EP1050890A2 - Electroaimant avec un paquet de tôles - Google Patents

Electroaimant avec un paquet de tôles Download PDF

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Publication number
EP1050890A2
EP1050890A2 EP00107464A EP00107464A EP1050890A2 EP 1050890 A2 EP1050890 A2 EP 1050890A2 EP 00107464 A EP00107464 A EP 00107464A EP 00107464 A EP00107464 A EP 00107464A EP 1050890 A2 EP1050890 A2 EP 1050890A2
Authority
EP
European Patent Office
Prior art keywords
sheet metal
housing
undercuts
laminated core
laminations
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.)
Granted
Application number
EP00107464A
Other languages
German (de)
English (en)
Other versions
EP1050890A3 (fr
EP1050890B1 (fr
Inventor
Ute Lohrey
Clemens Luchner
Dierk Schimmelpfennig
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1050890A2 publication Critical patent/EP1050890A2/fr
Publication of EP1050890A3 publication Critical patent/EP1050890A3/fr
Application granted granted Critical
Publication of EP1050890B1 publication Critical patent/EP1050890B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/02—Cores, Yokes, or armatures made from sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions

Definitions

  • the invention relates to an electromagnet, in particular for an electromagnetic one Actuator for actuating a gas exchange valve one Internal combustion engine, with a laminated core, which consists of a variety of stacked sheet metal laminations is built, carries a coil and in a housing is arranged.
  • a laminated core which consists of a variety of stacked sheet metal laminations is built, carries a coil and in a housing is arranged.
  • DE 196 46 937 A1 with regard to an electromagnetic actuator
  • DE 36 37 411 A1 or DE 37 04 579 A1 both of which Relate to the construction of laminated cores for electromagnets.
  • Laminated cores for electric motors, transformers or generally for electromagnets, the stacked and punched packages, i.e. through joint partial deformation, form-fitting with each other connected sheet metal lamellas are common prior art.
  • connection technology cannot suffice.
  • the sheet metal fins can be pinned together, but this will create the desired magnetic field the sheet metal fins can be disturbed or pinned disadvantageously short-circuited.
  • a similar problem arises in remaining the type of arrangement of the laminated core in the electromagnet housing.
  • the object of the present invention is to provide a remedial measure for the problems described.
  • the solution to this problem is characterized in that the laminated core is cast into the housing and has undercuts filled by the housing casting material.
  • Advantageous training and further education are included in the subclaims.
  • two functions are thus achieved by a single measure fulfilled, namely the individual sheet metal lamellae securely and firmly to Biechbyte held together and the latter fixed in the housing, if this laminated core in the housing in connection with the casting Manufacturing the same is poured.
  • a material for the housing i.e. as housing casting material, a light metal alloy (such as AlSi) are used, so the sheet metal parts then surrounding and this holding together this casting material the sheet metal lamellae advantageously not (or at most minimally) electrically connected in a conductive manner, since this casting material is known forms an oxide skin on contact with the air (i.e. on its surface), which acts as an electrical insulation layer. Adverse effects on the Magnetic field build-up is therefore not possible due to this connection technology fear.
  • the individual sheet metal fins are optimally both in Relation to each other and in their entirety as a laminated core in the Electromagnet-receiving housing held when in the laminated core suitable undercuts are provided, which when pouring the same in the housing can be filled with the housing casting material.
  • each of the sheet metal plates of the sheet metal package in particular, arranged identically
  • Have undercuts or only some of the sheet metal fins can possibly be in Interact with other sheet metal lamellas, whereby otherwise in the latter case, the sheet metal fins otherwise should be at least partially connected to one another, for example by the well-known punch packaging.
  • the undercuts mentioned can be designed in a variety of ways. It is essential that by filling these undercuts with the housing casting material, the laminated core is both sufficiently held together and connected to the housing.
  • the solidified casting material that fills the undercuts alone or in cooperation with another, but relatively simple connection technology (such as, for example, the punching package), prevents any relative movement of the individual sheet metal lamellae to one another and any movement of the sheet metal package in the housing.
