具有宽负载范围的新型Boost功率因数校正器  

A Novel Boost PFC Converter with Wide Load Range

作　　者：于海坤[1] 许建平[1] 张斐[1] 王金平[1] 

机构地区：[1]西南交通大学电气工程学院成都610031

出　　处：《电工技术学报》2011年第12期93-98,共6页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(50677056)

摘　　要：针对不连续导电模式(DCM)和连续导电模式(CCM)Boost PFC变换器存在负载范围受限的问题,提出了一种工作在伪连续导电模式(PCCM)的新型Boost功率因数校正变换器。分析了PCCM Boost变换器的工作过程,建立了PCCM Boost PFC变换器的大信号模型,在此基础上设计了数字谷值电流控制策略和电压环PI调节器。该变换器可在较宽的负载范围内实现高功率因数。通过一台输出功率范围为70～400W的实验样机,对PCCM Boost PFC变换器和CCM Boost PFC变换器的性能进行了对比和验证。To extend the load variation range of Boost PFC converter operating in DCM and CCM, a novel PFC converter operating in pseudo continuous conduction mode （PCCM） is proposed. The operation of PCCM Boost converter is analyzed and its large signal model is established. Based on which, the digital valley current control strategy of current loop and PI compensation of voltage loop is designed. The PCCM Boost PFC converter can achieve high power factor over a wide load variation range. The performance of PCCM Boost PFC converter and CCM Boost PFC converter is verified and compared by using a 70-400W experimental prototype.

关 键 词：BOOST变换器 伪连续导电模式 负载范围 功率因数 

分 类 号：TM461[电气工程—电器]