共查询到19条相似文献，搜索用时 534 毫秒
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《绵阳师范学院学报》2018,(2):56-59
为了促进学生对电容器所储电能与电场能量之间联系的学习理解,利用电场能量公式及电容器能量公式计算圆柱形电容器的电容,提供了计算电容的另一方法,并将该方法与保角变换法求电容加以比较;利用高斯定理及场强叠加原理计算圆柱形电容器各表面电荷分布,结果表明,所带电荷只分布在相对的两柱面上. 相似文献
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非平行板电容器电容的又一算法 总被引：2，自引：0，他引：2
林炳火 《泉州师范学院学报》2005,23(6):52-54
用传统求电容的方法求非平行板电容器的电容值时颇为繁杂，然而，应用积分形式的电容特性公式C=[∫dl/εo（l）s（l）]^-1计算非平行板电容器的电容时则计算简单，物理图像清晰，计算结果精确．文中应用上述积分公式求出了非平行板电容器的电容值与用经典方法所得结果完全相同． 相似文献
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从电动力学出发，结合复变函数对非平行板电容器进行了分析。找到了非平行板电容器电容与电场强度的一种计算方法，给出了计算电容与电场强度的相应公式，并通过实例分析了它们在实际应用中的区别。 相似文献
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对特殊电容器一极板不平行的电容器进行了研究,主要采用数学物理方法中的复变函数及保角变换理论,结合电磁学和电动力学中的一些基本理论,对其进行了分析和研究,推导出了该类电容器特性参数一电场分布函数以及电容的计算公式,以及电场分布函数和电容值在具体条件下的计算方法． 相似文献
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本文由麦克斯韦方程组出发导出了各向同性介质电容器的内禀表达式,并把这一表达式应用于不同结构、不同介质的电容器的电容计算,结果表明该计算方法简便,物理意义直观明确. 相似文献
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关于非平行板电容器电容计算的讨论已历时多年,解决的方法很多.文献[1]～[5]对非平行板电容器电容的求解虽各有特点,但都涉及高等数学知识,本文从平行板电容器入手,利用补偿法给出求解非平行板电容器电容的的一种简单方法.
问题.设非平行板电容器的的极板AD、BC,长和宽分别为L和l,AD、BC两板的夹角为θ(θ很小,以致于sinθ≈θ,cosθ≈1)[3],且极板的长和宽均远大于两极板间的距离.求该非平行板电容器的电容. 相似文献
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In this paper, the influence of working electrolyte on high-frequency electrical performance of wet tantalum capacitors is studied. Emphasis is especially put on the study of the contribution of depolariser in reducing Equivalent Series Resistance(ESR). According to the theory of depolarization in electrochemistry and the theory of cathode capacitance of electrolytic capacitor, different kinds of depolarisers are added separately into the foregone electrolyte. Then capacitors are assembled with tantalum cores dipped with the compounded electrolytes. The best depolariser and its concentration in the whole electrolyte could be selected according to the test results of the capacitance and ESR of the capacitors. The results of our experiment show that depolariser Fe2 (SO4)3 used in working electrolyte of 100 V/IO0 μF wet tantalum capacitors can help to obtain lower ESR and higher capacitance at frequency from 0.1 kHz to 100 kHz. 相似文献
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关于电容器连接中能量损失问题的讨论 总被引：1，自引：0，他引：1
本文通过对电容电路的瞬态分析及仿真,解决了储能电容器与非储能电容器并联的电路中能量损失问题。在电容器的相互连接时,由于换路时电路的瞬态过程充放电电流非常大且连接导线的电阻不可忽略,因而,理想的纯电容电路的条件不充分,电路中能量和电量均守恒。 相似文献
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Multi-walled carbon nanombes with homogeneous diameters （40 - 60 nm）, produced by chemical vapor deposition of hydrocarbon gas, are purified by nitric acids. Infrared and Raman studies indicate that oxygen containing surface groups, which are predominately carboxylic, phenolic and lactonic groups, are introduced into purified carbon nanotubes. Then three kinds of block-form porous tablets of carbon nanotubes are fabricated as electrodes in electrochemical double-layer capacitors. Using mounded mixture comprising carbon nanotubes and binder powders provides these tablets. Comparison of the effect of different processing on the structural performance of the capacitors is specifically investigated. Using chemically treated electrodes, electrochemical double-layer capacitors with a specific capacitance of about 33 F/g are obtained with 38 wt % H2SO4 as the electrolyte. 相似文献
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A simple and inexpensive method of building a charge meter is discussed and as an application two experiments are suggested. A charge meter can be used for identification and measurement of charges on dielectric media such as teflon, nylon, silk and rubber balloon obtained by method of friction. Teflon and rubber balloon are found to be negatively charged while silk and nylon are found to be positively charged. A charge meter can also be used to measure capacitance of parallel plate capacitors and hence calculate dielectric constant of the medium between its plates. The values of dielectric constant of transparency plastic sheet and plain paper so obtained are 2.71 ± 0.08 and 4.8 ± 0.29. In the last part, the effective capacitance of a capacitor obtained by placing paper and transparency plastic sheet placed one above the other is shown to be equivalent to a series combination of individual paper and transparency plastic sheet capacitors. These experiments can be pedagogical tools for teaching electrostatics. 相似文献
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Yin-jun Wang Cheng Zhuo Jun-yong Deng Jin-fang Zhou Kang-sheng Chen 《浙江大学学报(A卷英文版)》2008,9(6):849-857
Power integrity （PI） has become a limiting factor for the chip＇s overall performance, and how to place in-package decoupling capacitors to improve a chip＇s PI performance has become a hot issue. In this paper, we propose an improved transmission matrix method （TMM） for fast decoupling capacitance allocation. An irregular grid partition mechanism is proposed, which helps speed up the impedance computation and complies better with the irregular power/ground （P/G） plane or planes with many vias and decoupling capacitors. Furthermore, we also ameliorate the computation procedure of the impedance matrix whenever decoupling capacitors are inserted or removed at specific ports. With the fast computation of impedance change, in-package decoupling capacitor allocation is done with an efficient change based method in the frequency domain. Experimental results show that our approach can gain about 5× speedup compared with a general TMM, and is efficient in restraining the noise on the P/G plane. 相似文献
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焦俊生 《通化师范学院学报》2010,31(4):32-33,46
在分析通用电容网络D／A转换器的基础上,给出了Ⅱ型电容网络单元及串联电容计算方法,提出了一种全新的Ⅱ型双极性电容输出D／A转换器,该电容网络拥有电容个数少,电容取值方便,在电子技术的应用领域具有重要的理论及应用价值． 相似文献
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以KMnO4为锰源,在180℃水热条件下反应24 h可控制备了α-,β-,δ-MnO2,采用高分辨扫描电镜、X射线衍射研究了它们的微观形貌和晶型结构,并通过循环伏安、交流阻抗和恒流充放电比较了三者的电化学电容器性能,结果表明,在6 mol/L KOH电解液中δ-MnO2表现出最好的电容性能,当电流密度为1 mA/cm2时,比电容最大,容量高达162.78 F/g。 相似文献
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以非线性电容RLC串联电路为研究对象,应用多尺度法求得2次超谐共振的幅频响应方程,并且通过数值计算可知,电子元器件的参数变化对振幅值具有影响,幅频响应曲线具有跳跃和滞后现象,即电阻可以抑制振幅值,电源、电容、电感可以增大振幅值。 相似文献