Power adapter (Power adapter) is also called external power supply (switching power adapter). It is a kind of small portable electronic equipment and power supply voltage conversion equipment for electronic appliances.
Application of power adapter
Power adapters are widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communication equipment, electrical equipment, instrumentation, medical equipment, semiconductor cooling and heating, air purifiers, electronic refrigerators, liquid crystal displays, LEDs Lamps, communication equipment, audio-visual products, security, computer cases, digital products and instruments and other fields, and have a role that cannot be ignored in these fields. So what are the functions of the power adapter?
The role of the power adapter
Generally speaking, the role of power adapter is transformer and rectifier. The household AC power is 220v, and our computer uses DC 12v (as if it is), so we can be sure that the power adapter is a transformer and rectifier. The adapter is a transformer, so we should all know that AC 220v is transformed through a transformer and DC through a rectifier. There is consumption here, and these consumption will be converted into heat, so it is normal for the power adapter to generate heat. The transformer is made of silicon steel sheet. After the transformer is energized, it generates magnetic flux. The magnetic flux will cause a forceful effect between the silicon steel sheets, which will produce a humming sound. This is normal. But the sound of overheating ground is abnormal, for many reasons: the AC voltage is unstable; the chip is damaged; the short circuit between the turns; the component is damaged and so on. By the way, the role of the adapter is to convert AC to DC electronic products.