Phase line derived cosine-wave generator and gate pulse generato

Details Phase line derived cosine-wave generator and gate pulse generato Phase line derived cosine-wave generator and gate pulse generato

1980-12-17

1983-05-24

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307261, 307262, 363129, 363160, H03K 1772, H03K 364

Patent

active

043852424

ABSTRACT:
In accordance with the present invention, a single line-frequency sync signal is used to derive cosine-crossover type gating angle reference waves, each with additional phase shifting accounting for phase shifts introduced by the system, such as the power transformers associated with the several thyristors in the sequence. A common variable voltage control signal and comparator are used to apply the various gating signals to the thyristor multiplexer and driver circuits. A plurality of switches controlled by the firing logic circuit establishes the order of selection between the cosine reference waves to be generated.

REFERENCES:
patent: 3932771 (1976-01-01), Bucek et al.
patent: 3983495 (1976-09-01), Epstein
patent: 4017744 (1977-04-01), Johnson
patent: 4173722 (1979-11-01), Detering

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