Wireless electric energy transmission system based on three resonance coils and transmission method of wireless electric energy transmission system

A wireless power transmission and resonant coil technology, applied in circuit devices, electrical components, etc., can solve the problems of circuit occupying space and increasing power loss, and achieve the effects of small standby power loss, reduced energy radiation, and strong robustness.
CN110289698APending Publication Date: 2019-09-27TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TONGJI UNIV
Publication Date
2019-09-27

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Abstract

The invention provides a wireless electric energy transmission system based on three resonance coils and a transmission method of the wireless electric energy transmission system. The wireless electric energy transmission system comprises a non-resonance source coil, a transmitting coil, a relay coil, a receiving coil and a non-resonance load coil, wherein the transmitting coil, the relay coil and the receiving coil have the same resonance frequency. Regulation and control of coil resonant frequency is realized by a pair of resonant coils formed by winding wires on the side surface of an insulating non-magnetic material frame in multiple turns and loading capacitors, and the coil resonant frequency is regulated and controlled by utilizing space symmetry-based resonance coils. Due to the physical properties of the three resonance coils based on parity-time symmetry, the working frequency of the system is located at the resonance frequency of the resonance coils. Compared with a traditional WPT system, the system has the advantages of slow transmission efficiency reduction, higher robustness and small standby power loss, and is capable of reducing energy radiation of the system to the surroundings at the resonant frequency under the same condition. In addition, the system has high robustness even if a receiving part is miniaturized under a certain transmission distance; and a plurality of miniaturized receiving parts which do not influence each other can be charged with different efficiencies at the same time.
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Description

technical field

[0001] The present invention relates to the technical field of wireless power transmission, in particular to a system and a transmission method for wireless power transmission using multiple (three or more) non-radiative magnetic coupling coils. Background technique

[0002] Traditional portable electrical equipment often uses wired charging, so it is necessary to leave a charging interface on the portable electrical equipment, so that the power supply and charging device cannot be sealed, affecting the waterproof and dustproof level of the device and reducing reliability. In order to solve the aforementioned problems, in recent years, the technology of wireless power transmission has been continuously developed and promoted in the fields of portable mobile devices and electric vehicles. Charging: Compared with traditional wired charging, wireless charging is small in size, high in portability, and strong in compatibility. It is also beneficial to the waterpr...

Claims

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