The study based on new resonant topology of wireless power transfer system

This paper proposes a new complex resonant topology of wireless power transfer system, which still get better transmission performance in far distance. First, the circuit structure is theoretical analyzed based on LCL type complex resonant topology in the receiver, the reflective impedance, the load power and transmission efficiency and other expressions are deduced. The simulation model is constructed by MATLAB and compared with traditional series resonant structure. Simulation and experimental data show that the proposed structure improves the quality factor Q value and the transmission efficiency can reach more than eighty percent which up to ninety-five percent at low degree of coupling coefficient, and reduces the current flowing through the switch more than fifty percent in order to achieve the lower conduction loss; in the case of long-range and low coupling coefficient, get better transmission performance.