EP0515958B1 - Starter haute-tension pour amorcer et alimenter en courant alternatif des lampes à décharge haute-pression sur des véhicules - Google Patents

Starter haute-tension pour amorcer et alimenter en courant alternatif des lampes à décharge haute-pression sur des véhicules Download PDF

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Publication number
EP0515958B1
EP0515958B1 EP92108468A EP92108468A EP0515958B1 EP 0515958 B1 EP0515958 B1 EP 0515958B1 EP 92108468 A EP92108468 A EP 92108468A EP 92108468 A EP92108468 A EP 92108468A EP 0515958 B1 EP0515958 B1 EP 0515958B1
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EP
European Patent Office
Prior art keywords
core
activating
secondary winding
transformer according
winding
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.)
Expired - Lifetime
Application number
EP92108468A
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German (de)
English (en)
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EP0515958A1 (fr
Inventor
Friedrich-Karl Wendt
Wolfgang Daub
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.)
Hella GmbH and Co KGaA
Original Assignee
Hella KGaA Huek and Co
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Publication of EP0515958A1 publication Critical patent/EP0515958A1/fr
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Anticipated expiration legal-status Critical
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    • 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
    • H01F38/08—High-leakage transformers or inductances
    • H01F38/10—Ballasts, e.g. for discharge lamps
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/042—Starting switches using semiconductor devices

