一种PWM变频器共模电压抑制技术的研究  

Research on Common-mode Voltage Suppression Technology of PWM Inverter

作　　者：刘刚[1] 刘海舰[1] 孙健[1] 许恩泽[1] LIU Gang;LIU Hai-jian;SUN Jian;XU En-ze(Xuji Group Corporation,XJ Electric Co.,Ltd.,Xuchang 461000,China)

机构地区：[1]许继集团有限公司,许继电气股份有限公司,河南许昌461000

出　　处：《电力电子技术》2020年第5期118-121,共4页Power Electronics

摘　　要：首先分析了脉宽调制(PWM)变频器的共模电压的产生机理和危害,推导出PWM变频器的共模电压计算公式,然后介绍了电机端口共模电压的不同抑制策略的优缺点,再从空间矢量脉宽调制(SVPWM)算法层面研究共模电压的产生根源,根据其原理设计了一种协同控制策略,从算法层面降低共模电压,最后通过仿真和实验验证了协同控制策略的有效性。The mechanism and harm of common-mode voltage in pulse width modulation(PWM)inverter are analyzed firstly,the formula of common-mode voltage of the PWM inverter are calculation,and then the advantages and disadvantages of different common-mode voltage suppression strategies of motor port are introduced,the origin of commonmode voltage from the space vector pulse width modulation(SVPWM)algorithm are studied,the cooperative control algorithms is designed according to its principle,the common-voltage is reduced at the algorithm level.Finally,the effectiveness of the cooperative control algorithms is verified by the simulation and experiment.

关 键 词：变频器 共模电压 协同控制 

分 类 号：TN77[电子电信—电路与系统]