Patent ID: 11965925
Assignee: AUDI AG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A test device to localize a partial discharge in or at an electrical component, the test device comprising:
at least one antenna to respectively capture electromagnetic waves caused by the partial discharge in the electrical component, the at least one antenna positioned in a set environment around the electrical component,
multiple microphones, which are arranged in the set environment around the electrical component, the multiple microphones to capture sound waves caused by the partial discharge,
a control unit configured to,
apply a plurality of voltage signals to at least two phases, from among phases (U, V, W), of a winding, from among plural windings, of the electrical component, according to a switching matrix, to determine the partial discharge,
examine if intensity of an electromagnetic wave, from among the electromagnetic waves captured by the at least one antenna, exceeds a first limit value and/or intensity of a sound wave, from among the sound waves, captured by at least one of the multiple microphones exceeds a second limit value, and
ascertain a location of the partial discharge from among the at least two phases of the phases (U, V, W), depending on the sound wave captured and/or the electromagnetic wave, and based on the first limit value and/or the second limit value.