Formula Expression of Airgap Leakage flux Coefficient of Axial-Flux Permanent Magnet Motor

Xiao Gong, Yanliang Xu, Feng Xin


Airgap leakage flux coefficient is one of the main parameters which must be given ahead of time when performing initial designs or getting performance results by magnetic circuit analysis for any kinds of electrical machines. Three -dimensional finite element method (3D-FEM) is the most reliable one to obtain the accurate leakage flux coefficient for axial-flux permanent magnet (AFPM) motor which definitely takes a much long time and is not advantageous to the motor’s initial and optimal design. By constituting the accurate lumped-parameter magnetic circuit (LPMC) model and computing the resultant magnetic reluctances, the analytical formula of the leakage flux coefficient of AFPM is given which is verified by 3D-FEM and the prototyped AFPM experiment. 

Full Text:



Tang Renyuan. Modern Permanent Magnet Machines-Theory and Design. Beijing: China Machine Press. 1997.

Wang Xiuhe. Permanent Magnet Motors [M]. Beijing: China Electric Power Press. 2007.

Qu Ronghai, Thomas A Lipo. Analysis and modeling of air-gap and zigzag leakage fluxes in a surface-mounted permanent magnet machine. IEEE Transactions on Industry Applications. 2004; 40(1): 121-127.

Yu Chen, Zhu Ziqiang. Three dimensional lumped parameter magnetic circuit analysis of single phase flux switching permanent magnet motor. IEEE Transactions on Industry Applications. 2008; 44(6): 1701-1710.

Zhu Ziqiang, et al. Analysis of electromagnetic performance of flux switching permanent magnet Machines by nonlinear adaptive lumped parameter magnetic circuit model. IEEE Transactions on Magnetics. 2005; 41(11): 4277-4287.

DC Hanselman. Brushless Permanent-magnet Motor Design. New York: McGraw-Hill.1994.

Llka, Reza, Gholamian S, Asghar. Optimum design of a five-phase PMSM underwater vehicles by use of PSO. TELKOMNIKA. 2012; 10(5): 925-932.

Yanliang Xu, Xiquan Liu. Development of tubular linear permanent magnet synchronous motor used in oil-well field. TELKOMNIKA. 2011; 9(3): 515-522.


Article Metrics

Abstract view : 0 times
PDF - 0 times


  • There are currently no refbacks.

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

TELKOMNIKA Telecommunication, Computing, Electronics and Control
ISSN: 1693-6930, e-ISSN: 2302-9293
Universitas Ahmad Dahlan, 4th Campus
Jl. Ringroad Selatan, Kragilan, Tamanan, Banguntapan, Bantul, Yogyakarta, Indonesia 55191
Phone: +62 (274) 563515, 511830, 379418, 371120 ext. 4902, Fax: +62 274 564604