Investigation of the effect of demagnetization fault at Line Start AF-PMSM with FEM

Abstract

In motors containing magnets, irreversible demagnetization failure is one of the factors that negatively affect motor performance. In this study, the traditional Axial Flux Permanent Magnet Synchronous Motor (AF-PMSM) rotor structure was changed and the structure that gained the feature of starting from the line was used. Line Start AF-PMSM with 5.5 kW shaft power has 4 poles and each pole consists of 5 magnets. Demagnetization failure was obtained by the flux values of the magnets in any pole are drawn to zero and virtual demagnetization failure is created at certain rates (20%, 40% and 60%). With FEM, the data of the healthy and faulty motor were obtained. The data are then presented comparatively. Obtained data showed that demagnetization fault in Line Start AF-PMSM negatively affects motor performance, and the results are given in detail in the article. The original aspect of the study is that the demagnetization fault in Line Start AF-PMSM was investigated for the first time with FEM.

Keywords

• Line Start
• Axial Flux PMSM
• Demagnetization fault
• FEM

References

1. X. Xiao and C. Chen, ‘Reduction of torque ripple due to demagnetization in PMSM using current compensation’, IEEE Trans. Appl. Supercond., vol. 20, no. 3, pp. 1068–1071, Jun. 2010.
2. M. Fitouri, Y. BenSalem, and M. Naceur Abdelkrim, ‘Effects of design variables on demagnetization fault in permanent magnet synchronous motor’, 2018 15th Int. Multi-Conference Syst. Signals Devices, SSD 2018, pp. 71–76, Dec. 2018.
3. B. Tian, G. Mirzaeva, Q. T. An, L. Sun, and D. Semenov, ‘Fault-Tolerant Control of a Five-Phase Permanent Magnet Synchronous Motor for Industry Applications’, IEEE Trans. Ind. Appl., vol. 54, no. 4, pp. 3943–3952, Jul. 2018.
4. M. Zhu, W. Hu, and N. C. Kar, ‘Torque-Ripple-Based Interior Permanent-Magnet Synchronous Machine Rotor Demagnetization Fault Detection and Current Regulation’, IEEE Trans. Ind. Appl., vol. 53, no. 3, pp. 2795–2804, May 2017.
5. W. Lu, M. Liu, Y. Luo, and Y. Liu, ‘Influencing factors on the demagnetization of line-start permanent magnet synchronous motor during its starting process’, 2011 Int. Conf. Electr. Mach. Syst. ICEMS 2011, 2011.
6. R. Dou, F. Song, H. Liu, and X. Men, ‘Demagnetization Quantification of PMSM Based on Support Vector Regression’, Proc. - 2018 Progn. Syst. Heal. Manag. Conf. PHM-Chongqing 2018, pp. 619–623, Jan. 2019.
7. Y. Chen, S. Liang, W. Li, H. Liang, and C. Wang, ‘Faults and diagnosis methods of permanent magnet synchronous motors: A review’, Applied Sciences (Switzerland), vol. 9, no. 10. MDPI AG, p. 2116, May 01, 2019.
8. J. X. Shen, P. Li, M. J. Jin, and G. Yang, ‘Investigation and countermeasures for demagnetization in line start permanent magnet synchronous motors’, IEEE Trans. Magn., vol. 49, no. 7, pp. 4068–4071, 2013.

9. Z. Ullah and J. Hur, ‘A Comprehensive Review of Winding Short Circuit Fault and Irreversible Demagnetization Fault Detection in PM Type Machines’, Energies, vol. 11, no. 12, pp. 1–27, 2018, Accessed: Jun. 25, 2021.
10. T. Zawilak and M. Gwozdziewicz, ‘Demagnetization process in line start permanent magnet synchronous motor’, Aug. 2018.
11. Z. Ullah, S. T. Lee, M. R. Siddiqi, and J. Hur, ‘Online Diagnosis and Severity Estimation of Partial and Uniform Irreversible Demagnetization Fault in Interior Permanent Magnet Synchronous Motor’, 2019 IEEE Energy Convers. Congr. Expo. ECCE 2019, pp. 1682–1686, Sep. 2019.
12. M. Aydin, S. Huang, and T. A. Lipo, ‘Torque quality and comparison of internal and external rotor axial flux surface-magnet disc machines’, IEEE Trans. Ind. Electron., vol. 53, no. 3, pp. 822–830, 2006.
13. R. Z. Haddad, ‘Detection and Identification of Rotor Faults in Axial Flux Permanent Magnet Synchronous Motors Due to Manufacturing and Assembly Imperfections’, IEEE Trans. Energy Convers., vol. 35, no. 1, pp. 174–183, Mar. 2020.
14. A. Parviainen, M. Niemelä, and J. Pyrhönen, ‘Modeling of axial flux permanent-magnet machines’, IEEE Trans. Ind. Appl., vol. 40, no. 5, pp. 1333–1340, Sep. 2004.
15. S Arıkan M.A.S., Sonlu Elemanlar Metodunun Mühendislikte Uygulamaları, Middle East University, Department of Mechanical Engineering.
16. Gürdal, O., Elektrik Makinalarının Tasarımı. Bursa Orhangazi University Publications, 518 pp, Bursa2015.