Wireless electric energy transmission system and driving coil configuration method based on distance adaptation

Abstract

The invention provides a wireless electric energy transmission system and a driving coil configuration method based on distance adaptation, and relates to the technical field of wireless electric energy transmission. The wireless electric energy transmission system comprises a high-frequency driving power supply, a driving coil group, a transmitting coil, a receiving coil and a load coil group; the driving coil group comprises n parallel driving coils which adopt non-coaxial structures and are positioned on the same plane; the load coil group and the driving coil group are fully symmetrical; and the transmitting coil and the receiving coil are fully symmetrical. By taking the system as the basis, a condition satisfied by the maximum transmission efficiency under different transmission distances is determined, and then the condition is converted into an implicit expression function of the driving coil radius so as to obtain the optimal radius, inductance and series compensation capacitance. The wireless electric energy transmission system provided by the invention adopts the non-coaxial driving coil group, so that portability of a wireless electric energy transmission apparatus is realized and system loss is effectively lowered; and by virtue of the driving coil configuration method based on distance adaptation, it is ensured that the system still can perform wireless electric energy transmission at the maximum efficiency when the transmission distances are changed.

Description

technical field [0001] The present invention relates to the technical field of wireless power transmission, in particular to a wireless power transmission system and a distance-adaptive-based driving coil configuration method. Background technique [0002] In recent years, due to the prominent problems of sparks easily generated by the contact line of the traditional wired power transmission system and the conductors are easily worn out, people pay more and more attention to the research of wireless power transmission technology. The application range of this technology is also from small mobile devices to industrial fields. Keep widening. In 2007, MIT scientists achieved a new breakthrough in wireless power transmission technology, and found that magnetic coupling resonance technology can effectively improve the transmission distance and power of wireless power, and successfully lit a lamp 2 meters away in the experiment. 60 watt light bulb. Since then, magnetic coupling ...

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Problems solved by technology

But no matter what kind of structure, when the transmission distance changes, the coupling between the coils will also change, causing the system to appear frequency splitting phenomenon, and the occurrence of frequency splitting phenomenon will make the transmission efficiency of the system drop sharply

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