Phase-regulated switching circuit

Details Phase-regulated switching circuit Phase-regulated switching circuit

G - Physics

05

F

323/10, 318/120,

G05F 1/455 (2006.01)

Patent

CA 1223636

Abstract of the Disclosure The present invention relates to a phase-regulated zero-crossover ac switching circuit. The present switching circuit comprises the compo- nents of (a) regulator having a time constant; (b) ac Wheatstone bridge connected with the regulator and amplifier, which bears in one arm a vari- able resistance; (c) amplifier for an unbalanced voltage generated in the Wheatstone bridge; (d) a device for supplying dc energy to the regulator and amplifier; and (e) thyristor driven by the amplifier, wherein said compo- nents are connected in a manner such that said thyristor is not conducted at the moment when an ac power supply is coupled, and that the current through thyristor starts from a zero-crossover of ac sine wave and success- ively increases to the prescribed level within a period determined by the time constant of the regulator.

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