Electric coil: description and application

2024 Author: Howard Calhoun | [email protected]. Last modified: 2023-12-17 10:16

An electric coil is a kind of inductive-type resistance for alternating current. If you introduce an element such as a steel core into the coil, you can significantly increase the inductance. By themselves, electrical devices do not connect, but if you nevertheless close them and connect a galvanometer, then its arrow will move.

Spiral Flat Type Coil

There is such a type of electric coil as a flat spiral. It is presented in the form of a primary winding of a transformer. The coil is usually placed on a disk of lead or zinc, which has a high electrical conductivity. Although you can use another material that will have the same quality. It is important that the material is able to maintain this quality at elevated temperatures. Such a disk is most often the secondary winding of the same transformer. If the temperature is within normal limits, then the conductivity value will be kept within normal limits for the specific raw material that is used.

Coil processing. Exploitationappliance

Few people know that electric coils need to be impregnated. Impregnation with various varnishes is carried out, and it is necessary in order to improve resistance to moisture, increase thermal conductivity. It is also possible to improve the electrical and mechanical strength. There are such classes of electric coils as A, B or E. Classification is carried out according to resistance to heat. Glossy and waterproof coatings must withstand temperatures up to 250 degrees Celsius.

When an electric current is applied to this device, the bracket is retracted along with the core. The brace moves into position when it begins to press on the stem, which moves along with the rubber membrane. The movement of the rod entails a decrease in the internal volume of the sealed cavity to its minimum value. An increase in this plane is also possible. This can happen due to the action of the spring, as well as the own mass of the rod, which will begin to return to its original position when the current stops and the bracket returns to its original state.

Ferrozond

Ferroprobe is an electric coil with a core, which is presented in the form of a magnetically soft ferromagnet. It is powered by alternating current. This part is very sensitive to parameters such as the magnitude and direction of the magnetic field.

At the moment, in engineering, devices and devices, coils are used in an electrical circuit, which may or may not have a core. It should be noted that in order to isolate the turns of suchelectrical equipment, paper is used, which is pre-impregnated with varnish. Such devices with an electric current in the coil are most widely used in the field of electrical engineering. Most often they are built into measuring devices. In them, the coil is presented in the form of a winding, which is located on a frame of a certain shape. The base itself also has flanges, as well as a cover.

Types of coils

Today, many different types of such devices are known.

For example, a device with a winding on the frame, flanges with protrusions. These protrusions have small chambers, which are shaped like the letter T. In such grooves there are petals used for soldering the ends, they have the shape of the letter G. Among the disadvantages of such a coil, the complexity of its design, as well as the complexity in the technological process, stand out. In addition, for stable operation of the electric field of the coil, it is necessary to solder the leads to the petals. This procedure is performed during winding. The downside was that because of this, the productivity of all connected winding equipment is reduced.

Another well-known type of device is a frame with flanges on which protrusions are located, as well as holders for contacts. The protrusions in this case are made with a recess. In such recesses, the holder is located for contact with the U-shaped groove. With this type of device, the disadvantage is that during the winding of the coil at high speed, there is a high chance of both contacts and their falling out.holders.

Coil with terminal

An electric coil is used, the winding of which is located on a frame with flanges. On one of them there is a terminal holder, as well as output contacts. The main difference from other devices of this type is that the holder is made in the form of a partition. There are two side protrusions, which are located symmetrically, as well as a central one. It is mounted taking into account a small gap, which is installed in relation to the side protrusions in such a way that the result is a U-shaped channel. Contacts will be placed in this channel in the future. It is also worth noting that each side protrusion has a through hole.