Magnetic ring selection method suitable for low-power communication equipment

Abstract

The invention discloses a magnetic ring selection method suitable for low-power communication equipment. The method comprises the following steps: S1, establishing an equivalent circuit model; S2, presetting the highest frequency f0; s3, based on the equivalent circuit model and the highest frequency f0, obtaining an inductance value L for shielding frequencies above f0; s4, preliminarily selecting a first magnetic ring; s5, based on the first magnetic ring parameter and the inductance value L, calculating the number N of turns of a wire which needs to be wound by the magnetic ring, and based on the communication wire parameter of the low-power communication equipment and the first magnetic ring parameter, calculating the number n of turns of the wire which can be wound by a single layer of the magnetic ring; s6, selecting a magnetic ring with proper size and magnetic conductivity from the to-be-selected magnetic rings based on the number N of turns of the wire and the number n of turns of the single-layer windable wire, and repeating the steps S4-S6 until N / n is less than or equal to 1. Scientific and efficient model selection is carried out on the magnetic ring through a practical and simple method, electromagnetic interference in small-power communication equipment is shielded, and normal work of the equipment is guaranteed.

Description

technical field [0001] The invention relates to the field of device application, in particular to a magnetic ring selection method suitable for low-power communication equipment. Background technique [0002] With the development of information technology, more and more low-power electrical equipment, such as RTUs, monitors, and field data acquisition equipment, are equipped with radio communication functions, but radio communication is easily affected by electromagnetic interference in the environment, resulting in communication failure Or the result of incorrect communication information. The magnetic ring can effectively shield high-frequency electromagnetic interference, and the electromagnetic interference in the environment is generally high-frequency noise, so the magnetic ring is very helpful in resisting electromagnetic interference for small-power electrical equipment. [0003] The selection of the magnetic ring is very important for interference shielding and com...

AI Technical Summary

Problems solved by technology

[0003] The selection of the magnetic ring is very important for interference shielding and solving common mode interference. If the magnetic ring is not selected correctly, it may not be able to completely shield electromagnetic interference, or suppress normal working signals

[0004] Since professional electrical engineers do not need magnetic rings to resist electromagnetic interference, non-electrical practitioners who need magnetic rings do not understand electromagnetic compatibility and cannot perform related calculations. Non-electrical practitioners often rely on experience And I feel that the selection of the magnetic ring is not accurate enough, which leads to a waste of resources to a certain extent.

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