Research On Improved Pulse Injection Wireless Energy Transfer Technology Based On MPC

In recent years,inductive wireless power transfer(IPT)technology has received extensive attention and research,as one of the three ways of wireless energy transfer,The technology transmits electricity and signals through non-mechanical contact,Avoid the traditional energy transmission process of electric sparks,aging wear and other security issues,And maintenance is more convenient.so in the electric vehicle,industrial production process,electronic communication products and other fields of attention.In this paper,the topology and control methods of inductive coupled wireless energy transmission system are studied.At present,the research of IPT technology is mature and has been applied in many fields,but there are still some shortcomings in this technology.Inductive coupled wireless energy transmission system switch frequency is generally higher,too large switch loss will cause the overall efficiency of the system to decline,and the high operating frequency for the switching tube and topology requirements will be increased accordingly,resulting in the technology in the high power energy transmission by a lot of limitations.In addition,the IPT system as a highorder nonlinear system,the conventional control method is difficult to respond quickly when the system parameters change,resulting in the system not meeting the output requirements.In view of the above problems,this paper draws on the principle of pulse switching.An improved pulse-injected wireless energy transmission system is proposed.The topology transmits energy through discrete energy injection.The switching frequency of the system is much lower than the resonant frequency,and the switching frequency is completely decoupled from the load state and the size of the injected energy,which greatly reduces the switching loss.The launch end adopts AC-AC structure,and the topology eliminates the rectifier filtering link before the inverter,optimizing the cost and volume of the system.In addition,this paper analyzes the compensation network and applies the better performance LCL-S compensation network.In the control of IPT system,the moving dispersed control set model predictive control is introduced into the IPT system.Through the comparison analysis with the traditional control method,it is concluded that this control method can guarantee the efficiency of the system output while improving the stability and dynamic performance of the system.Finally,the topology and control method of the improved pulse-injected IPT system are further verified by the simulation and the establishment of the experimental platform.At the same time,in order to simulate the charging mode of constant current voltage in the battery charging process,a variable load is introduced in the experiment instead of the battery equivalent resistance.