The traditional ZVS flyback switching power supply can further reduce switching losses compared to quasi-resonant power supplies,but complex circuits and components costs increasing are its disadvantages.The control strategy proposed in this paper to achieve ZVS based on the synchronous rectification controller,which can achieve zero voltage turn-on without relying on additional auxiliary switcher and auxiliary winding.So it has good application prospects.After the introduction of its working principle and simulation results,then making a analysis about the working process at each stage.Finally,the actual system model test proved this method can significantly reduce the loss of the switching components,achieve higher convertor efficiency,and possess cost advantages.
关键词
零电压开关/反激电源/同步整流/有源钳位
Key words
ZVS/flyback switching power supply/synchronous rectification/active clamping
维普
万方数据