EP2394280B1 - Bobines secondaires pour bobines d'allumage et leur procédé de production - Google Patents

Bobines secondaires pour bobines d'allumage et leur procédé de production Download PDF

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Publication number
EP2394280B1
EP2394280B1 EP10706561.7A EP10706561A EP2394280B1 EP 2394280 B1 EP2394280 B1 EP 2394280B1 EP 10706561 A EP10706561 A EP 10706561A EP 2394280 B1 EP2394280 B1 EP 2394280B1
Authority
EP
European Patent Office
Prior art keywords
lacquer layer
wire
winding
secondary coil
coil
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.)
Not-in-force
Application number
EP10706561.7A
Other languages
German (de)
English (en)
Other versions
EP2394280A1 (fr
Inventor
Oliver Schildbach
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.)
Elektrisola GmbH&Co KG
Original Assignee
Elektrisola GmbH&Co KG
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 Elektrisola GmbH&Co KG filed Critical Elektrisola GmbH&Co KG
Publication of EP2394280A1 publication Critical patent/EP2394280A1/fr
Application granted granted Critical
Publication of EP2394280B1 publication Critical patent/EP2394280B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • 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
    • H01F27/2823—Wires
    • 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
    • H01F41/04—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 for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/082—Devices for guiding or positioning the winding material on the former
    • H01F41/086—Devices for guiding or positioning the winding material on the former in a special configuration on the former, e.g. orthocyclic coils or open mesh coils
    • 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
    • H01F27/2823—Wires
    • H01F2027/2842—Wire coils wound in conical zigzag to reduce voltage between winding turns

