Simulation And Experimental Study Of Wireless Power Transmission System Based On Magnetic Resonance Coupling

With the development of the electromagnetic theory, power electronics,materials science, power conversion and control technology, there hasbeen increasing more and more attention to the application of wireless powertransmission, and will gradually become a reality. Wireless power transmission doesnot have wire connection, which is a safe and reliable way of new power transmission.In2007MIT lighted up a60W bulb within the2m range which was based onmagnetic resonance coupling wireless power transmission theory. So far the wirelesspower transmission technology has been rapidly becoming a research hotspot in theworld.This paper introduces the basic resonant electromagnetic coupling theory,discusses the fundamental principle of electromagnetic resonant coupling wirelesstransmission, analyzes the characteristic of electromagnetic coupling and couplingresonance. Using Matlab simulation software simulates and analyzes the relationshipamong power distribution, system structure and coil parameters, obtained the optimalmodel structure of a two-coil system, and simulation results show that reducing thenumber of the fixed inductor coil turns, increasing coil radius is beneficial to increasethe transmission distance. Then by used ANSYS finite element simulation software,quantitatively analyzes the coupled magnetic resonant magnetic coupling wirelesspower transmission system of the two coils, three coils and four coils, obtained thespatial distribution characteristics of the magnetic flux density, and according to thecharacteristics of different structural models of the system are compared, using therepeating coil improves the system transmission distance, reveals the influencemechanism of repeating coil in different conditions on coupling field of the system.Finally, through experimental device designed, the paper measures experimentaldata of the power transmission of different system models that verifies the correctness of theoretical analysis and numerical simulation. From the theoretical analysis,simulation, experimental verification, the paper comprehensively analyzes thetransmission distance, transmission power and the structure optimization design ofelectromagnetic coupling resonant wireless power transmission system, whichprovides an important reference data for the development of power modules.