EP2891230A2 - Methode et système de déformation des points de dents et des encoches d'un stator d'une machine dynamo-électrique - Google Patents

Methode et système de déformation des points de dents et des encoches d'un stator d'une machine dynamo-électrique

Info

Publication number
EP2891230A2
EP2891230A2 EP13762376.5A EP13762376A EP2891230A2 EP 2891230 A2 EP2891230 A2 EP 2891230A2 EP 13762376 A EP13762376 A EP 13762376A EP 2891230 A2 EP2891230 A2 EP 2891230A2
Authority
EP
European Patent Office
Prior art keywords
linear
slots
deforming
movement
stator
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Withdrawn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
EP13762376.5A
Other languages
German (de)
English (en)
Inventor
André Lucas MERINI
Anderson Wolf
Tarcisio João GROTT
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.)
Whirlpool SA
Original Assignee
Whirlpool SA
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 SA filed Critical Whirlpool SA
Publication of EP2891230A2 publication Critical patent/EP2891230A2/fr
Withdrawn legal-status Critical Current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
    • H02K15/02—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/22—Notching the peripheries of circular blanks, e.g. laminations for dynamo-electric machines

Definitions

  • the present invention refers to an optimized process for producing a stator of a dynamo-electric machine. More preferably, the present invention refers to a process for deforming slots that are provided in blades utilized for the production of a stator of an electric motor, wherein said process is carried out by radially moving a punch element, which is guided by the action of some wedges that are activated by the vertical movement of the hammer of a mechanical press.
  • the present invention refers to a system for deforming slots that take part in the manufacture of blades used for producing stators of dynamo-electric machines.
  • dynamo-electric machines are equipments destined to energy transformation, in special, they are capable of converting electrical energy into mechanical energy, for example, electric motors, or vice versa, converting mechanical energy into electrical energy, such as generators.
  • These equipments are normally formed by movable and fixed inductive cores, wherein its functioning is based on the electromagnetic induction generated due to the interaction between said inductive cores.
  • the fixed cores are arranged and accommodated in the stator body, and the movable cores are arranged in the rotor body, the interaction between said cores is capable of generating a magnetic field that is enough to set the rotor in motion and, consequently, obtain the transformation of electrical energy into mechanical energy.
  • stator of a dynamo-electric machine is fundamentally integrated by a metal frame and a plurality of coils (electrical conductors which are wound around a tooth), wherein said coils are arranged in an aligned way in relation to the metal frame.
  • the metal frame of a stator defines radial teeth that are circularly spaced one from the other, and circumferentially attached one to the other by their upper ends (wherein the lower ends are spaced one from the other). These teeth define, as a consequence, structures around which the electrical conductors are wound, and the gaps between said teeth have the function of accommodating the volume formed by the electrical conductors.
  • each tooth and its corresponding coil form a fixed inductive core.
  • the rotor (whose physical construction is similar to the physical construction of the stator) is assembled in the interior of the stator, and as a consequence, the teeth of the stator metal frame have a length that is sized so as to form a central gap, said gap being used to accommodate and locate the rotor.
  • Figure 1 illustrates a schematic and upper view of a stator blade of a dynamo- electric machine in accordance with a conventional construction of the prior art.
  • stator and the rotor of the same dynamo-electric machine can be obtained from the same metal plate, as rotor size is substantially equivalent to the central gap of the stator.
  • handling metal blocks includes complex industrial processes, which generate results of dubious quality.
  • stator metal frames of dynamo-electric machines of the prior art are normally produced by attaching multiple metal blades of equivalent sizes.
  • One example of this construction can be noted in document US 2011/0127876, wherein it is illustrated and described a single metal plate (raw material), which, when subjected to a stamping process, can be utilized for producing multiple blades of a stator and multiple blades of a rotor. It is also emphasized that the rotor blades are produced by utilizing spare parts of raw material, which are obtained after stamping the stator blades.
  • the area of the electrical conductors, which form the coils of the stator comprises a feature that is capable of influencing the efficiency of the dynamo-electric machine. More specifically, it is known that electrical conductors of smaller area are more subjected to the occurrence of joule effect, besides the intrinsic limitation related to the nominal value of the electric current that these conductors support. Therefore, there is the interest of developing electrical conductors, which form the coils of the stator, presenting the greatest possible area (respecting the requirements of each design).
  • the area of the electrical conductors which form the coils of the stator tends to be limited by the features of the stator metal frame.
  • each tooth of the stator blade has a final end defined by two side flaps. Therefore, the area of the electrical conductors, which compose the coils of the stator, is limited by the gap that exists between the side flaps of consecutive teeth, wherein the process of inserting the wire into the stator is limited by such gap between the side flaps.
  • said gap between the side flaps of consecutive teeth also comprises a feature capable of influencing the efficiency of the dynamo-electric machine. This is due to the fact that the greater is the spacing, the greater the magnetic dispersion of the inductive core and, consequently, the greater the losses of the dynamo-electric machine (in relation to the amount of electrical energy converted into mechanical energy, or vice versa).
  • stator blades of dynamo-electric machines whose side flaps of the teeth are susceptible of "motion" during the process for producing the cited stator. Examples of such blades and/or processes are described in documents BR 9702724, US 4176444, US 4267719, and US 6742238.
  • Document BR 9702724 describes an optimized construction of a stator blade of an electric motor.
  • the side flaps of the teeth are able to be adjusted during the process for producing the stator, enabling, therefore, the "opening” and “closure” of the accommodating channels of the electrical conductors. More particularly, it is noted that the "opening” and “closure” of such channels occurs by deforming the side flaps of the teeth.
  • the main negative aspect related to the construction described in document BR 9702724 refers to the need of deforming the side flaps of the teeth to not only close but also to open the channels, since it is verified that it is extremely complex to group together multiple blades whose side flaps of the teeth are pivoted.
  • the "opening" of the channels is carried out in an apparatus comprising a punch element wherein each channel is invaded by a punch element, and each lower end of the teeth is supported in a type of deforming die.
  • the movement (from inside to outside) of the punch element forces the side flaps of the teeth against the pattern and, as a consequence, the cited side flaps takes the shape of the pattern.
  • one of the objectives of the present invention is to present a process for deforming the slots of stator blades of dynamo-electric machines which promotes an appropriate opening for the accommodating channels of the electrical conductors.
  • the teeth side flaps of the blade slots are deformed during the proper stamping step. More particularly, by the oscillation of the mechanical press and subsequent to the step of stamping and removing the "waste" for the assembly of the rotor.
  • Another objective of the present invention is the provision of a system for deforming the blade slots of a stator, wherein said system is capable of promoting the appropriate and functional deformation of the accommodating channels of the stator electrical conductors. More particularly, the system of the present invention is capable of solving the above- mentioned flaws of the prior art references and, mainly, obtaining a stator blade that is appropriate for accommodating the electrical conductors in such a way that, during the assembly and production of the stator, this presents a construction that is easy to adjust for the safe closure of said channels.
