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Inductor failure leads to routing problems _ Inductance coil _ electromagnetic coil

Inductor failure leads to routing problems

The computer in the partner dormitory is not on the network. The local connection is disconnected. I saw his router. I pulled the cable and found that the router's light is fully lit. This is obviously not normal. I opened the router. I heard that the inductance has a "beep" sound. I once removed this router. I didn't find such a sound. I carefully looked at the various chips and capacitors on the board. I didn't find any problems, so I decided that the problem was on the inductor. I estimated that the inductor is short-circuited. I inadvertently pressed an inductor and found that the LED indicator light has become normal. Then I can try it. The result can be up. I checked some materials and said that the problem is The inductor is magnetically leaked. If the leakage current is too large, the efficiency of the transformer is low, so the router does not work normally. I can help the partner save a few dozen dollars to buy a router, I am very happy, huh, huh. Below is a look at some of the effects on magnetic flux leakage and inductance.
Magnetic flux leakage is a certain gap between the coils. A small electromagnet is formed between the gaps. It has its own magnetic induction line and is closed. Therefore, magnetic induction is different from the theory. In fact, this is The non-ideal condition of the electromagnet can usually be determined by experimental methods. Magnetic flux leakage occurs due to the presence of air gaps and insufficient magnetic permeability when the core is assembled.
Magnetic leakage will constitute a decline in transformer replacement efficiency!
The effect of the inductor in the circuit: Detailed description: In the electronic circuit, the sumid inductor coil communicates the finite current effect, and it can form a high-pass or low-pass filter, a phase shift circuit and a resonant circuit with the resistor or the capacitor; the transformer can Conduct communication coupling, transformer, converter and impedance change. The larger the inductance of the coil, the greater the flow, and the more energy is stored.
Check the inductance is good or bad: use the inductance measuring instrument to measure its inductance; use a multimeter to measure its on-off, the ideal inductance is very small, almost zero.
The most common function of the inductor in the circuit is to form an LC filter circuit together with the capacitor. We now know that the capacitor has the function of “blocking DC, communicating”, while the inductor has the function of “through DC, blocking communication”. If the DC current with many disturbance signals is passed through the LC filter circuit, the communication disturbance signal will be consumed by the capacitor into heat energy; when the relatively pure DC current passes through the inductor, the communication disturbance signal is also turned into a magnetic sense. And thermal energy, the simplest impedance of the higher frequency is the impedance of the inductor, which can suppress the higher frequency of the disturbance signal.

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