Zero crossing phase fired controller

Details Zero crossing phase fired controller Zero crossing phase fired controller

G - Physics

05

F

323/10

G05F 1/44 (2006.01) G01R 19/175 (2006.01) H02M 5/257 (2006.01) H03K 5/1536 (2006.01)

Patent

CA 1165391

ZERO CROSSING PHASE FIRED CONTROLLER The Abstract of Disclosure 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 accom- plished 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.

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