Cogging Torque Mitigation of Modular Permanent Magnet Machines

被引：17
|
作者：
Li, G. J. [1 ]
Ren, B. [1 ]
Zhu, Z. Q. [1 ]
Li, Y. X. [1 ]
Ma, J. [1 ]
机构：
[1] Univ Sheffield, Sheffield S10 2TN, S Yorkshire, England
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2016年 / 52卷 / 01期
关键词：
Cogging torque; modular machine; permanent magnet (PM); slot-opening (SOs) shift; torque ripple; REDUCTION; DESIGN; OPTIMIZATION; MOTORS; SHAPE;
D O I：
10.1109/TMAG.2015.2477489
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper proposes a novel cogging torque mitigation method for modular permanent magnet (PM) machines with flux gaps in alternate stator teeth. The slot openings (SOs) of the modular PM machines are divided into two groups in a special way. By shifting the SOs of two groups in opposite directions with the same angle, the machine cogging torque can be significantly reduced. An analytical formula of the desired shift angle is derived, and can be applicable to other modular machines with different slot/pole number combinations. Meanwhile, the influence of the proposed method on phase back electromotive force (EMF) is investigated, and the three-phaseback EMF waveforms remain balanced for all slot/pole number combinations after slot shifting. Experiments based on the existing prototypes are carried out to validate the finite-element modeling.
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页数：10
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