A 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, including S1, establishing an equivalent circuit model; S2, preset the highest frequency f 0 ; S3, based on the equivalent circuit model and the highest frequency f 0 get shield f 0 The inductance L of the above frequency; S4, initially select the first magnetic ring; S5, calculate the number of wire turns N required to wind the magnetic ring based on the parameters of the first magnetic ring and the inductance L, and, based on the communication wire parameters of the low-power communication equipment Calculate the number n of coils that can be wound in a single layer of the magnetic ring with the parameters of the first magnetic ring; S6, based on the number of turns N of the wire and the number n of coils that can be wound in a single layer, select the one with the appropriate size and permeability among the magnetic rings to be selected. For the magnetic ring, repeat steps S4‑S6 until N / n≤1; use a practical and simple method to scientifically and efficiently select the magnetic ring to shield the electromagnetic interference in the low-power communication equipment and ensure the normal operation of the equipment.

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. However, 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 has a good anti-electromagnetic interference help for low-power electrical equipment. [0003] The selection of the magnetic ring is very important to the interference shielding and solv...

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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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