EP2380263A2 - Procédé pour supprimer une couche de poudre électro-isolante se trouvant sur un fer statorique, dispositif servant à la mise en oeuvre de ce procédé, et machine électrique équipée d'un fer statorique - Google Patents

Procédé pour supprimer une couche de poudre électro-isolante se trouvant sur un fer statorique, dispositif servant à la mise en oeuvre de ce procédé, et machine électrique équipée d'un fer statorique

Info

Publication number
EP2380263A2
EP2380263A2 EP09808992A EP09808992A EP2380263A2 EP 2380263 A2 EP2380263 A2 EP 2380263A2 EP 09808992 A EP09808992 A EP 09808992A EP 09808992 A EP09808992 A EP 09808992A EP 2380263 A2 EP2380263 A2 EP 2380263A2
Authority
EP
European Patent Office
Prior art keywords
powder
stator iron
radially inwardly
inwardly directed
stator core
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.)
Withdrawn
Application number
EP09808992A
Other languages
German (de)
English (en)
Inventor
Alexander Mueller
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 EP2380263A2 publication Critical patent/EP2380263A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
    • B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
    • B08B1/34—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members rotating about an axis parallel to the surface

Definitions

  • US Pat. No. 6,856,052 B2 discloses a method and a device with which a stator iron can be provided with a powder coating.
  • the transport rollers disclosed there interact with the stator teeth, so that it can cause vibrations when turning the stator iron.
  • the inventive method is allowed to accumulate that the detached powder outside of the stator iron and not, for example, in the grooves of the stator iron, resulting in irregular
  • FIG. 1 shows a cross section through an electric machine
  • FIG. 2 shows a three-dimensional view of a stator iron
  • 3 shows a schematic method for removing an electrically insulating powder layered on a stator iron
  • FIG. 4 shows a first exemplary embodiment of the method according to the invention
  • FIG. 5 shows a second exemplary embodiment of the method according to the invention
  • FIG. 6 shows a third exemplary embodiment of the method according to the invention
  • Figure 7 shows a fourth embodiment of the method according to the invention
  • Figure 8 shows a first embodiment of a device according to the invention
  • Figure 9 shows a second embodiment of a device according to the invention.
  • FIG. 1 shows a cross section through an electrical machine 10, here in FIG.
  • This electric machine 10 has u. a. a two-part housing 13, which consists of a first bearing plate 13.1 and a second bearing plate 13.2.
  • the bearing plate 13.1 and the bearing plate 13.2 take in a so-called stator 16, on the one hand from an im
  • annular stator iron 17 is made, and in whose radially inwardly directed, axially extending grooves, a stator winding 18 is inserted.
  • This annular stator 16 surrounds with its radially inwardly directed grooved surface a rotor 20 which is formed as a claw-pole rotor.
  • the rotor 20 consists, inter alia, of two claw-pole plates 22 and 23, on whose outer circumference in each case axially extending claw-pole fingers 24 and 25 are arranged. Both claw-pole plates 22 and 23 are arranged in the rotor 20 such that their claw-pole fingers 24 and 25, which extend in the axial direction, alternate with one another on the circumference of the rotor 20.
  • the rotor 20 is rotatably supported in the respective end shields 13.1 and 13.2, respectively, by means of a shaft 27 and one respective rolling bearing 28 located on each side of the rotor.
  • the rotor 20 has a total of two axial end faces, on each of which a fan 30 is attached.
  • This fan 30 consists essentially of a plate-shaped or disc-shaped portion, emanating from the fan blades in a known manner.
  • These fans 30 serve to allow an air exchange between the outside of the electric machine 10 and the interior of the electric machine 10 via openings 40 in the end shields 13.1 and 13.2.
  • the openings 40 are provided essentially at the axial ends of the end shields 13.1 and 13.2, via which cooling air is sucked into the interior of the electric machine 10 by means of the fan 30.
  • Cooling air is accelerated radially outwards by the rotation of the fans 30 so that they can pass through the cooling-air-permeable winding overhang 45. By this effect, the winding overhang 45 is cooled. The cooling air takes after passing through the winding overhang 45 and after flowing around this winding overhang
  • Protective cap 47 for example, from a so-called slip ring assembly 49, which serves to supply a field winding 51 with excitation current.
  • a heat sink 53 Around this slip ring assembly 49 around a heat sink 53 is arranged, which acts as a positive heat sink here.
  • the bearing plate acts 13.2. Between the end plate 13.2 and the heat sink 53 is a
  • Connection plate 56 is arranged, which serves to connect arranged in the bearing plate 13.2 minus diodes 58 and not shown here in this illustration plus diodes in the heat sink 53 to each other and thus represent a known bridge circuit.
