EP3607569B1 - Electrically insulated electrical conducting ribbon, in particular for electrical motors and transformators - Google Patents

Electrically insulated electrical conducting ribbon, in particular for electrical motors and transformators Download PDF

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Publication number
EP3607569B1
EP3607569B1 EP18715509.8A EP18715509A EP3607569B1 EP 3607569 B1 EP3607569 B1 EP 3607569B1 EP 18715509 A EP18715509 A EP 18715509A EP 3607569 B1 EP3607569 B1 EP 3607569B1
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EP
European Patent Office
Prior art keywords
strip
enamel
electrical conductor
thickness
face
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EP18715509.8A
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German (de)
French (fr)
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EP3607569A1 (en
Inventor
Marcus Walder
Stefan Ziegler
Volker Wandelt
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Alanod GmbH and Co KG
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Alanod GmbH and Co KG
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Publication of EP3607569A1 publication Critical patent/EP3607569A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/0009—Details relating to the conductive cores
    • H01B7/0018—Strip or foil conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/25—Magnetic cores made from strips or ribbons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2847—Sheets; Strips

Definitions

  • the present invention relates to an electrically insulated electrical conductor strip, in particular for electric motors and transformers, with a strip-shaped electrical conductor which has an upper cover surface and a lower cover surface, two side edge surfaces and one end edge surface each, and with electrical insulation on at least one cover surface of the band is arranged.
  • Electrical conductor strips of this type are referred to, for example, as electrical steel or electrical steel and are used to produce magnetic circuits for electrical machines, i.e. cores for dynamos, electric motors, transformers, relays, contactors, choke coils, ignition coils, electricity meters and controllable deflection magnets.
  • Cold-rolled strips and sheets made from iron-silicon alloys are particularly common. Since eddy currents occur in a coil core made of solid material under the influence of changing magnetic fields, which can cause the core to become hot, the cores are exclusively designed as laminated and insulated sheets in packages or as wound cut strip cores.
  • wire enamels such as THEIC-modified polyester imides, polyamides and epoxies, solderable wire enamels made of polyurethane and adhesive enamels such as e.g. B. made of PVB (polyvinyl butyral) and polyamide.
  • GB 900 519 A and EP 3 109 873 A1 disclose electrical conductor tapes coated with an insulating layer of latex and further wrapped in an insulating adhesive tape.
  • the present invention has for its object to provide an electrically insulated electrical conductor strip of the type described above, which with can be produced with reduced effort, in particular using a lacquer for the insulation, but has a high electrical insulating effect.
  • the insulation comprises a layer of lacquer and an adhesive film tape which is glued to the lower cover surface and/or the upper cover surface of the strip-shaped electrical conductor, at least in one area , which is immediately adjacent to a side edge surface.
  • the edge of the strip is laminated with a temperature-stable adhesive tape (e.g. made of polyimide) before (or alternatively after) painting.
  • a temperature-stable adhesive tape e.g. made of polyimide
  • lacquer In comparison with the state of the art, a large area of the expensive plastic layer can be replaced by lacquer without the electrical insulation effect at the edge of the strip being impaired.
  • This in 1 illustrated cable strip 1 comprises a strip-shaped electrical conductor 2, which has an upper cover surface 2a and a lower cover surface 2b, two side edge surfaces 2c and each end has a front edge surface, not shown. Furthermore, the cable strip 1 according to the invention comprises an electrical insulation 3 which is applied to at least one side of the strip 1--in the illustrated embodiment to both the lower cover surface 2b and the upper cover surface 2a.
  • the insulation comprises a lacquer layer 3a and an adhesive foil tape 3b, which is made of plastic and is glued to the lower cover surface 2b and/or the upper cover surface 2a of the strip-shaped electrical conductor 2, at least in each case in an area 4 that is directly adjacent to a Side edge surface 2c adjacent.
  • the film adhesive tape 3b has a projection 5 in relation to the side edge surface 2c of the strip-shaped electrical conductor 1, as a result of which leakage currents can be prevented.
  • the overhang 5 can preferably have a length L in the range 0 cm ⁇ L ⁇ 5 cm.
  • the electrical conductor 2 in the form of a strip can in particular consist of aluminum or an aluminum alloy and preferably have a thickness D in the range from 0.1 mm to 1.5 mm.
  • the paint of the paint layer 3a which can be applied by immersion, such as electro-dip painting, by brushing, rolling, spinning, spraying, in particular in a continuous belt process, and is then cured, causes at least the lower cover surface 2b and/or the upper Top surface 2a are sufficiently electrically isolated.
  • the lacquer layer 3a can be formed from a lacquer based on organic polymers, such as an acrylic, epoxy, polyester, polyamide or fluoropolymer lacquer, or based on sol-gel compositions, in particular from a wire lacquer, such as a THEIC-modified polyesterimide. It can preferably have a thickness DL in the range from 5 ⁇ m to 50 ⁇ m. As shown, this thickness DL can also be smaller in the area of the film adhesive tape 3b, in particular so that an even surface O of the insulation 3 is produced.
  • the film adhesive tape 3b can preferably have a thickness DK in the range from 3 ⁇ m to 20 ⁇ m, this thickness DK preferably being at least half as large as the thickness DL of the paint layer 3a in the area where there is no film adhesive tape 3b.
  • the region 4, which directly adjoins the side edge surface 2c of the strip-shaped electrical conductor 2, can have a width B in the range from 0.2 cm to 4.5 cm, preferably in the range from 0.5 to 1.5 cm.
  • the film adhesive tape 3b is only applied on one side with the overhang 5, and the lacquer layer 3a runs out on the film adhesive tape 3b like a meniscus and ends in front of the overhang 5.
  • the lower cover surface 2b and the respective adjacent side edge surface 2c are provided with the lacquer layer 3a, the Lacquer layer 3a at the transition to the side edge surface 2c and can have such a thickness DL on this, which in itself is not sufficient for the required electrical insulation.
  • top surface 2b and the side edge surface 2c each have no electrical insulation and in particular no lacquer layer 3a.
  • FIG 5 a variant is shown in which the film adhesive tape 3b is glued in a C-shape starting from the two cover surfaces 2a, 2b around the side edge surface 2c with a cover section 3c.
  • the lacquer layer 3a ends like a meniscus on the film adhesive tape 3b before the start of the cover section 3c.
  • lacquer layer 3a is only applied on one side to the upper cover surface 2a and to the film adhesive tape 3b up to the beginning of the cover section 3c.
  • the electrical conductor 2 has a reduced strip thickness D 1 in the area in front of its side edge surface 2c in comparison to the strip thickness D in the remaining strip area.
  • the tape thickness reduction in the area of the cover surfaces 2a, 2b is the same and is less than/equal to the thickness DK of the film adhesive tape 3b.
  • the lacquer layer 3a runs continuously up to the cover section 3c.
  • the embodiment shows only one possibility of lamination with the film adhesive tape 3b.
  • an adhesive strip 3b can also be placed around the edge surface 2c, or the lacquer layer 3a could be located under the foil adhesive tape 3b.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Insulated Conductors (AREA)
  • Laminated Bodies (AREA)
  • Adhesive Tapes (AREA)
  • Organic Insulating Materials (AREA)

