A Comparative Analysis of Test Methods of Measuring d- and q-Axes Inductances for Interior Permanent Magnet Synchronous Motor

매입형 영구자석 동기전동기의 인덕턴스 측정법 비교 분석

  • 김승주 (한양대 전기공학과) ;
  • 김철진 (한라대 제어계측공학과) ;
  • 이주 (한양대 전기공학과)
  • Published : 2009.05.01


The performance analysis and robust control of the interior permanent magnet synchronous motor(IPMSM) greatly depend on accurate value of its parameters. To achieve the high performance of torque control, it is necessary to consider exact inductance values because the inductances are nonlinear parameters of operating the IPMSM. Therefore many different methods have been performed for analysis of the methodology for the exact measurement of synchronous inductances. None of them is considered standard, and accuracy levels of all these methods are also not consistent. Among these experimental methods, the DC current decay test and the vector current control test are ideal for a laboratory environment. In this paper, these two test methods are compared by applying inductances to the IPMSM. The paper analyzes the measured inductances of the two methods and their differences with inductances obtained from the finite element method(FEM).


Interior permanent magnet synchronous motor;IPMSM;Inductance;Ld;Lq;Parameter measurement


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