Analog dc motor velocity control loop

Details Analog dc motor velocity control loop Analog dc motor velocity control loop

H - Electricity

02

P

318/93

H02P 7/29 (2006.01)

Patent

CA 1143785

ANALOG DC MOTOR VELOCITY CONTROL LOOP Abstract of the Disclosure A pulse width modulated DC motor control system is designed to operate a DC motor at constant velocity. Feedback pulses generated at a rate proportional to the rotational velocity of the motor are converted to control pulses having a fixed on-time period which is independent of changes in the velocity of the motor. The control pulses are used to modulate a constant current source whose output is integrated to generate a sawtooth voltage signal whose average DC value is used as the basis for pulse width modulating a DC voltage applied to the motor drive circuits of a DC motor. EN977026

335624

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