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IGBT Junction Temperature Extraction Method Based on Novel Composite Observer
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Chengyang HUANG, Jianping SUN, Chuan XIE, Jianxiao ZOU
Journal of Power Supply | 2025, 23(7) : 330 - 337
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Journal of Power Supply | 2025, 23(7): 330-337
• Power Semiconductor Devices •
IGBT Junction Temperature Extraction Method Based on Novel Composite Observer
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Chengyang HUANG, Jianping SUN, Chuan XIE, Jianxiao ZOU
Affiliations
  • School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Published: 2025-11-30 doi: 10.13234/j.issn.2095-2805.2025.7.330
Outline
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Extracting the junction temperature of an insulate-gate bipolar transistor (IGBT) module is an essential part for its health monitoring and lifetime evaluation. The commonly used open-loop observer suffers from a lack of disturbance rejection capability, while the closed-loop scheme is infeasible since the states of a heat transfer system are not completely observable. Therefore, a composite observer suitable for online IGBT junction temperature extraction is proposed, where a closed-loop part is built therein via the observable states and the residual unobservable states construct an open-loop part. Aimed at an H-bridge inverter constructed with FF225R12ME4 IGBT chip, the design procedure of the composite observer is given in detail. Finally, real-time simulations of the composite observer were conducted on a hardware-in-loop (HiL) system, i.e., dSPACE DS1202. The HiL simulation results verified the superiority of the proposed composite observer in suppressing the effect of loss calculation errors on the estimation accuracy over the conventional open-loop observer.

Power converter  /  thermal network model  /  IGBT junction temperature extraction  /  observer
黄成洋, 孙建平, 谢川, 邹见效. 一种基于新型复合观测器的IGBT结温提取方法. 电源学报, 2025 , 23 (7) : 330 -337 . DOI: 10.13234/j.issn.2095-2805.2025.7.330
Chengyang HUANG, Jianping SUN, Chuan XIE, Jianxiao ZOU. IGBT Junction Temperature Extraction Method Based on Novel Composite Observer[J]. Journal of Power Supply, 2025 , 23 (7) : 330 -337 . DOI: 10.13234/j.issn.2095-2805.2025.7.330
Funding
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  • Youth Program of National Natural Science Foundation of China(51807021; 52107181)
  • Science and Technology Planning Project of Sichuan Province(2022YFG0147)
Appendix
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Year 2025 volume 23 Issue 7
57
5
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Article Info
doi: 10.13234/j.issn.2095-2805.2025.7.330
  • Receive Date：2023-02-08
  • Online Date：2026-10-26
  • Published：2025-11-30
Article Data
Affiliations
History
  • Received：2023-02-08
  • Revised：2023-06-08
  • Accepted：2023-07-13
Funding
Youth Program of National Natural Science Foundation of China(51807021; 52107181)
Science and Technology Planning Project of Sichuan Province(2022YFG0147)
Affiliations
    School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
References
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https://castjournals.cast.org.cn/joweb/dyxb/EN/10.13234/j.issn.2095-2805.2025.7.330
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