Wireless charging that can be charged simply by placing a smartphone on a charging pad (wireless charger) that can be seen on the latest smartphone.In addition to the word wireless charging, it is called wireless power supply or non -contact power supply.
The biggest feature is that it can be charged without a cable.It's very convenient, but don't you wonder how to charge it without a cable in the first place?
Therefore, I will explain the wireless charging mechanism, and the benefits and precautions for those who are wondering whether to use it in the future.
Sending power without using a cable is called "wireless power transmission", and "wireless charging" is used for charging.There are several types, and the "radio -type" that can fly power far away has laser, microwave, and ultrasonic methods.What is used in smartphones is a "non -radiation type" that can be used at a relatively close distance, and the "electromagnetic induction method" in the iPhone 8 and later, such as the iPhone X series, is the "electromagnetic induction method".
The electromagnetic induction method is known for the international standard "Qi" (Chi), which is arranged by a standardization organization called "WPC".The iPhone is compatible with Qi.The charging pad that supports this Qi standard is that the iPhone that is compatible with and complies with the Qi, the smartphone equipped with Android, and the earphones and electric toothbrush can be wirelessly charged (compatible).
Why wireless charging can be charged without a cable, the mechanism called the "principle of electromagnetic induction" is working.
1.The charging pad contains a "power transmission coil".When electricity is poured, this coil reacts, a magnetic field (magnetic flux) is generated and released into the air.By the way, there is no danger because the electric field does not flow in the air, but the magnetic field is generated.
2.Bring a smartphone with a "power receiving coil" on the charging pad.The coil in the smartphone is converted into power in response to the magnetic field in the air.
3.At this time, a guided current occurs, and the power is stored in the battery.