A Self-Oscillating Resonant Converter with Precise Output Voltage Control

This paper proposes an improved self-oscillation resonant converter with precise output voltage control. By introducing additional output voltage feedback into the self-oscillation control loop, a rapid and precise regulation of output voltage is achieved. An integrated four coil transformer is proposed for wireless power transfer, current sensing and signal feedback. To regulate the output voltage, PI controller is used to adjust the phase difference of transfer impedance. The proposed control concept is verified by simulation and experimental results.