A Novel Method of Weakening the Cogging Torque of Modular Permanent Magnet Motor

doi:10.11985/2017.02.003

Abstract

Abstract:

A new structure of stator combing the slot opening shift of the permanent magnet motor is discussed in the paper in order to reduce the cogging torque of modular permanent magnet motor. The generated cogging torque components are shifted also to the right and to the left due to the mechanical displacement of stator slot opening. Therefore, for an appropriate shifting angle, the cogging torque components for the one-half and the second half can be shifted by 180°, and the cogging torque components can be mutually offset, then the total cogging torque can be reduced. By the method of regarding the total cogging torque of one motor as the addictive cogging torque of two motors, the expression of slot opening shift has been given. The experimental simulation shows that the method can effectively weaken the cogging torque of modular permanent magnet motor, and can keep the torque ripple under the 2% of the rated torque.

Key words: Modular permanent magnet motor, slot-opening shift, cogging torque, torque ripple, finite element analysis

CLC Number:

TM464
V44

Libing Jing,Lin Liu,Qixing Gao,Zhenghao Luo. A Novel Method of Weakening the Cogging Torque of Modular Permanent Magnet Motor[J]. Journal of Electrical Engineering, 2017, 12(2): 15-19.

Figures/Tables 11

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Tab

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References 13

[1]	Li G J, Ren B, Zhu Z Q . Cogging torque mitigation of modular permanent magnet machines[J]. IEEE Transactions on Magnetics, 2016,52(1):3238-3247.
[2]	张炳义, 贾宇琪, 冯桂宏 . 新型模块组合式定子永磁电机[J]. 电工技术学报, 2015,30(12):243-252.
	Zhang Bingyi, Jia Yuqi, Feng Guihong . Novel permanent magnet synchronous machines with modules combination stator[J]. Transactions of China Electrotechnical Society, 2015,30(12):243-252.
[3]	Islam R, Husain I, Fardoun A , et al. Permanent magnet synchronous motor magnet designs with skewing for torque ripple and cogging torque reduction[J]. IEEE Transactions on Industry Applications, 2009,45(1):152-160.
[4]	Zhu Ziqiang, Howe D . Influence of design parameters on cogging torque in permanent magnet machines[J]. IEEE Transactions on Energy Conversion, 2000,15(4):407-412.
[5]	刘婷, 欧阳红林, 黄守道 . 基于重复单元削弱永磁风力发电机齿槽转矩[J]. 电工技术学报, 2011,26(12):43-48.
	Liu Ting, Ouyang Honglin, Huang Shoudao . Reducing cogging torque in permanent magnet wind power generators based on unit[J]. Transactions of China Electrotechnical Society, 2011,26(12):43-48.
[6]	Zhu Li, Jiang Suzhe, Zhu Ziqiang . Analytical methods for minimizing cogging torque in permanent-magnet machines[J]. IEEE Transactions on Magnetics, 2009,45(4):2023-2030.
[7]	Zhu Ziqiang, Howe D . Influence of design parameters on cogging torque in permanent magnetmachines[J]. IEEE Transactions on Energy Conversion, 2000,15(4):407-412.
[8]	Yang Yubo, Wang Xiuhe, Zhang R . The optimization of pole arc coefficient to reduce cogging torque in surface-mounted permanent magnet motors[J]. IEEE Transactions on Magnetics, 2006,42(4):1135-1138.
[9]	Jiang Xinting, Xing Xiuwan, Ling Yin . Theoretical and simulation analysis of influences of stator tooth width on cogging torque of BLDC motors[J]. IEEE Transactions on Magnetics, 2009,45(10):4601-4604.
[10]	Lateb R, Takorabet N, Meibody T F . Effect of magnet segmentation on the cogging torque in surface-mounted permanent-magnet motors[J]. IEEE Transactions on Magnetics, 2006,42(3):442-445.
[11]	Zhu Ziqiang, Ishak D . Analysis of cogging torque in brushless machines having non-uniformly distributed stator slots and stepped rotor magnets[J]. IEEE Transactions on Magnetics, 2005,41(10):3910-3912.
[12]	Zhu Ziqiang, Howe D . Synjournal of cogging-torque waveform from analysis of a single stator slot[J]. IEEE Transactions on Industry Applications, 2006,42(3):650-657.
[13]	杨玉波, 王秀和, 张鑫 . 磁极偏移削弱永磁电机齿槽转矩方法[J]. 电工技术学报, 2006,21(10):22-25.
	Yang Yubo, Wang Xiuhe, Zhang Xin . Cogging torque reduction method of magnet shifting in permanent magnet motors[J]. Transactions of China Electrotechnical Society, 2006,21(10):22-25.

参数	数值
永磁体内径/mm	63
永磁体外径/mm	75
定子内径/mm	77
定子外径/mm	140
气隙/mm	1
铁心轴长/mm	65
极对数p	5
槽数N	12
剩磁B_r/T	1.2
负载电流I_f/A	100
额定转矩T /Nm	12
转速n /rpm	1 000

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