greatly increases the charging distance, and the maximum charging distance can reach 35mm, easily realizing the convenience brought by wireless. The application of this solution can realize the wireless charging transmitter products placed on the desktop (non-metal or magnetic conductive material) below, mobile phones, laptops and other Qi standard equipment placed on the desktop, can be wireless charging/power supply.
If the vivo mobile phone is used, wireless charging is also known as inductive charging or non-contact inductive charging, based on the principle of electromagnetic induction, the device that needs to be charged can be charged by contacting the wireless charger after being energized.
Real wireless charging technologyThe current principle is electromagnetic induction, magnetic resonance, radio wave and so on. Electromagnetic induction type primary coil a certain frequency of alternating current, through electromagnetic induction in the secondary coil to produce a certain current, thereby transferring energy from the transmission end to the receiving end.
However, the efficiency can not reach 100%, the transmission distance is not far, generally not more than 25 cm, the farther the efficiency is lower, at 5 cm away the distance efficiency may not exceed 50%.
Wireless charging methods include electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, wireless charging of mobile phones is mostly electromagneticThe induction principle. 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.
Wireless charging technology Wireless Charge How far patent applications can be traced back to 1891, by Nikola TeslaPut forward. The core of this technology is to establish wireless energy transmission between the charger and the device through the principle of electromagnetic induction or magnetic resonance, instead of directly powering the device through physical lines. Tesla's wireless charging research laid the foundation for later wireless charging technology.
And now, the Japanese media has brought more exciting news Wireless charging how far : a remote charging technology based on radio waves is gradually becoming practical in Japan, its principle is similar to Wi-Fi, can be 10 meters away for robots, electronic price tags and smart phones and other devices to provide powerHow far can you reach?The core magnetic resonance medium and long distance wireless charging developed by Spurotin can successfully achieve wireless charging within one meter.
Currently known reports, the farthest distance is 10 meters, using electromagnetic wave technology. The existing wireless charging technology uses magnetic field, electromagnetic wave, laser, ultrasonic and other energy transfer media. The 10-meter technology mentioned above, which uses electromagnetic waves as a medium, remains in the laboratory stage. At present, the commercial technology on the market is mainly magnetic field as the medium, which is divided into magnetic induction and magnetic resonance 2 technologies.
In fact, the current technology can achieve effective power transmission in the range of 3 to 4 feet, but this needs to be verified by the relevant organization. I believe that in the next 5 to 10 years, or even sooner, long-distance wireless charging will enter everyone's life.
Short charging distance: At present, the effective charging distance of wireless charging of standard mobile phones is about 10mm, so the wireless chargers on the market generally need to put the mobile phone on the wireless charging board and align the position to work effectively. At present, the charging distance of magnetic resonance is about 5~10cm, and the charging distance of electromagnetic wave is about 10 m.In short, the further the charging distance, the lower the charging efficiency.
Currently known reports, the farthest distance is 10 meters, using electromagnetic wave technology. The existing wireless charging technology uses magnetic field, electromagnetic wave, laser, ultrasonic and other energy transfer media. The 10-meter technology mentioned above, which uses electromagnetic waves as a medium, remains in the laboratory stage. At present, the commercial technology on the market is mainly magnetic field as the medium, which is divided into magnetic induction and magnetic resonance 2 technologies.
The core magnetic resonance medium and long distance wireless charging developed by Spurotin can successfully achieve wireless charging within one meter.
Generally about 0.9-2 meters high-power wireless charging transmission distance up to 5 meters wireless charging technology can be divided into low-power wireless charging and high-power wireless charging two ways. Low-power wireless charging often uses electromagnetic induction, such as the Qi method of charging mobile phones, but ZTE's electric vehicle wireless charging method uses induction.
WattUp Mid Fie, developed by SAN Jose startup EnergousThe ld transmitter is a long-range wireless charging system that can charge devices up to 3 feet away. This is a significant improvement over current smartphone wireless chargers, which require the device to be in direct contact with the charger, limiting utility.