Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Active Cancellation of PMSM Torque Ripple Caused by Magnetic Saturation for EPS Applications

  • Lee, Geun-Ho (Dept. of Electrical Eng., The Gyeongnam Provincial Namhae College)
  • Received : 2009.11.17
  • Published : 2010.03.25
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Abstract

This paper deals with a control method to reduce the torque ripple of a permanent magnet synchronous motor (PMSM) for electric power steering (EPS) systems. Such an application requires a very low torque ripple in order to maintain a good steering feel. However, because of spatial limitations, it cannot help having a partial saturation in the iron core of the PMSM for an EPS system, and this saturation results in a significant torque ripple. Thus, this paper analyzes the torque ripple caused by the magnetic saturation of a PMSM and proposes a method with respect to inductance measurement to verify the partial saturation. In addition, it is shown that a compensation current is needed in order to minimize the torque ripple when a PMSM is driven in the high torque region. The estimation process of the current and the torque ripple decreased by the current are presented and verified with test results.

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References

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Cited by

  1. Review of BLAC Motor and Drive Technology for Electric Power Steering of Vehicles vol.12, pp.9, 2011, https://doi.org/10.5762/KAIS.2011.12.9.4083
  2. Influence of Travelling Current Linkage Harmonics on Inductance Variation, Torque Ripple and Sensorless Capability of Tooth-Coil Permanent-Magnet Synchronous Machines vol.50, pp.1, 2014, https://doi.org/10.1109/TMAG.2013.2283067
  3. Active torque ripple reduction based on an analytical model of torque vol.11, pp.3, 2017, https://doi.org/10.1049/iet-epa.2016.0475
  4. Torque Ripple Reduction of a PM Synchronous Motor for Electric Power Steering using a Low Resolution Position Sensor vol.10, pp.6, 2010, https://doi.org/10.6113/JPE.2010.10.6.709