Resonant wireless power transmission system capable of automatically performing frequency conversion and resonance matching

Abstract

Provided is a resonant wireless power transmission system capable of automatically performing frequency conversion and resonance matching. An isolation power group of an energy emission end of the resonant wireless power transmission system provides power for a high-frequency signal generation unit, a high-frequency driving unit and a main circuit power amplification unit in a control circuit. The high-frequency signal generation unit of a signal generation unit is connected with a signal isolation unit connected with the high-frequency driving unit, and the high-frequency driving unit is connected with a frequency conversion and power amplification unit connected with an electric control switch group. The electric control switch group is connected with a first matching capacitor group (Ct) connected with an emission coil, the first matching capacitor group (Ct) and the emission coil form a resonant emission circuit, and an enabling control unit is connected with the high-frequency signal generation unit and the electric control switch group at the same time. A receiving coil group of an energy receiving end is connected with a second matching capacitor group (Cr), the receiving coil group and the second matching capacitor group (Cr) form a resonant receiving circuit, and power is supplied to a working load through frequency regulation.

Description

technical field [0001] The invention relates to a resonant wireless power transmission system with automatic frequency conversion and resonant matching. Background technique [0002] Wireless power transmission technology is a power transmission technology that supports load equipment to obtain power from a power source in a non-contact manner. Wireless power transmission technology can effectively overcome the problems of poor mobile flexibility of line power supply, occupying volume space, easy to generate contact sparks, exposed cables and cable joints, and wear and tear of moving contact surfaces, etc., and improve the safety of power supply and consumption systems , reliability and service life. It is especially suitable for safe power supply of mobile equipment, flammable and explosive environments, and underwater and oil and gas downhole equipment. It has great scientific significance and practical value for the development of electromagnetic theory and power supply ...

AI Technical Summary

Problems solved by technology

Due to the research on wireless power transmission, the frequency range used is relatively wide, and the traditional wireless transmission technology has not yet achieved a wide range of applications. In order to facilitate the expansion of the application range of wireless power transmission technology, it is necessary to improve the wireless power supply technology. Therefore, for The performance of energy transmitting and receiving devices puts forward higher requirements. How to use a single energy transmitting terminal to achieve wide-frequency high-power transmission, and flexibly adjust the resonant frequency, automatically realize frequency conversion and automatic matching of resonant units, and achieve high efficiency at the same time Energy transmission is an urgent problem to be solved in wireless energy transmission

[0006] At present, most of the wireless power transmission devices reported in patent and non-patent literature use manual replacement of frequency conversion and resonance matching to change the resonance matching unit; some patents mention the method of using stepping motors for impedance matching, which is complex and inflexible in structure; There is also a method of using a switch to control the transmitting end or the receiving end. This method has not yet realized the unified automatic control of the signal generating unit and the resonance matching unit.

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