【摘要】 当断路器分断故障电流时 ,分析作用于触头系统上的电动斥力对于断路器的优化设计非常重要。本文在三维积分方程法的基础上 ,分析触头接触面上电流线收缩、触头臂上的电流及非线性灭弧栅片对电动斥力的影响 ,并制作了样机 ,在低压大电流回路上对该方法进行了验证。使用该方法能够计算作用于万能式和塑料外壳式断路器触头系统的电动斥力 ,为低压断路器的触头系统设计提供一种新的方法更多还原

【Abstract】 When circuit breakers cut off the fault current, it is very important for optimum design of circuit breakers to calculate the electrodynamic repulsion force acting on the contacts system. Based on three dimensional integral equation method, we calculated the repulsion forces due to current constriction at the contacts and current flow the contacts and nonlinear iron plates. In order to testify the accurate of this method, we made a sample and tested it in low voltage large current loop of our lab. This method is very suitable for calculating the electrodynamic repulsion forces acting on ACB and MCCB, and it is also a new method for the contacts system design of low voltage circuit breakers.更多还原