EP0625290A1 - Set of stator laminations for uncased three-phase motors - Google Patents

Set of stator laminations for uncased three-phase motors

Info

Publication number
EP0625290A1
EP0625290A1 EP93907762A EP93907762A EP0625290A1 EP 0625290 A1 EP0625290 A1 EP 0625290A1 EP 93907762 A EP93907762 A EP 93907762A EP 93907762 A EP93907762 A EP 93907762A EP 0625290 A1 EP0625290 A1 EP 0625290A1
Authority
EP
European Patent Office
Prior art keywords
cooling
cooling air
stator core
stator
ribs
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.)
Ceased
Application number
EP93907762A
Other languages
German (de)
French (fr)
Inventor
Heinz-Dieter Eberhardt
Eberhard Schubert
Ralph Hahnel
Norbert Thomas
Joachim Pax
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.)
VEM-Elektroantriebe GmbH
Original Assignee
VEM-Elektroantriebe 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 VEM-Elektroantriebe GmbH filed Critical VEM-Elektroantriebe GmbH
Publication of EP0625290A1 publication Critical patent/EP0625290A1/en
Ceased legal-status Critical Current

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
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium

Definitions

  • the invention relates to a square stator core package without housing three-phase machines with axial cooling channels.
  • fins are welded onto the stator core or already provided when the individual plates are punched, and the intermediate fin channels are ventilated.
  • the predominantly square sheets are provided with individual cooling channels in the corner areas.
  • the cooling air is sucked or pressed in the cooling channels.
  • closed axial cooling channels are known both for electrical machines with a housing in accordance with DE-OS 26 23 493 and for housingless three-phase machines in accordance with DE-OS 37 35 735.
  • Individual stator plates with large cooling air openings are described, which encompass the entire electromagnetic part.
  • instead of the large cooling air Openings arranged radial cooling air recesses so that a larger surface is available for the supply of heat.
  • This solution has the disadvantage that the side length of the square stator core is much larger than the necessary diameter for the magnetic circuit.
  • the object of the invention is to further improve the cooling of caseless three-phase machines, to use the cooling air flow effectively and to make the cross section of the stator core package as small as possible.
  • the object is achieved in that, in the case of three-phase motors without a square cross section, the stator core has axial cooling channels in the corner areas, their position and dimensions being predetermined by the openings arranged in the press frame and longitudinal and transverse cooling webs () in the cooling air windows (1). 2, 3) are arranged and the cooling air openings (4) formed thereby, with the exception of the production opening (6) in the outermost corner region, are continuously provided with ribs (5) on the inside on at least three sides.
  • REPLACEMENT LEAF The arrangement of many longitudinal cooling webs (2) and transverse cooling webs (3) in the cooling air window (1) creates a large number of cooling air openings (4).
  • the cooling surface of the stator plate package that is effectively available for transferring heat to the cooling air is greatly increased.
  • the production opening can also be provided in whole or in part with ribs (5).
  • the position of the cooling air openings is generally apparent from the prior art within the boundary formed by the opening of the press frame.
  • a further enlargement of the flow cross section for cooling is possible according to claim 3, in that the cross section of the cooling air window (1) of the stator core stack formed by the outer edge is equal to or larger than the cross section of the opening of the press frame (7).
  • the figure shows the symmetrical half of a stator core according to the invention of a three-phase main drive.
  • a cooling air window (1) the outer edge of which
  • Opening of the press frame (7) is formed, several longitudinal and transverse cooling webs (2, 3) are arranged.
  • the resulting cooling air openings (4) are continuously provided with ribs (5) on the inside on at least three sides.
  • the width of the longitudinal cooling webs (2) and transverse cooling webs (3) is chosen so that the heat conduction from the adjacent areas "of the magnetic circuit remains large enough so that the cooling air absorbs maximum heat.
  • the number, the position and the dimensioning of the longitudinal and transverse cooling webs (2, 3) and the individual ribs (5) result on the one hand from the requirement to create favorable heat transfer conditions and on the other hand from technological conditions in relation to the cost-effective Production of the individual stand sheets.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

