基于MATLAB单相不可控整流的PFC仿真与设计  

Simulation and Design of PFC Based on MATLAB for Single Phase Uncontrollable Rectification

作　　者：刘永强 王丽[1] 张清扬 姜泓旭 Liu Yongqiang;Wang Li;Zhang Qingyang;Jiang Hongxu

机构地区：[1]黑龙江科技大学,黑龙江哈尔滨150022

出　　处：《电动工具》2023年第4期14-18,共5页Electric Tool

摘　　要：常规AC-DC变换器、开关电源一般为全桥二极管整流,输出端直连大容量滤波器,难以实现高功率密度的直流转换。尽管不可控整流电路简单可靠,但是其产生的高峰值电流导致输入端电流波形失真,使得交流电网一侧的功率因子降低至0.5~0.65,且无功损耗过大,需要引入功率因数校正(Power Factor Correction)。介绍功率因数校正的由来和原理,以及平均电流控制型PFC Boost变换器结构,分析工作原理。对PFC Boost变换器进行了参数设计。基于MATLAB/Simulink对平均电流控制型PFCBoost变换器进行了仿真。仿真结果表明,PFCBoost变换器的仿真结果满足系统设计要求,输出电压和纹波在设定值范围,输入电压电流同相位实现了单位功率因数控制。Conventional AC-DC converters and switching power supplies generally use full bridge diode rectification,with the output end directly connected to a large capacity filter,making it difficult to achieve high power density DC conversion.Although the uncontrollable rectifier circuit is simple and reliable,the peak current generated by it can cause distortion in the input current waveform,reducing the power factor on one side of the AC power grid to 0.5~0.65,and causing excessive reactive power loss,requiring the introduction of Power Factor Correction.The origin and principle of power factor correction are introduced,as well as the structure of average current controlled PFC Boost converter,and the working principle is analyzed.The parameter design of the PFC Boost converter has been carried out.The average current controlled PFC Boost converter is simulated based on MATLAB/Simulink.It shows that the simulation results of the PFC Boost converter meet the system design requirements,with the output voltage and ripple within the set value range and the input voltage and current in phase,which achieve unit power factor control.

关 键 词：开关电源 BOOST变换器 平均电流控制 功率因数校正 仿真设计 

分 类 号：TP334.1[自动化与计算机技术—计算机系统结构]