The Application And Function Of The Power Adapter

The power adapter is also called an external power supply (switching power adapter). It is a small portable electronic device and a power supply voltage conversion device for electronic appliances. Let me briefly understand the application and function of the power adapter.
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 refrigeration and heating, air purifiers, electronic refrigerators, liquid crystal displays, LED lamps , communication equipment, audio-visual products, security, computer cases, digital products and instruments and other fields, and they all play 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 the power adapter is a transformer and a rectifier. Household AC is 220v, and our computer land is DC 12v (it seems to be), so it is certain 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 converted into 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 sheets. After the transformer is energized, it will generate magnetic flux, and the magnetic flux will cause force between the silicon steel sheets, resulting in humming sound. This is normal. However, the sound is abnormal due to excessive grounding, and there are many reasons: unstable AC voltage; chip damage; inter-turn short circuit; component damage and so on. By the way, an adapter is an electronic product that converts alternating current to direct current.