Circuit for controlling demands of high current load

Details Circuit for controlling demands of high current load Circuit for controlling demands of high current load

1978-01-09

1979-07-03

Hix, L. T.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

363124, 2191301, H03K 1756, H05B 7144

Patent

active

041601726

ABSTRACT:
The present circuit controls the high current delivered to a load from a direct current (d.c.) power supply through a pair of power silicon controlled rectifiers (SCRS). For each power SCR there is also employed an associated current conduction control SCR. Each of the current conduction control SCRS acts, when triggered, to terminate the current conduction of its associated power SCR. Each current conduction control SCR is controlled by the provision of current thereto during conduction and non-conduction half cycles of an alternating current source, which operates independently of the d.c. power supply. Accordingly, the occurrence of a current (load) transient, even though it may provide an abundance of current to either of said power SCRS, will not prevent the termination of the current conduction of said power SCR for an excessive period after it should have been turned off.

REFERENCES:
patent: 3098949 (1963-07-01), Goldberg
patent: 3629615 (1971-12-01), Gurwicz
patent: 3999034 (1976-12-01), Barhast
patent: 4071885 (1978-01-01), Bilczo

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