Description

Die vorliegende Erfindung betrifft ein elektroisoliertes elektrisches Leitungsband, insbesondere für Elektromotoren und Transformatoren, mit einem bandförmigen elektrischen Leiter, der eine obere Deckfläche und eine untere Deckfläche, zwei Seitenkantenflächen und endseitig jeweils eine Stirnkantenfläche aufweist, und mit einer elektrischen Isolierung, die auf mindestens einer Deckfläche des Bandes angeordnet ist.The present invention relates to an electrically insulated electrical conductor strip, in particular for electric motors and transformers, with a strip-shaped electrical conductor which has an upper cover surface and a lower cover surface, two side edge surfaces and one end edge surface each, and with electrical insulation on at least one cover surface of the band is arranged.

Derartige elektrische Leitungsbänder werden beispielsweise als Elektroblech oder Elektroband bezeichnet und zur Herstellung von magnetischen Kreisen für elektrische Maschinen, also von Kernen für Dynamos, Elektromotoren, Transformatoren, Relais, Schaltschützen, Drosselspulen, Zündspulen, Stromzähler und steuerbare Ablenkmagneten eingesetzt. Üblich sind dabei insbesondere kaltgewalzte Bänder und Bleche aus Eisen-Silizium-Legierungen. Da unter dem Einfluss veränderlicher Magnetfelder in einem Spulenkern aus Vollmaterial Wirbelströme entstehen, wodurch der Kern heiß werden kann, werden die Kerne ausschließlich als lamellierte und isolierte Bleche in Paketen oder als gewickelte Schnittbandkerne ausgeführt.Electrical conductor strips of this type are referred to, for example, as electrical steel or electrical steel and are used to produce magnetic circuits for electrical machines, i.e. cores for dynamos, electric motors, transformers, relays, contactors, choke coils, ignition coils, electricity meters and controllable deflection magnets. Cold-rolled strips and sheets made from iron-silicon alloys are particularly common. Since eddy currents occur in a coil core made of solid material under the influence of changing magnetic fields, which can cause the core to become hot, the cores are exclusively designed as laminated and insulated sheets in packages or as wound cut strip cores.

