Abstract
In this paper, we propose the system of SP-type resonant circuit with the DAB DC-DC converter for the wireless power transfer. We derive a non-tight transformer circuit and its equation, which using a coupling coefficient and turn ratio, to design for our system. By this derived circuit equation, it is also possible to derive the resonant capacitor parameters for the SP-type resonant circuit and a block diagram. This block diagram is possible simulating while varying the coupling coefficient. Also, we design that this system controls DAB DC-DC converters while synchronizing with each microcomputer. We confirm that the converter control operates normally, and it was clarified that the SP-type performs power transmission efficiency of 90% or more between two power transfer coils and that bidirectional power transmission.
