CAJ | 학술논문

针对基本ZVS三电平变换器的缺点，论文提出了一种改进型倍流整流式零电压开关三电平变换器。该变换器在基本ZVS三电平变换器拓扑的变压器原边加入了辅助网络，利用辅助谐振网络实现滞后臂的零电压开关，副边采用倍流整流电路。使整流二极管自然换流，解决了变压器副边电压过冲和占空比丢失的问题。与基本ZVS三电平变换器相比．该变换器具有辅助网络简单、实现零电压范围宽、副边无电压过冲和占空比丢失以及控制方式灵活等优点。文中详细分析了变换器的工作原理，并通过一台24V／10A，80kHz的实验样机进行了验证。
침대기본ZVS삼전평변환기적결점，논문제출료일충개진형배류정류식령전압개관삼전평변환기。해변환기재기본ZVS삼전평변환기탁복적변압기원변가입료보조망락，이용보조해진망락실현체후비적령전압개관，부변채용배류정류전로。사정류이겁관자연환류，해결료변압기부변전압과충화점공비주실적문제。여기본ZVS삼전평변환기상비．해변환기구유보조망락간단、실현령전압범위관、부변무전압과충화점공비주실이급공제방식령활등우점。문중상세분석료변환기적공작원리，병통과일태24V／10A，80kHz적실험양궤진행료험증。
Aiming at the drawbacks of the basic ZVS three-level converter, an improved current-double-rectifier ZVS threelevel DC-DC converter is proposed. The topology adds an assistant network to the primary side of the transformer, which could achieve ZVS of the lagging switch. The transformer secondary side of the proposed converter uses the current-double-rectifier circuit, which can resolve the high voltage spike and surge of the transformer secondary side and the duty ratio loss. It has many remarkable advantages such as simple auxiliary circuit, realizing ZVS in the wide load range, no voltage spike and surge of the transformer secondary side and easy to be controlled. The operating principle of the converter is analyzed. A 24V/10A, 80 kHz prototype is tested to validate the feasibility.