Proposal of Simplified Transfer Function Model for Dynamic Rectified DC Voltage in DWPT

In this paper, two modeling methods for an electric circuit of dynamic wireless power transfer(DWPT), which has a rectifier and coupling coefficient changing with time between coils under the ground and on a vehicle, are proposed. The proposed models can calculate output voltage with errors less than 1 % compared to that of the circuit simulator. Moreover, one of the proposed methods can calculate output voltage in more than twenty times as quick as the circuit simulator. In addition, it is revealed that the output voltage of the DWPT system behaves definitely differently depending on the capacity of a smoothing capacitor of the rectifier.