Le refroidissement de moteurs triphasés sans boîtier comportant un ensemble de tôles statoriques s'effectue au moyen de canaux de refroidissement axiaux. Le processus de refroidissement doit être amélioré, le courant d'air de refroidissement étant utilisé de manière aussi rentable que possible et la section transversale de l'ensemble de tôles statoriques étant aussi réduite que possible. A cet effet, des ailettes de refroidissement longitudinales et transversales (2, 3) sont aménagées dans l'ensemble de tôles statoriques dans la zone d'une fenêtre d'air de refroidissement (1) et les orifices d'air de refroidissement (4) ainsi formées comportent intérieurement, en dehors de l'ouverture imposée par la technique de production et située dans le coin le plus extérieur, des nervures (5) sur trois côtés au moins. Cet ensemble de tôles statoriques convient particulièrement bien aux moteurs d'entraînement principaux triphasés.Housingless three-phase motors with a set of stator laminations are cooled by means of axial cooling channels. The cooling process should be improved, the cooling air stream being used as cost effectively as possible and the cross section of the stator lamination assembly being as small as possible. For this purpose, longitudinal and transverse cooling fins (2, 3) are provided in the stator lamination assembly in the area of a cooling air window (1) and the cooling air openings (4 ) thus formed comprise internally, apart from the opening imposed by the production technique and located in the outermost corner, ribs (5) on at least three sides. This set of stator laminations is particularly suitable for three-phase main drive motors.

