Patent · US Active

Earthing device

US10069382B2 · kind B2 · utility

1Cited by

9References

16Claims

0Family size

Assignee

ebm-papst Mulfingen GmbH & Co. KG · DE

Inventors

Michael Sturm · Bad Mergentheim, DE
Wolfang Ströbel · Blaufelden, DE

Key dates

Filing date	Sep 16, 2015
Grant date	Sep 4, 2018
Priority date	—
Expiry date	Aug 25, 2036

Classification

Technology area (CPC H)Electricity
CPC primaryH02K11/40
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to an earthing device for preventing rotor-induced bearing currents in an electric motor, comprising an electrically conductive annular element having retaining means arranged thereon, to which means fiber bundles are fastened, via which bundles electrical discharge of a static charge to at least one discharge element can be carried out, wherein the fiber bundles are fastened so as to be oriented in an oblique angular position with respect to a radial plane which is perpendicular to an axial center line of the annular element and/or with respect to an axial plane and have a length protruding from the retaining means of the annular element which is greater than that required to bridge a radial spacing between the annular element and the discharge element.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.