Application of cascaded H-bridge multilevel inverter in the speed regulation of medium- and high-voltage asynchronous motor

Weiliang Wu; Xiping Liu; Jianwei Liang; Zhangqi Liu; Chaozhi Huang

Application of cascaded H-bridge multilevel inverter in the speed regulation of medium- and high-voltage asynchronous motor

Vol. 24, No. 3, pp. 391-413, Mar. 2024

10.1007/s43236-023-00759-0

Cascaded H-bridge

Multilevel inverter

Carrier phase-shifted

Hybrid flux observer

Speed Sensorless

Abstract

Medium- and high-voltage motors are characterized by high power and large inertia, and are widely used in industrial frequency conversion. The cascaded H-bridge multilevel (CHB-ML) inverter adopts a modular design concept to realize high-voltage and high-power functions by cascading multiple identical low-voltage conversion units. Moreover, the harmonic content of the output current of the inverter is small. For this purpose, a multilevel inverter consisting of eight H-bridge inverter units cascaded in each phase is introduced to drive medium- and high-voltage asynchronous motors for starting and frequency regulation. The carrier phase-shifted sinusoidal pulse-width modulation technique, DC voltage equalization control of power unit, and speed sensorless vector control strategy based on a voltage–current hybrid chain observer are mainly introduced. The simulation and experimental results of the real-time digital simulation system (RTDS) of the asynchronous motor dragged by the inverter verify that the CHB-ML inverter with the proposed control strategy has good starting and frequency regulation performance. These findings provide a technical guarantee for the field of medium- and high-voltage high-power drives.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

W. Wu, X. Liu, J. Liang, Z. Liu, C. Huang, "Application of cascaded H-bridge multilevel inverter in the speed regulation of medium- and high-voltage asynchronous motor," Journal of Power Electronics, vol. 24, no. 3, pp. 391-413, 2024. DOI: 10.1007/s43236-023-00759-0.

[ACM Style]

Weiliang Wu, Xiping Liu, Jianwei Liang, Zhangqi Liu, and Chaozhi Huang. 2024. Application of cascaded H-bridge multilevel inverter in the speed regulation of medium- and high-voltage asynchronous motor. Journal of Power Electronics, 24, 3, (2024), 391-413. DOI: 10.1007/s43236-023-00759-0.