A new primary permanent magnet linear motor for urban rail transit
A new primary permanent magnet linear motor for urban rail transit
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DOI：
10.11142/jicems.2012.1.1.054
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发表时间：
2010-12
期刊：
影响因子：
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通讯作者：
R. Cao;M. Cheng;W. Hua;Wenxiang Zhao;Yi Du
中科院分区：
文献类型：
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作者：
R. Cao;M. Cheng;W. Hua;Wenxiang Zhao;Yi Du
提出了一种新型的永磁直线电机，它将永磁体和电枢绕组都放在短动子中，而长定子仅由铁芯组成。因此，这种新型永磁直线电机可以称为初级永磁直线电机，它具有结构简单、成本低、效率高、功率因数高、推力密度大等优点，特别适合于城市轨道交通等长定子应用。首先介绍了其拓扑结构和工作原理。然后，研究了电机的静态特性，包括磁场分布、磁链、反电势、相电感和推力。此外，还采用了斜齿技术来提高电机的电磁性能。最后，用有限元法对理论分析结果进行了验证。
In this paper, a new permanent magnet (PM) linear motor is proposed, in which both the magnets and armature windings are placed in the short mover, while the long stator consists of iron core only. Hence, this new PM linear motor can be called as primary permanent magnet linear motor, which exhibits the advantages of robust and simple mover, low cost, high efficiency, high power factor, and high thrust force density, especially suitable for the long stator application such as urban rail transit. Its topology structure and operation principle are introduced firstly. Then, the static characteristics are investigated, including field distributions, flux-linkage, back-EMF, phase inductance and thrust force. In addition, the technique of skewing stator teeth is adopted to improve the electromagnetic performance. Finally, finite element method (FEM) is used to verify the theoretical analysis results.