220V transformer can convert various voltages to adapt to imported mechanical equipment.
Therefore, 220V transformer has become an irreplaceable pillar of modern industry.
This transformer is also called "power adapter:
Commonly used in mobile phones, liquid crystal displays, notebook computers and other small electronic products.
Generally, it consists of shell, power transformer and rectifier circuit, which can be divided into AC output type and DC output type according to the output type. According to the connection mode, it can be divided into plug-in wall type and desktop type. Widely used in telephones, game machines, language repeaters, walkman, notebook computers, mobile phones and other equipment.
Computer power adapter
Power adapters are 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 purifiers, electronic refrigerators, liquid crystal displays, LED lamps, communication equipment, audio-visual products, security, computer cases, digital products and instrumentation, and play an important role in these fields. So what does the power adapter do?
Functions of power adapter
Generally speaking, the power adapter is used as a transformer and rectifier. The alternating current at home is 220v, and the ground of our computer is 12v (it seems to be), so it can be determined that the power adapter is a transformer and rectifier. The adapter is a transformer, so we should all know that AC 220v is transformed by the transformer and then converted into DC by the rectifier. There is consumption here, which will be converted into heat, so it is normal for the power adapter to heat up. Transformers are made of silicon steel sheets. It is normal that the transformer will produce magnetic flux after being electrified, which will lead to the force between silicon steel sheets, thus producing buzzing. But the voice of the earth is abnormal for many reasons: 1, the AC voltage is unstable. 2. The chip is damaged. 3, turn-to-turn short circuit. 4, component damage and so on. By the way, adapters are electronic products that convert alternating current into direct current.
Power adapters with large space are generally built-in. Generally, adapters are not small, and small machines are externally connected. In order to save space, it is also convenient to replace them. The mains electricity and voltage used by the adapter are relatively high, so it is dangerous to put it inside the machine.
Several problems that should be paid attention to when using power adapter
There are usually several things to pay attention to on the label of the power adapter.
First of all, it is the model of the adapter. For example, the model of this adapter is XVE- 120 100. Tell us some information, such as its manufacturer, wattage and so on. XVE generally starts with # # company code, and 120 100 means that this adapter is 12W.
Secondly, the input of the adapter, which is generally 100-240V~50-60Hz in China, indicates that the adapter can work normally under the voltage of 100V-240V;
Third, the output of the adapter. Two numbers can quickly calculate the wattage of the adapter. For example, adapter voltage 12V* current 1A= 12W (power), indicating that the power supply is 12W adapter.
The power adapters of most notebook computers can be applied to 100~240V ~ 240 V AC (50/60Hz). Basically, most notebook computers use power cords to connect the power supply to the host computer, which can reduce the size and weight of the host computer. Only a few models of mainframe have built-in power supply.
There is a nameplate on the power adapter, indicating the indicators such as power, input and output voltage and current. Please pay special attention to the range of input voltage. This is the so-called "travel power adapter". This function is very useful if you go to a country where the mains voltage is only 165438+220V. Some parallel laptops are only sold in the country of origin, and there is no such compatible voltage design, even only 10V.
abstract
The function of the power adapter is to convert the high voltage at home into a stable working low voltage, so that they can work normally. Without it, it will bring a lot of inconvenience to our daily use. This paper mainly introduces the function, composition and application of power adapter, as well as some problems needing attention when using power adapter.