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Inductive power transfer is a highly attractive option for powering unmanned aerial or underwater vehicles, in harsh environments and while in continuous motion. This study presents a variable frequency controller for series–series compensated contactless chargers operating in dynamic conditions. The controller tracks, in real time, the frequency for which the output voltage is load independent. The...
In this paper, the robustness of 1.2 kV normally-on SiC JFETs against short circuits is investigated through experimental parametric analysis and three-dimensional thermal model simulation. Particular emphasis is given to the study of short circuits in the wiring outside the power converter, in which case, a large stray inductance is part of the main power loop. This work presents a more accurate...
This work implements an asymmetric loading rectification technique in an Inductive Power Transfer System (IPTS) intended for use in electric vehicle wireless chargers. Asymmetric loading is performed by a half-cycle short-circuit / half-cycle loading operation, in the secondary side of a series-series compensated IPTS. The aim is to reduce the value of the load resistance as reflected to the power...
Power transfer and efficiency maximization are the main aims in Inductive Power Transfer Systems (IPTSs) control. Misalignment between the magnetically coupled coils is inevitable in real life conditions and its impact in the power transfer capability of such systems is significant. This work presents a simple, yet robust technique for real-time, wireless tracking of the optimal operational frequency...
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