WO2006082143A1 - Cale d'encoche d'un stator ou d'un rotor d'un moteur electrique - Google Patents

Cale d'encoche d'un stator ou d'un rotor d'un moteur electrique Download PDF

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Publication number
WO2006082143A1
WO2006082143A1 PCT/EP2006/050320 EP2006050320W WO2006082143A1 WO 2006082143 A1 WO2006082143 A1 WO 2006082143A1 EP 2006050320 W EP2006050320 W EP 2006050320W WO 2006082143 A1 WO2006082143 A1 WO 2006082143A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
slot
slot closure
relative permeability
closure wedge
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2006/050320
Other languages
German (de)
English (en)
Inventor
Steven-Andrew Evans
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2006082143A1 publication Critical patent/WO2006082143A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H02K3/487—Slot-closing devices
    • H02K3/493—Slot-closing devices magnetic
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H02K3/487—Slot-closing devices

Definitions

  • the present invention relates to a slot closure wedge for a stator or a rotor of an electric machine, in particular a large induction machine, e.g. a machine provided for a hybrid vehicle. Furthermore, the present invention relates to a method for producing such a slot closure wedge.
  • FIG. 4 shows such an arrangement according to the prior art, in which prefabricated windings 3 are inserted in stator slots 2a of a stator and the stator slots 2a are subsequently closed to the internal stator opening by means of non-magnetic slot closure wedges 4, so that the windings 3 are secured.
  • the slot closure wedges 4 are inserted according to the tongue and groove principle in the stator.
  • Groove arrangements result in increased magnetization current due to the large effective air gap and higher high frequency iron losses and higher vibration due to the higher air gap field variations, and consequently higher noise levels. There may also be pulsating forces on the stator pole teeth. Due to the reduced magnetization reactance of the Power factor further negatively affected in machines with open slots. A low power factor leads to the serious effect of increasing the rated power of the drive converter since the rated power is inversely proportional to the power factor.
  • magnetically-open groove arrangements can also be eliminated or reduced by the use of magnetic slot wedges for closing the open stator slots.
  • the use of magnetically closed grooves, partially closed grooves, or magnetic slot wedges reduces the air gap field variations resulting from the grooves, thus reducing vibration, noise, and losses associated with these variations.
  • Magnetic closing of the stator slot further results in a lower effective air gap width, thereby increasing the magnetization reactance and possibly also the power factor.
  • the use of magnetic slot wedges results in increased slot leakage reactance, thereby reducing the startup torque and maximum torque generated by the machine. Accordingly, the magnetic permeability of the slot closure wedges should be large enough to reduce air gap field variations, but also low enough to avoid a large increase in slot leakage reactance. It is clear that a partially magnetic composite material having high mechanical strength is needed.
  • slot wedges made using an insulating material having layers of unidirectional steel wires; a low permeability, high resistance soft magnetic powder mixture which forms a plastic mass; laminated epoxy glass mixed with iron powder; Soft ferrite and soft magnetic iron powder (Permit).
  • Groove wedges should have a rather low initial relative permeability of about 10 along with a high saturation flux density.
  • FIG. 6 shows such slot closure wedges 5 instead of the slot closure wedges 4 shown in FIG. 4. This arrangement reduces the above-mentioned electromagnetic problems of the non-magnetic slot closure wedges and allows the insertion of the prefabricated ones
  • Stator windings 3 from the inner stator opening in the stator 2a.
  • the slot wedge according to the invention for a stator or a rotor of an electric machine is designed such that it consists of a two-state steel and adjacent to the stator or the rotor of the electric machine
  • Edge regions has a high relative permeability and in between a middle region of low relative permeability.
  • the method according to the invention for producing a slot closure wedge for a stator or a rotor of an electrical machine comprises
  • the normally prevailing high magnetic permeability in local areas can be permanently reduced to the permeability of air by means of a heat treatment.
  • the "gap openings" of the slot closure wedge are produced by a demagnetization of the magnetic material, wherein the slot closure wedge actually does not have to have any physical recesses. The so with an effective
  • Slit opening in the magnetic sense
  • slot closure wedge which has a high relative permeability in its edge regions can then be inserted into the stator or the rotor of the electric machine as in the prior art shown in Figure 4, whereby the windings in the stator or Rotornuten be secured.
  • the high relative permeability is preferably in the range of 900 or above, and the low permeability according to the invention is preferably in the range 1.
  • the central regions, ie, effective stomata, of the grooving wedge according to the invention can be produced by means of a heat treatment in which the material is heated to temperatures above 1100 ° C to permanently reduce the relative permeability by nearly three orders of magnitude from about 900 to 1, ie, air.
  • This heating is carried out according to the invention preferably by means of, for example, the method of a plasma welding head over the central region, which is to form the effective gap opening of the slot closure wedge.
