可实现辅助开关管准零电流开关的半无桥功率因数校正变换器  

Semi Bridgeless Boost PFC Converter With Quasi-zero-current Switching Auxiliary Switch

作　　者：胡玮[1] 康勇[1] 胡昊 周小宁 

机构地区：[1]强电磁工程与新技术国家重点实验室(华中科技大学电气与电子工程学院),湖北省武汉市430074 [2]中国电信股份有限公司武汉分公司,湖北省武汉市430080 [3]武汉全华光电科技有限公司,湖北省武汉市430070

出　　处：《中国电机工程学报》2017年第21期6390-6399,共10页Proceedings of the CSEE

摘　　要：提出一种可实现辅助开关管准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。通过增加一个有源辅助谐振支路,变换器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。与此同时,它还进一步减小了辅助开关管的开关损耗,而各连通二极管也均实现了自然开关。理论分析变换器的工作模态,详细讨论变换器软开关实现条件和控制策略,在此基础上给出有源辅助谐振支路参数设计。设计一台开关频率100kHz、额定输出400V/600W的原理样机,验证了变换器设计方案的可行性和理论分析的正确性。An implementation of zero-voltage transition （ZVT） semi bridgeless boost power factor correction （PFC） converter with quasi-zero-current switching （ZCS） auxiliary switch was proposed. By using an active snubber circuit, 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. At the same time, it also further reduces the power loss of the auxiliary switch, and realizes switching naturally for the rest of the diodes. The operating modes of the converter were analyzed theoretically, the constraints under soft switching and control strategy design for the converter were discussed in detail. On the basis of it, the parameters of the active snubber were given. A prototype of proposed circuit operating at 100kHz switching frequency, 400V/600W rated output had been built to verify the feasibility of the design scheme and the correctness of theoretical analysis.

关 键 词：半无桥Boost PFC变换器 零电压转换 零电流开关 激磁电感 寄生振荡 

分 类 号：TM46[电气工程—电器]