Carding 4 Carders
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Aalto University scientists are rewriting the rules of wireless charging.
Engineers from Aalto University have developed an improved method for long-term wireless charging. By improving the interaction between transmitting and receiving antennas and using the phenomenon of "radiation suppression", they have expanded our theoretical understanding of wireless power transmission beyond traditional inductive methods.
Efficiency over long distances
Charging over short distances, such as through induction pads, uses magnetic fields to transfer energy with high efficiency. However, over long distances, the efficiency decreases dramatically. New research has shown that high efficiency can be maintained over long distances by suppressing the radiation resistance of loop antennas that transmit and receive energy.
Previously, the same lab created an omnidirectional wireless charging system that allows you to charge devices in any position. Now, researchers have presented a new dynamic theory of wireless charging that considers both near-and long-range transmission conditions. They showed that a high transmission efficiency of more than 80% can be achieved over distances about five times the size of the antenna.
"We wanted to transfer energy efficiently, taking into account radiation losses over long distances," says lead author Nam Ha - Wan. "It turned out that with equal amplitudes and opposite phases of currents in loop antennas, we can compensate for radiation losses, thereby increasing efficiency."
A universal approach to evaluating wireless power transmission
Scientists have developed a method for analyzing any wireless power transmission system, whether mathematical or experimental. This allows a more thorough assessment of the efficiency of energy transfer over different distances. Research by Ha-Wan and his colleagues may take into account obstacles that can interfere with charging.
"We tried to figure out the optimal configuration for wireless power transmission," says Ha - Wan. "With our approach, we can extend the transmission distance beyond traditional wireless charging systems, while maintaining high efficiency."
Engineers from Aalto University have developed an improved method for long-term wireless charging. By improving the interaction between transmitting and receiving antennas and using the phenomenon of "radiation suppression", they have expanded our theoretical understanding of wireless power transmission beyond traditional inductive methods.
Efficiency over long distances
Charging over short distances, such as through induction pads, uses magnetic fields to transfer energy with high efficiency. However, over long distances, the efficiency decreases dramatically. New research has shown that high efficiency can be maintained over long distances by suppressing the radiation resistance of loop antennas that transmit and receive energy.
Previously, the same lab created an omnidirectional wireless charging system that allows you to charge devices in any position. Now, researchers have presented a new dynamic theory of wireless charging that considers both near-and long-range transmission conditions. They showed that a high transmission efficiency of more than 80% can be achieved over distances about five times the size of the antenna.
"We wanted to transfer energy efficiently, taking into account radiation losses over long distances," says lead author Nam Ha - Wan. "It turned out that with equal amplitudes and opposite phases of currents in loop antennas, we can compensate for radiation losses, thereby increasing efficiency."
A universal approach to evaluating wireless power transmission
Scientists have developed a method for analyzing any wireless power transmission system, whether mathematical or experimental. This allows a more thorough assessment of the efficiency of energy transfer over different distances. Research by Ha-Wan and his colleagues may take into account obstacles that can interfere with charging.
"We tried to figure out the optimal configuration for wireless power transmission," says Ha - Wan. "With our approach, we can extend the transmission distance beyond traditional wireless charging systems, while maintaining high efficiency."
