Research On Compensation Topology Of ICPT System Based On Class-E Inversion

The convenient,safe and efficient use of electrical energy has always been an important business for the electrical engineering community and the entire society.The use of electrical equipment to obtain electrical energy from the grid is always achieved through certain access methods.The convenient,safe and efficient use of electrical energy has always been an important business for the electrical engineering community and the entire society.As a new type of power transmission method,ICPT technology has important research value and broad application prospects.In this paper,for the problems of large loss,poor reliability and poor stability caused by load changes in the existing compensation topology,the original and secondary asymmetric compensation topology is proposed,so that the system can achieve constant current output over a wide load range.Based on the analysis of the composition and principle of the ICPT system,the principle of the class-E power amplifier and the influencing factors of the efficiency are analyzed.The method for parameter adjustment of the soft-switch is obtained and verified by Saber.By studying the S/S,S/P and S/LCC compensation topology,the circuit characteristics and parameter design expressions of the three compensation methods are obtained.Based on the mutual inductance equivalence theory,the circuit model of S/S and S/LCC compensation ICPT system is established,and the parameter conditions that can make the system have constant output characteristics are deduced.The influence of parasitic resistance on the constant current characteristics of the system output is studied.Using Matlab to analyze the working efficiency of class-E inverter topology,the influence of frequency and coupling coefficient on efficiency is obtained,which provides a theoretical basis for the optimization of system parameters.The ICPT system with series and LCC compensation topology is adopted for the secondary side of the system.The equivalent circuit and related parameters areanalyzed.It is concluded that the real part of the input impedance of the primary coil and the coupling coefficient are restrained to ensure the efficient operation of the system.In order to reduce the effect of skin effect and core loss on transmission efciency,a non-magnetic core planar ring-shaped loosely coupled transformer wound with Litz wire was designed.Based on the advantage of LCC compensation topology resonant network,a synchronous rectifier drive control circuit is designed to ensure the overall efficiency of the system.The prototype of class-E inverter ICPT system was developed and an experimental platform was built.The relevant parameters were tested and analyzed.The experimental results show that the output current can be kept constant when the load resistance changes within a wide range.The experiment verifies the correctness of the theoretical analysis and the feasibility of circuit design.