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Analytical Models of Common-mode Voltage under Discontinuous Pulse-width Modulation for Inverters
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Jian ZHENG  Member, CPSS, Liangshuai LIN  Student Member, CPSS, Cunxing PENG  Student Member, CPSS, Kaihui ZHAO  Member, CPSS, Fang LIU  Student Member, CPSS
Journal of Power Supply | 2026, 24(9) : 360 - 370
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Journal of Power Supply | 2026, 24(9): 360-370
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Analytical Models of Common-mode Voltage under Discontinuous Pulse-width Modulation for Inverters
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Jian ZHENG  Member, CPSS, Liangshuai LIN  Student Member, CPSS, Cunxing PENG  Student Member, CPSS, Kaihui ZHAO  Member, CPSS, Fang LIU  Student Member, CPSS
Affiliations
  • School of Traffic and Electrical Engineering, Hunan University of Technology, Zhuzhou 412007, China
Published: 2026-09-30 doi: 10.13234/j.issn.2095-2805.2026.9.360
Outline
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Discontinuous pulse width modulation (DPWM) is widely used in high-power, high-switching three-phase inverters. With the improvement of the inverter performance requirements, the negative impact of the common-mode voltage generated by DPWM on the system cannot be ignored. In order to predict and suppress common-mode voltages, it is necessary to establish the mathematical analytical models of common-mode voltages. By applying the double Fourier series theory, the analytical models for common-mode voltage of DPWM0, DPWM1, and DPWMmax are established. The calculated spectra are derived from the analytical models. The characteristic patterns of common-mode voltage are derived and several approaches to suppressing common-mode voltage are given through the analyses and comparisons of these three analytical models and calculated spectra. Simulations and experiments are carried out based on an inverter-driven motor system, and the simulated spectra and experimental spectra of the common-mode voltage are consistent with the calculated spectra, which verifies the correctness and validity of the analytical models.

Three-phase inverter  /  discontinuous pulse width modulation  /  common-mode voltage  /  analytical model  /  double Fourier series
郑剑中国电源学会会员, 林良帅中国电源学会学生会员, 彭存性中国电源学会学生会员, 赵凯辉中国电源学会会员, 刘芳中国电源学会学生会员. 逆变器不连续脉宽调制下的共模电压解析模型. 电源学报, 2026 , 24 (9) : 360 -370 . DOI: 10.13234/j.issn.2095-2805.2026.9.360
Jian ZHENG, Liangshuai LIN, Cunxing PENG, Kaihui ZHAO, Fang LIU. Analytical Models of Common-mode Voltage under Discontinuous Pulse-width Modulation for Inverters[J]. Journal of Power Supply, 2026 , 24 (9) : 360 -370 . DOI: 10.13234/j.issn.2095-2805.2026.9.360
Funding
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  • National Natural Science Foundation of China(52477188; 62303178)
  • Hunan Provincial Natural Science Foundation of China(2025JJ80310; 2026JJ80067)
Appendix
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Year 2026 volume 24 Issue 9
55
5
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Article Info
doi: 10.13234/j.issn.2095-2805.2026.9.360
  • Receive Date：2024-12-21
  • Online Date：2026-10-29
  • Published：2026-09-30
Article Data
Affiliations
History
  • Received：2024-12-21
  • Revised：2025-01-16
  • Accepted：2025-03-13
Funding
National Natural Science Foundation of China(52477188; 62303178)
Hunan Provincial Natural Science Foundation of China(2025JJ80310; 2026JJ80067)
Affiliations
    School of Traffic and Electrical Engineering, Hunan University of Technology, Zhuzhou 412007, China
References
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