拍合式快速脱扣器特性研究

Research on Characteristics of Clapper Type Quick Release

以某型号直流断路器的拍合式快速脱扣器为研究对象,利用有限元计算软件对脱扣器的电磁吸力矩随气隙和电流变化的静态数据网格进行计算,然后联立短路电流方程和运动部件机械运动方程,考虑脱扣力的作用,采用四阶龙格-库塔法求解脱扣器的动作特性。最后,根据脱扣要求和计算得到的动作特性数据对脱扣器的结构进行改进设计,使其获得更好的脱扣性能,为脱扣器的设计提供了依据和参考。

This paper studied a certain type of medium voltage DC circuit breaker’s clapper type quick release.The magnetic torque is calculated with the variation of the current and air gap firstly.Considering the influence of tripping force,coupled with circuit equation and mechanism motion equation,the dynamic characterstics are obtained with Runge-Kutta method.According to the calculated trip movement characteristics,new models with structure optimization are designed in order to achieve better performance of tripping,which provides the basis and the reference for the design of the release.