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WO1992003870A1 - Electromoteur a stator stratifie et procede de fabrication de celui-ci - Google Patents

Electromoteur a stator stratifie et procede de fabrication de celui-ci Download PDF

Info

Publication number
WO1992003870A1
WO1992003870A1 PCT/DK1991/000230 DK9100230W WO9203870A1 WO 1992003870 A1 WO1992003870 A1 WO 1992003870A1 DK 9100230 W DK9100230 W DK 9100230W WO 9203870 A1 WO9203870 A1 WO 9203870A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
stator ring
pole
pole pieces
pole piece
Prior art date
Application number
PCT/DK1991/000230
Other languages
English (en)
Inventor
Aage Juul Larsen
Original Assignee
Thrige-Titan Electric A/S
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 Thrige-Titan Electric A/S filed Critical Thrige-Titan Electric A/S
Publication of WO1992003870A1 publication Critical patent/WO1992003870A1/fr

Links

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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • 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
    • H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/021—Magnetic cores
    • H02K15/022—Magnetic cores with salient poles

Definitions

  • the present invention relates to electromotors in general, and more particularly to an electromotor with a laminated stator in which a stator ring has inwardly protruding pole pieces.
  • the pole pieces have a substantially T-shaped cross section with a shaft or foot portion projecting from the stator ring and a head portion projecting from both sides of the shaft portion and having its surface facing the rotor curved to form a cylindrical surface having a radius slightly greater than the outer radius of the rotor with which it cooperates, and being slightly spaced therefrom.
  • Relevant stator coils are mounted on the shaft portions of the pole pieces in such a manner that they fill the space behind the rear sides of the projecting parts of the head portion.
  • stator coils will be mounted by being heeled over the broader head portions of the pole pieces and then narrowed about the shaft portions.
  • the single lamination for the pole pieces should be formed in connection with the stamping out of each single stator lamination, by cutting off the inwardly projecting pole portions from the ring area along their base connection with the inner side of the stator ring, i.e. along or rather across the roots of their shaft portions.
  • this technique it is difficult to achieve an accurate and non-problematic mounting of the assembled, rod-like pole pieces on the interior side of the likewise assembled stator ring. It has been proposed to fasten the pole pieces by means of bolts introduced from the outside thereof.
  • fastening of the above-described nature would also require the provision of radial passages through the stator ring or cylinder, which is undesired as this would facilitate penetration of moisture into the rotor area.
  • Such lo ⁇ r-ing means can be formed by locking rods inserted through axially extending holes or opposed half holes formed in the adjacent side faces.
  • I t is an object of the present invention to provide an improved electric motor.
  • the present invention provides for a solution which allows separate pole pieces to be prepared by a pure follow die operation on the lamination members which are stamped out for forming the stator ring and preferably also the body of the rotor, and which also enables an easy and effective fastening of the pole pieces to the stator ring.
  • the different pole parts of each single lamination member are shaped in three different manners; partly (for more than one pole piece part) by a clean cutting at the root, i.e.
  • the pole portions are also provided with holes located near the sides of their shaft portions, such that the stamped off pole piece parts can be assembled together to form the laminated pole pieces.
  • the laminated pole pieces are held together by means of anchoring rods inserted through said holes; the anchoring is effected by axially pressing together tl pole piece parts in the pack and carrying out a welding along the side areas of the pack, to which the anchoring rods extend in close proximity.
  • the pole piece parts are packed in series or blocks such that between relatively long blocks of evenly cut off pole piece parts there are interposed shorter blocks of the pole parts which were stamped out with the ear-shaped portions. These ear-shared portions in the assembled condition of the stator pole piece are spaced-apart projecting block portions on the root surface of the pole piece.
  • stator laminations are likewise assembled into block sections, which will not be different from each other since all stator laminations are similar to each other.
  • adjacent block sections are angularly turned relative to each other about the stator axis in such manner that along each mounting area of a pole piece alternating block sections will be positioned, of which some sections will respectively have non-recessed inner side portions and others will have inner side portions provided with larger and smaller recesses.
  • these recesses will form marked depressions in the inside of the ring, and the arrangement may be such that 5 these depressions be located in accordance with the protruding ear-shaped block portions on the pole pieces so as to receive these block portions upon the insertion of the pole pieces at the respective mounting areas of the inner side of the stator ring.
  • the ear-shaped portions are provided with holes, which in the assembled condition of the pole piece laminations will provide axial passages to receive a holding rod therethrough.
  • the ear-shaped block portions are spaced from each other and when the pole pieces
  • stator ring 15 are introduced into the assembled stator ring it is possible to secure the inserted pole pieces in the stator ring merely by introducing with more or less pressure a holding rod axially through the alternating hole passages extending through the ear-shaped block portions of the pole pieces and
  • pole pieces with premounted stator coils introduced over the narrow root ends thereof, will be connected to the inner side of the stator ring in a very
  • the connection will be easy to release merely by pulling out the axial holding rod, and it will be easy to repair a given motor by interchanging a burnt stator coil. It is to be noted that it has been already known in the relevant field to effect a modular turning of the stamped out laminations, namely for achieving compensation for thickness variations of the laminations, i.e. the machine equipment required for such turning already exists, and in connection with the invention it should only be ensured that the turning is effected in blocks or packs, without any turning between the single lamination members in the same block.
  • the invention is directed to a motor, preferably a
  • DC motor which is made up in accordance with the new pr i nciples here disclosed.
  • pole pieces be provided separately, as solid bodies, the projecting ear-shaped blocks of which may be mounted and secured in the depressions provided in the inner side of the laminated motor ring.
  • Fig. 1 is a plan view of a stator and rotor lamination member for use in a motor according to the present invention
  • Fig. 2 is a plan view of a stamped out stator lamination for forming a stator pack
