旋转双断点塑壳断路器触头开距对电动斥力影响的仿真研究  

Simulation and Research on the Influence of Contact Gap on Electrodynamic Repulsion Force for Rotating Two-Breakers MCCB

作　　者：刘志伟[1] 吴刚[1] 李兴文[1] 屈建宇[1] 

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049

出　　处：《电器与能效管理技术》2015年第17期8-12,共5页Electrical & Energy Management Technology

基　　金：国家自然科学基金项目(51222704)

摘　　要：以额定电流250 A的旋转双断点塑壳断路器(MCCB)为研究对象,仿真研究了其触头开距对电动斥力的影响。基于麦克斯韦方程组,用有限元分析软件Ansys将电场和磁场耦合起来计算出电动斥力与电流和触头开距之间的定量关系;得出电动斥力在电流一定时随着开距的增加而先增大后减小的变化规律。最后,基于旋转双断点的机构特点,对电磁场和受力情况进行定性分析,进而分析了旋转双断点MCCB触头开距对电动斥力的影响,对MCCB的设计提供一定的依据。Taking the rotating two-breaker MCCB with 250 A rated current as on object,this article has simulated and studied the influence of contact gap on electrodynamic repulsion force. Based on Maxwell equations describing the coupling of electromagnetic field, the eleetrodynamie repulsion force varied with the current and contact gap can be calculated with the finite element analysis software Ansys. Furthermore,with the simulation results, the variation law was summarized out that eleetrodynamic repulsion force increases initially and declines ultimately with the increase of the contact gap. Finally,with the existence of mechanism characteristics of rotating two-breaker MCCB,analyzing qualitatively its electromagnetic field and force applied on it ,the eleetrodynamie repulsion force of the MCCB was investigated with the influence of contact gap ,which provides theoretical reference for the optimization design of MCCB.

关 键 词：旋转双断点 塑壳断路器 电动斥力 变化规律 机构特点 仿真研究 

分 类 号：TM561[电气工程—电器]