Abstract
The loss of outer rotor permanent magnet synchronous motor is mainly distributed in the stator core and windings, and the heat is difficult to dissipate. A commonly used cooling method is to inject cooling oil into the air gap, but it will increase the weight and friction loss of the motor, so the cooling oil will not fill the entire air gap, resulting in cooling difficulties in the part not immersed in the cooling oil and uneven distribution of stator temperature. Therefore, in this paper a low-speed outer rotor permanent magnet motor structure with rotor oil storage slots is proposed, which can dissipate heat with oil cooling. Through the fluid field analysis model, the air gap fluid field is simulated respectively, and the influence of oil storage slots on the air gap refrigerant distribution under different rotating speeds is compared and analyzed. In order to improve the calculation speed and simulation accuracy, a simulation method combining the transient fluid field with the steady-state temperature field is proposed. Based on the oil distribution obtained from the transient fluid field analysis, the temperature field of the motor is simulated and analyzed, and the improvement effect of the oil storage slots on the temperature field distribution of the motor is verified.
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References
Yin Q, Li W, Zhang X (2011) Analysis on temperature fields in HSPMG with grooves two dimensional optimal. Proc CSEE 31(36):77–85
Cheng S, Li C, Chai F (2012) Analysis of the 3D steady temperature field of induction motors with different cooling structures in mini electric vehicles. Proc CSEE 32(30):82–90
Li C, Guan Z, Ding X et al (2019) Design and development of motor cooling system for electric vehicles. Small Spec Electr Mach 47(1):82–85
Sueyoshi M, Shinichi N, Makoto M et al (2013) Development of a totally enclosed fan-cooled traction motor. IEEE Trans Ind Appl 49(4):1508–1514
Kai Y, Yaojing F (2010) Design of novel spiral magnetic poles and axial-cooling structure of outer-rotor PM torque motor. IEEE Trans Appl Supercond 20(3):838–841
Boglietti A, Cavagnino A (2007) Analysis of the endwinding cooling effects in tefc induction motors. IEEE Trans Ind Appl 43(5):1214–1222
Tenconi A, Profumo F, Bauer SE et al (2008) Temperatures evaluation in an integrated motor drive for traction applications. IEEE Trans Ind Electron 55(10):3619–3626
Li C, Chai F, Cheng S (2012) Research on the effects of cooling water velocity on temperature rise of the water-cooled motor in electric vehicles. Electr Mach Control 16(9):1–8
Staton D, Boglietti A, Cavagnino A (2005) Solving the more difficult aspects of electric motor thermal analysis in small and medium size industrial induction motors. IEEE Trans Ind Convers 20(3):620–628
Wang X, Cao P (2016) Analysis of 3-D temperature field of in-wheel motor with inner-oil cooling for electric vehicle. Electr Mach Control 20(3):36–41
Shen J, Wang Y, Zhou F et al (2021) Low-speed outer rotor permanent magnet motor with rotor oil storage hole groove, 2021-01-26
Zhang Z, Wang H, Han X et al (2019) Design and analysis of a consequent-pole permanent magnet wind generator. Micro Motors 52(8):1–2
Wu L, Qu R (2014) Comparison of conventional and consequent pole interior permanent magnet machines for electric vehicle application. In: International conference on electrical machines & systems, Hangzhou, China
Li W, Li S, Xie Y et al (2007) Stator-rotor coupled thermal field numerical calculation of induction motors and correlated factors sensitivity analysis 27(24):85–86
Han L, Jiao X, Li J et al (2013) Temperature field analysis and calculation of brushless doubly-fed machines considering global region and different operating states. Electr Mach Control 17(5):2–3
Idoughi L, Mininger X, Bouillault F et al (2011) Thermal model with winding homogenization and fit discretization for stator slots. IEEE Trans Magn 47(12):4822–4826
Cao J, Li W, Cheng S et al (2008) Temperature field calculation and associated factor analysis of induction motor with compound cage rotor. Proc CSEE 28(30):97–98
Gu K (2018) Temperature field simulation and heat dissipation design of outer rotor in-wheel motor for electric vehicle. Hunan University, Changsha
Yang C (2012) Temperature field analysis of permanent magnet synchronous motor used in electric vehicles. Beijing Jiaotong University, Beijing
Yang S, Tao W (2002) Heat transfer. Higher Education Press, Beijing, pp 6–8
Simpson N, Wrobel R, Mellor PH (2013) Estimation of equivalent thermal parameters of impregnated electrical windings. IEEE Trans Ind Appl 49(6):2508–3250
Acknowledgements
This work was supported in part by the National Science Foundation of China under Grant 51837010 and Grant 51690182.
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Tang, Zp., Wang, Yc., Zhou, F., Yu, Fy., Gieras, J.F., Shen, Jx. (2022). Study on Heat Dissipation of Low-Speed Outer Rotor Permanent Magnet Motor Based on Multi-phase Flow Model. 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_50
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DOI: https://doi.org/10.1007/978-981-19-3171-0_50
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