同轴薄膜电容器结构参数的优化设计

An Optimal Design Method for Structural Parameters of Coaxial Film Capacitors

分析了同轴薄膜电容器电参数和结构参数之间的关系,提出了以单层同轴薄膜电容器个数、两侧锥角和内芯外径等参数为变量,以实现各个单层同轴薄膜电容器薄膜介质厚度差异最小化为目标的设计方法。设计了一种耐受电压为1 MV,电容为200pF,电容器长度不大于400mm,外径不大于300mm的同轴薄膜电容器。其中,单层同轴薄膜电容器为13个,两侧锥角为34°,内芯外径为140mm。最后通过模拟计算验证了上述优化设计方法的合理性。

The relations of structural and electrical parameters in a coaxial film capacitor are analyzed,and an optimal design method for structural parameters is presented with design variables such as the number of single coaxial film capacitors,the cone angle and the outer diameter of inner core,aiming at minimizing the thickness differences of film dielectrics of all the single coaxial film capacitors.Based on the proposed method,a 1 MV/200 pF coaxial film capacitor with the length not more than 400 mm and the outer diameter not more than 300 mm is designed,and the structural parameters of the capacitor are optimized,among which the number of single coaxial film capacitors,the angle of the cone and the diameter of the inner core are 13,34°and 140 mm,respectively.Finally,the feasibility of the above design method is verified by simulation.