Definitions

  • High-voltage ignition transformer for igniting and operating AC high-pressure gas discharge lamps in motor vehicles
  • the invention relates to a high-voltage ignition transformer for igniting and operating AC high-pressure gas discharge lamps in motor vehicles according to the features of the preamble of claim 1.
  • a high-voltage ignition transformer for igniting and operating high-pressure gas discharge lamps is known, the primary winding and the secondary winding of which are wound from a film.
  • the material of the core of the high-voltage ignition transmitter consists of air.
  • the exemplary embodiment shown relates to a high-pressure gas discharge lamp for use in the home, the high-pressure gas discharge lamp having a socket for screwing into commercially available lamps.
  • the turns of the high voltage ignition transformer are wound on the end part of the glass bulb of the lamp.
  • Such a high-voltage ignition transformer is not suitable for use in motor vehicles because, on the one hand, the high-pressure gas discharge lamps used in the home and in the motor vehicle area differ and, on the other hand, the dimensions in the achievable efficiency using an air core and the required dielectric strength in the previously known embodiment are too large for an application in the motor vehicle.
  • Such a high-voltage ignition transformer is known from international patent application WO-A-90 10 154, the core of which is also designed as an elongated core which consists of a ferrite material.
  • This high-voltage ignition transformer is specially designed for the generation of periodic ignition pulses for the ignition of spark plugs in motor vehicles. Accordingly, this high-voltage ignition transformer has a primary winding consisting of two windings, consisting of interwoven foils, for the integration of a capacitance.
  • Such a high-voltage ignition transformer is not suitable for igniting and operating AC high-pressure gas discharge lamps in motor vehicles, since the stable burning state of a high-pressure gas discharge lamp cannot be achieved with such a transformer or can only be achieved with very poor efficiency.
  • a high-voltage ignition transformer for igniting and operating gas discharge lamps is known from US Pat. No. 4,527,098, in which the secondary winding is designed using conventional winding technology and is applied to an annular ferrite core.
  • the primary winding is formed by components that are arranged on the circuit board that also carries the annular core.
  • the ignition voltages to be generated are of the order of 2 to 3 kV.
  • EP-A-0 321 416 an ignition transformer for the periodic supply of spark plugs with ignition pulses is also known, which has a conventional design.
  • the invention is therefore based on the object of creating a high-voltage ignition transformer for AC high-pressure gas discharge lamps in motor vehicles, which has a current-independent secondary inductance, which has the smallest possible dimensions and which has a simple and inexpensive, high-voltage-compatible winding structure with the highest possible efficiency.
  • the core is designed as an elongated core, because thus the secondary inductance of the high-voltage ignition transformer can be dimensioned in a simple and inexpensive manner due to the large shear of the ferrite core almost independent of current and thus irregularities in the operating current, the z. B. complicate the control of a constant light output, and sudden changes in the large starting currents can be safely and reliably avoided because the core can not go into saturation.
  • the high-voltage ignition transformer can have the smallest possible dimensions and a breakdown-proof high-voltage-compatible winding structure is achieved with the highest possible efficiency.
  • the stretched core consists of a soft magnetic ferrite material, whereby the dimensions can be particularly small, and the highest possible efficiency for the high-voltage ignition transformer can be achieved with a high-voltage-compatible winding structure.
  • the core has a cross-sectional area and the secondary winding has a number of turns in which the core is unsaturated in all operating conditions.
  • the core consists of a high-resistance soft magnetic ferrite material results in the advantage that the eddy current losses in the ferrite core can be kept as small as possible.
  • the primary winding is wound on the secondary winding, because this completely encloses the secondary winding and thus results in the best possible magnetic coupling of the primary winding with the secondary winding, which has a high efficiency and secondly the advantage that the lower potential is present when the high-voltage ignition transmitter is operated on the outside of the high-voltage ignition transmitter, which results in simplified, better insulation and thus greater security against flashovers.
  • the primary winding and the secondary winding each have one turn per layer of the film, because thus the very high winding voltage is at the same time the layer voltage that is insulated by the insulating film and the Primary winding is automatically evenly distributed over the entire winding width, even with a minimum number of turns, so that there is an optimal coupling between the primary winding and the secondary winding and, in addition, partial saturations of the ferrite core are avoided.
  • the insulating film arranged between the individual layers of the primary winding and the secondary winding is wider than the film of the primary winding and the secondary winding, because this results in a particularly high security against flashovers with a simple and inexpensive construction.
