Phase-shift controlled zero current switching high frequency inverter in the MHz frequency range

This paper deals with the novel soft-switching inverter topology and its capability of high frequency switching technology to be applicable to the power conversion system. To realize the switching power supply in the MHz switching application, there are some problems to be solved. Especially, the switching loss and EMI (Electro Magnetic Interference) noise increase by the MHz switching operation is significant. In order to overcome these problems, we propose the phase-shift controlled ZCS (zero current switching) inverter in this paper. This circuit has soft-switching capability in the MHz switching range by the ZCS circuit topology and can control the output power by the phase-shift controlled method. In addition, effectiveness of this circuit is confirmed by simulation and experimental result.