Transmission Line Model of 3-coil WPT Systems

This paper proposes a method to represent 3-coil wireless power transfer (WPT) system consisting of transmitter (TX), receiver (RX) and repeater (RP) by equivalent transmission line model. The method is based on matrix reduction technic, in which the impedance matrix dimension of any cascade WPT systems can be reduced to 2×2. The system is designed to operate at 13.56MHz. The proposed method provides a better understanding of the 3-coil WPT system under the scope of nominal T transmission line model.