This paper presents the frequency and driving voltage control based on PID controller for wireless power transmission system to restrain the influence of external disturbance and the movement of receiver coil. The phase difference of the voltage and current of the resonant tank is used by the frequency controller to control the frequency of DDS signal source to match the resonant frequency. The received voltage is detected wirelessly by the driving voltage controller to control the output voltage of switching power source to match the power need of the receiver. The experiment platform was built to verify the performance of the controllers. The results show that both controllers could operate normally to improve the stability and safety of the WPT system.
Shao Q,Fang XL,Liu H,et al. Optimization based on frequency and driving voltage control for wireless power transmission system[C]//International Informatization and Engineering Associations; Aljabal Algharby University; Azad University of Quchan; National Institute of Technology Rourkela; University Polytechnic of Bucharest. Zurich-Durnten, Switzerland:Trans Tech Publications,2013:603-606.