Control system for an electric vehicle

Details Control system for an electric vehicle Control system for an electric vehicle

1998-03-09

1999-12-14

Martin, David

Electricity: motive power systems

Battery-fed motor systems

318801, 318811, H02P 100

Patent

active

060022213

ABSTRACT:
A system is provided to clearly determine a problem in the discharge of a capacitor provided for an inverter of an electric vehicle and its cause. If a capacitor voltage drops below a predetermined value at the end of a first predetermined time period after a main contactor is turned off, it is determined that the main contactor and a discharge circuit are normal. If the capacitor voltage drops below the predetermined value for the first time after a second predetermined time period, it is determined that the discharge circuit has failed and discharge is performed by a discharge resistor. If the capacitor voltage is still above the predetermined value after the second predetermined time period, it is determined that the main contactor has failed and is fixed in a turned-on state.

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