WO2005091466A1 - Support d'enroulement d'une machine electrique - Google Patents

Support d'enroulement d'une machine electrique Download PDF

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Publication number
WO2005091466A1
WO2005091466A1 PCT/EP2005/050471 EP2005050471W WO2005091466A1 WO 2005091466 A1 WO2005091466 A1 WO 2005091466A1 EP 2005050471 W EP2005050471 W EP 2005050471W WO 2005091466 A1 WO2005091466 A1 WO 2005091466A1
Authority
WO
WIPO (PCT)
Prior art keywords
pole teeth
winding
tooth
winding support
groove
Prior art date
Application number
PCT/EP2005/050471
Other languages
German (de)
English (en)
Inventor
Samir Mahfoudh
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 WO2005091466A1 publication Critical patent/WO2005091466A1/fr

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Classifications

    • 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
    • H02K1/265—Shape, form or location of the slots
    • 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

Definitions

  • the invention is based on 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 groove between them, which can be filled with at least one winding each.
  • the at least one groove has a groove base that lies between two pole teeth.
  • the transition between the two pole teeth and the slot base is rounded and is a multiple of the thickness of individual sheets of the winding support, which is usually produced as a laminated core. This has the advantage that the punching tools for the
  • the winding carrier according to the invention for an electrical machine with the characterizing features of claim 1 has the advantage that the pole teeth can be bent up more easily, as a result of which a larger copper filling factor can be achieved compared to a winding carrier of comparable size, whereby higher performance can be achieved.
  • 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.
  • Transitions with a transition radius of less than 1 mm are preferably provided, since a good reduction in the section modulus is already achieved here. This reduction will be better if transitions with a transition radius of less than 0.5 mm are provided. Overall, it is advantageous if transitions are provided with a transition radius that is smaller than the thickness of a single sheet of the winding support. However, it is best for the section modulus if no transition radii are provided.
  • 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 with a device for producing the winding support, which has at least one device for bending at least one pole tooth.
  • the device has at least one device for bending two adjacent pole teeth. This means that a groove can be bent open even further.
  • 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 which take up a winding in pairs. Further advantages and advantageous further developments result from the subclaims and the description.
  • FIG. 1 shows an electrical machine in cross section
  • FIG. 2 shows an armature according to FIG. 1
  • FIG. 3 shows the armature according to FIG.
  • a rotating electrical machine 10 is shown in simplified form in a cross section.
  • the electrical machine 10 can be an electric motor that is used in a motor vehicle, for example in a seat adjuster, window regulator, 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.
  • the armature 14 with or without a shaft 16 thus represents a winding support for an electrical machine 10.
  • the armature 14 is produced 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 starts from the section 19, 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.
  • the transition from the bottom of the groove 25 to the tooth necks 22 or pole teeth 20 is essentially sharp-edged, ie it is not rounded as usual. Ideally, the transition is completely sharp. However, a transition radius of less than 1mm 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 that
  • 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.
  • Grooves 212 with 215, 213 with 216, 214 with 217, 215 with 218, 216 with 211, 217 with 212 and finally 218 with 213 also do this.
  • the 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.
  • the 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 undercuts 30 which delimit the undercut grooves 21.
  • the sections delimit slot slots 32, which have a width 34.
  • the transition from the tooth necks 22 to the undercuts 30 is essentially sharp-edged, i.e. it is not rounded as usual. Ideally, the transition is completely sharp. However, a transition radius of less than 1mm is still acceptable, with a transition radius of less than 0.5mm 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 method for producing the armature 14 for the electric motor 10 is explained in more detail with reference to FIG. 2.
  • the pole teeth 20 of the armature 14 are still in the installation position shown in FIG. 1 after the sheet-metal punch package has been produced.
  • the armature 14 can be inserted into the electric motor 10 in the installation division.
  • the directly adjacent pole teeth 208 and 201 as well as 203 and 204 are spread.
  • the grooves 211 and 214 delimited by the pole teeth 208 and 201 and 203 and 204 are thus enlarged.
  • the cross-sectional area of the grooves 211 and 214 is enlarged, for example, using 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. 3.
  • 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 if the grooves 21 are not undercut and it is pole teeth 20 without a tooth head 24.
  • the method is applied to the pole teeth 20 shown, each of which has 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 contactor 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, i.e. 45 ° - be it clockwise or
  • 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 return to their installation position after the force has been removed.
  • the reason for this is that the pole teeth 20, which are each bent, are bent in the elastic range and, after the winding 18 has been inserted, return to the installation position by removing the action of force due to their inherent elasticity or are returned to the installation position by their inherent elasticity.
  • the pole teeth 20, which are bent open can be bent in the plastic region instead of in the elastic region - or with portions in the elastic and plastic region - and after the winding 18 has been inserted 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 the directly adjacent pole teeth 20
  • 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.
  • these pole teeth are considered to be indirectly adjacent.
  • a winding 18 in the Slots 211 and 214 and at the same time a winding 18 are inserted into slots 218 and 215.
  • the armature 14 is then rotated clockwise or counterclockwise by 360 ° divided by the number of grooves 21, ie 45 °.
  • 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 groove 21 and that then at least one of the adjacent pole teeth 20 from the
  • FIG. 3 shows how the pole teeth 201, 208 and 203, 204 are bent open using two pliers 38, 40 of a device 42, which is only symbolic and is indicated as a cutout or partially indicated, for carrying out the described method.
  • 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 211.
  • a part such as a hook
  • 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 a winding 18 can be inserted in each of the slots 211 and 214 as well as 218 and 215.
  • 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.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne un support d'enroulement (14) d'une machine électrique (10) ayant plusieurs dents polaires (20). Les dents polaires (20) adjacentes délimitent entre elles au moins une rainure (21) qui peut être remplie respectivement d'au moins un enroulement (18). La ou les rainures (21) a/ont une base (25) située entre deux dents polaires (20). Au moins la transition entre les deux dents polaires (20) et la base de rainure (25) sont sensiblement anguleuses. Ainsi on a un faible moment de résistance, ce qui permet d'ouvrir plus facilement la rainure (21).
PCT/EP2005/050471 2004-03-17 2005-02-03 Support d'enroulement d'une machine electrique WO2005091466A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410012932 DE102004012932A1 (de) 2004-03-17 2004-03-17 Wicklungsträger für eine elektrische Maschine
DE102004012932.0 2004-03-17

