3-D Magnetic Field and Torque Analysis of a Novel Halbach Array Permanent-Magnet Spherical Motor

被引：69
作者：
Xia, Changliang [1 ]
Li, Hongfeng [1 ]
Shi, Tingna [1 ]
机构：
[1] Tianjin Univ, Sch Elect Engn & Automat, Tianjin 300072, Peoples R China
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2008年 / 44卷 / 08期
基金：
中国国家自然科学基金;
关键词：
FEM; Halbach array PM spherical motor; parasitic effect; pole-arc coefficient;
D O I：
10.1109/TMAG.2008.922782
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：
We present a three-dimensional (3-D) torque model based on spherical harmonic functions of a Halbach array permanent-magnet (PM) spherical motor. Using the torque model, we show how to realize three-degree-of-freedom motion. We compare the Halbach array PM spherical motor and the conventional parallel magnet array spherical motor in terms of spherical harmonic component and amplitude of the torque. We discuss our study of variations of air-gap magnetic field with parallel magnetization directions along different spatial positions in each magnet segment. We also discuss the parasitic effect of the proposed spherical Halbach array magnet. We have verified our results by finite-element method.
引用
收藏
页码：2016 / 2020
页数：5
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