  • FIG. 2 shows a stator iron 17 before the stator winding 18 is inserted. It shows two in the axial direction z (central axis of the cylinder-ring-like body) facing away from each other end faces 60 and 63, a cylindrical outer surface 66. Furthermore, are radially inward aligned teeth 69 and radially inwardly open grooves 72 shown. The radially inwardly directed teeth 69 each have a radially inwardly directed surface 75. These surfaces 75 form a central substantially circular opening 78 of the stator iron 17. These grooves 72 and also the end faces 60 and 63 are coated with a powder 81 for electrical insulation. This powder 81 is used after a curing process to protect an inserted stator winding 18 from electrical contact with the electrically conductive material of the stator iron 17 and thus to avoid short circuits in the stator winding 18.
  • a coating of the surfaces 75 is not desirable, since on the one hand this is technically not necessary and on the other hand is nonsense, since it increases the gap between the rotor 20 and the stator 16 and thus the efficiency of the machine would be degraded.
  • the powder 81 is first by means of an electrostatic process on the end faces 60 and 63, the
  • step S1 a method for removing the electrically insulating powder 81 layered on the stator iron 16 (step S1).
  • the stator iron 17 is held in a holding device 84 according to FIG.
  • a brush 87 and / or a wiper lip 90 removes by rotation along the central opening 78 the powder 81 which adheres to the surfaces 75.
  • the powder 81 trickles due to gravity out of the central opening 78 and falls outside the central opening 78 in a collecting means 93 - here a shell 96, which is located directly below the central opening 78.
  • the removed powder 81 is thus received outside the central opening 78.
  • a brush 87 (brush device, alternatively or in addition to a wiper lip 90) removes by rotation relative to the central opening 78 the powder 81 which adheres to the surfaces 75.
  • the powder 81 trickles due to gravity in the central opening 78 and is of a suction 99 - stylized here by two tubes 102 - recorded.
  • the one-dot reference letters m represent the mass flow of aspirated powder 81.
  • the suction device 99 is represented by two relatively large tubes 105. These tubes 105 suck by means of annular openings 108 (mouth) to the powder 81, which is removed by means of a brush 87 (alternatively or in addition with a wiper lip 90). The annular openings 108 are located closer to
  • the powder 81 is removed from the surface 75 by means of a flow-generating device 111 and flow 114 generated thereby.
  • the stator iron 17 is held in a fixture 84.
  • the holding device 84 may be designed such that it is stationary and the brush 87 and / or the wiper lip 90 slides by rotation along the surfaces 75.
  • the holding device 84 can also rotate with the stator iron 17 and the brush 87 and / or the wiper lip 90 can slide in a fixed manner along the surfaces 75.
  • the axis z could also be inclined and likewise either the stator iron 17 or the brushing or wiper device could slide along the surfaces 75. More advantageous is a rotating stator iron, as this results in a better distribution of the powder 81.
  • FIGS. 8a to 8d the entire process sequence is shown very schematically: First, a stator iron 17 is inserted into a holding device 84, FIG. 8a. If necessary, the stator iron 17 is secured in the holding device 84 by means of clamping forces F, FIG. 8b. A powder dish 114 as part of a coating apparatus 115 is lifted through the central opening 78. In this case, an electrostatic field is present between the powder 81 located on the plate and the stator iron 17, which causes the powder 81 to deposit on the surface of the stator iron 17. According to Fig. 8c, the surfaces 75 of the teeth 69 are cleaned by the powder 81 and finally by means of a heater 117, the am
  • Fig. 8a-d thus shows an apparatus for performing the above-described method with a holding device 84 for holding the stator iron 17, wherein the stator iron 17 directed radially inward
  • Teeth 69 and radially inwardly open grooves 72 and the radially inwardly directed teeth 69 each have a radially inwardly directed surface 75 to form a central opening 78 of the stator iron 17, with a coating apparatus 115 for applying powder 81 to a stator iron 17th and a device for removing the powder 81 from a radially inward surface 75 and a device for receiving the removed powder 81, wherein the device (collecting means 93, suction device 99) for receiving the removed powder 81 is located outside the central opening 78 ,
  • a lifting device can raise and lower both a powder plate 114 and a tray 96 together. This would save time-consuming movement of the stator iron 17 from one to the next station.
  • the powder plate 114 and the shell 96 are mechanically coupled to each other and simultaneously movable by a coupling.
  • stator iron 17 is manufactured in compliance with the mentioned method steps and using the device described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

