Research On Key Technologies Of Magnetic Coupled Wireless Power Transfer

Due to its merits of safety,large transfer power,high transfer efficiency and long transfer distance,magnetically coupled wireless power transfer(MCPT)technology has attracted enormous attention across the research community.The application fields of MCPT technology include charging of consumer electronic devices,such as electric energy supply of medical body-embedded electronics,charging of new energy vehicles as well as some special aspects.MCPT technology is also significant due to its various outstanding properties and potential in broad practical applications.The critical research direction and challenge of MCPT technology are to achieve controllable high efficient wireless transfer of electric energy with high power in middle distance range.In this paper,the following aspects were researched in order to solve these problems.(1)Various structure models of MCPT system,influence of corresponding parameter changes on output characteristics and system efficiency were investigated,including four typical compensation structures,four coil structures and characteristics analysis of N stages LC resonant structures.(2)The properties of MCPT system with double coils capacitor strings compensation structure were studied and corresponding parameters were optimized.(3)Circuits were designed for MCPT system with double coils capacitor strings compensation structure and control schemes were proposed.Base on the above research work,controllable high efficient wireless transfer of electric energy with high power in middle distance range can be achieve by combing MCPT system circuits with double coils capacitor strings compensation structure and control scheme.This work provided a technique support in the practical application of MCPT technology.