The first: electromagnetic induction wireless charging, this way of charging is the use of a wireless charging board and the induction of magnets on the mobile phone generated between the inductive magnetic flux, the magnetic force into a power, for current transmission. The circuit structure required by this charging method is relatively simple, and the cost is not too high, but this charging method also has a disadvantage, that is, the transmission distance is too short, if the location of the mobile phone is not placed, then it is likely to be unable to charge, or the charging speed is particularly slow.
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The second type: Magnetic resonance charging, the principle of this kind of charging is the need for two sides of the resonator to produce a magnetic field resonance, like the first kind, but also through the magnetic force to turn it into electricity, a charge, this way is the need to connect the two sides at the same frequency there is a sense of vibration, then you can charge, and suitable for a long distance transmission, but there are still shortcomings, That is, the efficiency of charging will be relatively low, at present, this charging method is still being studied, and it is estimated that this shortcoming can be improved before it can appear on the market.
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The third kind: Radio wave charging, this way of charging is to configure a device that can transmit radio waves on the power supply side, of course, with a transmitting device, it is necessary to have a accepting device to charge in a DC voltage output and input way, although this charging current transmission speed is fast, but the stability and security are very low. Research and development costs are also high.
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Fourth: electric field coupling wireless charging, this charging method is through the two a vertical way of asymmetric dipole to generate current transmission, this charging method conversion rate is very high, the position of the two can also not be fixed, but there is a big disadvantage, that is, the need for equipment larger volume, power is particularly small.
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Of these four charging methods, the first way is the most mature, and the wireless charging used by our mobile phones is the first way. Although it is widely used, it still needs to be improved. In addition to the shortcomings mentioned above, when using such wireless chargers, the mobile phone is still easy to get hot, which is not ideal. So now many users get this charger is nothing more than a temporary fresh, after the first charge found that it is not easy to use, after the charging time will still choose the data line charging, and give up this high-tech charging method.
Electromagnetic induction wireless charging, when the current of the power supply through the coil (wireless charger's power supply coil) will generate a magnetic field, other unenergized coil (mobile phone side of the electric coil) close to the magnetic field will generate current, charging the mobile phone
The so-called wireless charging is a technology that transmits electricity through electromagnetic fields and electromagnetic waves without any wire connection, and the breakthrough of \"wireless transmission\" technology is to find a way to \"grasp\" electromagnetic waves, that is, to use the \"resonance\" principle of physics to efficiently transmit energy to two objects with the same vibration frequency.
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The principle of wireless charging is very similar to that of a transformer, but the difference is that the primary side of the coil is separated from the secondary side, and there is no physical connection contact. When an alternating current is passed through the sending coil, this current will create an alternating magnetic field around it. Electrical energy and magnetic energy change periodically with electric and magnetic fields, and then propagate outward in the form of electromagnetic waves.
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The generation of electromagnetic waves must have an electromagnetic oscillation device, the higher the frequency of electromagnetic waves, the stronger the ability to emit electromagnetic waves.
Wireless charging relies on the propagation of radio waves in the air, which will achieve the purpose of charging
Wireless charging is also radio waves to propagate charging
Wireless charging is powered by solar energy.