摘要
设计了一种新型真空灭弧室线圈式纵向磁场触头结构,这种不对称式结构中,静触头具有两层以串联方式相连接的线圈,而动触头侧无任何线圈,使动触头结构大为简化,机械强度得以加强,而动触头质量的减轻将有利于触头开断速度的提高。利用有限元方法建立三维结构模型并仿真,在电流分别处于峰值和电流过零时,得出静触头表面、触头间隙中心平面和动触头表面上的纵向磁场分布以及纵向磁场的滞后时间。仿真结果表明,该不对称式触头结构具有较强的纵向磁场,电流过零后的剩余磁场小、滞后时间短,且导电回路电阻较小。
In this paper a novel axial magnetic contact for vacuum interrupters is designed,which has the desired magnetic field distribution and the excellent breaking property.The asymmetric contact structure is composed of a static contact,which has two coils in series,and a moving contact without any coil.Therefore,the structure of the moving contact will be simplified,its mechanical strength be enhanced,and its weight be reduced,which is helpful to raise the breaking speed of the vacuum interrupter.Using finite element method,the 3-D electrode model is built and the simulation for the axial magnetic field has been carried out.With the amplitudes of the breaking current at peak and zero,it would be calculated the axial magnetic Field distribution at static contact surface,at moving surface,and at the middle plane between the static and moving contact,respectively.The phase delay time of the axial magnetic field is considered as well.The simulation results provide that this asymmetric structure of the axial magnetic field contact can generate strong and uniform axial magnetic field.The amplitude of the residual magnetic field is small and its phase delay time after the current zero is short.Moreover,the resistance in the conductive loop is small.
出处
《高压电器》
CAS
CSCD
北大核心
2010年第6期60-63,共4页
High Voltage Apparatus
关键词
真空灭弧室
纵向磁场
触头
三维仿真
vacuum interrupter
axial magnetic field
contacts
3-D simulation