The principle of the power adapter
The principle of the power adapter - 2019 08 - 14 power adapter also called external power supply ( Switch power adapter) , it is a small portable electronic devices and electronic appliances, the power supply change of implement, it is a result of in real life, electronic devices are usually cannot be used directly for household electricity, for home use is 220 v power supply voltage, the voltage of power supply and common electronic products generally required for about 5 v to 20 v. Therefore, it is very important to the function of the power adapter is ( Module power supply) , especially if you go to the United States and other countries, voltage and different in our country, it is more need for 220 v to 110 v transformer. With it, we can be convenient and safe use of these electronic products. So, what is the function of the power adapter? The composition of the power adapter and applications ( Working principle of the power adapter) The power adapter is common in mobile phones, LCD display and laptop computers and other small electronic products. Generally consists of shell, power supply transformer and rectifier circuit, according to its output type can be divided into the ac and dc output; According to the connection mode can be divided into the plug wall and desktop type. Used in telephone composite aircraft, game consoles, the language repeater equipment, walkman, notebook computers, cellular phones, etc. Computer with the power adapter, power adapter is widely used in industrial automation control, military industry equipment, scientific research equipment, LED lighting, industrial control equipment, communications equipment, electrical equipment, instrumentation, medical equipment, semiconductor refrigeration and heating, air purifier, electronic refrigerator, LCD, LED lamps and lanterns, communications equipment, audio and video products, security, computer case, digital products and equipment, and other fields, and in these areas have the effect that cannot ignore. So what is the role of the power adapter? The role of the power adapter in general, the power adapter function is a transformer and rectifier. Home is a 220 v ac, and our land for computer is dc 12 v ( As if) , so can be sure the power adapter is a transformer and rectifier. Adapter is transformer, so we should all know, ac 220 v through a transformer transformer, through the variable dc rectifier, here is consumption, the consumption will be transformed into heat, so the power adapter will be fever is normal. Made in silicon steel sheet, transformer after electrify, produce magnetic flux, flux between silicon steel sheet will incur to produce force, to produce buzzing sound, this is normal. But far the voice is not normal, the reason a lot of: 1, the ac voltage is not stable. 2, chip breakage. 3, turn-to-turn short circuit. 4, component damage and so on. By the way, the role of adapter is to convert alternating current into direct current electronics power adapter are generally built in space is large, generally adapters are not small volume, small volume of the machine is external, in order to save space, and change is convenient, mains adapter, put inside the machine voltage is higher, more dangerous computer with power adapter and the effect of application ( Working principle of the power adapter)