不同转子通风结构对高压异步电机传热特性的影响

为了降低高压异步电机的温升、强化电机内部的对流传热，以一台额定功率为1 250 kW的高压异步电机为研究对象，基于计算流体力学和对流传热优化的场协同理论，设计了新的转子通风结构。建立电机三维耦合分析模型，对电机进行流热耦合分析，借助数字化仿真技术计算并比较了新老转子通风结构下的电机各个通风道的流体流动及传热特性。从对流传热优化的场协同角度，得出了不同转子通风结构下的电机温升和温度分布规律，为高压异步电机通风结构优化设计提供参考依据。最后，将新电机结构的温升计算结果与样机的型式试验结果进行对比，温升误差仅为4%，验证了计算方法的准确性和有效性。

Influence of Different Rotor Ventilation Structures on Heat Transfer Performance of High Voltage Induction Motor

In order to reduce the temperature rise of high voltage induction motor and strengthen the convective heat transfer inside the motor, taking a high voltage induction motor with the rated power of 1 250 kW as the research object, a new rotor ventilation structure is designed based on computational fluid dynamics theory and convective heat transfer optimization. The three|dimensional coupling analysis model is established to analyze fluid thermal coupling of the motor. With the help of digital simulation technology, the fluid flow and heat transfer characteristics of each ventilation duct of the motor under the ventilation structure of new and old rotors are calculated and compared. From the perspective of field synergy of convection heat transfer optimization, the temperature rise and temperature distribution of the motor under different rotor ventilation structures are obtained, providing a reference for the optimization design of the ventilation structure of high voltage induction motors. Finally, the temperature rise calculation results of the new motor structure are compared with the type test results of the prototype, and the temperature rise error is only 4%, which verifies the accuracy and validity of the calculation method.