The difference between magnetic ring and magnetic core
The magnetic ring is not so magical as it is said. It is only necessary to match what kind of magnetic ring according to the characteristics of the product. The size and characteristics of each magnetic ring are different. Of course, the larger the magnetic ring, the better the impedance characteristic, because it contains There are more materials. The magnetic ring is generally used in the place of interference, mainly to prevent the external chaotic signals from intruding into the electronic equipment, and it can pass the useful signals through the electronic equipment well.
One point is that when choosing a magnetic ring, it depends on whether there are gaps and burrs on the surface. These problems will cause the characteristics of the magnetic ring and fail to perform its function well. When using it, you must use the magnetic ring impedance. Various related instruments such as tester and inductance tester are used for testing. The impedance tester can check that the magnetic ring can reach a certain impedance value, and the inductance tester mainly measures the inductance of the magnetic ring. At the same time, if you want a magnetic ring with good performance, it is not only necessary to test, but the key is to start with production. Production is a part of the life of a magnetic ring. The quality of a magnetic ring depends on every process of production. Strict testing will be carried out later, so that a high-quality magnetic ring can be made.
The characteristics of the magnetic core: the magnetic core is also made of ferrite material, but its shape is special, there are E-shaped magnetic cores, and tile-shaped magnetic cores and other various shapes. The E-shaped magnetic core is made by winding copper wire to become a transformer. The transformer is inserted on the circuit board to achieve an induction effect. The tile-shaped magnetic core is also referred to as a two-piece magnetic core. The two-piece magnetic core is similar in shape to a tile, and is generally assembled through a plastic shell to become a clip-on magnetic ring or an assembled magnetic ring. There are a variety of names, most of which are used in the dry winding line, directly buckled at the source of the dry winding, can play a very good impedance characteristics.
