Common coil
1. Single layer coil
The single-layer coil is wound on the paper cylinder or bakelite frame with insulated wires one by one. Such as a transistor radio medium wave antenna coil.
2. Honeycomb coil
If the plane of the wound coil is not parallel to the rotation plane, but intersects at a certain angle, this coil is called honeycomb coil. The number of times that the wire bends back and forth after one rotation is often referred to as the number of turns. The advantages of honeycomb winding method are small volume, small dispersion capacitance and large inductance. The honeycomb coil is wound by the honeycomb winding machine. The more the folding points, the smaller the scattered capacitance
3. Ferrite core and iron powder core coil
The inductance of the coil is related to the presence or absence of a magnetic core. Inserting a ferrite core into an air core coil can increase the inductance and improve the quality of the coil.
4. Copper core coil
The copper core coil is widely used in the ultra short wave range. The position of the copper core in the coil is used to change the inductance. This adjustment is convenient and durable.
5. Color code inductor
The color code inductor is an inductor with a fixed inductance, and its inductance is marked by a color ring like the resistance.
6. Choke coil
The coil that restricts the passage of alternating current is called choke coil, which is divided into high-frequency choke coil and low-frequency choke coil.
7. Deflection yoke
The deflection coil is the load of the output stage of the TV scanning circuit. The deflection coil requires high deflection flexibility, average magnetic field, high Q value, small size and low price.
