一种永磁直线电机的永磁体阵列设计  

Design of Magnet Arrays for a Permanent Magnetic Linear Motor

作　　者：毛军红[1] 罗俊航[1] 姜强[1] 谢友柏[1] 

机构地区：[1]西安交通大学机械工程学院,西安710049

出　　处：《西安交通大学学报》2007年第3期353-357,共5页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(50475083)

摘　　要：针对一种无铁心单边永磁直线电机的结构形式,推导了工作气隙磁场的二维解析解,用于电机阵列类型、永磁体厚度和永磁体占空比等结构参数的设计.解析计算表明,在该直线电机结构形式下,永磁体阵列采用常规阵列就可以得到与分段Halbach阵列接近的磁场,使电机的加工与装配得以简化,这与ANSYS有限元计算结果一致.该分析直线电机磁场的方法仅需修改边界条件,就可用于铁心直线电机的设计.基于文中的分析,实现了一个直线电机驱动的单自由度工作台,其行程为27 mm,移动件的质量为1.4 kg,最大加速度为11.5 m/s2.An iron-less single side permanent magnetic linear motor structure is presented, and two-dimensional analytical formulae for its magnet field are deduced to design the types of magnet arrays, thickness of permanent magnet, and duty ratio of magnet arrays, etc. With the certain design parameters, a conventional array comes into use instead of a piecewise Halbach arrays, and the machining and assemblage of the motor are greatly simplified, The calculation results are in accordance with that of ANSYS. The analytical formulae can be used in design of a cored linear motor by modifying boundary conditions. A linear motor driven bench with single degree of freedom is realized, where the travel reaches to 27 mm, mass of the moving parts 1.4 kg, and maximum acceleration 11.5 m/s^2.

关 键 词：直线电机 永磁体阵列 参数设计 

分 类 号：TM359[电气工程—电机]