Voltage and frequency-controlled AC wave modifier

Details Voltage and frequency-controlled AC wave modifier Voltage and frequency-controlled AC wave modifier

1979-05-29

1983-05-03

Pellinen, A. D.

Electricity: power supply or regulation systems

Output level responsive

Phase controlled switching using electronic tube or a three...

318812, 323244, G05F 1455, H02P 736

Patent

active

043822231

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 sine 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: 3243689 (1966-03-01), Perrins
patent: 3320518 (1967-05-01), Weiss
patent: 3590365 (1971-06-01), Nelson
patent: 3836839 (1974-09-01), Becky
RCA Application Note ICAN-6158, May 1971, 12 Pages.

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