What is a power adapter? What are the effects?

Power adapter is also called external power supply (switching power adapter), it is a small portable electronic equipment and electronic electrical supply transformer, it is produced because in real life, electronic devices are often not direct use of household power, because the use of 220 volts power supply voltage at home,And common electronic products generally require a power supply voltage of 5 volts to 20 volts.

So the role of power adapter is vital (module power supply), especially if we go to the United States and other countries, the voltage is different from our country, then we need more 220V 110V transformer.

With it, we can use these electronic products conveniently and safely. So what does a power adapter do?

Composition and application of power adapter (Working principle of power adapter)

Power adapters are commonly found in small electronics such as mobile phones, liquid crystal displays and laptops. Generally composed of shell, power transformer and rectifier circuit, according to its output type can be divided into AC output type and DC output type; According to the connection mode can be divided into wall type and desktop type. It is widely used in mobile phone, game console, language rereading machine, Walkman, laptop, cellular phone and other equipment.

Power adapter for computer

Power adapter is widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communication equipment, power equipment, instrumentation, medical equipment, semiconductor refrigeration and heating, air purifier, electronic refrigerator, liquid crystal display, LED lamps, communication equipment, audio-visual products, security, computer cases, digital products and instruments and other fields. And in these areas have a role can not be ignored. So what are the functions of the power adapter?

The role of the power adapter

Generally speaking, the power adapter functions as a transformer and rectifier. Household AC is 220v, and our computer use is 12v DC (as if), so we can be sure that the power adapter is the transformer and rectifier. The adapter is the transformer, so we should all know that AC 220v through the transformer transformer, through the rectifier to DC, there is a consumption here, and these consumption will be converted into heat, so the power adapter will heat is normal. The transformer is made of silicon steel sheet. After the transformer is energized, it will generate magnetic flux, which will lead to the force effect between the silicon steel sheet and produce a buzzing sound, which is normal. But the fire of the earth sound is not normal, for many reasons: 1, AC voltage is unstable. 2. Chip damage. 3. Short circuit between turns. 4, component damage and so on. By the way, adapters are electronic products that convert alternating current into direct current

Power adapter space is generally built in, the general volume of the adapter is not small, small volume of the machine is external, in order to save space, the second is convenient to replace, the adapter with mains, voltage is relatively high, put the machine inside is more dangerous

A few points to note when using a power adapter

There are several items that need to be noted on the label of the power adapter (hereinafter called adapter).

First, is the adapter model, such as the adapter model is XVE-120100, it told us several information, is its manufacturer, wattage, XVE beginning is generally ## company code, 120100 is that the adapter is 12W, 050200 is 10W;

Second, it is the adapter INPUT(input), generally used in China is 100-240V~50-60Hz, which indicates that the adapter can work normally under the voltage of 100V-240V.

Third, it is the OUTPUT of the adapter. Two numbers can be used to calculate the wattage of the adapter very quickly. For example, the adapter, voltage 12V* current 1A=12W(power), indicates that the power supply is the adapter of 12W.

Most laptop power adapters are suitable for 100 to 240V AC (50/60Hz). Basically, most laptops have the power supply external, connected to the main computer through a power cord, which can reduce the size and weight of the main computer, only a few models have the power supply built into the main computer.

There is a nameplate on the power adapter, which marks the power, input and output voltage and electricity flow indicators, especially pay attention to the range of input voltage, this is the so-called "travel power adapter", if to the mains voltage only 110V country, this feature is very useful, some parallel laptop is only sold in the origin, There is no such compatible voltage design, even only 110V single input voltage, 220V mains voltage in our country will burn down when it is plugged in.

summarize

The purpose of the power adapter is to convert the high voltage in the home into a stable low voltage that can work, so that they can work properly. Without it will bring a lot of inconvenience to our daily use. This paper mainly introduces the function, composition and application of the power adapter and some problems to be noticed when using the power adapter.