Inductance of a Solenoid螺线管的自感量
![]() The inductance of a coil of wire is given by 线圈的电感由下式给出
![]() This is a single purpose calculation which gives you the inductance value when you make any change in the parameters. 这是一个单一目的的计算,用于在更改参数时给出电感值。
Small inductors for electronics use may be made with air cores. For larger values of inductance and for transformers, iron is used as a core material. The relative permeability of magnetic iron is around 200. 用于电子设备的小电感器可能使用空气芯制作。对于较大的电感量和变压器,铁被用作磁芯材料。磁铁的相对磁导率约为200。
This calculation makes use of the long solenoid approximation. It will not give good values for small air-core coils, since they are not good approximations to a long solenoid. 这一计算使用了长螺线管近似。它不会对小空气核心线圈给出良好的结果,因为这些线圈并不是良好的长螺线管近似。
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