  • a bobbin made of insulating material is arranged between the secondary winding and the core, because the direct winding onto the core is complex and difficult.
  • the core is a rod core, which results in a particularly simple and inexpensive embodiment in which there is no saturation of the soft magnetic ferrite core.
  • the core has the shoulders supporting the windings has the advantage that the field lines do not emerge as far from the end regions of the stretched soft-magnetic ferrite core as in the case of a stretched core which does not have such shoulders, which causes eddy current losses in adjacent metal parts, such as B. a housing can be reduced.
  • the core, the bobbin, the primary winding and the secondary winding are cast in an insulating casting compound, because the risk of flashovers is thus reduced to a minimum and the safety and the service life are increased.
  • the high-voltage ignition transformer is a particularly compact, high-voltage resistant, easy to assemble component.
  • Figure 1 shows a longitudinal section through a high-voltage ignition transformer according to the invention.
  • the stretched core (K) made of soft magnetic ferrite material, which is designed here, for example, as a rod core, is surrounded by a coil former (U), which consists of insulating material.
  • the secondary winding (S) of the high-voltage ignition transformer which consists of a conductive film (F) and an insulating film (I), is wound onto the coil former (U).
  • the primary winding (P), which also consists of a conductive film (F) and an insulating film (I), is wound onto the secondary winding (S).
  • the primary winding (P) and the secondary winding (S) are connected here by way of example to electrical connection elements (A) for the electrical connection.
  • the contacting of the electrically conductive film (F) with the electrical connection elements (A) is not shown here and can, for. B. made in the foils or welded to these connections.
  • the core (K), the coil former (U), the primary winding (P) and the secondary winding (S) are cast here in an insulating potting compound (V) as an example to improve the flashover resistance.
  • the core (K), the coil former (U), the primary winding (P) and the secondary winding (S) are arranged here by way of example in a housing (G) and potted with this.
  • the high-voltage ignition transformer can also be cast in an insulating casting compound (V) with other components of an ignition device of a high-pressure gas discharge lamp.
  • FIG. 2 shows a cross section through a high-voltage ignition transformer according to the invention.
  • the high-voltage ignition transformer here consists, for example, of a core (K), a coil former (U), a primary winding (P) and a secondary winding (S) using film technology, which with their electrical connection elements (A), Two of which are shown here by way of example, are cast in an enclosure (G) by means of an insulating casting compound (V).
  • the embodiment shown in Figure 1 and Figure 2 has particularly small dimensions and is particularly high voltage resistant with a simple and inexpensive design.
  • the length of the housing is, for example, about 2 to 3 cm and the width and height of the housing is, for example, about 1 to 2 cm. In other exemplary embodiments, these dimensions can also be larger or smaller.
  • the secondary winding (S) applied to the inside of the coil former (U) has, for example, about 100 turns and has the primary winding (P) applied to the secondary winding (S), for example, about 4 turns.
  • FIG. 3 shows the detail (H) corresponding to Figure 1.
  • the core (K) consists of a soft magnetic ferrite material. In order to keep eddy current losses as low as possible, a material is used that is as high-resistance as possible.
  • the coil former (U) surrounds the core (K) in such a way that the core (K) and the coil former (U) lie firmly against one another.
  • the secondary winding (S) is firmly wound on the bobbin (U).
  • the primary winding (P), which is not shown in FIG. 3, is firmly wound onto the secondary winding (S).
  • the core (K) can have the windings (P, S) which support the shoulders Do not allow field lines to emerge at the free ends of the core (K) as far as with a straight core (K) without such shoulders.
  • a particularly favorable embodiment of the core (K) results when using a roller core. Designs of this type are not shown in the figures.
  • Figure 4 shows the winding structure of both the primary winding (P) and the secondary winding (S).
  • Each layer of the primary winding (P) and the secondary winding (S) consists of an electrically conductive film (F) which is insulated from the other layers by an insulating film (I).
  • the width of the film (F) here is, for example, approximately 2/3 of the width of the insulating film (I) in order to avoid rollovers with great reliability.
  • the width of the insulating film corresponds to the length of the cylindrical core (K) in order to avoid rollovers as best as possible.
  • the insulating film (I) consists here, for example, of a plastic material and has, for example, a thickness of approximately 15 »m.
  • the film (F), from which the primary winding (P) and the secondary winding (S) are made, can consist of copper or aluminum, for example, and can have a thickness of approximately 10 »m, for example. Depending on the application and the requirements, these dimensions can be larger or smaller.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Coils Of Transformers For General Uses (AREA)