  • the slot wedge according to the invention thus consists of a one-piece soft magnetic metal part having adjacent regions of high and low relative permeability.
  • the heat treated center region of low permeability further exhibits the mechanical strength and integrity of the keyway wedge initially provided with a high permeability.
  • the slot closure wedge is preferably provided to terminate provided for stator windings stator of a large induction machine.
  • the low permeability center region preferably forms a groove slot width of about 1/3 of the slot closure wedge or less.
  • the width of the effective slot slot i.e., the middle portion having a relative permeability of air, as the openings of conventional partially closed stator slots optimized for a particular induction machine.
  • FIG. 1 shows a partial plan view of a stator of a large induction machine, in which slot closure wedges are used according to a first embodiment of the invention
  • FIG. 2 shows a detailed view of one of the slot closure wedges shown in FIG. 1 according to the first exemplary embodiment of the invention
  • Figure 3 is a partial plan view of a stator of a large induction machine, in which
  • Figure 4 is a partial plan view of a stator of a large induction machine using conventional non-magnetic slot wedges.
  • Figure 5 is a partial plan view of a stator of a large induction machine, are used in the conventional semi-closed stator for receiving the windings
  • Figure 6 is a partial plan view of a stator of a large induction machine using conventional magnetic slot wedges made of low permeability soft magnetic iron filings.
  • the stator 2 comprises a plurality of tooth-shaped inwardly directed pole teeth 2b, wherein between two adjacent pole teeth 2b is provided in each case one open to the inner stator stator slot 2a.
  • the stator groove 2a has parallel sides, and therefore the pole teeth 2b are tapered from outside to inside, so that the prefabricated coils 3 can be easily inserted into the stator slots 2a.
  • the inwardly open stator slots 2a are finished with slot lock keys 1 according to a first embodiment of the present invention, so that the inserted coils 3 are held in the stator slots 2a.
  • a detail view of the slot closure wedge according to the invention according to the first embodiment of the present invention is shown in FIG.
  • the slot closure wedge is essentially configured in its shape as the non-magnetic slot closure wedge of the prior art shown in FIG. It has V-shaped ends which are inserted into V-shaped grooves 2 c in the pole teeth 2 b of the stator 2.
  • Groove wedges 1 have magnetic properties, and the intermediate region Ic of the grooved wedge 1 according to the invention is demagnetized by a heat treatment and has a low relative permeability of air.
  • the entire slot closure wedge 1 has a width b and the central area Ic has a width a.
  • the side areas Ia, Ib each have a width of (b-a) / 2.
  • Figure 3 shows slot closure wedges 1 according to a second embodiment of the present invention.
  • These groove closure wedges 1 which likewise have side regions 1a, 1b and a middle region 1c with the dimensions already described with reference to the first embodiment of the present invention, have in contrast to the Nutver gleichkeilen 1 according to the first exemplary embodiment of the present invention, no V-shaped ends which lie in V-shaped grooves 2c of the pole teeth 2b, but sawtooth-shaped ends which lie in sawtooth-shaped grooves in the pole teeth 2b, wherein the arrangement so is selected that slipping out of the NutverBankkeile in the inner Statoröffiiung the
  • Stators 2 is prevented.
  • the two-state magnetic groove lock wedge of the present invention has the properties of two high relative permeability magnetic pole shoes Ia, Ib that are different from a low relative heat treated center region Ic
  • Permeability are separated, which has the properties of air to produce an effective slot slot opening (not physical, but magnetic).
  • an ideal arrangement for a slot closure wedge is produced according to the invention, which simulates a conventional partially closed slot provided for receiving windings. Accordingly, the present invention avoids the electromagnetic disadvantages associated with the use of conventional non-magnetic slot wedges.
  • the effective width of the "slot openings" avoids the fluctuations caused by the groove shape, thereby reducing vibration, noise and losses associated with these variations. Further, the effective width of the air gap is also reduced, thereby increasing the magnetization reactance and also the power factor.
  • the slot wedges according to the invention have similar or better magnetic or mechanical properties than conventional slot wedges, which are usually used in electrical machines, since no interruptions of the material of the slot closure wedges 1 take place, but only a change in the magnetic properties.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

L'invention concerne une cale d'encoche (1) d'un stator (2) ou d'un rotor d'un moteur électrique réalisée dans un acier et ayant, dans les bordures (1a, 1b) adjacentes au stator (2) ou au rotor du moteur électrique, un premier état d'une grande perméabilité relative et, dans la zone centrale intermédiaire (1c), un deuxième état ayant une perméabilité relative plus faible.
PCT/EP2006/050320 2005-02-01 2006-01-19 Cale d'encoche d'un stator ou d'un rotor d'un moteur electrique Ceased WO2006082143A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005004566.9 2005-02-01
DE200510004566 DE102005004566A1 (de) 2005-02-01 2005-02-01 Nutverschlusskeil für einen Stator oder einen Rotor einer elektrischen Maschine

Publications (1)

