This article proposes a common-mode voltage (CMV) attenuation method for the three-phase current source inverter (CSI)-fed permanent-magnet synchronous machine drive. The key of this method is to introduce an auxiliary circuit branch connected in parallel with the dc link. Based on the dedicated switching strategy, the zero-voltage-switching conditions are provided for the main switches in the CSI. In particular, the zero current vector is newly constructed without utilizing shoot-through operation in the CSI. Thus, the CMV in the traditional CSI drives is attenuated significantly. Compared with the existing research on CMV suppression, the proposed method will not compromise the modulation index range or increase output current harmonics. Meanwhile, the overshoot voltage can be clamped by the auxiliary power circuit in the dc link under open-circuit fault in the power switches. The system configuration, operating principle, analysis of operation modes, as well as the control scheme are described in detail. Both simulation and experimental results are presented to verify the performance of the proposed method.

中文翻译：

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具有降低共模电压的软开关电流源逆变器馈电电机驱动器


本文提出了一种用于三相电流源逆变器 (CSI) 馈电永磁同步电机驱动器的共模电压 (CMV) 衰减方法。该方法的关键是引入与直流环节并联的辅助电路支路。基于专用开关策略，为CSI中的主开关提供了零电压开关条件。特别地，在没有利用CSI中的直通操作的情况下新构造零电流矢量。因此，传统CSI驱动器中的CMV被显着衰减。与现有的CMV抑制研究相比，该方法不会影响调制指数范围或增加输出电流谐波。同时，在功率开关发生开路故障时，直流环节的辅助功率电路可以钳位过冲电压。详细介绍了系统的构成、工作原理、工作模式分析以及控制方案。给出了仿真和实验结果来验证所提出方法的性能。