Constant-frequency active filter for power factor correcting techniques, has voltage controller with microcomputer to output current command to control clock signal output from PWM control unit of current controller

摘要

A current controller (30) connected to a voltage setup unit (10), has a PWM control unit (40) which outputs a clock signal for controlling photocoupler (31) and a transistor (17). A voltage controller (20) connected to the current controller, has a microprocessor (21) which outputs a current command to control the clock signal.