apparatus. More particularly, the instant invention relates to methods of and apparatus for monitoring low inductance circuits, wherein the low inductance circuits include a pair of flat cable transmission lines. The instant invention is further directed to a probe for use in monitoring pairs of flat cable transmission lines.

  16. An experimental study of some ferroresonant circuits

    E-Print Network [OSTI]

    Rose, Price Duane

    1959-01-01T23:59:59.000Z

    many helpful suggestions during the course of this work. CONTENTS Pa'ge PART I ? GENERAL Introduction Circuit Arrangements Studied Method of Approach PART II SERIES FERRORESONANT CIRCUITS Reaction to Variation of Source Voltage Effect of Non...-linear Resistance Reaction to Variation of Switch-Closing Time 13 Method Used to Close the Switch 13 Experimental Results 19 Effect of Residual Magnetism 22 PART III ? SERIES-PARALLEL FERRORESONANT CIRCUITS Reaction to Variation of Source Voltage 30 Reaction...

  17. DC, AC and advanced EV propulsion systems

    SciTech Connect (OSTI)

    O'Neil, W.

    1983-08-01T23:59:59.000Z

    Battery development and liquid fuel availability and cost are still the pacing factors in wide scale electric vehicle introduction. Propulsion systems also require technical development, however, if electric vehicles are to be acceptable in the marketplace in competition against ICE vehicles. Eaton Corporation has undertaken a program designed to identify and investigate three broad types of propulsion systems in identical test vehicles on the same test track under conditions as similar as possible. Characteristics of dc, ac and advanced systems are compared to date, and projections of anticipated results and further work are provided. The compelling advantages of multiple mechanical ratios in EV propulsion systems are reviewed. An emerging, but less obvious, advantage is higher overall system efficiency.

  18. Printed circuit dispersive transmission line

    DOE Patents [OSTI]

    Ikezi, H.; Lin-Liu, Y.R.; DeGrassie, J.S.

    1991-08-27T23:59:59.000Z

    A printed circuit dispersive transmission line structure is disclosed comprising an insulator, a ground plane formed on one surface of the insulator, a first transmission line formed on a second surface of the insulator, and a second transmission line also formed on the second surface of the insulator and of longer length than the first transmission line and periodically intersecting the first transmission line. In a preferred embodiment, the transmission line structure exhibits highly dispersive characteristics by designing the length of one of the transmission line between two adjacent periodic intersections to be longer than the other. 5 figures.

  19. Polysilicon photoconductor for integrated circuits

    DOE Patents [OSTI]

    Hammond, R.B.; Bowman, D.R.

    1989-04-11T23:59:59.000Z

    A photoconductive element of polycrystalline silicon is provided with intrinsic response time which does not limit overall circuit response. An undoped polycrystalline silicon layer is deposited by LPCVD to a selected thickness on silicon dioxide. The deposited polycrystalline silicon is then annealed at a selected temperature and for a time effective to obtain crystal sizes effective to produce an enhanced current output. The annealed polycrystalline layer is subsequently exposed and damaged by ion implantation to a damage factor effective to obtain a fast photoconductive response. 6 figs.

  20. Circuit analysis of quantum measurement

    E-Print Network [OSTI]

    Yuji Kurotani; Masahito Ueda

    2006-09-08T23:59:59.000Z

    We develop a circuit theory that enables us to analyze quantum measurements on a two-level system and on a continuous-variable system on an equal footing. As a measurement scheme applicable to both systems, we discuss a swapping state measurement which exchanges quantum states between the system and the measuring apparatus before the apparatus meter is read out. This swapping state measurement has an advantage in gravitational-wave detection over contractive state measurement in that the postmeasurement state of the system can be set to a prescribed one, regardless of the outcome of the measurement.

  1. Hybrid stretchable circuits on silicone substrate

    SciTech Connect (OSTI)

    Robinson, A., E-mail: adam.1.robinson@nokia.com; Aziz, A., E-mail: a.aziz1@lancaster.ac.uk [Nanoscience Centre, University of Cambridge, Cambridge CB01FF (United Kingdom); Liu, Q.; Suo, Z. [School of Engineering and Applied Sciences and Kavli Institute for Bionano Science and Technology, Harvard University, Cambridge, Massachusetts 02138 (United States); Lacour, S. P., E-mail: stephanie.lacour@epfl.ch [Centre for Neuroprosthetics and Laboratory for Soft Bioelectronics Interfaces, School of Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne 1015 (Switzerland)

    2014-04-14T23:59:59.000Z

    When rigid and stretchable components are integrated onto a single elastic carrier substrate, large strain heterogeneities appear in the vicinity of the deformable-non-deformable interfaces. In this paper, we report on a generic approach to manufacture hybrid stretchable circuits where commercial electronic components can be mounted on a stretchable circuit board. Similar to printed circuit board development, the components are electrically bonded on the elastic substrate and interconnected with stretchable electrical traces. The substrate—a silicone matrix carrying concentric rigid disks—ensures both the circuit elasticity and the mechanical integrity of the most fragile materials.

  2. Abstract --A systematic framework for reliability assessment and fault-tolerant design of multiphase dc-dc

    E-Print Network [OSTI]

    Liberzon, Daniel

    reliability. Index Terms--Markov reliability modeling, maximum power point tracking, photovoltaics, switch1 Abstract -- A systematic framework for reliability assessment and fault-tolerant design of multiphase dc-dc converters deployed in photovoltaic applications is presented. System-level steady

  3. 3X DC-DC Multiplier/Divider for HEV Systems Wei Qian, Fang Z. Peng, Miaosen Shen

    E-Print Network [OSTI]

    Tolbert, Leon M.

    -dc converter, this converter can have three output/input voltage ratios with smooth transition. The control motor to drive the vehicle. The power converter could be just a traditional inverter or a dc, the inductor is bulky, heavy, costly, and always one of the hottest components. With the trend of higher

  4. Annual Meeting of Energy Recovery Council, W hi DC D b 3 2011Washington DC, December 3. 2011

    E-Print Network [OSTI]

    Columbia University

    Annual Meeting of Energy Recovery Council, W hi DC D b 3 2011Washington DC, December 3. 2011 to the recyclers (e.g. metal smelters; secondary paper mills).(e.g. metal smelters; secondary paper mills). All, recovery (called WastetoEnergy; WTE) gy, , y ( gy; ) · All countries (and communities) who rely on WTE also

  5. Development of a Novel Bi-Directional Isolated Multiple-Input DC-DC Converter

    SciTech Connect (OSTI)

    Li, H.

    2005-10-24T23:59:59.000Z

    There is vital need for a compact, lightweight, and efficient energy-storage system that is both affordable and has an acceptable cycle life for the large-scale production of electric vehicles (EVs) and hybrid electric vehicles (HEVs). Most of the current research employs a battery-storage unit (BU) combined with a fuel cell (FC) stack in order to achieve the operating voltage-current point of maximum efficiency for the FC system. A system block diagram is shown in Fig.1.1. In such a conventional arrangement, the battery is sized to deliver the difference between the energy required by the traction drive and the energy supplied by the FC system. Energy requirements can increase depending on the drive cycle over which the vehicle is expected to operate. Peak-power transients result in an increase of losses and elevated temperatures which result in a decrease in the lifetime of the battery. This research will propose a novel two-input direct current (dc) dc to dc converter to interface an additional energy-storage element, an ultracapacitor (UC), which is shown in Fig.1.2. It will assist the battery during transients to reduce the peak-power requirements of the battery.

  6. Step Response of an RLC Circuit ECE 2100 Circuit Analysis Laboratory

    E-Print Network [OSTI]

    Miller, Damon A.

    Step Response of an RLC Circuit ECE 2100 Circuit Analysis Laboratory updated 8 January 2008 Pre of a function generator. As in the RC step response lab, this voltage source will be used to apply a voltage step to the RLC circuit. 1. Find , 0, d, and vC(t) for R1=750, 2450, and 3550. Use a table to present

  7. This document is the preprint version of the paper: L. Meng, T. Dragicevic, J.M. Guerrero, and J.C. Vasquez, "Stability constrained efficiency optimization for droop controlled dc-dc conversion

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    .C. Vasquez, "Stability constrained efficiency optimization for droop controlled dc-dc conversion system, Austria, Nov 2013. Stability Constrained Efficiency Optimization for Droop Controlled DC-DC Conversion a hierarchical control in a droop-controlled dc-dc conversion system with special focus on improving system

  8. Entropy production by simple electrical circuits

    E-Print Network [OSTI]

    E. N. Miranda; S. Nikolskaia

    2012-08-13T23:59:59.000Z

    The entropy production by simple electrical circuits (R, RC, RL) is analyzed. It comes out that the entropy production is minimal, in agreement with a well known theorem due to Prigogine. In this way, it is wrong a recent result by Zupanovic, Juretic and Botric (Physica Review E 70, 056198) who claimed that the entropy production in simple electrical circuits is a maximum

  9. The Design of Integrated Circuits to Observe

    E-Print Network [OSTI]

    Harrison, Reid R.

    -limited application. KEYWORDS | Amplifiers; analog integrated circuits; biomedical signal processing; low must have its own dedicated low-noise amplifier. Although it is tempting to imagine using an analog revealed significant circuit design chal- lenges. Weak neural signals must be amplified and filtered using

  10. LABORATORY II ENERGY AND ELECTRIC CIRCUITS

    E-Print Network [OSTI]

    Minnesota, University of

    LABORATORY II ENERGY AND ELECTRIC CIRCUITS Lab II - 1 It is often useful to study physical. An electric circuit illustrates how energy can be transformed within a system, transferred to different parts it is the electric charge that transports the energy from one place in the system to another

  11. Implementing the DC Mode in Cosmological Simulations with Supercomoving Variables

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Gnedin, Nickolay Y.; Kravtsov, Andrey V.; Rudd, Douglas H.

    2011-06-02T23:59:59.000Z

    As emphasized by previous studies, proper treatment of the density fluctuation on the fundamental scale of a cosmological simulation volume - the 'DC mode' - is critical for accurate modeling of spatial correlations on scales ~> 10% of simulation box size. We provide further illustration of the effects of the DC mode on the abundance of halos in small boxes and show that it is straightforward to incorporate this mode in cosmological codes that use the 'supercomoving' variables. The equations governing evolution of dark matter and baryons recast with these variables are particularly simple and include the expansion factor, and hence the effect of the DC mode, explicitly only in the Poisson equation.

  12. Reusable vibration resistant integrated circuit mounting socket

    DOE Patents [OSTI]

    Evans, Craig N. (Irwin, PA)

    1995-01-01T23:59:59.000Z

    This invention discloses a novel form of socket for integrated circuits to be mounted on printed circuit boards. The socket uses a novel contact which is fabricated out of a bimetallic strip with a shape which makes the end of the strip move laterally as temperature changes. The end of the strip forms a barb which digs into an integrated circuit lead at normal temperatures and holds it firmly in the contact, preventing loosening and open circuits from vibration. By cooling the contact containing the bimetallic strip the barb end can be made to release so that the integrated circuit lead can be removed from the socket without damage either to the lead or to the socket components.

  13. Sequential power-up circuit

    DOE Patents [OSTI]

    Kronberg, J.W.

    1992-06-02T23:59:59.000Z

    A sequential power-up circuit for starting several electrical load elements in series to avoid excessive current surge, comprising a voltage ramp generator and a set of voltage comparators, each comparator having a different reference voltage and interfacing with a switch that is capable of turning on one of the load elements. As the voltage rises, it passes the reference voltages one at a time and causes the switch corresponding to that voltage to turn on its load element. The ramp is turned on and off by a single switch or by a logic-level electrical signal. The ramp rate for turning on the load element is relatively slow and the rate for turning the elements off is relatively fast. Optionally, the duration of each interval of time between the turning on of the load elements is programmable. 2 figs.

  14. active snubber circuit: Topics by E-print Network

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

    Circuits Engineering Websites Summary: Transition Density, A New Measure of Activity in Digital Circuits Farid N. Najm Semiconductor Process & Design Center Texas Instruments...

  15. atmospheric electric circuit: Topics by E-print Network

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

    Berkeley, California of a satisfactory circuit. The topology comprises the gross number of components in the circuit, the type of each Fernandez, Thomas 59 ENG 2MM3...

  16. atmospheric electrical circuit: Topics by E-print Network

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

    Berkeley, California of a satisfactory circuit. The topology comprises the gross number of components in the circuit, the type of each Fernandez, Thomas 59 ENG 2MM3...

  17. Buford Major Rehabilitation Study (1996) and 11th Circuit Hydropower...

    Office of Environmental Management (EM)

    Buford Major Rehabilitation Study (1996) and 11th Circuit Hydropower Report (June 2012) Comparison The rehab study is compared to the 11th Circuit Hydropower Report for capacity...

