WO2010121983A1 - Machine électrique comprenant un enroulement rotorique alimenté en courant par l'intermédiaire de bagues collectrices - Google Patents

Machine électrique comprenant un enroulement rotorique alimenté en courant par l'intermédiaire de bagues collectrices Download PDF

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Publication number
WO2010121983A1
WO2010121983A1 PCT/EP2010/055094 EP2010055094W WO2010121983A1 WO 2010121983 A1 WO2010121983 A1 WO 2010121983A1 EP 2010055094 W EP2010055094 W EP 2010055094W WO 2010121983 A1 WO2010121983 A1 WO 2010121983A1
Authority
WO
WIPO (PCT)
Prior art keywords
brush holder
carbon brush
carbon
carbon brushes
ring
Prior art date
Application number
PCT/EP2010/055094
Other languages
German (de)
English (en)
Inventor
Alexander Schwery
Carlos Ramirez
Heinz Zumsteg
Original Assignee
Alstom Technology Ltd.
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
Priority claimed from DE200910037988 external-priority patent/DE102009037988A1/de
Application filed by Alstom Technology Ltd. filed Critical Alstom Technology Ltd.
Publication of WO2010121983A1 publication Critical patent/WO2010121983A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/22—Asynchronous induction motors having rotors with windings connected to slip-rings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H02K13/003—Structural associations of slip-rings

Definitions

  • the present invention relates to the field of high power electrical machines. It relates to an electrical machine according to the preamble of claim 1.
  • Double-fed asynchronous machines especially in the power range from 20 MVA to 500 MVA or above, can be used for speed variable
  • the rotor winding consists of individual rods, which are embedded in grooves in the rotor core. In the winding head, the individual rods are connected to form a winding.
  • the infeed of the streams takes place via at least three slip rings, which are fastened to the shaft at the end of the machine.
  • Such a machine is 1, wherein the axis of the machine can be aligned vertically or horizontally.
  • the electric machine 10 of FIG. 1 comprises a rotatably mounted about an axis 17 rotor 25 with a central body 1 1 and a concentric surrounding the central body 11 rotor plate body 12 with the rotor winding 13.
  • the rotor winding 13 has at both ends outside of the rotor body 12 a rotor winding head 13 'up. Separated by an air gap, the rotor 25 is concentrically enclosed by a stator lamination body 15, in which a stator winding with corresponding Statorwickelköpfen 16 is housed.
  • At one end of the central body 1 1 of the rotor 25 is in a shaft 1 1 ', which in the axial direction one behind the other several slip rings 14 carries.
  • the transmission of the currents to the slip rings 14 is done according to FIG. 2 by carbon brushes 24, which are mounted in carbon brush holders 23.
  • carbon brushes 24 are uniformly distributed over the circumference.
  • Each of a slip ring 24 associated carbon brush holder 23 are in turn mounted on a carbon brush holder ring 22 which directs the currents to the carbon brushes 24.
  • the carbon brushes are each mounted in a carbon brush holder and the carbon brush holder attached to the carbon brushes on the inside of a common, concentric with the axis arranged carbon brush holder ring.
  • the carbon brush holder ring acts as a power distribution ring and connects the carbon brushes with even distribution of the currents to the main terminal.
  • the geometry of the carbon brush holder ring changes over the circumference so that the current distribution for all carbon brushes is the same.
  • the cross section of the carbon brush holder ring increases with increasing distance from the main connection.
  • FIG. 1 in a highly simplified representation of a section of an electric machine with power supply of the rotor winding via slip rings, as is suitable for the application of the invention
  • Fig. 2 shows an exemplary configuration of carbon brushes, on the on
  • Circumference distributed power is transmitted to the slip rings
  • FIG. 3 shows a carbon brush holder ring with a special geometry for uniforming the currents transmitted via the different carbon brushes according to an exemplary embodiment of the invention.
  • Fig. 4 shows an arrangement as in Figure 3, but with two main terminals.
  • the basic idea of the invention is to achieve a uniform current distribution with a specially defined geometry of the power distribution arrangement and in particular of the ring on which the carbon brush holder are mounted.
  • the current distribution may be controlled directly via the geometry of the carbon brush holder ring, as with the carbon brush holder ring 22 'of the power distribution assemblies 18' according to the embodiments of FIGS. 3 and 4 is the case.
  • the thickness or the cross-sectional area F1, F2, as well as the diameter of the ring can be adjusted so that the same voltage drop occurs from the connection point at the main terminal 19 to all carbon brush holders 23. It is important to ensure that this uniform current distribution remains constant even when the frequency changes.
  • the thickness and thus the cross-sectional area F1 in the vicinity of the main terminal 19 is significantly smaller than the thickness or cross-sectional area F2 in the part of the carbon brush holder ring 22 'farthest from the main terminal 19.
  • the thickness or the cross-sectional area increases steadily with increasing distance from the main terminal 19.
  • two main ports 19 are provided on the carbon brush holder ring 22 '.
  • the cross-sectional area F1, F2 of the carbon brush holder ring 22 ' is lowest in the vicinity of the main terminals 19, 19' (F1) and steadily increases with increasing distance from the respective main terminal 19 or 19 'until they are in a range of the greatest distance between the main terminals 19 and 19 'reaches a maximum value (F2).

