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Wireless charging is gaining momentum, you ready?
Author:管理员    Released in:2016-05-03 10:02:40    Written words:【Big】【In the】【Small
Abstract:Apple spring conference preheating news: a new generation of iPhone7 enlarge recruit or will launch wireless charging, fans don't have to worry about go out without the cable. Sounds of the cow force wireless charging technology, do you know what? Come off together!

 

Apple spring conference preheating news: a new generation of iPhone7 enlarge recruit or will launch wireless charging, fans don't have to worry about go out without the cable. Sounds of the cow force wireless charging technology, do you know what? Come off together!


Wireless charging principle


Up points, from the basic principle of wireless charging divided into two categories, to electric field coupling and magnetic coupling, the corresponding energy transmission device for the capacitance and inductance.

  

 

1, to electric field coupling


Way to electric field coupling in Japan murata produced by representative. This kind of wireless charging technology, transmitter and receiver respectively to install two (or two) independent of the capacitance plate, when the transmitter and receiver is close to plate to form the two capacitance of the two groups. Capacitance zhongtong alternating current with high frequency, high pressure, can realize the power transmission from the launch side to receiving side.


Charger or "sender" and portable devices or "receiver" is used to effectively in the right size of capacitance of vertically between the metal surface electrostatic coupling. Which drive electrode or active electrode than another little electricity, high voltage above, another electrode is passive electrode, the size is longer, the voltage is low. Transmission of energy, of course, under normal circumstances, capacitance is very small, it has much to do with the electrode area is small. Therefore, in order to meet to recharge the required power consumption equipment level (for example from 5 w to 25 w), need to increase the electrode size and coupling voltage value, depending on the actual configuration.


In order to achieve the coupling between the electrode wireless transceiver, minimize external radiation at the same time, need to be properly designed. So you need to further understand and determine the correct electrode size, their design, working voltage, power value, the best working frequency and the total size constraints. In general, the ideal frequency range between 200 KHZ to 1 MHZ, the voltage value of the effective coupling area between 800 v and 1.52 kV.


2, magnetic coupling,


The attention of mobile phone wireless charging, the electric car charging more using magnetic coupling principle design, its energy transmission medium for inductance. On the transmitter and receiver respectively installed a planar coil inductance. Launch side inductance coil used to produce magnetic field incentives, according to the law of electromagnetic induction, when receiving side coil in the magnetic field, will produce a voltage at the receiving side.


Magnetic coupling principle of wireless charging technology, closer to the conventional resonant switching power supply.


advantages


1) the use of wireless charging magnetoelectric induction device can do stealth, equipment wear rate is low, the application range is wide, public charging area area is relatively reduced, but reduce the share of the area is not too big.


2) high technical content, convenient operation, can be implemented relatively remote radio can transform, but high power wireless charging to limit the transmission distance of 5 meters, not be too far away.


3) easy to operate.


disadvantages


1) although the equipment technology content high, economic costs is higher, but equipment maintenance cost.


2) for realizing remote power wireless magnetoelectricity conversion, so the energy-consuming equipment. With the increase of the distance of wireless charging equipment and power, the busywork loss will have more.


3) wireless charging technology implementation is the secondary energy conversion equipment itself, also is the the step-down after (or directly) into direct current (dc) in a high frequency switch control communication conversion output. Because of the high power ac orthogonal to the electric current transformation is secondary sexual wireless transmission, so the electromagnetic space magnetic loss rate is too big.


The article fromhttp://www.elecfans.com/dianyuan/407735.html

 
 
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