无轴承开关磁阻电机凸极转子封盖优化设计

Optimal design of the shrouds for salient pole rotor of bearingless switched reluctance motor

针对无轴承开关磁阻电机(BSRM)凸极转子封盖优化设计问题,通过划分不同封盖尺寸的BSRM凸极转子网格,采用计算流体动力学(CFD)法求解了相应的3D气隙流场与风摩转矩,结合所求解的不同封盖转子端面对流换热热阻,通过拟合曲线获得了优化的BSRM凸极转子封盖尺寸,实现了降低风摩转矩与端部对流热阻的折衷,在降低风摩损耗的同时提高了转子对流换热性能。

Aiming at the optimal design of the shroud for the salient pole rotor of bearingless switched reluctance motor(BSRM),the mesh of the shroud with different dimensions is divided.The computational fluid dynamics(CFD)is used to solve the 3D fluid field of air-gap and the windage torque.Combined with the solved convection thermal resistance at the end of the rotor,the fitting curves are used to obtain the optimized dimension of the shroud for the salient pole rotor of BSRM.The tradeoff between the reduction of windage torque and convection thermal resistance at the end of the rotor is realized.The windage loss is reduced and the convection performance of rotor is enhanced simultaneously.