A simplified control scheme for zero voltage transition (ZVT) inverter using coupled inductors

A new soft-switching control scheme for zero voltage transition (ZVT) inverter using coupled inductors is proposed in the paper. By applying this new control scheme, the ZVT inverter has several salient features: simple fixed timing control for the auxiliary switches does not require any load information, thus eliminates the needs of current for soft-switching operation; all the main and auxiliary switches are under soft-switching condition; the auxiliary circuit current level is adaptive to the load current, thereby minimizing the conduction loss. The operating principle and design procedures are presented in the paper. Simulation results verify the validity of the proposed scheme.