OSAKA converter - large scale three-phase soft-switching power factor corrected converter

OSAKA converter, which is a large scale three-phase soft-switching power factor corrected converter, is proposed. The converter switches once in every half cycle of an AC commercial power source. Therefore, it can solve many problems caused by the high frequency operation. The proposed converter achieves the soft-switching operation and the EMI noise can be reduced. In this circuit, resonant capacitor, which is used for soft-switching operation, is also utilized for the improvement of an input current waveform. The low-speed large power devices can construct OSAKA converter. The converter generates the low distorted input current waveforms with high power factor.