  • this process comprises at least one "first” step of stamping the raw material to form at least one blade, and it is different from the prior art processes because it provides, subsequent to said "first” step, at least “another” step of deforming the side flaps of the teeth that are adjacent to the slots of the stator blade.
  • this "another" step fundamentally comprises the following sub-steps: at least one vertical forward movement of at least one extending wedge cooperated with a plurality of linear slides; at least one radial forward movement of punch elements cooperated with said linear slides; at least one vertical backward movement of at least one returning rod cooperated with a plurality of linear slides; and at least one radial backward movement of punch elements to their initial position. Additionally, it shall be detached that the radial forward movement of punch elements is capable of forcing the impact between each punch element and a corresponding tip of the tooth that is adjacent to the slots of the stator blade, achieving, therefore, the main objectives of the present invention.
  • the extending wedges and the returning rods effectuate a cooperative movement.
  • this movement can be independent.
  • the consequent movement of the linear slides causes a forced displacement of the returning rods, which are also moved by means of an independent backward mechanism.
  • the present invention further refers to a system of deforming slots in stator blades of a dynamo-electric machine, which was especially developed so as to carry out the above-detailed process.
  • the cited system of deforming comprises, in the same mechanical unit, at least one means of stamping the raw material and forming at least one blade and at least one means of deforming the side flaps of the teeth that are adjacent to the slots of at least one blade.
  • the cited mechanical unit comprises a stamping central which is composed by at least one cut stamping module and at least one deformation module considering the physical impact of the movable components.
  • the cited deformation module by physical collision of movable components is basically composed by: at least one set of extending wedges radially arranged; at least one set of returning rods radially arranged; and at least one set of linear slides cooperated with said set of extending wedges and returning rod.
  • Each linear slide further comprises at least one deforming punch element capable of deforming the side flaps of the teeth that are adjacent to the slots of at least one blade by physical impact deformation.
  • the set of extending wedges is capable of promoting the linear movement of the set of linear slides.
  • the set of the returning rods are also capable of promoting the linear movement of the linear slides.
  • the interactions between the linear slides and their corresponding extending wedges and returning rods are promoted by the wedge configuration of the corresponding contact ends of such components.
  • the returning rods are actuated by a returning mechanism which may comprise a spring-type or an electromechanical- type backward mechanism.
  • Figure 1 illustrates an example of a stator blade that is obtained during the stamping process of the raw material, in accordance with the present invention
  • Figure 2 illustrates an example of a stator blade that is obtained after the process of deforming the slot, in accordance with the present invention
  • FIGS 3, 4, and 5 illustrate, in a schematic way, a first option of the process and system, in accordance with the present invention
  • FIGS 6, 7, and 8 illustrate, in a schematic way, a second option of the process and system, in accordance with the present invention.
  • the blade of the stator 1 which is obtained during a stamping step, comprises a plurality of teeth 4 that are radially arranged, and each of them presents two side flaps 5 arranged in its internal ends 4.
  • These blades of the stator 1 when properly grouped one over the other, form the metal frame of the stator, defining accommodating channels 2 for electrical conductors.
  • Figure 2 illustrates the same blade of the stator 1 after the deforming process of the slots, in accordance with the present invention. More particularly, it is noted that said side flaps 5 are deformed so as to promote the opening of the accommodating channels 2 for the electrical conductors (not illustrated).
  • the main objective of the present invention is to obtain simultaneously, and in the same mechanical unit, the "phases" of a stator blade 1 , as illustrated in figures 1 and 2.
  • a process for deforming slots in stator blades of dynamo-electric machines which provides at least one step (A) of stamping the raw material so as to form at least one blade 1 , subsequently, at least one step (A1) of deforming the side flaps 5 of the teeth 4 that are adjacent to the slots of the stator blade 1.
  • said stator blade 1 is subjected to a process for deforming the slots that, subsequent to stamping the raw material and forming the blade as illustrated in Figure 1 , is subjected to a step (A1) which comprises the vertical movement of at least one set of extending wedges 7 radially arranged around said stator blade 1 and aligned with the corresponding slots that are formed by the side flaps 5 of the adjacent teeth 4.
  • step (A1) refers to the step which is responsible for promoting the deformation of the side flaps 5 of the teeth 4 that are adjacent to the slots of the stator blade 1 , and comprises the following sub-steps:
  • the cited extending wedge 7 interacts with a corresponding linear slide 8, each of them being composed by a deforming punch 9 to contact said slots of the stator blade 1.
  • the cited punch elements 9 are forced to collide with a corresponding slot of the stator blade 1. Such movement and impact causes the opening (a) for the accommodating channels 2 of the electrical conductors.
  • the vertical backward and forward movement of the set of extending wedges 7 occurs due to the vertical movement for activating the mechanical press of stamping the stator blades 1.
  • the interaction of the linear slide 8 with the returning rod 10 is obtained as a result of a wedge configuration of the corresponding contact ends.
  • This configuration ensures the horizontal and radial movement of the punch elements 9, in a safe and appropriate manner, to promote the deformation of the slots that are formed by the side flaps 5.
  • said returning rod 1 is moved by means of a backward movement F, which can be a spring, a electric-electronic mechanism or the proper structure of the mechanical press, wherein, in this case, said returning rod 10 is directly or indirectly connected to the upper base 3 of the mechanical press (or even to the upper base of the tool that is fixed to the mechanical press), so as to be activated in accordance with the oscillation of the cited mechanical press.
  • a backward movement F which can be a spring, a electric-electronic mechanism or the proper structure of the mechanical press, wherein, in this case, said returning rod 10 is directly or indirectly connected to the upper base 3 of the mechanical press (or even to the upper base of the tool that is fixed to the mechanical press), so as to be activated in accordance with the oscillation of the cited mechanical press.
  • the present invention further refers to a system for deforming slots in stator blades of dynamo-electric machines, wherein said system comprises at least one means of stamping the raw material and forming a stator blade 1 , such as illustrated in figure 2, and at least one set of extending wedges 7 radially arranged around said blade 1 and aligned with the corresponding slots, which are formed by the side flaps 5 of the adjacent teeth 4.
  • each extending wedge 7 comprises a profile to interface with a corresponding linear slide 8 which is composed by a deforming punch element 9 responsible for producing the opening (a) for the accommodating channel 2 of the electrical conductors.
  • the system comprises at least one set of returning rods 10 that conduct the cited linear slides 8 to the initial position.
  • the cited extending wedges 7 are moved as a result of the vertical movement for activating the mechanical press of stamping the blades 1.
  • the contact ends of the linear slide 8 which interacts with the returning rod 10 and the extending wedge 7 are configured in the form of a wedge; thus, upon moving the extending wedge 7 or the returning rod 10, the linear slide 8 moves to promote the openings (a) for the accommodating channels of the electrical conductors.
  • a backward mechanism F which can be a spring, a electric- electronic mechanism or the proper structure of the mechanical press, wherein, in this case, said returning rod 10 is connected to the upper base 3 of the mechanical press (or even to the upper base of the tool that is fixed to the mechanical press), so as to be activated in accordance with the oscillation of the cited mechanical press.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

