Bypass contactor control

Details Bypass contactor control Bypass contactor control

1974-06-19

1976-07-06

Dobeck, B.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318139, H02P 100

Patent

active

039684148

ABSTRACT:
A system for operating a bypass contactor in a time-ratio DC to DC control vehicle drive system. In order that the contactor be energized, it is necessary that the voltage across the motor exceed some minimum value, and that directional contactors be closed. A manual bypass switch and a speed control monitoring portion of the system are arranged in a logical OR configuration so that a third condition is fulfilled when either a mark-space ratio of the motor control system exceeds a predetermined value, or a fixed period of time elapses after manual closure of a bypass demand switch.

REFERENCES:
patent: 3349309 (1967-10-01), Dannttell
patent: 3500161 (1970-03-01), Domann et al.
patent: 3517290 (1970-06-01), Gunsser
patent: 3764810 (1973-10-01), Morton et al.
patent: 3818291 (1974-06-01), Miyake
patent: 3826959 (1974-07-01), Anderson

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