一种单级全桥PFC变换器电压尖峰抑制方法  

A method for voltage spike suppression of a single-stage full-bridge PFC converter

作　　者：贲洪奇[1] 丁明远 范会爽 孟涛[2] BEN Hong-qi;DING Ming-yuan;FAN Hui-shuang;MENG Tao(School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001,China;School of Mechanical and Electrical Engineering, Heilongjiang University, Harbin 150080, China)

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,哈尔滨150001 [2]黑龙江大学机电工程学院,哈尔滨150080

出　　处：《电机与控制学报》2019年第10期23-32,共10页Electric Machines and Control

基　　金：国家自然科学基金(51377036)

摘　　要：针对传统单级单相全桥功率因数校正(power factor correction,PFC)变换器在换流过程中存在较高母线电压尖峰的问题,提出一种在其母线上并入改进型RCD(resistance capacitance diode)箝位环节的方法加以抑制。在深入研究箝位环节对母线电压尖峰抑制机理的基础上,对改进型RCD箝位环节的能量传输过程进行分析,得到峰值电压与箝位环节参数之间的定量关系,进而给出箝位环节各参数的设计方法,并对所提出方法进行性能测试,讨论箝位环节各参数对母线电压尖峰抑制效果以及变换器性能的影响规律,实验结果表明所提出方法可在不影响功率因数校正效果的情况下有效控制母线电压峰值,实现电压尖峰的抑制。Aiming at the problem of high bus voltage spike in the traditional single-stage single-phase fullbridge power factor correction (PFC) converter during commutation, a method of incorporating improved RCD (resistance capacitance diode)clamps on its bus is proposed to suppress it. Based on an in-depth study of the clamping mechanism of the bus voltage spike suppression mechanism, the energy transfer process of the modified RCD clamp was analyzed, and the quantitative relationship between the peak voltage and the clamp parameters was obtained, and then the clamp link was given. The design method of each parameter was carried out, and the performance of the proposed method was tested. The influence of the parameters of the clamp on the suppression of the bus voltage spike and the performance of the converter were discussed. The experimental results show that the proposed method can effectively control the bus voltage peak without affecting the power factor correction effect and achieve voltage spike suppression.

关 键 词：单级单相全桥PFC变换器 改进型RCD箝位环节 母线电压尖峰 抑制机理 参数设计方法 

分 类 号：TM461[电气工程—电器]