Working principle of wireless charger

source:Industry news release time:2022-08-19 Hits: Popular:aromatherapy diffuser direct sales

　　The principle of wireless charger is that the wireless charger device transmits the energy to the charging terminal device through near-field induction, and then the terminal device converts the received energy into electrical energy and stores it in the battery of the device. The principle of energy transmission is inductive coupling, which can ensure that there is no exposed conductive interface. It can not only eliminate the messy transmission lines between devices, but also be safer for electronic devices such as electric toothbrushes that are often in contact with conductive media such as liquids.

　　What are the forms of wireless charging?

　　At present, there are mainly three forms of wireless charer:

　　1. Electromagnetic induction wireless charger

　　2. Magnetic resonance wireless charger

　　3. Radio wave wireless charger

　　Electromagnetic induction wireless charger is the most widely used wireless charging solution. Alternating current with a certain frequency passes through the primary coil, and then electromagnetic induction is used to generate a certain current in the secondary coil, so as to transfer energy from the transmission end to the receiving end. At present, the most common charging pad solution adopts electromagnetic induction. In fact, the electromagnetic induction solution does not have much mystery in the technical realization.

　　This is a relatively mature technology, similar to the ore radio used in the early stage. It is mainly composed of microwave transmitting device and microwave receiving device, which can capture the radio wave energy bouncing back from the wall and maintain a stable DC voltage while adjusting with the load. This method only requires a transmitter installed on the wall plug and a "mosquito type" receiver that can be installed on any low-voltage product.