2013 2023 eng 7 conferenceobject Mesago GmbH Nürnberg 0 -- -- -- We present inductive power transfer (IPT) with a half-bridge converter based on differential relaxation self-oscillation. The oscillation dynamics of the converter automatically adapts to variation in the inductive coupling link and changes in the load, respectively. Design equations based on theoretical circuit analysis reveals a high power transfer efficiency (>90%) for alteration of coupling distance in the strong coupling regime. A prototype system employing GaN-HEMTs confirms the theoretically predicted characteristics of the proposed circuit. Proceedings PCIM Europe 2023 Ja publish Norbert Seliger eng uncontrolled wireless power transfer, inductive power transfer, half-bridge converter, relaxation oscillator Ingenieurwissenschaften und zugeordnete Tätigkeiten Fakultät für Ingenieurwissenschaften Technische Hochschule Rosenheim