Spoke永磁同步电机多物理场设计研究

Research on Multi-physical Field Design of Spoke Permanent Magnet Synchronous Motor

本文建立了Spoke永磁同步电机电磁-机械-温度场多物理场有限元模型,完成了方案设计和性能分析。首先采用等效方式考虑横向边端效应建立了快速的二维电磁模型,设计了转子铁心一体式结构并进行了优化,仿真得到电磁性能和额定工况损耗;然后建立三维转子机械强度分析模型,在加大负荷条件下仿真计算了转子应力和形变;其次研究了绕组及绝缘的等效处理方法,建立Fluent温度场模型,以电磁模型中的损耗作为热源,仿真模拟了电机额定工况下的动态温升;最后制作了样机并进行了电磁性能和温升试验,验证了多物理场有限元模型与设计方案的准确性。

The electromagnetic-mechanical-thermal multi-physical field finite element model of Spoke permanent magnet synchronous motor was established in this paper,and then the scheme design and performance analysis were completed.First,a two-dimensional electromagnetic model was established by considering the transverse effect with equivalent method,the integrated iron core of rotor structure was designed and optimized,and then the electromagnetic performance and the loss of rated condition were obtained by simulation.Second,based on the established three-dimensional mechanical strength analysis model of the rotor,the stress and deformation were calculated and simulated under enlarged load condition.Third,a thermal model was established by Fluent after the equivalent method of winding and insulation were investigated,and then the dynamic temperature rise of the motor at rated condition was simulated with the loss as the heat source,which was calculated in former electromagnetic model.Finally,a prototype was made and its electromagnetic and thermal performance were tested.The multi physical field finite element models and design scheme were validated.