紧凑型高压电机冷却器数值分析与设计

Design and Numerical Analysis for the Cooler in Compact High-voltage Motor

为了研究冷却器结构对其散热性能的影响,根据流体力学和传热学理论,对YJKK紧凑型高压三相异步电动机的冷却器进行了流体场与温度场的耦合计算并通过温升实验验证了计算的正确性和研究方法的可行性.在不改变冷却器外形尺寸的条件下,改进了电机的冷却器的内部结构,分别对冷却器内部挡风板、弧板和冷却管数量进行改进计算.结果表明,改进后的冷却器在额定工作点时风阻更小、冷却效果更好,可有效降低电机温升提高电机运行的可靠性.同时,改进后的冷却器整体安装尺寸无变化,切实可行,对于YJKK系列电动机的冷却效果的提升提供了理论依据和新方法.

In order to study the influence of cooler structure on the cooler performance, according to the theory of fluid mechanics and heat transfer, the cooler YJKK compact high-voltage three-phase asynchronous motor are coupled computational fluid field and temperature field calculation and verify the feasibility and correctness of the method through the experiment of temperature rise. Without changing the cooler size conditions, improving the in- ternal structure of motor cooler, the cooler the windshield, arc plate and the cooling tube amount were optimized. The results show that the improved cooler at the nominal point risk smaller, better cooling effect, can effectively re- duce the temperature rise of the motor to improve the reliability of motor operation. At the same time, cooler im- proved the overall size of installation without change, feasible, and provides theoretical basis and new method for the cooling effect of YJKK series motor improvement.