Views: 1 Author: Simon Publish Time: 2022-10-31 Origin: Site
The installation position of the hollow coil should meet the design requirements. The assembly position of the hollow coil and the relative position of the other elements should meet the design requirements, otherwise it will affect the normal work of the whole machine. For example, the position of the high frequency choke coil and the magnetic antenna in the simple semiconductor radio should be properly arranged and reasonable. Tubular antenna coil and oscillation tubular coil should be perpendicular, so that you can avoid the influence of mutual coupling 2 air-core coil before installation, check for appearance Before use, should check whether the structure of the hollow coil, wire turn whether there is loose and loose phenomenon, contact any loose, lead core rotation is flexible, the presence of slide fastener, etc After these aspects are checked, the installation of 3 hollow coil needs to be fine-tuned in the use process, and the fine-tuning method should be considered. Some hollow coil needs to be fine-tuned in the use process, and it is very inconvenient to rely on changing the number of hollow coil. Therefore, the selection should take into account the fine-tuning method For example, the single-layer hollow coil can be removed by the method of several coils near the end, that is, 3 ~4 turns of one end of the hollow coil in advance, and the inductance amount can be changed by moving its position during fine tuning. Practice has proved that this adjustment method can achieve fine tuning of the inductance amount by 2%-3% In the hollow core coil used in short wave and ultrave loop, half a turn is usually set aside as fine tuning. Removing or folding this half turn will change the inductance to realize fine tuning of multi-layer segmtioned hollow core coil. The fine tuning can be achieved by moving the relative distance of a segment, and the number of turns of movable segments should be 20%-30% of the total number of turns Practice has proved that the fine tuning range can reach 10%-15% for hollow coil with magnetic core. The fine tuning of inductance of hollow coil can be realized by adjusting the position of magnetic core in hollow coil tube. 4 When using hollow coil, attention should be paid to keeping the inductance of original hollow coil in use The size and distance between the hollow coils, otherwise it will affect the original inductance of the hollow coils, especially the hollow coils with higher frequency and fewer turns. Therefore, the high-frequency hollow coils used at present are generally sealed and fixed with high-frequency wax or other medium materials. 5 The installation of the adjustable hollow coils should be easy to adjust The adjustable coil shall be installed in an easily adjustable position of the machine so that the inductance of the coil can be adjusted for optimal operation.