Design And Optimization Of Wireless Power Transfer System Via Magnetic Resonance Coupling

Wireless power transmission technology has fond ways to supply power for application which are not suitable for towing wires,many revolutions have achieved in the field of high energy efficiency and high power transmission.Wireless power transfer is a way of energy transmission between power supply and load with non-contact way.In many WPT technologies,magnetically-coupled resonant WPT has many advantages which has a good prospect of development,it’s very important for wireless power transmission system to design and optimization the system.In this paper,the magnetic resonance principle of WPT is described in detail.The mechanism of WPT is deeply studied based on the theory of coupled mode theory and mutual inductance theory.Serial resonant-serial resonant,serial resonant-parallel resonant,parallel resonant-serial resonant and parallel resonant-parallel resonant compensation structures are analyzed by simulation which based on the theory of circuit mutual inductance.The new topology of secondary LCL and the influence of metal obstacles in WPT system are analyzed in detail.The wireless power transfer system is designed,which include the part of DC power source,the high frequency inverter,coil’s production and optimization,control link,driver circuit,protection circuit and foreign object detection system.The experimental platform is stable.And then the experiment that the influence of metal obstacles in WPT system is conducted.The impact on the wireless power transmission system from the chopper output voltage,transmission distance,resonant frequency and metal obstacles is analyzed through a large number of data.And then the correctness of the theoretical analysis is proved.