Research On The Optimization Of The Space Position Of The Magnetically-Coupled Resonant Wireless Power Transfer Coil On The Spatial Scale

Magnetically Coupled Resonant Wireless Power transfer(MCR-WPT)technology has the advantages of long transmission distance,high output power,and high transmission efficiency.It has quickly become a research hotspot in the field of wireless power transmission.MCR-WPT technology has been deeply applied in electric vehicles,smart homes,medical equipment,industrial applications,rail transit and other fields with its characteristics of flexibility,safety,reliability,and convenience.It has important academic research value and broad market application prospects.The transmitting coil and the receiving coil of the traditional WPT system are in relatively fixed spatial positions.The offset of the coils on the spatial scale causes the transmission performance of the WPT system to decline rapidly,which greatly affects the use of transmission equipment.A method for optimizing the spatial position of the MCR-WPT coils is proposed to solve the problem of insufficient transmission performance of the MCR-WPT system on the spatial scale.The spatial position of the relay coil and the receiving coil are fine-tuned through the proposed angular deflection algorithm,which effectively improves the transmission characteristics of the MCR-WPT system.The main research contents of this paper are as follows:A.A hierarchical solution is proposed to optimize the output power and improve the transmission efficiency of the MCR-WPT system.Firstly,the situation of coil parameters are analyzed,which provides a basis of parameter selection for MCR-WPT system modeling and analysis.Secondly,the MCR-WPT system is modeled and analyzed based on coupled mode theory and circuit theory.The relationship expressions between the system transmission characteristics and related parameters are deduced.Quantitative analysis of the various parameters in the relational expression,the best coupling coefficient and the best load resistance of the MCR-WPT system are deduced by the method of maximum value derivation.Finally,the simulations results verify the relationship between the system parameters and the optimal transmission characteristics of the MCR-WPT system.B.An optimized mehtod for the coil angle deflection is proposed to solve the problem of insufficient transmission performance of the MCR-WPT system on the spatial scale.The method of fine-tuning the angle of the receiving coil through the proposed angle deflection optimization algorithm can effectively improve the transmission characteristics of the system.Firstly,several common spatial scale states of MCR-WPT system are introduced.The variation characteristics of coil mutual inductance under various spatial scales are analyzed.Secondly,the spatial position of coils under the optimal transmission state of the MCR-WPT system is solved.Finally,the optimized coil space position is simulated and experimentally verified.The results show that the receiving coil optimized for angular deflection can significantly improve the transmission characteristics of the MCR-WPT system.C.A method of adding relay coils on the space scale is proposed to solve the insufficient transmission performance of the MCR-WPT system in the medium and long distances,based on the optimization of the angle deflection.Firstly,the MCR-WPT system with relay coils is modeled and analyzed.The optimal output power and parameter conditions of the optimal transmission efficiency are deduced.Secondly,the influence of the spatial position of the relay coil on the transmission characteristics of the MCR-WPT system is analyzed.The spatial position of the relay coil under the best transmission characteristics of the system is found.Finally the optimized relay coil spatial position is simulated and experimentally verified.The results show that the relay coil after fine-tuning the spatial position can significantly improve the transmission characteristics of the MCR-WPT system.