母线排寄生参数对三相变换器电磁干扰的影响  

Analysis of electromagnetic interference effects produced by bus-bar parasitic parameters of three-phase PWM converter

作　　者：谢琳琳[1] 梁斌[1] 魏克新[1] 

机构地区：[1]天津理工大学自动化学院天津市复杂工业系统控制理论及应用重点实验室,天津300384

出　　处：《电源技术》2015年第10期2291-2294,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金项目(50977063);国家高技术研究发展计划项目(2008AA11A145);天津市科技支撑重点项目(09ZCKFGX01800)

摘　　要：由于母线排的寄生电感和开关过程中较大瞬态电流的存在,在IGBT上形成过电压,对IGBT的性能造成一定的损害。基于部分元等效电路理论(partial element equivalent circuit,PEEC)对三相PWM变换器母线排进行分析,提取其寄生电感和寄生电阻,并对母线排的结构进行了优化。在saber软件中搭建三相变换器的等效电路来分析母线排寄生电感对系统电磁干扰的影响。仿真结果表明母线排的寄生参数对直流侧差模电磁干扰影响较大,并且优化后的母线排的寄生电感和寄生电阻的值降低了数倍,明显减小了高频段差模电磁干扰。这对于变换器主电路设计和可靠性分析具有一定的意义。Because of the parasitic inductance in the bus bar and large transient currents the switching process, the over-voltage on IGBT was formed and cause some damage to the IGBT performance. Based on the partial element equivalent circuit（PEEC）, the three-phase PWM converter of bus bar row was analyzed, the parasitic inductance and parasitic resistance were extracted, and then bus bar structure was optimized. In the saber software the three-phase equivalent circuit of the converter was built to analyze the impact of the bus bar＇s parasitic inductance to the system electromagnetic interference. The results of simulation show that the bus bar＇s parasitic parameters have a greater impact on the DC side of the differential mode electromagnetic interference, and the parasitic parameters of optimized busbar reduce about one order of magnitude, significantly reducing differential electromagnetic interference at high frequency. It had a certain significance for the design and reliability analysis of the converter main circuit.

关 键 词：变换器 PEEC 寄生参数 电磁干扰 母线排 

分 类 号：TM41[电气工程—电器]