In the early test of wireless charging buses in South Korea, it was found that the distance between the two is more than 1CM, the power transmission is only 80%, and if the distance is 12CM, the power transmission is only 60%. If you can transmit power over a longer distance and can transmit more power, it is necessary to talk about another medium-range wireless charging technology, which can transmit energy over a longer distance.
Not just Japan, alreadyAt the end of last year, Stellantis, the world's fourth largest automobile manufacturer, announced on its official website that their innovative dynamic induction charging technology has proved successful after years of research and months of testing, and the road "Arena del Futuro" for car wireless charging testing was officially opened. So now wireless charging technology is also a very hot ranks.
Wireless charger can be plugged into the power supply, the wireless charger is designed to be easy to use, but if the user does not use the wireless charger to charge, it is bestIs to choose to turn off the power. Wireless charging technology comes from radio energy transmission technology, which can be divided into two ways: low-power wireless charging and high-power wireless charging.
Electric vehicle wireless charging technology transmits electric energy in the form of high-frequency alternating magnetic field through the power supply guide rail buried under the ground to the electric energy picking mechanism running in a certain range of the receiving end of the vehicle, and then supplies power to the vehicle energy storage equipment. When charging begins, the power transmitter PTx generates an alternating current through its coils, which creates an alternating magnetic field according to Faraday's Law.
Wireless charging methods include electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, etc. Wireless charging of mobile phones mostly uses the principle of electromagnetic induction. 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 principle of wireless charging: electromagnetic induction. Charging dock and cell phoneWhen the two terminals are close, the generator coil generates a certain current in the mobile phone receiving coil based on a certain frequency of alternating current through electromagnetic induction, thereby transferring the point energy from the originating end to the receiving end, and then begins to supply power to the mobile phone from the charging seat. Magnetic resonance.
Electromagnetic induction: The fundamental principle is to use the principle of electromagnetic induction, similar to a transformer, the primary coil of a certain frequency of alternating current, through electromagnetic induction in the secondary coil to produce a certain current, thereby transferring the energy from the transmission end to the receiving end. The conversion efficiency is high, the cost is cheap, but the transmission distance is short, and it is easy to be affected by the placement.
Wireless charging mainly uses electromagnetic induction, magnetic field resonance, radio waves, electric field coupling and other principles. Wireless charging Because the charger and the electrical device transmit energy by magnetic field, the two are not connected by wires, so the charger and the electrical device can be no conductive contact exposed.
At present, wireless charging on the market belongs to near-field magnetic coupling wireless energy transmission, which realizes energy transfer between power supply and electrical equipment with the help of magnetic field, an invisible medium in space. This approach is considered correctIt's harmless to humans, but it has to be done up close.
has been realized, Apple iPhone 8/8 Plus/X is also a very mature Qi wireless charging technology, in fact, this wireless charging is not the real sense of "wireless", it still needs a base connected to the charging line, and the difference between wired charging is that there is no need to charge the interface. You can charge your phone directly by placing it on the charging dock.
Last year, two important events occurred in the wireless charging market. First, the Samsung Galaxy S6/S6 Edge has built-in wireless charging,It is expected to add 50 million mobile phones that support wireless charging. Second, the Apple Watch also has a built-in wireless charging function, which indicates that the huge wearable device market is developing towards wireless charging. Wireless charging technology has been developing in the market for many years and has been lukewarm.
OPPO Ace infinity new machine shock release, leading the global wireless charging new era/OPPO official announced that the new machine OPPO Ace infinity equipped with the world's first FreeVOOC space charging technology, to achieve an unprecedented 5-10WStable charging power, even if the phone distance reaches an amazing 10 meters, the power can keep up in real time, and truly realize the convenient experience of where the phone is and where the charge is.
Say goodbye to the charging pile, how far is the wireless charging car from us? In our basic understanding, cars need fuel to run smoothly. However, with the development of technology, electric vehicle charging is wireless, making the concept of wireless charging cars possible. Perhaps wireless charging is not surprising for electronic products such as mobile phones, computers, cameras, but for the electric vehicle industry, it may be the key to start the entire market. <