Views: 22 Author: Site Editor Publish Time: 2022-01-21 Origin: Site
Due to the popularity of Magsafe, the word wireless charging has gradually entered people's lives. So what is the working principle of the wireless charging module, and why can it be wirelessly charged? This article will give you information about how wireless charging works. Wireless charging is to realize the energy transmission between the power supply and the electrical equipment in a non-contact wireless way. The existing wireless charging technologies include electromagnetic induction, magnetic resonance, radio wave, ultrasonic, infrared laser, and electric field coupling. The most widely used wireless charging technology is electromagnetic induction, which has the advantages of high conversion efficiency and short-distance charging. The principle of electromagnetic induction technology is that a changing current flows through the coil to generate a changing magnetic field. The adjacent paired coils are coupled to generate a corresponding voltage for charging.
When current passes through the coil, a magnetic field is generated, and when the magnetic flux of the closed-circuit changes, an induced electromotive force is generated. Wireless charging is such a process. The charging base is responsible for turning the current into a magnetic field, and it is a constantly changing magnetic field. There is a coil under the back cover of the mobile phone. Because the magnetic field of the base is constantly changing, the magnetic flux in the coil is also constantly changing, generating an induced electromotive force for charging. By the way, metal has the effect of electromagnetic shielding, so the mobile phone with a metal body does not have wireless charging. So the current back cover for wireless charging is either glass or ceramic and plastic. The under-table qi charger uses the non-metallic desktop and qi wireless charger module to charge the mobile phone.
With the continuous development of wireless charging technology, several other wireless charging methods are gradually being developed. But at present, electromagnetic induction wireless charging is still the most cost-effective option, and the charging effect is better. Shortly, we may significantly develop magnetic resonance technology.