  • Various possible configurations of the said undercuts are shown in the attached schematic diagrams, which are explained in more detail later as preferred exemplary embodiments of the invention.
  • the laminated core before casting with a Connection layer is provided when pouring into the housing the housing casting material forms a material bond.
  • this additional composite over the surface of the laminated core considered partially or collectively can be provided, and the always reinforced or supported the fixation of the sheet metal package in the housing.
  • connection layer for example, by thermal spraying, by galvanizing, by brushing or the like coated with the named connection layer are melted during the subsequent casting process becomes.
  • Suitable metals or Fluxing agents are used that form an intermetallic Phase between the housing casting material (in particular a light metal alloy) and favor the laminated core material (preferably pure iron).
  • connection layer only makes sense if the creation of electrical losses in the laminated core is negligible, because after all with the integral bond, an intermetallic is formed at the same time and thus electrically conductive phase between the housing casting material and the laminated core material. But should such electrical Losses should be avoided between the sheet metal fins and an electrical insulation layer is provided for said connection layer his.
  • the laminated core is coated with the connection layer before coating with a suitable electrical insulation layer, for example magnesium oxide, coated to all the advantages of the positive connection to be able to use without an electrical short between the sheet metal fins is brought about.
  • a suitable electrical insulation layer for example magnesium oxide
  • the already mentioned material connection bring about when pouring the sheet metal package into the housing, for example. by PVD coating (powder vapor coating) first the insulation layer applied and then the preferably metallic compound layer.
  • This metallic connection layer can be applied otherwise by immersing the laminated cores in a liquid Al alloy, for example until the intermetallic compound forms. Im a subsequent one The step is then encased in the laminated core Cast housing, which creates the cohesive connection.
  • Reference number 1 denotes a laminated core of an electromagnet, which can be installed, for example, in an electromagnetic actuator; alternatively, this laminated core 1 can also be part of a transformer or an electric motor.
  • the laminated core 1 accordingly carries a coil (magnet coil), ie a winding of electrically conductive wire, which is not shown here for the sake of simplicity (and since it has no relation to the invention).
  • Fig.1a two recesses 2 can be seen in the laminated core 1, in which this (magnetic) coil with its two (here longer) legs is or can be inserted. Also for the sake of simplicity, these recesses 2 are not shown in the further exemplary embodiments or figure representations, but of course are also present there.
  • the laminated core 1 is constructed from a multiplicity of laminated laminations 3 stacked on one another, as shown in FIGS. 1b, 3b, 4b, 5b and 6 .
  • These sheet metal lamellae 3 can be connected to one another as usual by die-cut packaging, ie, by means of such a die-cut packetization, the sheet metal lamellae 3 are basically held together to form the sheet metal packet 1, although this cohesion can only withstand relatively low forces.
  • this laminated core 1 is cast into a housing 4 which accommodates the electromagnet (and thus the laminated core 1 with the said coil).
  • a fraction of this housing 4 is (only) shown in Figures 1a, 1b .
  • the housing 4 has a cuboid shape and accommodates the laminated core 1 between its base plate 4a (which is at the top in FIGS. 1a , 1b ) and the (four) side walls 4b, 4c.
  • the laminated core 1 is held in a form-fitting manner in the housing 4 or on its base plate 4a and in the exemplary embodiment according to FIGS.
  • undercuts 5 are for this purpose with the housing -Gussmaterial filled so that these undercuts 5 at the same time the individual laminations 3 are held together to the laminated core 1.
  • the laminated core 1 is cast into the housing 4.
  • This housing 4 is thus produced in a casting process, preferably using a light metal alloy as the casting material.
  • the housing casting material in the undercuts 5, which are in the laminated core 1 (or in the individual Sheet metal fins 3 of the same) are provided, penetrates and this Filled undercuts 5.
