Electric vehicle protection scheme

Details Electric vehicle protection scheme Electric vehicle protection scheme

1982-05-27

1984-05-15

Dobeck, B.

Electricity: motive power systems

Battery-fed motor systems

318345R, 318506, 361 90, H02P 516

Patent

active

044490801

ABSTRACT:
A fault detection and inhibit circuit for a power control unit in an electric traction motor propelled vehicle of the type wherein the power control unit includes a chopper circuit and a bypass contactor for shunting the chopper circuit when its percent conduction exceeds a relatively high value and a main contactor for connecting the chopper circuit and motor to a power source. The circuit assures that neither the main contactor, the bypass contactor nor the chopper circuit are in a shorted condition before permitting the application of power to the system. In the event of a running failure, the circuit prevents restarting until the failed condition has recovered.

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patent: 4200832 (1980-04-01), Johansson et al.
patent: 4262238 (1981-04-01), Schwarz et al.

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