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    【24h】Medium-Voltage Vector Control Induction Motor Drive at Zero Frequency Using Modular Multilevel Converter

    机译使用模块化多电平转换器的零频率中压矢量控制感应电动机驱动器

    【摘要】Conventional modular multilevel converter (MMC) has severe limitation to operate at low frequency for the application of variable-speed induction motor drive. Fluctuation of submodule (SM) capacitor voltage increases rapidly as the motor speed decreases with rated torque. Finally, it becomes impractical to operate the motor at zero frequency. Recently, MMC-based medium voltage induction motor drive has been proposed to tackle this problem without additional circulating current. However, it does not solve the problem near zero frequency with nonzero motor torque. This paper proposes new method to solve this problem of high peak-to-peak voltage ripple of SM capacitor at all frequencies including zero frequency. Vector control strategy for induction motor is adopted here to have accurate control of torque near zero frequency. First, the problem of low-frequency operation is analyzed. Then, the solution is proposed analytically. The proposed control technique and overall performance of the drive have been verified through experimental results.

    【摘要机译】对于变速感应电动机驱动的应用,常规的模块化多电平转换器(MMC)在低频下运行有严格的限制。随着电动机转速随额定转矩降低,子模块(SM)电容器电压的波动迅速增加。最后,以零频率运行电动机变得不切实际。近来,已经提出了基于MMC的中压感应电动机驱动器来解决该问题而无需额外的循环电流。但是,它不能解决非零电机转矩下零频率附近的问题。本文提出了一种新的方法来解决SM电容器在包括零频率在内的所有频率下存在较高的峰峰值电压纹波问题。在此采用感应电动机的矢量控制策略来对零频率附近的转矩进行精确控制。首先,分析低频操作的问题。然后,提出了解决方案。通过实验结果验证了所提出的控制技术和驱动器的整体性能。

    【作者】Yerraguntla Shasi Kumar;Gautam Poddar;

    【作者单位】;

    【年(卷),期】2018(65),1

    【年度】2018

    【页码】125-132

    【总页数】8

    【原文格式】PDF

    【正文语种】eng

    【中图分类】;

    【关键词】Capacitors;Torque;DC motors;Machine vector control;Induction motor drives;Frequency control;

    机译 电容器;转矩;直流电动机;机械矢量控制;感应电动机驱动;频率控制;
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