Detection circuit of a thyristor three-phase AC voltage controller

摘要

PURPOSE: A detection circuit of a thyristor type three phase AC voltage controller is provided, which can be constituted with a simple circuit appropriate for a system, and can insulate electrically between a power circuit and a control circuit. CONSTITUTION: A thyristor type three phase AC voltage control circuit(100) is constituted with a power circuit part(102) comprising a thyristor circuit part(104) according to each function, a voltage detection circuit part(106,108) and a current detection circuit part(110,112,114). The power circuit part uses a three phase AC voltage as an input, the circuit is constituted by connecting two thrystors in a reversely parallel each other per each phase. An R-L load(101) is usually connected to an output part of the control circuit and the load can be a transformer, an induction motor and a heater.