Study on impedance matching of magnetic coupled resonant wireless energy transmission

In view of the characteristics that the transmission efficiency varies with the matching impedance in the process of radio power transmission, and that the output power of power source is maximized and the output efficiency is the highest, two methods of impedance matching are proposed,One is based on the stepper motor through the detection network, control network algorithm to achieve impedance matching, the other is based on Cuk circuit impedance matching method. Matching between load and coil by embedding single-phase bridge rectifier circuit and Buck-Boost step-up and step-down transformer. According to the maximum transmission power theory, the impedance value of the regulating circuit is quantitatively analyzed to improve the efficiency of the system in the transmission process. The validity of the two impedance matching design schemes is verified on MATLAB/Simulink platform. The results show that the impedance matching method based on stepping motor and Cuk circuit can achieve the best impedance matching and maximize the transmission power of radio energy.