La présente invention concerne un processus et un système qui permettent de déformer les fentes des aubes de stator de machines dynamo-électriques et qui sont apte à créer une ouverture appropriée pour les canaux de logement (2) des conducteurs électriques. Plus particulièrement, la présente invention concerne un processus et un système constitués d'un ensemble de coins qui se prolongent (7), qui sont répartis radialement autour de ladite aube (1) et alignés sur les fentes correspondantes, formées par les rabats latéraux (5) des dents adjacentes (4), l'extrémité de chaque coin qui se prolonge (7) présentant un profil pour servir de jonction avec un coulisseau linéaire correspondant (8), chacun d'eux étant muni d'un élément perforateur et déformateur (9) qui entraîne l'ouverture des canaux de logement (2) des conducteurs électriques ; d'au moins un ensemble de tiges de renvoi (10) pour renvoyer lesdits coulisseaux linéaires (8) à leur position initiale.
EP13762376.5A 2012-08-31 2013-08-28 Methode et système de déformation des points de dents et des encoches d'un stator d'une machine dynamo-électrique Withdrawn EP2891230A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR102012022075A BR102012022075A2 (pt) 2012-08-31 2012-08-31 Processo e sistema de deformação de ranhuras de estator de máquina dínamo elétrica
PCT/BR2013/000331 WO2014032148A2 (fr) 2012-08-31 2013-08-28 Processus et système de déformation des fentes de stator d'une machine dynamo-électrique

