EP1735897A1 - Procede de production d'un support d'enroulement d'une machine electrique - Google Patents

Procede de production d'un support d'enroulement d'une machine electrique

Info

Publication number
EP1735897A1
EP1735897A1 EP05707836A EP05707836A EP1735897A1 EP 1735897 A1 EP1735897 A1 EP 1735897A1 EP 05707836 A EP05707836 A EP 05707836A EP 05707836 A EP05707836 A EP 05707836A EP 1735897 A1 EP1735897 A1 EP 1735897A1
Authority
EP
European Patent Office
Prior art keywords
pole teeth
winding
tooth
bent
pole
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
EP05707836A
Other languages
German (de)
English (en)
Inventor
Samir Mahfoudh
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 EP1735897A1 publication Critical patent/EP1735897A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/08—Forming windings by laying conductors into or around core parts
    • H02K15/095—Forming windings by laying conductors into or around core parts by laying conductors around salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/08—Forming windings by laying conductors into or around core parts
    • H02K15/09—Forming windings by laying conductors into or around core parts by laying conductors into slotted rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/26—Rotor cores with slots for windings
    • 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
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/527—Fastening salient pole windings or connections thereto applicable to rotors only
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core

Definitions

  • the invention is based on a ner driving for producing a winding support for an electrical machine according to the preamble of claim 1.
  • a winding support has a plurality of pole teeth. Adjacent pole teeth delimit at least one slot between them, into each of which at least one winding is inserted. Even before the slots are filled with the winding, the pole teeth have the later mounting position for installation in the electrical machine. The winding is also inserted in this installation position. This already determines which copper fill factor the winding support or the electrical one
  • the Machine can have maximum.
  • the copper fill factor is also an indication of engine performance.
  • the method according to the invention for producing a winding support for an electrical machine with the characterizing features of patent claim 1 has the advantage that, compared to a winding support of comparable size, a higher output can be achieved by a higher copper fill factor.
  • a method for producing a winding support for an electrical machine which has a plurality of pole teeth, with adjacent pole teeth delimiting between them at least one groove, which is filled with at least one winding in each case, the pole teeth in an installation position for installation in the electrical machine have each other, at least one of the pole teeth, which delimit a groove, before filling with the winding by the action of a force in a Filling position is bent so that the cross-sectional area of the at least one TSTut, which it delimits, is enlarged, the groove then being filled with the winding and then the at least one of the adjacent pole teeth being brought from the filling position into the installation position.
  • the action of force preferably acts directly on the pole teeth. This makes it possible to influence the process more precisely.
  • the at least one pole tooth that is bent is bent in the elastic region and, after the winding has been inserted, returns to it by removing the action of force due to its inherent elasticity
  • the at least one pole tooth which is bent open, is bent in the plastic region and after the
  • pole teeth between which another pole tooth is arranged, are bent open by increasing the distance between them, either two adjacent slots can be provided with windings at the same time, or a single tooth winding can be attached to the pole tooth located between them.
  • the best filling with a winding can be achieved if the pole teeth are bent up by two pairs of grooves that receive at least this winding, then the winding is inserted so that the pole teeth then clockwise or counterclockwise each time directly or indirectly following at least one winding of at least one winding be bent up until the
  • Winding carrier is completely provided with windings.
  • the pole teeth each comprise a tooth neck and a tooth head, the tooth heads having sections which project transversely to the tooth necks and the undercuts of undercut grooves
  • a winding carrier which is produced by such a method has a particularly high copper precipitation factor.
  • winding support _____ at least the transition from the slot base lying between two pole teeth to the pole teeth is formed with sharp edges, the result is a lower section modulus of the pole teeth. This reduces the force required for bending.
  • the pole teeth each comprise a tooth neck and a tooth head, the tooth heads having sections which project transversely to the tooth necks and form undercuts from undercut slots, the transitions from the pole teeth to the
  • such a winding carrier is an armature of an inner rotor or the stator of an outer rotor, in which the pole teeth are directed radially outward, since the pole teeth can be easily bent open here.
  • An electrical machine with such a winding carrier has a higher output than an electrical machine of comparable size due to the higher copper filling factor.
  • the method can be carried out easily.
  • An additional improvement of the device is achieved if the device has at least one device for bending two adjacent pole teeth.
