A Medium-Voltage Motor Drive With a Modular Multilevel PWM Inverter
A Medium-Voltage Motor Drive With a Modular Multilevel PWM Inverter
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DOI：
10.1109/tpel.2010.2042303
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发表时间：
2010-02
影响因子：
6.7
通讯作者：
M. Hagiwara;K. Nishimura;H. Akagi
中科院分区：
文献类型：
--
作者：
M. Hagiwara;K. Nishimura;H. Akagi
本文介绍了一个模块化的多电平PWM逆变器的无变压器中压电机驱动器的控制和操作性能。逆变器的突出之处在于由多个双向斩波单元级联而成的模块化臂结构。具有与电机（逆变器）频率相同频率的主导交流电压波动发生在每个斩波单元的直流电容器两端。电压波动的幅度与电机频率成反比。本文对电压波动进行了理论分析，并对系统进行了设计。设计并建立了一个额定电压为400 V、功率为15 kW的缩小模型，以验证九电平（线对线为17电平）PWM逆变器用于中压电机驱动的有效性。
This paper describes the control and operating performance of a modular multilevel PWM inverter for a transformerless medium-voltage motor drive. The inverter is prominent in the modular arm structure consisting of a cascaded stack of multiple bidirectional chopper-cells. The dominant ac-voltage fluctuation with the same frequency as the motor (inverter) frequency occurs across the dc capacitor of each chopper-cell. The magnitude of the voltage fluctuation is inversely proportional to the motor frequency. This paper achieves theoretical analysis on the voltage fluctuation, leading to system design. A downscaled model rated at 400 V and 15 kW is designed and built up to confirm the validity and effectiveness of the nine-level (17-level in line-to-line) PWM inverter for a medium-voltage motor drive.