The reason why mobile phones can realize wireless charging is achieved by means of electromagnetic induction, radio waves, magnetic field resonance and electric field coupling. The different methods are based on different relevant principles, and the details are as follows.
Electromagnetic induction wireless charging principle
This wireless charging method is relatively popular in the current market, and the principle of wireless charging depends entirely on the effective conversion of magnetic energy and electrical energy. During the charging process, the wireless charging device can directly generate magnetic flux through the induction magnet at both ends, and then use the linear change of the magnetic flux to generate the required power, and finally collect the electric energy through the device to charge the mobile phone.
From the point of view of the charging principle of this method, not only is the entire operation relatively simple, but it can also easily achieve lightweight and wide-ranging use. Including the relatively low cost, it is widely used in the market and can be liked by many consumers.
Principle of radio wave charging
Some friends may have heard about radio waves. After all, radio waves are not a new black technology, and they have been used in our country for a long time. When the wireless charging device is in use, it directly sends out radio waves and provides an applicable voltage through the DC voltage regulator device at the receiving end of the mobile phone to meet the needs of related equipment. From the point of view of this wireless charging method, it has the advantages of stable transmission, safety and reliability. Because the wireless charging device is equipped with a voltage regulating device, it has good performance in voltage stability and safety performance.
Magnetic field resonance wireless charging principle
The principle of this method may be easier to understand, after all, it has been introduced in junior high school or high school physics. The specific principle is that the two ends of the wireless charging device can generate the same frequency magnetic field through the resonator to realize the purpose of generating electric energy through resonance and charging the mobile phone. From the point of view of the charging principle, in addition to the advantage of longer wireless transmission distance, it also has the advantage of easy manufacturing of equipment and devices. Just because the wireless charging efficiency is relatively poor, it is gradually replaced by other wireless charging methods in the mobile phone market.
Principle of Electric Field Coupling Wireless Charging
This wireless charging method is also widely used in the market now. The principle is that two sets of symmetrical electric dipoles are equipped on the mobile phone and the charging device. Once the two devices are in direct proximity, a current is generated between the two sets of symmetrical electric dipoles for charging. It is precisely because of the configuration of electric dipoles in this way that the wireless charging efficiency is very high. It’s just that the two pairs of electric dipoles can only be used close to each other, so the disadvantage is that there is a distance limitation, which cannot meet the wireless long-distance charging, and even the wireless charging equipment used is relatively large in size, so as to meet the purpose of high-efficiency charging.