A Novel Forward DC/DC Converter with ZCZVT

A novel zero-current-zero-voltage transition(ZCZVT) forward converter is presented in this paper.The proposed converter is operating at 300 kHz and processes the features of both zero-voltage transition(ZVT) at turn on and zero-current transition(ZCT) at turn off for the main switch.The auxiliary switch also achieves zero-current switching(ZCS).The flux of transformer can be reset without tertiary winding.The steady-state analysis and design considerations are investigated in detail in this work.For 48 V input and 12 V 100 W output,a prototype of the proposed converter for 300 kHz switching is built to verify the theoretical analysis of soft switching.