A Differential Relaxation Half-Bridge Oscillator for Inductive Power Transfer
Konferenz: PCIM Europe 2023 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
09.05.2023-11.05.2023 in Nürnberg, Germany
doi:10.30420/566091090
Tagungsband: PCIM Europe 2023
Seiten: 7Sprache: EnglischTyp: PDF
Autoren:
Seliger, Norbert (Technical University of Applied Sciences Rosenheim, Germany)
Inhalt:
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.