Induction motor control

Electricity: motive power systems – Induction motor systems – Primary circuit control

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318778, H02P 736, H02P 116

Patent

active

044700016

ABSTRACT:
An induction motor operating system having a pulse width modulation operating system and a time domain signal generating system.
The induction motor is operated from the time domain system to provide extremely large motor starting forces compared to the nominal motor force. Opposite ends of each of first, second and third motor windings are connected across a D.C. power supply and individual power supply. Waveforms are supplied to said respective motor windings during a predetermined brief interval. The first waveform, supplied to a first winding, is configured such that current initially flows through the first winding to establish a first magnetic field in the motor. The second and third waveforms are configured so that current is supplied to the second and third windings after establishment of the first magnetic field to establish second and third magnetic fields reacting with the first magnetic field to create a motive force acting on the moving element of the motor.

REFERENCES:
patent: 3670237 (1972-06-01), Hubel
patent: 3742333 (1973-06-01), Yurick
patent: 4114073 (1978-09-01), Uzuka
patent: 4214194 (1980-07-01), Horning
patent: 4251758 (1981-02-01), Pedersen
patent: 4300084 (1981-11-01), Heeren
Hazony, Dov, "Pulse Control in Dynamic Systems," Academic Press, Inc., pp. 75-85.
Goto, Tatsuo and Yasuharu Tamuro, "Three Phase Induction Motor Impulse Drive Method," IEEE.

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