Pengpeng XIA, Shenbo YU, Rutong DOU, Fengchen ZHAI

Analytical modeling and study on noise characteristics of rotor eccentric SPMSM with unequal magnetic poles structure

The establishment of the analytical model of the rotor eccentric surface-mounted permanent magnet syn- chronous motor (SPMSM) with unequal magnetic poles structure will be beneficial to calculating the magnetic field and studying noise characteristics quickly. Based on the equivalent surface current (ESC) method and equivalent boundary method, the analytical model of the rotor eccentric SPMSM with unequal magnetic poles structure is proposed. During the modeling process, the magnetic field produced by a permanent magnet (PM) is obtained using the ESC method, and the effect on the air gap magnetic field, which arised from stator, is replaced with the concentric current sheet (CCS) magnetic field. And, the analytical results of the magnetic field are confirmed by FEM. According to the analytical model of the SPMSM, the effect on the noise characteristics, which resulted from rotor eccentricity, is researched. Moreover, the experiments of noise comparison are done. The results validate the validity of noise characteristic research. Then, the analytical model of the SPMSM is further verified

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[1] Yang YB, Wang XH, Zhang R, Ding TT, Tang RY. The optimization of pole arc coeﬀicient to reduce cogging torque in surface-mounted permanent magnet motors. IEEE Transactions on Magnetics 2006; 42 (4): 1135-1138.
2] El-Refaie AM. Fractional-slot concentrated-windings synchronous permanent magnet machines: Opportunities and challenges. IEEE Transactions on Industrial Electronics 2010; 57 (1): 107-121.
[3] Zhu ZQ, Wu LJ, Mohd Jamil ML. Distortion of back-EMF and torque of PM brushless machines due to Eccentricity. IEEE Transactions on Magnetics 2013; 49 (8): 4927-4936.
[4] Xu L, Zhang C, Zhu X, Lin M, Zheng S. Indirect analytical modeling and analysis of V-shaped interior PM synchronous machine. IEEE Access 2019; 7: 173786-173795.
[5] Zhu ZQ, Wu LJ, Xia ZP. An accurate subdomain model for magnetic field computation in slotted surface-mounted permanent-magnet machines. IEEE Transactions on Magnetics 2010; 46 (4): 1100-1115.
[6] Zhou Y, Li H, Meng G, Zhou S, Cao Q. Analytical calculation of magnetic field and cogging torque in surface- mounted permanent-magnet machines accounting for any eccentric rotor shape. IEEE Transactions on Industrial Electronics 2015; 62 (6): 3438-3447.
[7] Tabatabaei I, Faiz J, Lesani H, Razavi MTN. Modeling and simulation of a salient-pole synchronous generator with dynamic eccentricity using modified winding function theory. IEEE Transactions on Magnetics 2004; 40 (3): 1550-155.
[8] Mahmoud H, Bianchi N. Eccentricity in synchronous reluctance motors—part I: analytical and finite-element models. IEEE Transactions on Energy Conversion 2015; 30 (2): 745-753.
[9] Mahmoud H, Bianchi N. Eccentricity in synchronous reluctance motors—part II: different rotor geometry and stator windings. IEEE Transactions on Energy Conversion 2015; 30 (2): 754-760.
[10] Qian H, Guo H, Wu Z, Ding X. Analytical solution for cogging torque in surface-mounted permanent-magnet motors with magnet imperfections and rotor eccentricity. IEEE Transactions on Magnetics 2014; 50 (8): 1-15.
[11] Fu JJ, Zhu CS. Subdomain model for predicting magnetic field in slotted surface-mounted permanent-magnet machines with rotor eccentricity. IEEE Transactions on Magnetics 2012; 48 (5): 1906-1917.
[12] Rahideh A, Korakianitis T. Analytical open-circuit magnetic field distribution of slotless brushless permanent- magnet machines with rotor eccentricity. IEEE Transactions on Magnetics 2011; 47 (12): 4791-4808.
[13] Li Y, Lu Q, Zhu ZQ, Wu LJ, Li GJ et al . Analytical synthesis of air-gap field distribution in permanent magnet machines with rotor eccentricity by superposition method. IEEE Transactions on Magnetics 2015; 51 (11): 1-4.
[14] Alam FR, Abbaszadeh K. Magnetic field analysis in eccentric surface-mounted permanent-magnet motors using an improved conformal mapping method. IEEE Transactions on Energy Conversion 2016; 31 (1): 333-344.
[15] Jalali P, Boroujeni ST, Bianchi N. Simple and eﬀicient model for slotless eccentric surface-mounted pm machines. IET Electric Power Applications 2017; 11 (4): 631-639.
[16] Boroujeni ST, Jalali P, Bianchi N. Analytical modeling of no-load eccentric slotted surface-mounted PM machines: cogging torque and radial force. IEEE Transactions on Magnetics 2017; 53 (12): 1-8.
[17] Boroujeni ST, Emami SP, Jalali P. Analytical modeling of eccentric PM-inset machines with a slotless armature. IEEE Transactions on Energy Conversion 2019; 34 (3): 1466-1474.
[18] Yu SB, Tang RY. Electromagnetic and mechanical characterizations of noise and vibration in permanent magnet synchronous machines. IEEE Transactions on Magnetics 2006; 42 (4): 1335-1338.
[19] Lin F, Zuo S, Deng W, Wu S. Modeling and analysis of electromagnetic force, vibration, and noise in permanent- magnet synchronous motor considering current harmonics. IEEE Transactions on Industrial Electronics 2016; 63 (12): 7455-7466.
[20] Torregrossa D, Khoobroo A, Fahimi B. Prediction of acoustic noise and torque pulsation in PM synchronous machines with static eccentricity and partial demagnetization using field reconstruction method. IEEE Transactions on Industrial Electronics 2012; 59 (2): 934-944.
21] Han H, and Liu JL. Study of rotor eccentricity effect on permanent magnet servo motor performance. Electric Machines and Control 2016; 20 (1): 52-59 (in Chinese with an abstract in English).
[22] Li QF, Huang SR, Huang HJ. Noise and torque characteristics of permanent magnet synchronous motor with unequal pole arc structure. Journal of Zhejiang University(Engineering Science) 2018; 52 (11): 173-180 (in Chinese with an abstractin English).
[23] Boroujeni ST, Mohammadi AA, Oraee A, Oraee H. Approach for analytical modelling of axial-flux PM machines. IET Electric Power Applications 2016; 10 (6): 441-450.
[24] Wang XH, Li QF, Wang SH, Li QF. Analytical calculation of air-gap magnetic field distribution and instantaneous characteristics of brushless DC motors. IEEE Transactions on Energy Conversion 2003; 18 (3): 424-432.
[25] Wang X, Sun X, Gao P. Study on the effects of rotor-step skewing on the vibration and noise of a PMSM for electric vehicles. IET Electric Power Applications 2020; 14 (1): 131-138