Definitions

  • the invention relates to a method for producing secondary coils for ignition coils according to the preamble of claim 1.
  • Secondary coils are used in ignition coils.
  • Ignition coils also have a coil core made of magnetic material and a primary coil.
  • a wire is wound on a winding mandrel, so that the wire is formed into several turns.
  • the secondary coil has many more turns than the primary coil.
  • the primary coil is connected to a low voltage source.
  • the secondary coil is connected to the high voltage power supply for a spark plug.
  • a high voltage is induced in the secondary coil circuit by interrupting the current flow in the primary coil circuit.
  • an ignition coil is known for internal combustion engines, which have a primary and a secondary coil, each made of a baked enamel wire.
  • the prior art has the problem that corona discharges can occur if the voltage difference between two adjacent windings in air is too high.
  • the secondary coils are often poured with resin, Care must be taken that no air bubbles are trapped during casting. This is a very expensive and expensive process.
  • the secondary coil is subdivided in the longitudinal direction into a plurality of chambers, for example by means of disks arranged concentrically around the longitudinal axis of the coil. The manufacturing process is also complicated and expensive.
  • the invention is therefore an object of the invention to provide secondary coils and a method for producing secondary coils, which is simple and inexpensive and can be produced in the secondary coils according to the invention, in which the risk of corona discharge is reduced.
  • the winding of the wire coated with at least one lacquer layer takes place in the form of a truncated cone at an angle of at least 20 ° with respect to the longitudinal axis of the winding mandrel and the gluing of the adjacent turns of the wire takes place during the winding.
  • the method has the advantage that the wire is wound at an angle of at least 20 ° with respect to the longitudinal axis of the winding mandrel.
  • the voltage difference of adjacent one another Windings of the present invention are below the corona discharge voltage.
  • the adjacent turns are glued together during winding. This also means that the turns can not slip off. This also leads to the fact that it can not come to corona discharges that usually occur when slipping of the windings.
  • the dissolving of the lacquer layer can be triggered by heating the lacquer layer by means of a heating device.
  • the dissolution of the lacquer layer can also be triggered by applying a solvent to the lacquer layer.
  • the bonding of the adjacent turns has the advantage that the coil consisting of the turns is self-supporting.
  • a baked enamel layer can be used. If a baked enamel layer and a large winding angle (preferably greater than 20 °) is used, adhesive tapes, potting compound or impregnation within the secondary winding can be dispensed with.
  • the wire to be wound can also be coated with two layers of lacquer, wherein a baked enamel layer can be used as the outer lacquer layer.
  • the winding mandrel can be removed after winding from the secondary coil.
  • the secondary coil is often wound directly on a secondary coil core and thus on no mandrel and then installed with the secondary coil core in the ignition coil.
  • no secondary coil core is used. This has the advantage that material can be saved by the fact that the winding core is removed and no secondary coil core is used.
  • an ignition coil using a secondary coil without a secondary coil core is more compact than an ignition coil using a secondary coil containing a secondary coil core.
  • the secondary coil can be encapsulated after removal of the winding mandrel with plastic.
  • the overmolded plastic represents an electrical insulation to the outside for the secondary coil.
  • Plastic encapsulation is a simple, inexpensive and time-saving method.
  • needs Care should be taken not to trap air bubbles when pouring resin. Even with the inclusion of air bubbles, corona discharge does not occur in the present invention.
  • the secondary coil but also the other components located inside the ignition coil, such as the primary coil and the primary coil core can be overmoulded with plastic. In this way, the components within the ignition coil form a solid unit.
  • a secondary coil for ignition coils having a longitudinal axis, a wound around the longitudinal axis of the wire, it is provided that the wound wire is wound at an angle of at least 20 ° with respect to the longitudinal axis, wherein the wire at least one at least during winding partially dissolvable lacquer layer.
  • the coiled wire may also be wound at an angle of at least 25 ° with respect to the longitudinal axis.
  • the lacquer layer may be a baked enamel layer, wherein the enamel layer may consist of polyvinyl butyral, polyamide or epoxy resin.
  • the dissolved lacquer layer is stickable.
  • a heating device can dissolve the lacquer layer.
  • a device may apply a solvent to the wire coated with a lacquer layer which will dissolve the lacquer layer.
  • the wire to be wound may also be coated with two or more lacquer layers, wherein the outer lacquer layer may be a baked enamel layer.
  • the Sekuhdärspule has no secondary coil core. After winding, the winding mandrel on which the secondary coil has been wound up is removed from the secondary coil.
  • the secondary coil without secondary coil core can be extrusion-coated with plastic. Not only the secondary coil but also the other components, which are arranged inside the ignition coil, can be injection molded with plastic.
  • FIG. 1 schematically shows a partial section of a pencil ignition coil 3.
  • a pencil ignition coil 3 can be used for example in an ignition system of a gasoline engine.
  • a high voltage is induced in the secondary circuit by interrupting the current flow in the primary circuit. This high voltage is passed in an ignition system of a gasoline engine to the spark gap of a spark plug to ignite the fuel-air mixture in the cylinders of the gasoline engine.
  • the pencil ignition coil 3 has an upper part 5, in which the control electronics are arranged.
  • the control electronics is connected via a plug 7 with a supply voltage.
  • the pencil ignition coil 3 preferably consists of a cylindrical core 2.
  • the cylindrical core 2 is preferably made of magnetizable material.
