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The magnetic loop inductor is an electronic component. Its main function is the conversion of electromagnetic induction. An electrical wire is the simplest inductance. It is used as an antenna to convert electrical energy into electromagnetic waves. The air-core coil is a little more complicated than the antenna. , Used for frequency selection loop and RF transmitting circuit;
Air-core coils usually have very low inductance and have no magnetic conductors. In addition to antennas and air-core coils, there are also I-shaped inductors, which can be used for filtering and energy storage. There are also magnetic ring common mode inductors that can be used to suppress interference.

The components on the PC board, such as resistors, capacitors, and chips, are both an electromagnetic interference object and a source of electromagnetic interference during operation. Electromagnetic interference can be roughly divided into two categories: differential mode interference (series mode interference) and common mode interference (ground interference).
Take the two PCB wires on the motherboard (the wires connecting the components of the motherboard) as an example. The so-called differential mode interference refers to the interference between the two wires; the common mode interference is the interference between the two wires and the PCB ground wire. Interference caused by potential difference. Differential mode interference current acts between the two signal lines,
Its conduction direction is consistent with the waveform and signal current; the common mode interference current acts between the signal line and the ground wire, and the interference current flows through half of the two signal wires in the same direction, and the ground wire is the common loop .

Since the use of anti-interference magnetic ring in the circuit can increase high-frequency loss without introducing DC loss, the effect of suppressing noise signals above high frequency is very obvious, so magnetic ring inductance is widely used on circuit PCB boards.
The core of the magnetic toroidal inductor is brittle and easy to be damaged when dropped. Therefore, protection measures must be taken during transportation. When designing, the power required by the circuit must match the magnetic toroidal inductance. If the power is too large, the inductance will heat up to the magnetic ring After Curie temperature