A Novel Linear-Rotary Permanent-Magnet Actuator Using Interlaced Poles

被引：11
|
作者：
Guo, Kaikai [1 ]
Fang, Shuhua [1 ]
Yang, Hui [1 ]
Lin, Heyun [1 ]
Ho, S. L. [2 ]
机构：
[1] Southeast Univ, Sch Elect Engn, Nanjing 210096, Jiangsu, Peoples R China
[2] Hong Kong Polytech Univ, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R China
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2015年 / 51卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Air-gap magnetic field; interlaced poles; linear cogging force; linear-rotary permanent-magnet actuator (LRPMA); rotary cogging torque; Schwarz-Christoffel transformation (SCT); GEAR;
D O I：
10.1109/TMAG.2015.2445924
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 linear-rotary permanent-magnet actuator (LRPMA) with interlaced poles, which has the merit of using only 50% of the neodymium-iron-boron permanent magnets when compared with those used in traditional Halbach structure. By assuming the stator is slotless, the magnetic field distribution of the LRPMA is initially analyzed using the magnetic scalar potential in the Cartesian coordinate system. A method for calculating the relative permeance by Schwarz-Christoffel transformation (SCT) is subsequently deduced to analyze the magnetic field in detail and predict the cogging force/torque of LRPMA very accurately. The analytical linear cogging force and rotary cogging torque are derived and verified for the design optimization of the actuator. The 3-D finite-element method is used to verify the correctness and effectiveness of the proposed SCT.
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页数：4
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