In this paper, space vector modulation (SVM) techniques are developed to operate the six-phase current-source inverters (CSI) while reducing the common-mode voltage (CMV) content associated with the switching of semiconductors. The CMV issue is a severe issue of high-power electronics converters that causes damage to electric drives and shortens their life span. Since the null states are the main contributor to CMV in SVM schemes, an optimum offline selection method is proposed in this paper for all the presented techniques. The SVM techniques discussed in this proposal are built on the renowned vector space decomposition (VSD) method. The modulation in all the techniques is based on studying the resultant CMV associated with all the possible switching states and then selecting the states that produce the lowest magnitude of CMV. Accordingly, the optimum sequences for the switching patterns are introduced, and the utilization of the dc-link current for each scheme is analyzed. A quantitative comparison is conducted to evaluate all the proposed schemes in the generated CMV in peak and RMS values versus the modulation index and load power factor range. A laboratory prototype is presented, and the experimental results to validate the proposals are illustrated with a detailed discussion.

中文翻译：

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降低六相级联CSI共模电压的离线SVM技术

在本文中，开发了空间矢量调制 (SVM) 技术来操作六相电流源逆变器 (CSI)，同时降低与半导体开关相关的共模电压 (CMV) 含量。CMV 问题是大功率电子转换器的一个严重问题，会导致电力驱动器损坏并缩短其使用寿命。由于空状态是 SVM 方案中 CMV 的主要贡献者，因此本文针对所有提出的技术提出了一种最佳离线选择方法。本提案中讨论的 SVM 技术建立在著名的向量空间分解 (VSD) 方法之上。所有技术中的调制都是基于研究与所有可能的开关状态相关的合成 CMV，然后选择产生最低 CMV 幅度的状态。因此，介绍了切换模式的最佳顺序，并分析了每种方案的直流母线电流利用率。进行定量比较以评估生成的 CMV 中的所有建议方案的峰值和 RMS 值与调制指数和负载功率因数范围的关系。展示了一个实验室原型，并通过详细讨论说明了验证建议的实验结果。