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Title: Electric vehicle drive train with contactor protection

Abstract

A drive train for an electric vehicle includes a traction battery, a power drive circuit, a main contactor for connecting and disconnecting the traction battery and the power drive circuit, a voltage detector across contacts of the main contactor, and a controller for controlling the main contactor to prevent movement of its contacts to the closed position when the voltage across the contacts exceeds a predetermined threshold, to thereby protect the contacts of the contactor. The power drive circuit includes an electric traction motor and a DC-to-AC inverter with a capacitive input filter. The controller also inhibits the power drive circuit from driving the motor and thereby discharging the input capacitor if the contacts are inadvertently opened during motoring. A precharging contactor is controlled to charge the input filter capacitor prior to closing the main contactor to further protect the contacts of the main contactor. 3 figures.

Inventors:
;
Issue Date:
Research Org.:
Ford Motor Co
OSTI Identifier:
6666791
Patent Number(s):
5369540 A
Application Number:
PPN: US 8-016777
Assignee:
General Electric Company, Schenectady, NY (United States) IDO; EDB-95-029092
DOE Contract Number:  
AC07-90ID13019
Resource Type:
Patent
Resource Relation:
Patent File Date: 11 Feb 1993
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; ELECTRIC BATTERIES; SWITCHES; ELECTRIC-POWERED VEHICLES; CONTROL SYSTEMS; EQUIPMENT PROTECTION DEVICES; ELECTRICAL EQUIPMENT; ELECTROCHEMICAL CELLS; EQUIPMENT; VEHICLES 330300* -- Advanced Propulsion Systems-- Electric-Powered Systems

Citation Formats

Konrad, C.E., and Benson, R.A. Electric vehicle drive train with contactor protection. United States: N. p., 1994. Web.
Konrad, C.E., & Benson, R.A. Electric vehicle drive train with contactor protection. United States.
Konrad, C.E., and Benson, R.A. Tue . "Electric vehicle drive train with contactor protection". United States.
@article{osti_6666791,
title = {Electric vehicle drive train with contactor protection},
author = {Konrad, C.E. and Benson, R.A.},
abstractNote = {A drive train for an electric vehicle includes a traction battery, a power drive circuit, a main contactor for connecting and disconnecting the traction battery and the power drive circuit, a voltage detector across contacts of the main contactor, and a controller for controlling the main contactor to prevent movement of its contacts to the closed position when the voltage across the contacts exceeds a predetermined threshold, to thereby protect the contacts of the contactor. The power drive circuit includes an electric traction motor and a DC-to-AC inverter with a capacitive input filter. The controller also inhibits the power drive circuit from driving the motor and thereby discharging the input capacitor if the contacts are inadvertently opened during motoring. A precharging contactor is controlled to charge the input filter capacitor prior to closing the main contactor to further protect the contacts of the main contactor. 3 figures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {11}
}