With the continuous expansion of application range of self-healing dry metallized film capacitor,its heat dissipation mode and internal temperature-rising have become important theoretical and engineering problems.In view of this,the heat flow distribution of heating body of overall heating and even heating of cicular element of capacitor is analyzed on the basis of the heating rule of the circular element of the DC-link capacitor.Furthermore,the thermal calculation model of the circular element is set up in combination with the principle of electro-thermal duality,and the thermal resistance calculation formula of a circular element is obtained through the integration of the differential cells.Finally,the correctness of the thermal calculation model of circular element is verified through the test,and the verification method of thermal calculation of circular element is proposed,which will provide theoretical and test reference for the heating of circular element of DC-link capacitor.
关键词
直流支撑电容器/干式电容器/圆元件/散热模型/轴向散热/径向散热
Key words
DC-link capacitor/dry type capacitor/circular element/model of heat dissipation/axial heat dissipation/radial heat dissipation
维普
万方数据