Um eine Isolation zwischen zwei übereinander liegenden Leiterband-Lagen zu erreichen, werden heute in Metallbandspulen beispielsweise Kunststofflagen als Isolierung eingewickelt. Dazu werden oft Polyimid-Folien verwendet, die beispielsweise von der Fa. DuPont unter dem Namen Kapton® vertrieben werden. Um den Aufwand bei der Herstellung einer Metallbandspule zu verringern, bestünde eine Alternative zur Legung von Folien zwischen die Bänder darin, das Band einseitig oder beidseitig mit einem Elektroisolierlack zu lackieren, wie dies bekanntermaßen mit Leitern realisiert wird, die einen runden Querschnitt aufweisen. Hierzu sind Drahtlacke bekannt, bei denen es sich um Isolierlacke auf Kunstharzbasis handelt, die als möglichst dünne, homogene, elektrisch isolierende Filme auf Kupfer- oder Aluminiumdrähte aufgebracht werden können. Dabei unterscheidet man verschiedene Gruppen von Drahtlacken, wie THEIC-modifizierten Polyesterimide, Polyamiden und Epoxiden, lötbaren Drahtlacke aus Polyurethan und Kleblacken, wie z. B. aus PVB (Polyvinylbutyral) und Polyamid.In order to achieve insulation between two conductor strip layers lying one above the other, plastic layers, for example, are used today in metal strip coils insulation wrapped. Polyimide films are often used for this purpose, which are sold, for example, by DuPont under the name Kapton® . In order to reduce the effort involved in producing a metal tape reel, an alternative to placing foils between the tapes would be to coat the tape on one or both sides with an electrical insulating varnish, as is known to be the case with conductors having a round cross section. Wire enamels are known for this purpose, which are synthetic resin-based insulating enamels that can be applied to copper or aluminum wires as thin, homogeneous, electrically insulating films as possible. A distinction is made between different groups of wire enamels, such as THEIC-modified polyester imides, polyamides and epoxies, solderable wire enamels made of polyurethane and adhesive enamels such as e.g. B. made of PVB (polyvinyl butyral) and polyamide.

Bei der Lackierung eines elektrischen Leiterbandes mit rechteckigem Querschnitt, das geometrisch als quaderförmig beschrieben werden kann und damit eine obere und untere Deckfläche, zwei Seitenkantenflächen und endseitig jeweils eine Stirnkantenfläche aufweist, bleiben aber insbesondere die beiden Seitenkantenflächen dann regelmäßig unzureichend oder gar nicht lackiert. Dies liegt daran, dass sich vor der eigentlichen - z. B. durch ein so genanntes Einbrennen erfolgenden - Polymerisation des Drahtlacks aufgrund der Oberflächenspannungen ein Meniskus bildet, wodurch sich dann während der Lackaushärtung an der jeweiligen Ober- und Unterkante der Seitenkantenflächen, wo diese jeweils an die Deckflächen grenzen, die Lackschicht auf ein Minimum verjüngt oder gar Defekte bildet. Hier ist die elektrische Isolationswirkung in der Folge dann unzureichend. Es kann zu Stromüberschlägen zwischen den Lagen und/oder zumindest zur Ausbildung von Kriechströmen kommen.When coating an electrical conductor strip with a rectangular cross section, which can be described geometrically as cuboid and thus has an upper and lower cover surface, two side edge surfaces and one end surface at each end, the two side edge surfaces in particular then usually remain insufficiently coated or not coated at all. This is because before the actual - e.g. B. by a so-called baking - polymerization of the wire enamel due to the surface tension forms a meniscus, which then during the paint curing on the respective upper and lower edge of the side edge surfaces, where they border on the cover surfaces, the lacquer layer tapers to a minimum or even forms defects. As a result, the electrical insulation effect is insufficient here. Current flashovers between the layers and/or at least leakage currents can occur.

