Description
Drawing electricity from the air and electromagnetic inductionworking principlePhysicists have long known that when two resonant frequencies are the sameEnergy can be efficiently transferred between objects of different frequencies, while the interaction between objects of different frequencies is weak.This is why a singer's singing can shatter one of the bottles containing different amounts of water without affecting the other bottles. This is just like when we are on a swing, we only need to sit on it and let our drooping legs swing synchronously to bring power to the swing. Wireless power extraction technology takes advantage of this principle. Similarly, wireless power technology also applies the principle of electromagnetic wave induction and related AC induction technology. Corresponding coils are used at the sending and receiving ends to send and receive induced AC signals for charging. The user only needs Place the charging device on a "tablet" to charge.Wireless charger schematic diagramThe wireless charging system mainly uses the principle of electromagnetic induction to achieve energy transfer through energy coupling through coils. When the system is working, the input terminal will be powered by direct current. Coupling energy through two inductors, the current output by the secondary coil is converted into direct current by the receiving conversion circuit to power the LED lamp.A changing magnetic field will produce a changing electric field, and a changing electric field will produce a changing magnetic field, the size of which is related to their rate of change. The rate of change of a sine function is another sine function, so electromagnetic waves can spread out, and the induced voltage The generation of is related to the change of magnetic flux, so the changing magnetic field inside the coil generates an induced voltage, thereby completing the power extraction process.main feature1. Theoretically speaking, wireless charging technology affects the human body. The resonance principle used in wireless charging is magnetic field resonance, which only transmits between coils that resonate at the same frequency, while other devices cannot accept the wave band. In addition, the wireless charging technology uses The magnetic field itself is harmful to the human body. But wireless charging technology is a new charging technology after all. As for wireless chargers, many people are worried that wireless charging technology will be like when Wi-Fi and mobile phone antenna poles first appeared. In fact, the technology itself is.2. Wireless charging technology uses magnetic resonance to transmit electrical energy in the electric and magnetic fields between the charger and the device, and the coils and capacitors form resonance between the charger and the device.
Thank you for reading this post, don't forget to subscribe!
