Variable slip drive system for induction motor

Details Variable slip drive system for induction motor Variable slip drive system for induction motor

1983-06-03

1984-07-10

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318314, 318807, H02P 540

Patent

active

044595336

ABSTRACT:
A variable slip drive system for driving a variable speed induction motor. The system includes a tachometer for providing a signal proportional to the speed of the motor and a slip oscillator. The output of the tachometer and slip oscillator are combined by a motor drive oscillator to provide a motor drive signal. The frequency of the motor drive signal equals the tachometer signal, less the frequency of the slip signal. The motor drive signal is converted into a proportional, three-phase, high power signal for powering the motor. The frequency of the slip signal is controlled so as to be proportional to the motor speed as a means of optimizing the motor's performance.

REFERENCES:
patent: 4286203 (1981-08-01), Ehret
Dewaan et al., "Slip Speed Control in an Induction Motor with a Phase Reduced Loop," Conference Industry Applications Society IEEE-IAS Annual Meeting, Cleveland, OH, U.S.A., (Sep. 30-Oct. 4, 1979), pp. 952-955.

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