  • Fig. 3 is a perspective view of stator lamination blocks which are to be assembled to form the stator of the motor;
  • Fig. 4 is a perspective view with a portion cut away, illustrating the assembled stator
  • Fig. 5 is a perspective view of a row of pole blocks for forming a pole piece of the motor
  • Fig. 6 is a perspective view of the assembled pole piece
  • Fig. 7 is a plan view of the assembled stator.
  • stator and a rotor of the motor use is made of lamination members as shown in Fig. 1.
  • the stamping lines are shown by drawn lines.
  • the main parts of the motor are an outer, closed stator ring 2, pole pieces 4 inwardly projecting from the inner surfaces of the stator ring and a central rotor part 6 having slot openings at an outer periphery thereof for receiving rotor coils.
  • the stator ring 2 has inwardly protruding, so- called turning poles 8, which are, however, not part of the present invention and therefore will not be described further.
  • the rotor lamination part 6 as well as the interconnecting lamination portions between the stator and the rotor parts are stamped out, and respective holes 10 are stamped out in the stator ring 2 in the proximity to the pole pieces 4 marked A and B.
  • the pole pieces A and B are stamped out along the marked dash-and-dot-lines a, which extend in continuation of the inner contour of the stator ring 2.
  • the same applies to the pole piece designated at D, while the pole piece designated at C is stamped out along a line which generally follows the inner contour of the stator ring but has a local bulging-out portion 12 at the middle of a root portion of the pole piece C.
  • a depressic 14 will be produced at the inner side of the stator ring 2, along with an outwardly projecting ear-shaped portion 16 formed on the pole piece C.
  • a hole 18 is stamped out in the ear portion
  • a depression 20 is stamped out from the , inner edge of the stator ring 2.
  • the shape of depression 20 corresponds to that of the ear-shaped portion 16 of the pole piece C, though being slightly larger than that portion.
  • the reference numeral 20 will be used to identify the depression produced by , the stamping operation here rmsidered.
  • the finished stator lamination is shown in Fig. 2.
  • the laminations are fully symmetrical and are assembled together into a stator pack while being turned by one pole pitch for each new lamination, but here the laminations are not fully symmetrical. They are assembled together without being mutually turned, into small packs 22, as shown in Fig. 3. The small packs 22 in turn, are turned by one pole pitch when they are consecutively assembled together to form a complete stator ring pack or block.
  • the purpose of turning the laminations was to compensate for obliquities which could occur as a result of certain non-uniformities or variations in the plate thickness across the plate or lamination members.
  • each of the inner side portions the double depressions 24, 26 will be located with an even spacing, namely with a spacing corresponding to the width of two lamination packs or sub-assemblies 22 or to the double length of the depression in each pack, of which each single depression 24, 26 constitutes one half.
  • the stamped out pole piece laminations are correspondingly assembled together so as to form pole blocks or sub-assemblies 28, 30 as shown in Fig. 5.
  • the blocks 28 consist of the respective pole piece laminations A, B and D while the blocks 30 consist of the pole piece laminations C respectively, whereby each block 30 has a protruding profile portion or protrusion 32 formed by the ear-shaped portions
  • the mounting of the pole block 34 into an accurate position in the stator ring may be effected by such a loose insertion of the protrusions 32, whereafter the pole block is forced to slide in the axial direction to cause a lateral engagement between the protrusions 32 and the walls of the d epressions 26; then the final mounting can be effected as described below.
  • pole piece blocks 28 and 30 can be held together by means of welding wires 40 shown in Fig. 5, which wires are inserted into through passages 36 formed by holes 36' (Fig. 1) in the shaft portions of the pole piece laminations, whereafter the entire pole piece block 34 is pressed together axially and welded at weld seams 42 (shown in Fig. 6) , laid along the respective lateral portions, such that the laminations will be secured to the welding wires 40 and to each other in a conventional manner known per se.
  • stator ring body 25 A similar technique may be used for the stator ring body 25, using, for example, stamped out passages 44 (Fig. 7) provided at the corners of the stator laminations which are here of square shape as shown.
  • stay bolts 46 cooperating with suitable spanner means at the opposite ends of the stator ring can be provided, for example, along the outer corners of the stator ring body.
  • stator coils 48 (Fig. 7) are placed onto the shaft portions of the pole pieces, and thereafter the thus- assembled pole pieces are attached to the inner side of the stator ring as described above.
  • pole piece blocks 34 are fastened to the stator ring body by introducing anchoring rods 50, one for each pole piece (Fig. 7), through the passages in the stator ring formed by the holes 10 in the stator laminations 2.
  • Each lamination is provided with only two such holes, but the recesses 14 and 20 make it possible to insert rods 50 which pass through the holes 10 in those lamination packs 22 which have holes 10 located in alignment with these recesses.
  • the anchoring rods 50 will pass freely through recesses 14, 24, while in recesses 20, 26 they will pass through holes 18 formed in protrusions 32 which are inserted into these recesses. Thereby the pole piece blocks 34 will be anchored to the stator ring at each of the protrusions 32.
  • holes 18 are positioned slightly closer to the base surface of the lamination packs 30 than holes 10 relative to the inner side of the stator ring 25. If the anchoring rods 50 used for insertion into the passages formed by the holes 10 are pointed at their leading end, then it is possible to achieve a desirable, very strong tightening of the pole pieces against the stator ring. However, it will still be practicable to effect the removal of the anchoring rods 50 from the stator ring 25, such that one or more pole pieces may later be dismounted for exchange of the associated stator coils 48, should such a repair become necessary. Thus, a rigid and yet a reasonably easily releasable fastening of the pole pieces is achieved by the simple measure of introducing anchoring rods 50 into the holes 10.
  • Depressions 26 will be almost totally filled by protrusions 32, while depressions 24 will remain open between the inner side of the stator ring and the base portions of the adjacent pole lamination packs 28. This results in an undesired air space in the magnetically conductive system, but it has been found that this disadvantage is of such minor significance that it is entirely overshadowed by the advantages connected with the present invention.
  • pole piece lamination C may protrude a lesser amount. Also the shape of the base of the pole lamination shall be taken into account at the pole laminations D and C.
  • the principle of the invention may, optionally in certain cases, be utilized even for the manufacturing of laminated rotors with coils.

