1, 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.
2, the distance of the wireless charger can only be effective within the coil range of the charger, more thanThe distance can not receive charging, each manufacturer's product is different, can not be universal.
3, generally about 0.9-2 meters high-power wireless charging transmission distance up to 5 meters wireless charging technology can be divided into low-power wireless charging and high-power 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.
Wireless charging, is originally much slower than wired charging. Wireless charging sells convenience, not charging speed. Moreover, the charging speed is directly related to the power consumption of the phone. The fastest way to charge is in flight or offline mode. If you are connected to WiFi, playing games, and then using wireless charging, obviously the charging speed will be very slowA lot.
The voltage of the wireless charger will not be too stable, and the voltage to be generated will be smaller with the transmission distance, the current will be small, and the charging will be slow. But it's safer than some wires.
Low efficiency: energy storage and transmission efficiency is not as good as real contact. Slow charging speed: Due to low efficiency, the charging speed is slow at the same input power. Although wireless charging can be unplugged, the distance between the phone and the charger is very small. However, the electromagnetic energy loss is still not small, and the power received by the general mobile phone is about 75% of the power sent by the charger.
missingOne drawback of wireless chargers is that the charging speed is relatively slow, and most wireless chargers only support 5W or 5W charging power. In addition, mobile phones need to maintain certain rules when using wireless chargers to charge, otherwise there may be charging problems. How to maintain the iPhone daily: Choose a toughened film and cover for your phone, which can greatly prevent phone falls.
The disadvantage of WiFi wireless charging technology is that it is slow to charge, and this WiFi wireless charging has not been widely popularized, and to use WiFi wireless charging, the premise is that the mobile phone must be supportedHold, and WiFi should also be upgraded firmware.
The basic principle of wireless charging is to convert the current into a magnetic field, which 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.
The principle of wireless charging: electricityMagnetic 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.
Wireless charging, also known as inductive charging, non-contact inductive charging, from wireless power transmission technology, is the use of near-field induction, that is, inductive coupling, by the power supply device (charger) to transmit energy to the power device, the device uses the received energy to charge the battery, and at the same time for its own transportFor use.
Wireless charging principle is mainly electromagnetic induction and wireless electromagnetic wave technology. The principle of electromagnetic induction is the basis of wireless charging. Electromagnetic induction occurs when a magnetic field is generated between a charger and a mobile device. The alternating current generated at the charger end will create eddy currents in the magnetic field, and the receiving coil at the mobile device end will sense this eddy currents. In this way, power is transferred from the charger to the mobile device.
Wireless charging, also known as inductive charging or non-contact inductive charging, based on the principle of electromagnetic induction, does not need to be transmitted like the traditional wired charger