Chinese Journal of Electrical Engineering ›› 2021, Vol. 7 ›› Issue (1): 73-78.doi: 10.23919/CJEE.2021.000007

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Accurate Evaluation of Cooling System Capability of Three-phase IGBT-based Inverter*

Dan Zheng1, Puqi Ning1,2,*, Xiaoguang Chai1,2, Wei Sun1, Zhijie Qiu1, Yuhui Kang1, Han Cao1,2, Tao Fan1,2   

  1. 1. Institute of Electrical Engineering Chinese Academy of Sciences, Beijing 100190, China;
    2. School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2021-01-22 Revised:2021-02-01 Accepted:2021-03-01 Published:2021-04-19
  • Contact: * E-mail: npq@mail.iee.ac.cn
  • Supported by:
    * National Key Research and Development Program of China (2016YFB0100600).

Abstract: In this paper, an offline evaluation method for the cooling capability of three-phase insulated-gate bipolar transistor (IGBT) inverters is presented, which can better emulate real working conditions. With a properly designed sudden-stop control sequence, the conventional junction temperature monitoring method at a low current is used to calculate the junction temperature before the sudden stop of an inverter. This can solve the challenging switching loss calculation issue in conventional methods. Finally, the feasibility, control sequence, and electrical behaviors of the proposed method are validated through experimental tests.

Key words: Junction temperature monitoring, IGBT, conduction voltage