Method and apparatus for communication by means of a transformer

摘要

A method for communication by means of a transformer, which has at least a primary coil and a secondary coil, which are parts of an oscillatory circuit, wherein the oscillatory circuit is supplied on the primary side with an exciter frequency. For transmission of a signal from the secondary side to the primary side, the inductance of the secondary coil is modulated. A corresponding apparatus for performing the method is likewise provided.

主权项

1. A method for communication and power transmission by means of a transformer, which has at least a primary coil and a secondary coil, which are parts of an oscillatory circuit, comprising the steps of:
supplying the oscillatory circuit on the primary side with an exciter frequency; the energy and signal transmission from the primary side to the secondary side and signal transmission from the secondary side to the primary side occurs via the transformer, and modulating an inductance of the secondary coil for transmission of a signal from the secondary side to the primary side, wherein: communication phases are assigned to a secondary side (II) corresponding to the secondary coil, during which only the secondary side (II) transmits data, wherein the oscillatory circuit is excited with a resonant frequency during communication phases, and the exciter frequency is controlled during communication phases from the secondary side (II) to a primary side (I) corresponding to the primary coil, in such a manner that the exciter frequency also in the case of a change of the secondary inductance always corresponds to the resonant frequency of the oscillatory circuit.