Quasi-Square-Wave PWM Modulation for Modular Multilevel Converter in Variable Speed Motor Drives With Inductor Energy Recovery

被引：0
作者：
Xia, Peizhou [1 ]
Zhang, Xinyun [1 ]
Judge, Paul D. [1 ]
Merlin, Michael Marc Claude [1 ]
Finney, Stephen [1 ]
机构：
[1] Univ Edinburgh, Inst Energy Syst, Sch Engn, Edinburgh EH8 9YL, Scotland
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2025年 / 40卷 / 09期
基金：
英国工程与自然科学研究理事会;
关键词：
Switches; Capacitors; Pulse width modulation; Voltage control; Motor drives; Topology; Control systems; Frequency modulation; Complexity theory; Capacitance; Capacitor voltage ripple; modular multilevel converter (MMC); pulse width modulation (PWM); variable-speed drives; ARCHITECTURES;
D O I：
10.1109/TPEL.2025.3565836
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The Quasi-Square-Wave (QSW) PWM-modulated Modular Multilevel Converter (MMC) offers the advantages of reduced submodule capacitance and arm inductance, making it a promising technology for variable-speed motor drive applications. This article presents an analytical investigation into the sizing requirements for arm inductors and submodule capacitors in the QSW-PWM-modulated MMC. In addition, an alternative switching sequence is proposed to recover arm inductor energy, effectively eliminating oscillations and ripple current while further reducing voltage variation. The proposed control strategy simplifies hardware requirements by limiting control to steady-state voltage regulation, reducing reliance on high-frequency current control. Simulations and experiments conducted on a scaled test rig validate the proposed switching sequence, and verify the reduced capacitor voltage variation achieved through the proposed control strategy.
引用
收藏
页码：12321 / 12336
页数：16
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