An optimized structure to weaken the vibration and noise of a new asymmetric permanent magnet-assisted synchronous reluctance motor (PMaSynRM) is proposed. The new asymmetric PMaSynRM has the advantages of a low torque ripple and high fault tolerance. However, the asymmetric structure generates an unbalanced magnetic force (UMF), which results in vibration and noise problems. In this study, the vibration and noise of the motor are analyzed and optimized. First, the radial pressure is analyzed, and an optimized structure is proposed. The electromagnetic performance of the motor before and after optimization is analyzed using the finite element method. Second, a three-dimensional model is established, and modal analysis is conducted considering the orthotropy of the stator and effective windings. Finally, the vibration and noise are simulated and analyzed, and the validity of the analysis results is verified experimentally. The analysis results indicate that the optimized motor realizes a reduction in the motor vibration and noise.
H Cai, B Guan, L Xu, et al. Low-cost ferrite PM-assisted synchronous reluctance machine for electric vehicle. IEEE Trans. Ind. Electron., 2014, 61(10): 5741-5748.
M Z Islam, A Arafat, S S R Bonthu, et al. Design of a robust five-phase ferrite-assisted synchronous reluctance motor with low demagnetization and mechanical deformation. IEEE Trans. Energy Convers., 2019, 34(2): 722-730.
B Ma, S Yu, F Zhang, et al. Structure and cooling system design of new dual stator permanent magnet assisted reluctance motor. Journal of Electrical Engineering, 2020, 15(1): 55-61.
M Xu, G Liu, Q Chen, et al. Design and optimization of a fault tolerant modular PMaSynRM with torque ripple minimization. IEEE Trans. Ind. Electron., 2021, 68(9): 8519-8530.
H Lan, J Zou, Y Xu, et al. Investigation of unbalanced magnetic force in permanent magnet synchronous machines with asymmetric design. IEEE Trans. Magn., 2018, 54(11): 8203305.
S Abdi, E Abdi, H Toshani, et al. Vibration analysis of brushless doubly fed machines in the presence of rotor eccentricity. IEEE Trans. Energy Convers., 2020, 35(3): 1372-1380.
Z Q Zhu, M L M Jamil, L J Wu, et al. Influence of slot and pole number combinations on unbalanced magnetic force in PM machines diametrically asymmetric windings. IEEE Trans. Ind. Appl., 2013, 49(1): 19-30.
F Rezaee-Alam, B Rezaeealam, J Faiz, et al. Unbalanced magnetic force analysis in eccentric surface permanent-magnet motors using an improved conformal mapping method. IEEE Trans. Energy Convers., 2017, 32(1): 146-154.
C Lin, S Wang, M Moallem, et al. Analysis of vibration in permanent magnet synchronous machines due to variable speed drives. IEEE Trans. Energy Convers., 2017, 32(2): 582-590.
W Deng, S Zuo. Electromagnetic vibration and noise of the permanent-magnet synchronous motors for electric vehicles: An overview. IEEE Trans. Transport. Electrific., 2019, 5(1): 59-70.
Y Mao, G Liu, W Zhao, et al. Vibration prediction in fault-tolerant flux-switching permanent-magnet machine under healthy and faulty conditions. IET Electric Power Applications., 2016, 11(1): 19-28.
Y Lu, J Li, R Qu, et al. Electromagnetic force and vibration analysis of permanent magnet assisted synchronous reluctance machines. IEEE Trans. Ind. Appl., 2018, 54(5): 4246-4256.
Z Song, C Liu, H Zhao. Investigation on magnetic force of a flux-modulated double-rotor permanent magnet synchronous machine for hybrid electric vehicle. IEEE Trans. Transport. Electrific., 2019, 5(4): 1383-1394.
Z Tang, P Pillay, A M Omekanda, et al. Young’s modulus for laminated machine structures with particular reference to switched reluctance motor vibrations. IEEE Trans. Ind. Appl., 2004, 40(3): 748-754.
S Hu, S Zuo, H Wu, et al. An analytical method for calculating the natural frequencies of a motor considering orthotropic material parameters. IEEE Trans. Ind. Electron., 2019, 66(10): 7520-7528.
F Chai, Y Li, Y Pei, et al. Accurate modelling and modal analysis of stator system in permanent magnet synchronous motor with concentrated winding for vibration prediction. IET Electric Power Applications., 2018, 12(8): 1225-1232.
X Wang, X Sun, P Gao, et al. Study on the effects of rotor-step skewing on the vibration and noise of a PMSM for electric vehicles. IET Electric Power Applications, 2019, 14(1): 131-138.
J Boisson, F Louf, J Ojeda, et al. Analytical approach for mechanical resonance frequencies of high-speed machines. IEEE Trans. Ind. Electron., 2014, 61(6): 3081-3088.
Y Mao, G Liu, W Zhao, et al. Low-noise design of fault-tolerant flux-switching permanent-magnet machines. IET Electric Power Applications, 2018, 12(6): 747-756.
S Wang, J Hong, Y Sun, et al. Filling force valley with interpoles for pole-frequency vibration reduction in surface-mounted PM synchronous machines. IEEE Trans. Ind. Electron., 2020, 67(8): 6709-6720.
H Yang, Y Lim, H Kim, et al. Acoustic noise/vibration reduction of a single-phase SRM using skewed stator and rotor. IEEE Trans. Ind. Electron., 2013, 60(10): 4292-4300.
W Zhang, Y Xu, Y Huang, et al. Reduction of high-frequency vibration noise for dual-branch three-phase permanent magnet synchronous motors. Chinese Journal of Electrical Engineering, 2020, 6(2): 42-51.
G Xu, Z Jia, W Zhao, et al. Multi-objective optimization design of inset-surface permanent magnet machine considering deterministic and robust performances. Chinese Journal of Electrical Engineering, 2021, 7(3): 73-87.
Y Mao, W Zhao, S Zhu, et al. Vibration investigation of spoke-type PM machine with asymmetric rotor considering modulation effect of stator teeth. IEEE Trans. Ind. Electron., 2021, 68(10): 9092-9103.
K H Yim, J W Jang, G H Jang, et al. Forced vibration analysis of an IPM motor for electrical vehicles due to magnetic force. IEEE Trans. Magn., 2012, 48(11): 2981-2984.
A K Putri, S Rick, D Franck, et al. Application of sinusoidal field pole in a permanent-magnet synchronous machine to improve the NVH behavior considering the MTPA and MTPV operation area. IEEE Trans. Ind. Appl., 2016, 52(3): 2280-2288.
S Das, O Gundogmus, Y Sozer, et al. Wide speed range noise and vibration mitigation in switched reluctance machines with stator pole bridges. IEEE Trans. Power Electron., 2021, 36(8): 9300-9311.