In order to further study the resonant wireless power transfer (RWPT) technology, according to the transmission principle of RWPT technology, a wireless charging mode based on the series to series (SS) structure is proposed. By calculating the related parameters of series resonance and parallel resonant equivalent circuit, it is found that the series resonant circuit has the maximum induction electromotive force. Then, combining the four topologies of SS, SP, PS, PP and the calculation formula of compensation capacitor, it is determined that the series resonant circuit is most suitable for the transmitter of the system. In order to facilitate the analysis and calculation, this study finally selected the series to series (SS) structure for research. Furthermore, according to the Kirchhoff Law and the requirement of vibration coupling, the expressions of the system load power and the system energy utilization are derived. Finally, the current technical difficulties are analyzed.

Resonant Wireless Power Transfer (RWPT) is free from wired transmission. It has also realized long-distance power transmission, which has become one of the hotspots at home and abroad. Based on the existing research foundation, this paper focuses on the analysis of the inverter module, rectifier module and resonant coupling module from the components of RWPT. Further, PSpice simulation is used to analyze the IR2110 driving circuit and the transmission process of the whole system. Finally, a RWPT system is set up to explore the feasibility and effectiveness of theoretical analysis and practical experiments.