混合励磁磁通切换直线磁悬浮电动机的温升特性分析

针对混合励磁磁通切换直线磁悬浮电动机(HEFSLMSM)的特殊结构，深入分析不同工况下的温升特性。研究HEFSLMSM的结构及其运行原理，建立三维稳态温度场数学模型和边界条件方程。考虑电动机各部分热交换的情况，确定各材料的导热系数以及电动机不同部分的对流换热系数。通过有限元方法计算电动机的铜耗与铁耗，并求出相应的生成热。在有限元软件中计算出自然散热情况下空载及负载时的温度变化。在原模型的基础上进行冷却系统的设计，分别计算安装冷却装置后不同工况下的温度场分布。通过自然风冷和强制水冷条件下的温度对比，证明了冷却装置设置的合理性和可行性。

Analysis of Temperature Rise Characteristics of Hybrid Excitation Flux Switching Linear Magnetic Suspension Motor

Aiming at the special structure of hybrid excitation flux switching linear magnetic suspension motor (HEFSLMSM), the temperature rise characteristics under different working conditions are analyzed deeply. The structure and operating principle of HEFSLMSM are studied. Three-dimensional steady-state temperature field mathematical model and boundary condition equation are established. Considering the heat exchange of each part of the motor, the thermal conductivity of each material and the convective heat transfer coefficient of different parts of the motor are determined. The copper loss and iron loss of the motor are calculated by using the finite element method, and the corresponding heat of formation is obtained. The temperature variation under the condition of no load and load with natural heat dissipation is calculated in the finite element software. The cooling system is designed on the basis of the original model, and the temperature field distribution under different working conditions after the installation of the cooling device is calculated respectively. The rationality and feasibility of the cooling device are proved by comparing the temperature of natural air cooling with forced water cooling.