Operation analysis of quasi-resonant high-frequency transformer link DC-AC converter applied for phase-shift PWM control in secondary side

摘要

In recent years, the soft-switching techniques have attracted attention for its peculiar advantages such as low swtching loss, high-power density, EMI/RFI noise reduction and so on. Authors have already reported before about quasi- resonant DC-DC converter using new phase-shift PWM control scheme. By using proposed control scheme, circulating current is elimineted and ZVS(Zero Voltage Switching) is achieved with small commutating current. As a result, the con- duction losses caused by their currents are substantially reduced.