Today to share the knowledge of wireless charging coil matching, which will also explain the structure of the wireless charging coil, if you happen to solve the problem you are now facing, don't forget to pay attention to this site, start now!
< ul>1, the loss of components affects the internal resistance of wireless charging fast and slow components, and the conversion efficiency of the system is high. The selection of components such as triode with small internal resistance can greatly improve the efficiency of wireless charging. However, with low internal resistance, the cost will be relatively high.
2. GND is ground. The common negative electrode. This stuff improves efficiency. One, coil material. With two-wire structure, the effective conductive area decreases due to the skin effect of high frequency conduction. Therefore, the coil can be wound with multiple strands of wire (insulation between wires). Three use low voltage drop diodes. Fourth, the electromagnetic wave is attenuated by the square of the distance, so the closer the distance, the higher the transmission efficiency.
3, protect the phone: Apple's magnetic phone case is made of high-quality materials, which can effectively prevent the phone from being damaged by impact, friction and scratches, and protect the appearance and internal parts of the phone from damage.
4, mobile phone: iPhone14 system: iOS16 Apple 1Energy transmission, even at a larger transmission distance, the transmission power can still reach several kilowatts. 2, not only Japan, there are many countries are researching wireless charging roads, at the end of last year, the world's fourth largest automobile manufacturer Stellantis announced on the official website that their innovative dynamic induction charging technology has proved successful after years of research and months of testing. The road "Arena del Futuro" for wireless car charging testing has been officially opened. So now wireless charging technology is also a very hot ranks.
3. Electric carsWireless charging technology mainly uses the mutual inductance in the law of electromagnetic induction. It is also similar to a transformer, which inputs from the primary coil and then generates an induced current on the secondary coil. It mainly relies on the energy transmission between electricity and electricity, converts electricity into magnetism, and then induces electricity. Wireless charging is simply to charge electrical equipment through electromagnetic fields or electromagnetic waves without being connected by physical wires.
4, for pure trams, the most reliable scheme is electromagnetic induction, which is more stable and reliable. Although magnetic resonance can have a higher power distance advantage than electromagnetic induction (numberCentimeter to several meters), but difficult to control, high technical difficulty, it is not easy to support the use of electric vehicles (this may be the future direction of wireless charging).
5. The electric vehicle wireless charging technology transmits electric energy in the form of high-frequency alternating magnetic field through the power supply guide rail buried under the ground to the electric energy picking mechanism running in a certain range of the vehicle receiving end, and then supplies power to the vehicle energy storage equipment. When charging begins, the power transmitter PTx generates an alternating current through its coils, which creates an alternating magnetic field according to Faraday's Law.
6, the wireless charging principle of the carIt is done by converting electrical energy into electromagnetic waves, which are then sent to the receiver, and then the electromagnetic waves are converted into electrical energy. Charging technology is not complex, mainly the use of electromagnetic induction and magnetic resonance, but the biggest difficulty of wireless charging is that the lack of a unified standard, charging time is too long, efficiency is too low, high cost.
You have normal no-load voltage and low on-load voltage. The no-load voltage is normal, indicating that your wireless charging transceiver circuit is normal, but the voltage is pulled down after loading.The biggest possibility is that your coil matching is not good, resulting in insufficient power received by the output end, so the charging voltage will be pulled down.
Wireless charging technology is the use of electromagnetic induction principle, in the sending and receiving end with the corresponding coil to send and receive the induced current to charge.
What are the components of wireless charging? The left side is TX, that is, the transmitter, and the corresponding product is the wireless charging transmitter. On the right is Rx, that is, the receiving end, and the corresponding product is a mobile phone with wireless charging function. TX end: MCU, full power bridge, and composed of inductors and capacitorsLC resonant Tank, where the inductor is the transmitting end coil.
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