基于磁热耦合法的电机模型参数计算

基于有限元法与集总热网络法建立电机温升模型,仿真计算电机瞬态温升。针对电机温升模型参数繁多且计算复杂的问题,从损耗分布和热量传递的角度,系统研究了电机的电磁参数和热参数。根据电机的结构参数建立物理模型,通过电磁仿真结合解析计算修正漏感参数,计算配置端部及外壳换热系数,等效处理定转子气隙对流系数,采用磁热耦合法计算温升。通过试验与仿真对比电机主要部位温升,验证了电机参数计算的准确性。

Calculation of Motor Model Parameters Based on Magneto Thermal Coupling Method

Based on the finite element method and the lumped heat network method, the temperature rise model of the motor is established, and the transient temperature rise of the motor is simulated. In view of the variety and complexity of the model parameters of motor temperature rise, the electromagnetic parameters and thermal parameters of motor are systematically studied from the perspective of loss distribution and heat transfer. According to the structural parameters of the motor, the physical model is established. The leakage inductance parameters are modified by electromagnetic simulation and analytical calculation. The heat transfer coefficients of the end and the shell are calculated. The air gap convection coefficients of the stator and rotor are treated equivalently. The temperature rise is calculated by the magneto thermal coupling method. By comparing the temperature rise of the main parts of the motor through experiment and simulation, the accuracy of motor parameters calculation is verified.