APPARATUS FOR AVOIDING HARMFUL BEARING CURRENTS

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)...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	OBERST, Roland, SCHROTH, Sebastian, PILS, Malte, WECKERT, Marco
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	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).