Controlled rectifier equipment with sinusoidal waveform supply current

摘要

A controlled rectifier equipment with sinusoidal waveform supply current is provided, in which equipment an inexpensive AC current transformer can be used as an AC current detector. The AC current transformer is used as an AC current detector. A DC component eliminating circuit including a low pass filter which cuts off the frequency component of commercial AC power supply is arranged on the line between an current controller in a current control system and a modulation circuit in the conduction control signal generating circuit. The circuit is formed so that a DC offset component which is generated in a controlled rectifier equipment may be eliminated.