永磁电机气隙磁场分析与磁钢选择

The Analysis of Air Gap Magnetic Field of Permanent Magnetic Motor and Selecting Magnetic Steel of Permanent Magnetic Motor

在永磁电机的设计中 ,为了求出电机的稳态和暂态特性 ,需要计算电机的磁参数。近年电机界尚存在不同的方法计算磁场问题 ,作为另一种途径 ,文中直接从场的角度出发 ,运用永磁镜象原理 ,结合电机基本结构 ,分析了永磁电机气隙磁场的大小及分布 ,给出了气隙磁场的解析表达式 ,进而探讨永磁电机磁钢材料及厚度的选择方法。

Magnetic index of permanent magnetic motor should be calculated to find the feature of stabling and transient of the motor. In recent years people,who are working in the domain of motor have taken different way to research magnetic field. From the angle of magnetic field directly, this paper analyses the size and spread of air gap magnetic field of motors and gives the analytic formulation by the use of principal of permanent magnetic mirror. The paper also makes a method for selecting material and thickness of magnetic steel of permanent magnetic motors.