GB 900 519 A und EP 3 109 873 A1 offenbaren elektrische Leitungsbänder, die mit einer isolierenden Lachschicht beschichtet sind, und weiter in einem isolierenden Klebeband eingewickelt sind. GB 900 519 A and EP 3 109 873 A1 disclose electrical conductor tapes coated with an insulating layer of latex and further wrapped in an insulating adhesive tape.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein elektroisoliertes elektrisches Leitungsband der eingangs beschriebenen Art zu schaffen, das mit verringertem Aufwand, insbesondere unter Einsatz eines Lacks für die Isolierung, herstellbar ist, jedoch eine hohe elektrische Isolationswirkung aufweist.The present invention has for its object to provide an electrically insulated electrical conductor strip of the type described above, which with can be produced with reduced effort, in particular using a lacquer for the insulation, but has a high electrical insulating effect.

Die vorstehende Aufgabe wird erfindungsgemäß, wie im Anspruch 1 definiert, dadurch gelöst, dass die Isolierung eine Lackschicht umfasst sowie ein Folienklebeband, das auf die untere Deckfläche und/oder die obere Deckfläche des bandförmigen elektrischen Leiters geklebt ist, und zwar mindestens jeweils in einem Bereich, der unmittelbar an eine Seitenkantenfläche angrenzt.The above object is achieved according to the invention, as defined in claim 1, in that the insulation comprises a layer of lacquer and an adhesive film tape which is glued to the lower cover surface and/or the upper cover surface of the strip-shaped electrical conductor, at least in one area , which is immediately adjacent to a side edge surface.

Die Bandkante wird insbesondere vor (bzw. alternativ nach) der Lackierung mit einem temperaturstabilen Klebeband (z.B. aus Polyimid) kaschiert. So kann - im Vergleich mit dem Stand der Technik - eine große Fläche der teuren Kunststofflage durch Lack ersetzt werden, ohne dass die Elektroisolationswirkung an der Bandkante beeinträchtigt wird.The edge of the strip is laminated with a temperature-stable adhesive tape (e.g. made of polyimide) before (or alternatively after) painting. In comparison with the state of the art, a large area of the expensive plastic layer can be replaced by lacquer without the electrical insulation effect at the edge of the strip being impaired.

Weitere vorteilhafte Ausführungen der Erfindung sind in den Unteransprüchen und in der nachfolgenden detaillierten Beschreibung enthalten.Further advantageous embodiments of the invention are contained in the dependent claims and in the following detailed description.

Anhand eines durch die beiliegende Zeichnung veranschaulichten Ausführungsbeispiels wird die Erfindung näher erläutert. Dabei zeigt Fig. 1 in schematisierter Darstellung ein erfindungsgemäßes Leitungsband. Die Figuren 2 bis 7 zeigen Varianten des erfindungsgemäßen Leitungsbandes.The invention will be explained in more detail using an exemplary embodiment illustrated by the attached drawing. while showing 1 a schematic representation of a conduction band according to the invention. the Figures 2 to 7 show variants of the line strip according to the invention.

Zu der anschließenden Beschreibung wird ausdrücklich betont, dass die Erfindung nicht auf das Ausführungsbeispiel und dabei auch nicht auf alle oder mehrere Merkmale von beschriebenen Merkmalskombinationen beschränkt ist. Vielmehr kann jedes einzelne Teilmerkmal des Ausführungsbeispiels auch losgelöst von allen anderen im Zusammenhang damit beschriebenen Teilmerkmalen für sich und auch in Kombination mit anderen Teilmerkmalen eine erfinderische Bedeutung haben, soweit es innerhalb des Umfangs der beiliegenden Ansprüche bleibt. In den Figuren 2 bis 7 sind gleiche Teile des Leitungsbandes mit denselben Bezugsziffern gekennzeichnet.With regard to the subsequent description, it is expressly emphasized that the invention is not limited to the exemplary embodiment and is also not limited to all or more features of the feature combinations described. Rather, each individual partial feature of the exemplary embodiment can also have an inventive significance independently of all other partial features described in connection with it and also in combination with other partial features, insofar as it remains within the scope of the appended claims. In the Figures 2 to 7 Identical parts of the line strip are marked with the same reference numbers.

