Patent · US Active

Apparatus for avoiding harmful bearing currents

US10284050B2 · kind B2 · utility

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0References

9Claims

0Family size

Assignee

ebm-papst Mulfingen GmbH & Co. KG · DE

Inventors

Sebastian Schroth · Kupferzell, DE
Roland Oberst · Nettetal, DE
Malte Pils · Ilshofen, DE
Marco Weckert · Künzelsau, DE

Key dates

Filing date	May 4, 2016
Grant date	May 7, 2019
Priority date	—
Expiry date	May 4, 2036

Classification

Technology area (CPC H)Electricity
CPC primaryH02P27/06
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The present invention relates to an apparatus for reducing and/or avoiding harmful bearing currents in an electrical machine (M) such as preferably a three-phase EC motor (M), with a rotor (2) and a stator (3) which is constructed in an insulated manner, wherein at least one outer bearing ring (4a) and one inner bearing ring (4b) are provided between rotor (2) and stator (3), comprising connecting electronics (10) for connecting the motor (M), wherein the stator (3) is connected by means of an electrical connection (20) to a high-frequency electronics potential (11) which differs from the earth potential (UE) and is stable with respect to the latter at a potential tap (20a) of the connecting electronics (10).

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