抑制共模电压的双逆变器SVPWM调制策略  

Common-mode Voltage Suppressed SVPWM Strategy for Dual Two-level Inverters

作　　者：邹存芝[1] 朱佳梅[1] ZOU Cunzhi ZHU Jiamei(Institute of Information Engineering, Harbin Institute of Petroleum , Harbin 150028, China)

机构地区：[1]哈尔滨石油学院信息工程学院,哈尔滨150028

出　　处：《微电机》2017年第6期69-73,共5页Micromotors

基　　金：黑龙江省教育厅科学技术研究项目(12543039)

摘　　要：与传统星接绕组电机驱动系统相比,采用双逆变器供电的开放绕组电机驱动系统具有高母线电压利用率、更好的容错能力等优点,在电动汽车、电力牵引等领域具有良好的应用前景。但由于三相绕组中性点被拆开,导致系统中存在潜在的零序电流问题,零序电流会增加逆变器容量和系统损耗,甚至使系统无法运行。为消除系统零序电流,本文提出采用不产生共模电压的开关组合进行SVPWM调制,从而抑制系统的共模电压以及由此引起的零序电流。最后通过仿真和实验验证了这种方法的可行性。Compared with traditional star connected winding motor, open-end winding motor fed by the duel inverter has the advantages of high voltage rate, better fault tolerance, and so on, and therefore it has a good application prospect in the field of electrical vehicle, electrical traction. But since the neutral point of three winding is apart, the potential zero-sequence current in the open-end winding drive system has to be consid- ered since it causes high capacity and system loss. In order to eliminate the system zero-sequence current, a SVPWM modulation using the switch combination without common-mode voltage was investigated in this paper, and the common-mode voltage and zero-sequence current can be suppressed. Finally, the method was verified by simulations and exDeriments.

关 键 词：开放绕组电机 双逆变器 共模电压 SVPWM 

分 类 号：TM464[电气工程—电器]