Feedforward PFC for single-phase boost AC-DC converters

摘要

Two feedforward PFC control circuits for single-phase boost AC-DC converters are described. The control method is that of which the sensed signal of the instantaneous input current is injected into the output voltage feedback control loop. One of the PFC circuits is simple and useful for converters feeding constant loads. The other is the arranged PFC and useful for converters feeding variable loads.