Magnetic-resonance wireless power transmission system and impedance matching method thereof
A technology of wireless power transmission and impedance matching, applied in the direction of electromagnetic wave system, etc., can solve the problem of system transmission power drop, achieve the effect of improving transmission power and efficiency, and improving the adjustment range
Inactive Publication Date: 2015-10-21
CHINA UNIV OF MINING & TECH (BEIJING)
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[0010] Technical problem: The purpose of the present invention is to solve the problem that the transmission power of the system decreases as the relative position of the transceiver coil changes in the magnetic coupling resonance wireless power transmission system. From the perspective of impedance matching, a magnetic resonance with automatic impedance matching function is proposed. Wireless Power Transfer System
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[0040] In order to make the content and advantages of the technical solution of the present invention more clear, the magnetic resonance wireless power transmission system capable of automatic impedance matching of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0041] see figure 1 The magnetic resonance wireless power transmission system and method capable of automatic impedance matching described in the present invention include an AC power supply, an automatic impedance matching module and a magnetic resonance wireless power transmission module. The magnetic resonance wireless power transmission module is composed of a transmitting coil at a transmitting end and a receiving coil at a receiving end, and the automatic impedance matching module is connected to the transmitting end of the magnetic resonance wireless transmission module. The AC power supply provides power to the system.
[0042] The automatic impe...
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The invention discloses a magnetic-resonance wireless power transmission system and an impedance matching method thereof in the field of wireless power transmission, and mainly provides a solution to the problem that the transmission performance of a magnetic-resonance wireless power transmission system drastically decreases as the relative position of a receiving end and a transmitting end changes. The system is mainly composed of three parts: an alternating-current power source, an automatic impedance matching module, and a magnetic resonance wireless power transmission module. The alternating-current power source provides power for the system. The automatic impedance matching module is composed of a reflection coefficient detector, a central processing unit, a motor controller, and an L-type adjustable matching circuit. The reflection coefficient detector detects the module and phase of the reflection coefficient of the power transmission module, and transmits a detection result to the central processing unit. The central processing unit processes the input of the previous level, and outputs an instruction for controlling the motor controller through an impedance matching algorithm. The motor controller receiving the instruction adjusts a variable reactance element in a matching network to realize impedance matching. The power transmission module is composed of a four-coil magnetic coupling resonance system.
Description
technical field [0001] The invention belongs to the technical field of magnetic coupling resonant wireless power transmission, and relates to a magnetic resonance wireless power transmission system capable of automatic impedance matching and an impedance matching method thereof, which is applicable to a magnetic coupling resonance wireless power transmission system with a transmitting end and a receiving end When the relative position changes, the impedance of the coupling structure also changes. 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...
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Inventor 田子建曹阳阳
Owner CHINA UNIV OF MINING & TECH (BEIJING)