Description

nderblechpaket gehäuseloser Drehstroπ-maschinen sheet metal package of housing-less rotary machines
Die Erfindung betrifft ein guadratisches Ständerblechpaket gehäuseloser Drehstrommaschinen mit axialen Kühlkanälen.The invention relates to a square stator core package without housing three-phase machines with axial cooling channels.
Die Kühlung gehäuseloser Drehstrommaschinen erfolgt im wesentlichen durch drei Prinzipien:The cooling of three-phase machines without housings is essentially based on three principles:
1. Zur Vergrößerung der Kühlfläche werden auf das Ständer¬ blechpaket Rippen aufgeschweißt bzw. bereits beim Stanzen der einzelnen Bleche vorgesehen, und die Zwischenrippen- kanäle werden belüftet.1. In order to enlarge the cooling surface, fins are welded onto the stator core or already provided when the individual plates are punched, and the intermediate fin channels are ventilated.
2. Bleche bzw. Teilblechpakete werden versetzt geschichtet. Die entstandenen Kühlkanäle werden durch einen Kühlluft¬ strom entsprechend DE-PS 30 26 892 umspült.2. Sheets or partial sheet packs are layered offset. The resulting cooling channels are washed around by a cooling air flow in accordance with DE-PS 30 26 892.
3. Die vorwiegend guadratischen Bleche werden mit einzelnen Kühlkanälen in den Eckbereichen versehen. Durch diese3. The predominantly square sheets are provided with individual cooling channels in the corner areas. Through this
Kühlkanäle wird die Kühlluft gesaugt bzw. gedrückt.The cooling air is sucked or pressed in the cooling channels.
Die Anwendung von geschlossenen axialen Kühlkanälen ist so¬ wohl für elektrische Maschinen mit Gehäuse entsprechend DE-OS 26 23 493 als auch für gehäuselose Drehstrommaschinen nach DE-OS 37 35 735 bekannt. Dabei werden einzelne Ständer¬ bleche mit großen Kühlluftöffnungen beschrieben, die den ge¬ samten elektromagnetischen Teil umfassen. In einer speziel¬ len Ausführungsvariante sind anstelle der großen Kühlluft- Öffnungen radiale Kühlluftaussparungen angeordnet, damit eine größere Oberfläche zur Wärmezufuhr zur Verfügung steht. Dieser Lösung haftet der Nachteil an, daß die Seitenlänge des guadratischen Ständerblechpaketes wesentlich größer als der notwendige Durchmeser für den magnetischen Kreis ist.The use of closed axial cooling channels is known both for electrical machines with a housing in accordance with DE-OS 26 23 493 and for housingless three-phase machines in accordance with DE-OS 37 35 735. Individual stator plates with large cooling air openings are described, which encompass the entire electromagnetic part. In a special embodiment variant, instead of the large cooling air Openings arranged radial cooling air recesses so that a larger surface is available for the supply of heat. This solution has the disadvantage that the side length of the square stator core is much larger than the necessary diameter for the magnetic circuit.
In der DE-OS 33 39 094 sind kreisförmige axiale Kühlkanäle beschrieben, die in einer vorteilhaften Ausführungsform sternförmig ausgebildet sind. Dieser Lösung haftet der Nachteil an, daß die Kühlkanäle einen, hohen Strömungswiderstand besitzen.In DE-OS 33 39 094 circular axial cooling channels are described, which are star-shaped in an advantageous embodiment. This solution has the disadvantage that the cooling channels have a high flow resistance.
Der Erfindung liegt die Aufgabe zugrunde, die Kühlung gehäuseloser Drehstrommaschinen weiter zu verbessern, da¬ bei den Kühlluftstrom effektiv zu nutzen und den Quer- schnitt des Ständerblechpaketes so klein wie möglich zu gestalten.The object of the invention is to further improve the cooling of caseless three-phase machines, to use the cooling air flow effectively and to make the cross section of the stator core package as small as possible.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß bei gehäuselosen Drehstrommotoren mit guadratischem Querschnitt das Ständerblechpaket in den Eckbereichen axiale Kühlkanäle besitzt, wobei deren Lage und Abmessung durch die im Pre߬ rahmen angeordneten Öffnungen vorgegeben sind und in den Kühlluftfenstern (1) Längs- und Querkühlstege (2, 3) ange¬ ordnet sind und die dadurch gebildeten Kühlluftöffnungen (4), bis auf die Fertigungsöffnung (6) im äußersten Eckbereich, durchgehend innen an mindestens drei Seiten mit Rippen (5) versehen sind.According to the invention, the object is achieved in that, in the case of three-phase motors without a square cross section, the stator core has axial cooling channels in the corner areas, their position and dimensions being predetermined by the openings arranged in the press frame and longitudinal and transverse cooling webs () in the cooling air windows (1). 2, 3) are arranged and the cooling air openings (4) formed thereby, with the exception of the production opening (6) in the outermost corner region, are continuously provided with ribs (5) on the inside on at least three sides.
