## Abstract

In this paper, a mathematical model of a 12-phase flux-switching permanent magnet (FSPM) machine designed for high-powerwind power generation is established and investigated. First, the winding inductances in both the stator reference frame and the dq-axes reference frame are analyzed. It should be noted that the characteristics of the 12-phase winding inductances are different from those of its three-phase counterpart. The largest mutual inductance is much smaller than half of the self-inductance, and most mutual inductances are negligible, which brings the benefit of improved magnetic isolation between phases and causes the 12th-order inductance matrix to be sparse. Thereafter, an accurate inductance model is established, taking account of the magnetic coupling between adjacent three-phase winding sets. Finally, a flux-linkage equation, a voltage equation, a power equation, and a torque equation are derived in sequence. The effectiveness of the proposed mathematical model is verified by comparing the theoretical results with 2-D finite-element-analysis-based predictions. The work in this paper lays an important foundation for the control strategy of the 12-phase FSPM machine.

Original language | English |
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Article number | 7169610 |

Pages (from-to) | 504-516 |

Number of pages | 13 |

Journal | IEEE Transactions on Industrial Electronics |

Volume | 63 |

Issue number | 1 |

Early online date | 28 Jul 2015 |

DOIs | |

Publication status | Published - 1 Jan 2016 |

Externally published | Yes |

## Keywords

- 12-phases
- Flux-switching permanent magnet (FSPM)
- Mathematical model
- Wind power generation