A Linear-Rotary Permanent Magnet Actuator With Independent Magnetic Circuit Structure
A Linear-Rotary Permanent Magnet Actuator With Independent Magnetic Circuit Structure
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DOI：
10.1109/tasc.2016.2603005
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发表时间：
2016-10
影响因子：
1.8
通讯作者：
K. Guo;S. Fang;Heyun Lin;Yunkai Huang;Yang Zhang;Hui Yang
中科院分区：
文献类型：
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作者：
K. Guo;S. Fang;Heyun Lin;Yunkai Huang;Yang Zhang;Hui Yang
提出了一种新型的直线旋转永磁操动机构，该机构具有独立的磁路结构，减小了相邻相磁通之间的耦合关系。通过选择合适的定子节段间距，可以减小齿槽力的幅值，同时增大推力。建立了气隙磁密的三维模型，并建立了一个简化的截面模型，用于计算推力。采用解析法和麦克斯韦应力张量法推导了齿槽力、端部力和法向力的表达式。有限元分析结果表明，当定子轴向间距接近2τ/3时，磁阻力最小。
The paper proposes a novel linear-rotary permanent magnet actuator with an independent magnetic circuit structure, which decreases the coupling relationship between the fluxes of adjacent phases. The amplitude of cogging force is reduced by choosing proper distance between adjacent stator segments in the axial direction, while the thrust force can be increased. A 3-D model is built for analyzing the air gap magnetic flux density and a simplified model of one section is built for calculating thrust force. The expression of cogging force, end force, normal force are derived by analytic method and Maxwell stress tensor method. The analytic results verified by finite element method show that the detent force can be minimized when the distance between two adjacent stators in axial direction approaches 2τ/3.