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1. WO2007093465 - ELECTRICAL MACHINE HAVING AN APPARATUS FOR AVOIDING DAMAGING BEARING CURRENTS, AND A CORRESPONDING METHOD

Publication Number WO/2007/093465
Publication Date 23.08.2007
International Application No. PCT/EP2007/050232
International Filing Date 11.01.2007
Chapter 2 Demand Filed 17.12.2007
IPC
H02K 11/00 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
KDYNAMO-ELECTRIC MACHINES
11Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
CPC
F16C 19/52
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
19Bearings with rolling contact, for exclusively rotary movement
52with devices affected by abnormal or undesired conditions
F16C 33/66
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
33Parts of bearings; Special methods for making bearings or parts thereof
30Parts of ball or roller bearings
66Special parts or details in view of lubrication
H02K 11/40
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
KDYNAMO-ELECTRIC MACHINES
11Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
40Structural association with grounding devices
H02K 5/1732
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
KDYNAMO-ELECTRIC MACHINES
5Casings; Enclosures; Supports
04Casings or enclosures characterised by the shape, form or construction thereof
16Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
173using bearings with rolling contact, e.g. ball bearings
1732radially supporting the rotary shaft at both ends of the rotor
Applicants
  • SIEMENS AKTIENGESELLSCHAFT [DE]/[DE] (AllExceptUS)
  • SCHREPFER, Armin [DE]/[DE] (UsOnly)
  • BINDER, Andreas [AT]/[DE] (UsOnly)
  • WOLF, Jürgen [DE]/[DE] (UsOnly)
Inventors
  • SCHREPFER, Armin
  • BINDER, Andreas
  • WOLF, Jürgen
Common Representative
  • SIEMENS AKTIENGESELLSCHAFT
Priority Data
10 2006 007 437.817.02.2006DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) ELEKTRISCHE MASCHINE MIT EINER VORRICHTUNG ZUR VERMEIDUNG VON SCHÄDLICHEN LAGERSTRÖMEN UND ENTSPRECHENDES VERFAHREN
(EN) ELECTRICAL MACHINE HAVING AN APPARATUS FOR AVOIDING DAMAGING BEARING CURRENTS, AND A CORRESPONDING METHOD
(FR) Machine électrique munie d'un dispositif pour éviter les courants de palier dommageables et procédé correspondant
Abstract
(DE)
Es soll vermieden werden, dass an elektrischen Maschinen über Lager (WL) schädigende Schmierfilm-Entladungen stattfinden. Aus diesem Grund ist vorgesehen, mit Hilfe einer Stromquelle (IQ) gezielt einen Strom durch das Lager (WL) einzuprägen. Der Strom fließt dann von einer der beiden Lagerkomponenten über den Schmierfilm zu der anderen Lagerkomponente. Insbesondere Wechselströme eignen sich dazu, dass der Schmierfilm leitend wird, so dass sich die durch den Schmierfilm definierte Kapazität nicht oder nur gering aufladen kann.
(EN)
The aim is to avoid damaging lubricating-film discharges occurring via bearings (WL) in electrical machines. For this reason, provision is made for a current to be forced to flow through the bearing (WL) specifically, with the aid of a current source (IQ). The current then flows from one of the two bearing components via the lubricating film to the other bearing component. Alternating currents are particularly suitable since the lubricating film is conductive, so that the capacitance defined by the lubricating film cannot be charged, or can be charged only slightly.
(FR)
L'invention a pour object d'empêcher sur les machines électriques la formation de décharges de film de lubrifiant dommageables par les paliers (WL). Pour ce faire, il est prévu de forcer le passage d'un courant à travers le palier (WL) à l'aide d'une source de courant (IQ). Le courant circule alors de l'un des deux composants du palier vers l'autre composant du palier en passant par le film de lubrifiant. Les courants alternatifs conviennent particulièrement pour rendre le film conducteur de sorte que la capacité définie par le film conducteur ne puisse pas ou très peu se charger.
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