Full Text:   <3611>

CLC number: TM351

On-line Access: 

Received: 2008-11-12

Revision Accepted: 2009-02-03

Crosschecked: 2009-02-16

Cited: 0

Clicked: 6237

Citations:  Bibtex RefMan EndNote GB/T7714

-   Go to

Article info.
1. Reference List
Open peer comments

Journal of Zhejiang University SCIENCE A 2009 Vol.10 No.4 P.471-477


Research and industrial application of a novel compound permanent magnet synchronous machine

Author(s):  Cheng-zhi FAN, Ming-xing HUANG, Yun-yue YE

Affiliation(s):  School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   fanchengzhi@zju.edu.cn, minshing@zju.edu.cn

Key Words:  Compound permanent magnet synchronous machine (CPMSM), Operating characteristic, Three-dimensional finite element analysis, Cogging torque, Direct-drive pumping unit

Share this article to: More |Next Article >>>

Cheng-zhi FAN, Ming-xing HUANG, Yun-yue YE. Research and industrial application of a novel compound permanent magnet synchronous machine[J]. Journal of Zhejiang University Science A, 2009, 10(4): 471-477.

@article{title="Research and industrial application of a novel compound permanent magnet synchronous machine",
author="Cheng-zhi FAN, Ming-xing HUANG, Yun-yue YE",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Research and industrial application of a novel compound permanent magnet synchronous machine
%A Cheng-zhi FAN
%A Ming-xing HUANG
%A Yun-yue YE
%J Journal of Zhejiang University SCIENCE A
%V 10
%N 4
%P 471-477
%@ 1673-565X
%D 2009
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A0820789

T1 - Research and industrial application of a novel compound permanent magnet synchronous machine
A1 - Cheng-zhi FAN
A1 - Ming-xing HUANG
A1 - Yun-yue YE
J0 - Journal of Zhejiang University Science A
VL - 10
IS - 4
SP - 471
EP - 477
%@ 1673-565X
Y1 - 2009
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A0820789

We propose a novel kind of compound permanent magnet synchronous machine (CPMSM), which is applicable in low-speed and high-torque situations. We first explain the structure of the CPMSM. Based on theoretically deducing the calculation formulae of the CPMSM electromagnetic parameters, we analyze the operating characteristics of the CPMSM, and obtain the power-angle curves and working curves. The no-load magnetic field distribution and the cogging torque are analyzed by applying the finite element method of three-dimensional (3D) magnetic fields, to determine the no-load leakage coefficient and the waveform of the cogging torque. Furthermore, the optimal parameters of the permanent magnet for reducing the cogging torque are determined. An important application target of the CPMSM is in direct-drive pumping units. We have installed and tested a direct-drive pumping unit in an existing oil well. Test results show that the power consumption of the direct-drive pumping unit driven by CPMSM is 61.1% of that of the beam-pumping unit, and that the floor space and weight are only 50% of those of a beam-pumping unit. The noise output does not exceed 58 dB in a range of 1 m around the machine when the machine is 1.5 m from the ground.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


[1] Aydin, M., Huang, S., Lipo, T.A., 2001. Optimum Design and 3-D Finite Element Analysis of Non-slotted and Slotted Internal Rotor Type Axial Flux PM Disc Machines. Proc. IEEE-PES Summer Meeting, Canada, p.1409-1416.

[2] Aydin, M., Huang, S., Lipo, T.A., 2006. Torque quality and comparison of internal and external rotor axial flux surface-magnet disc machines. IEEE Trans. Ind. Electron., 53(3):822-830.

[3] Bai, L.P., Zhang, S.Z., 2007. Field testing method study of operational efficiency for pumping unit motors. China Petrol. Mach., 35(4):64-66 (in Chinese).

[4] Bianchi, N., Bolognani, S., 2002. Design techniques for reducing the cogging torque in surface-mounted PM motors. IEEE Trans. Ind. Appl., 38(5):1259-1265.

[5] Chen, Y.S., Zhu, Z.Q., Howe, D., 2005. Calculation of d- and q-axis inductances of PM brushless ac machines accounting for skew. IEEE Trans. Magn., 41(10):3940-3942.

[6] Dou, M.F., Liu, W.G., 2004. On design high-efficiency and energy-saving REPMSM (rare earth permanent magnet synchronous motor) for use in Chinese oil fields. J. Northwestern Polytech. Univ., 22(3):355-359 (in Chinese).

[7] Gieras, J.F., 2004. Analytical approach to cogging torque calculation of PM brushless motors. IEEE Trans. Ind. Appl., 40(5):1310-1316.

[8] Gieras, J.F., Wing, M., 1997. Permanent Magnet Motor Technology. Marcel Dekker, Inc., New York, USA, p.85-105.

[9] Howe, D., Zhu, Z.Q., 1992. Magnetic Field Analysis of Permanent Magnet Machines. Proc. 12th Int. Workshop on Rare-earth Magnets and Their Applications, p.308-337.

[10] Huang, M.X., Fan, C.Z., Ye, Y.Y., 2007. Design and analysis of the novel compound permanent magnet synchronous motor. Electr. Mach. Control Appl., 34(10):1-4, 26 (in Chinese).

[11] Lateb, R., Takorabet, N., Meibody, F.T., 2006. Effect of magnet segmentation on the cogging torque in surface-mounted permanent-magnet motors. IEEE Trans. Magn., 42(3):442-445.

[12] Li, L.Y., Cui, S.M., Zheng, P., Guo, X.C., Cheng, S.K., Wang, Y., 2001. Experimental study on a novel linear electro-magnetic pumping unit. IEEE Trans. Magn., 37(1):219-222.

[13] Qu, R.H., Lipo, T.A., 2002. Analysis and Modeling of Airgap & Zigzag Leakage Fluxes in a Surface-Mounted-PM Machine. Proc. 37th IAS Annual Meeting, p.2507-2513.

[14] Rieder, U.H., Schroedl, M., 2005. A Simulation Method for Analyzing Saliencies with Respect to Enhanced Inform-capability for Sensorless Control of PM Motors in the Low Speed Range Including Standstill. European Conf. on Power Electronics and Applications. CD-ROM.

[15] Tang, R.Y., 1997. Modern Permanent Magnet Machines— Theory and Design. China Machine Press, Beijing, China, p.37-61 (in Chinese).

[16] Yang, Y.B., Wang, X.H., Zhang, R., Ding, T.T., Tang, R.Y., 2006. The optimization of pole arc coefficient to reduce cogging torque in surface-mounted permanent magnet motors. IEEE Trans. Magn., 42(4):1135-1138.

[17] Yu, F.P., Liu, X.Q., Gao, Z.Y., Chen, X.W., Jiao, T.J., Yang, N., 2005. Energy-saving effect test and analysis of permanent magnet motor in the pumping unit. Oil Field Equip., 34(1):83-85 (in Chinese).

Open peer comments: Debate/Discuss/Question/Opinion



2010-01-29 11:54:27

According to authors, this is their first article published in English on this new motor.

Please provide your name, email address and a comment

Journal of Zhejiang University-SCIENCE, 38 Zheda Road, Hangzhou 310027, China
Tel: +86-571-87952783; E-mail: cjzhang@zju.edu.cn
Copyright © 2000 - 2024 Journal of Zhejiang University-SCIENCE