Research On Load-isolation Resonant Multi-receiver Wireless Charging System

The idea of designing a convenient household charging platform is increasingly becoming a concern as a large number of consumer electronics are produced and integrated into everyday life.As a fresh and emerging technology,the wireless power transfer(WPT)has garnered considerable research attention.Magnetic resonant WPT(MCR-WPT)can be utilized to meet several of these needs by virtue of its safety,neatness,mid-range transfer,and high-efficiency.With this technology,the charging platform can wirelessly power multiple household appliances such as mobile devices and laptops.The multi-receiver WPT system has remarkable potential as an innovative,highly effective charging platform.The main content of this paper is to research on the load-isolation Resonant Wireless Charging System for Multi-receiver and this article includes the following works:(1)Three analysis theories of WPT system are introduced—coupled mode theory,filter theory and circuit theory.(2)The theories of frequency splitting,maximum power transfer principle and maximum energy efficiency principle in WPT system are introduced.(3)According to the circuit theory,the illustration is given to the load-isolation scheme with K-inverter and an extendible load-isolation wireless charging platform for multi-receiver is proposed.Comparing with the related research results,the advantages of the system in this paper are presented.And the wireless power transfer system using Helmholtz coil for multi-receiver is studied.(4)The load-isolation scheme with K-inverter is stated theoretically and verified experimentally.Experimental results are in agreement with the theory very well.