WO2004068676A1 - Machine electrique comportant un systeme de palier - Google Patents

Machine electrique comportant un systeme de palier Download PDF

Info

Publication number
WO2004068676A1
WO2004068676A1 PCT/DE2003/004222 DE0304222W WO2004068676A1 WO 2004068676 A1 WO2004068676 A1 WO 2004068676A1 DE 0304222 W DE0304222 W DE 0304222W WO 2004068676 A1 WO2004068676 A1 WO 2004068676A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
electrical machine
slip ring
bushing
insulation
Prior art date
Application number
PCT/DE2003/004222
Other languages
German (de)
English (en)
Inventor
Reiner Grillenberger
Norman Perner
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2004068676A1 publication Critical patent/WO2004068676A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/01—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields, i.e. structural association with shields
    • H02K11/012—Shields associated with rotating parts, e.g. rotor cores or rotary shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/30—Electric properties; Magnetic properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

Definitions

  • the invention relates to an electrical machine with a storage system.
  • very high capacitively generated shaft voltages occur in the slip ring rotor motors and generators supplied by the converter. That Measures must be taken to prevent these tensions from being released via the bearings, otherwise bearing damage will occur after a relatively short time.
  • the resulting insulation requirements are high (e.g. insulation resistance> 10 M ⁇ with a measuring voltage of 1000 V DC and a dielectric strength> 2.5 kV AC). Protection against accidental contact must also be provided at these high voltages.
  • One way to meet the requirements is to provide a bearing housing that is radial and axial relative to the
  • End shield is insulated. All mounting screws of the bearing housing must be insulated by bushings and insulation washers. Additional contact protection of the bearing housing is required because it has a wave potential.
  • Another possibility is to provide a shrink-insulated ring in the bearing seat.
  • the outer bearing seat is turned out larger.
  • a ring with foil insulation is shrunk on.
  • An insulating washer is also inserted on both sides of the bearing insert between the bearing head and the bearing cap. This means that the tension cannot continue in the end shield.
  • This insulation technology is comparatively complex and soiling repeatedly leads to the insulation breaking down.
  • Insulated bearings are also known which are covered with a thin ceramic layer or consist entirely of non-conductive material, for example ceramic. A disadvantage of this is that there is no rapid worldwide availability of these special bearings. These bearings are very expensive and not all types of world bearings are available in these versions. In addition, these insulated bearings do not achieve the required dielectric strength in every application.
  • US 4,320,931 also shows a bearing which has an insulation layer.
  • the invention is based on the object of creating an electrical machine which insulates high capacitive shaft voltages generated in particular in the converter mode.
  • the location insulation should be higher than 10 M ⁇ and the protection against contact should also be implemented, the disadvantages of the prior art being avoided.
  • an electrical machine with an inverter-fed slip ring rotor with at least one bearing arrangement, the shaft leading through the bearing arrangement having a bushing made of insulation material or a bushing coated with insulation material in the region of the bearing inner ring.
  • a bushing made of insulation material or of an electrically conductive carrier coated with insulation material is thus fixed on the shaft below the bearing.
  • the axial length of the bushing is such that it has a sufficiently large axial protrusion on both an inner bearing cap and an outer bearing cap. so that the creepage distance prevents transmission of the voltage or rollover from shaft to bearing cap.
  • the bushing is shrunk onto the shaft or connected to the shaft by other known means.
  • a line bushing for the rotor lines from the slip ring body to the slip ring rotor is advantageously provided on the slip ring side of the bushing.
  • 1 shows a bearing arrangement with a bushing made of insulating material
  • 2 shows a bearing arrangement with a coated bushing made of insulating material.
  • the bearing arrangement 1 shows a section of an electrical machine, not shown, with a slip ring arrangement, the bearing arrangement 1 being shown in more detail.
  • the bearing arrangement 1 shows a ball bearing 3 which supports a shaft 2 via a bushing 4 made of insulation material. Suitable insulation materials include: Ceramics or plastics. Sealing elements 7 with O-rings and further auxiliary elements adjoin the bearing 3 axially.
  • the socket 4 has axial recesses 8, in particular when it is positioned between the slip ring arrangement and the rotor, into which rotor lines (not shown in more detail) can be inserted.
  • the bushing 4 has axial protrusions relative to the bearing arrangement 1 in order to avoid flashovers.
  • the socket 4 also has flanges 6, which allow balancing disks or fans to be fitted.
  • the socket 4 can be made from conventional electrically conductive materials; it differs from the socket 4 described above only in that it has a coating 5 made of insulation material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

L'objectif de l'invention est d'éviter les contraintes exercées sur un arbre, qui risquent d'endommager les paliers dans les induits à bagues collectrices alimentées par un changeur de fréquence. A cet effet, il est fait appel à un système de palier (1) caractérisé en ce que l'arbre (2) traversant le système de palier (1) présente, au moins dans la zone de la bague intérieure de palier (2), un coussinet (4) constitué d'un matériau isolant ou revêtu d'un matériau isolant.
PCT/DE2003/004222 2003-01-13 2003-12-19 Machine electrique comportant un systeme de palier WO2004068676A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10300952.3 2003-01-13
DE10300952A DE10300952A1 (de) 2003-01-13 2003-01-13 Elektrische Maschine mit einem Lagersystem

