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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.

Inventors:
 [1];  [1]
  1. Roanoke, VA
Issue Date:
Research Org.:
Ford Motor Co
OSTI Identifier:
869627
Patent Number(s):
5369540
Assignee:
General Electric Company (Schenectady, NY)
DOE Contract Number:  
AC07-90ID13019
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
electric; vehicle; drive; train; contactor; protection; traction; battery; power; circuit; main; connecting; disconnecting; voltage; detector; contacts; controller; controlling; prevent; movement; closed; position; exceeds; predetermined; threshold; protect; motor; dc-to-ac; inverter; capacitive; input; filter; inhibits; driving; discharging; capacitor; inadvertently; motoring; precharging; controlled; charge; prior; closing; vehicle drive; traction motor; power drive; electric traction; predetermined threshold; electric vehicle; closed position; drive circuit; drive train; main contact; traction battery; /361/

Citation Formats

Konrad, Charles E, and Benson, Ralph A. Electric vehicle drive train with contactor protection. United States: N. p., 1994. Web.
Konrad, Charles E, & Benson, Ralph A. Electric vehicle drive train with contactor protection. United States.
Konrad, Charles E, and Benson, Ralph A. Sat . "Electric vehicle drive train with contactor protection". United States. https://www.osti.gov/servlets/purl/869627.
@article{osti_869627,
title = {Electric vehicle drive train with contactor protection},
author = {Konrad, Charles E and Benson, Ralph 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

Patent:

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