A working principle of magnetic ring inductor

December 06, 2022

Magnetic Ring Inductor is an electronic component component, the main role is a role of electromagnetic induction conversion, the simpler inductor can be a wire, it can be used for antenna. Convert electrical energy into electromagnetic waves, more complex is a hollow line diagram, it can be used for frequency selection circuit and RF transmitter circuit, more than the first two Inductors, there are I-Beam Inductors, can be used for filtering, energy storage.

Magnetic ring inductor PC board on the chip in the work process is both an electromagnetic interference object, but also a source of electromagnetic interference. In general, we can divide these electromagnetic interference into two categories: series mode interference (differential mode interference) and common mode interference (ground interference). The two PCB lines on the motherboard (connecting the motherboard components of the wire) as an example, the so-called series-mode interference, referring to the interference between the two lines; and common mode interference is the potential difference between the two lines and the PCB ground caused by interference. Series-mode interference current acts between the two signal lines, the direction of conduction and waveform and signal current; common mode interference current acts between the signal lines and ground, interference current flows through each of the two signal lines in one-half and the same direction, and the ground as a common loop.

Ferrite beads can be used in circuits to increase high frequency losses without introducing DC losses, and are small in size and easy to install in the leads or wires of the zone.

Ferrite beads are effective for filtering low impedance power supply circuits, resonant circuits, Class C power amplifiers, and silicon controlled switching circuits. Ferrite beads of magnetic ring inductor material can generally be divided into two categories: resistive and inductive, which can be selected according to the needs when used. The impedance of a single bead is generally ten to several hundred ohms, and the application can be used in series with more than one bead if the amount of attenuation is not enough, but usually the effect will not be significantly increased when more than three.

Author:

Ms. Song

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