A Switched Series-Series Compensated Active Clamped Inverter with Interoperable Power Level Capability for Wireless Charging Systems

Due to the bifurcation phenomenon in inductive power transfer (IPT)-based wireless charging systems, the same transmitter cannot charge the electric vehicle (EV) at different charging power levels. Consequently, the design of battery chargers with varying power levels is required, raising the infrastructure cost. This article introduces an interoperable IPT system for multi-power level wireless charging that consists of an active clamped inverter (ACI) and a tapping-based transmitter coil with switched series-series compensation. The implementation methodology of the proposed IPT configuration to avoid the bifurcation phenomenon is discussed in detail. The finite element analysis of the proposed tapping-based coil is simulated at 3.3 kW (level-1) and 6.6 kW (level-2) in ANSYS-Maxwell software. The proposed IPT system for multi-power level charging is validated through MATLAB simulation studies.