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Title: PWM Inverter control and the application thereof within electric vehicles

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 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). 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. (Bloomfield Hills, MI)
Publication Date:
OSTI Identifier:
864137
Patent Number(s):
US 4316132
Assignee:
Eaton Corporation (Cleveland, OH) OSTI
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
pwm; inverter; control; application; electric; vehicles; 34; provides; power; machine; 28; controlled; circuit; 36; employing; strategy; whereby; supplied; preselectable; frequency; voltage; accomplished; technique; waveform; notching; shapes; notches; varied; determine; average; energy; content; overall; arrangement; operational; efficiency; optimized; micro-computer; memory; element; receive; various; parametric; inputs; calculate; data; signals; therefrom; asynchronously; loaded; intermediate; buffer; 38; preferred; embodiment; incorporated; vehicle; 10; 144; vdc; battery; pack; 32; three-phase; induction; motor; 18; control data; average energy; provides power; induction motor; memory element; control circuit; electric vehicle; preferred embodiment; control strategy; data signals; data signal; electric vehicles; 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; employing pwm; intermediate buffer; selectable frequency; dc battery; /318/

Citation Formats

Geppert, Steven. PWM Inverter control and the application thereof within electric vehicles. United States: N. p., 1982. Web.
Geppert, Steven. PWM Inverter control and the application thereof within electric vehicles. United States.
Geppert, Steven. Fri . "PWM Inverter control and the application thereof within electric vehicles". United States. https://www.osti.gov/servlets/purl/864137.
@article{osti_864137,
title = {PWM Inverter control and the application thereof within electric vehicles},
author = {Geppert, Steven},
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 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). 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 = {1982},
month = {1}
}

Patent:

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