Development and Application of Low-Speed and High-Torque Permanent Magnet Synchronous Motor

Abstract:

To meet the demands of direct-drive petroleum equipment, developed a low-speed and high-torque permanent magnet synchronous motor. By analyzing and identifying the suitable key parameters such as permanent magnet structure parameters, air gap length, type and size of Stator Slot and so on, designed permanent magnet synchronous motor with the torque 10800 Nm, the rated speed 30 r/min and high efficiency and power factor. Obtained the flux density distribution situation and characteristic curves under no-load working condition through simulation and analysis. Manufactured the low-speed and high-torque permanent magnet synchronous motor and applied it to pumping unit. Test results show that this motor has many advantages such as wide range of speed regulation, small torque ripple, smooth operation and other characteristics. The Direct-drive Pumping Unit used this permanent magnet synchronous motor can save 20% energy than the beam pumping unit, so its social and economic benefits are significant.

• Periodical: Applied Mechanics and Materials (Volumes 229-231)
• Pages: 888-894
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.229-231.888
• Online since: November 2012
• Authors: Jun Guo Cui, Wen Sheng Xiao, Jian Bo Zhao, Jing Xi Lei, Xiao Dong Wu, Zhi Gang Wang
• Keywords: Characteristic Curve, Energy Saving, High Efficiency, High Torque, Low-Speed, Permanent Magnet Synchronous Motor (PMSM)

References

[1] BO Bao-zhong, SU Yan-min, XIE Li-hua, HOU Li-jun: The Development of Rare Earth Permanent Magnet synchronous Motors for Oil-pumping Units. Micromotor, 2000, Vol. 33(5), pp.48-49.

[2] Dou Manfeng, Liu Weiguo: On Designing High-Efficiency and Energy-Saving REPMSM(Rare Earth Permanent Magnet Synchronous Motor) for Use in Chinese Oil Fields. Journal of Northwestern Polytechnical University, 2004, Vol. 22(3), pp.355-359.

[3] Wang Xiuhe, in: YONG CI DIAN JI, edited by Qi Wei, chapter 8, Beijing: China Electric Power Press (2007).

[4] Tang Renyuan, in: Modern Permanent Magnet Machines, edited by Li Zhenbiao, chapter 6, Beijing: China Machine Press (1997).

[5] Qin Lan: Design and Analysis of Self-starting Low-speed and High-torque Permanent Magnet Synchronous Motor. Science&Technology Information, 2011, Vol. 36(1), pp.82-83.

[6] P. Salminen, J. Pyrhönen, M. Niemelä: A Comparison between Surface Magnets and Embedded Magnets in Fractional Slot Wound PM Motors. Computer Engineering in Applied Electromagnetism, Printed in Great Britain, p.209–214.

DOI: 10.1007/1-4020-3169-6_36

[7] Rich Schiferl, T.A. Lipo: Core Loss in Buried Magnet Permanent Magnet Synchronous Motors. Department of Electrical&Computer Engineering, University of Wisconsin Madison, Research Report(88-6).

DOI: 10.1109/mper.1989.4310765

[8] Yan Shuai: Research on Rare Earth Permanent Magnet synchronous Motors for Pumping Units on oilfield. （Master Dissertation, Northwestern Polytechnical University, Xi'an 2003).