Integral cycle, precise zero voltage switch

Details Integral cycle, precise zero voltage switch Integral cycle, precise zero voltage switch

1974-10-10

1976-05-11

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307235E, H03K 1706, H03K 5153

Patent

active

039566447

ABSTRACT:
Alternating current from a source is supplied to a load through a thyristor whose gate electrode is controlled by the output from a zero voltage switch. The zero voltage switch is enabled by the output of a flip-flop beginning at the simultaneous occurrence of a command input and a clock signal input to the flip-flop. The clock signal input is generated just before the beginning of each half cycle of a predetermined polarity of the alternating current so that integral cycling is achieved without delayed switching which would produce current spikes.

REFERENCES:
patent: 3506852 (1970-04-01), Hart
patent: 3633094 (1972-01-01), Clements
patent: 3657565 (1972-04-01), Leyten

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