真空干泵用定子拼装式永磁电机性能分析与实验

Performance analysis and experiment of stator assembled permanent magnet motor for vacuum dry pump

针对小型真空干泵用永磁电机下线困难的工程问题,提出一种采用模块化定子结构方法,将定子形式由整体式变为拼装式,并以9槽6极表贴式永磁同步电机为研究对象,采用有限元法选取抑制拼装式电机齿槽转矩和转矩脉动的的最优槽口,引入整体式电机进行对比,建立拼装式与整体式电机的二维模型,并进行电磁场与温度场仿真,综合分析拼装式与整体式电机的性能差异,结果表明拼装式电机的齿槽转矩、气隙磁密谐波含量和温升等都优于整体式电机。研制拼装式电机的样机并进行电机性能实验,得到了电机的性能数据。实验结果与仿真结果一致,进一步验证了拼装式电机的可行性,为新产品批量生产提供了科学依据。

Aiming at the problem of small-scale vacuum dry pump permanent magnet motors going offline,a modular stator structure method is proposed to change the stator form from monolithic to assembled,and a 9-slot 6-pole surface-mounted permanent magnet synchronous motor is chosen as the research object.The optimal slot for suppressing cogging torque and torque ripple of the assembled motor was selected by the finite element method,and the integrated motor was introduced for comparison. A two-dimensional model of the assembled and integrated motor was established,and the electromagnetic field was performed. With the temperature field simulation,comprehensive analysis of the performance difference of the assembled and integrated motors,the results show that the cogging torque,air gap magnetic flux harmonic content and temperature rise of the assembled motor are better than the integrated motor. The prototype of the assembled motor was developed and the motor performance experiments were performed to obtain the performance data of the motor. The experimental results are consistent with the simulation results,further verifying the feasibility of the assembled motor,and providing a scientific basis for mass production of new products.