Multi-Receiver Solenoid Wireless Charging System With Load Isolation Characteristic

Magnetic Coupling Resonance Wireless Power Transfer(MCR-WPT)technology is a new way that breaks the traditional bondage of wire.It has the characteristics of long distance and high security.It is used more and more in social life,such as medical,transportation and smart home.The main content of this paper is to propose a new type of slot solenoid-type wireless power transfer system,and introduces the characteristics and performance of the system.The main research contents of this paper are as follows:(1)Introduce the theory of MCR-WPT in three mainstream researches.The concepts and calculation methods of system parameters such as coil mutual inductance,quality factor and coupling coefficient are introduced in detail.(2)A system structure using a solenoid coil as a relay coil is proposed.The advantages of the structure relative to the single-relay single-load structure and the domino structure are described.The magnetic field of the slot-type solenoid coil is theoretically analyzed.(3)Using the K-converter principle and the uniform distribution of the magnetic field of the solenoid coil,a new type of slot-type solenoid-type load-independent output voltage wireless power transfer system is designed.The overall structure and circuit model of the system are described.Briefly explain and use ADS to simulate the voltage of the four loads and the transmission efficiency of the entire system.(4)According to the experimental requirements and simulation data,select components,build an experimental platform consisting of a slot-type solenoid coil and four load-receiving coils,and use four different loads for multiple comparison experiments to verify the theory.Finally achieved the expected goal.