  18. SPEAR3 LARGE DC MAGNET POWER SUPPLIES

    SciTech Connect (OSTI)

    de Lira, A

    2004-06-23T23:59:59.000Z

    The Stanford Synchrotron Radiation Laboratory (SSRL) has successfully commissioned SPEAR3, its newly upgraded 3-GeV synchrotron light source. First stored beam occurred December 15, 2003 and 100mA operation was reached on January 20, 2004. This paper describes the specification, design, and performance of the SPEAR3 DC magnet large power supplies (LGPS) that consist of tightly-regulated (better than {+-}10 ppm) current sources ranging from 100A to 225A and output powers ranging from 70kW to 135kW. A total of 6 LGPS are in successful operation and are used to power strings of quadrupoles and sextupoles. The LGPS are isolated by a delta/delta-wye 60Hz step-down transformer that provides power to 2 series-connected chopper stages operating phase-shifted at a switching frequency of 18-kHz to provide for fast output response and high efficiency. Also described are outside procurement aspects, installation, in-house testing, and operation of the power supplies.

  19. Radiofrequency amplifier based on a dc superconducting quantum interference device

    DOE Patents [OSTI]

    Hilbert, Claude (Berkeley, CA); Martinis, John M. (Berkeley, CA); Clarke, John (Berkeley, CA)

    1986-01-01T23:59:59.000Z

    A low noise radiofrequency amplifier (10), using a dc SQUID (superconducting quantum interference device) as the input amplifying element. The dc SQUID (11) and an input coil (12) are maintained at superconductivity temperatures in a superconducting shield (13), with the input coil (12) inductively coupled to the superconducting ring (17) of the dc SQUID (11). A radiofrequency signal from outside the shield (13) is applied to the input coil (12), and an amplified radiofrequency signal is developed across the dc SQUID ring (17) and transmitted to exteriorly of the shield (13). A power gain of 19.5.+-.0.5 dB has been achieved with a noise temperature of 1.0.+-.0.4 K. at a frequency of 100 MHz.

  20. Radiofrequency amplifier based on a dc superconducting quantum interference device

    DOE Patents [OSTI]

    Hilbert, C.; Martinis, J.M.; Clarke, J.

    1984-04-27T23:59:59.000Z

    A low noise radiofrequency amplifer, using a dc SQUID (superconducting quantum interference device) as the input amplifying element. The dc SQUID and an input coil are maintained at superconductivity temperatures in a superconducting shield, with the input coil inductively coupled to the superconducting ring of the dc SQUID. A radiofrequency signal from outside the shield is applied to the input coil, and an amplified radiofrequency signal is developed across the dc SQUID ring and transmitted to exteriorly of the shield. A power gain of 19.5 +- 0.5 dB has been achieved with a noise temperature of 1.0 +- 0.4 K at a frequency of 100 MHz.

  1. Mitigation of geomagnetically induced and dc stray currents. Final report

    SciTech Connect (OSTI)

    Kappenman, J.G.

    1983-12-01T23:59:59.000Z

    This report primarily describes several approaches to mitigate the effects of Geomagnetic Induced Currents (GIC) and dc stray currents in power systems; the engineering and design considerations for a neutral capacitor blocking device; and development and testing of a prototype device of this type. Modeling of the power system for computation of GIC are described. Results from three field tests, for documenting the effects of GIC by injecting direct current (dc) into the neutrals of the transformers, are presented. Several mitigation concepts are discussed and evaluated. The concept of blocking GIC and dc stray currents by a neutral capacitor is addressed in detail. The development and testing of the prototype blocking device is described. The technical requirements and specifications for the application of these devices are also included. A perspective on the economics of GIC mitigation is included. The effect of GIC and dc stray currents on HVdc converter operation, supported by computer simulations, is also discussed.

  2. Thermoelectric DC conductivities with momentum dissipation from higher derivative gravity

    E-Print Network [OSTI]

    Long Cheng; Xian-Hui Ge; Zu-Yao Sun

    2015-04-28T23:59:59.000Z

    We present a mechanism of momentum relaxation in higher derivative gravity by adding linear scalar fields to the Gauss-Bonnet theory. We analytically computed all of the DC thermoelectric conductivities in this theory by adopting the method given by Donos and Gauntlett in [arXiv:1406.4742]. The results show that the DC electric conductivity is not a monotonic function of the effective impurity parameter $\\beta$: in the small $\\beta$ limit, the DC conductivity is dominated by the coherent phase, while for larger $\\beta$, pair creation contribution to the conductivity becomes dominant, signaling an incoherent phase. In addition, the DC heat conductivity is found independent of the Gauss-Bonnet coupling constant.

  3. National Science Bowl Brings Best and Brightest to DC

    Broader source: Energy.gov [DOE]

    The National Science Bowl Finals in Washington D.C. April 27 to 30 pit 113 high and middle school teams against one another answering questions Jeopardy-style about biology, chemistry, earth science, physics, astronomy, and math.

  4. Reactive DC magnetron sputtering of ultrathin superconducting niobium nitride films

    E-Print Network [OSTI]

    Dane, Andrew E. (Andrew Edward)

    2015-01-01T23:59:59.000Z

    DC reactive magnetron sputtering was used to deposit few-nanometer-thick films of niobium nitride for fabrication of superconducting devices. Over 1000 samples were deposited on a variety of substrates, under various chamber ...

  5. Low Cost, High Temperature, High Ripple Current DC Bus Capacitors...

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

    2010 DOE Vehicle Technologies and Hydrogen Programs Annual Merit Review and Peer Evaluation Meeting, June 7-11, 2010 -- Washington D.C. ape031liu2010p.pdf More Documents &...

  6. Efficient quantum circuits for arbitrary sparse unitaries

    SciTech Connect (OSTI)

    Jordan, Stephen P. [Institute for Quantum Information, Caltech, Pasadena, California 91125 (United States); Wocjan, Pawel [School of Electrical Engineering and Computer Science, University of Central Florida, Orlando, Florida 32816 (United States)

    2009-12-15T23:59:59.000Z

    Arbitrary exponentially large unitaries cannot be implemented efficiently by quantum circuits. However, we show that quantum circuits can efficiently implement any unitary provided it has at most polynomially many nonzero entries in any row or column, and these entries are efficiently computable. One can formulate a model of computation based on the composition of sparse unitaries which includes the quantum Turing machine model, the quantum circuit model, anyonic models, permutational quantum computation, and discrete time quantum walks as special cases. Thus, we obtain a simple unified proof that these models are all contained in BQP. Furthermore, our general method for implementing sparse unitaries simplifies several existing quantum algorithms.

  7. Overload protection circuit for output driver

    DOE Patents [OSTI]

    Stewart, Roger G. (Neshanic Station, NJ)

    1982-05-11T23:59:59.000Z

    A protection circuit for preventing excessive power dissipation in an output transistor whose conduction path is connected between a power terminal and an output terminal. The protection circuit includes means for sensing the application of a turn on signal to the output transistor and the voltage at the output terminal. When the turn on signal is maintained for a period of time greater than a given period without the voltage at the output terminal reaching a predetermined value, the protection circuit decreases the turn on signal to, and the current conduction through, the output transistor.

  8. A Multiphase, Modular, Bidirectional, Triple-Voltage DC-DC Converter Power Systems

    SciTech Connect (OSTI)

    Su, Gui-Jia [ORNL; Tang, Lixin [ORNL

    2008-01-01T23:59:59.000Z

    Electrical power systems in future hybrid and fuel cell vehicles may employ three voltage [14 V, 42 V, and high voltage (HV)] nets. These will be necessary to accommodate existing 14-V loads as well as efficiently handle new heavy loads at the 42-V net and a traction drive on the HV bus. A low-cost DC-DC converter was proposed for connecting the three voltage nets. It minimizes the number of switches and their associated gate driver components by using two half-bridges and a high-frequency transformer. Another salient feature is that the half bridge on the 42-V bus is also utilized to provide the 14-V bus by operating at duty ratios around an atypical value of 1/3. Moreover, it makes use of the parasitic capacitance of the switches and the transformer leakage inductance for soft switching. The use of half bridges makes the topology well suited for interleaved multiphase modular configurations as a means to increase the power level because the capacitor legs can be shared. This paper presents simulation and experimental results on an interleaved two-phase arrangement rated at 4.5 kW. Also discussed are the benefits of operating with an atypical duty ratio on the transformer and a preferred multiphase configuration to minimize capacitor ripple currents.

  9. Analysis and design of a saturable reactor assisted soft-switching full-bridge dc-dc converter

    SciTech Connect (OSTI)

    Hamada, Satoshi (Sansha Electric Manufacturing Co., Ltd., Osaka (Japan)); Nakaoka, Mutsuo (Kobe Univ. (Japan). Dept. of Electrical and Electronics Engineering)

    1994-05-01T23:59:59.000Z

    Analysis and design considerations for a saturable reactor assisted soft-switching full-bridge dc-dc converter are presented. The converter has advantages such as low switching losses with no substantial increase in conduction losses, wide load range, and constant frequency operation. To show how to utilize the analysis results, a 350-W, 500-kHz converter is chosen as a design example. The results are verified experimentally on a prototype converter.

  10. A High Efficiency DC-DC Converter Topology Suitable for Distributed Large Commercial and Utility Scale PV Systems

    SciTech Connect (OSTI)

    Mohammed S. Agamy; Maja Harfman-Todorovic; Ahmed Elasser; Robert L. Steigerwald; Juan A. Sabate; Song Chi; Adam J. McCann; Li Zhang; Frank Mueller

    2012-09-01T23:59:59.000Z

    In this paper a DC-DC power converter for distributed photovoltaic plant architectures is presented. The proposed converter has the advantages of simplicity, high efficiency, and low cost. High efficiency is achieved by having a portion of the input PV power directly fed forward to the output without being processed by the converter. The operation of this converter also allows for a simplified maximum power point tracker design using fewer measurements

  11. Reid Rosnick/DC/USEPA/US 10/25/2012 11:54 AM

    E-Print Network [OSTI]

    EPA-694 Reid Rosnick/DC/USEPA/US 10/25/2012 11:54 AM To Philip Egidi cc bcc Subject Re: Subpart W Pennsylvania Ave., NW Washington, DC 20460 202.343.9563 rosnick.reid@epa.gov -----Philip Egidi/DC/USEPA/US wrote: ----- To: Reid Rosnick/DC/USEPA/US@EPA From: Philip Egidi/DC/USEPA/US Date: 10/25/2012 11:41AM Cc

  12. Design Robustness Analysis of Neuromorphic Circuits

    E-Print Network [OSTI]

    Bashaireh, Ahmad

    2014-04-23T23:59:59.000Z

    tasks such as pattern recognition. Few attempts have been made to investigate the effect of silicon failures beyond the circuit level. In this thesis, a method is proposed to evaluate the impact of process and environmental variations on the overall...

  13. Analog circuit for controlling acoustic transducer arrays

    DOE Patents [OSTI]

    Drumheller, Douglas S. (Cedar Crest, NM)

    1991-01-01T23:59:59.000Z

    A simplified ananlog circuit is presented for controlling electromechanical transducer pairs in an acoustic telemetry system. The analog circuit of this invention comprises a single electrical resistor which replaces all of the digital components in a known digital circuit. In accordance with this invention, a first transducer in a transducer pair of array is driven in series with the resistor. The voltage drop across this resistor is then amplified and used to drive the second transducer. The voltage drop across the resistor is proportional and in phase with the current to the transducer. This current is approximately 90 degrees out of phase with the driving voltage to the transducer. This phase shift replaces the digital delay required by the digital control circuit of the prior art.

  14. Analysis and Design of Resilient VLSI Circuits

    E-Print Network [OSTI]

    Garg, Rajesh

    2010-07-14T23:59:59.000Z

    (or error caused by radiation particle strikes) have become an increasingly troublesome issue for memory arrays as well as combinational logic circuits. Also, in the DSM era, process variations are increasing at an alarming rate, making it more...

  15. Generating Circuit Tests by Exploiting Designed Behavior

    E-Print Network [OSTI]

    Shirley, Mark Harper

    1988-12-01T23:59:59.000Z

    This thesis describes two programs for generating tests for digital circuits that exploit several kinds of expert knowledge not used by previous approaches. First, many test generation problems can be solved efficiently ...

  16. Microelectronic Devices and Circuits - 2006 Electronic Edition

    E-Print Network [OSTI]

    Fonstad, Clifton

    2006-10-01T23:59:59.000Z

    Combining semiconductor device physics and modeling with electronic circuit analysis and practice in a single sophomore/junior level microelectronics course, this textbook offers an integrated approach so students can truly ...

