Signal and Power Synchronous Transmission in WPT System Based on Capacitance Modulation

[摘要] In inductive coupled power transmission system, at the same time of power transmission, signal transmission is necessary in order to realize the closed-loop control. Synchronous transmission of power and signal has advantages of high speed and stability. By using the method of capacitance modulation via changing capacitance, the working state of the resonator changes. The voltage across the coil appears certain changes. After step-down divider, demodulation, filtering, comparison and a series of signal processing, the transmitting signal will reproduce. The simulation and experiments show that the scheme is correct, the signal can be sent and extracted correctly, and the effect of power transmission is small. The synchronous transmission of signal in wireless power transmission system is realized.

[发布机构] School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin, China^1

[效力级别] 电工学

[关键词] Capacitance modulation;Closed-loop control;Coupled power;Signal transmission;Synchronous transmission;Transmitting signal;Wireless power transmission systems;Working state