Zero crossing phase fired controller

Details Zero crossing phase fired controller Zero crossing phase fired controller

1980-06-19

1982-01-19

Shoop, William M.

Electricity: power supply or regulation systems

Input level responsive

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

323326, 323902, G05F 500

Patent

active

043119565

ABSTRACT:
A phase fired controller is provided for eliminating large shifts in the firing angle due to line voltage variations. Another advantage of the controller is that variations resulting from parts tolerances are reduced substantially. This is accomplished by controlling the output of a capacitor that supplies a voltage to a comparator. The system has particular utility when used as a dimmer controller of an electrostatic copier.

REFERENCES:
patent: 3621373 (1971-11-01), Mitchell et al.
patent: 3821634 (1974-06-01), Sabolic
patent: 3932770 (1976-01-01), Fantozzi

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