Coil diameter about 100 mm, wire diameter about 0.5 mm.
Wireless charger refers toInstead of connecting the traditional charging power cord to the charger on the terminal device that needs to be charged, the latest wireless charging technology is adopted. By using the magnetic field generated between the coils, the magical transmission of electrical energy, inductive coupling technology will become a bridge connecting the charging base station and the device.
It is measured that the line diameter of the air-core coupling coil of the parallel resonant loop formed by the capacitor is O.5 mm, the diameter is 7 cm, the inductance is 47 uH, and the carrier frequency is 2 MHz. According to the parallel resonance formula, the matching capacitance C is about 140 pF. Therefore. The launch department selected the 2MHz active crystal generation and resonance frequencyIn wave and medium wave loops, its Q value can reach 150-250, and has high stability.
2, wireless charging of the transmitting and receiving coil distance of about 8mm. The QI standard is not just the distance between the two, but the frequency and communication protocol of the two wireless charging standards. This distance is a maximum distance, beyond which the efficiency of wireless reception is very low. So it doesn't have to be 8mm.
3, according to the positive and negative electrode connection. How is the wireless charging coil wound, placed and how to control the charging power, using the electromagnetic mutual inductance phenomenon, through the magnetic field couplingTwo coils can complete the transfer of electrical energy. Below, we discuss how to efficiently complete the transmission of electricity. This involves how the coil is wound, placed and how to control the charging power. Wireless charger refers to the use of electromagnetic wave induction principle for charging equipment, the principle is similar to a transformer.
4, same size. The same size and as close as possible, otherwise it will have no effect, low conversion efficiency.
5, sometimes the iPhone protective case is too thick will also lead to wireless charging, then you can try to remove the iPhone protective case, and then put back on the wireless charging board to charge. <6, does not support long-distance charging, may reach this technology in the future, what is wireless charging technology, according to a report in the United States, there have been research institutions out of the wireless charger can be long-distance, this charger includes a transmitter with a plug, an electronic receiver, As long as the power supply is within a certain range, it can be transmitted to a terminal device with a receiver.
Wireless charging base to increase the coil, or do not modify it, you increase the coil not only did not play a good effect but affect the speed of charging, increase the coil is equal to increase the resistance, it will make the current slow, the coil is proportionally wound, too much or too little can not, coil wound less, there will be damage to the parts, resulting in parts burned spark, For some do not arbitrarily modify the wireless charging base.
Wireless charging will not accelerate battery aging, will not have radiation to the body. The principle of wireless charging is electromagnetic induction. The charging dock is like an iron core with some primary coils wrapped around it. There are secondary cables inside the phoneCircles. The primary coil is energized to generate electromagnetic induction, so that the secondary coil generates induction voltage, and generates induction current to charge the mobile phone after loading. So don't worry.
Can not, too much increase the voltage or increase the number of turns will burn the battery, because the more you turn the higher the voltage, I do not know whether your self-made charger is Qi program, if it is Qi, it is not possible, this must be close contact, you have to change to radio wave type, within five meters.
The mobile phone charging base generates a high-frequency alternating magnetic field, and when the phone is placed on the charging base, the alternating magnetic field passes through the handThe induction coil in the machine generates high-frequency alternating voltage inside the phone, and then converts the high-frequency alternating voltage into direct current through the rectifier circuit in the phone to charge the phone.
1, wireless charging technology is relatively new technology at present. The principle is somewhat similar to the propagation of electromagnetic waves in the air, but the transmission distance is not far, generally only ten centimeters to be more effective. Because the transmission distance is very close, in order to achieve charging, you must waitThe charging device can only be charged if it is close to the charger. After that, it doesn't work.
2, wireless charging principle: electromagnetic induction. The charging base and the mobile phone terminal have built-in coils respectively. When the two are close, the generating coil generates a certain current in the mobile phone receiving coil based on a certain frequency of alternating current through electromagnetic induction, thereby transferring the point energy from the originating end to the receiving end, and then starting to supply power to the mobile phone from the charging seat. Magnetic resonance.
3, generally about 0.9-2 meters high-power wireless charging transmission distance up to 5 meters wireless charging technology can be divided into small power wireless charging and largePower wireless charging two ways. Low-power wireless charging often uses electromagnetic induction, such as the Qi method of charging mobile phones, but ZTE's electric vehicle wireless charging method uses induction.
4, if in accordance with the charging efficiency is relatively normal, harmless to the human body in terms of standards, now can do the farthest distance should be 5-10cm, domestic micro goose technology, Qualcomm should be able to do. And this is not the public familiar with Qi wireless charging, is magnetic resonance wireless charging, based on the principle of magnetic resonance. Although there are also 1 meter or even farther wireless charging technology, but the current charging power of these are too small to chargeThe electric speed is too slow to put into daily use.
1, to 48mm. The minimum size of wireless charging receiving coil is 46 to 48mm, different mobile phone models will be different, wireless charging receiving coil is to accept the current emitted by the wireless charging transmitting coil, when the transmitting coil emits the current, the receiving coil receives the emitted current to the current storage end.
2, the mobile phone wireless charger is about 50mm in diameter of the mobile phone coil,The diameter of the charger end is about 46 to 48mm, which may vary depending on the phone model, but the best transmission method is that the phone end and the charging end coil are the same size.
3, wireless charging coil shape and transmission distance introduction: wireless charging of the transmitting and receiving coil distance of about 8mm. The QI standard is not just the distance between the two, but the frequency and communication protocol of the two wireless charging standards. This distance is a maximum distance, beyond which the efficiency of wireless reception is very low. So it doesn't have to be 8mm.