Abstract
This paper deals with a combination of an inductive based contactless energy transfer system and a data transfer from the primary side to the secondary side of this system. Therefore, an extension of a self-oscillating power electronics offering the possibility to change the capacity of the resonant circuit during energy transmission is presented. An additional switchable capacitor in the compensation network leads to an immediate shift of the resonance frequency of the circuit. On the basis of this frequency shift a frequency shift keying modulation is implemented to encode binary data in the energy signal.
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