Apparatus and method for d.c. motor control

H - Electricity – 02 – P

Patent

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Details

H02P 7/298 (2006.01) H02P 7/00 (2006.01) H02P 7/295 (2006.01)

Patent

CA 2070369

A control for a d.c. motor having a d.c. thyristor power supply connected to a d.c. motor and a control circuit for selectively varying and controlling the level of the current provided by the thyristor power supply to the motor. The thyristor power supply provides a plurality of selected output current levels to the motor and the motor has a corresponding plurality of torque levels. The level of the output current supplied by the power supply to the motor is independent of the resistance in the motor circuit. The motor is rotatable in opposite directions and the thyristor power supply will provide output voltage at opposite pluralities corresponding to the rotational direction of the motor.

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