Research And Optimization Of Compensation Network For Electric Field Resonance Wireless Power Transfer System

Electric-field coupled power transfer(ECPT)technology is a wireless energy transmission technology that utilizes a high-frequency electric field as an energy transmission medium.The coupling mechanism of the ECPT system is generally composed of several aluminum plates,and thus has the advantages of low cost,portability and lightness.Since the electric field acts as a medium for transmitting energy,the ECPT technology also has the advantages of no eddy current loss and good electromagnetic compatibility.The advantages based on ECPT technology are numerous.Therefore,the technology has been widely studied and paid attention by scholars at home and abroad,and has achieved research results in many fields.This technology provides a new way for wireless energy transmission,further expanding the research field of wireless energy transmission technology and promoting advances in theory and technology related to wireless energy transmission.In this paper,the new ECPT structure proposed by Associate Professor Li Siqi of Kunming University of Science and Technology is analyzed and studied.The new ECPT system is optimized by applying circuit theory,power electronics technology and mathematical method.The optimization goal is to reduce the reactive power loss of the system.Improve the transmission efficiency of the system to ensure that the ECPT system has better working performance during operation.The main research work includes:(1)Through a large number of literatures,we have learned about the domestic and international research of ECPT technology.In particular,the new ECPT system proposed by Associate Professor Li Siqi of Kunming University of Science and Technology was studied.Based on the circuit theory,the working principle of the system and the relationship between the resonant parameters are analyzed,and the parameter relationships are expressed by the corresponding equations.(2)The compensation network of the new ECPT system is analyzed.The goal is to reduce the reactive power loss of the ECPT system by optimizing the resonant network parameters and improve the system transmission efficiency.The transmission efficiency of the system is expressed by the formula,and it is deduced and simplified,and the mathematical value is used to find the maximum value,so as to obtain the resonance parameter relationship that satisfies the optimal transmission efficiency of the system.(3)The electric field simulation model of the coupler is built by Maxwell,and the electric field safety around the coupling capacitor of the ECPT system is analyzed.According to the optimization theory,the resonance parameters are calculated.By using LT-spice to build the circuit model,the optimized resonant parameters and unoptimized resonant parameters are simulated separately,and the simulation results are compared to verify that the optimization theory is correct and feasible.(4)Set up the experimental platform,using the chip capacitor,Litz wire,PVC pipe,etc.to allocate the required resonant capacitor and resonant inductance parameters.Experiments were performed on the two sets of parameters.Obtain experimental waveforms and experimental related data with an oscilloscope,power analyzer,etc.The experimental results are compared to verify the feasibility of the optimization theory.