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本文介绍一种由螺线管和一对圆形线圈构成的同轴、共心的组合线圈。当螺线管的直径和长度之比、一对圆形线圈的直径和间距之比、圆形线圈和螺线管韵直径比以及它们的匝数比或电流强度比取一定值时,非均匀磁场的三个主要项——二次项、四次项和六次项均可消去。计算结果(表1)表明,这种组合线圈的磁场均匀性较高,均匀磁场空间也相应地较大。
This article presents a coaxial, concentric combination of coils consisting of a solenoid and a pair of circular coils. When the ratio of the diameter and length of the solenoid, the diameter and pitch of the pair of circular coils, the diameter ratio of the circular coil to the solenoid, and their turns ratio or current intensity ratio take a certain value, the non-uniform The three main items of the magnetic field - quadratic terms, quadratic terms and six terms can be eliminated. The calculation results (Table 1) show that the magnetic field uniformity of the combination coil is high and the uniform magnetic field space is correspondingly larger.