Wireless charging is a way to charge a device without using a traditional charging cable. It uses the principle of electromagnetic induction to charge by transferring electrical energy from the charger to the device. Wireless charging usually includes two parts: one is a wireless charger, which provides electricity by plugging into the power supply; The other is a wireless receiver, which is embedded in the device that needs to be charged. When the device is placed on a wireless charger, an electromagnetic field coupling is established between the two to achieve energy transmission and charging. The advantage of wireless charging is convenient and simple, there is no need to plug and remove the charging cable, just place the device on the charger to automatically start charging. However, due to the problems of energy loss and low efficiency in the process of energy transmission, there are still some limitations and room for improvement in wireless charging compared with wired charging.
First of all, it is clear that wireless, that is, there is no line, is a use of the principle of electromagnetic induction to transmit current. It's a close-range transmission from high to low.