共查询到10条相似文献,搜索用时 125 毫秒
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圆形线电流的磁感应强度 总被引:43,自引:11,他引:32
用磁标势法计算了圆形线电流的磁感应强度。利用这个结果证明了圆形线电流平面中心的磁感应强度有极小值,给出了圆环回路的自感系数的计算公式。 相似文献
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介绍一种自制的磁各向异性测量装置,该装置结构简单,造价低廉,在测量过程中显示工作原理清楚直观,使用磁性薄膜中小颗粒作为样品,测量结果稳定可靠,适合学生实验使用。 相似文献
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超导磁悬浮的物理演示 总被引:1,自引:1,他引:0
论述一台高临界温度超本磁悬浮列车物理课堂演示装置,该装置为一个盛放高监界温度超导体的列车模型,在具有磁束缚的封闭磁轨道上方悬浮;或在磁轨道下方倒挂“悬浮”,并可在直线电机加速装置或旋转磁场加速装置作用下,沿这一长度约为1.7m的封闭磁轨道,以悬浮或倒挂“悬浮”状态无摩擦地连续运转。 相似文献
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A study of two-dimensional magnetic polaron 总被引:1,自引:1,他引:0
By using the variational method and anneal simulation, we study in this paper the self-trapped magnetic polaron (STMP) in
two-dimensional anti-ferromagnetic material and the bound magnetic polaron (BMP) in ferromagnetic material. Schwinger angular
momentum theory is applied to changing the problem into a coupling problem of carriers and two types of Bosons. Our calculation
shows that there are single-peak and multi-peak structures in the two-dimensional STMP. For the ferromagnetic material, the
properties of the two-dimensional BMP are almost the same as that in one-dimensional case; but for the anti-ferromagnetic
material, the two-dimensional STMP structure is much richer than the one-dimensional case. 相似文献
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根据力系简化原理,载流线圈在磁场中所受之作用可归结为作用在简化中心的合磁力与对简化中心的合磁力矩,本文推证了合磁力和合磁力矩的计算公式。 相似文献
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用尽量简单的装置演示对地磁场水平分量的测量,在课堂上,只需将磁铁悬起观测其简谐振动周期,便可计算地磁场水平分量。 相似文献
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The paper proposes a novel structure for a permanent-magnet-biased radial hybrid magnetic bearing. Based on the air gap between the rotor and stator of traditional radial hybrid magnetic bearings, a subsidiary air gap is first constructed between the permanent magnets and the inner magnetic parts. Radial magnetic bearing makes X and Y magnetic fields independent of each other with separate stator poles, and the subsidiary air gap makes control flux to a close loop. As a result, magnetic field coupling of the X and Y channels is decreased significantly by the radial hybrid magnetic bearing and makes it easier to design control systems. Then an external rotor structure is designed into the radial hybrid magnetic bearing. The working principle of the radial hybrid magnetic bearing and its mathematical model is discussed. Finally, a non-linear magnetic network method is proposed to analyze the radial hybrid magnetic bearing. Simulation results indicate that magnetic fields in the two channels of the proposed radial hybrid magnetic bearing decouple well from each other. 相似文献
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Abstract We report a simple alternating current magnetometer. It is based on the principle of an ordinary Hartshorn bridge. The use of a two-channel oscillator allowed us a simple construction and a sensitivity of magnetic moment better than 10?6emu, normally sufficient for superconductivity studies. The whole system is controlled by a personal computer to collect the data automatically. 相似文献