  17. Carbon nanotube synthesis for integrated circuit interconnects

    E-Print Network [OSTI]

    Nessim, Gilbert Daniel

    2009-01-01T23:59:59.000Z

    Based on their properties, carbon nanotubes (CNTs) have been identified as ideal replacements for copper interconnects in integrated circuits given their higher current density, inertness, and higher resistance to ...

  18. Analysis of neural circuits in vitro

    E-Print Network [OSTI]

    Wang, Jennifer Lynn

    2010-01-01T23:59:59.000Z

    This thesis is a collection of manuscripts addressing connectivity of neural circuits in cultured hippocampal neurons. These studies begin with an investigation of dopaminergic modulation of excitatory synapses in small ...

  19. Flexible Electronics: Materials, Circuits, and Design Methodology

    E-Print Network [OSTI]

    Kim, Chris H.

    Electronics: Today Display Solar cell Battery 4 #12;Next Generation Flexible Electronics Problem: Traumatic system Proposed EEG system Electrode sheet Flexible electronics ... ... ... Next Generation FlexibleFlexible Electronics: Materials, Circuits, and Design Methodology Chris H. Kim Dept. of Electrical

  20. Differential transimpedance amplifier circuit for correlated differential amplification

    DOE Patents [OSTI]

    Gresham, Christopher A. (Albuquerque, NM); Denton, M. Bonner (Tucson, AZ); Sperline, Roger P. (Tucson, AZ)

    2008-07-22T23:59:59.000Z

    A differential transimpedance amplifier circuit for correlated differential amplification. The amplifier circuit increase electronic signal-to-noise ratios in charge detection circuits designed for the detection of very small quantities of electrical charge and/or very weak electromagnetic waves. A differential, integrating capacitive transimpedance amplifier integrated circuit comprising capacitor feedback loops performs time-correlated subtraction of noise.

  1. Triple effect absorption chiller utilizing two refrigeration circuits

    DOE Patents [OSTI]

    DeVault, Robert C. (Knoxville, TN)

    1988-01-01T23:59:59.000Z

    A triple effect absorption method and apparatus having a high coefficient of performance. Two single effect absorption circuits are combined with heat exchange occurring between a condenser and absorber of a high temperature circuit, and a generator of a low temperature circuit. The evaporators of both the high and low temperature circuits provide cooling to an external heat load.

  2. Foundations for a Circuit Complexity Theory of Sensory Processing

    E-Print Network [OSTI]

    Maass, Wolfgang

    bounds, in particular with linear or almost linear total wire length. 1 Introduction Circuit complexity interest in neuromorphicengineering, especially analog VLSI, and the analysis of neural circuits mathematical analysis of such circuits. The standard mathematical approach is to model such circuits

  3. Challenges for Qualitative Electrical Reasoning in Automotive Circuit Simulation

    E-Print Network [OSTI]

    Snooke, Neal

    Challenges for Qualitative Electrical Reasoning in Automotive Circuit Simulation Neal Snooke it to be used for applications on realistic automotive circuits. The type of circuits for which it is most automotive circuits with more complex overall behaviour can be approximated using this type of modelling

  4. Equivalent Circuit Modeling of Hysteresis Motors

    SciTech Connect (OSTI)

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

    2009-08-31T23:59:59.000Z

    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.

  5. Norton Collector Circuit The Norton equivalent circuit seen looking into the collector can be used to solve for the

    E-Print Network [OSTI]

    Leach Jr.,W. Marshall

    Norton Collector Circuit The Norton equivalent circuit seen looking into the collector can be used with Thévenin sources connected to its base and emitter. With the collector grounded, the col- lector current is called the short-circuit output current or ic(sc). The current source in the Norton collector circuit has

  6. Improving the dynamic performance of a complex AC/DC system by HVDC control modifications

    SciTech Connect (OSTI)

    Hammad, A.E. (ABB Power Systems, Baden (CH)); Gagnon, J. (Hydro Quebec, Montreal (CA)); McCallum, D. (IREQ, Montreal (CA))

    1990-10-01T23:59:59.000Z

    The power system of Hydro-Quebec has a peak load of approximately 27 GW. The great distance between the production sites and the load centers introduces stability limitations, which is the reason why the Quebec grid cannot be economically synchronized (through ac transmission with limited capacity) with the U.S. northeastern network. Power exports are therefore dependent on the use of HVDC links of which Hydro-Quebec now possesses five, for a capacity of over 2600 MW. Such a capacity will again soon increase. At the moment, the Chateauguay scheme has the largest HVDC capacity. It transfers 1000 MW by means of two Back-to-Back converter blocks. Various automatic control systems are installed on the Chateauguay scheme owing to the fact that a single circuit of a 765 kV ac line transmits the output of both the HVDC converter stations as well as the output from Beauharnois hydro generating station. Such controls have performed satisfactorily since 1984. However, a remarkable improvement of the overall ac/dc system dynamic performance can be gained by making certain modifications in some of these HVDC system controls. This paper presents the salient features of such control modifications, currently under consideration, using the results of an investigation by digital and analogue simulations that demonstrate the achieved improvements.

  7. Chapter 54. Superconducting Circuits and Quantum Computing Superconducting Circuits and Quantum Computing

    E-Print Network [OSTI]

    Chapter 54. Superconducting Circuits and Quantum Computing 54-1 Superconducting Circuits. William D. Oliver (MIT Lincoln Laboratory Senior Staff Member, RLE affiliate) Overview: Superconducting computer. Our qubit species of choice is the superconducting persistent-current (PC) qubit (also known

  8. Characterization of the PvdS-regulated promoter motif in Pseudomonas syringae pv. tomato DC3000 reveals

    E-Print Network [OSTI]

    Myers, Chris

    Characterization of the PvdS-regulated promoter motif in Pseudomonas syringae pv. tomato DC3000S, a group IV sigma factor encoded by Pseudomonas syringae pv. tomato DC3000 (DC3000), a plant pathogen, 2002; Potvin et al., 2008). The model plant pathogen Pseudomonas syringae pv. tomato DC3000 (DC3000

  9. DESIGN OF A DC/RF PHOTOELECTRON GUN.

    SciTech Connect (OSTI)

    YU,D.NEWSHAM,Y.SMIRONOV,A.YU,J.SMEDLEY,J.SRINIVASAN RAU,T.LEWELLEN,J.ZHOLENTS,A.

    2003-05-12T23:59:59.000Z

    An integrated dc/rf photoelectron gun produces a low-emittance beam by first rapidly accelerating electrons at a high gradient during a short ({approx}1 ns), high-voltage pulse, and then injecting the electrons into an rf cavity for subsequent acceleration. Simulations show that significant improvement of the emittance appears when a high field ({approx} 0.5-1 GV/m) is applied to the cathode surface. An adjustable dc gap ({le} 1 mm) which can be integrated with an rf cavity is designed for initial testing at the Injector Test Stand at Argonne National Laboratory using an existing 70-kV pulse generator. Plans for additional experiments of an integrated dc/rf gun with a 250-kV pulse generator are being made.

  10. Active dc filter for HVDC system--A test installation in the Konti-Skan DC link at Lindome converter station

    SciTech Connect (OSTI)

    Zhang, Wenyan; Asplund, G. (ABB Power Systems, Ludvika (Sweden). HVDC Division); Aberg, A. (ABB Corporate Research, Lund (Sweden). Dept. of Man-Machine Communication); Jonsson, U. (Svenska Kraftnaet, Vaellingby (Sweden)); Loeoef, O. (Vattenfall AB, Trollhaettan (Sweden). Region Vaestsverige)

    1993-07-01T23:59:59.000Z

    The purpose of introducing active dc filters is to meet the more and more stringent requirement from power utilities on limiting telephone interference caused by harmonic currents from HVdc transmission lines, without unnecessarily increasing the cost of HVdc stations. An active dc filter installed in the Konti-Skan HVdc link is described. The active dc filter is connected at the bottom of an existing passive dc filter at the Lindome station. The active dc filter includes optic harmonic current measuring unit, control system, protection and supervision system, PWM power amplifier, high-frequency transformer, surge arrester, and coupling apparatuses. The active dc filter has small physical size and occupies small ground area. The performance of the active dc filter for eliminating the disturbing harmonics is excellent. To achieve comparable results by passive filters would require something like ten times more high voltage equipment.

  11. Application of direct pulsewidth modulation scheme to AC-DC converters: - a way to reduce ripple

    E-Print Network [OSTI]

    Zhang, Yuemin

    1993-01-01T23:59:59.000Z

    Modulation (ISPWM), 4 Direct Pulsewidth Modulation (DPWM). 15 5 Single Phase Half Controlled PWM ac-dc Converter . 6 Single Phase Full controlled PWM ac-dc Converter . 18 18 7 Simulation of SPWM ac-dc Converter. 20 8 Output Voltage Spectra of SPWM ac... 30 Balanced Three Phase Inputs 31 Output Voltage of A Three Phase Full Controlled ac-dc SPWM Converter. 42 32 Output Voltage of A Three Phase Full Controlled ac-dc EPWM Con- verter 33 Output Voltage of A Three Phase Full Controlled ac-dc ISPWM Con...

  12. Graphite electrode DC arc furnace. Innovative technology summary report

    SciTech Connect (OSTI)

    NONE

    1999-05-01T23:59:59.000Z

    The Graphite Electrode DC Arc Furnace (DC Arc) is a high-temperature thermal process, which has been adapted from a commercial technology, for the treatment of mixed waste. A DC Arc Furnace heats waste to a temperature such that the waste is converted into a molten form that cools into a stable glassy and/or crystalline waste form. Hazardous organics are destroyed through combustion or pyrolysis during the process and the majority of the hazardous metals and radioactive components are incorporated in the molten phase. The DC Arc Furnace chamber temperature is approximately 593--704 C and melt temperatures are as high as 1,500 C. The DC Arc system has an air pollution control system (APCS) to remove particulate and volatiles from the offgas. The advantage of the DC Arc is that it is a single, high-temperature thermal process that minimizes the need for multiple treatment systems and for extensive sorting/segregating of large volumes of waste. The DC Arc has the potential to treat a wide range of wastes, minimize the need for sorting, reduce the final waste volumes, produce a leach resistant waste form, and destroy organic contaminants. Although the DC arc plasma furnace exhibits great promise for treating the types of mixed waste that are commonly present at many DOE sites, several data and technology deficiencies were identified by the Mixed Waste Focus Area (MWFA) regarding this thermal waste processing technique. The technology deficiencies that have been addressed by the current studies include: establishing the partitioning behavior of radionuclides, surrogates, and hazardous metals among the product streams (metal, slag, and offgas) as a function of operating parameters, including melt temperature, plenum atmosphere, organic loading, chloride concentration, and particle size; demonstrating the efficacy of waste product removal systems for slag and metal phases; determining component durability through test runs of extended duration, evaluating the effect of feed composition variations on process operating conditions and slag product performance; and collecting mass balance and operating data to support equipment and instrument design.

  13. Dual circuit embossed sheet heat transfer panel

    DOE Patents [OSTI]

    Morgan, G.D.

    1984-02-21T23:59:59.000Z

    A heat transfer panel provides redundant cooling for fusion reactors or the like environment requiring low-mass construction. Redundant cooling is provided by two independent cooling circuits, each circuit consisting of a series of channels joined to inlet and outlet headers. The panel comprises a welded joinder of two full-size and two much smaller partial-size sheets. The first full-size sheet is embossed to form first portions of channels for the first and second circuits, as well as a header for the first circuit. The second full-sized sheet is then laid over and welded to the first full-size sheet. The first and second partial-size sheets are then overlaid on separate portions of the second full-sized sheet, and are welded thereto. The first and second partial-sized sheets are embossed to form inlet and outlet headers, which communicate with channels of the second circuit through apertures formed in the second full-sized sheet. 6 figs.

  14. Lookout device for high voltage circuit breaker

    SciTech Connect (OSTI)

    Kozlowski, L.J.; Shirey, L.A.

    1991-12-31T23:59:59.000Z

    An improved lockout assembly is provided for a circuit breaker to lock the switch handle into a selected switch position. The lockout assembly includes two main elements, each having a respective foot for engaging a portion of the upper housing wall of the circuit breaker. The first foot is inserted into a groove in the upper housing wall, and the second foot is inserted into an adjacent aperture (e.g., a slot) in the upper housing wall. The first foot is slid under and into engagement with a first portion, and the second foot is slid under and into engagement with a second portion of the upper housing wall. At the same time the respective two feet are placed in engagement with the respective portions of the upper housing wall, two holes, one on each of the respective two main elements of the assembly, are placed in registration; and a locking device, such as a special scissors equipped with a padlock, is installed through the registered holes to secure the lockout assembly on the circuit breaker. When the lockout assembly of the invention is secured on the circuit breaker, the switch handle of the circuit breaker is locked into the selected switch position and prevented from being switched to another switch position.

