微型直流断路器中电弧电动力仿真分析

Simulation analysis of arc electrodynamic force in miniature DC circuit breaker

为了提高微型直流断路器灭弧的可靠性,以微型直流断路器灭弧过程为研究对象,分析了电弧运动轨迹,研究微型直流断路器中永磁体在不同位置的磁性强弱对电弧电动力的影响,并利用Ansoft Maxwell软件对其进行仿真计算。仿真结果表明,在同一位置下,加强永磁体的磁性可以提高电弧电动力,加快电弧进入灭弧室的速度,从而提高灭弧的可靠性,为进一步提高微型直流断路器灭弧可靠性研究提供了重要参考依据。

In order to improve the reliability of the arc extinguishing of a miniature DC circuit breaker,the present paper takes the arc extinguishing process of the miniature DC circuit breaker as the research object.Firstly,the arc motion track is analyzed.Then,the influence of the magnetic strength of the permanent magnet in different positions on the arc electrodynamic force is studied,and Ansoft is used.The simulation results show that strengthening the magnetic property of the permanent magnet at the same position can improve the arc electrodynamic force,accelerate the speed of the arc entering the arc chamber,and improve the reliability of the arc extinguishing,which provides an important reference for further improving the reliability of the arc extinguishing of the miniature DC circuit breaker.