基于DSP双向开关型无桥PFC变换器的研究  

Research of the Bidirectional Switch PFC Converter based on DSP

作　　者：林朝明[1] 

机构地区：[1]福建水利电力职业技术学院

出　　处：《电气技术》2015年第7期68-71,共4页Electrical Engineering

摘　　要：对一种新颖前沿的单相双向开关型AC/DC无桥PFC拓扑进行研究,采用数字化前馈补偿,改善传统双环输入电流畸变问题,通过引入该种MCM数字前馈占空比补偿,使得系统在负载全功率范围内,输入电流波形不受电感连断续下模型差异的影响,都能得到一个较好的PFC效果。对于外环电压带宽低,采用输出负载电流前馈,改善其动态性能。最后搭建1k W的无桥PFC样机,并在该平台上验证了该套方案的可行性。The paper presents a front-end topology of a bidirectional switch power factor（Bridgeless-PFC）, and digitized feedfoward compensation method is adopted to improve the quality of the input current under the traditional method of double control loop（PI）. The system can reduce the impact of the switch between DCM and CCM, and attain a good result during the full power range. The theoretical analysis of the proposed method is deduced, and the experiment results are attained by using digitally controlled Bridgeless-PFC, which validate the proposed compensation method.

关 键 词：双向开关 无桥PFC MCM前馈补偿 输入电流畸变 全功率范围 

分 类 号：TM46[电气工程—电器]