LQG control of capacitive power transfer system

Abstract

This paper presents the design and simulation of an auto-tuning capacitive power transfer (CPT) system based on Class-E converter approach. The reason of selecting Class-E converter is due to the remarkably high efficiency that it can achieve. However, the load's variation affects the output voltage of Class-E converter significantly and increases the switching loss of the system. To regulate the output voltage, we first obtain a state space model of the system by the first harmonic analysis. Then, based on the model, a linear quadratic Gaussian (LQG) controller is designed. Simulation is presented at the end to verify the effectiveness of the controller design.