Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Simplified Impedance Modeling and Analysis for Inter-Turn Fault of IPM-type BLDC motor

  • Kim, Byeong-Woo (School of Electrical Engineering, University of Ulsan) ;
  • Kim, Kyung-Tae (School of Electrical Engineering, University of Ulsan) ;
  • Hur, Jin (School of Electrical Engineering, University of Ulsan)
  • Received : 2011.08.30
  • Accepted : 2011.10.18
  • Published : 2012.01.20
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Abstract

This paper proposes a finite element method (FEM)-based model of an interior permanent magnet (IPM)-type BLDC motor having stator inter-turn faults. We also propose impedance modeling of the magnetic characteristics. By integrating the developed model with a current-controlled voltage source inverter (CCVSI) model, the distributed characteristics of an inter-turn fault operated by a six-switch inverter are investigated considering speed control. Moreover, this paper presents the flux density distribution and torque characteristics for analyzing the inter-turn fault of an IPM-type BLDC motor. Additionally, fault impedance is required to calculate the circulating current that causes magnetic distortion. Thus, this paper proposes a method for estimating the circulating current taking into account the voltage at the shorted turn and the rotating speed. The analysis data were verified experimentally.

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References

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