POWER SUPPLY CIRCUIT FOR DRIVING GATE OF ELECTRIC TRAIN

摘要

PURPOSE: A power supply circuit is provided to simply a circuit design and to reduce a defect probability, by eliminating a dedicated IC device. CONSTITUTION: An AC/DC rectifier rectifies an AC voltage into a DC voltage and supplies a rectified voltage to a rapid switch circuit part. The rapid switch circuit part supplies the rectified DC voltage from the AC/DC rectifier to a gate circuit part. The gate circuit part isolates a power device from a power supply circuit so as to control a switch operation stably. A power of 15V is supplied to an output side using a flyback manner.