Abstract
This paper presents an analytical study for the air gap magnetic flux and stray flux distribution of the electric vehicle used permanent magnet motor. The air gap magnetic flux density is obtained by calculating magnetomotive force and magnetic circuit, and the stray flux density is solved through a medium based attenuation model. To construct the magnetic circuit of the motor, the magnet refinement, slot simplification and air gap reluctance subdivision are delivered in this manuscript. As for seeking the stray flux distribution, the stator yoke, machine housing, and air are regarded as an ideal homogeneous medium. An electromagnetic model is used to constitute the attenuation coefficient of each component in the motor. The air gap flux density, coil flux linkage, back electromotive force (back-EMF), and stray flux density are obtained through the proposed analytical model and compared with the finite element analysis (FEA). Finally, an experiment test bench is built to get the stray flux. The actual stray flux density is captured outside the machine frame. Compared to finite element analysis, the research shows in this paper is less time-consuming and better comprehension to the flux path of the motors.
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Acknowledgements
This work is supported by the National Natural Science Foundation of China under Grant 51907016.
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Dai, X., Liu, Z., Wang, N. (2022). A Magnetic Field Analysis Research of Permanent Magnet Motor. In: Cao, W., Hu, C., Huang, X., Chen, X., Tao, J. (eds) Conference Proceedings of 2021 International Joint Conference on Energy, Electrical and Power Engineering. Lecture Notes in Electrical Engineering, vol 916. Springer, Singapore. https://doi.org/10.1007/978-981-19-3171-0_3
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DOI: https://doi.org/10.1007/978-981-19-3171-0_3
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