  • Concentrically around the cylindrical core 2 around a secondary coil 1 is arranged.
  • the longitudinal axis 13 of the secondary coil 1 is identical to the longitudinal axis 15 of the cylindrical core 2.
  • Concentrically around the secondary coil 1 around a primary coil 6 is arranged.
  • the primary coil 6 is on a primary coil core. 8 wound.
  • the primary coil 6 may alternatively be wound directly onto a secondary coil 1 overmoulded with plastic instead of a primary coil core 8.
  • the primary coil 6 in turn is concentrically surrounded by the housing 10 of the pencil ignition coil.
  • the primary coil 6 may be arranged concentrically around the cylindrical core 2.
  • the secondary coil 1 is then arranged concentrically around the primary coil 6.
  • the primary coil 6 is connected via the control electronics and the plug 7 to the supply voltage, which is a low-voltage source. By means of the control electronics, the current flow in the primary coil 6 is interrupted in order to induce a high voltage in the secondary coil 1. The secondary coil 1 forwards the induced high voltage to a spark plug via the terminal 9.
  • the secondary coil 1 and the primary coil 6 with the primary coil core 8 are overmolded with a plastic 32, whereby the secondary coil 1 and the primary coil 6 are electrically insulated toward the outside. Likewise, the secondary coil 1 is electrically insulated from the cylindrical core 2. In addition, the gap between the secondary coil 1 and the primary coil core 8 is filled with the plastic 32, so that the secondary coil 1 is electrically insulated from the primary coil 6. In addition, the cylindrical core 2 and other components, not shown, of the pencil ignition coil 3, as the electrical contacts, with the plastic 32 are encapsulated.
  • FIG. 2 shows a winding mandrel 20, on which a coated with at least one lacquer layer 26 wire 18 is wound.
  • the coated wire 18 is progressively wound onto the winding mandrel 20. That is, the wire 18 is wound at an angle a with respect to the longitudinal axis 12 of the winding mandrel 20 (or with respect to the longitudinal axis 13 of the secondary coil 1). That is, the wire is wound up in a frusto-conical shape.
  • a leg of the angle a runs along the longitudinal axis 12 of the winding mandrel 20.
  • the coated wire 18 is thus wound along the line 11 in winding planes 17, 17a, 17b which extend at an angle a with respect to the longitudinal axis 12 of the angular mandrel 20.
  • the angle a is at least 20, preferably at least 25 degrees. This has the advantage that no corona discharge in the secondary coil 1, if it is installed for example in an ignition coil, can occur.
  • the voltage difference each other adjacent turns is due to the winding at an angle of at least 25 ° below the corona discharge voltage.
  • FIG. 2 is a heater 14 can be seen.
  • the wire 18 coated with a lacquer layer 26 is heated by the heater 14. It is both the already wound wire 18, the so-called winding package, as well as the supplied wire 18 is heated.
  • the outer lacquer layer 26 of the coated wire 18 at least partially dissolves.
  • a device can output a solvent, whereby the outer lacquer layer 26 of the coated wire 18 at least partially dissolves.
  • the outer lacquer layer 26 may be a baked enamel layer.
  • the lacquer layer 26 is adhesively bonded by the dissolution, whereby the adjacent turns of the coated wire 18 are glued together during the winding. This has the advantage that the wire can not slip and thus can not come to a winding collapse during winding.
  • the bonds 19 of the adjacent turns of the wire 18 can be seen, which are caused by dissolving and bonding the lacquer layer 26.
  • the baked enamel layer When the baked enamel layer is dissolved, it is preferably not completely dissolved before curing takes place.
  • FIG. 2 shows a cross section of the wire 18 coated with at least one lacquer layer 26.
  • the wire 18 may be made of copper and / or aluminum and / or brass and / or silver and / or nickel.
  • the wire 18 is coated with a base lacquer layer 24. On this base lacquer layer 24, a further lacquer layer 26 is applied.
  • the outer lacquer layer 26 may consist of baked enamel. The baked enamel can dissolve between a temperature of 140 and 300 degrees and thereby become stickable.
  • FIG. 4 a feeder 28 is shown, which supplies the wire 18 coated with at least one lacquer layer.
  • This coated wire 18 is wound on the winding mandrel 20. This happens because the winding mandrel 20 rotates about its longitudinal axis 12 in the direction of rotation A. Alternatively, the coated wire 18 may also be wound around the non-rotating winding mandrel 20 become.
  • winding is intended to include both possibilities.
  • the heater 14 which is preferably an air blower, inflates the coated wire with heat, with the outer lacquer layer 26 of the coated wire 18 at least partially dissolving and becoming tacky.
  • the adjacent turns of the coated wire 18 are thus glued together.
  • a device that outputs a solvent during winding onto the wire 18 may also be used. This solvent may also cause the outer lacquer layer of the wire 18 to at least partially dissolve and thereby become tacky. After the individual turns have been glued together, the at least partially dissolved paint cures again.
  • Fig. 5 is a partial view of a cut secondary coil 1 without winding mandrel 20 and a concentrically arranged around these primary coil 6 is shown with a primary coil core 8. Inside the secondary coil 1, a cylindrical core 2 is arranged. The partial view is both on the in Fig. 5 shown left and cut off on the right side. Since the turns of the secondary coil 1 stick together, the turns of the secondary coil 1 can no longer slip.
  • the secondary coil 1 is self-supporting and therefore forms a solid unit.
  • the cylindrical core 2, the wound secondary coil 1 and the concentrically arranged around this primary coil 6 with primary coil core 8 is overmolded with a plastic 32.
  • other not shown components of an ignition coil 3, such as the electrical contacts, with the plastic 32 can be encapsulated.
  • the plastic 32 also forms a sufficient insulation of the secondary coil 1 relative to the core 2 of the ignition coil 3 and / or to the primary coil 6 of the ignition coil 3. In this way, the usual Harzverguss the secondary coil 1 can be avoided in ignition coils according to the prior art, most of the time Coil core is poured with.
  • Plastic overmolding is a very simple, time-saving and cost-effective process

