双轴直线电机模组水冷结构优化设计

Optimization Design of Water-cooling Structure for Dual-axis Linear Motor Module

中文关键词: 直线电机  水冷板  有限元  换热性能

英文关键词: linear motor  water-cooling plate  finite element  heat transfer performance

中文摘要:

      文中针对双轴直线电机模组长时间工作后绕组温升过高的问题，研究水冷板管道截面形状对降温效果的影响。经公式推导计算，获得绕组等效导热系数、比热容、密度以及动子表面对流换热系数。通过建立有限元模型，经电磁场–温度场耦合计算，绕组最高稳态温度为105.66 ℃，最低稳态温度为74.524 ℃。加装管道截面形状为圆形、正方形、矩形及正三角形的水冷板后，经电磁场–流体场耦合计算，对应绕组最高温度分别为43.328 ℃，43.833 ℃，43.951 ℃及43.216 ℃。其中，圆形管道与正三角形管道的绕组最高温度温升曲线相似，正方形管道与矩形管道的绕组最高温度温升曲线相似。引入综合换热性能指数作为评价指标，以圆形管道水冷板的换热效率和流动阻力作为基准，计算得出其余形状管道综合换热性能指数均小于1。以最高温度为评价标准，正三角形管道水冷板的降温效果最好，而圆形管道水冷板的综合换热性能最好。

英文摘要:

      To address the issue of excessive temperature rise in the windings of dual-axis linear motor modules after prolonged operation, the impact of the water-cooling plate’s conduit cross-sectional shape on cooling performance is studied in this paper. Through formula derivation and calculation, the equivalent thermal conductivity, specific heat capacity and density of the windings, as well as the convective heat transfer coefficient of the rotor surface, are obtained. By establishing a finite element model and performing electromagnetic-thermal field coupling calculations, the highest steady-state temperature of the windings is found to be 105.66 ℃, and the lowest steady-state temperature is 74.524 ℃. After installing water-cooling plates with conduit cross-sectional shapes of circular, square, rectangular and equilateral triangular, the highest winding temperatures obtained from electromagnetic-fluid field coupling calculations are 43.328 ℃, 43.833 ℃, 43.951 ℃ and 43.216 ℃ respectively. Among these, the temperature rise curves for the circular and equilateral triangular conduits are similar, as are those for the square and rectangular conduits. Introducing a comprehensive heat transfer performance index as an evaluation metric, and using the heat transfer efficiency and flow resistance of the circular conduit water-cooling plate as a baseline, it is found that the comprehensive heat transfer performance indices for the other conduit shapes are less than 1. Therefore, based on the highest temperature, the equilateral triangular conduit water-cooling plate demonstrates the best cooling effect, while the circular conduit water-cooling plate shows the best overall heat transfer performance.