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Method for optimizing efficiency of magnetically coupled resonant wireless energy transmission system during deviation of coil

A resonant radio and transmission system technology, applied in the direction of electrical components, circuit devices, etc., can solve the problems of not being too large, the influence of the transmission medium, and the decrease of transmission efficiency, and achieve the effect of expanding the application environment and optimizing the transmission efficiency

Inactive Publication Date: 2019-10-15
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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Problems solved by technology

[0003] Microwave wireless power transmission: This technology has the advantages of high power density and good orientation, and is suitable for long-distance transmission. However, due to the high frequency and small wavelength of microwaves, it is difficult to pass through obstacles and is easily affected by the transmission medium. In addition, Its transmission efficiency is greatly affected by factors such as weather and terrain, especially the high-energy electromagnetic waves emitted by the system have a greater impact on the surrounding environment
[0004] Electromagnetic induction wireless power transmission: This technology has high transmission power and high transmission efficiency. However, due to the electromagnetic coupling between the primary and secondary coils, the distance between the two coils should not be too large, generally at the millimeter level. When the distance between the coils increases The transmission efficiency will drop sharply

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  • Method for optimizing efficiency of magnetically coupled resonant wireless energy transmission system during deviation of coil
  • Method for optimizing efficiency of magnetically coupled resonant wireless energy transmission system during deviation of coil
  • Method for optimizing efficiency of magnetically coupled resonant wireless energy transmission system during deviation of coil

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Embodiment example 1

[0073] Implementation case 1: In this implementation case, the magnetically coupled resonant wireless power transmission system consists of a signal generator, a power amplifier, a DC power supply, a transmitting coil, a receiving coil, and a load. Both the transmitting coil and the receiving coil are made of copper wire with a diameter of 2 mm, a radius of 0.1 m, and a number of turns of 10. The signal generator, power amplifier and DC power supply are combined into a high frequency power supply. The load is an RF resistance box with a resistance of 50Ω. By increasing the compensation capacitor, the resonance frequency of the system is 6MHz. During the implementation, the axial distance between the coils is controlled at d=0.15m.

[0074] Assume that the initial angular offsets between the coils are 30°, 40°, 50°, 60°, 70°, 80°, and 90° respectively, and the initial radial offsets between the coils are 0.01m. When optimizing in this implementation case The adjustment range o...

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Abstract

In view of the problem that a magnetically coupled resonant wireless energy transmission system is greatly reduced in transmission efficiency when suffering from coil deviation, and that in the practical application of the magnetically coupled resonant wireless energy transmission system, it is harsh to completely align the coil, and especially in special fields such as medical implantation, household appliances, underground coal mines and the like, it is almost impossible to completely align the coil, the invention provides a method for optimizing the efficiency of the magnetically coupled resonant wireless energy transmission system during the deviation of a coil. The method divides the deviation between the coils into radial deviation and angular deviation, optimizes the transmission efficiency by adjusting the angular deviation between the coils when the radial deviation occurs between the coils of the magnetically coupled resonant wireless energy transmission system, and optimizesthe transmission efficiency by adjusting the radial deviation between the coils when the deviation occurs between the coils. The method can be applied to the magnetically coupled resonant wireless energy transmission system in which a coil deviates, can well optimize the transmission efficiency of the system and meets the power supply stability of the device.

Description

technical field [0001] The invention belongs to the technical field of magnetic coupling resonance wireless power transmission, and relates to a method for optimizing the efficiency of a magnetic coupling resonance wireless power transmission system, in particular to a method suitable for optimizing the efficiency of a magnetic coupling resonance wireless power transmission system when the coil is offset. Methods. Background technique [0002] More than a century ago, Tesla proposed the theory of wireless energy transmission and conducted a large number of experiments, but due to various reasons, no breakthroughs were made. Until 2007, the research team of the Massachusetts Institute of Technology proposed the theory of magnetically coupled resonant wireless power transfer, and used this technology to light up a 60-watt light bulb 2m away with an efficiency of 40%. With the introduction of magnetic coupling resonance technology, the research on wireless power transmission t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/12H02J50/90
CPCH02J50/12H02J50/90
Inventor 高鹏飞田晓盈耿盛涛朱亚丽张元东
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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