Design of GaN-device-based Constant-current Circuit for Wireless Power Transmission
In order to improve the efficiency of wireless power transmission(WPT)system,by utilizing the advantage of low switching loss of GaN devices compared with traditional silicon(Si)devices,the present work proposed a design method of load-independent constant-current output circuit of LCL-LCC inductive coupled power transmission(ICPT)system based on GaN devices.It first established the mutual inductance model of LCL-LCC compensation circuit,derived prerequisitesfor system zero phase angle(ZPA)operation and load-independent constant-current output,and put forward the parameter configuration method and design flow for optimizing the primary compensation inductance.The inverter bridge can realize zero voltage switching(ZVS)by slightly adjusting the secondary compensation capacitance.Finally an experimental platform was built to verify the feasibility of the theoretical circuit design,showing that the system efficiency based on GaN platform is significantly higher than that based on Si platform for different loads.
GaN deviceICPTconstant-current output circuitzero-voltage switch
万方数据
维普
