Further Investigations on Unconventional Slot Numbers in Concentrated Winding Electric Motors: Rotor Eccentricity and Conventional Methods for Torque Ripple Reduction

被引:0
作者
Koenigs, Mike [1 ]
Harmel, Michael [1 ]
Loehlein, Bernd [1 ]
机构
[1] Flensburg Univ Appl Sci, Flensburg, Germany
关键词
synchronous motor; torque ripple; cogging torque; concentrated winding; permanent magnet; BACK-EMF; DESIGN;
D O I
10.2478/pead-2025-0006
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Electric motors with unconventional slot numbers, especially prime numbers, have been shown to reduce cogging torque and torque ripple. Our previous study investigated an 8p12s servo motor topology known to be prone to cogging torque and torque ripple; in this publication, the research is expanded to a more robust 10p12s servomotor, including a comparison of the novel unconventional winding with a conventional topology with breadloaf magnets. Furthermore, Finite element method (FEM) simulations with rotor eccentricities are conducted to evaluate the impact of the novel topology on forces and torques under imperfect manufacturing. It is shown that the novel quadruple-layer topology with prime number of slots can effectively reduce cogging torque and torque ripple. Furthermore, the commonly used 10p12s servomotor topology can achieve similar performance using skewing and breadloaf permanent magnets. The novel topology is shown to be prone to torque ripple due to rotor eccentricity. Similar results to conventional concentrated windings can be achieved under imperfect manufacturing conditions.
引用
收藏
页码:96 / 109
页数:14
相关论文
共 17 条
[1]  
Azar Z., Zhu Z.Q., Ombach G., Influence of Electric Loading and Magnetic Saturation on Cogging Torque, Back-EMF, and Torque Ripple of PM Machines, IEEE Transactions on Magnetics, 48, 10, pp. 2650-2658, (2012)
[2]  
Barbini N., Tessarolo A., Concentrated winding electrical machine modelling, design, and optimization, (2019)
[3]  
Brescia E., Palmieri M., Cascella G.L., Cupertino F., Optimal tooth tips design for cogging torque suppression of permanent magnet machines with a segmented stator core, 2020 International Conference on Electrical Machines (ICEM), (2020)
[4]  
Dai Y., Lee H.J., Torque Ripple and Electromagnetic Vibration Suppression of Fractional Slot Distributed Winding ISG Motors by Rotor Notching and Skewing, Energies, 17, 19, (2024)
[5]  
Han S.H., Jahns T., Guven M., Aydin M., Soong W., Impact of maximum back-EMF limits on the performance characteristics of interior permanent magnet synchronous machines, IEEE Industry Applications Society Annual Meeting (IAS), (2006)
[6]  
Hsieh M.F., Hsu Y.S., An Investigation on the Influence of Magnet Arc Shaping Upon Back Electromotive Force Waveforms for the Design of Permanent-Magnet Brushless Motors, IEEE Transactions on Magnetics, 41, 11, pp. 3949-3951, (2005)
[7]  
Hu Y., Zhu S., Liu C., Wang K., Electromagnetic Performance Analysis of Interior PM Machines for Electric Vehicle Applications, IEEE Transactions on Energy Conversion, 33, 1, pp. 199-208, (2018)
[8]  
Jussila H., Salminen P., Niemela M., Pyrhonen J., Guidelines for designing concentrated winding fractional slot permanent magnet machines, 2007 International Conference on Power Engineering, Energy and Electrical Drives, pp. 191-194, (2007)
[9]  
Koenigs M., Kremp C., Holtorf J., Harmel M., Loehlein B., Improving Concentrated Winding Electric Drives Performance: Torque Ripple Reduction Through Non-Standard Stator Slot Numbers, (2025)
[10]  
Li Y., Liu M., Kim J.H., Sarlioglu B., Torque ripple reduction and mechanical tolerance analysis of a novel dual-stator 6/4 flux-switching permanent magnet machine, 2017 IEEE International Electric Machines and Drives Conference (IEMDC), pp. 1-8, (2017)