Cancellation of torque ripple accompanying space harmonics in SPMSM

Shingo Ehara, Shoji Shimomura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


In permanent magnet machines, the primary cause of pulsation torque, which is the sum of the cogging torque and the pulsating components of magnet torque, is space harmonics contained in the magnetomotive force due to the armature current and in the air gap flux density due to the rotor permanent magnets. The pulsation torque causes vibration and acoustic noise and reduces the performance of the machine in terms of speed and position control. We herein propose a method for canceling the magnet torque pulsation and cogging torque. The present paper describes the torque equation of surface-mounted permanent magnet synchronous machines, the method for canceling the pulsation torque, and the results of a computer simulation, which demonstrate the validity of the proposed method.

Original languageEnglish
Title of host publication2014 IEEE Energy Conversion Congress and Exposition, ECCE 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages8
ISBN (Print)9781479956982
Publication statusPublished - 2014 Nov 11
Event6th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2014 - Pittsburgh, United States
Duration: 2014 Sep 142014 Sep 18


Other6th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2014
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology


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