Within 1 meter! New wireless transmission system enables efficient power transmission
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The United Kingdom's "Nature" magazine released a new research report on physics on the 13th, saying that the U.S. scientific research team has used the principle of parity-time symmetry (PT symmetry) to create a wireless power transmission system that is different in a range of 1 meter. Distance can achieve efficient power transmission. In experiments, LED lights can be successfully charged away from the power supply.
The development of wireless power transmission technology will lay the foundation for a variety of applications in today's society, such as the charging of implantable medical devices and the wireless charging of stationary electric vehicles. However, it is not easy to create a system that is not affected by changes in operating conditions. For example, it is difficult to do without being restricted by the distance between the power supply and the wireless power receiving device; at the same time, if the power transmission efficiency is stable, There are bigger challenges.
This time, the wireless power transmission system created by Fan Yu, a professor of electronic engineering at Stanford University, and colleagues, can realize efficient power transmission at different distances within a range of 1 meter. The system is made using the parity-time symmetry principle. Parity-time symmetry is a concept in quantum mechanics that describes the basic theory of motion of microscopic objects. In general, symmetry in physics refers to the intrinsic invariance of a system under specific transformations, and the parity-time symmetry Invariance under spatial reflection and time inversion. The team made use of this principle to create a system that can maintain constant power transmission efficiency within a range of approximately 1 meter.
The research team used LED lights for test experiments. The result shows that the LED lamp can receive electricity and can be far away from the power supply—until the demarcation point is about 1 meter, and the brightness has remained unchanged during this process.
In corresponding news and commentary articles, the French scientific research center and the scientist of the Higher Institute of Physical and Chemical Engineering in Paris, Jeffrey Rosse, said that this latest discovery is expected to be used to charge mobile devices or vehicles that transmit continuously in varying distances and directions. . (Reporter Zhang Mengran)
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