Regenerative braking system for a chopper controlled electric tr

Details Regenerative braking system for a chopper controlled electric tr Regenerative braking system for a chopper controlled electric tr

1976-10-18

1978-06-13

Schaefer, Robert K.

Electricity: motive power systems

Braking

Dynamic braking

318381, H02P 314

Patent

active

040951545

ABSTRACT:
A highly regenerative electrical brake control system including a variable time ratio power conditioning circuit for regulating braking effort of a direct current electric traction motor in a traction vehicle. The system includes a plurality of switches adapted for connecting the power conditioning circuit in a series path between the motor and a power source during high speed braking whereby the power conditioning circuit steps-down the motor generated voltage magnitude to match the power source voltage magnitude without using series connected resistors for voltage dropping. During low speed brake the switches are effective to reconnect the power conditioning circuit in a shunt arrangement with the motor whereby the motor voltage magnitude may be stepped-up to match the higher voltage magnitude of the power source. In a further embodiment provision is made for blending of dynamic and regenerative electrical braking when the power source is not totally receptive to motor generated current.

REFERENCES:
patent: 3818296 (1974-06-01), Torii

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