A single transistor three phase resonant switch for high quality rectification

Abstract

Three new classes of low-cost 3 phi AC-DC high-power-factor/low-harmonic controlled rectifiers are derived from parent DC-DC power converter topologies containing boost-type inputs, buck-type inputs, and quasi-resonant zero-current-switch (ZCS) buck-type inputs. With a single active switch in addition to the diode bridge rectifier, the converters are capable of drawing a high-quality input-current waveform naturally at nearly unity power factor. Thus a simple 3 phi AC-DC high power factor rectifier is obtained. Simulation and experimental results are supplied to demonstrate the validity of the concept.<>