Vacuum circuit breaker is a kind of power equipment widely used in the power system. It is developing toward the direction of high voltage and high current. How to design the contact to maximize the interrupting capacity of the contact system has been conducted by scholars. In this paper, the magnetic field simulation model of contact system is established, the magnetic field distribution characteristics of vacuum interrupters are studied, and the distribution characteristics of the magnetic field in the half cycle of the cup‐shaped axial magnetic field contact system are simulated and analyzed. On this basis, by changing the contact structure parameters, the effects of the number of slots in the cup, the slot angle, the center hole of the contacts, and the length of the slots on the distribution of the axial magnetic field were obtained. The results show that grooving the contact can reduce the eddy current, but it has a limited effect on reducing residual magnetic field. The increase of slot angle of contact cup can effectively reduce the residual axial magnetic field at the zero current moment and the axial magnetic field intensity at the peak current moment. Based on the above research results, a new embedded axial magnetic contact system with 12 slots embedded magnetic ring and reverse contact cup is designed. The embedded magnetic ring and reverse spiral slot increase the axial magnetic field at the peak current moment and reduce the residual axial magnetic field at the zero current moment. Finally, the characteristics of the magnetic field have been improved significantly compared with the magnetic field of traditional cup‐shaped axial magnetic field contact. © 2020 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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真空灭弧室电极间磁场分布的研究

真空断路器是电力系统中广泛使用的一种电力设备。它正在朝着高电压和高电流的方向发展。学者们已经进行了如何设计接触器以最大化接触系统的中断能力的研究。建立了接触系统的磁场模拟模型，研究了真空灭弧室的磁场分布特性，并模拟了杯形轴向磁场接触系统半周期内的磁场分布特性。并进行分析。在此基础上，通过改变触头的结构参数，获得了杯状槽的数量，槽角，触头的中心孔以及槽的长度对轴向磁场分布的影响。结果表明，对触点进行切槽可以减小涡流，但在减小残余磁场方面效果有限。接触杯槽角的增加可以有效减小零电流时刻的残余轴向磁场和峰值电流时刻的轴向磁场强度。基于以上研究结果，设计了一种新型的带有12个槽的嵌入式磁环和反向接触杯的嵌入式轴向磁接触系统。嵌入式磁环和反向螺旋槽增加了峰值电流时的轴向磁场，并减小了零电流时的残余轴向磁场。最终，与传统杯形轴向磁场接触的磁场相比，磁场的特性得到了显着改善。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。