Induction motor speed control apparatus

Details Induction motor speed control apparatus Induction motor speed control apparatus

1973-12-18

1976-08-03

Rubinson, Gene Z.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318211, 318212, 318227, 318230, H02P 140

Patent

active

039731758

ABSTRACT:
An apparatus for controlling the speed of an induction motor is disclosed which comprises an induction motor, a load coupled to the induction motor which has a negative polarity, a difference signal generating device for generating a difference signal between a signal corresponding to the speed of the load and a predetermined speed command signal, a signal converting device for presetting, prior to the deceleration of the load, a signal necessary to allow the motor to produce a rotating torque corresponding to the load, a voltage applying device for applying to the motor a voltage corresponding to the difference signal while the load is being accelerated, and a saturation signal generating device for generating a signal which saturates the voltage applying device. A rated voltage is applied to the motor by the saturation signal after the load is accelerated, and the saturation signal ceases at the beginning of decelerating the load. The motor is thereby caused to produce a rotating torque corresponding to the output of the signal converting device.

REFERENCES:
patent: 3514682 (1970-05-01), Corey
patent: 3596156 (1971-07-01), Davey
patent: 3678355 (1972-07-01), Bucek et al.
patent: 3708734 (1973-01-01), Rowe

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