# US 2023/0053974 A1 · Device for sensing a high-frequency event signal in a rotating electrical machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0053974 A1 - Document ID: US20230053974A1 - Status: Published application - Kind: A1 - Application number: 17/785,766 - Filed: 2020-09-30 - Published: 2023-02-23 - Earliest claimed: 2019-12-16 - Assignees: Siemens Aktiengesellschaft - Applicants: Siemens Aktiengesellschaft - Inventors: MARTIN MEYER; DIRK SCHEIBNER; JÜRGEN SCHIMMER - Web page: https://patentgrep.com/patent/US20230053974A1 ## CPC - G01R 31/343: {in operation} - G01R 31/34: Testing dynamo-electric machines - G01R 31/346: {Testing of armature or field windings} - H02K 11/20: for measuring, monitoring, testing, protecting or switching (rectifiers H02K11/04; power electronics H02K11/33) - H02K 11/35: Devices for recording or transmitting machine parameters, e.g. memory chips or radio transmitters for diagnosis - H02K 15/00: Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract Apparatus for sensing a high-frequency event signal in a rotating electrical machine includes a HF evaluation apparatus, and 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 Includes an antenna for decoupling the high-frequency event signal from a high-frequency electromagnetic field of the rotating electrical machine. A common coupling element connects the at least two sensors to the HF evaluation apparatus. The 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. ## Claims ### Claim at position 1 -20. (canceled) ### Claim 21 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. ### Claim 22 (depends on 21) The apparatus of claim 21, wherein the coupling element includes a transformer. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein the transformer includes primary-side windings connected to the at least two sensors in one-to-one correspondence, and a secondary-side winding, with the primary-side windings being each coupled to the secondary-side winding, said HF-evaluation apparatus being connected to the secondary-side winding. ### Claim 24 (depends on 22) The apparatus of claim 22, wherein the transformer has a magnetic core, in particular an annular ferrite core. ### Claim 25 (depends on 22) The apparatus of claim 22, wherein the primary-side windings and the secondary-side winding of the transformer are arranged twisted with one another. ### Claim 26 (depends on 21) The apparatus of claim 21, further comprising an LF evaluation apparatus designed to evaluate the low-frequency sensor signal to decouple the high-frequency event signal, said at least two sensors being each connected to the LF evaluation apparatus. ### Claim 27 (depends on 21) The apparatus of claim 21, wherein at least one of the at least two sensors is embodied as a temperature sensor. ### Claim 28 (depends on 21) The apparatus of claim 21, wherein the low-frequency sensor signal and the high-frequency event signal are differential signals. ### Claim 29 (depends on 21) The apparatus of claim 21, wherein the at least two sensors are connected Individually to the coupling element. ### Claim 30 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. ### Claim 31 (depends on 30) The method of claim 30, wherein the coupling element is designed as a transformer. ### Claim 32 (depends on 31) The method of claim 31, further comprising: connecting the at least two sensors to primary-side windings of the transformer in one-to-one correspondence; connecting a secondary-side winding of the transformer to the HF-evaluation apparatus; and coupling the primary-side windings to the secondary-side winding. ### Claim 33 (depends on 32) The method of claim 32, further comprising twisting the primary-side windings and the secondary-side winding together with one another. ### Claim 34 (depends on 30) The method of claim 30, further comprising connecting each of the at least two sensors to an LF evaluation apparatus which is designed to evaluate the low-frequency sensor signal and to decouple the high-frequency event signal. ### Claim 35 (depends on 30) The method of claim 30, wherein the low-frequency sensor signal and the high-frequency event signal are transferred differentially. ### Claim 36 (depends on 30) The method of claim 30, wherein the at least two sensors are connected individually to the common coupling element. ### Claim 37 (depends on 30) A control unit configured to carry out a method as set forth in claim 30. ### Claim 38 (depends on 30) A computer program embodied in a non-transitory computer readable medium, wherein the computer program, when loaded into a control unit and executed by the control unit, causes the control unit to carry out a method as set forth in claim 30. ### Claim 39 (depends on 30) A computer program product, comprising a computer program embodied in a non-transitory computer readable medium, wherein the computer program, when loaded into a control unit and executed by the control unit, causes the control unit to carry out a method as set forth in claim 30. ### Claim 40 A rotating electrical machine, comprising an 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 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.