低共模干扰的双三相永磁同步电机SVPWM控制  

Low Common Mode Interference SVPWM Control for Dual Three Phase Permanent Magnet Synchronous Motor

作　　者：张志锋[1] 吴雪松 刘晓东 Zhang Zhifeng;Wu Xuesong;Liu Xiaodong(School of Electrical Engineering Shenyang University of Technology,Shenyang,110870,China;State Grid Liaoning Electric Power Co.Ltd Huludao Electric Power Supply Company,Huludao,125000,China)

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870 [2]国网辽宁省电力有限公司葫芦岛供电公司,葫芦岛125000

出　　处：《电工技术学报》2018年第A01期58-66,共9页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(61603263);辽宁省教育厅科学研究一般项目(LGD2016030)资助

摘　　要：提出一种空间电压矢量脉宽调制(SVPWM)控制方法以降低双三相永磁同步电机系统的共模干扰。首先分析了电机驱动系统中共模电压产生的原因,然后利用双三相永磁同步电机电压矢量冗余的特点,在每一扇区内选择低共模电压幅值和变化频率的电压矢量组合,从而降低系统的共模干扰。理论分析和实验结果表明,采用该双三相永磁同步电机低共模干扰SVPWM控制方法,共模电压的幅值降低为直流母线电压的1/6,一个周期内共模电压的变化次数降低为2次,从而降低了系统的共模电流,并且当电机运行于中高速情况下,定子电流谐波并没有明显的增加。In order to reduce the common mode interference of dual three-phase permanent magnet synchronous motor(PMSM),a novel space vector pulse width modulation(SVPWM)control strategy is proposed in this paper.Firstly,in the motor driving system,the generation mechanism of the common mode voltage(CMV)is analyzed and discussed.Secondly,based on the voltage vector redundancy of the dual three-phase PMSM,for each sector,the voltage vector combination with lower CMV amplitude and smaller variation frequency is selected,which finally reduces the system common mode interference.Through theoretical analysis and physical experiment,the proposed control strategy can effectively reduce the amplitude of common mode voltage up to 1/6 of the DC bus voltage.Furthermore,the variation frequency of CMV is reduced to 2,so that the system common mode current can be decreased.In addition,from the experiment,it can be seen that there is no obvious increase in the stator current harmonic components when the motor is operating under middle or high-speed condition.

关 键 词：双三相永磁同步电机 共模干扰 谐波 空间电压矢量脉宽调制 

分 类 号：TM351[电气工程—电机]