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史守华 《合肥师范学院学报》2002,(3):14-16
分别用磁能法和磁链法对两种同轴电缆的自感系数进行了计算.引入了三维导体磁链的定义,并据此计算了有横截面的同轴.电缆的自感系数,所得结果与磁能法一致. 相似文献
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本文利用互感线圈电路的微分方程推导得到互感线圈的磁能公式；求解互感线圈电路的微分方程，进而分析了互感线圈电路的暂态过程。 相似文献
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初中物理教学中应加强学生逆向思维的训练 总被引：3，自引：0，他引：3
逆向思维是一种与传统的、逻辑的或群体的思维方向完全相反的思维方式．它善于从相反的角度、不同的立场、不同的侧面去思考问题，当某一思路受阻时，能够迅速转移到另一思路，从而使问题得到顺利的解决．在物理学的发展中，许多重大的发明都运用了逆向思维．例如，法拉第在“电能生磁”的基础上进行逆向思维，萌发了“磁能否生电”的想法，终于发现电磁感应现象， 相似文献
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导体回路的自感系数,由于各因素的可变性和复杂性,通常采用实验方法测定。而同轴传输线,由于其结构和电流分布的特殊性,可根据自感系数的静态定义和动态定义,分别用三种方法来计算。 相似文献
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It‘s importat that HTS tapes have lower thermal conductivity and higher transversal resistivity in order to reduce the heat leaks conducted along the tapes and AC losses in the high temperature superconducting system conduction-cooled by GM coolers,This paper presents an experimental investigation into the effects of pure Ag and AgAu alloys sheath materials on the properties of Bi(2223) multifilamentary tapes and the optimisation of conduction-cooled hybrid current leads made from copper and Bi(2223)/Ag or Bi(2223/)AgAu tapes,The thermal conductivity of the tapes were measured by cryogenic steady healt flux method and the resistance was measured by using standard DC four-probe method at lo temperature,The results showed that the reduction of thermal conductivity by the addition of Au into the sheath material of Bi(2223) tapes was 65%,75% and 85% lower than that of pure Ag sheathed Bi(2223) tapes and the increase of resistivity was 4.9,10 and 19.4 times higher than that of pure Ag for the addition of 2.2%,5.7% and 10.7% Au(atom ratio )respectively.And the study also attempts to optimise thermodynamically the conduction-cooled hybrid current lead by using a devel-oped model ,which took the irrevesibility of commercial GM coolers,the contact resistance and thermal conductance into account,Predictions from the model showed that AgAu alloys were suitable candiate materials to replace Ag as sheath material of Bi(2223) tapes applied in THS current leads,In addition,Bi(2223)/AgAu was a suitable material to be applied as the THS section of hybrid current leads in conduction-coled superconducting electric systems. 相似文献
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在微磁学模拟理论中必须考虑交换作用能、磁各向异性能和静磁能和外磁场能,这四项能量中的任何一项都不能忽略。定性的理解和分析这四项能量对研究真实的磁化过程有非常重要的意义。本文介绍了微磁学模拟中必须考虑的四个能量项的产生机制和它们在微磁学模拟中的作用。 相似文献
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史守华 《安徽教育学院学报》2002,20(3):14-16
分别用磁能法和磁链法对两种同轴电缆的自感系数进行了计算，引入一三维导体磁链的定义，并据此计算了有横截面的同轴电缆的自感系数，所得结果与磁能法一致。 相似文献
10.
唐铸文 《荆门职业技术学院学报》1999,14(6):53-55
本文运用微积分理论准确描述了互感线圈的磁能,克服了文献[1]讨论这一问题的缺陷,深刻揭露了其物理问题的本质. 相似文献