CAJ | 학술논문

针对移相全桥软开关变换器存在的滞后臂难以实现零电压开关(ZVS)和占空比丢失的问题,提出了一种新型的全桥移相零电压变换器拓扑,采用3个等效的高频变压器替代传统的高频变压器,将阻断电容分成2个等效电容串联在桥臂中点之间,增加1个辅助电感实现滞后臂的ZVS.论述了所提出变换器的电路结构、工作原理和关键参数的设计.根据新的拓扑,设计了一台9 kW的实验样机,实验结果证明了该电路拓扑能在宽的负载或输出范围内实现软开关.
침대이상전교연개관변환기존재적체후비난이실현령전압개관(ZVS)화점공비주실적문제,제출료일충신형적전교이상령전압변환기탁복,채용3개등효적고빈변압기체대전통적고빈변압기,장조단전용분성2개등효전용천련재교비중점지간,증가1개보조전감실현체후비적ZVS.논술료소제출변환기적전로결구、공작원리화관건삼수적설계.근거신적탁복,설계료일태9 kW적실험양궤,실험결과증명료해전로탁복능재관적부재혹수출범위내실현연개관.
Aiming at the difficulty of ZVS(Zero Voltage Switching)for the lagging leg of phase-shifted full bridge software converter and the duty cycle lost,a novel topology of full-bridge phase-shifted zero-voltage converter is proposed,which adopts three equivalent transformers instead of the conventional high frequency transformer,divides the blocking capacitor into two equivalent capacitors in series between the midpoints of bridge legs,and adds an auxiliary inductor to realize the ZVS of lagging leg.The structure,operating principle and key parameter design of converter are explained.A 9 kW prototype is designed and the experimental results show that,the soft-switching is realized in a wider range of output or load.