Reduced-Order Dynamical Models of Tuned Wireless Power Transfer Systems

Abstract

Dynamical models are of primary interest when studying the dynamical control of wireless power transfer (WPT) systems. Most existing dynamical models of WPT systems are derived using the generalized state space averaging method, extended describing functions, or the concept of coupled modes. These models are applicable to both tuned and detuned WPT systems but suffer from high orders and complex formulae. This paper focuses on tuned WPT systems and proposes the reduced-order dynamical models, which are derived from the energy point of view. The proposed models have much lower orders and simpler formulae as compared to the existing models. Experimental results are presented for verification.