  • the solidification of the casting material is then not only the laminated core 1 securely in the housing 4 or on its base plate 4a (as well as on the side walls 4b, 4c), but at the same time there are also the sheet metal plates 3 securely fixed relative to each other.
  • the undercuts 5 are designed as breakthrough sectors 5a introduced into the edge region of the sheet-metal fins 3.
  • Each of the laminations 3 of the laminated core 1 has undercuts 5 of the same shape and arrangement, so that the breakthrough sectors 5a of the individual laminations 3 in the illustration according to FIG .
  • a first undercut 5 (or breakthrough sector 5a) faces the base plate 4a of the housing 4 and a further undercut 5 each faces the two opposite side walls 4b, against which all the sheet metal fins 3 rest with their side edges.
  • the undercuts 5 formed in this way are referred to as the breakthrough sector 5a because they essentially resemble a sector of a circular breakthrough, for example, the angle of the selected sector being, however, so large that an undercut actually occurs. Only the undercut 5 (or breakthrough sector 5a) facing the base plate 4a should therefore, due to its filling with the cast material of the housing 4, prevent the entire laminated core 1 or each individual laminated plate 3 from moving away from the base plate 4a (down here) to move away.
  • Such an undercut 5 in the form of the breakthrough sector 5a can also be shaped differently than shown, for example similar to the projection 5b of the exemplary embodiment according to FIG. 2b which will be explained later, but in a form reflected in the surface of the sheet metal lamella 3.
  • the undercuts 5 are formed by projections 5b protruding from the edge region of the sheet metal laminations 3, with each of the sheet metal laminations 3 of the laminated core 1 again having an identically shaped and arranged projection 5b, which is the base plate 4a of the housing 4 (not shown here for the sake of simplicity).
  • Each of these projections 5b protrudes through the casting of the laminated core 1 into the housing 4, as it were, into its base plate 4a and thus anchors the associated laminated plate 3 and the entire laminated core 1 securely in the housing 4.
  • these projections 5b are dovetail-shaped, the through the undercut 5 indicated by the arrow to the reference number 5 can be seen particularly clearly, ie the housing casting material penetrates into this area indicated by the arrow and then fixes each individual sheet metal lamella 3 on the base plate 4a when it solidifies. Because of the relatively large area or the large circumference of this undercut 5, a single projection 5b of this type is sufficient for each sheet metal lamella 3, but of course such projections 5b can also be provided on the edges of the sheet metal lamellae 3 facing the side walls 4b.
  • the undercuts 5 are formed by projections 5b protruding from the edge region of the sheet-metal fins 3, which, however, do not have an outer contour forming an undercut here, but rather are each provided with an opening 5c.
  • the housing casting material penetrates into these (for example circular) openings 5c when the laminated core 1 is poured into the housing 4 to be formed in the casting process, so that these openings 5c form the undercuts 5 mentioned and again each sheet metal plate 3 is optimally fixed to the housing 4 becomes.
  • the apertures 5c (or the projections 5b) which are again in each of the plate fins 3 of the laminated core 1 is formed the same and arranged in the same thereto protrude in the opposite side walls 4b of the casing 4 into (see Fig. .1a ).
  • the openings 5c or the projections 5b in each of the laminations 3 of the laminated core 1 are shaped the same way, but with respect to the respectively adjacent laminations 3 on the same edge, but offset. This results in a particularly stable hold.
  • each sheet metal lamella 3 has an undercut 5 which arises in cooperation with the adjacent sheet metal lamellae 3 and is each formed by a projection 5b which is at least partially outside the plane the plate lamella 3 lies.
  • These projections 5b are corrugated parallel to each other and form an undercut 5 between each of them, which is filled with the casting material of the housing 4, that is to say these projections 5b each lie after the casting of the laminated core 1 in the housing 4, almost like an anchor, preferably in the base plate 4a.
EP20000107464 1999-05-03 2000-04-06 Electroaimant avec un paquet de tôles Expired - Lifetime EP1050890B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19920094 1999-05-03
DE1999120094 DE19920094A1 (de) 1999-05-03 1999-05-03 Elektromagnet mit einem Blechpaket

