【摘要】 提出了一种新型两相并联Boost变换器软开关实现策略。该方案无需借助任何辅助电路,仅利用耦合电感漏感与开关管寄生电容之间的谐振,配合时序微调,即可实现主开关管零电压开关(ZVS)开通,提升变换效率。分析了所提电路拓扑结构、控制方法及其工作过程,并结合电路特点,提出相应的均流控制方案。在理论分析的基础上,通过原理样机(12 V输入,36 V/1.4 A输出)获得的实验结果验证了理论分析的正确性。更多还原

【Abstract】 A new soft switching strategy for a two-phase parallel Boost converter is proposed.By only taking advantage of the resonance between the leakage inductor of the coupled inductor and the parasitic capacitors of the switches, the zero-voltage-switching(ZVS) turning-on of the power switches is achieved by using a control of time sequence without adding auxiliary circuits,so the conversion efficiency can be improved.The topology,control scheme and operating principle are analyzed and a corresponding current sharing scheme is introduced according to its specification. Based on the theoretical analysis,the experimental results of a prototype(12 V input,36 V/1.4 A output) verify the correctness of the proposed strategy.更多还原