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Korean scientists have developed a wireless charging gadget that works at a distance
Engineers from the Korean leading scientific and technological institute (Korea Advanced Institute of Science and Technology, KAIST) работают on the task wireless charging of mobile devices. The developed system of wireless power transmission (wireless-power transfer, WPT) is able to charge multiple devices simultaneously. At the same gadgets do not need lean against or put anywhere - charging runs at a distance of half a meter.
At the moment, mobile device manufacturers agreed on the introduction of a standard wireless charging Qi (Chi). It is developed by the Consortium wireless electromagnetic energy (Wireless Power Consortium, WPC) for induction of energy transfer at a distance of 4 cm. Using this charging device is to be placed on the plate of the transmitter. Charging occurs through induction energy transfer. He has already been used by companies such as Asus, HTC, Huawei, LG Electronics, Motorola Mobility, Nokia, Samsung, Sony, Yota Devices.
Korean scientists have also experimented with a relatively "long-range" energy transfer. In the past year they have system at a distance of 5 meters. The receiver was fairly large, it represented an three-meter block section of 10 × 20 cm - but the power of the transmitted energy reached 1, 4 kW (up to 3 m).
The prototype receiver i>
The design is called "system of dipole resonance coils» (Dipole Coil Resonance System, DCRS). Despite its size, it has turned out much more compact system of wireless transmission of energy, which in 2007 tried to do at MIT. The American system is called "resonance coupled system of magnets» (Coupled Magnetic Resonance System, CMRS), and worked at distances up to 2 m. In this case, for her work was needed high frequency (10 MHz). Korea and the device operates at low frequencies.
For transmission over a distance up to half of the energy required to charge one or more mobile devices, the receiver may produce a much smaller size. The transmitter is the size of 1 m 2 sup> is able to charge 30 smartphones or laptops 5 simultaneously, they may be located in any position at a distance of 50 cm from the transmitter. The efficiency of energy transfer reaches 34%. The system meets the safety requirements of the magnetic field, which set the maximum allowed in 27μT.
Source: geektimes.ru/post/253166/
At the moment, mobile device manufacturers agreed on the introduction of a standard wireless charging Qi (Chi). It is developed by the Consortium wireless electromagnetic energy (Wireless Power Consortium, WPC) for induction of energy transfer at a distance of 4 cm. Using this charging device is to be placed on the plate of the transmitter. Charging occurs through induction energy transfer. He has already been used by companies such as Asus, HTC, Huawei, LG Electronics, Motorola Mobility, Nokia, Samsung, Sony, Yota Devices.
Korean scientists have also experimented with a relatively "long-range" energy transfer. In the past year they have system at a distance of 5 meters. The receiver was fairly large, it represented an three-meter block section of 10 × 20 cm - but the power of the transmitted energy reached 1, 4 kW (up to 3 m).
The prototype receiver i>
The design is called "system of dipole resonance coils» (Dipole Coil Resonance System, DCRS). Despite its size, it has turned out much more compact system of wireless transmission of energy, which in 2007 tried to do at MIT. The American system is called "resonance coupled system of magnets» (Coupled Magnetic Resonance System, CMRS), and worked at distances up to 2 m. In this case, for her work was needed high frequency (10 MHz). Korea and the device operates at low frequencies.
For transmission over a distance up to half of the energy required to charge one or more mobile devices, the receiver may produce a much smaller size. The transmitter is the size of 1 m 2 sup> is able to charge 30 smartphones or laptops 5 simultaneously, they may be located in any position at a distance of 50 cm from the transmitter. The efficiency of energy transfer reaches 34%. The system meets the safety requirements of the magnetic field, which set the maximum allowed in 27μT.
Source: geektimes.ru/post/253166/
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