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Reliability Improvement Strategy for Cascaded H-bridge Converter Based on Carrier Reconstruction
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Xin JIN  Student Member, CPSS1, Zhixiang ZOU  Member, CPSS1, Xinlei LIU1, Buticchi GIAMPAOLO2, Ke MA  Senior Member, CPSS3
Journal of Power Supply | 2026, 24(4) : 323 - 339
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Journal of Power Supply | 2026, 24(4): 323-339
• Fault Diagnosis and Reliability •
Reliability Improvement Strategy for Cascaded H-bridge Converter Based on Carrier Reconstruction
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Xin JIN  Student Member, CPSS1, Zhixiang ZOU  Member, CPSS1, Xinlei LIU1, Buticchi GIAMPAOLO2, Ke MA  Senior Member, CPSS3
Affiliations
  • 1.School of Electrical Engineering, Southeast University, Nanjing 210096, China
  • 2.School of Electrical and Electronic Engineering, University of Nottingham Ningbo, Ningbo 315100, China
  • 3.School of Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
Published: 2026-04-30 doi: 10.13234/j.issn.2095-2805.2026.4.323
Outline
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To address the issue of uneven thermal stress distribution in power devices under in-phase disposition PWM (IPD-PWM), an improved carrier disposition PWM strategy is proposed. Aimed at enhancing the reliability of converter systems, this strategy leverages the concept of carrier reconstruction by optimizing the dynamic distribution ranges of modulation waves and carriers. With a focus on balancing the switching losses among submodules, the mechanism by which the modulation wave range influences switching losses at varying modulation ratios is analyzed in depth. The results of Matlab-PLECS co-simulation thermal modeling and experiments on a seven-level converter platform verify that the improved strategy achieves balanced thermal stress distribution in power devices while maintaining output harmonic characteristics identical to those under the traditional IPD-PWM. Consequently, the overall lifetime of the converter is significantly extended.

Cascaded H-bridge converter  /  in-phase disposition PWM (IPD-PWM)  /  reliability  /  carrier reconstruction  /  switching loss
金鑫中国电源学会学生会员, 邹志翔中国电源学会会员, 刘鑫磊, Buticchi Giampaolo, 马柯中国电源学会高级会员. 基于载波重构的级联H桥变流器可靠性提升策略. 电源学报, 2026 , 24 (4) : 323 -339 . DOI: 10.13234/j.issn.2095-2805.2026.4.323
Xin JIN, Zhixiang ZOU, Xinlei LIU, Buticchi GIAMPAOLO, Ke MA. Reliability Improvement Strategy for Cascaded H-bridge Converter Based on Carrier Reconstruction[J]. Journal of Power Supply, 2026 , 24 (4) : 323 -339 . DOI: 10.13234/j.issn.2095-2805.2026.4.323
Funding
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  • National Key Research and Development Program of China(2022YFB3403102)
  • National Natural Science Foundation of China(52377171)
  • Fundamental Research Funds for Central Universities(2242024K40030)
Appendix
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Year 2026 volume 24 Issue 4
26
3
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Article Info
doi: 10.13234/j.issn.2095-2805.2026.4.323
  • Receive Date：2025-05-29
  • Online Date：2026-10-29
  • Published：2026-04-30
Article Data
Affiliations
History
  • Received：2025-05-29
  • Revised：2025-07-14
  • Accepted：2025-08-05
Funding
National Key Research and Development Program of China(2022YFB3403102)
National Natural Science Foundation of China(52377171)
Fundamental Research Funds for Central Universities(2242024K40030)
Affiliations
    1.School of Electrical Engineering, Southeast University, Nanjing 210096, China
    2.School of Electrical and Electronic Engineering, University of Nottingham Ningbo, Ningbo 315100, China
    3.School of Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
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https://castjournals.cast.org.cn/joweb/dyxb/EN/10.13234/j.issn.2095-2805.2026.4.323
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