  15. Lockout device for high voltage circuit breaker

    DOE Patents [OSTI]

    Kozlowski, L.J.; Shirey, L.A.

    1993-01-26T23:59:59.000Z

    An improved lockout assembly is provided for a circuit breaker to lock the switch handle into a selected switch position. The lockout assembly includes two main elements, each having a respective foot for engaging a portion of the upper housing wall of the circuit breaker. The first foot is inserted into a groove in the upper housing wall, and the second foot is inserted into an adjacent aperture (e.g., a slot) in the upper housing wall. The first foot is slid under and into engagement with a first portion, and the second foot is slid under and into engagement with a second portion of the upper housing wall. At the same time the respective two feet are placed in engagement with the respective portions of the upper housing wall, two holes, one on each of the respective two main elements of the assembly, are placed in registration; and a locking device, such as a special scissors equipped with a padlock, is installed through the registered holes to secure the lockout assembly on the circuit breaker. When the lockout assembly of the invention is secured on the circuit breaker, the switch handle of the circuit breaker is locked into the selected switch position and prevented from being switched to another switch position.

  16. Lockout device for high voltage circuit breaker

    SciTech Connect (OSTI)

    Kozlowski, Lawrence J. (New Kensington, PA); Shirey, Lawrence A. (North Huntingdon, PA)

    1993-01-01T23:59:59.000Z

    An improved lockout assembly is provided for a circuit breaker to lock the switch handle into a selected switch position. The lockout assembly includes two main elements, each having a respective foot for engaging a portion of the upper housing wall of the circuit breaker. The first foot is inserted into a groove in the upper housing wall, and the second foot is inserted into an adjacent aperture (e.g., a slot) in the upper housing wall. The first foot is slid under and into engagement with a first portion, and the second foot is slid under and into engagement with a second portion of the upper housing wall. At the same time the repsective two feet are placed in engagement with the respective portions of the upper housing wall, two holes, one on each of the respective two main elements of the assembly, are placed in registration; and a locking device, such as a special scissors equipped with a padlock, is installed through the registered holes to secure the lockout assembly on the circuit breaker. When the lockout assembly of the invention is secured on the circuit breaker, the switch handle of the circuit breaker is locked into the selected switch position and prevented from being switched to another switch position.

  17. An analysis of reversible multiplier circuits

    E-Print Network [OSTI]

    Anindita Banerjee; Anirban Pathak

    2009-07-20T23:59:59.000Z

    Multiplier circuits play an important role in reversible computation, which is helpful in diverse areas such as low power CMOS design, optical computing, DNA computing and bioinformatics. Here we propose a new reversible multiplier circuit with optimized hardware complexity. The optimized multiplier circuit is compared with the earlier proposals. We have shown that the quantum cost of earlier proposals can be further reduced with the help of existing local optimization algorithms (e.g. template matching, moving rule and deletion rule). A systematic protocol for reduction of quantum cost has been proposed. It has also been shown that the advantage in gate count obtained in some of the earlier proposals by introduction of new reversible gates is an artifact and if it is allowed then every circuit block can be reduced to a single gate. Further, it is shown that the 4x4 reversible gates proposed for designing of a component of multiplier circuit (full adder) is neither unique nor special and many such 4x4 gates may be proposed. As example three such new gates have been presented here and it is shown that the proposed gates are universal. It is also shown that the total cost of our design is minimum.

  18. On the Synthesis of Sequential Reversible Circuit

    E-Print Network [OSTI]

    Anindita Banerjee; Anirban Pathak

    2007-07-28T23:59:59.000Z

    Reversible circuits for SR flip flop, JK flip flop, D flip flop, T flip flop, Master Slave D flip flop and Master Slave JK flip flop have been provided with three different logical approaches. All the circuits have been optimized with the help of existing local optimization algorithms (e.g. template matching, moving rule and deletion rule) and the optimized sequential circuits have been compared with the earlier proposals for the same. It has been shown that the present proposals have lower gate complexities and lower number of garbage bits compared to the earlier proposals. It has also been shown that the advantage in gate count obtained in some of the earlier proposals by introduction of New gates is an \\textcolor{black}{artifact} and if it is allowed then every circuit block (unless there is a measurement) can be reduced to a single gate. Further, it is shown that a reversible flip flop can be constructed even without a feedback. In this context, some important conceptual issues related to the designing and optimization of sequential reversible circuits have also been addressed.

  19. A 93% efficiency reconfigurable switched-capacitor DC-DC converter using on-chip ferroelectric capacitors

    E-Print Network [OSTI]

    El-Damak, Dina Reda

    Dynamic Voltage Scaling (DVS) has become one of the standard techniques for energy efficient operation of systems by powering circuit blocks at the minimum voltage that meets the desired performance [1]. Switched Capacitor ...

  20. Lithium Circuit Test Section Design and Fabrication

    SciTech Connect (OSTI)

    Godfroy, Thomas; Garber, Anne; Martin, James [NASA Marshall Space Flight Center, Nuclear Systems Engineering Analysis, Huntsville, Alabama 35812 (United States)

    2006-01-20T23:59:59.000Z

    The Early Flight Fission -- Test Facilities (EFF-TF) team has designed and built an actively pumped lithium flow circuit. Modifications were made to a circuit originally designed for NaK to enable the use of lithium that included application specific instrumentation and hardware. Component scale freeze/thaw tests were conducted to both gain experience with handling and behavior of lithium in solid and liquid form and to supply anchor data for a Generalized Fluid System Simulation Program (GFSSP) model that was modified to include the physics for freeze/thaw transitions. Void formation was investigated. The basic circuit components include: reactor segment, lithium to gas heat exchanger, electromagnetic (EM) liquid metal pump, load/drain reservoir, expansion reservoir, instrumentation, and trace heaters. This paper discusses the overall system design and build and the component testing findings.

  1. Package for integrated optic circuit and method

    DOE Patents [OSTI]

    Kravitz, Stanley H. (26 Aspen Rd., Placitas, NM 87043); Hadley, G. Ronald (6012 Annapolis NE., Albuquerque, NM 87111); Warren, Mial E. (3825 Mary Ellen NE., Albuquerque, NM 87111); Carson, Richard F. (1036 Jewel Pl. NE., Albuquerque, NM 87123); Armendariz, Marcelino G. (1023 Oro Real NE., Albuquerque, NM 87123)

    1998-01-01T23:59:59.000Z

    A structure and method for packaging an integrated optic circuit. The package comprises a first wall having a plurality of microlenses formed therein to establish channels of optical communication with an integrated optic circuit within the package. A first registration pattern is provided on an inside surface of one of the walls of the package for alignment and attachment of the integrated optic circuit. The package in one embodiment may further comprise a fiber holder for aligning and attaching a plurality of optical fibers to the package and extending the channels of optical communication to the fibers outside the package. In another embodiment, a fiber holder may be used to hold the fibers and align the fibers to the package. The fiber holder may be detachably connected to the package.

  2. Radiation-hardened transistor and integrated circuit

    DOE Patents [OSTI]

    Ma, Kwok K. (Albuquerque, NM)

    2007-11-20T23:59:59.000Z

    A composite transistor is disclosed for use in radiation hardening a CMOS IC formed on an SOI or bulk semiconductor substrate. The composite transistor has a circuit transistor and a blocking transistor connected in series with a common gate connection. A body terminal of the blocking transistor is connected only to a source terminal thereof, and to no other connection point. The blocking transistor acts to prevent a single-event transient (SET) occurring in the circuit transistor from being coupled outside the composite transistor. Similarly, when a SET occurs in the blocking transistor, the circuit transistor prevents the SET from being coupled outside the composite transistor. N-type and P-type composite transistors can be used for each and every transistor in the CMOS IC to radiation harden the IC, and can be used to form inverters and transmission gates which are the building blocks of CMOS ICs.

  3. Electronic circuit for measuring series connected electrochemical cell voltages

    DOE Patents [OSTI]

    Ashtiani, Cyrus N. (West Bloomfield, MI); Stuart, Thomas A. (Toledo, OH)

    2000-01-01T23:59:59.000Z

    An electronic circuit for measuring voltage signals in an energy storage device is disclosed. The electronic circuit includes a plurality of energy storage cells forming the energy storage device. A voltage divider circuit is connected to at least one of the energy storage cells. A current regulating circuit is provided for regulating the current through the voltage divider circuit. A voltage measurement node is associated with the voltage divider circuit for producing a voltage signal which is proportional to the voltage across the energy storage cell.

  4. Hybrid high direct current circuit interrupter

    DOE Patents [OSTI]

    Rockot, J.H.; Mikesell, H.E.; Jha, K.N.

    1998-08-11T23:59:59.000Z

    A device and a method are disclosed for interrupting very high direct currents (greater than 100,000 amperes) and simultaneously blocking high voltages (greater than 600 volts). The device utilizes a mechanical switch to carry very high currents continuously with low loss and a silicon controlled rectifier (SCR) to bypass the current around the mechanical switch while its contacts are separating. A commutation circuit, connected in parallel with the SCR, turns off the SCR by utilizing a resonant circuit to divert the SCR current after the switch opens. 7 figs.

  5. Hybrid high direct current circuit interrupter

    SciTech Connect (OSTI)

    Rockot, J.H.; Mikesell, H.E.; Jha, K.N.

    1996-12-31T23:59:59.000Z

    A device and a method for interrupting very high direct currents (greater than 100,000 amperes) and simultaneously blocking high voltages (greater than 600 volts). The device utilizes a mechanical switch to carry very high currents continuously with low loss and a silicon controlled rectifier (SCR) to bypass the current around the mechanical switch while its contacts are separating. A commutation circuit, connected in parallel with the SCR, turns off the SCR by utilizing a resonant circuit to divert the SCR current after the switch opens.

  6. Electronic Circuit Realization of the Logistic Map

    E-Print Network [OSTI]

    Madhekar Suneel

    2006-03-11T23:59:59.000Z

    An electronic circuit realization of the logistic difference equation is presented using analog electronics. The behavior of the realized system is evaluated against computer simulations of the same. The circuit is found to exhibit the entire range of dynamics of the logistic equation: fixed points, periodicity, period doubling, chaos and intermittency. Quantitative measurements of the dynamics of the realized system are presented and are found to be in good agreement with the theoretical values. Some possible applications of such a realization are briefly discussed.

  7. BEAM DYNAMICS SIMULATIONS FOR A DC GUN BASED INJECTOR FOR PERL...

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

    DC gun. The schematic layout of a PERL DC gun based injector and its preliminary beam dynamics are presented in this paper. The transverse and longitudinal emittance of photo-...

  8. Analysis of Fe Nanoparticles Using XPS Measurements Under D.C...

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

    Fe Nanoparticles Using XPS Measurements Under D.C. or Pulsed-Voltage Bias. Analysis of Fe Nanoparticles Using XPS Measurements Under D.C. or Pulsed-Voltage Bias. Abstract: The...

  9. If you reside in WASHINGTON, DC - MD -VA - WV your salary will...

    National Nuclear Security Administration (NNSA)

    If you are employed in the WASHINGTON, DC Metropolitan Area (D.C., Baltimore, Northern VA, Eastern WV, and Southern PA) your salary will range from: Pay Band Pay Plan(s) Minimum...

  10. Energy Secretary Moniz's Remarks at CSIS in Washington D.C. on...

    Energy Savers [EERE]

    Moniz's Remarks at CSIS in Washington D.C. on Energy Security 40 Years after the Embargo - As Delivered Energy Secretary Moniz's Remarks at CSIS in Washington D.C. on Energy...

  11. U.S. Department of Energy - Washington, DC | Department of Energy

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

    Photovoltaic System at the Forrestal Building in Washington, DC The U.S. Department of Energy (DOE) is housed in the Forrestal Building in Washington, DC. A photovoltaic (PV)...

  12. Electrostatic coalescence system with independent AC and DC hydrophilic electrodes

    DOE Patents [OSTI]

    Hovarongkura, A. David (Arlington, VA); Henry, Jr., Joseph D. (Morgantown, WV)

    1981-01-01T23:59:59.000Z

    An improved electrostatic coalescence system is provided in which independent AC and DC hydrophilic electrodes are employed to provide more complete dehydration of an oil emulsion. The AC field is produced between an AC electrode array and the water-oil interface wherein the AC electrode array is positioned parallel to the interface which acts as a grounded electrode. The emulsion is introduced into the AC field in an evenly distributed manner at the interface. The AC field promotes drop-drop and drop-interface coalescence of the water phase in the entering emulsion. The continuous oil phase passes upward through the perforated AC electrode array and enters a strong DC field produced between closely spaced DC electrodes in which small dispersed droplets of water entrained in the continuous phase are removed primarily by collection at hydrophilic DC electrodes. Large droplets of water collected by the electrodes migrate downward through the AC electrode array to the interface. All phase separation mechanisms are utilized to accomplish more complete phase separation.

