摘要
永磁直线电机由磁阵列构成的动子和线圈构成的定子组成。其中,磁阵列多采用Halbach永磁阵列。直线电机的运行稳定性与永磁体的气隙磁场的分布情况有直接联系。因此,改善气隙磁场的正弦分布是改善直线电机工作特性的关键。本文提出了改进的Halbach永磁阵列,每个磁块的形状为凸型。论文对其磁场的分布特性进行了理论分析,利用有限元方法对改进的Halbach永磁阵列的磁场进行了仿真,并且和普通矩形的Halbach永磁阵列磁场进行了比较。仿真实验表明,凸型磁块构成的磁阵列可大大改善气隙磁场的正弦特性,而且一定程度上提高了其磁场强度。
The permanent magnet linear motor consists of the mover which is constituted by magnetic arrays and the stator which is constituted by coil. The running stability of linear motor is directly linked to the distribution of the air-gap magnetic field of the permanent magnet. Therefore, to improve the air sinusoidal magnetic field distribution is the key to improving the operating characteristics of the linear motor. This paper proposed an improved Halbach permanent magnet arrays, the shape of each magnet is convex. Thesis did theoretical analysis of distribution characteristics of the magnetic, used the finite element method to simulate magnetic field of the improved Halbach permanent magnet array and compared it with the magnetic field of general rectangular Halbach permanent magnet arrays. Simulation results show that magnetic array consisting of convex magnetic blocks can greatly improve the sinusoidal magnetic field characteristics of the air gap, and to a certain extent, improved the strength of its magnetic field.
出处
《微电机》
2015年第5期25-28,共4页
Micromotors
基金
国家自然科学基金(51375052)
关键词
永磁直线电机
气隙磁场
凸型
Halbach永磁阵列
permanent magnet linear motor
air-gap magnetic field
convex
Halbach permanent magnet array
