Microprocessor based motor control

Details Microprocessor based motor control Microprocessor based motor control

1988-12-09

1990-10-09

Shoop, Jr., William M.

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

Field control, or field and armature control, by analog...

318434, 318490, 318569, 388812, H02P 728

Patent

active

RE0333794

ABSTRACT:
A microprocessor based motor controller which provides open loop speed control at low conduction angles, closed loop speed control at high conduction angles, and a smooth transition between open loop and closed loop zones. In open loop, the motor speed is selected and is permitted to vary with applied load. In closed loop, the motor speed is held constant, substantially irrespective of load. In the transition zone, the motor is operated in a hybrid open loop, closed loop fashion.
Anti-kickback protection is also provided based on a percentage change in the motor's rotational period.

REFERENCES:
patent: 4147966 (1979-04-01), Kain et al.
patent: 4267914 (1981-05-01), Saar
patent: 4307325 (1981-12-01), Saar
patent: 4317176 (1982-02-01), Saar et al.
patent: 4417189 (1983-11-01), Overfield
patent: 4513381 (1985-04-01), Houser et al.
patent: 4550277 (1985-10-01), Carney

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