摘要
提出一种采用LCD箝位网络实现辅助开关管零电流关断和自耦变压器激磁能量回馈的设计原理。据此推导出一种可实现辅助开关管零电流开关的零电压转换半无桥功率因数校正变换器拓扑,其辅助开关管开关损耗趋近于零。与此同时,该变换器还实现了主开关管的零电压开关和升压二极管的自然开关,并且没有增加它们的电压应力。自耦变压器绝大部分激磁能量和漏感能量也回馈到负载中。理论分析了该变换器的工作模态,推导出变换器宽电压运行的约束条件及自耦变压器激磁能量回馈的理论值,不同工况条件下的实验验证了该变换器设计方案的可行性和理论分析的正确性。该变换器相较于已有变换器能进一步提升效率。
A design principle is proposed to realize the auxiliary switch under zero-current switching(ZCS) and the magnetizing energy feedback by using LCD clamp circuit. On the basis of it, an implementation of zero-voltage transition(ZVT) semi bridgeless boost power factor correction(PFC) converter with ZCS auxiliary switch is deduced. The power loss of the auxiliary switch is close to zero. At the same time, the proposed converter provides zero-voltage switching(ZVS) for the main switches and switching naturally for the boost diodes without increasing the voltage stress of them, and realizes most of the leakage and magnetizing energy feedback to the load. The operating modes of the converter are analyzed theoretically, the constraints under wide line and the theoretical value of magnetizing energy feedback are deduced. The feasibility of the design scheme and the correctness of the theoretical analysis are verified by the experiment at wide line and full load. The converter can further improve efficiency than the existing converters.
作者
胡玮
康勇
胡昊
周小宁
HU Wei;KANG Yong;HU Hao;ZHOU Xiaoning(State Key Laboratory of Advanced Electromagnetic Engineering and Technology(Huazhong University of Science and Technology),Wuhan 430074,Hubei Province,China;China Telecom Co.,Ltd.,Wuhan branch,Wuhan 430080,Hubei Province,China;Wuhan Quanhua Optoelectronics Technology Co.,Ltd.,Wuhan 430070,Hubei Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2019年第3期803-811,959,共10页
Proceedings of the CSEE