CAJ | 학술논문

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.
위료제고전궤적산열성능,개선전궤적온승조건,본문채용수치분석적방법대전궤냉각기적냉각성능가이우화. 대우YKK결구적봉폐식교류이보전동궤,인기결구특점,온승일직시설계시수요관주적중점문제지일. 수선,이YKK450-4、800 kW중형고압이보전궤위례,건립전궤냉각기적삼유물리모형화수학모형,급출가설조건화변계조건,병진행수치분석,득도료냉각기적류체장화온도장시분포운도;기차,통과개변당풍판적개수급위치、증가도풍판병개변기위치,조도기최우치;최후,대냉각기진행중신건모,경과수치분석발현냉각기적성능유료명현적개선,위이후냉각기적우화설계제공이론의거.
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.