中文摘要：

为了得到126 kV真空灭弧室2/3匝线圈型纵磁触头的优化设计参数,文中采用实验设计—磁场有限元计算—统计分析相结合的方法,对触头间纵向磁场特性进行了单因素分析和正交回归分析。选取触头开距、单匝线圈高度、线圈宽度和触头片槽长4个设计参数作为优化对象,以电流峰值时纵向磁感应强度最大、磁场滞后时间最小和导体电阻值最低作为优化目标,得到了磁场特性与触头结构参数之间的回归方程以及对纵向磁场产生显著影响的设计因素。基于上述分析,对电流峰值时纵向磁感应强度、磁场滞后时间和导体电阻进行多目标优化,当触头开距为20 mm,线圈宽度为20 mm,单匝线圈高度为15 mm,触头片槽长为30 mm时,纵向磁场特性最优。优化后,电流峰值时的纵向磁感应强度增至0.565 T,磁场滞后时间缩短为0.729 ms,导体电阻减小为19.885μΩ。

英文摘要：

For determining the optimum design parameters of a 2/3 turn coil-type contact with axial magnetic field （AMF） for a 126 kV vacuum interrupter,the combined experimental design-finite element calcula- tion-statistical analysis method is adopted to conduct single factor analysis and orthogonal regression analysis on AMF characteristics of the contact. The contact gap, single coil height, coil width, and slot length of contact plate are chosen as optimized parameters, and the axial magnetic flux density at current peak, phase shift time, and conductor resistance are chosen as optimized targets. Regression equations of AMF characteristics and con- tact parameters, as well as the contact parameters, which have significant influences on AMF characteristics, are obtained. Multiple objective optimization of the axial magnetic flux density at current peak, the phase shift time, and the conductor resistance is performed to achieve optimal values of the contact parameters. It is con- cluded that AMF characteristics become optimal when the contact gap is 20 mm, the single coil height is 15 mm, the coil width is 20 mm, and the slot length of contact plate is 30 mm. After optimization, the axial magnetic flux density at current peak increases to 0.565 T, the phase shift time decreases to 0.729 ms, and the conductor resistance decreases to 19.885 μΩ.