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Title: EV drivetrain inverter with V/HZ optimization

Abstract

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 micro-computer which calculates optimized machine control data signals from various parametric inputs and during steady state load conditions, seeks a best V/HZ ratio to minimize battery current drawn (system losses) from a D.C. power source (32). In the preferred embodiment, the present invention is incorporated within an electric vehicle (10) employing a 144 VDC battery pack and a three-phase induction motor (18).

Inventors:
 [1];  [2]
  1. Southfield, MI
  2. Birmingham, MI
Issue Date:
OSTI Identifier:
865858
Patent Number(s):
4590413
Assignee:
Eaton Corporation (Cleveland, OH)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B60 - VEHICLES IN GENERAL B60L - PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
drivetrain; inverter; hz; optimization; 34; provides; power; machine; 28; controlled; circuit; 36; employing; pwm; control; strategy; whereby; supplied; preselectable; frequency; voltage; accomplished; technique; waveform; notching; shapes; notches; varied; determine; average; energy; content; overall; arrangement; operational; efficiency; optimized; micro-computer; calculates; data; signals; various; parametric; inputs; steady; load; conditions; seeks; ratio; minimize; battery; current; drawn; losses; source; 32; preferred; embodiment; incorporated; electric; vehicle; 10; 144; vdc; pack; three-phase; induction; motor; 18; control data; average energy; provides power; induction motor; control circuit; electric vehicle; power source; preferred embodiment; control strategy; data signals; data signal; energy content; pwm control; waveform notching; three-phase induction; strategy whereby; vdc battery; various parametric; load conditions; machine control; preselectable frequency; preselectable voltage; operational efficiency; parametric inputs; overall waveform; optimized machine; battery pack; employing pwm; selectable frequency; dc battery; current drawn; /318/

Citation Formats

Gritter, David J, and O'Neil, Walter K. EV drivetrain inverter with V/HZ optimization. United States: N. p., 1986. Web.
Gritter, David J, & O'Neil, Walter K. EV drivetrain inverter with V/HZ optimization. United States.
Gritter, David J, and O'Neil, Walter K. Wed . "EV drivetrain inverter with V/HZ optimization". United States. https://www.osti.gov/servlets/purl/865858.
@article{osti_865858,
title = {EV drivetrain inverter with V/HZ optimization},
author = {Gritter, David J and O'Neil, Walter K},
abstractNote = {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 micro-computer which calculates optimized machine control data signals from various parametric inputs and during steady state load conditions, seeks a best V/HZ ratio to minimize battery current drawn (system losses) from a D.C. power source (32). In the preferred embodiment, the present invention is incorporated within an electric vehicle (10) employing a 144 VDC battery pack and a three-phase induction motor (18).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

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