L'invention concerne un procédé pour supprimer une couche de poudre () électro-isolante se trouvant sur un fer statorique (17), ce fer statorique (17) étant pourvu de dents (69) dirigées radialement vers l'intérieur et de rainures (72) ouvertes radialement vers l'intérieur. En outre, les dents (69) dirigées radialement vers l'intérieur comportent respectivement une surface (75) dirigée radialement vers l'intérieur pour former une ouverture centrale (78) du fer statorique (17). Cette surface (75) est recouverte d'une poudre (81) à un stade du procédé (Z1). Selon l'invention, au cours d'une étape suivante (S1), la poudre est supprimée de cette surface (75), puis recueillie. Cette invention est caractérisée en ce que la poudre (81) est recueillie en dehors de l'ouverture centrale (78) du fer statorique (17). L'invention se rapporte en outre à un dispositif servant à la mise en oeuvre du procédé et à une machine électrique équipée d'un fer statorique (17) produit selon l'invention.
EP09808992A 2008-12-17 2009-12-15 Procédé pour supprimer une couche de poudre électro-isolante se trouvant sur un fer statorique, dispositif servant à la mise en oeuvre de ce procédé, et machine électrique équipée d'un fer statorique Withdrawn EP2380263A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008054810A DE102008054810A1 (de) 2008-12-17 2008-12-17 Verfahren zum Entfernen eines auf einem Ständereisen geschichteten, elektrisch isolierenden Pulvers, Vorrichtung zur Durchführung des Verfahrens sowie elektrische Maschine mit einem Ständereisen
PCT/EP2009/067169 WO2010069948A2 (fr) 2008-12-17 2009-12-15 Procédé pour supprimer une couche de poudre électro-isolante se trouvant sur un fer statorique, dispositif servant à la mise en oeuvre de ce procédé, et machine électrique équipée d'un fer statorique

Publications (1)

Publication Number Publication Date
EP2380263A2 true EP2380263A2 (fr) 2011-10-26

Family

ID=42193913

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09808992A Withdrawn EP2380263A2 (fr) 2008-12-17 2009-12-15 Procédé pour supprimer une couche de poudre électro-isolante se trouvant sur un fer statorique, dispositif servant à la mise en oeuvre de ce procédé, et machine électrique équipée d'un fer statorique

Country Status (5)

Country Link
EP (1) EP2380263A2 (fr)
CN (1) CN102318170A (fr)
BR (1) BRPI0923044A2 (fr)
DE (1) DE102008054810A1 (fr)
WO (1) WO2010069948A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104588376B (zh) * 2014-11-25 2016-06-29 合肥通用机械研究院 用于螺杆钻具马达定子的橡胶破碎清除装置
DE102015225758A1 (de) 2015-12-17 2017-06-22 Robert Bosch Gmbh Verfahren zum Beschichten eines elektromagnetisch erregbaren Kerns
DE102018121708A1 (de) * 2018-09-05 2020-03-05 Vaf Gmbh Reinigungsvorrichtung und Verfahren zum Reinigen eines im Tauchverfahren beschichteten Körpers
CN111992546B (zh) * 2020-08-28 2021-12-03 无锡中车时代智能装备有限公司 电机定子铁芯内槽的自动清洗机
CN113037034B (zh) * 2021-02-24 2022-07-29 北京航天控制仪器研究所 一种铁芯热浸涂敷工装、系统及方法
CN113036976A (zh) * 2021-03-04 2021-06-25 卓尔博（宁波）精密机电股份有限公司 一种高绝缘性电机定子

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19644360C2 (de) * 1996-10-25 2002-01-03 Pbs Pulverbeschichtungs Und Sp Farbsprühkabine mit Düsen zur Erzeugung horizontal gerichteter Querluftströme
JP3501395B2 (ja) * 1999-06-01 2004-03-02 日本電産株式会社 静電粉体塗装装置
US6827780B2 (en) * 2001-03-06 2004-12-07 Nordson Corporation Method and apparatus for powder coating hollow objects
JP3882624B2 (ja) * 2002-01-29 2007-02-21 三菱電機株式会社 固定子コアとその製造方法とその製造装置
DE10333187A1 (de) * 2003-07-22 2005-03-03 Robert Bosch Gmbh Verfahren zum Aufbringen einer elektrischen Isolierung
US7981465B2 (en) * 2007-01-16 2011-07-19 Globe Motors, Inc. Method and apparatus for powder coating stator stacks

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010069948A3 *

Also Published As

Publication number Publication date
WO2010069948A2 (fr) 2010-06-24
CN102318170A (zh) 2012-01-11
BRPI0923044A2 (pt) 2015-12-15
DE102008054810A1 (de) 2010-06-24
WO2010069948A3 (fr) 2011-07-07

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