Three-coil WPT system efficiency optimization method based on relay coil position adjustment

The invention relates to the technical field of wireless power transmission (WPT), and particularly discloses a three-coil WPT system efficiency optimization method based on relay coil position adjusting.The three-coil WPT system efficiency optimization method based on relay coil position adjustingcomprises the steps that firstly, according to the influence of a relay coil on the system transmission efficiency, the relay coil position is adjusted according to the influence of the relay coil on the system transmission efficiency; and determining the optimal position of the relay coil according to the change condition of the system transmission efficiency along with the load resistance at different relay coil positions. And secondly, by analyzing the influence of different relay coil positions on the frequency characteristics of the system, the working frequency of the system is optimized, so that the three-coil WPT system works at the zero phase angle frequency, and the transmission performance of the system i