Publications (1)

Publication Number Publication Date
WO2004068676A1 true WO2004068676A1 (fr) 2004-08-12

Family

ID=32519886

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/004222 WO2004068676A1 (fr) 2003-01-13 2003-12-19 Machine electrique comportant un systeme de palier

Country Status (2)

Country Link
DE (1) DE10300952A1 (fr)
WO (1) WO2004068676A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102751835A (zh) * 2011-04-19 2012-10-24 郑福民 无刷直流电动机

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005057613A1 (de) * 2005-12-02 2007-06-06 Schaeffler Kg Wälzlageranordnung
EP2620643A1 (fr) * 2012-01-27 2013-07-31 Siemens Aktiengesellschaft Support de joint composite pour un roulement principal de commande directe d'une éolienne
CN102808857B (zh) * 2012-08-14 2015-05-20 广东明阳风电产业集团有限公司 一种风力发电机传动轴上的轴承组件
CN103607074B (zh) * 2013-11-15 2016-03-23 东方电气（乐山）新能源设备有限公司 风力发电机转子接地环结构
US9882447B2 (en) * 2015-06-09 2018-01-30 Regal Beloit America, Inc. Electric machine, assembly and associated method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2231447A (en) * 1989-05-10 1990-11-14 Mitsubishi Electric Corp Insulated bearing assembly in a traction motor for electric rolling stock
GB2282489A (en) * 1993-10-02 1995-04-05 Bosch Gmbh Robert Rotor for electrical machines with fan

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE368956C (de) * 1923-02-12 Neufeldt & Kuhnke Einrichtung zur Verringerung des Schleifringdurchmessers elektrischer Maschinen
US1152681A (en) * 1914-07-18 1915-09-07 Skf Svenska Kullagerfab Ab Insulated roller-bearing.
US3924906A (en) * 1973-08-01 1975-12-09 Reliance Electric Co Electrically insulated bearing and for reducing shaft current
DD140185A1 (de) * 1978-11-28 1980-02-13 Dietrich Schilling Verfahren und anordnung zur verhinderung von lagerstroemen bei elektrischen maschinen
US4320931A (en) * 1979-12-26 1982-03-23 Siemens-Allis, Inc. Insulating bearing and method of manufacture
DE19821632A1 (de) * 1998-05-14 1999-11-18 Stephan Joeckel Asynchronmaschine mit Erregung durch rotierenden Permanentmagnetring
DE10048343C2 (de) * 2000-09-29 2002-09-12 Siemens Ag Elektrische Maschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2231447A (en) * 1989-05-10 1990-11-14 Mitsubishi Electric Corp Insulated bearing assembly in a traction motor for electric rolling stock
GB2282489A (en) * 1993-10-02 1995-04-05 Bosch Gmbh Robert Rotor for electrical machines with fan

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102751835A (zh) * 2011-04-19 2012-10-24 郑福民 无刷直流电动机

Also Published As

Publication number Publication date
DE10300952A1 (de) 2004-07-22

Similar Documents

Publication Publication Date Title
EP3251181B1 (fr) Corps de bague de collecteur pour un rotor d'une machine dynamoélectrique tournante à excitation électrique
EP1301978B1 (fr) Systeme de palier a roulement pour un moteur electrique
EP3665763B1 (fr) Dispositif pour la réduction de tensions de palier préjudiciables
EP1689065A1 (fr) Stator pour machine électrique
EP3918695A1 (fr) Entraînement électrique et procédé servant à faire fonctionner l'entraînement électrique
DE102016202071A1 (de) Elektrischer Leiter für eine elektrische Maschine mit erhöhtem Leistungsgewicht und elektrische Komponente für die elektrische Maschine
WO2021155983A1 (fr) Machine électrique et véhicule à moteur
CH668517A5 (de) Nutarmierung fuer eine dynamoelektrische maschine.
DE102013213849A1 (de) Fahrzeuginterne elektrische Rotationsmaschine
DE2808347C2 (fr)
WO2004068676A1 (fr) Machine electrique comportant un systeme de palier
DE102013217306B4 (de) Elektrische Maschine mit abgestützter Anschlusseinrichtung
DE2341715A1 (de) Rotierende gleichrichteranordnung
DE102004040184A1 (de) Rotor für einen Generator, insbesondere einen Turbogenerator grosser Leistung
EP2115754A1 (fr) Transformateur
DE102021103062A1 (de) Stator
EP0535334B1 (fr) Rotor d'une machine électrique avec une amenée de courant d'excitation
EP0087053B1 (fr) Arrangement pour une excitation par thyristor rotatif
DE10256974B4 (de) Elektrische Maschine
WO2022179658A1 (fr) Bague de câblage, stator et machine électrique
EP3490115A1 (fr) Boîte à bornes intégrée d'une machine dynamoélectrique rotative
DE102004005368B4 (de) Anordnung zur Stromübertragung
WO2022063359A1 (fr) Machine à flux radial
WO2020239299A1 (fr) Rotor destiné à une machine électrique tournante
EP2044674B1 (fr) Empilement de rotor avec une rondelle isolante d'extrémité rainurée

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): BR CN US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase