Variable frequency controller

Details Variable frequency controller Variable frequency controller

1983-05-04

1989-03-07

Wong, Peter S.

Electric power conversion systems

Frequency conversion without intermediate conversion to d.c.

With automatic frequency control

323235, H02M 502

Patent

active

048111937

ABSTRACT:
A circuit for operating an electromagnet of a feeder or vibrator incorporate phase control for a triac used for oscillating the feeder at line frequency or at a selectable subharmonic frequency.

REFERENCES:
patent: 3649893 (1972-03-01), Lajoie
patent: 3908158 (1975-09-01), Studtman
patent: 3950657 (1976-04-01), Sheng et al.
patent: 4084155 (1978-04-01), Herzl et al.
patent: 4204141 (1980-05-01), Nuver
patent: 4231104 (1980-10-01), St. Clair
patent: 4337509 (1982-06-01), Omae et al.

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