This paper studies the contact bounce during the closing process of a repulsion mechanism applied in a superconductivity direct-current vacuum circuit breaker. A multi-physics field coupling simulation model is established to describe the whole closing process for the repulsion mechanism. The relationship between the V1 and Dmax is obtained for the repulsion mechanism, where the V1 is an instantaneous closing velocity for the movable contact just mating with the stationary contact at the first time, and the Dmax is the maximum contact bounce distance. According to this relationship, the critical instantaneous closing velocity Vcri for the case of no contact bounce is determined. According to Vcri, a novel oil buffer is designed to adjust the closing displacement of the repulsion mechanism to realize a nonclosing bounce. A prototype repulsion mechanism with an oil damper is developed. Its closing characteristics are tested and compared with the simulation results to verify the absence of a contact bounce.

中文翻译：

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超导直流真空断路器斥力机构合闸过程触头弹跳研究


本文研究了超导直流真空断路器中斥力机构合闸过程中的触头弹跳现象。建立了多物理场耦合仿真模型来描述斥力机构的整个闭合过程。对于斥力机构，得到V1和Dmax之间的关系，其中V1是动触头与静触头第一次配合时的瞬时闭合速度，Dmax是最大触头弹跳距离。根据该关系式，确定无触头弹跳情况下的临界瞬时闭合速度Vcri。据Vcri介绍，设计了一种新型油缓冲器来调节斥力机构的闭合位移，以实现非闭合弹跳。开发了带有油阻尼器的排斥机构原型。对其闭合特性进行测试并与模拟结果进行比较，以验证不存在接触弹跳。