| Magnetic coupling resonant wireless power transmission technology is the use of the work on the resonance frequency of the strong coupling between the two resonances for the power transmission of a new technology. Wireless power transmission is a safe, convenient power transmission method, this method does not need any physical line connection, power can be transfered to the load side at close or middle distance without contact. This based on the technology of magnetic coupling resonant wireless power transmission system can transfer power from the transmitter to the receiver without radiation effectively. Compared with the traditional induction coupling and microwave wireless energy transfer technology, magnetic coupling resonant technology has more advantages, like smaller energy loss, more stable performance, easy operation, etcIn existing technology based on magnetic coupling resonant WPT (Wireless Power Transfer) systems research, most of them are also the preliminary theoretical research, for magnetic coupling resonant transmission distance of WPT systems and related research is still rare. Therefore, this paper has carried on the theoretical analysis, simulation and experimental validation in the study on the magnetic coupling resonant WPT system within a relay coil.In this paper, the main research contents include:(1) lumped equivalent circuit model of the WPT system within a relay coil.(2) analysis system this credit conditions, and the critical frequency, maximum power transmission coupling conditions.(3) crossing coupling influence on this WPT systems, analysis on impact from repeating coil.(4) software simulation and experimental validation on the relay coil. Two ways by simulation and experiment to verify the validity and feasibility of the relay coil. As a result, WPT system intervention based on repeating coil magnetic coupling resonant has greatly increased the transmission distance and verify the feasibility of this technology, reliability and practicability. |
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