ERSATZBLATT Durch die Anordnung vieler Längskühlstege (2) und Querkühl¬ stege (3) im Kühlluftfenster (1) entstehen eine Vielzahl von Kühlluftöffnungen (4). Im Zusammenhang mit den erfindungsge¬ mäßen Rippen (5) wird die effektiv zur Wärmeübergabe an die Kühlluft zur Verfügung stehende Kühlfläche des Ständerblech¬ paketes stark vergrößert.REPLACEMENT LEAF The arrangement of many longitudinal cooling webs (2) and transverse cooling webs (3) in the cooling air window (1) creates a large number of cooling air openings (4). In connection with the ribs (5) according to the invention, the cooling surface of the stator plate package that is effectively available for transferring heat to the cooling air is greatly increased.
Durch Abstimmung des Kühlluftstromes auf die Kühlfläche, z. B. durch geeignete Ventilatoren und die erfindungsgemäßen Anordnungen der Längs- und Querkühlstege (2, 3) mit den Rip- pen (5), ist eine Minimierung der Seitenlänge des guadratischen Ständerblechpaketes bis auf den unbedingt zur elektromagne¬ tischen Dimensionierung notwendigen Durchmesser des magne¬ tischen Kreises möglich.By coordinating the cooling air flow on the cooling surface, for. B. by suitable fans and the inventive arrangements of the longitudinal and transverse cooling webs (2, 3) with the ribs (5), is a minimization of the side length of the square stator core up to the diameter of the magnet necessary for electromagnetic dimensioning table circle possible.
In der Regel sind in der Fertigungsöffnung (6) keine Rippen (5) angeordnet, da in diese technologisch bedingt Werkzeuge ein¬ greifen. Bei entsprechender konstruktiver Gestaltung dieser Werk zeuge kann auch die Fertigungsöffnung ganz oder teilweise mit Rippen (5) versehen sein.As a rule, no ribs (5) are arranged in the production opening (6), since for technical reasons tools engage them. With a corresponding structural design of these tools, the production opening can also be provided in whole or in part with ribs (5).
Allgemein aus dem Stand der Technik ersichtlich ist die Lage der Kühlluftöffnungen stets innerhalb der Berandung, die durch die Öffnung des Preßrahmens gebildet wird.The position of the cooling air openings is generally apparent from the prior art within the boundary formed by the opening of the press frame.
Eine weitere Vergrößerung des Strömungsquerschnittes zur Küh¬ lung ist gemäß Anspruch 3 möglich, indem der durch die äußere Berandung gebildete Querschnitt des Kühlluftfensters (1) des Ständerblechpaketes gleich oder größer als der Querschnitt der Öffnung des Preßrahmens (7) ist.A further enlargement of the flow cross section for cooling is possible according to claim 3, in that the cross section of the cooling air window (1) of the stator core stack formed by the outer edge is equal to or larger than the cross section of the opening of the press frame (7).
ERSATZBLATT Die Erfindung soll nachstehend anhand der Figur 1 in einem Ausführungsbeispiel näher beschrieben werden.REPLACEMENT LEAF The invention will be described in more detail below with reference to FIG. 1 in one embodiment.
Die Figur zeigt die symmetrische Hälfte eines erfindungsge¬ mäßen Ständerblechpaketes eines Drehstromhauptantriebes. In einem Kühlluftfenster (1), dessen äußere Berandung durch dieThe figure shows the symmetrical half of a stator core according to the invention of a three-phase main drive. In a cooling air window (1), the outer edge of which
Öffnung des Preßrahmens (7) gebildet wird, sind mehrere Längs¬ und Querkühlstege (2, 3) angeordnet. Die dabei entstehenden Kühlluftöffnungen (4) sind dabei durchgehend innen an mindestens drei Seiten mit Rippen (5) versehen. Die Breite der Längskühlstege (2) und Querkühlstege (3) wird dabei so gewählt, daß die Wärmeleitung aus den angrenzenden Bereichen" des magnetischen Kreises entsprechend groß bleibt, damit die Kühlluft maximal Wärme aufnimmt.Opening of the press frame (7) is formed, several longitudinal and transverse cooling webs (2, 3) are arranged. The resulting cooling air openings (4) are continuously provided with ribs (5) on the inside on at least three sides. The width of the longitudinal cooling webs (2) and transverse cooling webs (3) is chosen so that the heat conduction from the adjacent areas "of the magnetic circuit remains large enough so that the cooling air absorbs maximum heat.
Die Anzahl, die Lage und die Dimensionierung der Längs- und Querkühlstege (2, 3) sowie der einzelen Rippen (5) ergibt sich zum einen aus der Forderung, günstige Wärmeübergangs- Verhältnisse zu schaffen und zum anderen aus technologischen Bedingungen in bezug auf die kostengünstige Herstellung der einzelnen Ständerbleche.The number, the position and the dimensioning of the longitudinal and transverse cooling webs (2, 3) and the individual ribs (5) result on the one hand from the requirement to create favorable heat transfer conditions and on the other hand from technological conditions in relation to the cost-effective Production of the individual stand sheets.
ERSATZBLATT REPLACEMENT LEAF

