Phase-controlled automatic switching circuit

Details Phase-controlled automatic switching circuit Phase-controlled automatic switching circuit

1986-05-28

1987-12-01

Salce, Patrick R.

Electricity: power supply or regulation systems

Output level responsive

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

323265, 323365, 323370, G05F 1455

Patent

active

047106980

ABSTRACT:
There is disclosed a phase-controlled switching circuit, comprising a controlled rectifier (e.g. bidirectional triode thyristor); an amplifier connected at its output terminal to the gate of the controlled rectifier; an ac Wheatstone bridge having at one of its arms a variable resistance (e.g. thermistor to CdS photoconductive cell), said ac Wheatstone bridge being connected at one branch to the input terminal of the amplifier and at its other branch between the cathode and anode of the controlled rectifier through a load; a time constant circuit connected with the variable resistance; a pair of mechanical contacts (e.g. relay) connected in parallel with the controlled rectifier and a dc source for electrifying the whole circuit.

REFERENCES:
patent: 3935505 (1976-01-01), Spiteri
patent: 4008416 (1977-02-01), Nakasone
patent: 4563592 (1986-01-01), Yuhasz et al.
patent: 4574230 (1986-03-01), Masaki

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