真空干泵用横向磁通开关磁阻电机对比分析

Comparative Analysis of Transverse Flux Switched Reluctance Motor for Vacuum Dry Pump

为了解决真空泵用电机工作在真空环境中,转子不易散热的问题,需要严格控制真空泵用电机的温升,从而提高系统运行的稳定性。开关磁阻电机(SRM)转子无绕组,转子损耗较小,整体温升较低,对于提升真空泵用驱动电机的性能具有重要意义。在传统SRM的基础上,设计了一款真空泵用横向磁通SRM,由于定子绕组空间较大,有利于电机散热,进一步减少了定子的损耗,从而降低了电机的整体温升。最后,对同功率、同体积的异步电机、径向SRM和横向磁通SRM进行了温度场、轴承的热应力和热形变的对比分析。结果表明,横向磁通SRM的温升、轴承的热应力和热形变均最小,说明横向磁通SRM作为真空泵用驱动电机的可行性。

In order to solve the problem that the vacuum pump motor rotor is difficult to dissipate heat in a vacuum environment,it is necessary to strictly control the temperature rise of the vacuum pump motor to improve the stability of the system operation.The rotor of switched reluctance motor(SRM)has no windings,the rotor loss is small,and the overall temperature rise is low,which is of great significance to improve the performance of the drive motor for vacuum pumps.On the basis of the traditional SRM,a transverse flux SRM for vacuum pumps is designed.Due to the large space of stator winding,it is conducive to the heat dissipation of the motor,and further reduces the loss of the stator,thereby reducing the overall temperature rise of the motor.Finally,the temperature field,thermal stress and thermal deformation of the bearing of the induction motor,radial SRM and transverse flux SRM with the same power and volume are compared and analyzed.The results show that the temperature rise,thermal stress and thermal deformation of the bearing of the transverse flux SRM are minimum,which indicates the feasibility of the transverse flux SRM as the driving motor for vacuum pump.