A Parallel Transmission Method of Power and Data in WPT System Based on Data Transmission of Single Capacitor Plate

In recent years, wireless power transfer (WPT) technology has been gradually applied in various fields. In the process of wireless charging, due to the randomness of the position of the secondary side and the randomness of the received power level by the secondary side, the WPT system is required to determine the charging state through information exchange. In this paper, a power and data parallel transfer technology for wireless power transfer based on hybrid electric field coupling and magnetic field coupling is proposed, which effectively utilizes the advantages of magnetic field coupling to easily realize high-power and long-distance wireless power transfer and the advantages of electric field coupling and electric field concentration to improve the system. By using this structure with a single capacitive pole plate to transmit the signal, the data transmission is almost independent of the power magnetic field and the output voltage is controlled by the closed loop of the data transmission channel, allowing for stable power transmission.