Patent ID: 9035664
Filing Date: 2015-05-19
Classification: G01R,G06K,H02K

Abstract:
1. A device for detecting a bearing voltage across a bearing supporting a shaft, wherein the shaft is connected to an electric motor and wherein a measuring gap is formed between a first element attached to the shaft and a second element being attached to or being part of the electric motor or a working machine driven by the shaft, the device comprising: at least one board arranged in the measuring gap and having a first electrically conductive layer facing the first element, a second electrically conductive layer facing the second element, a central insulation layer disposed between the first layer and the second layer, and a measuring circuit connected between the first conductive layer and the second conductive layer measuring a voltage produced across a first capacitance formed between the first conductive layer and the second conductive layer, wherein the produced voltage is related to a bearing voltage.