Synchronous switch control circuit

Details Synchronous switch control circuit Synchronous switch control circuit

1976-01-20

1977-03-01

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307235E, 307215, H03K 1700

Patent

active

040103862

ABSTRACT:
A switching circuit for controlling the selective electrical energization of a resistive or inductive load by an AC power source such that a switching operation is performed only when the current from the AC power source is nearly zero. Pulses synchronous with the zero crossings of the AC power source are used to trigger one-shots to effectuate appropriately gated delay pulses when the switching circuit is ON and OFF, respectively. A latching circuit connected to an ON-OFF switch activates and deactivates the switching circuit.

REFERENCES:
patent: 3881118 (1975-04-01), Forrest et al.
patent: 3925688 (1975-12-01), Kalfus
patent: 3950657 (1976-04-01), Sheng et al.

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