### Abstract

In this paper, a semianalytical model for the calculation of the torque produced by an iron-cored linear permanent-magnet motor is presented. The torque is calculated by means of the Maxwell stress tensor, which requires a description of the magnetic flux density distribution. The two-dimensional distribution is obtained from a semianalytical harmonic model, which accounts for the slotting and
finite length of the iron yoke. An analytical expression for the thrust and normal force is obtained by evaluating the Maxwell stress tensor over a line through the air gap. For the torque calculation, the Maxwell stress tensor is numerically integrated along a contour that closely follows the structure of the yoke. The resulting torque and forces show good agreement with finite-element (FE) results.

Original language | English |
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Title of host publication | Proceedings of the IEEE International Magnetics Conference (INTERMAG 2012), 7-11 May 2012, Vancouver, Canada |

Publisher | Institute of Electrical and Electronics Engineers |

Pages | 3575-3578 |

DOIs | |

Publication status | Published - 2012 |

Event | 2012 IEEE International Magnetics Conference (INTERMAG 2012) - Vancouver, Canada Duration: 7 May 2012 → 11 May 2012 http://www.2012.intermagconference.com/ |

### Publication series

Name | IEEE Transactions on Magnetics |
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Volume | 48 |

ISSN (Print) | 0018-9464 |

### Conference

Conference | 2012 IEEE International Magnetics Conference (INTERMAG 2012) |
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Abbreviated title | INTERMAG 2012 |

Country | Canada |

City | Vancouver |

Period | 7/05/12 → 11/05/12 |

Internet address |

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## Cite this

Overboom, T. T., Smeets, J. P. C., Jansen, J. W., & Lomonova, E. (2012). Semianalytical calculation of the torque in a linear permanent magnet motor with finite yoke length. In

*Proceedings of the IEEE International Magnetics Conference (INTERMAG 2012), 7-11 May 2012, Vancouver, Canada*(pp. 3575-3578). (IEEE Transactions on Magnetics; Vol. 48). Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/TMAG.2012.2197602