Patent ID: 11863027
Assignee: ABB SCHWEIZ AG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A rotating electrical machine comprising a machine frame, a rotor, a shaft attached to the rotor and bearings supporting the shaft and the rotor in the machine frame,
wherein the rotating electrical machine includes further an electrically conducting member having a hole, the electrically conducting member being attached to the machine frame such that the shaft extends through the hole,
wherein the electrically conducting member is in galvanic connection with the shaft when attached to the machine frame, and
wherein a diameter of the hole in the electrically conducting member is adapted to increase, such that a galvanic coupling between the shaft and the electrically conducting member is lost, to form a capacitive coupling between the electrically conducting member and the shaft.