Resonant wireless charging design needs more than simply an understanding of the properties of the switches. An efficient design also requires knowledge of how the magnetic system works. The central part of optimizing the wireless charging system during the design phase is applying the formula used to calculate the resistance seen by the transmitter and estimating the maximum power that can be transmitted. In addition, the coupling between the transmitter and the receiver, and the effects that the quality factors of the two coils have on the overall efficiency must be understood.