  13. DC WRRC Report No. 126 GROUND WATER RESOURCE ASSESSMENT STUDY

    E-Print Network [OSTI]

    District of Columbia, University of the

    DRILLING AND FIELD OPERATIONS REPORT FOR THE GROUP A WELLS D.C. WATER RESOURCES RESEARCH CENTER University No. 126 GROUND WATER RESOURCE ASSESSMENT STUDY FOR THE DISTRICT OF COLUMBIA WELL DRILLING AND FIELDDC WRRC Report No. 126 GROUND WATER RESOURCE ASSESSMENT STUDY FOR THE DISTRICT OF COLUMBIA WELL

  14. D.C. Water Resources Research Center Annual Technical Report

    E-Print Network [OSTI]

    and among agencies, universities, and other area researchers; and to support the development and Guidelines under the Water Resources Development Act, and other federal spending and activities relatedD.C. Water Resources Research Center Annual Technical Report FY 2009 D.C. Water Resources Research

  15. EE443L Lab 2: Modeling a DC Motor Introduction

    E-Print Network [OSTI]

    Wedeward, Kevin

    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

  16. DC Optimal Power Flow: Uniqueness and Chee Wei Tan

    E-Print Network [OSTI]

    Tan, Chee Wei

    and are computationally fast for practical smart power grids. I. BACKGROUND The Optimal Power Flow (OPF) problem network. The DC-OPF can be practically important in a smart grid, where there are renewables, e.g., solar implications on how algorithms can be designed to solve the OPF in a smart grid. Different from prior work

  17. D.C. Water Resources Research Institute Annual Technical Report

    E-Print Network [OSTI]

    projects that address the three components of integrated urban water system: storm water runoff and sewer developing and maintaining new environmental quality testing and modeling tools to advance water researchD.C. Water Resources Research Institute Annual Technical Report FY 2013 D.C. Water Resources

  18. Natural Gas Pipeline Leaks Across Washington, DC Robert B. Jackson,,,

    E-Print Network [OSTI]

    Jackson, Robert B.

    Natural Gas Pipeline Leaks Across Washington, DC Robert B. Jackson,,, * Adrian Down, Nathan G increased in recent decades, but incidents involving natural gas pipelines still cause an average of 17 fatalities and $133 M in property damage annually. Natural gas leaks are also the largest anthropogenic

  19. High Voltage DC Transmission 1.0 Introduction

    E-Print Network [OSTI]

    McCalley, James D.

    1 High Voltage DC Transmission 1.0 Introduction HVDC has been applied in electric power systems for many years now. Figure 1 illustrates worldwide many of the HVDC applications [1]. Fig. 1 ABB provides a webpage which summarizes HVDC projects by type and capacity or by commissioning year [2]. Wikipedia [3

  20. WASHINGTON TECHNICAL INSTITUTE WASHINGTON, D.C. 20008

    E-Print Network [OSTI]

    District of Columbia, University of the

    WASHINGTON TECHNICAL INSTITUTE WASHINGTON, D.C. 20008 WRRC REPORT NO. 9 CHARACTERIZATION-379, as amended. Agreement No. 14-34-0001-6066 Water Resources Research Center Washington Technical Institute Analysis of Composite Samples Before Concentration............ 16 5. Organic Losses During Concentration

  1. Reprint & Copyright by Aerospace Medical Association, Washington, DC

    E-Print Network [OSTI]

    Reprint & Copyright ©by Aerospace Medical Association, Washington, DC TECHNICAL NOTE Reflectance.EPICS Biomedical Engineering and Science Institute and Department of Electrical and Computer Engineering, Drexel and pulsatile and mean Doppler velocities were examined as predictors of impending peripheral light loss (PLL

  2. Building Scale DC Microgrids Chris Marnay, Steven Lanzisera, Michael Stadler, and Judy Lai

    E-Print Network [OSTI]

    of building loads are either native DC, such as electronics and compact fluorescent and light emitting diode

  3. Interviews in Washington, DC for Albert Einstein Fellowship Semi-Finalists

    Broader source: Energy.gov [DOE]

    Selected semi-finalists in the Albert Einstein Distinguished Educator Fellowship are invited to DC for interviews.

  4. A Decentralized Protection Scheme for Converters Utilizing a DC-link Inductor

    E-Print Network [OSTI]

    Lipo, Thomas

    - as in HVDC transmission for example - as well as in DC-links for high-power current source inverters

  5. Control of a Fuel-Cell Powered DC Electric Vehicle Motor

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Control of a Fuel-Cell Powered DC Electric Vehicle Motor Federico Zenith Sigurd Skogestad Meeting, 2005 www.ntnu.no Federico Zenith, Sigurd Skogestad, Control of a Fuel-Cell Powered DC Electric Vehicle Motor #12;2 Outline 1) Control of Fuel Cells--Status 2) Dynamic Modelling of Fuel Cells 3) DC

  6. Development of 13-V, 5000-A DC Power Supply with High-Frequency Transformer Coupling

    E-Print Network [OSTI]

    Fujimoto, Hiroshi

    -voltage and large-current DC power supply with a high-frequency transformer coupling, which is applied to electric. Keywords-DC power supply; low-voltage and large-current; high-frequency transformer; Schottky diodeDevelopment of 13-V, 5000-A DC Power Supply with High-Frequency Transformer Coupling Applied

  7. Diagonal quantum circuits: their computational power and applications

    E-Print Network [OSTI]

    Yoshifumi Nakata; Mio Murao

    2014-08-04T23:59:59.000Z

    Diagonal quantum circuits are quantum circuits comprising only diagonal gates in the computational basis. In spite of a classical feature of diagonal quantum circuits in the sense of commutativity of all gates, their computational power is highly likely to outperform classical one and they are exploited for applications in quantum informational tasks. We review computational power of diagonal quantum circuits and their applications. We focus on the computational power of instantaneous quantum polynomial-time (IQP) circuits, which are a special type of diagonal quantum circuits. We then review an approximate generation of random states as an application of diagonal quantum circuits, where random states are an ensemble of pure states uniformly distributed in a Hilbert space. We also present a thermalizing algorithm of classical Hamiltonians by using diagonal quantum circuits. These applications are feasible to be experimentally implemented by current technology due to a simple and robust structure of diagonal gates.

  8. Regulation of mammalian neuronal circuit development by CPG 15

    E-Print Network [OSTI]

    Leslie, Jennifer H

    2012-01-01T23:59:59.000Z

    The orderly assembly of neuronal circuits is specified by developmental programs of gene expression, however, the final stage in circuit development, maturation and refinement of specific synaptic connections, is strongly ...

  9. accurate analog circuits: Topics by E-print Network

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

    The total size of each centroid circuit is 160m x 160m in a standard 1.2-m CMOS process. Paul M. Furth; Natalie Clark 1998-01-01 6 Low voltage analog circuit design...

  10. analog circuits macromodel: Topics by E-print Network

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

    The total size of each centroid circuit is 160m x 160m in a standard 1.2-m CMOS process. Paul M. Furth; Natalie Clark 1998-01-01 7 Low voltage analog circuit design...

  11. analog linear circuits: Topics by E-print Network

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

    The total size of each centroid circuit is 160m x 160m in a standard 1.2-m CMOS process. Paul M. Furth; Natalie Clark 1998-01-01 10 Low voltage analog circuit design...

  12. A Taxonomy of Rerouting in Circuit-Switched Networks

    E-Print Network [OSTI]

    Wong, Eric Wing-Ming

    A Taxonomy of Rerouting in Circuit-Switched Networks Eric W. M. Wong and Andy K. M. Chan, City presents a taxonomy of rerouting in circuit- switched networks showing the various ways rerouting can

  13. 6.301 Solid-State Circuits, Spring 2003

    E-Print Network [OSTI]

    Roberge, James

    This course covers analog circuit analysis and design, focusing on the tools and methods necessary for the creative design of useful circuits using active devices. The class stresses insight and intuition, applied to the ...

  14. Cryogenic direct current superconducting quantum interference device readout circuit

    E-Print Network [OSTI]

    Le Roy, Robert J.

    Cryogenic direct current superconducting quantum interference device readout circuit Michael Mück SQUID readout circuit, which can be operated at liquid helium temperatures. Although room electronics, and feedback coil as short as possible to minimize phase shifts and time delays. Cooling

  15. Protecting Circuits from Computationally Bounded and Noisy Leakage

    E-Print Network [OSTI]

    Faust, Sebastian

    Physical computational devices leak side-channel information that may, and often does, reveal secret internal states. We present a general transformation that compiles any circuit into a circuit with the same functionality ...

  16. IMPACT OF DYNAMIC VOLTAGE SCALING (DVS) ON CIRCUIT OPTIMIZATION

    E-Print Network [OSTI]

    Esquit Hernandez, Carlos A.

    2010-01-16T23:59:59.000Z

    Circuit designers perform optimization procedures targeting speed and power during the design of a circuit. Gate sizing can be applied to optimize for speed, while Dual-VT and Dynamic Voltage Scaling (DVS) can be applied to optimize for leakage...

  17. IMPACT OF DYNAMIC VOLTAGE SCALING (DVS) ON CIRCUIT OPTIMIZATION 

    E-Print Network [OSTI]

    Esquit Hernandez, Carlos A.

    2010-01-16T23:59:59.000Z

    Circuit designers perform optimization procedures targeting speed and power during the design of a circuit. Gate sizing can be applied to optimize for speed, while Dual-VT and Dynamic Voltage Scaling (DVS) can be applied ...

  18. A Noise-Shaped Switched-Capacitor DC-DC Voltage Regulator A. Rao, W.McIntyre 1

    E-Print Network [OSTI]

    Moon, Un-Ku

    -dc converter with fractional gains. The charge pump used to convert the input voltage acts as a D/A converter the inductive conversion topology has been the standard solution to providing a constant and stable voltage from a battery. With the continued shrinking of the hand-held devices as cell phones, PDA's, pagers and laptops

  19. 164 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 21, NO. 1, JANUARY 2006 A Digitally Controlled DC/DC Converter

    E-Print Network [OSTI]

    Popovic, Zoya

    164 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 21, NO. 1, JANUARY 2006 A Digitally Controlled DC of power, dynamic control of the drain supply voltage has been proposed [1]­[6]. The technique of adjusting-loop implementation of the RFPA power control through the drain supply voltage. The ob- jectives are to improve

  20. Count-doubling time safety circuit

    DOE Patents [OSTI]

    Rusch, Gordon K. (Downers Grove, IL); Keefe, Donald J. (Lemont, IL); McDowell, William P. (Downers Grove, IL)

    1981-01-01T23:59:59.000Z

    There is provided a nuclear reactor count-factor-increase time monitoring circuit which includes a pulse-type neutron detector, and means for counting the number of detected pulses during specific time periods. Counts are compared and the comparison is utilized to develop a reactor scram signal, if necessary.

  1. An intuitive approach to quantum circuit simulation

    E-Print Network [OSTI]

    Sensarn, Steven

    2013-02-22T23:59:59.000Z

    for beginners in the field. A student may better understand an algorithm by visualizing each step and observing the state of the system over time. While there are many representations of a quantum algorithm, perhaps the most intuitive is the quantum circuit...

  2. Quantum computer of wire circuit architecture

    E-Print Network [OSTI]

    S. A. Moiseev; F. F. Gubaidullin; S. N. Andrianov

    2010-01-07T23:59:59.000Z

    First solid state quantum computer was built using transmons (cooper pair boxes). The operation of the computer is limited because of using a number of the rigit cooper boxes working with fixed frequency at temperatures of superconducting material. Here, we propose a novel architecture of quantum computer based on a flexible wire circuit of many coupled quantum nodes containing controlled atomic (molecular) ensembles. We demonstrate wide opportunities of the proposed computer. Firstly, we reveal a perfect storage of external photon qubits to multi-mode quantum memory node and demonstrate a reversible exchange of the qubits between any arbitrary nodes. We found optimal parameters of atoms in the circuit and self quantum modes for quantum processing. The predicted perfect storage has been observed experimentally for microwave radiation on the lithium phthalocyaninate molecule ensemble. Then also, for the first time we show a realization of the efficient basic two-qubit gate with direct coupling of two arbitrary nodes by using appropriate atomic frequency shifts in the circuit nodes. Proposed two-qubit gate runs with a speed drastically accelerated proportionally to the number of atoms in the node. The direct coupling and accelerated two-qubit gate can be realized for large number of the circuit nodes. Finally, we describe two and three-dimensional scalable architectures that pave the road to construction of universal multi-qubit quantum computer operating at room temperatures.