  • a further improvement of this device is achieved if the device has at least one device which bends two pole teeth of two slots into which a winding is inserted. This makes it particularly easy to bend slots that assume a winding in pairs.
  • FIG. 2 shows an anchor according to FIG. 1
  • Figure 3 shows the armature of Figure 1 with symbolically shown windings
  • Figure 4 shows the anchor of Figure 1 on a very simplified
  • a rotating electrical machine 10 is shown in simplified cross-section.
  • the electrical machine 10 may be an electric motor that is used in a motor vehicle, for example in a seat adjuster, window lifter, wiper drive, etc. However, it can also be a generator.
  • An armature 14 is arranged in the housing 12 and is arranged on a shaft 16.
  • Armature 14 with or without shaft 16 thus represents a winding support for an electrical machine 10.
  • Armature 14 is manufactured as a lamella package made of sheet metal or of what is known as SMC material (Soft Magnetic Composite).
  • SMC material Soft Magnetic Composite
  • the thickness of a single sheet is 0.5 mm, which can include deviations in the tenth of a millimeter range.
  • the armature 14 has a plurality of windings 18. For better clarity, only one winding 18 is shown schematically in FIG.
  • a plurality of pole teeth 20 protrude radially outward from a circular section 19 of the armature 14 and delimit or form slots 21 for receiving the windings 18.
  • the pole teeth 20 each comprise a tooth neck 22, which is from
  • Section 19 starts, and a tooth head 24, which adjoins the tooth neck 22.
  • the groove base 25 of a groove 21 is formed on the outer circumference of section 19 between the tooth necks 22.
  • transition is completely sharp. However, a transition radius of less than 1m is still acceptable, with a transition radius of less than 0.5mm being preferred.
  • the transition is preferably sharp-edged. A radius that is smaller than the thickness of a single sheet (also reference number 14) of the
  • Anchor 14 however, already leads to good results when bending.
  • the thickness is typically around 0.5 mm, for example, but can be a few tenths of a millimeter more or less.
  • the groove 211 receives a common winding 18 with the groove 214 in pairs.
  • the grooves 212 with 215, 213 with 216, 214 with 21 ⁇ 7, 215 with 218, 216 with £ 211, 217 with 212 and finally 218 with 213 also do this in each case. This will be explained in more detail in FIG.
  • tooth necks 22 are preferably evenly distributed around the circumference of the armature 14 and stand straight, i.e. they have no curved course. But it is also conceivable that they have a curved course.
  • tooth necks 22 have a substantially constant width. Alternatively, the width can also vary, i.e. become narrower from the inside out but also wider.
  • the tooth heads 24 have sections 28 which project transversely to the tooth necks 22 and point away from one another.
  • the sections 28 form a shoulder 30 which delimit the undercut grooves 21.
  • the> sections limit slot slots 32, which have a width 34.
  • the transition from the tooth necks 22 to the undercuts 30 is essentially formed with sharp edges, ie. it is not rounded as usual. Ideally, the transition is completely sharp. However, a transition radius of less than 1 mm is still acceptable, with a transition radius of less than 0.5 mm being preferred. The transition is preferably sharp-edged. However, a radius that is smaller than the thickness of a single sheet (also reference number 14) of the armature 14 also leads to good results when bending. The thickness is typically around 0.5 mm, for example, but can be a few tenths of a millimeter more or less.
  • the pole teeth 20 of the armature 14 are still in the installation position shown in FIG. In the installed position, the armature 14 can be inserted into the electric motor 10.
  • the directly adjacent pole teeth 208 and 201 and 203 and 204 are spread. So that of the Pole teeth 208 and 201 and 203 and 204 delimited grooves 211 and 214 enlarged.
  • the cross-sectional area of the grooves 211 and 214 is enlarged, for example, with a tool which engages in recesses on the circumference of the pole teeth 20, as a result of which a force can be exerted by arrows 36. This will be explained in more detail in FIG. 4.
  • the position then reached by the pole teeth 20 is referred to below as the filling position.
  • the winding 18 can either be done by winding itself or by inserting a prefabricated air coil. The insertion of an air coil is advantageous when the grooves 21 are not undercut and it is pole teeth 20 without a tooth head 24. However, the method is preferred for those shown
  • Pole teeth 20 are used, each having a tooth neck 22 and a tooth head 24 with the sections 28 projecting transversely to the tooth neck 22, which form the useful slots 32.
  • at least the width 34 of the useful slot 32 is essentially increased in order to insert the windings 18.
  • the armature 14 is rotated through 360 ° divided by the number of grooves 21, ie. 45 ° - be it clockwise or counterclockwise, according to FIG. 2 counterclockwise - and the pole teeth 201 and 202 as well as 204 and 205 are brought into the filling position.
  • the slots 212 and 215 lying in between are provided with the winding 18 and brought back into the installation position.
  • the pole teeth 202 and 203 and 205 and 206 are spread, the grooves 213 and between
  • the pole teeth 20 are bent up in each case with two grooves 21 receiving a winding, then the windings 18 are inserted and then the clock teeth 20 are bent in clockwise or counterclockwise direction in each case in the following grooves 21 receiving a winding 18 in pairs until the armature 14 is completely provided with windings 18 is.
  • the pole teeth 20 After removing the force, the pole teeth 20 return to their egg-building position.
