A Study on the Influence of the Iron Core Structure on the Magnetic Field Distribution in the Cup-Shaped Axial Magnetic Contact of Vacuum Interrupters
As an environment--friendly apparatus,vacuum interrupters are widely used in power systems.In the process of vacuum breaking,the axial magnetic field can effectively avoid constriction of the vacuum arc,thereby reducing the contact erosion and improving the breaking capability.In this paper,the influence of the iron core structure on the axial magnetic field is studied.Four different iron core structures,namely,the pie-shaped iron plate,the toroidal iron core,the eight-split iron plate and the twelve-split iron plate are applied the same contact cup respectively to obtain the axial magnetic field distribution in the arc column region.The results show that the high axial magnetic field region is closely related to the position of the iron plates.This study is useful to the design of contacts in the vacuum switch breaking system,and help to expand the application of vacuum breaking technology in power systems.
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