In order to improve the thermal dissipating performance of the motor and to improve the condi-tions of the motor temperature rise, a numerical analysis method was applied to optimize the cooling per-formance of the motor cooler. For AC induction motor YKK closed structure, because of its structural characteristics, the temperature rise is one of key points of the design that is concerned. Firstly, taking a YKK450-4,800kW medium size high voltage asynchronous motor was taken as an example. By creating its 3 D physical and mathematical model of cooler of the motor and giving its basic assumptions and bound-ary conditions according to CFD theories, the fluid field and temperature field were calculated and ana-lyzed, and their contours of cooler were shown. Secondly, by changing the numbers and the positions of the windshields, increasing the deflector and change its position, its optimal values were got. Finally, the cooler was remodeled. Numerical analysis shows that the performance of cooler is significantly improved, which provides theoretical basis for optimizing future design of cooler.%为了提高电机的散热性能,改善电机的温升条件,本文采用数值分析的方法对电机冷却器的冷却性能加以优化. 对于YKK结构的封闭式交流异步电动机,因其结构特点,温升一直是设计时需要关注的重点问题之一. 首先,以YKK450-4、800 kW中型高压异步电机为例,建立电机冷却器的三维物理模型和数学模型,给出假设条件和边界条件,并进行数值分析,得到了冷却器的流体场和温度场是分布云图;其次,通过改变挡风板的个数及位置、增加导风板并改变其位置,找到其最优值;最后,对冷却器进行重新建模,经过数值分析发现冷却器的性能有了明显的改善,为以后冷却器的优化设计提供理论依据.
展开▼
