Design of wireless power supply system for the portable mobile device

This paper illustrates a model of magnetic resonance coupled wireless power transfer(WPT) system with the set-distance and series-series capacitance compensation structure, optimizing the design of the transmission device and realizing the design of a small power rectifier regulator system. This wireless power supply system can achieve a stable DC power supply sufficient to support a 20W mobile T V. By adopting the topology of non-controlled rectifier and the flyback converter, the rectifier regulator system can achieve regulated output through voltage feedback. Over-voltage protection and output voltage filtering are also added to the system to improve stability. Finally, aiming at solving the problem of the drift of resonant frequency in the debugging process, two solutions are provided. By adjusting the frequency or the power of the supply power and setting the input voltage of the flyback converter as the feedback signal, both solutions can meet the power stability demand of the mobile TV.