一种带辅助电路的ZCS软开关全桥直流变换器  

A ZCS soft-switching full-bridge DC-DC converter with auxiliary circuits

作　　者：邵珠雷[1] 

机构地区：[1]许昌学院电气工程学院,河南许昌461000

出　　处：《电子技术应用》2016年第2期118-121,共4页Application of Electronic Technique

基　　金：河南省高等学校重点科研项目(15B470006)

摘　　要：针对零电压零电流开关(ZVZCS)全桥直流变换器在中大功率应用场合效率不高的问题,提出了一种带辅助电路的零电流开关(ZCS)全桥直流变换器。通过为全桥直流变换器的超前臂和滞后臂设计相应的辅助电路,实现了全桥直流变换器两桥臂开关管的零电流关断,即实现了ZCS。根据提出的ZCS软开关全桥直流变换器结构,试制了一台3 k W的样机。实验结果表明,ZCS软开关全桥直流变换器的超桥臂及滞后臂均工作于零电流开关状态。为验证ZCS软开关全桥直流变换器的效率性能,将其与ZVZCS全桥直流变换器进行效率方面的比较。由比较结果可知,ZCS软开关全桥直流变换器在中大功率应用场合中的效率明显优于ZVZCS全桥直流变换器,表现出良好的性能。Aiming at the problems of zero voltage zero current switching（ ZVZCS） full- bridge DC- DC converter in high power appli-cation, a zero current switching（ ZCS） soft- switching full- bridge DC- DC converter with auxiliary circuits is proposed in this paper.The outstanding feature of the ZCS converter is that it allows its main power switches to operate with zero current switching（ ZCS）by using two simple auxiliary circuits. A 3 k W converter was designed, and the experimental waveforms show that the leading leg and lagging leg of the converter are operated with zero current switching. Finally, a comparative study was done on the ZCS con-verter and the ZVZCS converter. It can be seen that the ZCS converter is more efficient than the ZVZCS converter in high power application.

关 键 词：软开关 全桥直流变换器 零电流开关 

分 类 号：TM46[电气工程—电器]