When the wireless charging receiving coil is working, it is harmless to people's health. The wireless charging receiving coil is used to generate a certain current in the secondary wireless charging receiving coil through the inductor, so as to transfer the energy from the transmitting end to the receiving end. It is only transmitted between wireless charging receiving coils that resonate at the same frequency, and other devices cannot accept the band.
The wireless charging receiving coil uses magnetic resonance to transmit electrical energy in the electric and magnetic fields between the charger and the device, while the wireless charging receiving coil and capacitor form resonance between the charger and the device.
Wireless charging receiving coils can be widely used, such as charging areas for electric vehicles and power transmission for computer chips. The charging time required for a charging system developed using this technology is only one-hundred-fifth of the current charging time.
The loss of wireless charging receiving coil inductance is lower than that of wired charger coil. The conversion rate of wireless charging is several percent higher than that of wired charging. High conversion, precise radiation range control, it can also automatically identify different devices and energy requirements Carry out "personalized work" to effectively ensure the continuous supply of energy.
The wireless charging receiving coil is essentially an antenna coil, and the commonly used indicators are impedance and frequency. The wireless charging receiving coil is divided into two types: transmitting and receiving. There are close-range and long-range, but considering electromagnetic radiation, it is still used at close range (2- 3mm) is suitable, and there are many manufacturers to support; the resonant frequency of the transmitting coil and the receiving coil should be the same, and they should be used in pairs, that is to say, the QI standard is a wide frequency band (110Khz-205Khz); The technology of the coil is different. If the installation environment of the transmitting antenna allows, you can use thicker copper wire and multi-layer winding, which means that the thickness of the antenna is not important. However, the receiving antenna should be ultra-thin considering the installation location, especially for smart For mobile phones, only the inner side of the casing has space for installation; for the wireless charging receiving coil antenna in the mobile phone, the best installation position is on the inner side of the mobile phone casing, because the charging gap is large, the charging efficiency will be low, one micron corresponds to about 0.1mA current loss, 1000 microns ( 1mm) will lose more than 100 mA.