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

Abstract

On décrit un moteur dont les pièces polaires (34) peuvent être fixées avec les bobines (48) du stator sur l'anneau du stator à l'aide d'ergots (32) locaux sur les pièces polaires insérées dans des dépressions locales (26) pratiquées dans la paroi interne de la bague du stator. Les pièces polaires peuvent être par la suite ancrées dans l'anneau du stator à l'aide d'une barre d'ancrage (50) qui est insérée axialement à travers des passages alignés dans l'anneau du stator et dans les ergots, respectivement. Les ergots (32) et les dépressions (26) sont formés grâce au découpage à la presse des lamelles du stator, celles-ci étant conçues de telle sorte que lesdites formes sont le résultat de l'empilement sélectif de paquets de lamelles (22; 28, 30), ceux-ci, en ce qui concerne l'anneau du stator, étant placés les uns sur les autres par rotation mutuelle et successive des blocs (22).
PCT/DK1991/000230 1990-08-15 1991-08-15 Electromoteur a stator stratifie et procede de fabrication de celui-ci WO1992003870A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK1935/90 1990-08-15
DK193590A DK193590D0 (da) 1990-08-15 1990-08-15 Elektromotor med lamelleret stator, og fremgangsmaade til fremstilling af en saadan stator

Publications (1)

Publication Number Publication Date
WO1992003870A1 true WO1992003870A1 (fr) 1992-03-05

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ID=8109034

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1991/000230 WO1992003870A1 (fr) 1990-08-15 1991-08-15 Electromoteur a stator stratifie et procede de fabrication de celui-ci

Country Status (3)

