摘要
基于分子电流环模型,利用毕奥·萨伐尔定律建立了能够实现单块永磁体磁感应强度分布的三维模型;通过坐标变换的方法,得到可描述任意大小永磁体组合的磁感应强度分布的模型。以Halbach型永磁轨道作为研究对象,建立了完整的三维计算模型。通过对比分析,得到磁感应强度的解析解、实测值以及有限元解的一致性结果,肯定了模型的正确性。
Based on the molecular current cycle model,a 3D numerical model is built to describe the magnetic field distri- bution of a single permanent magnet by using Biot-Savart Law. Then, through coordinate transformation,a model to de- scribe the magnetic field distribution for any sizes of perma- nent magnets and any combinations is obtained. According to the Halbach type track, a complete 3D numerical model is built, and correctional parameters are introduced into the mod- el by comparison and analysis. The correctness of the model is further verified by the measured data and finite element simu- lation results.
出处
《城市轨道交通研究》
北大核心
2017年第9期26-29,共4页
Urban Mass Transit
基金
国家自然科学基金项目(51375404)
关键词
永磁轨道
磁感应强度
三维计算模型
permanent magnet track
magnetic field distribu-tion
3D numerical model
