The Modeling Analysis of Wireless Power Transmission Under the Basic Topology Structure

As it seeks to explore the magnetic coupling resonance wireless power transmission system, the mutual inductance coupling theory of space four air-core coil and equivalent circuit were used to analyze output power and transmission efficiency of wireless power system. Then, equivalent circuit of transmitter series and receiver series compensation structure was achieved. Accordingly, output power and transmission efficiency of this structure were further obtained and they were stimulated using MATLAB simulation software. Thus, the relationship among resonance angular frequency and output power or transmission efficiency was revealed. Three other compensation circuit structures were discussed separately and their expressions of output power and transmission efficiency were obtained. Finally, the simulation is respectively carried out under the condition that all parameters are the same and their performance is compared and analyzed. The analysis of different compensation circuits can provide useful reference for the design of wireless charging system structure.