key points and principle for wirelesscharger

Principle
 
A wireless charger refers to a charger that is not connected to the terminal device that needs to be charged without a traditional charging power cord. It adopts the latest wireless charging technology. By using the alternating magnetic field generated between the coils, the power is transmitted, and the inductive coupling technology will Become a bridge connecting charging bas e stations and devices.       
            
Physicists have long known that energy can be efficiently transferred between two objects with the same resonant frequency, while the interaction between objects of different frequencies is more efficient.
weak. That's how a singer can shatter one of the bottles with different volumes of water without disturbing the others. It's like when we swing on a swing, just sit on it and let the drooping legs swing in sync to power the swing. Wireless charging technology takes advantage of this principle. Similarly, wireless charging technology also applies the principle of electromagnetic wave induction and related AC induction technology. A technology that uses corresponding coils at the sending and receiving ends to send and receive induced AC signals for charging. The charging device can be charged by placing it on a "tablet". This charging method has appeared in watches and shavers in the past, but at the time, it was not possible to effectively charge large-capacity lithium-ion batteries.
1. The wireless charging system mainly adopts the principle of electromagnetic induction, and realizes the transmission of energy through energy coupling through the coil. When the system is working, the input terminal converts the AC mains power into DC power through the full-bridge rectifier circuit, or directly supplies power to the system with the 24V DC power terminal.
2. After passing through the power management module, the output DC power is converted into high-frequency AC power by the 2M active crystal oscillator inversion and supplied to the primary winding. The energy is coupled through two inductive coils, and the current output by the secondary coil is changed into direct current by the receiving conversion circuit to charge the battery.
3. A changing magnetic field will produce a changing electric field, and a changing electric field will produce a changing magnetic field, the magnitude of which is related to their rate of change, and the rate of change of the sine function is another sine function, so the electromagnetic wave can propagate out, and the induced voltage The generation of the magnetic flux is related to the change of the magnetic flux, so the changing magnetic field inside the coil generates an induced voltage to complete the charging process.
4. Mobile phone wireless charging is a relatively novel charging method. Of course, the working frequency of wireless charging is relatively high, and the effect of energy transfer can even be achieved by abandoning the iron core and directly between the coils.