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Variable-coupling coefficient magnetic resonance wireless power transmission system and method

A technology of wireless power transmission and coupling coefficient, applied in electromagnetic wave systems, electrical components, circuit devices, etc., can solve problems such as the decline of system transmission efficiency, and achieve the effect of improving transmission efficiency, transmission distance, and utilization efficiency.

Inactive Publication Date: 2013-11-27
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0011] Technical problem: The purpose of the present invention is to solve the problem that the transmission efficiency of the system drops sharply due to the increase of the transmission distance and the decrease of the coupling coefficient of the magnetic coupling resonance wireless power transmission system, and consider that the system achieves the maximum transmission at the critical coupling Efficiency and optimal transmission distance, proposed a variable coupling coefficient magnetic resonance wireless power transmission system and method

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  • Variable-coupling coefficient magnetic resonance wireless power transmission system and method
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Embodiment Construction

[0040] In order to make the content and advantages of the technical solution of the present invention more clear, the variable coupling coefficient magnetic resonance wireless power transmission system and method of the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0041] The implementation process of the variable coupling coefficient magnetic resonance wireless power transmission system and method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0042] figure 1 It is a schematic diagram of the system of variable coupling coefficient magnetic resonance wireless power transmission of the present invention.

[0043] Such as figure 1 As shown, the variable coupling coefficient magnetic resonance wireless power tra...

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Abstract

The invention discloses a variable-coupling coefficient magnetic resonance wireless power transmission system and a method in the technical field of magnetic coupling resonance wireless power transmission, and mainly solves the problem that the transmission efficiency of the magnetic resonance wireless power transmission system can sharply decrease as the transmission distance increases. By simultaneously adjusting the distance between a source coil and a transmitting coil and the distance between a receiving coil and a load coil, the method ensures that the magnetic resonance wireless power transmission system can meet a critical coupling condition equation and work in a critical coupling state. The invention accurately obtains conditions which need to be met by the critical coupling state of the system, so that the magnetic resonance wireless power transmission system can always work in a high-efficiency mode.

Description

technical field [0001] The invention belongs to the technical field of magnetic coupling resonance wireless power transmission, and relates to a magnetic resonance wireless power transmission system with variable coupling coefficient, in particular to a method for improving transmission efficiency by changing the coupling coefficient of a transmitter and a receiver of a magnetic coupling resonance wireless power transmission system and distance methods. Background technique [0002] Since Nikola Tesla proposed the theory of wireless power transfer a century ago, wireless power transfer has been a hot research topic. Experts at home and abroad have been conducting research on wireless power transmission for many years, but the progress of scientific research has been slow until June 2007. Marin Soljacic, a professor of physics at the Massachusetts Institute of Technology (MIT), and his team members proposed a magnetic coupling based on strong magnetic coupling. A new scheme ...

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Application Information

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IPC IPC(8): H02J17/00H02J50/12
Inventor 田子建林越
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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