Publications (3)

Publication Number Publication Date
EP1050890A2 true EP1050890A2 (fr) 2000-11-08
EP1050890A3 EP1050890A3 (fr) 2001-09-12
EP1050890B1 EP1050890B1 (fr) 2008-12-24

Family

ID=7906674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000107464 Expired - Lifetime EP1050890B1 (fr) 1999-05-03 2000-04-06 Electroaimant avec un paquet de tôles

Country Status (2)

Country Link
EP (1) EP1050890B1 (fr)
DE (2) DE19920094A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002071420A1 (fr) * 2001-03-02 2002-09-12 Johnson Controls Automotive Electronics Actionneur electromagnetique
DE10134708A1 (de) * 2001-07-21 2003-02-06 Heinz Leiber Elektromagnet
EP4089882A1 (fr) * 2021-05-14 2022-11-16 GE Energy Power Conversion Technology Ltd. Plaque de compaction, masse magnétique associée, stator, rotor, machine électrique rotative et système d'entraînement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1188524A (fr) * 1956-07-28 1959-09-23 Procédé de fabrication de paquets de tôles pour noyaux magnétiques, destinés notamment à des appareils de commande électriques
DE3046072A1 (de) * 1980-03-07 1981-09-24 VEB Schwermaschinenbau "Karl Liebknecht" Magdeburg-Kombinat für Dieselmotoren und Industrieanlagen, DDR 3011 Magdeburg Magnetbetaetigte brennstoffeinspritzvorrichtung
DE3203196A1 (de) * 1982-01-30 1983-08-04 Messer Griesheim Gmbh, 6000 Frankfurt Verfahren zum verbinden eines aus mehreren lagen bestehenden eisenkerns
DE4132839A1 (de) * 1991-02-08 1992-08-13 Diesel Tech Corp Magnetspulenstaenderanordnung fuer elektronisch gesteuerte treibstoffeinspritzanlagen und verfahren zur herstellung derselben
US5176946A (en) * 1991-05-10 1993-01-05 Allen-Bradley Company, Inc. Laminated contactor core with blind hole

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6936329U (de) * 1968-09-24 1973-11-08 Elektrokovina Tovarna Elektrok Drosselspule oder transformator.
DE2309727C3 (de) * 1973-02-27 1979-05-03 Fa. Hermann Schwabe, 7067 Urbach Verfahren zur Herstellung von insbesondere als Vorschaltgerät für Gasentladungslampen zu verwendende Drosseln oder Transformatoren
DE19645098C2 (de) * 1996-11-01 2000-09-21 Vossloh Schwabe Gmbh Drossel und Verfahren zu deren Herstellung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1188524A (fr) * 1956-07-28 1959-09-23 Procédé de fabrication de paquets de tôles pour noyaux magnétiques, destinés notamment à des appareils de commande électriques
DE3046072A1 (de) * 1980-03-07 1981-09-24 VEB Schwermaschinenbau "Karl Liebknecht" Magdeburg-Kombinat für Dieselmotoren und Industrieanlagen, DDR 3011 Magdeburg Magnetbetaetigte brennstoffeinspritzvorrichtung
DE3203196A1 (de) * 1982-01-30 1983-08-04 Messer Griesheim Gmbh, 6000 Frankfurt Verfahren zum verbinden eines aus mehreren lagen bestehenden eisenkerns
DE4132839A1 (de) * 1991-02-08 1992-08-13 Diesel Tech Corp Magnetspulenstaenderanordnung fuer elektronisch gesteuerte treibstoffeinspritzanlagen und verfahren zur herstellung derselben
US5176946A (en) * 1991-05-10 1993-01-05 Allen-Bradley Company, Inc. Laminated contactor core with blind hole

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002071420A1 (fr) * 2001-03-02 2002-09-12 Johnson Controls Automotive Electronics Actionneur electromagnetique
DE10134708A1 (de) * 2001-07-21 2003-02-06 Heinz Leiber Elektromagnet
EP4089882A1 (fr) * 2021-05-14 2022-11-16 GE Energy Power Conversion Technology Ltd. Plaque de compaction, masse magnétique associée, stator, rotor, machine électrique rotative et système d'entraînement
US11901767B2 (en) 2021-05-14 2024-02-13 Ge Energy Power Conversion Technology Limited Compaction plate, associated magnetic mass, stator, rotor, rotating electric machine and driving system

Also Published As

Publication number Publication date
EP1050890A3 (fr) 2001-09-12
EP1050890B1 (fr) 2008-12-24
DE19920094A1 (de) 2000-11-09
DE50015495D1 (de) 2009-02-05

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