  3. Dendritic processing within olfactory bulb circuits

    E-Print Network [OSTI]

    Betz, William J.

    Dendritic processing within olfactory bulb circuits Nathan E. Schoppa1 and Nathan N. Urban2 1 of the olfactory bulb. How- ever, the mechanisms by which this map is transformed into an odor code by the bulb circuitry remain unclear. Recent physiological studies in bulb slices have ident- ified several synaptic

  4. Bioluminescent bioreporter integrated circuit detection methods

    DOE Patents [OSTI]

    Simpson, Michael L.; Paulus, Michael J.; Sayler, Gary S.; Applegate, Bruce M.; Ripp, Steven A.

    2005-06-14T23:59:59.000Z

    Disclosed are monolithic bioelectronic devices comprising a bioreporter and an OASIC. These bioluminescent bioreporter integrated circuit are useful in detecting substances such as pollutants, explosives, and heavy-metals residing in inhospitable areas such as groundwater, industrial process vessels, and battlefields. Also disclosed are methods and apparatus for detection of particular analytes, including ammonia and estrogen compounds.

  5. ECE 2100 Circuit Analysis Spring 2011

    E-Print Network [OSTI]

    Miller, Damon A.

    ECE 2100 Circuit Analysis Spring 2011 Exam #1 NAME analysis. #12;© 2011 Damon A. Miller Schematics drawn using LTspice IV (linear.com). Some problems might Schematics drawn using LTspice IV (linear.com). Some problems might be adapted from the course text

  6. Analysis of S-Circuit Uncertainty

    E-Print Network [OSTI]

    Ahmed, Taahir

    2011-08-08T23:59:59.000Z

    INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 viii LIST OF FIGURES FIGURE Page 1 Explanatory figures for Donald?s s-circuit example. . . . . . . . . . . . . 9 2 A representational s... Digraph representations of Donald?s beacon-compass reconfiguration and beacon-only reconfiguration. . . . . . . . . . . . . . . . . . . . . . . . . 30 8 The hardware implementations of the beacon emitter and receiver. . . . . 33 9 The hardware...

  7. Dual-circuit segmented rail phased induction motor

    DOE Patents [OSTI]

    Marder, Barry M. (Albuquerque, NM); Cowan, Jr., Maynard (Albuquerque, NM)

    2002-01-01T23:59:59.000Z

    An improved linear motor utilizes two circuits, rather that one circuit and an opposed plate, to gain efficiency. The powered circuit is a flat conductive coil. The opposed segmented rail circuit is either a plurality of similar conductive coils that are shorted, or a plurality of ladders formed of opposed conductive bars connected by a plurality of spaced conductors. In each embodiment, the conductors are preferably cables formed from a plurality of intertwined insulated wires to carry current evenly.

  8. Trust in analog : analog circuit techniques for reducing the risk of malicious circuits and software

    E-Print Network [OSTI]

    Kuznetsov, Eugene

    2011-01-01T23:59:59.000Z

    Malicious circuits and software present a significant security risk, especially in control applications. This work is concerned with increasing the trustworthiness of control circuitry by reducing its complexity. The ...

  9. Circuit design for embedded memory in low-power integrated circuits

    E-Print Network [OSTI]

    Qazi, Masood

    2012-01-01T23:59:59.000Z

    This thesis explores the challenges for integrating embedded static random access memory (SRAM) and non-volatile memory-based on ferroelectric capacitor technology-into lowpower integrated circuits. First considered is the ...

  10. Derivative-free Robust Optimization for Circuit Design

    E-Print Network [OSTI]

    2013-09-27T23:59:59.000Z

    voltage from a partially lowered battery voltage thereby saving space instead of using multiple batteries to accomplish the same thing. We consider a DC-.

  11. High Temperature, High Voltage Fully Integrated Gate Driver Circuit...

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

    09 DOE Hydrogen Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting, May 18-22, 2009 -- Washington D.C. ape03marlino...

  12. High Temperature, High Voltage Fully Integrated Gate Driver Circuit...

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

    10 DOE Vehicle Technologies and Hydrogen Programs Annual Merit Review and Peer Evaluation Meeting, June 7-11, 2010 -- Washington D.C. ape003tolbert2010p...

  13. EEE 334 Circuits II (4) [F, S] Course (Catalog) description

    E-Print Network [OSTI]

    Zhang, Junshan

    : EEE334 contributes to engineering science through linear and non-linear circuit analysis, problem Prerequisites by Topic: Circuits I Course Objectives: Application of electric network theory to analysis and design of the fundamental non- linear circuits of transistor electronics. Course Outcomes: 1. Apply

  14. Foundations for a Circuit Complexity Theory of Sensory Processing

    E-Print Network [OSTI]

    Maass, Wolfgang

    with linear or almost linear total wire length. 1 Introduction Circuit complexity theory is a classical area in neuromorphic engineering, especially analog VLSI, and the analysis of neural circuits in biological organisms modules'' (i.e., as gates) in our complexity analysis. #12; plexity measures in traditional circuit

  15. Timed Verification of the Generic Architecture of a Memory Circuit

    E-Print Network [OSTI]

    Encrenaz-Tiphène, Emmanuelle

    #cient linear constraints relating the delays of the internal gates of the circuit to the exter­ nal delays on the reachability analysis of a timed model of the circuit (with additional abstract interpretation techniques [10Timed Verification of the Generic Architecture of a Memory Circuit Using Parametric Timed Automata

  16. Verification of the Generic Architecture of a Memory Circuit

    E-Print Network [OSTI]

    Encrenaz-Tiphène, Emmanuelle

    -Cortadella's parametric method for verifying asynchronous circuits, we formally derive a set of linear constraints of sufficient linear constraints relating the delays of the internal gates of the circuit to the external delays on the reachability analysis of a timed model of the circuit (with additional abstract interpretation techniques [11

  17. Circuit Complexity and Multiplicative Complexity of Boolean Functions

    E-Print Network [OSTI]

    no example of an explicit function requiring super linear circuit size. Moreover, only a few proofs of linear (usually by a long case analysis) that for any circuit computing this function setting some variablesCircuit Complexity and Multiplicative Complexity of Boolean Functions Arist Kojevnikov1

  18. Detection and removal of functional redundancy in multi-level logic circuits

    E-Print Network [OSTI]

    Dorsey, David Michael

    2013-02-22T23:59:59.000Z

    circuit. This research will focus on finding non-traditional methods for minimizing multi-level logic circuits....

  19. Advanced Non-Krylov Subspace Model Order Reduction Techniques for Interconnect Circuits

    E-Print Network [OSTI]

    Yan, Boyuan

    2009-01-01T23:59:59.000Z

    Freund. Efficient linear circuit analysis by Pade approxima-for reduced order analysis of linear circuit with multiple

  20. Evaluation of potential severe accidents during low power and shutdown operations at Grand Gulf, Unit 1. Volume 5: Analysis of core damage frequency from seismic events for plant operational state 5 during a refueling outage

    SciTech Connect (OSTI)

    Budnitz, R.J. [Future Resources Associates, Inc., Berkeley, CA (United States); Davis, P.R. [PRD Consulting (United States); Ravindra, M.K.; Tong, W.H. [EQE International, Inc., Irvine, CA (United States)

    1994-08-01T23:59:59.000Z

    In 1989 the US Nuclear Regulatory Commission (NRC) initiated an extensive program to examine carefully the potential risks during low-power and shutdown operations. The program included two parallel projects, one at Sandia National Laboratories studying a boiling water reactor (Grand Gulf), and the other at Brookhaven National Laboratory studying a pressurized water reactor (Surry Unit 1). Both the Sandia and Brookhaven projects have examined only accidents initiated by internal plant faults---so-called ``internal initiators.`` This project, which has explored the likelihood of seismic-initiated core damage accidents during refueling outage conditions, is complementary to the internal-initiator analyses at Brookhaven and Sandia. This report covers the seismic analysis at Grand Gulf. All of the many systems modeling assumptions, component non-seismic failure rates, and human effort rates that were used in the internal-initiator study at Grand Gulf have been adopted here, so that the results of the study can be as comparable as possible. Both the Sandia study and this study examine only one shutdown plant operating state (POS) at Grand Gulf, namely POS 5 representing cold shutdown during a refueling outage. This analysis has been limited to work analogous to a level-1 seismic PRA, in which estimates have been developed for the core-damage frequency from seismic events during POS 5. The results of the analysis are that the core-damage frequency for earthquake-initiated accidents during refueling outages in POS 5 is found to be quite low in absolute terms, less than 10{sup {minus}7}/year.

  1. High density printed electrical circuit board card connection system

    DOE Patents [OSTI]

    Baumbaugh, Alan E. (Aurora, IL)

    1997-01-01T23:59:59.000Z

    A zero insertion/extraction force printed circuit board card connection system comprises a cam-operated locking mechanism disposed along an edge portion of the printed circuit board. The extrusions along the circuit board mate with an extrusion fixed to the card cage having a plurality of electrical connectors. The card connection system allows the connectors to be held away from the circuit board during insertion/extraction and provides a constant mating force once the circuit board is positioned. The card connection system provides a simple solution to the need for a greater number of electrical signal connections.

  2. Dependence of plasma characteristics on dc magnetron sputter parameters

    SciTech Connect (OSTI)

    Wu, S.Z. [Recording Media Operation, Seagate Technology, 47010 Kato Road, Fremont, California 94538 (United States)

    2005-10-15T23:59:59.000Z

    Plasma discharge characteristics of a dc magnetron system were measured by a single Langmuir probe at the center axis of the dual-side process chamber. Plasma potential, floating potential, electron and ion densities, and electron temperature were extracted with varying dc power and gas pressure during sputter deposition of a metal target; strong correlations were shown between these plasma parameters and the sputter parameters. The electron density was controlled mostly by secondary electron generation in constant power mode, while plasma potential reflects the confinement space variation due to change of discharge voltage. When discharge pressure was varied, plasma density increases with the increased amount of free stock molecules, while electron temperature inversely decreased, due to energy-loss collision events. In low-pressure discharges, the electron energy distribution function measurements show more distinctive bi-Maxwellian distribution, with the fast electron temperature gradually decreases with increased gas pressure.

  3. Multilevel cascade voltage source inverter with seperate DC sources

    DOE Patents [OSTI]

    Peng, Fang Zheng (Knoxville, TN); Lai, Jih-Sheng (Blacksburg, VA)

    2002-01-01T23:59:59.000Z

    A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations.

  4. Multilevel cascade voltage source inverter with seperate DC sources

    DOE Patents [OSTI]

    Peng, Fang Zheng (Oak Ridge, TN); Lai, Jih-Sheng (Knoxville, TN)

    1997-01-01T23:59:59.000Z

    A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations.

  5. Multilevel cascade voltage source inverter with seperate DC sources

    DOE Patents [OSTI]

    Peng, Fang Zheng; Lai, Jih-Sheng

    2001-04-03T23:59:59.000Z

    A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations.

  6. Multilevel cascade voltage source inverter with separate DC sources

    DOE Patents [OSTI]

    Peng, F.Z.; Lai, J.S.

    1997-06-24T23:59:59.000Z

    A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations. 15 figs.

  7. This document is a preprint of the paper: L. Meng, T. Dragicevic, J.M. Guerrero, and J.C Vasquez, "Optimization with system damping restoration for droop controlled dc-dc converters," in

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    , "Optimization with system damping restoration for droop controlled dc-dc converters," in Proc. IEEE Energy Restoration for Droop Controlled DC-DC Converters Lexuan Meng, Tomislav Dragicevic, Josep M. Guerrero, Juan C systems and uninterruptable power supply systems. Droop control along with virtual resistance (VR

  8. USCOMM-WB-DC PRELIMZNARY REPORT OH HURRICANE DAISY

    E-Print Network [OSTI]

    QC 945.2 .D3 H8 1958 c.2 #12;#12;USCOMM-WB-DC #12;PRELIMZNARY REPORT OH HURRICANE DAISY AWGUST 24-29, 1958 Hurricane "Daisy", intense but small in area, was detected as a tropical storm about 300 miles into a hurricane on August 25. A u g u s t 27 it drifted very slowly northward. coast increased. the Atlantic off

  9. Disc rotors with permanent magnets for brushless dc motor

    SciTech Connect (OSTI)

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

    1992-05-26T23:59:59.000Z

    This patent describes a brushless dc permanent magnet motor for driving an autonomous underwater vehicle. It comprises first and second substantially flat, generally cylindrical stators disposed in side by side relation; a first substantially flat, generally cylindrical rotor; a first shaft connected to the first rotor and a second, concentric shaft connected to the second rotor; and means for providing rotation of the first and second shafts in opposite directions.

