微特电机 ›› 2018, Vol. 46 ›› Issue (7): 1-5.doi: 1004-7018-46-7-1-5

• 理论研究 •    下一篇

不等厚磁极永磁电机解析法分析

倪有源,刘跃斌   

  1. 合肥工业大学,合肥 230009
  • 收稿日期:2017-04-13 出版日期:2018-07-28 发布日期:2018-07-28

Analytical Calculation of Permanent Magnet Machines with Unequal Thickness Magnets

NI You-yuan,LIU Yue-bin   

  1. Hefei University of Technology,Hefei 230009,China
  • Received:2017-04-13 Online:2018-07-28 Published:2018-07-28

摘要:

采用等效面电流的解析法求解不等厚磁极永磁电机的性能。推导在内弧偏心情形下,径向磁化和平行磁化无槽永磁电机的气隙磁密解析式;引入相对磁导函数,求解有槽电机的气隙磁密,进一步得到电机的反电动势以及电磁转矩等参数。对一台不等厚磁极永磁电机,给出了解析法计算结果。通过有限元法验证了该解析法的正确性。

关键词: 永磁电机, 不等厚磁极, 等效面电流, 相对磁导函数, 解析法

Abstract:

The performances of a permanent magnet (PM) machine with unequal thickness magnetic poles were solved by an analytical method with equivalent surface current. The air-gap flux density distribution in a slotless PM machine was obtained analytically for the inner arc eccentric. For the slotted PM machine, the air-gap flux density was derived through the relative permeance function. In addition, the back electromotive force and electromagnetic torque were also derived. The analytical results were presented for a PM machine with unequal thickness magnetic poles and were verified by a finite element method.

Key words: PM machine, unequal thickness magnetic pole, equivalent surface current, relative permeance function, analytical method

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