摘要
基于真空断路器的结构,采用有限元方法建立了三相真空断路器的磁场数学模型.通过对真空断路器在分断过程中三相电流在整个变量周期内的数值模拟,得到了三相电流在不同相位角时对相间磁场的影响.为了降低相间磁场的相互影响,在三相灭弧室间以铁磁材料作为屏蔽,分析了在不同长度和厚度的铁磁材料下,最大磁感应强度值产生的变化,为真空断路器向大电流、小型化发展提供了理论依据.
Based on the Vacuum Circuit Breaker (VCB) structure,adopting the Finite Element Method (FEM),magnetic field mathematics model of three phases VCB is established.Through the whole cycle numerical simulation to three phases current in the opening course,the magnetic field influences at different phase angles of three phases current are clearly obtained.In order to reduce the interactional influences,the ferrous materials are put in the middle of every phase as shield.The varieties of maximum magnetic induction strength in different length and thickness of ferrous materials are obtained.The theory foundations of VCB developed for large capacity and miniaturization are provided.
出处
《沈阳工业大学学报》
EI
CAS
2004年第3期274-276,286,共4页
Journal of Shenyang University of Technology
关键词
相间磁场
真空断路器
数值分析
phased magnetic field
vacuum circuit breaker
mathematics analysis