  • the reason for this is that the pole teeth 20, which are each bent, are bent in the elastic region and, after the winding 18 has been inserted, return to the installation position due to their inherent elasticity, or return to the installation position due to their inherent elasticity
  • pole teeth 20 which are bent open are bent in the plastic area instead of in the elastic area - or with portions in the elastic and plastic area - and after inserting the winding 18 by reversing the action of force 36 by plastic deformation be brought back into the installation position. Since the pole teeth 20 are spread further apart in the plastic area than in the elastic area, the cross-sectional area of the slots 21 also increases in each case, as a result of which more turns of the winding 18 can be accommodated.
  • pole teeth 20, between which at least one further pole tooth 20 is arranged can be bent open by increasing the distance between them.
  • the pole teeth 201 and 203 can be bent open, the pole tooth 202 initially not being bent.
  • the pole teeth 205 and 207 can also be bent, the pole tooth 206 likewise not initially being bent. In the present context, these pole teeth are considered to be indirectly adjacent. Then a winding 18 is inserted into the slots 211 and 214 and at the same time a winding 18 is inserted into the slots 218 and 215. Thereafter, the anchor 14 turns clockwise or counterclockwise divided by 360 ° by the number of grooves 21, ie rotated 45 °. However, the anchor 14 only has to be rotated three times by the double winding.
  • At least one of the pole teeth 20, which delimit a slot 21 is bent into a filling position by a force before the slot 21 is filled with the winding 18, so that the cross-sectional area of the at least one slot 21, which it delimits, increases is that the winding 18 is then inserted into the slot 21 and that the at least one of the adjacent pole teeth 20 is then brought from the filling position into the installation position.
  • the winding lies around the pole teeth 201 and 203 and in the slots 211 and 214
  • windings 18 were successively attacked in the sequence 181, 182, 183, 184, 85, 186, 186, 188.
  • Both pole teeth 20 defining a groove 21 were bent open.
  • the advantage here is that the groove 21 can be bent open, which allows a higher degree of filling.
  • the following windings can be wound in parallel: 181 with 185, 182 with 186, 183 with 187, 184 with 188.
  • the advantage here is that two windings 18 can be filled together, which reduces the process time.
  • FIG. 4 shows how the pole teeth 201, 208 and 203, 204 are bent open with two pliers 38, 40 of a device 42 for carrying out the described method, which is only symbolic and as a cutout or partially indicated.
  • the device 42 should have at least one device 38, 40 for bending at least one pole tooth 20, because it is also possible that, for example, only the pole tooth 201 is bent alone.
  • the device 42 preferably has at least one device in the form of, for example, a part, such as a hook, of the pliers 38 or 40 for bending two adjacent pole teeth 201 and 208 of the groove
  • the device 42 - as shown - has at least one device 38, 40 which bends two pole teeth 201 and 208 and 203 and 204 of two slots 211 and 214 into which a winding 18 is inserted in pairs.
  • the pliers 38, 40 can also bend the pole teeth 201 and 207 as well as 203 and 204, the pole teeth 204 and 208 remaining straight, so that the
  • Slots 211 and 214 and 218 and 215 each have a winding 18 can be inserted. Of course, as described above, the other grooves 21 are then wound sequentially.
  • the anchor 14 can be fixed, for example, via the shaft 16.
  • the invention is not limited to winding carriers in the form of the armature 14. As can be seen directly from the illustration, it can also be a stator or stator of an external rotor motor or generator instead of an armature. Furthermore, the pole teeth need not point radially outward as shown. For example, they can point inwards from a larger round section 19, as is the case, for example, with stators of generators or electronically commutated electric motors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Windings For Motors And Generators (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne un procédé de production d'un support d'enroulement (14), d'une machine électrique (10), pourvu de plusieurs dents polaires (20). Des dents polaires (201, 208) adjacentes délimitent entre elles au moins une rainure (211) qui est respectivement remplie d'au moins un enroulement (18). Avant le remplissage, les dents polaires (201, 208) ont les unes par rapport aux autres une position de montage destinée au montage dans la machine électrique (10). Au moins une des dents polaires (201, 208) qui délimentent une rainure (211), est, avant le remplissage de la ou des rainure(s) (211) par l'enroulement (181), pliée dans une position de remplissage par une force (36) de manière à augmenter la surface de la section transversale de la ou des rainure(s) (211) délimitée. Puis l'enroulement (181) est inséré dans la rainure (211). Enfin, la ou les dents (201, 208) adjacentes sont ramenées de leur position de remplissage à leur position de montage. Cela permet d'obtenir un pourcentage de cuivre plus élevé et donc une puissance plus élevée de la machine (10).
EP05707836A 2004-03-17 2005-01-24 Procede de production d'un support d'enroulement d'une machine electrique Ceased EP1735897A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004012925A DE102004012925A1 (de) 2004-03-17 2004-03-17 Verfahren zum Herstellen eines Wicklungsträgers für eine elektrische Maschine
PCT/EP2005/050296 WO2005091473A1 (fr) 2004-03-17 2005-01-24 Procede de production d'un support d'enroulement d'une machine electrique

