Motor driven actuator speed control

Details Motor driven actuator speed control Motor driven actuator speed control

1990-03-19

1990-11-13

Ro, Bentsu

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

Armature control by digital or combined analog and digital...

318127, 318272, 318481, 303 3, 303115, 303DIG4, B60T 842, G05F 110

Patent

active

049697560

ABSTRACT:
Controlled movement of a motor driven pressure modulator is provided by commanding maximum current to the motor by application of system voltage resulting in the motor current initially rising rapidly to the motor stall current. The motor accelerates at a rate that is a function of the difference between the motor torque and the load torque represented by the load on the modulator. As the motor speed increases, the motor current decreases. When the motor current decreases below the stall current by a predetermined amount representing a predetermined speed of the motor, the motor current is turned off for a wait period that is based upon the time that it took for the motor speed to attain the predetermined speed. Thereafter, maximum motor current is again commanded and the cycle repeated to provide for motor speed control.

REFERENCES:
patent: 4494624 (1985-01-01), Scheuerle et al.

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