WO2014032149A2 - Procédé de fabrication d'un stator de machine dynamo-électrique - Google Patents

Procédé de fabrication d'un stator de machine dynamo-électrique Download PDF

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Publication number
WO2014032149A2
WO2014032149A2 PCT/BR2013/000332 BR2013000332W WO2014032149A2 WO 2014032149 A2 WO2014032149 A2 WO 2014032149A2 BR 2013000332 W BR2013000332 W BR 2013000332W WO 2014032149 A2 WO2014032149 A2 WO 2014032149A2
Authority
WO
WIPO (PCT)
Prior art keywords
stator
shafts
side flaps
dynamo
electric machine
Prior art date
Application number
PCT/BR2013/000332
Other languages
English (en)
Other versions
WO2014032149A3 (fr
Inventor
João Victor LINDROTH
Anderson Wolf
Evandro SPECKHAHN
Original Assignee
Whirlpool S.A.
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 Whirlpool S.A. filed Critical Whirlpool S.A.
Priority to EP13762377.3A priority Critical patent/EP2891231A2/fr
Priority to CN201380055083.8A priority patent/CN104737426A/zh
Priority to MX2015002745A priority patent/MX2015002745A/es
Publication of WO2014032149A2 publication Critical patent/WO2014032149A2/fr
Publication of WO2014032149A3 publication Critical patent/WO2014032149A3/fr

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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
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the slots