Das in Fig. 1 dargestellte erfindungsgemäße Leitungsband 1 umfasst einen bandförmigen elektrischen Leiter 2, der eine obere Deckfläche 2a und eine untere Deckfläche 2b, zwei Seitenkantenflächen 2c und endseitig jeweils eine nicht dargestellte Stirnkantenfläche aufweist. Des Weiteren umfasst das erfindungsgemäße Leitungsband 1 eine elektrischen Isolierung 3, die auf mindestens einer Seite des Bandes 1 - in der dargestellten Ausführung auf sowohl auf die untere Deckfläche 2b als auch auf die obere Deckfläche 2a - aufgebracht ist.This in 1 illustrated cable strip 1 according to the invention comprises a strip-shaped electrical conductor 2, which has an upper cover surface 2a and a lower cover surface 2b, two side edge surfaces 2c and each end has a front edge surface, not shown. Furthermore, the cable strip 1 according to the invention comprises an electrical insulation 3 which is applied to at least one side of the strip 1--in the illustrated embodiment to both the lower cover surface 2b and the upper cover surface 2a.

Die Isolierung umfasst eine Lackschicht 3a sowie ein Folienklebeband 3b, welches aus Kunststoff besteht und das auf die untere Deckfläche 2b und/oder die obere Deckfläche 2a des bandförmigen elektrischen Leiters 2 geklebt ist, und zwar mindestens jeweils in einem Bereich 4, der unmittelbar an eine Seitenkantenfläche 2c angrenzt.The insulation comprises a lacquer layer 3a and an adhesive foil tape 3b, which is made of plastic and is glued to the lower cover surface 2b and/or the upper cover surface 2a of the strip-shaped electrical conductor 2, at least in each case in an area 4 that is directly adjacent to a Side edge surface 2c adjacent.

Das Folienklebeband 3b weist einen Überstand 5 gegenüber der Seitenkantenfläche 2c des bandförmigen elektrischen Leiters 1 auf, wodurch Kriechströme unterbunden werden können. Der Überstand 5 kann bevorzugt eine Länge L im Bereich 0 cm < L ≤ 5 cm aufweisen.The film adhesive tape 3b has a projection 5 in relation to the side edge surface 2c of the strip-shaped electrical conductor 1, as a result of which leakage currents can be prevented. The overhang 5 can preferably have a length L in the range 0 cm<L≦5 cm.

Der bandförmige elektrische Leiter 2 kann insbesondere aus Aluminium oder aus einer Aluminiumlegierung bestehen und bevorzugt eine Dicke D im Bereich von 0,1 mm bis 1,5 mm aufweisen.The electrical conductor 2 in the form of a strip can in particular consist of aluminum or an aluminum alloy and preferably have a thickness D in the range from 0.1 mm to 1.5 mm.

Der Lack der Lackschicht 3a, welcher durch Eintauchen, wie durch eine Elektrotauchlackierung, durch Aufpinseln, Aufwalzen, Schleudern, Spritzen, insbesondere in einem Banddurchlaufverfahren, aufgebracht werden kann und dann ausgehärtet wird, bewirkt, dass zumindest die untere Deckfläche 2b und/oder die obere Deckfläche 2a hinreichend elektrisch isoliert sind.The paint of the paint layer 3a, which can be applied by immersion, such as electro-dip painting, by brushing, rolling, spinning, spraying, in particular in a continuous belt process, and is then cured, causes at least the lower cover surface 2b and/or the upper Top surface 2a are sufficiently electrically isolated.

Die Lackschicht 3a kann dabei aus einem Lack auf der Basis organischer Polymere, wie aus einem Acryl-, Epoxy-, Polyester-, Polyamid- oder Fluorpolymerlack, oder auf der Basis von Sol-Gel-Zusammensetzungen gebildet sein, insbesondere aus einem Drahtlack, wie einem THEIC-modifizierten Polyesterimid. Sie kann bevorzugt eine Dicke DL im Bereich von 5 µm bis 50 µm aufweisen. Wie dargestellt, kann im Bereich des Folienklebebandes 3b diese Dicke DL auch kleiner sein, insbesondere, damit eine ebene Oberfläche O der Isolierung 3 entsteht.The lacquer layer 3a can be formed from a lacquer based on organic polymers, such as an acrylic, epoxy, polyester, polyamide or fluoropolymer lacquer, or based on sol-gel compositions, in particular from a wire lacquer, such as a THEIC-modified polyesterimide. It can preferably have a thickness DL in the range from 5 μm to 50 μm. As shown, this thickness DL can also be smaller in the area of the film adhesive tape 3b, in particular so that an even surface O of the insulation 3 is produced.

