CAJ | 학술논문

采用谐振极型零电压零电流软开关技术(zero-voltage/ zero-current transition，ZVZCT)旨在消除功率器件的开关损耗，但实际上在软开关谐振换流过程中会引入多次额外的二极管反向恢复过程，产生额外的损耗。由于软开关换流过程中的特殊性，采用一般的方法难以对反向恢复过程中的损耗进行评估和计算，给ZVZCT软开关设计带来了困难。该文在考虑二极管反向恢复过程的基础上，详细介绍了ZVZCT软开关技术的换流过程。通过引入二极管载流子寿命以及电荷控制方程，提出了一种适用于软开关换流条件下的二极管反向恢复损耗模型。最后，通过软开关组件的双脉冲实验验证了该二极管反向恢复损耗模型的正确性。研究表明，采用ZVZCT技术的软开关设备的开关损耗与开关器件的二极管反向恢复特性直接相关。
채용해진겁형령전압령전류연개관기술(zero-voltage/ zero-current transition，ZVZCT)지재소제공솔기건적개관손모，단실제상재연개관해진환류과정중회인입다차액외적이겁관반향회복과정，산생액외적손모。유우연개관환류과정중적특수성，채용일반적방법난이대반향회복과정중적손모진행평고화계산，급ZVZCT연개관설계대래료곤난。해문재고필이겁관반향회복과정적기출상，상세개소료ZVZCT연개관기술적환류과정。통과인입이겁관재류자수명이급전하공제방정，제출료일충괄용우연개관환류조건하적이겁관반향회복손모모형。최후，통과연개관조건적쌍맥충실험험증료해이겁관반향회복손모모형적정학성。연구표명，채용ZVZCT기술적연개관설비적개관손모여개관기건적이겁관반향회복특성직접상관。
Using the zero-voltage/zero-current transition (ZVZCT) soft-switching technology is to reduce the switching losses of the power devices. But in fact, several extra diode reverse recovery in the commutating process of the soft-switching technology will generate additional losses. Due to the particularity of soft-switching technology, the losses of diode reverse recovery are so hard to evaluate and calculate that make it difficult to design the ZVZCT soft-switching devices. This paper gives thorough analysis on the commutating process of ZVZCT soft-switching technology, with the diode reverse recovery being considered, and the mathematic losses model of the diode reverse recovery is also established by using the diode’s life time and charge equations. Finally, the experimental results are provided to verify the proposed losses model and show that the losses of the diode reverse recovery directly affect the efficiency of the ZVZCT soft-switching devices.