Publication Number Publication Date
WO2006082143A1 true WO2006082143A1 (fr) 2006-08-10

Family

ID=36177581

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/050320 Ceased WO2006082143A1 (fr) 2005-02-01 2006-01-19 Cale d'encoche d'un stator ou d'un rotor d'un moteur electrique

Country Status (2)

Country Link
DE (1) DE102005004566A1 (fr)
WO (1) WO2006082143A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8253298B2 (en) 2008-07-28 2012-08-28 Direct Drive Systems, Inc. Slot configuration of an electric machine
DE102013200454A1 (de) 2013-01-15 2014-07-31 Robert Bosch Gmbh Rotor für eine elektrische Maschine mit Nutverschlusselementen

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2363699A1 (fr) * 2010-03-02 2011-09-07 Siemens Aktiengesellschaft Surveillance des vibrations d'un élément magnétique dans une machine électrique
US8745848B2 (en) 2011-08-30 2014-06-10 Siemens Industry, Inc. Induction machine rotor slot having diverging sidewall profiles and forming method
DE102011086181A1 (de) 2011-11-11 2013-05-16 Robert Bosch Gmbh Nutverschlusskeil für ein Maschinenelement einer elektrischen Maschine
DE102019103586A1 (de) 2019-02-13 2020-08-27 Wobben Properties Gmbh Nutverschlusskeil für einen Windenergieanlagengenerator sowie Windenergieanlagengenerator damit und Verfahren
DE102019212392A1 (de) * 2019-08-19 2021-02-25 Robert Bosch Gmbh Rotor mit einem Nutverschlusselement für eine elektrische Maschine
JP2021058035A (ja) * 2019-10-01 2021-04-08 株式会社日立産機システム 固定子及び回転電機
DE102019133580A1 (de) * 2019-12-09 2021-06-10 Bayerische Motoren Werke Aktiengesellschaft Elektrisch erregte Synchronmaschine mit Schenkelpolrotor und permanentmagnetischer Streuflussreduzierung
DE102020105600A1 (de) 2020-03-03 2021-09-09 Schaeffler Technologies AG & Co. KG Stator für eine elektrische Maschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE414386C (de) * 1921-08-13 1925-06-02 Siemens Schuckertwerke G M B H Nutenverschluss fuer elektrische Maschinen mit in der Laengsrichtung der Nut verlaufenden Trennfugen zwischen magnetisch leitenden Schichten
DE887675C (de) * 1951-08-09 1953-08-24 Siemens Ag Aus Metallpulver im Sinterverfahren hergestellter Verschlusskeil fuer die Nuten elektrischer Maschinen
DE2059971A1 (de) * 1970-12-05 1972-06-29 Otello Baldi Einrichtung,insbesondere fuer elektromagnetische Antriebe,Schalt- oder Steuer- oder Regelanlagen
JPS6110936A (ja) * 1984-06-26 1986-01-18 Toshiba Corp 磁性楔
EP1372242A2 (fr) * 2002-05-14 2003-12-17 AXIS S.p.A. Méthode et appareil pour le bobinage de composants de machines dynamo-électriques
US20040212256A1 (en) * 2003-04-25 2004-10-28 Kazushi Sugishima Armature and method for manufacturing armature

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE414386C (de) * 1921-08-13 1925-06-02 Siemens Schuckertwerke G M B H Nutenverschluss fuer elektrische Maschinen mit in der Laengsrichtung der Nut verlaufenden Trennfugen zwischen magnetisch leitenden Schichten
DE887675C (de) * 1951-08-09 1953-08-24 Siemens Ag Aus Metallpulver im Sinterverfahren hergestellter Verschlusskeil fuer die Nuten elektrischer Maschinen
DE2059971A1 (de) * 1970-12-05 1972-06-29 Otello Baldi Einrichtung,insbesondere fuer elektromagnetische Antriebe,Schalt- oder Steuer- oder Regelanlagen
JPS6110936A (ja) * 1984-06-26 1986-01-18 Toshiba Corp 磁性楔
EP1372242A2 (fr) * 2002-05-14 2003-12-17 AXIS S.p.A. Méthode et appareil pour le bobinage de composants de machines dynamo-électriques
US20040212256A1 (en) * 2003-04-25 2004-10-28 Kazushi Sugishima Armature and method for manufacturing armature

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 150 (E - 408) 31 May 1986 (1986-05-31) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8253298B2 (en) 2008-07-28 2012-08-28 Direct Drive Systems, Inc. Slot configuration of an electric machine
US8415854B2 (en) 2008-07-28 2013-04-09 Direct Drive Systems, Inc. Stator for an electric machine
US8421297B2 (en) * 2008-07-28 2013-04-16 Direct Drive Systems, Inc. Stator wedge for an electric machine
DE102013200454A1 (de) 2013-01-15 2014-07-31 Robert Bosch Gmbh Rotor für eine elektrische Maschine mit Nutverschlusselementen

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Publication number Publication date
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