Publications (1)

Publication Number Publication Date
EP2891230A2 true EP2891230A2 (fr) 2015-07-08

Family

ID=50184496

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13762376.5A Withdrawn EP2891230A2 (fr) 2012-08-31 2013-08-28 Methode et système de déformation des points de dents et des encoches d'un stator d'une machine dynamo-électrique

Country Status (5)

Country Link
EP (1) EP2891230A2 (fr)
CN (1) CN104756376A (fr)
BR (1) BR102012022075A2 (fr)
MX (1) MX2015002744A (fr)
WO (1) WO2014032148A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105436288B (zh) * 2015-12-16 2018-05-15 嵊州市利达电器厂 一种用于电机冲片生产的冲压装置
CN114505401B (zh) * 2022-04-19 2022-06-28 南通森玛特电机有限公司 一种三相电机加工用具有等距标记功能的定子槽冲槽设备

Family Cites Families (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
EP0871282A1 (fr) * 1997-04-11 1998-10-14 Kabushiki Kaisha Toshiba Stator pour machines électrodynamiques et méthode pour réaliser celui-ci
JP2003224941A (ja) * 2002-01-29 2003-08-08 Asmo Co Ltd 回転電機のステータ
JP2010239721A (ja) * 2009-03-31 2010-10-21 Hitachi Automotive Systems Ltd 回転電機

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014032148A3 *

Also Published As

Publication number Publication date
CN104756376A (zh) 2015-07-01
WO2014032148A2 (fr) 2014-03-06
BR102012022075A2 (pt) 2014-06-10
WO2014032148A3 (fr) 2015-01-08
MX2015002744A (es) 2015-09-23

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