A simple method to control automatically the performance of three‐coil wireless power transfer systems without direct output measurement

Abstract

AbstractThe control and optimization of wireless power transfer (WPT) systems require the continuous monitoring of their performance or, similarly, some output parameters. The solution presented in this manuscript is based on the relationship between some figures of merit representative of the WPT systems and allows to control automatically (in a simple way, without any direct measurement at the load circuit) the performance of a three‐coil WPT system under variations on the load and/or mutual inductance between the intermediate and load coils. The qualities and limitations of the proposed method are discussed in detail. Conventional circuit analysis and practical results are included to validate the presented theory and its applicability in an automatic control scheme.