断续模式单电感双输出Buck功率因数校正变换器  

Single-Inductor Dual Output Buck Power Factor Correction Converter Operating in Discontinuous Conduction Mode

作　　者：刘雪山[1] 许建平[1] 王楠[1] 高建龙[1] 

机构地区：[1]磁浮技术与磁浮列车教育部重点实验室(西南交通大学),成都610031

出　　处：《电工技术学报》2015年第22期62-70,共9页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51177140);中央高校基本科研业务费专项资金(2682013ZT20)资助项目

摘　　要：传统多路输出功率因数校正(PFC)变换器多由前级PFC变换器级联多个DC-DC变换器的两级变换组成,成本高、体积大。提出了一种单级变换的单电感双输出(SIDO)Buck PFC变换器及其控制策略,并分析了其工作特性。通过对电感的分时复用控制,实现了两个输出支路的独立控制。电感电流工作在断续模式(DCM),消除了各路的交叉影响,相对于传统两级变换的多路输出PFC变换器,减少了控制器与电感的数量,降低了变换器的体积与成本,并提高了变换器的效率。实验结果验证了此变换器高效率、高功率因数以及两个输出支路的高输出准确度控制特性。Two stage multiple output power factor correction（PFC） converter has the disadvantages of high cost and large size. In order to solve the above problems, a novel single-inductor dual-output Buck PFC converter was proposed in this paper. Control strategy and corresponding characteristics were analyzed. Independent regulation can be achieved in this converter by multiplexing a single inductor. Inductor current operates in discontinuous conduction mode（DCM）, eliminates the cross- regulation of each output. Compared with conventional two-stage multiple output solution, this solution benefits with significant overall cost saving, small size and light weight of equipment and device. Due to single stage power conversion, this PFC converter also benefits with high efficiency advantage. Finally, the characteristics of efficiency, power factor and output accuracy were verified in experimental results.

关 键 词：BUCK 功率因数校正 单电感双输出 断续模式 单级结构 

分 类 号：TM46[电气工程—电器]