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Title: Base drive and overlap protection circuit

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 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).

Inventors:
 [1]
  1. (Southfield, MI)
Issue Date:
OSTI Identifier:
864482
Patent Number(s):
4371824
Assignee:
Eaton Corporation (Cleveland, OH) OSTI
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
base; drive; overlap; protection; circuit; inverter; 34; provides; power; machine; 28; controlled; 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; microcomputer; memory; element; receive; various; parametric; inputs; calculate; data; signals; therefrom; asynchronously; loaded; intermediate; buffer; 38; included; insure; transistors; complimentary; pair; conducting; time; preferred; embodiment; incorporated; electric; vehicle; 10; 144; vdc; battery; pack; 32; three-phase; induction; motor; 18; protection circuit; control data; average energy; provides power; induction motor; memory element; base drive; control circuit; electric vehicle; preferred embodiment; control strategy; data signals; data signal; energy content; receive various; pwm control; waveform notching; three-phase induction; strategy whereby; vdc battery; various parametric; machine control; preselectable frequency; preselectable voltage; operational efficiency; parametric inputs; overall waveform; optimized machine; battery pack; complimentary pair; employing pwm; intermediate buffer; selectable frequency; dc battery; /318/361/363/

Citation Formats

Gritter, David J. Base drive and overlap protection circuit. United States: N. p., 1983. Web.
Gritter, David J. Base drive and overlap protection circuit. United States.
Gritter, David J. Sat . "Base drive and overlap protection circuit". United States. https://www.osti.gov/servlets/purl/864482.
@article{osti_864482,
title = {Base drive and overlap protection circuit},
author = {Gritter, David J.},
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 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).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {1}
}

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