Pulsed thyristor trigger control circuit

Details Pulsed thyristor trigger control circuit Pulsed thyristor trigger control circuit

1981-11-30

1984-01-17

Pellinen, A. D.

Electricity: power supply or regulation systems

Output level responsive

Phase controlled switching using electronic tube or a three...

318799, 323246, H02P 540

Patent

active

044266146

ABSTRACT:
A trigger control circuit is provided for producing firing pulses for the thyristor of thyristor control system such as 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, in deriving a signal for inhibiting generation of a firing pulse until no load current is flowing from the preceding half cycle and thereby ensuring that the thyristor is triggered on during each half cycle.

REFERENCES:
patent: 4052648 (1977-10-01), Nola
patent: 4266177 (1981-05-01), Nola
patent: 4271387 (1981-06-01), Mukai et al.
patent: 4379254 (1983-04-01), Hurban

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