Wireless charging of Apple mobile phones uses the principle of electromagnetic induction. What is the principle of wireless charging for Apple mobile phones? The principle of wireless charging technology is actually the principle of electromagnetic induction. Children who have learned high school physics, I believe that everyone is very clear that electromagnetic waves have energy, can be obtained through the electromagnetic coil, and then the coil will form a current, and finally through the integration of the circuit can be charged.
Above yesSchematic diagram, the principle used is the principle of electromagnetic induction.
First of all, you need to have an APPLE mobile phone that supports unlimited charging, such as iPhone X, iPhone8 plus, etc. Then you need to buy wireless chargers from formal channels, and it is recommended to buy them from Apple official dealers. Then power on the wireless charger, make sure there are no magnetic objects around before connecting the power. Then place it in a flat place to prevent the phone from slipping off it.
Electromagnetic induction, magnetic field resonance, electric field coupling wireless charging to charge the mobile phone principle. nowMost of the wireless charging on the market uses electromagnetic induction, which is a widely used technology. The efficiency of charging is very fast. Many of the original accessories of the electronics factory are using this principle, and now we see that most of the Apple mobile phones on the market have this function.
The principle of wireless charging is through the principle of electromagnetic induction, when the power supply current through the coil will produce a magnetic field. When the electric coil of the mobile phone is close to the magnetic field, it generates an electric current, thus realizing wireless charging. Wireless charging lets you get rid of the cable while charging your phone. Now the batteries on Apple's mobile phones are lithium batteries that do not have a memory effect. Wireless chargingIn the mobile phone wireless charging power is so small '> Why the current mobile phone wireless charging power is so small First of all, the efficiency of wireless charging technology is too low, high-power application, efficiency is a very important problem, such as the charger output a total of 100J of energy, but finally received only 50J, then 50% of the energy is wasted. The current efficiency of wireless charging technology is about so much, so it is unlikely to be used in high power anytime soon.
2, low. Wireless mobile power charging wattage is small, power this is determined by the internal circuit, wantLarge, you have to change the internal device, transformer, control IC, output components also need to change the larger current. 3, the power of wireless charging now reaches more than 50 watts is still very few, because wireless charging and space charging is not the same, wireless charging is just to cancel the line, you put the phone on the dedicated wireless charger, it can be charged, but to tell the truth now on the market different charging technology, its charging technology is not the same, Even if it is a high charging power, it is not necessarily faster than a low charging power, which contains a lot of water.
4, slow charging speed: sinceAfter the explosion of Samsung Note 7, the wireless charging power of mobile phones has been castrated by manufacturers. Apple for the first time in the iPhone 8 series of mobile phones with wireless charging, but the charging power is only 5W. In contrast, the wireless charging power of Samsung mobile phones, although larger, is only 15W. Small charging power means that the charging speed will be slower.
5, low charging efficiency Since it is for mobile phone charging, charging speed is of course the first, even if you can do the application of "wireless", but for the most basic requirements of charging speed can not be reached, then the experience will probably be a discount. <6, because the wireless transmission power is small, restricting the development of NFC wireless charging, so the existing NFC wireless charging power is only 1W. At present, smart phones are basically useful fast charging technology, wired fast charging is small 18W, large 50W power, and wireless charging can reach 30W, NFC is far from meeting the charging requirements of mobile phones. NFC wireless charging is not to charge the mobile phone, which has little impact on mobile phone charging.
The Ministry of Industry and Information Technology stipulates that the power of wireless fast charge wireless charge ultra-small must be less than 50 watts Wireless charge ultra-small , there are such requirements why they are not clear, but they know that the power of this charge is not because of radiation, Because radiation is everywhere, all the time, not all radiation will affect the human body.
First of all, the back hand can help children develop a kind of wireless charge from ultra-small My ability to control, which is very important for their future growth. In kindergarten, children often need to wash their own hands, dress, eat, etc., which they need to do on their own, and the back of the hand can help them better focus and master their behavior. Secondly, the back of the hand can also help children avoid accidentally getting food or other items on their face or mouth while eating.
To be precise, split sales, standard change separate retail, this is illegal, because this makes the commodity can not achieve its normal use, only have wireless charging super small Make adjustments and Settings in the image-image. If you are not clear, you can communicate with me further. Thank you for adopting. Slightly slower charging speed: compared with wired charging treasure, even with fast charging, wireless charging treasure charging speedIt will be slightly slower, especially for devices with large capacity batteries, and the charging time is longer. Compatibility limitations: Wireless charging bank requires devices to support Qi or other wireless charging standards, and devices that do not support wireless charging technology cannot enjoy its convenience. Apple cable charge well. The advantage of the magnetic magnet is that it can be adsorbated near, and the adsorption can be charged. The charger is automatically aligned with the position of the charging coil, which solves the problem of manual alignment for traditional wireless charging. But it is still a wired form, and the power is not as good as wired charging, so the key moment or wired charging is more realistic. If MagSafe magneticIf you want to become a regular charger, it depends on when the iPhone cancels the charging port. The second kind of wireless charging, its working principle is the most used electromagnetic induction, wireless charging less line bondage, each charge on the go, compared with wired charging, it does not plug and unplug the data cable cumbersome, so charging is more safe, more fast, its disadvantage is that the charge is relatively slow. The biggest difference is that the charging method is not the same. The traditional charging bank charges the mobile phone, basically through the wire transmission, charging speed is faster; When charging a mobile phone with a wireless charger, there is no need to unplug the cableBut at a slower speed. Wireless chargers do not need wire transmission, mobile phones need wireless charging function has become a trend, the wide use of wireless charging can make our mobile phone life more convenient. What is the difference between wireless charging and wired charging bank? Although both are used to charge devices such as smartphones, there are some differences. Simply put, wireless charging is more convenient, does not require wire entanglement, can remove the trouble of wire; The wired charging treasure is faster in charging speed, such as the Secretary-General is a wired charging treasure, which supports PD two-way fast charging, and the charging speed is faster than the general product. What is the difference between wireless charging and wired charging bank? Which is better?