Speed controls for electric motors

Details Speed controls for electric motors Speed controls for electric motors

1974-12-10

1976-08-31

Rubinson, Gene Z.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318230, 318231, H02P 540

Patent

active

039783839

ABSTRACT:
A digital speed control system for an induction motor comprising means producing pulses proportional in frequency to desired motor speed connected to motor speed setting means that generate a series of waveforms to selectively switch an inverter to produce an induction motor power supply, said motor speed pulse producing means also being connected to motor voltage control means that modulates the output of the motor speed setting means such that the output voltage of the inverter is directly proportional to the frequency of the induction motor power supply.

REFERENCES:
patent: 3392316 (1968-07-01), Salihi
patent: 3406325 (1968-10-01), Rosa
patent: 3423662 (1969-01-01), Schlabach et al.
patent: 3569805 (1971-03-01), Hammond
patent: 3611086 (1971-10-01), Mokrytzki

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