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标题：抑制共模电压的双逆变器SVPWM调制策略 |
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作者：邹存芝， 朱佳梅 |
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| 2017年第6期 访问次数：301次 |
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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。
关键词：开放绕组电机；双逆变器；共模电压；SVPWM
Abstract: Compared with traditional star connected winding motor, openend 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 zerosequence current in the openend winding drive system has to be considered since it causes high capacity and system loss. In order to eliminate the system zerosequence current, a SVPWM modulation using the switch combination without commonmode voltage was investigated in this paper, and the commonmode voltage and zerosequence current can be suppressed. Finally, the method was verified by simulations and experiments.
Key words: openend winding motor; dual twolevel inverter; commonmode voltage; SVPWM
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