Country Link
EP (1) EP0502135A1 (fr)
DK (1) DK193590D0 (fr)
WO (1) WO1992003870A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999029026A1 (fr) * 1997-11-27 1999-06-10 Abb Ab Procede relatif a des machines electriques tournantes
US6867674B1 (en) 1997-11-28 2005-03-15 Asea Brown Boveri Ab Transformer
US6873080B1 (en) 1997-09-30 2005-03-29 Abb Ab Synchronous compensator plant
US6891303B2 (en) 1996-05-29 2005-05-10 Abb Ab High voltage AC machine winding with grounded neutral circuit
US6894416B1 (en) 1996-05-29 2005-05-17 Abb Ab Hydro-generator plant
US6970063B1 (en) 1997-02-03 2005-11-29 Abb Ab Power transformer/inductor
US6972505B1 (en) 1996-05-29 2005-12-06 Abb Rotating electrical machine having high-voltage stator winding and elongated support devices supporting the winding and method for manufacturing the same
US6995646B1 (en) 1997-02-03 2006-02-07 Abb Ab Transformer with voltage regulating means
US7019429B1 (en) 1997-11-27 2006-03-28 Asea Brown Boveri Ab Method of applying a tube member in a stator slot in a rotating electrical machine
US7046492B2 (en) 1997-02-03 2006-05-16 Abb Ab Power transformer/inductor
US7045704B2 (en) 2000-04-28 2006-05-16 Abb Ab Stationary induction machine and a cable therefor
US7061133B1 (en) 1997-11-28 2006-06-13 Abb Ab Wind power plant
US7141908B2 (en) 2000-03-01 2006-11-28 Abb Ab Rotating electrical machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE207853C (fr) *
US928037A (en) * 1904-07-25 1909-07-13 Gen Electric Dynamo-electric machine.
US1608314A (en) * 1922-10-02 1926-11-23 Electric Machinery Mfg Co Field pole and rotor construction
FR1507115A (fr) * 1966-01-08 1967-12-22 Licentia Gmbh Pôles constitués par des tôles empilées pour former une roue polaire pour générateurs synchrones à pôles intérieurs
FR1550017A (fr) * 1967-01-21 1968-12-13
GB1587785A (en) * 1978-04-06 1981-04-08 Wing Fat Ma Design of core laminations for large electrical rotating machines

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE207853C (fr) *
US928037A (en) * 1904-07-25 1909-07-13 Gen Electric Dynamo-electric machine.
US1608314A (en) * 1922-10-02 1926-11-23 Electric Machinery Mfg Co Field pole and rotor construction
FR1507115A (fr) * 1966-01-08 1967-12-22 Licentia Gmbh Pôles constitués par des tôles empilées pour former une roue polaire pour générateurs synchrones à pôles intérieurs
FR1550017A (fr) * 1967-01-21 1968-12-13
GB1587785A (en) * 1978-04-06 1981-04-08 Wing Fat Ma Design of core laminations for large electrical rotating machines

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6919664B2 (en) 1996-05-29 2005-07-19 Abb Ab High voltage plants with electric motors
US6972505B1 (en) 1996-05-29 2005-12-06 Abb Rotating electrical machine having high-voltage stator winding and elongated support devices supporting the winding and method for manufacturing the same
US6936947B1 (en) 1996-05-29 2005-08-30 Abb Ab Turbo generator plant with a high voltage electric generator
US6891303B2 (en) 1996-05-29 2005-05-10 Abb Ab High voltage AC machine winding with grounded neutral circuit
US6894416B1 (en) 1996-05-29 2005-05-17 Abb Ab Hydro-generator plant
US6906447B2 (en) 1996-05-29 2005-06-14 Abb Ab Rotating asynchronous converter and a generator device
US6970063B1 (en) 1997-02-03 2005-11-29 Abb Ab Power transformer/inductor
US6995646B1 (en) 1997-02-03 2006-02-07 Abb Ab Transformer with voltage regulating means
US7046492B2 (en) 1997-02-03 2006-05-16 Abb Ab Power transformer/inductor
US6873080B1 (en) 1997-09-30 2005-03-29 Abb Ab Synchronous compensator plant
WO1999029026A1 (fr) * 1997-11-27 1999-06-10 Abb Ab Procede relatif a des machines electriques tournantes
US7019429B1 (en) 1997-11-27 2006-03-28 Asea Brown Boveri Ab Method of applying a tube member in a stator slot in a rotating electrical machine
US6867674B1 (en) 1997-11-28 2005-03-15 Asea Brown Boveri Ab Transformer
US7061133B1 (en) 1997-11-28 2006-06-13 Abb Ab Wind power plant
US7141908B2 (en) 2000-03-01 2006-11-28 Abb Ab Rotating electrical machine
US7045704B2 (en) 2000-04-28 2006-05-16 Abb Ab Stationary induction machine and a cable therefor

Also Published As

Publication number Publication date
DK193590D0 (da) 1990-08-15
EP0502135A1 (fr) 1992-09-09

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