No. Each wireless charging coil will have a certain amount of energy loss, increasing the number of coils will lead to a decrease in the overall charging efficiency, more coils will increase the energy loss and mutual interference, thus reducing the efficiency of wireless charging; And increasing the number of coils requires more coils and associated circuits to be installed in the device, which increases design complexity and cost.
Magnetic resonance charging, the principle is the same as the resonance principle of sound. Coils of the same vibration frequency arranged in a magnetic field can exchange energy with each other. If the coil is large enough, long-distance transmission is possible, but highThe magnetic field is transmitted through the air and then converted into a current to be transmitted to the intelligent terminal. When the system works, the input end converts the AC mains into direct current through the full bridge rectifier circuit, or uses the 24V direct current end to supply power to the system directly. After passing through the power management module, the output direct current is converted into high-frequency alternating current through the 2M active crystal oscillator inverter to supply the primary winding.
Wireless charging system mainly adopts the principle of electromagnetic induction. Wireless charger refers to the charger that does not need to be connected to the terminal device that needs to be charged without the traditional charging power cord, using the wireless charging coil gain With the latest wireless charging technology, by using the magnetic field generated between the coils, the magical transmission of electrical energy, inductive coupling technology will become a bridge connecting charging base stations and devices.
Wireless charging methods include electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, etc. Wireless charging of mobile phones mostly uses the principle of electromagnetic induction. Electromagnetic induction wireless charging, when the current of the power supply through the coil (wireless charger supply coil) will generate a magnetic field, the wireless charging coil gain his unenergized coil (mobile phone side of the electric coil) close to theThe magnetic field creates an electric current that charges the phone. As shown below.
Generally seen wireless charging, the use of the "current magnetic effect" and "electromagnetic induction" principle. In 1819, Danish scientist Elster observed that if there is an electric current on a wire, a magnetic field will be generated around it, which can deflect the north finger. Later generations have further found that the wire is encircled into a ring, or even wound into a coil, and the magnetic field generated will be stronger and more concentrated, which is called the "current magnetic effect."
The principle of wireless charging technology is "magnetic electricity", which is simply installed on the charging device and mobile phone equipmentThe two "magnetic devices" sense each other and form an electric current. At present, products supporting wireless charging have appeared in mobile phones, electric vehicles, smart furniture and other fields. Among them, in the mobile phone industry, the "Qi standard" is the most common, and Qi labels are often used in the packaging of many mobile phones and wireless chargers.
Smaller internal conduction resistance of components Wireless charging coil gain System wireless charging coil gain has a high conversion efficiency. The selection of components such as triode with small internal resistance wireless charging coil gain can greatly improve the efficiency of wireless charging. However, with low internal resistance, the cost will be relatively high. The transmitting end and the receiving end cannot match in time, resulting in loss, which affects the speed of wireless charging. The power output of the transmitting end will be adjusted flexibly according to the receiving end, and too much transmitting power will produce too much power loss when matching with the receiving end.
Charging method Wireless charging coil gain : The wireless charger should first iPhoThe ne is loaded into the charging protective case, and then the protective case is placed on the induction base, and then the induction base is connected to the power plug, and the power plug is plugged in. Connect peripherals Wireless charging coil gain : The iPhone connects peripherals in wireless charging mode, one is to take out the iPhone loaded into the charging protection case, the second is to connect Mini USB, and finally Mini USB connects to the peripheral.
GND is ground. The common negative electrode. This stuff improves efficiency. One, coil material. Second line structure, due to the high frequency of the presence of skinThe effective conductive area of the effect decreases. 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.
Protect the phone: The Apple 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.