Three‐level diode‐clamped (DC) multilevel inverters (MLIs) and its pulse width modulations (PWMs) are studied widely due to its extensive rewards in industrial drives. These modulation schemes are mainly concentrated to mitigate the zero common‐mode (CM) voltage (CMV) and CM current (CMC). Unfortunately, although achieving near‐zero CMV, these conventional methods are inadequate to maintain the DC‐link low‐frequency neutral point voltage oscillations. Hence, bulky DC‐link capacitors are used in DC‐MLIs. In this article, a full CM voltage eliminated the modified space vector modulation (SVM) method by combining the three medium switching vectors (M³V) with one zero vector and two medium switching vectors (M²ZV) is proposed. The hybridization of M³V + M²ZV uses the simple digital circuit to combine M³V and M²ZV, which creates near‐zero CMV and CMC with an improved DC‐link capacitor voltage balancing. The studies on the creation and effects of CMV and CMC are presented in detailed. Compared with the early reported full CMV elimination research works, the proposed method maintains the DC‐link capacitors voltage balancing without compromising the complete elimination of the CMV. Depending on the reference vector modulation indices and DC‐link capacitor voltages, the proposed method uses the mixture of both the M³V and M²ZV switching states. The nominated switching vectors keep the CMV and CMC near to zero with capacitor voltage fluctuation with 1.8%. The mathematical analysis of CMV and CMC, operating principles of M³V and M²ZV, and comparison of the proposed method with other reported methods are presented. The proposed hybrid SVM is compared with the other conventional SVM and multicarrier PWM control by MATLAB/Simulink simulations. Finally, laboratory‐scale experimentations were developed with the support of Spartan‐6 FPGA to test the conventional and proposed SVM method. The validated results confirmed the effectiveness of the proposed hybridization of M³V + M²ZV to maintain the zero CMV and DC‐link balancing together.

中文翻译：

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一种混合空间矢量调制，用于在二极管钳位的多电平逆变器供电的感应电动机驱动器中降低接近零的共模电压和共模电流

由于三电平二极管钳位（DC）多电平逆变器（MLI）及其脉冲宽度调制（PWM），在工业驱动中获得了广泛的回报，因此对其进行了广泛的研究。这些调制方案主要集中在减轻零共模（CM）电压（CMV）和CM电流（CMC）。不幸的是，尽管这些常规方法虽然实现了接近零的CMV，但仍不足以维持DC链路低频中性点电压振荡。因此，DC-MLI中使用了笨重的DC-link电容器。在本文中，提出了一种完整的CM电压，该方法通过将三个介质开关矢量（M ³ V）与一个零矢量和两个介质开关矢量（M ² ZV）结合起来，消除了改进的空间矢量调制（SVM）方法。M ³ V + M的杂交² ZV使用简单的数字电路将M ³ V和M ² ZV组合在一起，从而创建了接近零的CMV和CMC，并具有改进的直流链路电容器电压平衡。详细介绍了CMV和CMC的创建和作用的研究。与早期报道的完全消除CMV的研究工作相比，该方法可以在不损害CMV完全消除的情况下保持直流链路电容器的电压平衡。根据参考矢量调制指数和直流链路电容器电压，建议的方法使用M ³ V和M ^2的混合ZV开关状态。提名的开关矢量使CMV和CMC接近零，电容器电压波动为1.8％。介绍了CMV和CMC的数学分析，M ³ V和M ² ZV的工作原理，以及所提出的方法与其他已报道方法的比较。通过MATLAB / Simulink仿真，将提出的混合SVM与其他传统SVM和多载波PWM控制进行了比较。最后，在Spartan-6 FPGA的支持下开发了实验室规模的实验，以测试常规和建议的SVM方法。验证的结果证实了建议的M ³ V + M ² ZV杂交的有效性，以保持零CMV和DC-link平衡在一起。