Forced commutation chopper having current limit

Details Forced commutation chopper having current limit Forced commutation chopper having current limit

1975-09-11

1976-11-23

Dobeck, Benjamin

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318341, 318345, H02P 706

Patent

active

039939421

ABSTRACT:
A forced commutation chopper control for regulating speed of a DC series tractive motor limits peak motor current by sensing the voltage across the commutation capacitor during the on-time of the current pulses and gating the commutation SCR on in response to a predetermined magnitude of sensed voltage to thereby terminate current pulses to the motor.

REFERENCES:
patent: 3373331 (1968-03-01), Dow
patent: 3551774 (1970-12-01), Rusch
patent: 3899041 (1975-08-01), Mager
patent: 3936711 (1976-02-01), Gay
patent: 3944900 (1976-03-01), Rohsler

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