Research On Modeling And Parameter Optimization For A New Type Of Wireless Power Transmission System Via Magnetic Resonance

As a new type of electric energy transmission,wireless power transmission is a frontier technology in the field of electrical engineering,as well as a revolutionary progress in power transmission and access.It effectively solves the problem of convenient and safe access of electric energy,avoids the problems such as electric spark,carbon deposition,poor maintainability,easy abrasion,etc.,which are brought by the traditional direct contact power supply mode,and solves the problem of safe hidden trouble of electricity consumption under special environment.In recent years,with the rapid development of the technology of magnetic coupling resonance wireless power transmission,the technology has been applied in the field of home appliances,electric vehicles and medical fields.However,the transmission efficiency is still a very important index which restricts its development and popularization.It is an urgent problem that how to effectively improve the system transmission efficiency.In this paper,the most promising magnetic coupling resonance wireless energy transfer technology is chosen as the research object.Based on the structure of the traditional wireless power transmission system,we propose the new three coils system model,which adopts the single coil as the transmitting coil and two paralleled resonant coils as the receiving coil.For the wireless power transmission efficiency,we firstly adopte equivalent circuit theory to analyze the two different wireless power transmission systems,derive its expression by using Kirchhoff law,and find that the key influencing factors is the transmission distance,working frequency and load resistance.Secondly,we use the control variable method to analyze the influence of the coil distance,frequency and load resistance on the transmission efficiency of the two systems.Then,based on chaos particle swarm optimization,we carry out the overall optimization of the parameters,and get the optimal parameter values corresponding the highest transmission efficiency,so as to make guidance for the experiment.Finally,in order to verify the correctness of the model and theoretical analysis,we build two experimental platforms of wireless power transmission,and analyze the relationship between transmission efficiency and distance,frequency and load resistance by experiments.Under the same parameters,we find that the transmission efficiency of the improved wireless power transmission system is higher than traditional's,which verifies the correctness of theoretical analysis.