低压塑壳式断路器触头打开时间的仿真与实验分析  

Simulation and Calculation on Opening Time of Contact in Low Voltage Molded Case Circuit Breakers

作　　者：李兴文[1] 陈德桂[1] 李志鹏[1] 刘洪武[1] 向洪刚[1] 

机构地区：[1]西安交通大学电气工程学院,陕西西安710049

出　　处：《低压电器》2004年第4期3-6,共4页Low Voltage Apparatus

摘　　要：触头打开时间对于低压塑壳式断路器的限流性能有重要意义。基于电流-磁场-电动斥力之间的方程并考虑铁磁物质的影响,应用三维有限元非线性分析,计算出作用在动导电杆上的电动斥力。通过耦合电路方程,并以动触头上的预压力为约束,经迭代运算,确定动触头的打开时间。实验表明计算方法和结果是正确的。The opening time of movable contact has remarkable effect on the limiting current performance of low voltage molded case circuit breakers. With 3-D finite element nonlinear analysis, according to the equations among current-magnetic field-repulsion force and taking into account the ferromagnet, repulsion force acting on the movable contact can be calculated. Coupled with circuit equations, the opening time of movable contact also can be calculated using iteration with the restriction of contact force. Experimental data shows satisfactory with simulation result.

关 键 词：低压塑壳式断路器 触头 打开时间 限流性能 仿真 实验 有限元分析 

分 类 号：TM561[电气工程—电器]