Publications (1)

Publication Number Publication Date
EP1735897A1 true EP1735897A1 (fr) 2006-12-27

Family

ID=34960306

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05707836A Ceased EP1735897A1 (fr) 2004-03-17 2005-01-24 Procede de production d'un support d'enroulement d'une machine electrique

Country Status (7)

Country Link
US (1) US20070180685A1 (fr)
EP (1) EP1735897A1 (fr)
JP (1) JP2007529978A (fr)
CN (1) CN1934769A (fr)
BR (1) BRPI0508026A (fr)
DE (1) DE102004012925A1 (fr)
WO (1) WO2005091473A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008000624A1 (de) * 2008-03-12 2009-09-17 Robert Bosch Gmbh Elektrische Maschine mit einem Rotor, sowie Verfahren zum Betreiben der elektrischen Maschine
DE102008001127A1 (de) 2008-04-11 2009-10-15 Robert Bosch Gmbh Statorwicklung und Verfahren zu ihrer Herstellung
CN203078469U (zh) * 2012-01-20 2013-07-24 德昌电机(深圳)有限公司 安全带舌板驱动器
CN203078472U (zh) * 2012-01-20 2013-07-24 德昌电机(深圳)有限公司 安全带带扣组件

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1756672A (en) * 1922-10-12 1930-04-29 Allis Louis Co Dynamo-electric machine
US4267719A (en) * 1977-09-19 1981-05-19 Industra Products, Inc. Apparatus for assembling dynamoelectric machine stators
JPS6087639A (ja) * 1983-10-19 1985-05-17 Nippon Denso Co Ltd 車輌用交流発電機
US6851175B2 (en) * 2001-09-12 2005-02-08 Delphi Technologies, Inc. Wound stator core and method of making

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005091473A1 *

Also Published As

Publication number Publication date
JP2007529978A (ja) 2007-10-25
BRPI0508026A (fr) 2007-07-03
CN1934769A (zh) 2007-03-21
DE102004012925A1 (de) 2005-10-06
US20070180685A1 (en) 2007-08-09
WO2005091473A1 (fr) 2005-09-29

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