Device for sensing a high-frequency event signal in a rotating electrical machine

Apparatus for sensing a high-frequency event signal in a rotating electrical machine, said apparatus comprising:

• a HF evaluation apparatus;
• at least two sensors arranged in the rotating electrical machine and designed to sense a low-frequency sensor signal, each of the at least two sensors comprising an antenna for decoupling the high-frequency event signal from a high-frequency electromagnetic field of the rotating electrical machine;
• and
• a coupling element, in particular reactive coupling element, connecting the at least two sensors to the HF evaluation apparatus, said coupling element designed to transfer the high-frequency event signal from at least one of the at least two sensors to the HF evaluation apparatus and to decouple the low-frequency sensor signal.

A method, comprising:

• arranging at least two sensors In a rotating electrical machine for sensing a low-frequency sensor signal;
• decoupling a high-frequency event signal from a high-frequency electromagnetic field of the rotating electrical machine with antennas of the at least two sensors;
• connecting the at least two sensors via a common coupling element to a common HF evaluation apparatus;
• and
• transferring the high-frequency event signal from at least one of the at least two sensors via the common coupling element to the common HF evaluation apparatus and decoupling the high-frequency event signal from the low-frequency sensor signal.