Abstract：To satisfy the requirement of the low speed high torque permanent magnet synchronous motor(PMSM) used in the numerical control(NC) table, the similar pole and slot number multipolar PMSM with unequal teeth tips width and alternate winding is researched and designed in this paper. This kind of motors can operate with lower speed. The structure of similar pole and slot number can increase the winding pitch coefficient, and reduce its inherent cogging torque ripple effectively. And the unequal teeth tips width and alternate winding structure optimize the stator teeth flux linkage and winding coefficient, as a result, the torque density is increased. Furthermore, the influences of unequal teeth tips width structure on the cogging torque ripple and harmonic winding coefficient are analyzed. The finite element method software ANSYS and experiment are employed to analyze the proposed motor. The results prove that the cogging torque ripple of the proposed motor is less than 1% of its rated torque, and the unequal teeth structure can increase the average torque compared with the equal teeth one. Therefore, these results prove that the design method in the paper is correct and effective.
董婷, 黄伟, 王成元. 不等齿顶宽间隔绕组对直接驱动转台电机转矩特性的影响[J]. 电工技术学报, 2010, 25(8): 12-17.
Dong Ting, Huang Wei, Wang Chengyuan. Influence of Unequal Teeth Tips Width and Alternate Winding on Torque Characteristics in Direct Drive Table Motor. Transactions of China Electrotechnical Society, 2010, 25(8): 12-17.
[1] Kano Y, Matsui N. A design approach for direct-drive permanent-magnet motors[J]. IEEE Transactions on Industry Applications, 2008, 44(2): 543-554. [2] 沈捷. 直接驱动技术的新进展[J]. 欧洲生产工程, 2005, 2(1): 102-104. [3] 黄海宏, 王海欣. 多极永磁同步电动机的研究[J]. 电气应用, 2005, 24(1): 89-91. [4] Fujishiro S, Ishikawa K, Kikuchi S, et al. Design of outer-rotor-type multipolar switched reluctance motor for electric vehicle[J]. Journal of Applied Physics, 2006, 99(8): 324-326. [5] Ando K, Yamada A, Miki I, et al. Study on improvement of efficiency for outer rotor type of interior permanent magnet synchronous motor[C]. International Symposium on Power Electronics, Electrical Drives, Automation and Motion, 2008: 599-602. [6] 谭建成. 三相无刷直流电动机分数槽集中绕组槽极数组合规律研究[J]. 微电机, 2008, 41(4): 64-68. [7] Štumberger B, Štumberger G, Hadziselimovic M, et al. High-performance permanent magnet brushless motors with balanced concentrated windings and similar slot and pole numbers[J]. Journal of Magnetism and Magnetic Materials, 2006, 304(2): e829-e831. [8] 黄先进. 采用集中绕组和高强度冷却的高转矩密度永磁电机[J]. 电力电子, 2008(1): 17-21. [9] 陈金涛, 辜承林. 新型横向磁通永磁电机研究[J]. 中国电机工程学报, 2005, 25(15): 155-160. [10] Ishak D, Zhu Z Q, Howe D. Permanent-magnet brushless machines with unequal tooth widths and similar slot and pole numbers[J]. IEEE Transactions on Industry Applications, 2005, 41(2): 584-590. [11] Zhu Z Q, Howe D. Influnce of design parameters on cogging torque in permanent magnet machines[J]. IEE Transactions on Energy Conversion, 2000, 15(4): 407-412. [12] Florence Libert. Design, optimization and comparison of permanent magnet motors for a low-speed direct driven mixer[D]. Stockholm: Royal of Institute of Technology, 2004. [13] 陈世坤. 电机设计[M]. 北京: 机械工业出版社, 2000. [14] Hwang S M, Eom J B, Jung Y H, et al. Various design techniques to reduce cogging torque by controlling energy variation in permanent magnet motors[J]. IEEE Transactions on Magnetics, 2001, 37(4): 2806-2809. [15] Mohammad S Islam, Mir S, Sebastian T. Issues in reducing the cogging torque of mass-produced permanent magnet brushless DC motor[J]. IEEE Transactions on Industry Applications, 2004, 40(3): 813-820.
2010, Vol. 25 
