LCC Compensation Analysis of Loosely Coupled Power Transmission Based on Class-E Power Amplifier

In order to reduce the effect of the loosely coupled transformer on the wireless power transfer system and achieve maximum power transmission of the system, the LCC compensated inductively coupled power transfer system based on the class-E inverter is proposed. According to the fundamental characteristics of the class-E amplifier and the LCC circuit, combined with the soft-switching operating conditions, the formula for calculating parameters of LCC compensation circuit is derived. By applying the constraint to the resistive component of the primary coil input impedance and the coupling coefficient, the optimum parameter value can be selected to ensure the system efficiency. Finally, the parameters simulation are supplied to verify the system transfer efficiency and load-carrying capacity. It shows that the zero-voltage turn off of the high-frequency inverter is realized and the overall ICPT system efficiency is improved.