Energy economizer for induction motors

Details Energy economizer for induction motors Energy economizer for induction motors

1978-06-21

1980-02-26

Rubinson, Gene Z.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318812, H02P 736

Patent

active

041907930

ABSTRACT:
A standard, unmodified AC induction motor has its stator winding energized from a sine wave power source through a signal-responsive wave modifier operative to control the portion of each cycle of the swine wave which is coupled from said source to the stator winding. Load detecting means, comprising a comparatively small AC generator coupled to the rotor of the motor, produces a control signal, varying with variations in the load on the motor, for controlling the wave modifier to increase the field density of the stator winding with increases in load on the motor, and to decrease the field density of the stator winding with decreases in said load.

REFERENCES:
patent: 3470436 (1969-09-01), Steele
patent: 3553553 (1971-01-01), Truemper
patent: 3560825 (1971-02-01), Elliott
patent: 3786328 (1974-01-01), Bos
patent: 3855509 (1974-12-01), Wright

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