  10. The Use of DC Glow Discharges as Undergraduate Educational Tools

    SciTech Connect (OSTI)

    Stephanie A. Wissel and Andrew Zwicker, Jerry Ross, and Sophia Gershman

    2012-10-09T23:59:59.000Z

    Plasmas have a beguiling way of getting students excited and interested in physics. We argue that plasmas can and should be incorporated into the undergraduate curriculum as both demonstrations and advanced investigations of electromagnetism and quantum effects. Our device, based on a direct current (DC) glow discharge tube, allows for a number of experiments into topics such as electrical breakdown, spectroscopy, magnetism, and electron temperature.

  11. Summary of electric vehicle dc motor-controller tests

    SciTech Connect (OSTI)

    McBrien, E F; Tryon, H B

    1982-09-01T23:59:59.000Z

    Available performance data for production motors are usually of marginal value to the electric vehicle designer. To provide at least a partial remedy to this situation, tests of typical dc propulsion motors and controllers were conducted as part of the DOE Electric Vehicle Program. The objectives of this program were to evaluate the differences in the performance of dc motors when operating with chopper-type controllers and when operating on direct current; and to gain an understanding of the interactions between the motor and the controller which cause these differences. Toward this end, motor-controller tests performed by the NASA Lewis Research Center provided some of the first published data that quantified motor efficiency variations for both ripple-free (straight dc) and chopper modes of operation. Test and analysis work at the University of Pittsburgh explored motor-controller relationships in greater depth. And to provide additional data, 3E Vehicles tested two small motors, both on a dynamometer and in a vehicle, and the Eaton Corporation tested larger motors, using sophisticated instrumentation and digital processing techniques. All the motors tested were direct-current types. Of the separately excited types, seven were series wound and two were shunt wound. One self-excited permanent magnet type was also tested. Four of the series wound motors used brush shifting to obtain good commutation. In almost all cases, controller limitations constrained the test envelope so that the full capability of the motors could not be explored.

  12. A Docking Casette For Printed Circuit Boards

    DOE Patents [OSTI]

    Barringer, Dennis R. (Wallkill, NY); Seminaro, Edward J. (Milton, NY); Toffler, Harold M. (Newburgh, NY)

    2003-08-19T23:59:59.000Z

    A docking apparatus for printed circuit boards including a cassette housing, having a housing base, a housing cover and a housing wall, wherein the housing base and the housing wall are disposed relative to each other so as to define a housing cavity for containing a printed circuit board and wherein the housing wall includes a cable opening disposed so as to be communicated with the housing cavity, a linkage mechanism, wherein the linkage mechanism includes an engagement configuration and a disengagement configuration and wherein the linkage mechanism is disposed so as to be associated with the cassette housing and a housing bezel, wherein the housing bezel is disposed relative to the cassette housing so as to be associated with the cable opening.

  13. TRIAC/SCR proportional control circuit

    DOE Patents [OSTI]

    Hughes, Wallace J. (Boston Lake, NY)

    1999-01-01T23:59:59.000Z

    A power controller device which uses a voltage-to-frequency converter in conjunction with a zero crossing detector to linearly and proportionally control AC power being supplied to a load. The output of the voltage-to frequency converter controls the "reset" input of a R-S flip flop, while an "0" crossing detector controls the "set" input. The output of the flip flop triggers a monostable multivibrator controlling the SCR or TRIAC firing circuit connected to the load. Logic gates prevent the direct triggering of the multivibrator in the rare instance where the "reset" and "set" inputs of the flip flop are in coincidence. The control circuit can be supplemented with a control loop, providing compensation for line voltage variations.

  14. TRIAC/SCR proportional control circuit

    DOE Patents [OSTI]

    Hughes, W.J.

    1999-04-06T23:59:59.000Z

    A power controller device is disclosed which uses a voltage-to-frequency converter in conjunction with a zero crossing detector to linearly and proportionally control AC power being supplied to a load. The output of the voltage-to frequency converter controls the ``reset`` input of a R-S flip flop, while an ``0`` crossing detector controls the ``set`` input. The output of the flip flop triggers a monostable multivibrator controlling the SCR or TRIAC firing circuit connected to the load. Logic gates prevent the direct triggering of the multivibrator in the rare instance where the ``reset`` and ``set`` inputs of the flip flop are in coincidence. The control circuit can be supplemented with a control loop, providing compensation for line voltage variations. 9 figs.

  15. Abstract -This paper presents the coordinated control of distributed energy storage systems (DESSs) in DC micro-grids.

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    ) in DC micro-grids. In order to balance the state-of-charge (SoC) of each energy storage unit (ESU--Droop control; distributed energy storage system (DESS); DC micro-grids; state-of-charge (SoC) I. INTRODUCTION and more popularity [1]. Nowadays DC micro-grids are becoming more attractive with the raise of DC power

  16. Optimal Demand Response in DC Distribution Networks Hamed Mohsenian-Rad, Member, IEEE and Ali Davoudi, Member, IEEE

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    such as photovoltaic systems are essentially DC sources. Battery storage devices are also easier H. Mohsenian

  17. Quantum Heat Engines Using Superconducting Quantum Circuits

    E-Print Network [OSTI]

    H. T. Quan; Y. D. Wang; Yu-xi Liu; C. P. Sun; Franco Nori

    2006-09-14T23:59:59.000Z

    We propose a quantum analog of the internal combustion engine used in most cars. Specifically, we study how to implement the Otto-type quantum heat engine (QHE) with the assistance of a Maxwell's demon. Three steps are required: thermalization, quantum measurement, and quantum feedback controlled by the Maxwell demon. We derive the positive-work condition of this composite QHE. Our QHE can be constructed using superconducting quantum circuits. We explicitly demonstrate the essential role of the demon in this macroscopic QHE.

  18. Progress in radiation immune thermionic integrated circuits

    SciTech Connect (OSTI)

    Lynn, D.K.; McCormick, J.B. (comps.)

    1985-08-01T23:59:59.000Z

    This report describes the results of a program directed at evaluating the thermionic integrated circuit (TIC) technology for applicability to military systems. Previous programs under the sponsorship of the Department of Energy, Office of Basic Energy Sciences, have developed an initial TIC technology base and demonstrated operation in high-temperature and high-radiation environments. The program described in this report has two parts: (1) a technical portion in which experiments and analyses were conducted to refine perceptions of near-term as well as ultimate performance levels of the TIC technology and (2) an applications portion in which the technical conclusions were to be evaluated against potential military applications. This report draws several conclusions that strongly suggest that (1) useful radiation-hard/high-temperature operable integrated circuits can be developed using the TIC technology; (2) because of their ability to survive and operate in hostile environments, a variety of potential military applications have been projected for this technology; and (3) based on the above two conclusions, an aggressive TIC development program should be initiated to provide the designers of future systems with integrated circuits and devices with the unique features of the TICs.

  19. Base drive and overlap protection circuit

    DOE Patents [OSTI]

    Gritter, David J. (Southfield, MI)

    1983-01-01T23:59:59.000Z

    An inverter (34) which provides power to an A. C. machine (28) is controlled by a circuit (36) employing PWM control strategy whereby A. C. power is supplied to the machine at a preselectable frequency and preselectable voltage. This is accomplished by the technique of waveform notching in which the shapes of the notches are varied to determine the average energy content of the overall waveform. Through this arrangement, the operational efficiency of the A. C. machine is optimized. The control circuit includes a microcomputer and memory element which receive various parametric inputs and calculate optimized machine control data signals therefrom. The control data is asynchronously loaded into the inverter through an intermediate buffer (38). A base drive and overlap protection circuit is included to insure that both transistors of a complimentary pair are not conducting at the same time. In its preferred embodiment, the present invention is incorporated within an electric vehicle (10) employing a 144 VDC battery pack (32) and a three-phase induction motor (18).

  20. Programmable Digital Controller for Multi-Output DC-DC Converters with a Time-Shared Inductor

    E-Print Network [OSTI]

    Prodiæ, Aleksandar

    and circuit density, power consumption has become a critical issue in battery operated portable devices of multiple programmable supply voltages for light loads and allows simple implementation of power management Parayandeh, Andrija Stupar, Aleksandar Prodi Laboratory for Low-Power Management and Integrated SMPS

  1. Sandia National Laboratories: electricity outage

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

    Microgrid, Modeling & Analysis, News, News & Events, Partnership, Renewable Energy, SMART Grid, Systems Analysis, Systems Engineering Mayor Says New System Will 'Keep Everyone...

  2. Refinery Outages: First Half 2015

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghurajiConventionalMississippi"site.1 Relative Standard Errors for TableCORPORATION /Product:First

  3. outages | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit withTianlinPapersWindey Wind Home Rmckeel'slinked openreduction+oceanoutages Home

  4. Refinery Outages: First Half 2015

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells,1Stocks Nov-14 Dec-14Table 4.April 25, 20137a.06 2.013

  5. OpenEI Community - outages

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOfRoseConcernsCompany Oil and GasOff<div/0 en

  6. Capacitive charge generation apparatus and method for testing circuits

    DOE Patents [OSTI]

    Cole, E.I. Jr.; Peterson, K.A.; Barton, D.L.

    1998-07-14T23:59:59.000Z

    An electron beam apparatus and method for testing a circuit are disclosed. The electron beam apparatus comprises an electron beam incident on an outer surface of an insulating layer overlying one or more electrical conductors of the circuit for generating a time varying or alternating current electrical potential on the surface; and a measurement unit connected to the circuit for measuring an electrical signal capacitively coupled to the electrical conductors to identify and map a conduction state of each of the electrical conductors, with or without an electrical bias signal being applied to the circuit. The electron beam apparatus can further include a secondary electron detector for forming a secondary electron image for registration with a map of the conduction state of the electrical conductors. The apparatus and method are useful for failure analysis or qualification testing to determine the presence of any open-circuits or short-circuits, and to verify the continuity or integrity of electrical conductors buried below an insulating layer thickness of 1-100 {micro}m or more without damaging or breaking down the insulating layer. The types of electrical circuits that can be tested include integrated circuits, multi-chip modules, printed circuit boards and flexible printed circuits. 7 figs.

  7. Capacitive charge generation apparatus and method for testing circuits

    DOE Patents [OSTI]

    Cole, Jr., Edward I. (Albuquerque, NM); Peterson, Kenneth A. (Albuquerque, NM); Barton, Daniel L. (Albuquerque, NM)

    1998-01-01T23:59:59.000Z

    An electron beam apparatus and method for testing a circuit. The electron beam apparatus comprises an electron beam incident on an outer surface of an insulating layer overlying one or more electrical conductors of the circuit for generating a time varying or alternating current electrical potential on the surface; and a measurement unit connected to the circuit for measuring an electrical signal capacitively coupled to the electrical conductors to identify and map a conduction state of each of the electrical conductors, with or without an electrical bias signal being applied to the circuit. The electron beam apparatus can further include a secondary electron detector for forming a secondary electron image for registration with a map of the conduction state of the electrical conductors. The apparatus and method are useful for failure analysis or qualification testing to determine the presence of any open-circuits or short-circuits, and to verify the continuity or integrity of electrical conductors buried below an insulating layer thickness of 1-100 .mu.m or more without damaging or breaking down the insulating layer. The types of electrical circuits that can be tested include integrated circuits, multi-chip modules, printed circuit boards and flexible printed circuits.

  8. An experimental analogue for memristor based Chua's circuit

    E-Print Network [OSTI]

    R. Jothimurugan; K. Thamilmaran; Ronilson Rocha

    2014-08-21T23:59:59.000Z

    This paper presents the dynamics of a practical equivalent of a smooth memristor oscillator derived from Chua's circuit. This approach replaces the conventional Chua's diode by a flux controlled memristor with negative conductance. The central idea is to design a practical memristor based circuit using electronic analogy in order to bypass problems related to the realization of memristor equivalents. The amplitude and the frequency of the oscillations are previously defined in the circuit design. The result is a robust and flexible circuit without inductors, which is able to reproduce a rich variety of dynamical behaviors. The proposed analogue circuit is successfully designed and implemented, producing experimental time series, phase portraits, and power spectra, which are corroborated by numerical simulations. The "0-1 test" is also performed in order to verify the regular and chaotic dynamics on the proposed analogue circuit.

  9. Constant-Optimized Quantum Circuits for Modular Multiplication and Exponentiation

    E-Print Network [OSTI]

    Igor L. Markov; Mehdi Saeedi

    2015-04-02T23:59:59.000Z

    Reversible circuits for modular multiplication $Cx$%$M$ with $xcircuit depth rather than actual values, producing fairly large circuits not optimized for specific $C$ and $M$ values. In this work, we develop such optimizations in a bottom-up fashion, starting with most convenient $C$ values. When zero-initialized ancilla registers are available, we reduce the search for compact circuits to a shortest-path problem. Some of our modular-multiplication circuits are asymptotically smaller than previous constructions, but worst-case bounds and average sizes remain $\\Theta(n^2)$. In the context of modular exponentiation, we offer several constant-factor improvements, as well as an improvement by a constant additive term that is significant for few-qubit circuits arising in ongoing laboratory experiments with Shor's algorithm.

