LOW VOLTAGE APPARATUS ›› 2025, Vol. 0 ›› Issue (2): 24-28.doi: 10.16628/j.cnki.2095-8188.2025.02.004

• Research & Analysis • Previous Articles     Next Articles

Research on Method of Three-Level Circuit Loss Analysis and Temperature Rise Optimization

CHEN Kunpeng1, XIAO Wenxun2   

  1. 1. Sineng Electric Co.,Ltd., Wuxi 214000, China
    2. School of Electric Power Engineering, South China University of Technology, Guangzhou 510000, China
  • Received:2024-10-26 Online:2025-02-28 Published:2025-03-31

Abstract:

Aiming at the problem of unbalanced loss distribution in the diode neutral-point-clamped (NPC) three-level circuit,the active neutral-point-clamped (ANPC) three-level circuit is adopted.Different current paths are selected to disperse the device losses among different switching tubes.Through theoretical calculation of losses,thermal simulation and experimental verification,the comparative analysis of the device losses and temperature rises of the two circuits is carried out.The results show that the ANPC circuit has a significant effect on balancing the device losses and reducing the device temperature rise.

Key words: three level circuit, loss analysis, temperature rise optimization, balance device

CLC Number: