Apparatus and method for d.c. motor control

Details Apparatus and method for d.c. motor control Apparatus and method for d.c. motor control

1991-08-05

1994-02-22

Shoop, Jr., William M.

Electricity: motive power systems

Constant motor current, load and/or torque control

388930, 414725, H02P 700

Patent

active

052890929

ABSTRACT:
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.

REFERENCES:
patent: 3553554 (1971-01-01), Risberg
patent: 3675097 (1972-07-01), Mulligan
patent: 4027215 (1977-05-01), Knight et al.
patent: 4079301 (1978-03-01), Johnson
patent: 4498035 (1985-02-01), Bobeck
patent: 4571668 (1986-02-01), Azusawa et al.

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