Common-mode Voltage Suppression Method of Twelve-phase Three-level H-bridge Inverter

QIU Chengyi; HU Liangdeng; LIN Mingyao; LU Bin; LONG Qijie

doi:10.13334/j.0258-8013.pcsee.250050

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Common-mode Voltage Suppression Method of Twelve-phase Three-level H-bridge Inverter

更新时间：2026-10-12

- Common-mode Voltage Suppression Method of Twelve-phase Three-level H-bridge Inverter
- Issue 24, Pages: 9703-9714(2025)
- 作者机构：
  
  1. 东南大学电气工程学院,江苏省,南京市,210096
  2. 电磁能技术全国重点实验室(海军工程大学),湖北省,武汉市,430033
- 作者简介：
- 基金信息：
- DOI：10.13334/j.0258-8013.pcsee.250050
  CLC：
- Published：2025
- 稿件说明：
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QIU Chengyi, HU Liangdeng, LIN Mingyao, et al. Common-mode Voltage Suppression Method of Twelve-phase Three-level H-bridge Inverter[J]. 2025, (24): 9703-9714.
DOI：

QIU Chengyi, HU Liangdeng, LIN Mingyao, et al. Common-mode Voltage Suppression Method of Twelve-phase Three-level H-bridge Inverter[J]. 2025, (24): 9703-9714. DOI： 10.13334/j.0258-8013.pcsee.250050.

摘要

十二相开绕组电机系统是船舶大容量推进的首选方案，但电机系统脉宽调制(pulse width modulation，PWM)策略不可避免地会产生高幅值共模电压和零序电压，影响了电机系统绝缘和输出谐波性能。文中首先根据多相开绕组电机特点，将十二相开绕组电机配套H桥变频器等效为8个三相单端变频器，并利用120°解耦的简化空间矢量调制方法，实现零序电压的完全消除；其次，调整多相电机不同三相绕组的开关矢量作用次序来抑制共模电压幅值，实现十二相三电平H桥变频器共模电压幅值降低超过50%，且不影响H桥变频器原有输出谐波和中点电压控制性能；最后，通过仿真和实验验证所提算法正确性、可行性。

Abstract

The twelve-phase open-winding motor system is the preferred scheme for large-capacity propulsion of ships. However

the PWM modulation strategy of the motor system inevitably produces high-amplitude common-mode voltage and zero-sequence voltage

which affects the insulation and output harmonic performance of the motor system. First

according to the characteristics of multi-phase open-winding motor

the twelve-phase open-winding motor supporting H-bridge converter is equivalent to eight three-phase single-ended converters

and the zero-sequence voltage is completely eliminated by using the simplified space vector modulation method with 120° decoupling. Then

the switching vector action order of different three-phase windings of multi-phase motor is adjusted to suppress the amplitude of common-mode voltage

and the amplitude of common-mode voltage of twelve-phase three-level H-bridge converter is reduced by more than 50% without affecting the original output harmonics and midpoint voltage control performance of H-bridge converter. Finally

the feasibility and correctness of the proposed algorithm are verified by simulation and experiment.

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