Definitions

  • the present invention relates to an optimized process for manufacturing dynamo- electric machine stator.
  • the present invention discloses a novel whole process for manufacturing dynamo-electric machine stator, this process being comprised by a plurality of steps which provide the change of the rolled raw material to the final formation of the stator itself.
  • dynamo-electric machines comprise machines capable of transforming electrical energy into mechanical energy (electric motor, for example) or mechanical energy into electrical energy (voltage generator, for example).
  • the dynamo-electric machines are integrated by fixed inductive cores and moving inductive cores, and they have their functional principle based on electromagnetic induction principles, where the magnetic fields created by inductive cores are capable of generating movement in the moving inductive cores.
  • the fixed inductive cores are arranged in the stator, while the moving inductive cores are arranged in the rotor.
  • the stator of a dynamo-electric machine is mainly integrated by a metal frame and a plurality of coils (electrical conductors arranged on a surround manner around a shaft), the coils being are arranged in alignment in relation to the metal frame.
  • the metal frame of a stator defines radial shafts circumferentially spaced and circumferentially joined together by their upper ends (the lower ends being spaced from each other). These shafts ultimately define structures in which electrical conductors are wound, and the spaces between these shafts have the function of housing the volume formed by the electrical conductors. In this sense, it is possible to note that each shaft and its respective coil conform a fixed inductive core.
  • the rotor (whose physical embodiment is similar to the physical embodiment of the stator) is mounted inside the stator, and due to this, the shafts of the metal frame of the stator have a length dimensioned to conform an empty central space, such space intended that the reception of the rotor.
  • Figure 1 shows a plan and schematic view of a dynamo-electric machine stator according to a conventional embodiment belonging to the current state of the art.
  • stator and the rotor of a same dynamo-electric machine can be obtained from a same metal monoblock, since the rotor has dimensions substantially equivalent to the empty space of the existing in the center of the stator.
  • handling of metal monoblocks consists of complex industrial processes, which produce results of questionable quality.
  • the area of the electrical conductors that conform the coils of the stator comprises a feature capable of influencing the efficiency of the dynamo-electric machine. More specifically, it is known that electrical conductors of smaller area are more susceptible to the occurrence of Joule effect, besides the intrinsic limitation on the nominal value of the electric current that these conductors support. Therefore, there is an interest that electrical conductors that conform the coils of the stator exhibit the largest possible area (within the needs of each project).
  • the area of the electrical conductors that conform the coils of the stator tends to be limited by characteristics of the metal frame of the stator.
  • each shaft XE of the stator blade XL has a final end defined by two side flaps XAL. Therefore, the area of the electrical conductors that conform the coils of the stator ends up being limited to the space existing between the side flaps XAL of consecutive shafts XE.
  • the aforementioned space between the side flaps XAL of consecutive shaft XE also comprises a feature capable of influencing the efficiency of the dynamo-electric machine, this because the higher this spacing, the higher the magnetic dispersion of the inductive core and, consequently, the higher the yield loss of the dynamo- electric machine (relationship between the amount of electrical energy transformed into mechanical energy or vice versa). Therefore, so that a dynamo-electric machine is effective, there must be a balance between the area of the electrical conductors that conform the coils of the stator and the magnetic dispersion of the inductive core provided by the space existing between the side flaps of consecutive shafts. However, achieving this balance is extremely complex.
  • Document PI 9702724-3 describes an optimized embodiment of blade of stator of electric motor.
  • the side flaps of the shafts are able to be handled during the process for manufacturing stator, thereby allowing the "opening” and “closure” of the housing channels of electrical conductors. More particularly, it is noted that the "opening” and “closure” of the channels occur through the pivoting of the side flaps of the shafts.
  • the great negative aspect referring to the embodiment described in document PI 9702724-3 refers to the pivoting need of the side flaps of the shafts to close and, above all, to open the channels, after all, it is extremely complex to grouping multiple blades whose side flaps of the shafts are pivoted.
  • the "opening" of the channels is performed in a puncture device, where each channel is invaded by a punch tool, and each of the lower ends of the shafts is supported in a sort of template deformation.
  • the movement (from inside outwards) of the puncture tool forces the side flaps of the shafts against the template, and this cause said side flaps to assume the shape of said template.
  • the side flaps of the shafts of the blades are deformed in the stamping step itself.
  • said lateral flaps of the shafts are functionally deformed only after removal of the "waste" to be used for conforming the rotor of the dynamo-electric machine.
  • dynamo-electric machine stator which comprises at least one stamping step of raw material, at least one grouping step of multiple stator blades, at least one conforming step of the inductive cores in the housing channels of electrical conductors, and at least one closing step of the housing channels of electrical conductors.
  • Said process for manufacturing dynamo-electric machine stator according to the present invention further provides at least one deformation sub-step of the side flaps of the shafts of stator blade and at least one gauging step of the side flaps of the shafts of the multiple stator blades.
  • the deformation sub-step of the side flaps of the shafts of the stator blade is performed during the stamping step of the raw-material.
  • the gauging step of the side flaps of the shafts of the multiple stator blades is performed after the closure step of the housing channels of electrical conductors.
  • each stator blade is individually subjected to the deformation sub-step of the side flaps of the shafts of the stator blade.
  • the deformation sub-step of the side flaps of the shafts of the stator blade comprises a last sub-step of the stamping step of raw-material.
  • the stamping step of raw-material by the end of the stamping step of raw-material, there are obtained stator blades which, when grouped, define housing channels of electrical conductors previously opened.
  • the gauging step of the side flaps of the shafts of the multiple stator blades provides the standardized circular alignment of all the shafts of all the multiple stator blades.
  • the gauging step of the side flaps of the shafts of the multiple stator blades comprises a step of fine tuning through controlled physical deformation, which is, also preferably, the final step of the process for manufacturing dynamo-electric machine stator.
  • Figure 1 illustrates one embodiment of stator blade of dynamo-electric machine according to the concepts already provided by the current state of the art
  • Figure 2 illustrates in schematic form the flow chart of the process for manufacturing dynamo-electric machine stator according to the present invention
  • FIG. 3 illustrates an example of stator blade obtained after conclusion of the stamping step of raw material according to the present invention
  • Figure 4 illustrates a schematic section of the stator obtained after conclusion of the gauging step of the side flaps of the shafts of the stator according to the present invention.
  • the present invention differentiates, after all, it is provided and detailed herein a process for manufacturing dynamo-electric machine stator that, after the conforming step of the stator blades (stamping step), is free from any kind of additional stage of "opening" of the housing channels of electrical conductors.
  • stator blade obtained at the end of the stamping step is equivalent to the exemplification of Figure 3, where there is illustrated a stator blade 1 provided with a plurality of shafts 4, which are radially arranged and have each two side flaps 5 arranged in his lower ends 6.
  • stator blades 1 when properly grouped, conform the metal frame of the stator, defining housing channels 2 for electrical conductors 3 (as shown in Figure 4).
  • the fundamental concept of this type of blade, as well as the physical embodiment illustrated in Figure 3 is within the knowledge of those skilled in the subject.
  • Stamping step A of raw material which also provides a deformation sub-step A1 of the side flaps 5 of the shafts 4 of the stator blade 1 ;
  • One of the merits of the present invention is directly related to the existence of the sub-step A1 , which occurs within the stamping tool.
  • stamping step A of raw material can provide many conventional sub-steps (removal of the portion to be used for manufacturing the rotor blade, definition of alignment points, definition of the area of the housing channels 2, among others), and irrespective of the number thereof, be complemented by the sub-step A1.
  • Said sub-step A1 consists, in general, of the simultaneous physical deformation of the side flaps 5 of the shafts 4 of a stator blade 1.
  • the means used to cause this simultaneous physical may comprise several and already known means, provided that functionally aggregated to the machinery.
  • each stator blade 1 is individually subjected to the sub-step A1 , and preferably, the sub-step A1 comprises the last sub-step of step A.
  • Sub-step A1 allows that, at the end of step A, there are obtained stator blades 1 which, when grouped, define housing channels 2 of electrical conductors 3 previously opened. Therefore, the first objective of the present invention (process for manufacturing dynamo-electric machine stator that, after the conforming step of the stator blades (stamping step), is free of any kind of additional "opening" step of the housing channels of electrical conductors) is fully achieved.
  • steps B, C and D already comprises the current state of the art. Thus, there is no need to describe them in details.
  • steps B, C and D it is obtained a substantially conventional dynamo-electric machine stator and, therefore, functional.
  • step D (where it is performed the closure of housing channels 2 of electrical conductors 3 through physical deformation of side flaps 5 of shafts 4 of the metal frame of the stator) is not always able to provide a ideal "finishing" to lower ends 6 of all shafts 4 of all multiple stator blades 1 , preventing the decrease of the radial clearance between stator and rotor that is critical for the increase of the driving electric efficiency.
  • step E it is another merit of the present invention to disclose the gauging step E of side flaps 5 of shafts 4 of multiple stator blades 1.
  • the aforementioned step E consists of the standardized circular alignment 7 of lower ends 6 of all shafts 4 of all multiple stator blades 1. This "circular alignment" is schematically illustrated in figure 4 by means of the dashed circumference and also indicated by reference 7.
  • This standardized circular alignment is essentially performed through the controlled physical deformation (of fine tuning) of side flaps 5 of shafts 4 of multiple stator blades 1.
  • the means used to cause this controlled physical deformation may comprise various and already conventional means, provided that they do not involve any type of chopping wear (friction) or the like.
  • step E also ensures the inductive cores of the stator with substantially equivalent electromagnetic fields, since step E ensures that all housing channels 2 of electrical conductors 3 have a standardized "closure".
  • step E ensures that all housing channels 2 of electrical conductors 3 have a standardized "closure”.