Das Folienklebeband 3b kann bevorzugt eine Dicke DK im Bereich von 3 µm bis 20 µm aufweisen, wobei diese Dicke DK vorzugsweise mindestens halb so groß sein kann wie die Dicke DL der Lackschicht 3a in dem Bereich, wo sich kein Folienklebeband 3b befindet.The film adhesive tape 3b can preferably have a thickness DK in the range from 3 μm to 20 μm, this thickness DK preferably being at least half as large as the thickness DL of the paint layer 3a in the area where there is no film adhesive tape 3b.

Der Bereich 4, der unmittelbar an die Seitenkantenfläche 2c des bandförmigen elektrischen Leiters 2 angrenzt, kann eine Breite B im Bereich von 0,2 cm bis 4,5 cm, vorzugsweise im Bereich von 0,5 bis 1,5 cm, aufweisen.The region 4, which directly adjoins the side edge surface 2c of the strip-shaped electrical conductor 2, can have a width B in the range from 0.2 cm to 4.5 cm, preferably in the range from 0.5 to 1.5 cm.

In den Fig. 2 bis 7 sind weitere Ausführungsformen dargestellt.In the Figures 2 to 7 further embodiments are shown.

In Fig. 2 sind die beiden Überstände 5 der beidseitig aufgebrachten Klebebänder 3a, 3b miteinander verklebt.In 2 the two projections 5 of the adhesive tapes 3a, 3b applied on both sides are glued together.

In Fig. 3 ist das Folienklebeband 3b nur einseitig mit dem Überstand 5 aufgebracht, und die Lackschicht 3a läuft auf dem Folienklebeband 3b meniskusartig aus und endet vor dem Überstand 5. Hierbei ist die untere Deckfläche 2b und die jeweils angrenzende Seitenkantenfläche 2c mit der Lackschicht 3a versehen, wobei die Lackschicht 3a am Übergang zur Seitenkantenfläche 2c und auf dieser eine derartige Dicke DL haben kann, die für sich betrachtet nicht für die geforderte elektrische Isolierung ausreichend ist.In 3 the film adhesive tape 3b is only applied on one side with the overhang 5, and the lacquer layer 3a runs out on the film adhesive tape 3b like a meniscus and ends in front of the overhang 5. The lower cover surface 2b and the respective adjacent side edge surface 2c are provided with the lacquer layer 3a, the Lacquer layer 3a at the transition to the side edge surface 2c and can have such a thickness DL on this, which in itself is not sufficient for the required electrical insulation.

In Fig. 4 ist eine Alternative zu Fig. 3 dargestellt, bei der die Deckfläche 2b und die Seitenkantenfläche 2c jeweils keine elektrische Isolierung und insbesondere keine Lackschicht 3a aufweist.In 4 is an alternative to 3 shown, in which the top surface 2b and the side edge surface 2c each have no electrical insulation and in particular no lacquer layer 3a.

In Fig. 5 ist eine Variante dargestellt, bei der das Folienklebeband 3b C-förmig ausgehend von den beiden Deckflächen 2a, 2b um die Seitenkantenfläche 2c herum mit einem Deckabschnitt 3c geklebt ist. Auch bei dieser Ausführung endet die Lackschicht 3a meniskusartig auf dem Folienklebeband 3b vor Beginn des Deckabschnitts 3c.In figure 5 a variant is shown in which the film adhesive tape 3b is glued in a C-shape starting from the two cover surfaces 2a, 2b around the side edge surface 2c with a cover section 3c. In this embodiment, too, the lacquer layer 3a ends like a meniscus on the film adhesive tape 3b before the start of the cover section 3c.

In Fig. 6 ist eine Alternative zu Fig. 3 dargestellt. Hierbei ist die Lackschicht 3a nur einseitig auf der oberen Deckfläche 2a sowie auf dem Folienklebeband 3b bis zu Beginn des Deckabschnitts 3c aufgebracht.In 6 is an alternative to 3 shown. In this case, the lacquer layer 3a is only applied on one side to the upper cover surface 2a and to the film adhesive tape 3b up to the beginning of the cover section 3c.