Claims

Patentansprüche Claims
1. Ständerblechpaket gehäuseloser Drehstrommaschinen, ins¬ besondere mit quadratischem Querschnitt, in dessen Eck¬ bereichen axiale Kühlkanäle angeordnet sind, deren Lage und Abmessungen durch die im Preßrahmen angeordneten Öff¬ nungen vorgegeben sind, dadurch gekennzeichnet, daß im Ständerblechpaket jeweils im Bereich eines Kühlluftfen¬ sters (1) Längs- und Querkühlstege (2, 3) angeordnet sind und die dadurch gebildeten Kühlluftöffnungen (4) außer der Fertigungsöffnung (6) im äußersten Eckbereich, durchgehend innen an mindestens drei Seiten mit Rippen (5) versehen sind.1. stator core package, three-phase machines without housings, in particular with a square cross-section, in the corner regions of which axial cooling channels are arranged, the position and dimensions of which are predetermined by the openings arranged in the press frame, characterized in that in the stator core package each in the area of a cooling air fan sters (1) longitudinal and transverse cooling webs (2, 3) are arranged and the cooling air openings (4) thus formed, apart from the production opening (6) in the outermost corner area, are continuously provided with ribs (5) on the inside on at least three sides.
2. Ständerblechpaket gehäuseloser Drehstrommaschinen nach Anspruch 1 dadurch gekennzeichnet, daß auch die sich im äußersten Eckbereich befindliche Fertigungsöffnung (6) ganz oder teilweise mit Rippen (5) versehen ist.2. Stator laminated core packless three-phase machine according to claim 1, characterized in that the manufacturing opening (6) located in the outermost corner region is provided in whole or in part with ribs (5).
3. Ständerblechpaket gehäuseloser Drehstrommaschinen nach Anspruch 1 oder 2 dadurch gekennzeichnet, daß der durch die äußere Berandung gebildete Querschnitt des Kühlluft- fensters (1) des Ständerblechpaketes gleich oder größer als der Querschnitt der Öffnung des Preßrahmens (7) ist.3. stator core package housingless three-phase machine according to claim 1 or 2, characterized in that the cross section formed by the outer edge of the cooling air window (1) of the stator core is equal to or larger than the cross section of the opening of the press frame (7).
Ersat Replacement
EP93907762A 1992-03-28 1993-03-25 Set of stator laminations for uncased three-phase motors Ceased EP0625290A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4210219 1992-03-28
DE4210219 1992-03-28
PCT/DE1993/000292 WO1993020609A1 (en) 1992-03-28 1993-03-25 Set of stator laminations for uncased three-phase motors

Publications (1)

Publication Number Publication Date
EP0625290A1 true EP0625290A1 (en) 1994-11-23

Family

ID=6455311

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93907762A Ceased EP0625290A1 (en) 1992-03-28 1993-03-25 Set of stator laminations for uncased three-phase motors

Country Status (3)

Country Link
EP (1) EP0625290A1 (en)
CZ (1) CZ71694A3 (en)
WO (1) WO1993020609A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59706958D1 (en) * 1996-12-17 2002-05-16 Siemens Ag Electric air-cooled machine
FR2764133A1 (en) * 1997-05-29 1998-12-04 Abb Ind SYNCHRONOUS ELECTRIC MACHINE HAVING A DRIVING DEVICE
DE10222409B4 (en) * 2002-05-21 2013-02-28 Siemens Aktiengesellschaft Cooling channel design for compact three-phase motors
GB201913814D0 (en) * 2019-09-25 2019-11-06 Camcon Auto Ltd Stator assembly cooling
EP3859942A1 (en) * 2020-02-03 2021-08-04 ABB Schweiz AG Electrical machine with cooling capability

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3339094A1 (en) * 1983-10-28 1985-05-09 Franz Kessler KG, 7952 Bad Buchau ROTATING ELECTRICAL MACHINE
DE3625661A1 (en) * 1986-07-29 1988-02-04 Richard Halm ELECTRIC MOTOR

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9320609A1 *

Also Published As

Publication number Publication date
CZ71694A3 (en) 1994-11-16
WO1993020609A1 (en) 1993-10-14

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