Landscapes

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

Abstract

La présente invention concerne un procédé de fabrication d'un stator pour machine dynamo-électrique, qui, après l'étape de conformation de la carcasse métallique du stator, est exempte de toute étape d'ouverture supplémentaire de canaux de logement (2) de conducteurs électriques (3). Par conséquent, des rabats latéraux (5) d'arbres (4) d'aubes de stator (1) sont déformés dans l'étape d'estampage elle-même. En outre, le procédé décrit ici concerne également une étape de calibrage des rabats latéraux (5) d'arbres (4) de multiples aubes de stator (1) qui assure l'alignement circulaire normalisé (7) des extrémités inférieures (6) de tous les arbres (4) de toutes les multiples aubes (1) de stator.
PCT/BR2013/000332 2012-08-31 2013-08-28 Procédé de fabrication d'un stator de machine dynamo-électrique WO2014032149A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP13762377.3A EP2891231A2 (fr) 2012-08-31 2013-08-28 Procédé de fabrication d'un stator d'une machine électrique
CN201380055083.8A CN104737426A (zh) 2012-08-31 2013-08-28 制造电动发电机定子的方法
MX2015002745A MX2015002745A (es) 2012-08-31 2013-08-28 Procedimiento para fabricar un estator de maquina eléctrica.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR102012022081A BR102012022081A2 (pt) 2012-08-31 2012-08-31 Processo de confecção de estator de máquina dínamo-elétrica
BRBR1020120220814 2012-08-31

Publications (2)

Publication Number Publication Date
WO2014032149A2 true WO2014032149A2 (fr) 2014-03-06
WO2014032149A3 WO2014032149A3 (fr) 2014-10-16

Family

ID=50184497

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2013/000332 WO2014032149A2 (fr) 2012-08-31 2013-08-28 Procédé de fabrication d'un stator de machine dynamo-électrique

Country Status (5)

Country Link
EP (1) EP2891231A2 (fr)
CN (1) CN104737426A (fr)
BR (1) BR102012022081A2 (fr)
MX (1) MX2015002745A (fr)
WO (1) WO2014032149A2 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176444A (en) * 1977-09-19 1979-12-04 Industra Products, Inc. Method and apparatus for assembling dynamoelectric machine stators
DE2848618A1 (de) * 1978-11-09 1980-05-22 Bosch Gmbh Robert Elektrische maschine und verfahren zu ihrer herstellung
JPS63178746A (ja) * 1987-01-19 1988-07-22 Jeco Co Ltd 小型モ−タ−に於ける回転子コアの巻線方法
EP1530280A2 (fr) * 2003-11-10 2005-05-11 Makita Corporation Procédé et dispositif de fabrication de moteurs

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9702724A (pt) * 1997-08-05 1999-03-09 Brasil Compressores Sa Estator de motor elétrico
JP2001136701A (ja) * 1999-08-23 2001-05-18 Asmo Co Ltd コア及び電機子の製造方法
JP2009284707A (ja) * 2008-05-23 2009-12-03 Mitsubishi Electric Corp 回転電機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176444A (en) * 1977-09-19 1979-12-04 Industra Products, Inc. Method and apparatus for assembling dynamoelectric machine stators
DE2848618A1 (de) * 1978-11-09 1980-05-22 Bosch Gmbh Robert Elektrische maschine und verfahren zu ihrer herstellung
JPS63178746A (ja) * 1987-01-19 1988-07-22 Jeco Co Ltd 小型モ−タ−に於ける回転子コアの巻線方法
EP1530280A2 (fr) * 2003-11-10 2005-05-11 Makita Corporation Procédé et dispositif de fabrication de moteurs

Also Published As

Publication number Publication date
WO2014032149A3 (fr) 2014-10-16
BR102012022081A2 (pt) 2014-08-05
CN104737426A (zh) 2015-06-24
MX2015002745A (es) 2015-09-23
EP2891231A2 (fr) 2015-07-08

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