Soft-Switching Strategy by TraNsfer Frequency Control of Wireless Power Transfer System Using a Matrix Converter in Regeneration Mode

These days, the world is right in the middle of EV shift. Introducing regenerative technology in EV charging facilities becomes possible to exchange power between EVs and power systems (V2G/G2V). This paper focuses on regeneration mode, from EV's DC battery to three-phase AC power supply, in wireless power transfer system using a matrix converter. Wireless charging for EVs uses high frequency, resulting in high switching losses. Therefore, in the proposed system in regeneration mode, the soft-switching strategy by controlling transfer frequency and the duty cycles of the matrix converter are proposed in this paper. The effectiveness of the theory is verified by an experiment.