Impedance-Model-Based Design of High-Order Class E Inverter

Class E inverters have been widely used in wireless power transfer applications. However, the load sensitivity of the inverter significantly affects the overall transfer performance. In order to address this issue, high-order Class E inverter is proposed to offer sufficient design freedoms for load-independent output. This paper incorporates the impedance-model-based design for such an inverter. It is able to ensure high-efficiency operation for wide load range and offer more options for the voltage gain. In the experiment, high-efficiency operation (97.06%) with constant output is ensured and the voltage gain could vary from 0.6 to 1.3.