一类三电平伪图腾柱无桥PFC变换器  

A Family of Three-level Pseudo Totem-pole Power Factor Correction Circuit

作　　者：马辉[1] 徐甜川 范李平 卢云 陈曦 黄悦华[1] MA Hui;XU Tianchuan;FAN Liping;LU Yun;CHEN Xi;HUANG Yuehua(College of Electrical Engineering&New Energy,China Three Gorges University,Yichang 443002,Hubei Province,China;State Gird Hubei Yichang Power Supply Co.,Ltd.,Yichang 443000,Hubei Province,China)

机构地区：[1]三峡大学电气与新能源学院,湖北省宜昌市443002 [2]国网湖北省电力有限公司宜昌供电公司,湖北省宜昌市443000

出　　处：《中国电机工程学报》2024年第2期691-703,I0022,共14页Proceedings of the CSEE

基　　金：国家自然科学基金项目(52377191)。

摘　　要：针对传统二极管钳位型三电平整流器在单相电源前级功率校正(power factor correction,PFC)电路应用场景下全控开关器件数量多的问题,该文基于3种传统无桥PFC电路进行三电平电路拓扑设计,提出一类三电平伪图腾柱PFC电路(single-phase three-level pseudo totem-pole PFC circuit,STPT-PFC),该类三电平PFC具有双电感支路桥臂,两者相互配合工作为输入电流提供路径,在正负半周两电感支路桥臂工作于不同模态可有效降低分别流过两电感的电流;基于该类PFC的一个代表性电路,从工作电流路径过程、关键波形和调制脉冲分配等方面对其进行工作原理分析,并对其它电路进行电路特性总结,推导桥臂对地电压电平特性与开关脉冲分配的数学关系式。另外,该类STPT-PFC共有5种结构,结合该类STPT-PFC结构特点,提出统一区间判断条件的双层载波调制技术,该类STPT-PFC具有相同开关器件不同拓扑结构可采用同一调制方案的特点,便于该类调制技术移植。最后,基于STPT-PFC-I电路设计1台额定功率1 kW、直流输出电压400 V的实验样机,从稳态及动态两方面进行实验分析,实验结果验证所提出一类三电平伪图腾柱PFC电路的可行性和三电平统一双层调制方法的有效性。The traditional three-level diode-clamp converter,when it’s used as a power correction circuit,has a problem of more active switches.To solve this problem,this paper proposed a family of single-phase three-level pseudo totem-pole PFC(STPT-PFC),the kind of circuits reduce the active switches,and this kind of three-level STPT-PFC has two bridge arms with inductors,which has 5 topologies and work in two modes in positive and negative half cycle,the two bridge rams provide a path for the input current and reduce the current value flowing through the single inductor effectively.Then,this paper analyzes and summarizes the working principle of the STPT-PFC from the aspects of specific current path process,key waveform and modulation pulse distribution.In addition,the designed process and simulation results of the unified pulse width modulation are presented.At the same time,the STPT-PFC can adopt the same modulation scheme when the active switches are the same.So,the modulation method is easily used in the other PFC circuit.Finally,the experimental prototype of the STPT-PFC-I circuit is designed and the parameters of this circuit is rated output power 1kW and output voltage 400V.The experimental results verify the correctness of the theoretical analysis and the validity of the unified three-level modulation of the proposed three-level pseudo totem-pole rectifier.

关 键 词：三电平变换器 无桥功率校正电路 三电平双层载波调制技术 

分 类 号：TM46[电气工程—电器]