### Abstract

Surface permanent magnet synchronous motors (SPMSMs) have been used for high-performance applications which demand high levels of torque smoothness. This paper presents current optimization strategies to achieve the smooth torque production in SPMSMs. The proposed techniques are based on a newly developed mathematical model which takes into account spatial harmonics of the rotor magnet flux. Based on this model, the smooth torque production can be achieved by adjusting the armature current vector in the rotating frame. Consequently, the waveform of the optimized excitation current is non-sinusoidal. The current optimization algorithm requires low-computational cost. Moreover, the optimized current contributes not only to the torque ripple suppression but also to the winding resistive loss reduction. The effectiveness of the current optimization techniques is confirmed by analytical verifications by using generalized machine models. In addition to this analytical approach, simulation and experimental verifications are implemented in a typical 3-phase SPMSM which has concentrated windings.

Original language | English |
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Title of host publication | Proceedings of the 2013 IEEE International Electric Machines and Drives Conference, IEMDC 2013 |

Pages | 1188-1195 |

Number of pages | 8 |

DOIs | |

Publication status | Published - 2013 Aug 22 |

Event | 2013 IEEE International Electric Machines and Drives Conference, IEMDC 2013 - Chicago, IL, United States Duration: 2013 May 12 → 2013 May 15 |

### Publication series

Name | Proceedings of the 2013 IEEE International Electric Machines and Drives Conference, IEMDC 2013 |
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### Conference

Conference | 2013 IEEE International Electric Machines and Drives Conference, IEMDC 2013 |
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Country | United States |

City | Chicago, IL |

Period | 13/5/12 → 13/5/15 |

### Keywords

- Spatial harmonic
- stator resistive loss
- surface permanent magnet synchronous motor
- torque ripple

### ASJC Scopus subject areas

- Electrical and Electronic Engineering

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## Cite this

*Proceedings of the 2013 IEEE International Electric Machines and Drives Conference, IEMDC 2013*(pp. 1188-1195). [6556284] (Proceedings of the 2013 IEEE International Electric Machines and Drives Conference, IEMDC 2013). https://doi.org/10.1109/IEMDC.2013.6556284