永磁电机退磁电流的仿真与测试

受外磁场、温度场、化学反应、机械振动等因素的影响,永磁电机在运输或工作过程中可能发生不可逆退磁.论文以样机为例,通过有限元的计算和分析,给出了电机退磁电流的计算方法,仿真结果可以以图表或图形等多种方式给出,直观、简洁、易于理解.另外论文还介绍了一种退磁电流的测试方法,结合磁场的有限元分析对永磁电机的退磁电流进行分析,通过验证试验结果与有限元分析非常吻合.为了保证电机在生命周期内的正常运转,在电机设计时应保证永磁体在最严酷的工作环境中各部分的最大去磁工作点应高于拐点位置.

Demagnetization Current Simulation and Test for Permanent Magnet Motor

As we know, the permanent magnet motor may occur irreversible demagnetization when transporting or operating affected by ex- ternal magnetic field, temperature field, chemical reaction, mechanical vibration and other factors. In this paper, take prototype for example, designs a motor demagnetization current calculation method by finite element calculation and analysis, the simulation results can be showed by a variety of ways such as chart or graph. It is intuitive, simple and easy to understand. Moreover, this article also describes a demagnetization current testing method, combine with the finite dement analysis method to analysis the demagnetization current of permanent magnet motor, found the testing result are very consistent with simulation result. In order to ensure the normal operation of the motor in the life cycle, the motor should be designed to ensure when the permanent magnets are working in the harshest work environment, the maximum demagnetization operating point of each part should be higher than the inflection point position.