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静电控制电子管的渗透率,已经用麦克斯韦尔法推导出若干不同的计算公式。其中包括计算小阴-栅距平板型三极管的渗透率的弗莱敏公式和计算大阴-栅距平板型电子注功率管的渗透率的斯班庚伯公式。但是,人们需要知道如何计算小阴-栅距电子注功率管的渗透率。本文对推导渗透率公式的传统的麦克斯韦尔法作了改动,使之具有更清晰的物理意义。利用改动过的麦克斯韦尔法,成功地解决了小阴-栅距电子注功率管渗透率的计算问题,得到了平板型系统和圆柱型系统统一的计算公式。所得到的计算公式,在特殊情况下又可分别还原为弗莱敏公式和斯班庚伯公式——并且还可得到它们的圆柱型系统的表示式。也就是说,我们的公式具有普遍的性质。这个公式的导出,必将有益于现代的功率电子管,特别是有益于超功率电子管的优良性能的获得。
Electrostatic control of the permeability of the tube, Maxwell method has been used to derive a number of different formulas. Including the formula for calculating the permeability of the small Yin - grid spacing transistor Flemish formula and calculation of the large Yin - grid spacing of the electron tube power injection tube penetration Banbury formula. However, one needs to know how to calculate the permeability of a small negative-pitch electron injection tube. In this paper, the traditional Maxwell method for deriving the permeability formula has been modified to make it more explicit in physical meaning. By using the modified Maxwell method, the calculation of the permeability of the small-yin-pitch electron injection tube has been successfully solved, and the uniform formula of the plate-type and cylinder-type systems has been obtained. The resulting formulas can, in special cases, be reverted to the Fleming's formula and the Spanner's formula, respectively - and the representation of their cylindrical system can also be obtained. In other words, our formula has a universal character. The derivation of this formula will certainly benefit the modern power tube, especially the good performance of the super power tube.