Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Signal injection method without torque ripple for stator winding temperature estimation of surface-mounted PMSM drive systems

  • Fang, Jie (School of Electronics and Information Engineering, Anhui University) ;
  • Ding, Shichuan (School of Electronic Engineering and Automation, Anhui University) ;
  • Sun, Yining (Institute of Intelligent Machines, Chinese Academy of Sciences) ;
  • Hang, Jun (Shenzhen Research Institute, Southeast University)
  • Received : 2020.05.14
  • Accepted : 2020.09.03
  • Published : 2020.11.20
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Abstract

A signal injection method without torque ripple is presented to estimate the stator winding temperature of a surface-mounted permanent magnet synchronous machine (PMSM), where the temperature is estimated based on the stator resistance. First, the current signal (Δid*) is injected into the current control loop to produce DC current offsets used to calculate the stator resistance, where the injected signal cannot lead to extra torque ripple. Then the temperature can be obtained based on the relationship between the stator winding temperature and the stator resistance. Finally, the proposed method is validated by simulation and experimental results. In addition, no extra equipment is needed for the proposed method.

Keywords

Acknowledgement

This work is supported by the Shenzhen Science and Technology Innovation Committee (STIC) (JCYJ20170817164807994) and the Science and Technology Project of Guangxi Power Grid (0401002018030103WX00100). Thanks to Southeast University for providing the experimental platform.

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