Repeating coil design method for three coil structure middle distance wireless energy transmission system

The invention discloses a repeating coil design method for a three coil structure middle distance wireless energy transmission system, comprising steps of setting a transmission distance for the middle distance wireless energy transmission system, calculating load power and integral efficiency of the three coil type wireless energy transmission system containing the repeating coil and maximized power or the impedance condition when the efficiency is output, establishing an efficacy integration target function with the practical power and efficiency need as optimization goals, determining a restriction condition of the middle distance wireless energy transmission system according to a practical application index, and finally determining the repeating coil optimization parameters when the optimization goal is achieved.