九开关逆变器多电机系统共模电压抑制  

Common Mode Voltage Suppression in a Multi-motor System with a Nine-switch Inverter

作　　者：邓惟滔 李明诚 贺靖 闫保双 DENG Weitao;LI Mingcheng;HE Jing;YAN Baoshuang(School of Information Science and Engineering,Hunan Institute of Science and Technology,Yueyang 414006,China)

机构地区：[1]湖南理工学院信息科学与工程学院,湖南岳阳414006

出　　处：《湖南理工学院学报（自然科学版）》2024年第3期39-43,共5页Journal of Hunan Institute of Science and Technology(Natural Sciences)

基　　金：湖南省自然科学基金面上项目(2024JJ5172);湖南省教育厅科研项目(22C0357);湖南省大学生创新创业训练计划项目(S202210543045)。

摘　　要：具有两个输出端口的九开关逆变器(NSI)在多电机控制领域具有减少开关器件、降低系统成本的优势.针对传统的九开关逆变器虽然能够独立控制两台电机,但其共模电压较高的问题,分析九开关逆变器不同开关状态对共模电压幅值的影响,提出利用两电平九开关逆变器的12个非零矢量对作为模型预测控制新的控制集,可将共模电压幅值限制在±Udc/6范围内.最后进行了仿真实验,验证了该方法的有效性.A nine-switch inverter(NSI)with two output ports has the advantages in terms of reducing the number of switching devices and lowering system costs in the multi-motor control domain.By controlling the upper and lower motors separately based on the effective states of the nine switches,the NSI generates a higher common-mode voltage.This article analyzes the impact of various switch states of a NSI on the amplitude of the common-mode voltage.It proposes utilizing the 12 non-zero vectors of a two-level NSI as a novel control set for model predictive control.The suggested approach restricts the amplitude of the common-mode voltage to within±Udc/6,and its effectiveness is validated through simulation.

关 键 词：九开关逆变器 共模电压 多电机控制 模型预测控制 

分 类 号：TM34[电气工程—电机] TM46