摘要
Halbach阵列永磁电机与常规磁体结构电机相比,具有更接近正弦的气隙磁密分布、更大的气隙磁通及良好的自屏蔽作用等特性。因此,Halbach阵列永磁电机具有效率高、体积小、重量轻等优点。本文提出一种Halbach阵列永磁球形电动机,介绍了其基本结构和工作原理,并给出了转子磁极的Halbach阵列充磁规律。以转子4极、每极3块Halbach阵列磁体结构为例,对其磁场进行了分析,得出了磁场三维解析模型,并对磁场沿球坐标?和θ两个方向的谐波含量进行了研究。最后采用有限元方法对磁场进行了分析。
Halbach array magnetized rotor offers a number of attractive features. For example, the Halbach array airgap field distribution is inherently sinusoidal; the magnet has a higher working point which can increase the power density; due to the self-shielding magnetization, rotor back-iron is not essential so that the mass and inertia can be reduced. Resulting from the above merits, Halbach array motors are developed for various application. In this paper, the fundamental principle of Halbach array PM spherical motor is demonstrated. By using the Laplace equation and correct boundary conditions, the magnetic field is formulated. Harmonic component of magnetic field along φ and θ direction is studied. In order to validate the analytic method, magnetic field analysis with FEM is offered.
出处
《电工技术学报》
EI
CSCD
北大核心
2007年第7期126-130,共5页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(50577045)
