A Single Transistor Three Phase Resonant Switch for High Quality Rectification

Existing 34, ac-dc low-harmonic rectiifiers are costly and require complex control schemes to minimize input current harmonics. Introduced here are three new classes of low cost 34, acdc high power factorllow harmonic controlled rectifiers. These are derived from parent dc-dc convrter topologies containing boost-type inputs, buck-type inputs and qwsi resonant zero-current-switch (ZCS) buck-type inputs. With a single active switch in addition to the diode bridge rectijier, the converters are capable of drawing a high quality input current waveform naturally at nearly unity power factor. Thus a simple 34, ac-dc high paver factor rechifie7 is obtained. Simulation and experimental results are supplied to demonstrate the validity of the concept.