Fig. 7 zeigt eine Variante zu Fig. 5. Hier weist der elektrische Leiter 2 im Bereich vor seiner Seitenkantenfläche 2c eine reduzierte Banddicke D1 im Vergleich zur Banddicke D im übrigen Bandbereich auf. Hierbei ist insbesondere die Banddickenreduzierung im Bereich der Deckflächen 2a, 2b gleich groß und ist kleiner/gleich der Dicke DK des Folienklebebandes 3b. Die Lackschicht 3a verläuft hierbei durchgehend bis zum Deckabschnitt 3c. 7 shows a variant figure 5 . Here the electrical conductor 2 has a reduced strip thickness D 1 in the area in front of its side edge surface 2c in comparison to the strip thickness D in the remaining strip area. In particular, the tape thickness reduction in the area of the cover surfaces 2a, 2b is the same and is less than/equal to the thickness DK of the film adhesive tape 3b. The lacquer layer 3a runs continuously up to the cover section 3c.

Auch kann der Fachmann weitere technische Merkmale ergänzen, ohne dass der Rahmen der Erfindung verlassen wird. So zeigt das Ausführungsbeispiel nur eine Möglichkeit der Kaschierung mit dem Folienklebeband 3b. Alternativ kann auch ein Klebestreifen 3b um die Kantenfläche 2c gelegt werden, oder die Lackschicht 3a könnte sich unter dem Folienklebeband 3b befinden.The person skilled in the art can also add further technical features without departing from the scope of the invention. So the embodiment shows only one possibility of lamination with the film adhesive tape 3b. Alternatively, an adhesive strip 3b can also be placed around the edge surface 2c, or the lacquer layer 3a could be located under the foil adhesive tape 3b.

BezugszeichenlisteReference List

11
Leitungsbandconduction band
22
Leiterdirector
2a2a
Obere DeckflächeTop Deck
2b2 B
Untere DeckflächeLower Deck
2c2c
Seitenkantenflächeside edge surface
33
Isolierunginsulation
3a3a
Lackschichtvarnish layer
3b3b
Folienklebebandfoil tape
3c3c
Deckabschnittdeck section
44
Bereicharea
55
ÜberstandGot over
BB
Breite von 4width of 4
DD
Banddicketape thickness
D1D1
Reduzierte BanddickeReduced tape thickness
DLDL
Dicke von 3athickness of 3a
DKDK
Dicke von 3bthickness of 3b
LL
Länge von 2length of 2
OO
Oberfläche von 3surface of 3

Claims (8)

  1. Electrically insulated electrical conductive strip (1), especially for electric motors and transformers, having an electrical conductor (2) in strip form that has an upper face (2a) and a lower face (2b), two lateral edge faces (2c) and one end edge face at each end, and having an electrical insulation (3) disposed on at least one of the two faces (2a, 2b) of the strip (1), wherein the insulation (3) comprises an enamel layer (3a) and an adhesive strip (3b) which consists of plastic and is bonded to the lower face (2b) and/or the upper face (2a) of the electrical conductor (2) in strip form, in each case at least in a region (4) of the lower face (2b) and/or of the upper face (2a) that directly adjoins a lateral edge face (2c),
    characterized in that the region (4) of the adhesive strip (3b) directly adjacent to a lateral edge face (2c) of the electrical conductor (2) in strip form has a width (B) in the range from 0.2 cm to 4.5 cm, wherein the enamel layer (3a) is above the adhesive strip (3b), and wherein the insulation (3) in a region of the lower face (2b) and/or of the upper face (2a) that adjoins the region to which the film adhesive tape (3b) has been applied is formed exclusively by the enamel layer (3a).
  2. Conductive strip (1) according to Claim 1, characterized in that the adhesive strip (3b) is bonded in a C shape in each case around a lateral edge face (2c) proceeding from the faces (2a, 2b).
  3. Conductive strip (1) according to Claim 1, characterized in that the adhesive strip (3b) has an excess (5) with respect to the lateral edge face (2c) of the electrical conductor (2) in strip form that preferably has a length (L) in the range of 0 cm < excess ≤ 5 cm.
  4. Conductive strip (1) according to any of Claims 1 to 3,
    characterized in that the electrical conductor (2) in strip form consists of aluminium or of an aluminium alloy and preferably has a thickness (D) in the range from 0.1 mm to 1.5 mm.
  5. Conductive strip (1) according to any of Claims 1 to 4,
    characterized in that the enamel layer (3a) has a thickness (DL) in the range from 5 µm to 50 µm.
  6. Conductive strip (1) according to any of Claims 1 to 5,
    characterized in that the adhesive strip (3b) has a thickness (DK) in the range from 3 µm to 20 µm, where this thickness (DK) is preferably at least half the thickness (DL) of the enamel layer (3a) in in the region where there is no adhesive strip (3b).
  7. Conductive strip (1) according to any of Claims 1 to 6,
    characterized in that the enamel layer (3a) is formed from an enamel based on organic polymers, as of an acrylic enamel, epoxy enamel, polyester enamel, polyamide enamel or fluoropolymer enamel, or is based on sol-gel compositions, especially from a wire enamel such as a THEIC-modified polyesterimide.
  8. Conductive strip (1) according to any of Claims 1 to 7,
    characterized in that the region (4) of the adhesive strip (3b) directly adjacent to a lateral edge face (2c) of the electrical conductor (2) in strip form has a width (B) in the range from 0.5 to 1.5 cm.
EP18715509.8A 2017-04-05 2018-03-19 Electrically insulated electrical conducting ribbon, in particular for electrical motors and transformators Active EP3607569B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017107328.0A DE102017107328A1 (en) 2017-04-05 2017-04-05 Electro-insulated electrical conductor strip, in particular for electric motors and transformers
PCT/EP2018/056831 WO2018184823A1 (en) 2017-04-05 2018-03-19 Electrically insulated electric conductor strip, in particular for electric motors and transformers

