| Due to the popularity of mobile electronic products,the traditional wired power transmission method is limited in many application scenarios.The wireless power transmission method makes up for the shortcomings of the wired power transmission method.It has developed rapidly in recent years and has been widely used in various fields of production and life.The transmission efficiency of the wireless power transmission system is also a topic that is currently the focus of this technology,and the transmission efficiency directly determines the transmission performance of the wireless power transmission system.This paper takes the magnetic coupling resonant wireless power transmission technology as the research object,starts from the compensation topology and the optimization of transmission efficiency,and uses the improved bat algorithm(LBA)based on Lévy flight to improve the transmission efficiency of the system.Firstly,this paper introduces the working principle of the magnetically coupled resonant wireless power transfer system,analyzes the internal energy conversion process of the dual-coil lossless system with coupled mode theory,and then analyzes four basic compensation topologies with circuit theory.Due to the defects of the basic compensation topology,two kinds of composite compensation topologies with LCC type at the transmitter are studied.Through the derivation of the circuit theoretical expression and the simulation analysis of the transmission performance using MATLAB software,the resonant frequency,mutual inductance and load resistance are obtained.The influence curve of output power and transmission efficiency,compare the transmission performance simulation results of the two composite compensation topologies,summarize different transmission characteristics,and consider the better transmission performance,choose LCC-S type compensation topology for more in-depth research work.Secondly,in terms of the transmission efficiency optimization of LCC-S type compensation topology,the bat algorithm is introduced,and an improved bat algorithm based on Lévy flight is proposed for the shortcomings of the bat algorithm.The three parameters of resonance frequency,mutual inductance and load resistance are analyzed.The variables are comprehensively optimized,and the optimal parameter variable values under the state of the highest transmission efficiency of the system are obtained,and the optimization results show that the improved bat algorithm has better optimization effect.Finally,in order to verify the optimization results of the improved bat algorithm,the overall design of the circuit hardware structure was carried out by selecting various components suitable for the system,and a set of magnetic coupling resonant wireless power transmission experimental platform was built.The experimental verification of the unilateral and comprehensive effects of the load resistance and the load resistance on the transmission efficiency verifies the correctness of the optimization results,indicating that the improved bat algorithm is feasible for the transmission efficiency optimization of the magnetic coupling resonant wireless power transmission system.Figure [42] Table [8] Reference [82]... |
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