Pulsed thyristor trigger control circuit

Details Pulsed thyristor trigger control circuit Pulsed thyristor trigger control circuit

G - Physics

05

F

323/10, 323/20

G05F 1/70 (2006.01) H02J 3/18 (2006.01) H02P 23/00 (2006.01)

Patent

CA 1171907

Abstract A trigger control circuit for producing firing pulses for the thyristor of a power factor controller. The control circuit overcomes thyristor triggering problems involved with the current lag associated with controlling inductive loads and utilizes a phase difference signal, already present in the power factor controller, to derive a signal for inhibiting generation of a firing pulse until no load current is flowing from the preceding half cycle, thereby ensuring that the thyristor is triggered on during each half cycle.

399938

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