  10. Hardwired Control Changes For NSTX DC Power Feeds

    SciTech Connect (OSTI)

    Ramakrishnan, S.

    2013-06-28T23:59:59.000Z

    The National Spherical Torus Experiment (NSTX) has been designed and installed in the existing facilities at Princeton Plasma Physics Laboratory (PPPL). Most of the hardware, plant facilities, auxiliary sub-systems, and power systems originally used for the Tokamak Fusion Test Reactor (TFTR) have been used with suitable modifications to reflect NSTX needs. The original TFTR Hardwired Control System (HCS) with electromechanical relays was used for NSTX DC Power loop control and protection during NSTX operations. As part of the NSTX Upgrade, the HCS is being changed to a PLC-based system with the same control logic. This paper gives a description of the changeover to the new PLC-based system __________________________________________________

  11. Superconducting DC and RF Properties of Ingot Niobium

    E-Print Network [OSTI]

    Dhakal, Pashupati; Kneisel, Peter; Myneni, Ganapati Rao

    2012-01-01T23:59:59.000Z

    The thermal conductivity, DC magnetization and penetration depth of large-grain niobium hollow cylindrical rods fabricated from ingots, manufactured by CBMM subjected to chemical and heat treatment were measured. The results confirm the influence of chemical and heat-treatment processes on the superconducting properties, with no significant dependence on the impurity concentrations in the original ingots. Furthermore, RF properties, such as the surface resistance and quench field of the niobium rods were measured using a TE011 cavity. The hollow niobium rod is the center conductor of this cavity, converting it to a coaxial cavity. The quench field is limited by the critical heat flux through the rods' cooling channel.

  12. The dc modeling program (DCMP): Version 2. 0

    SciTech Connect (OSTI)

    Chapman, D.G. (Manitoba HVDC Research Centre, Winnipeg, MB (Canada))

    1990-08-01T23:59:59.000Z

    In this project one of the main objectives was the refinement of tools for the study of HVDC systems. The original software was prepared in project RP1964-2 (EL-4365) as power flow and stability program models for HVDC systems. In this project new modeling capabilities were added to both the power flow and stability models. Additionally, the HVDC specific model capabilities were integrated into a new program, termed the Standalone program, for use in the development and testing of HVDC models. This manual provides technical background for programmers and those interested in understanding, augmenting or transporting the dc models.

  13. Positron lifetime spectrometer using a DC positron beam

    DOE Patents [OSTI]

    Xu, Jun; Moxom, Jeremy

    2003-10-21T23:59:59.000Z

    An entrance grid is positioned in the incident beam path of a DC beam positron lifetime spectrometer. The electrical potential difference between the sample and the entrance grid provides simultaneous acceleration of both the primary positrons and the secondary electrons. The result is a reduction in the time spread induced by the energy distribution of the secondary electrons. In addition, the sample, sample holder, entrance grid, and entrance face of the multichannel plate electron detector assembly are made parallel to each other, and are arranged at a tilt angle to the axis of the positron beam to effectively separate the path of the secondary electrons from the path of the incident positrons.

  14. Category:DC Resistivity Survey (Wenner Array) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, click here. Category:Conceptual Model Add.png Add a newpage?InformationDC

  15. EA-327-A DC Energy, LLC | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny:Revised Finding of No53197EFindingEA-257-CEA-296-B22 Emera EnergyEA-326327-A DC

  16. PowerCentsDC Program Final Report | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOrigin of Contamination in235-1Department of60Power Purchase Agreements PowerPowerCentsDC Program

  17. EA-327-A DC Energy, LLC | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015 Business42.1Energy |Final Site-WideBPAPowerEE US No.Subsidary No. 5 LLCtoDC

  18. EA-377 DC Energy Texas | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the YouTube|6721 Federal Register / Vol. 73, No.Plant for5: Finding7:11:D3 EDF Trading67 DC

  19. DC Resistivity Survey (Dipole-Dipole Array) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia:PowerCER.pngRoofs andCrops Ltd Jump to: navigation, searchDC

  20. MOSFETMOSFET ffTT MOSFET small-signal equivalent circuits

    E-Print Network [OSTI]

    Pulfrey, David L.

    --parametersparameters 1. fT is related to the short-circuit current gain 2. |id/ig|2 = |y23/y33|2 3. Extrapolated f to one using z-parameters 2. It's now easy to add in the parasitic R's 3. fT is related to the short-circuit1 MOSFETMOSFET ffTT LECTURE 17 · MOSFET small-signal equivalent circuits · 2-port parameters · y

  1. Circuit quantum electrodynamics with a nonlinear resonator

    E-Print Network [OSTI]

    P. Bertet; F. R. Ong; M. Boissonneault; A. Bolduc; F. Mallet; A. C. Doherty; A. Blais; D. Vion; D. Esteve

    2011-11-02T23:59:59.000Z

    One of the most studied model systems in quantum optics is a two-level atom strongly coupled to a single mode of the electromagnetic field stored in a cavity, a research field named cavity quantum electrodynamics or CQED. CQED has recently received renewed attention due to its implementation with superconducting artificial atoms and coplanar resonators in the so-called circuit quantum electrodynamics (cQED) architecture. In cQED, the couplings can be much stronger than in CQED due to the design flexibility of superconducting circuits and to the enhanced field confinement in one-dimensional cavities. This enabled the realization of fundamental quantum physics and quantum information processing experiments with a degree of control comparable to that obtained in CQED. The purpose of this chapter is to investigate the situation where the resonator to which the atom is coupled is made nonlinear with a Kerr-type nonlinearity, causing its energy levels to be nonequidistant. The system is then described by a nonlinear Jaynes-Cummings Hamiltonian. This considerably enriches the physics since a pumped nonlinear resonator displays bistability, parametric amplification, and squeezing. The interplay of strong coupling and these nonlinear effects constitutes a novel model system for quantum optics that can be implemented experimentally with superconducting circuits. This chapter is organized as follows. In a first section we present the system consisting of a superconducting Kerr nonlinear resonator strongly coupled to a transmon qubit. In the second section, we describe the response of the sole nonlinear resonator to an external drive. In the third section, we show how the resonator bistability can be used to perform a high-fidelity readout of the transmon qubit. In the last section, we investigate the quantum backaction exerted by the intracavity field on the qubit.

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

    SciTech Connect (OSTI)

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

    1995-03-01T23:59:59.000Z

    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.

  3. COMBINATIONAL-CIRCUITCOMBINATIONAL CIRCUIT BUILDING BLOCKS

    E-Print Network [OSTI]

    Maeng, Seungryoul

    ;Three-input XOR function implemented i h 4 1 l i lwith a 4-to-1 multiplexer 14 0 0 0 w1 w2 w3 f 0 w1 w20Mux)p ( ) multiplexer demultiplexer #12;2-to-1 Mux (Selector)2 to 1 Mux (Selector) 4 f s w0 w1 0 1 0 1 fs w0 w1 f=s'w0+sw1 (a) Graphical symbol 1 (b) Truth table 1 w1 w0 w0 fs w1 w1 f s (c) Sum-of-products circuit (d

  4. Sustainable Energy Utility- D.C. Home Performance (District of Columbia)

    Broader source: Energy.gov [DOE]

    The District of Columbia Sustainable Energy Utility currently offers the D.C. Home Performance program (DCHP). DCHP provides a $500 incentive to properties which successfully complete qualifying...

  5. Washington DC Regions | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Washington DC Regions National Science Bowl (NSB) NSB Home About High School Middle School Middle School Students Middle School Coaches Middle School Regionals Middle School...

  6. Optimizing Energy Savings from Direct-DC in U.S. Residential Buildings

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    currently being entirely off-grid is much more costly andcan operate off the DC Flexzone Grid [20] and are developing

  7. Harnessing the Power of the Sun, Solar Impulse Plane Lands in DC Area

    Broader source: Energy.gov [DOE]

    Today, Secretary Moniz spoke at an event welcoming the arrival of the solar-powered Solar Impulse plane at Dulles International Airport near Washington, D.C.

  8. We Have a Winner - DC High School Regional Science Bowl Competition...

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

    We Have a Winner - DC High School Regional Science Bowl Competition Held Last Saturday Annie Whatley Annie Whatley Deputy Director, Office of Minority Education and Community...

  9. Optimization of spin-torque switching using AC and DC pulses

    SciTech Connect (OSTI)

    Dunn, Tom [Department of Physics, University of Minnesota, Minneapolis, Minnesota 55455 (United States); Kamenev, Alex [Department of Physics, University of Minnesota, Minneapolis, Minnesota 55455 (United States); Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55455 (United States)

    2014-06-21T23:59:59.000Z

    We explore spin-torque induced magnetic reversal in magnetic tunnel junctions using combined AC and DC spin-current pulses. We calculate the optimal pulse times and current strengths for both AC and DC pulses as well as the optimal AC signal frequency, needed to minimize the Joule heat lost during the switching process. The results of this optimization are compared against numeric simulations. Finally, we show how this optimization leads to different dynamic regimes, where switching is optimized by either a purely AC or DC spin-current, or a combination AC/DC spin-current, depending on the anisotropy energies and the spin-current polarization.

  10. Laser Micromachining of Active and Passive Photonic Integrated Circuits

    E-Print Network [OSTI]

    Cho, Seong-Ho

    2006-06-28T23:59:59.000Z

    This thesis describes the development of advanced laser resonators and applications of laserinduced micromachining for photonic circuit fabrication. Two major advantages of laserinduced micromachining are direct patterning ...

  11. analog circuit design: Topics by E-print Network

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

    tutorial will give an overview of the design problems at hand : the leakage power and process variability and their implications for digital circuits and memories, and the...

  12. Design for manufacturability with regular fabrics in digital integrated circuits

    E-Print Network [OSTI]

    Gazor, Mehdi (Seyed Mehdi)

    2005-01-01T23:59:59.000Z

    Integrated circuit design is limited by manufacturability. As devices scale down, sensitivity to process variation increases dramatically, making design for manufacturability a critical concern. Designers must identify the ...

  13. Safety and performance enhancement circuit for primary explosive detonators

    DOE Patents [OSTI]

    Davis, Ronald W. (Tracy, CA)

    2006-04-04T23:59:59.000Z

    A safety and performance enhancement arrangement for primary explosive detonators. This arrangement involves a circuit containing an energy storage capacitor and preset self-trigger to protect the primary explosive detonator from electrostatic discharge (ESD). The circuit does not discharge into the detonator until a sufficient level of charge is acquired on the capacitor. The circuit parameters are designed so that normal ESD environments cannot charge the protection circuit to a level to achieve discharge. When functioned, the performance of the detonator is also improved because of the close coupling of the stored energy.

  14. amplifying circuit targeting: Topics by E-print Network

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

    "linear generating elements. " These authors replaced a set of circuits containing a number of resistors, capacitors, inductors, transformers and gyrators... Hoyle Passano,...

  15. axial motor circuits: Topics by E-print Network

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

    Fundamentals of electromechanical energy conversion. Motors and generators, transformers, single and three- phase power circuits, three-phase induction motor including...

  16. Stochastic Modeling and Analysis of Custom Integrated Circuits

    E-Print Network [OSTI]

    Gong, Fang

    2012-01-01T23:59:59.000Z

    3 Fast Failure Analysis of Memory Circuits in HighIS) . . . . . . . . . . . . . . . . . . Failure Analysis ofSRAM parametric failure analysis. ” In Proc. ACM/IEEE Design

  17. 6.002 Circuits and Electronics, Fall 2000

    E-Print Network [OSTI]

    Lang, Jeffrey (Jeffrey H.)

    Fundamentals of the lumped circuit abstraction. Resistive elements and networks; independent and dependent sources; switches and MOS devices; digital abstraction; amplifiers; and energy storage elements. Dynamics of first- ...

  18. active quenching circuit: Topics by E-print Network

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

    Mario Stipcevic 2008-05-18 3 Splice Resistance Measurements in the LHC Main Superconducting Magnet Circuits by the New Quench Protection System CERN Preprints Summary: The...

  19. advanced microwave circuits: Topics by E-print Network

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

    transition of photons in circuit quantum electrodynamics electrodynamics QED , superconduct- ing qubits are coupled with microwave photons in a trans- mission line and a...

  20. analog integrated circuits: Topics by E-print Network

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

    Academic, ON, DECREASING, and OFF Visual Signals KWABENA BOAHEN Penn Bioengineering, 3320 Smith Walk Boahen, Kwabena 15 Analog Integrated Circuits and Signal Processing, 43,...