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Current Collectors (AREA)

Abstract

L'invention concerne une machine électrique d'une puissance se situant dans une plage de plusieurs MVA, en particulier une machine asynchrone, comprenant un rotor tournant autour d'un axe et comportant un corps central, un arbre et un enroulement rotorique, l'enroulement rotorique étant alimenté en courant à partir d'un raccordement principal, par des bagues collectrices montées sur l'arbre, chaque bague collectrice étant connectée électriquement par plusieurs balais de charbon (24) installés de manière concentrique autour de l'axe. Dans une telle machine, une charge équilibrée des balais de charbon est obtenue de manière simple par une distribution égale du courant en provenance du raccordement principal (19) entre les balais de charbon (24) individuels de chaque bague collectrice (14) au moyen d'un dispositif de distribution de courant (18') présentant une géométrie adéquate.
PCT/EP2010/055094 2009-04-24 2010-04-19 Machine électrique comprenant un enroulement rotorique alimenté en courant par l'intermédiaire de bagues collectrices WO2010121983A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102009018551.8 2009-04-24
DE102009018551 2009-04-24
DE102009037988.6 2009-08-20
DE200910037988 DE102009037988A1 (de) 2009-08-20 2009-08-20 Elektrische Maschine mit einer Rotorwicklung, die über Schleifringe mit Strom versorgt wird

Publications (1)

Publication Number Publication Date
WO2010121983A1 true WO2010121983A1 (fr) 2010-10-28

Family

ID=42309946

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/055094 WO2010121983A1 (fr) 2009-04-24 2010-04-19 Machine électrique comprenant un enroulement rotorique alimenté en courant par l'intermédiaire de bagues collectrices

Country Status (1)

Country Link
WO (1) WO2010121983A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013034237A3 (fr) * 2011-09-08 2013-12-19 Voith Patent Gmbh Moteur asynchrone à alimentation double
EP2800268A3 (fr) * 2013-05-02 2016-05-25 GE Energy Power Conversion Technology Limited Circuit électrique multiphase

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191128682A (en) * 1911-12-20 1912-03-21 Bruce Peebles & Co Ltd Improvements in Apparatus for Lifting the Brushes and Short-circuiting the Rotor Windings of Alternating Current Dynamo Electric Machines.
DE2124196A1 (de) * 1971-05-13 1972-11-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schleifring für elektrische Maschinen großer Leistung
EP0858148A1 (fr) * 1997-02-06 1998-08-12 Gec Alsthom Moteurs Sa Agencement de mise hors-circuit des moyens de démarrage par rhéostat pour moteur asynchrone à bagues et moteur équipé d'un tel agencement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191128682A (en) * 1911-12-20 1912-03-21 Bruce Peebles & Co Ltd Improvements in Apparatus for Lifting the Brushes and Short-circuiting the Rotor Windings of Alternating Current Dynamo Electric Machines.
DE2124196A1 (de) * 1971-05-13 1972-11-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schleifring für elektrische Maschinen großer Leistung
EP0858148A1 (fr) * 1997-02-06 1998-08-12 Gec Alsthom Moteurs Sa Agencement de mise hors-circuit des moyens de démarrage par rhéostat pour moteur asynchrone à bagues et moteur équipé d'un tel agencement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013034237A3 (fr) * 2011-09-08 2013-12-19 Voith Patent Gmbh Moteur asynchrone à alimentation double
EP2800268A3 (fr) * 2013-05-02 2016-05-25 GE Energy Power Conversion Technology Limited Circuit électrique multiphase
US9543812B2 (en) 2013-05-02 2017-01-10 Ge Energy Power Conversion Technology Limited Multi-phase electric circuit

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