Publications (1)

Publication Number Publication Date
WO2005091466A1 true WO2005091466A1 (fr) 2005-09-29

Family

ID=34960736

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/050471 WO2005091466A1 (fr) 2004-03-17 2005-02-03 Support d'enroulement d'une machine electrique

Country Status (2)

Country Link
DE (1) DE102004012932A1 (fr)
WO (1) WO2005091466A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2660124A2 (fr) * 1989-09-08 1991-09-27 Ecia Equip Composants Ind Auto Moteur electrique a commutation electronique a structure amelioree.
US5859487A (en) * 1997-05-30 1999-01-12 Delta Electronics, Inc. Stator structure of motor and its forming method
EP1047177A2 (fr) * 1999-04-07 2000-10-25 Mabuchi Motor Co., Ltd Moteur miniature et son procédé de fabrication
US6242835B1 (en) * 1998-03-06 2001-06-05 Asmo Co., Ltd. Core sheet, core and method of manufacturing an armature
EP1248347A1 (fr) * 2000-08-29 2002-10-09 Mitsubishi Denki Kabushiki Kaisha Noyau de stator a empilement, moteur rotatif et procedes de production correspondants

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2660124A2 (fr) * 1989-09-08 1991-09-27 Ecia Equip Composants Ind Auto Moteur electrique a commutation electronique a structure amelioree.
US5859487A (en) * 1997-05-30 1999-01-12 Delta Electronics, Inc. Stator structure of motor and its forming method
US6242835B1 (en) * 1998-03-06 2001-06-05 Asmo Co., Ltd. Core sheet, core and method of manufacturing an armature
EP1047177A2 (fr) * 1999-04-07 2000-10-25 Mabuchi Motor Co., Ltd Moteur miniature et son procédé de fabrication
EP1248347A1 (fr) * 2000-08-29 2002-10-09 Mitsubishi Denki Kabushiki Kaisha Noyau de stator a empilement, moteur rotatif et procedes de production correspondants

Also Published As

Publication number Publication date
DE102004012932A1 (de) 2005-10-06

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