Publications (2)

Publication Number Publication Date
EP3607569A1 EP3607569A1 (en) 2020-02-12
EP3607569B1 true EP3607569B1 (en) 2022-09-07

Family

ID=61899173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18715509.8A Active EP3607569B1 (en) 2017-04-05 2018-03-19 Electrically insulated electrical conducting ribbon, in particular for electrical motors and transformators

Country Status (6)

Country Link
US (1) US10957464B2 (en)
EP (1) EP3607569B1 (en)
DE (1) DE102017107328A1 (en)
ES (1) ES2931531T3 (en)
PL (1) PL3607569T3 (en)
WO (1) WO2018184823A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202018105660U1 (en) * 2018-10-02 2020-01-07 Alanod Gmbh & Co. Kg Electro-insulated electrical conduction tape, especially for electric motors and transformers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB900519A (en) * 1957-07-08 1962-07-04 Eisler Paul Electric conductor strips
CN101894620A (en) * 2010-07-28 2010-11-24 江苏豪威富电气股份有限公司 Self-adhesive mica tape lapped wire with structure improvement
EP3109873A1 (en) * 2014-02-17 2016-12-28 Eaton Corporation Inductor coil and electromagnetic component

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1765866A1 (en) 1968-07-30 1971-10-28 Felten & Guilleaume Carlswerk Insulated electrical strip conductor, in particular enamel-insulated strip conductor
FR2474397A1 (en) * 1979-12-13 1981-07-31 Magna Ply Cy Insulative spiral wrapping for elongate conductor - has length of adhesive tape wrapped round core with sticky side out and length of non-sticky tape wound over it
US5281488A (en) * 1992-09-15 1994-01-25 Poulsen Peder Ulrik Foil strip conductor
AU2002364343A1 (en) * 2001-12-29 2003-07-30 Technip France Heated windable rigid duct for transporting fluids, particularly hydrocarbons
JP4475470B2 (en) * 2007-04-05 2010-06-09 三菱電機株式会社 Insulation structure of coil part of rotating electrical machine
JP5892337B2 (en) * 2012-11-01 2016-03-23 株式会社オートネットワーク技術研究所 Reactor, converter, and power converter
WO2015130692A2 (en) * 2014-02-25 2015-09-03 Essex Group, Inc. Insulated winding wire containing semi-conductive layers
JP2016103398A (en) * 2014-11-28 2016-06-02 住友電気工業株式会社 Shield cable
DE102014119720A1 (en) * 2014-12-30 2016-06-30 Lisa Dräxlmaier GmbH Insulated flat conductor and flat conductor composite

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB900519A (en) * 1957-07-08 1962-07-04 Eisler Paul Electric conductor strips
CN101894620A (en) * 2010-07-28 2010-11-24 江苏豪威富电气股份有限公司 Self-adhesive mica tape lapped wire with structure improvement
EP3109873A1 (en) * 2014-02-17 2016-12-28 Eaton Corporation Inductor coil and electromagnetic component

Also Published As

Publication number Publication date
US20200118707A1 (en) 2020-04-16
PL3607569T3 (en) 2023-02-20
WO2018184823A1 (en) 2018-10-11
US10957464B2 (en) 2021-03-23
ES2931531T3 (en) 2022-12-30
DE102017107328A1 (en) 2018-10-11
EP3607569A1 (en) 2020-02-12

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