The integral method is adopted caculate and analyze to amf three - dimension distruction which is the structure of coil type four - pole and the structure of coil type double - pole and study the size of two kind of electrode structure axial magnetic flux density distribution and its fielduniformity . the finite - element method is used simulate that eddy current has effect on amf when contact tray of douple - pole amf structure is slotted or no 本文采用积分方法对本文设计的线圈式两极纵向磁场触头结构和线圈式四级纵向磁场触头结构的纵向磁场三维分布进行了计算分析。研究了电弧燃烧期间两种触头结构纵向磁场强度的大小、均匀性,利用有限元法模拟线圈式两极纵向磁场触头结构的触头盘开槽和不开槽时涡流对纵向磁场的影响。
Through the research of amf contact structure , several kinds of improvement are proposed and the improvement effects of amf density have been analyzed by adopting finite element method with cae . after fully considering the influence of the vortex and residual amf , a new cup - type contact structure with amf has been confirmed 本课题通过对现行杯状纵磁场结构的研究,提出了几种改进方案,采用有限元法应用cae手段对改进方案的纵向磁场密度进行了分析,在充分考虑涡流和剩磁的影响后,从中确定了一种新的杯状纵磁场触头结构。
After the axial magnetism field of the vacuum interrupter is put into the iron core , the iron core makes the axial magnetic field distribute more uniform in the radial . the more uniform the axial magnetic field is distributed , the more uniform the vacuum arc is distributed on the surface of electrode . in the course of making , erosion on the surface of electrode is more uniform as well , so it is good for improving the breaking capacity of vacuum interrupt 在杯状纵磁真空灭弧室中加入铁芯后,铁芯使纵向磁场在径向的分布更均匀,这样可使真空电弧在电极表面上分布更为均匀;在开断过程中,电极表面的烧蚀也越均匀,有利于真空灭弧室开断能力的提高。
The calculation to the eddy current on the contact surface and axial magnetic field of contact surface and center surface of contact gap are carried out while the current is at zero . after the iron core of ring type is put in , the eddy current on the contact surface will be increased , the axial magnetic field that the eddy current creates will be also increased 对电流过零时触头表面的涡流和触头表面及触头间隙中心平面上的纵向磁场进行了计算,加入圆环型铁芯后触头表面的涡流增大,涡流产生的纵向磁场增大,在铁芯中开槽后涡流的平均水平降低,纵向磁场平均值降低。
The finite element model is built for the axial magnetic field of the cup vacuum interrupter contacts without iron core and with two kinds of iron core . the calculation and analysis of the three - dimension axial magnetic field distribution characteristic on the axial magnetic field of cup the vacuum interrupter with iron core are carried out for the first time 对无铁芯及两种铁芯结构的杯状纵磁真空灭弧室触头建立了有限元模型,首次对有铁芯的杯状纵磁真空灭弧室进行了三维纵向磁场分布特性的计算与分析。
