Friends who have used the laptop know that sometimes when charging, the laptop power adapter will emit a zippy sound, sometimes very small, sometimes very large is how it is? Even some people hear this sound is very afraid, this computer charging charging will not explode? Today let Eahunt take you to understand a little
In fact, the power adapter in the nuisance sound is the inductor coil in the alternating current through the magnetic field due to the vibration of the sound, the inductor coil is generally used in paint sealing, epoxy resin, heat-shrinkable tape and other means of encapsulation, generally if the enameled wire wrapping encapsulation process is over the top, it can be very good sealing to isolate the inductor coil vibration of the sound produced by the inductor will be very small sound, of course, if the power adapter's enameled wire wrap encapsulation process is not good, or used for a long time. Of course, if the power adapter's enameled wire wrapping encapsulation process is not passable, or after a long time of use, these encapsulation materials produce loosening, can not be sealed to isolate the inductor coil vibration of the sound generated by the noise, you will hear the noise.
If the power adapter in the work of the sound suddenly big and small, then it may be the upstream device of the inductor short-circuit, this situation may be dangerous, such as short-circuit laptop, sparks at the plug.
