A Differential Relaxation Half-Bridge Oscillator for Inductive Power Transfer
Conference: PCIM Europe 2023 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/09/2023 - 05/11/2023 at Nürnberg, Germany
doi:10.30420/566091090
Proceedings: PCIM Europe 2023
Pages: 7Language: englishTyp: PDF
Authors:
Seliger, Norbert (Technical University of Applied Sciences Rosenheim, Germany)
Abstract:
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.