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Claims (6)

  1. Procédé de fabrication d'une bobine secondaire (1) destinée à des bobines d'allumage (3) par
    - un processus d'enroulement d'un fil (18), recouvert d'au moins une couche de vernis (26), sur un mandrin d'enroulement (20) comportant un axe longitudinal (12),
    - un processus de collage d'enroulements adjacents de fils (18) réalisé par dissolution et durcissement de l'au moins une couche de vernis (26), une couche de vernis à cuire étant utilisée comme couche de vernis (26),
    caractérisé en ce que
    le processus d'enroulement du fil recouvert d'au moins une couche de vernis est effectué suivant un cône tronqué avec un angle d'au moins 20° par rapport à l'axe longitudinal du mandrin d'enroulement et le collage des enroulements adjacents du fil (18) est effectué pendant l'enroulement.
  2. Procédé selon la revendication 1, caractérisé en ce que le fil (18), recouvert d'au moins une couche de vernis (26), est enroulé sur le mandrin d'enroulement (20) suivant un cône tronqué avec un angle d'au moins 25° par rapport à l'axe longitudinal (12) du mandrin d'enroulement (20).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le processus de dissolution de la couche de vernis (26) est déclenché par chauffage de la couche de vernis (26) au moyen d'un dispositif de chauffage (14).
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que le processus de dissolution de la couche de vernis (26) est déclenché par application d'un solvant sur la couche de vernis.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la bobine secondaire (1) est enrobée de matière synthétique (32) une fois que le mandrin d'enroulement (20) a été éloigné.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que la couche de vernis à cuire est constituée de polyvinyle butyral ou de polyamide ou de résine époxy.
EP10706561.7A 2009-02-04 2010-02-04 Bobines secondaires pour bobines d'allumage et leur procédé de production Not-in-force EP2394280B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009007396A DE102009007396A1 (de) 2009-02-04 2009-02-04 Sekundärspulen für Zündspulen und deren Herstellungsverfahren
PCT/EP2010/051358 WO2010089348A1 (fr) 2009-02-04 2010-02-04 Bobines secondaires pour bobines d'allumage et son procédé de production

Publications (2)

Publication Number Publication Date
EP2394280A1 EP2394280A1 (fr) 2011-12-14
EP2394280B1 true EP2394280B1 (fr) 2014-04-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10706561.7A Not-in-force EP2394280B1 (fr) 2009-02-04 2010-02-04 Bobines secondaires pour bobines d'allumage et leur procédé de production

Country Status (3)

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EP (1) EP2394280B1 (fr)
DE (1) DE102009007396A1 (fr)
WO (1) WO2010089348A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011080697A1 (de) 2011-08-09 2013-02-14 Robert Bosch Gmbh Spule für eine Zündspulenanordnung
DE102012017615B4 (de) * 2012-09-06 2021-12-02 Brüel & Kjaer Vibro GmbH Wirbelstromaufnehmer und Verfahren zur Wegmessung
RU2547808C2 (ru) * 2013-07-24 2015-04-10 Открытое акционерное общество "ОКБ-Планета" ОАО "ОКБ-Планета" Катушка индуктивности

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6529111B1 (en) * 1999-08-31 2003-03-04 Honda Giken Kogyo Kabushiki Kaisha Ignition coil

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB501830A (en) * 1936-05-27 1939-03-02 Jakob Bohli High tension field coil
CH196451A (de) * 1936-05-27 1938-03-15 Jakob Bohli Hochspannungsspule.
CH530704A (de) * 1968-04-19 1972-11-15 Meteor Ag Drahtwickelmaschine
US3745138A (en) * 1968-08-14 1973-07-10 Phelps Dodge Magnet Wire Corp Bonding composition containing a blocked isocyanate
JP2827236B2 (ja) * 1988-11-24 1998-11-25 住友電気工業株式会社 自己融着性絶縁電線及びそのコイル
US5237165A (en) * 1991-04-05 1993-08-17 Tingley Iii Loyal H Multi-turn coil structures and methods of winding same
DE69706494T2 (de) * 1996-08-31 2002-04-18 Toyo Denso Kk Zündspulenvorrichtung für Brennkraftmaschine
KR100815890B1 (ko) * 2001-03-31 2008-03-24 엘지.필립스 엘시디 주식회사 코일 권선방법과 이를 이용하여 코일이 권선된 트랜스포머및 액정표시장치의 인버터
US20030106956A1 (en) * 2001-12-10 2003-06-12 Moga Viorel N. System and method for winding an ignition coil
DE202006007619U1 (de) * 2006-05-11 2007-09-13 Dr. Fritz Faulhaber Gmbh & Co. Kg Glockenankerspule

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6529111B1 (en) * 1999-08-31 2003-03-04 Honda Giken Kogyo Kabushiki Kaisha Ignition coil

Also Published As

Publication number Publication date
EP2394280A1 (fr) 2011-12-14
DE102009007396A1 (de) 2010-08-05
WO2010089348A1 (fr) 2010-08-12

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