Simulation Study on Self-frequency Tracking Control Strategy for Inductive Power Transfer System

Abstract

This paper presents a closed loop Inductive Power Transfer (IPT) system. In this work, the Phased Lock Loop control system is used to control the frequency of Class E resonant converter circuit. Furthermore, self-frequency tracking control strategy with simple detection circuit is proposed as a feedback circuit to IPT system. Through this method, the frequency drifting that is due to variation in reactive components or mutual inductive coupling can be avoided successfully. The IPT system with and without frequency tracking is analyzed at different coupling coefficient. Simulation results confirm that the Class E resonant power converter circuit with frequency tracking gives a better output result with 92% efficiency at 0.8 of coupling coefficient