摘要
针对硬开关功率因数校正(PFC)变换器开关损耗大、电磁辐射严重的问题,提出一种具有软开关的单级隔离型PFC变换器。该变换器在一次侧功率管导通和关断时段均能向二次侧传递能量,兼具正激和反激变换器的特性。通过利用隔离变压器的漏感与电容形成谐振使得输出二极管零电流关断(ZCS),同时一次侧主开关管和有源钳位开关管均以零电压开通(ZVS),所有功率开关管均工作在软开关状态,变换器的开关损耗降低。详细分析变换器的工作原理、运行特性以及参数设计,并搭建实验样机,验证了理论分析的正确性和有效性。
Since hard switching PFC converters have large switching losses and serious electromagnetic radiation,a novel single-stage isolated soft-switch PFC topology is presented.It has the features of both forward and flyback converters that can deliver energy during the turn-on and turn-off periods of the primary main switch.The diodes in the secondary side can be turned off with zero current switching(ZCS)conditions by forming resonant cavity on the secondary side of the transformer,and the zero voltage switching(ZVS)conditions can be achieved for the main power switch and the active-clamped one.Therefore,all the power conductors have soft-switching performance and the switching loss of the converter is low.The operation principles,characteristics and parameter design of the proposed converter are analyzed in detail.Experimental results of the established prototype are presented to verify the effectiveness and accuracy of theoretical analysis.
作者
章治国
刘俊良
郭强
陈艳
Zhang Zhiguo;Liu Junliang;Guo Qiang;Chen Yan(Energy Internet Engineering Research Center of Chongqing City Chongqing University of Technology Chongqing 400054 China;College of Automation Chongqing University of Posts and Telecommunications Chongqing 400065 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2018年第14期3222-3230,共9页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51607020)
重庆市教委科学技术研究项目(KJ1709209)资助
关键词
功率因数校正
谐振
零电流关断
零电压开通
软开关
Power factor correction(PFC)
resonance
zero current switching(ZCS)
zero voltage switching(ZVS)
soft-switching
