基于正交设计试验的永磁同步牵引电机散热的数值模拟研究

Numerical Simulation on Heat Dissipation of Permanent Magnet Synchronous Traction Motor Based on Taguchi′s Orthogonal Design Experiment

基于Taguchi正交设计试验,以定子绕组最高温度为试验指标,采用数值模拟方法分析了机座的散热筋参数对电机散热性能的影响。通过极差分析,发现影响定子绕组最高温度的各因素主次顺序依次为,散热筋高度、散热筋间距、散热筋宽度。综合考虑材料成本和电机减重要求,得到最佳的水平组合方式为散热筋高度30 mm、散热筋宽度4 mm、散热筋间距20 mm。

Based on the Taguchi’s orthogonal design experiment, taking the maximum temperature of the stator winding as the experimental index, the influence of the parameters of the cooling ribs on the heat dissipation performance of the motor is analyzed by the numerical simulation. Through the range analysis, it is found that the order of the factors affecting the maximum temperature of the stator winding is, the height of the cooling ribs, the spacing of the cooling ribs, and the width of the cooling ribs. Considering the material cost and the weight reduction requirements of the motor, the best level combination is obtained as the height of the cooling rib is 30 mm, the width of the cooling rib is 4 mm, and the spacing of the cooling rib is 20 mm.