Journal of Lanzhou University of Technology ›› 2024, Vol. 50 ›› Issue (2): 77-86.

• Automation Technique and Computer Technology • Previous Articles     Next Articles

Remaining useful life prediction of IGBT in electric vehicles

DU Xian-jun1,2, WNAGZi-yang1   

  1. 1. College of Electrical and Information Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China;
    2. Key Laboratory of Gansu Advanced Control for Industrial Processes, Lanzhou Univ. of Tech., Lanzhou 730050, China
  • Received:2022-03-02 Online:2024-04-28 Published:2024-04-29

Abstract: As one of the core components of electric vehicles, IGBTs' health monitoring and remaining life prediction play a vital role in proactive maintenance. The Bi-LSTM model based on Bayesian optimization and attention mechanism is proposed to predict the remaining useful life of IGBT in this paper. The proposed method can effectively improve the accuracy of IGBT remaining service life prediction. VCE-on through IGBT accelerated aging test is collected in this study, verifying its feasibility as a failure characteristic parameter. This data is used as an experimental data set to validate the proposed method through simulation. The experimental analysis results show that the proposed hybrid prediction model has lower degradation prediction error than the classical LSTM and other prediction models, demonstrating significant theoretical and practical value.

Key words: electric vehicles of IGBT, remaining life prediction, Bayesian optimization algorithm, attention mechanism, bidirectional long short-term memory

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