Claims (13)

  1. Transformateur haute tension d'allumage pour allumer et faire fonctionnder des lampes à décharge (électrique dans un gaz) haute pression à courant alternatif dans des véhicules automobiles, comprenant un noyau (K) réalisé comme un noyau de forme droite ou allongée et fait d'un matériau ferritique, un enroulement primaire (P) entourant le noyau (K) et fait d'une feuille mince (F), ainsi qu'un enroulement secondaire (S) entourant le noyau (K) et fait d'une feuille mince (F), avec disposition d'une feuille mince isolante (I) entre les différentes couches de l'enroulement primaire (P) et de l'enroulement secondaire (S), caractérisé en ce que le noyau (K) est fait d'un matériau ferritique doux et que le noyau (K) possède une aire de section droite telle et l'enroulement secondaire (S) comporte un nombre de spires tel que, sous toutes les conditions de fonctionnement, le noyau (K) n'est pas saturé, la tension d'allumage nécessaire à la lampe à décharge haute pression à courant alternatif étant produite à partir de seulement quelques centaines de volts.
  2. Transformateur d'allumage selon la revendication 1, caractérisé en ce que le noyau (K) est fait d'un matériau ferritique doux à haute résistance ohmique.
  3. Transformateur d'allumage selon la revendication 1 ou 2, caractérisé en ce que l'enroulement primaire (P) est bobiné par-dessus l'enroulement secondaire (S).
  4. Transformateur d'allumage selon la revendication 3, caractérisé en ce que l'enroulement primaire (P) et l'enroulement secondaire (S) comportent chacun une spire par couche de la feuille.
  5. Transformateur d'allumage selon la revendication 4, caractérisé en ce que la feuille isolante (I) placée entre les différentes couches de l'enroulement primaire (P) et de l'enroulement secondaire (S) est plus large que la feuille (F) d'où sont formés les enroulements primaire (P) et secondaire (S).
  6. Transformateur d'allumage selon la revendication 5, caractérisé en ce qu'une carcasse de bobine (U) en matériau isolant est placée entre l'enroulement secondaire (S) et le noyau (K).
  7. Transformateur d'allumage selon la revendication 6, caractérisé en ce que le noyau (K) est un noyau en bâton.
  8. Transformateur d'allumage selon la revendication 7, caractérisé en ce que le noyau (K) présente des épaulements formant des appuis pour les enroulements (P, S).
  9. Transformateur d'allumage selon la revendication 8, caractérisé en ce que le noyau (K) est réalisé en forme de cylindre.
  10. Transformateur d'allumage selon la revendication 9, caractérisé en ce que le noyau (K) est un noyau en rouleau.
  11. Transformateur d'allumage selon au moins une des revendications précédentes, caractérisé en ce que le noyau (K), la carcasse (U), l'enroulement primaire (P) et l'enroulement secondaire (S) sont scellés dans une masse de scellement isolante (V).
  12. Transformateur d'allumage selon la revendication 11, caractérisé en ce que le noyau (K), la carcasse (U), l'enroulement primaire (P) et l'enroulement secondaire (S) sont placés dans un boîtier (G) et scellés avec celui-ci.
  13. Transformateur d'allumage selon au moins une des revendications précédentes, caractérisé en ce que la tension d'allumage nécessaire à la lampe à décharge haute pression à courant alternatif est de l'ordre de 20 kV.
EP92108468A 1991-05-27 1992-05-20 Starter haute-tension pour amorcer et alimenter en courant alternatif des lampes à décharge haute-pression sur des véhicules Expired - Lifetime EP0515958B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4117288 1991-05-27
DE4117288A DE4117288A1 (de) 1991-05-27 1991-05-27 Hochspannungs-zuenduebertrager zum zuenden und betreiben von wechselstrom-hochdruck-gasentladungslampen in kraftfahrzeugen

Publications (2)

Publication Number Publication Date
EP0515958A1 EP0515958A1 (fr) 1992-12-02
EP0515958B1 true EP0515958B1 (fr) 1995-03-15

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EP92108468A Expired - Lifetime EP0515958B1 (fr) 1991-05-27 1992-05-20 Starter haute-tension pour amorcer et alimenter en courant alternatif des lampes à décharge haute-pression sur des véhicules

Country Status (3)

Country Link
EP (1) EP0515958B1 (fr)
DE (2) DE4117288A1 (fr)
ES (1) ES2070551T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7760061B2 (en) 2006-08-31 2010-07-20 General Electric Company Lamp transformer
US7855625B2 (en) 2006-08-31 2010-12-21 General Electric Company Lamp transformer

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4333886A1 (de) * 1993-10-05 1995-04-06 Hella Kg Hueck & Co Zündtransformator für eine Gasentladungslampe
DE4423275A1 (de) * 1994-07-05 1996-01-11 Bosch Gmbh Robert Zündvorrichtung für Gasentladungslampen, insbesondere für Kraftfahrzeugleuchten
CN1227041A (zh) * 1997-05-21 1999-08-25 电灯专利信托有限公司 放电灯的引燃装置和放电灯的引燃方法
SE9702217L (sv) * 1997-06-10 1998-12-11 Ultralux Ab Tändtransformator för gasurladdningslampor
DE19803856A1 (de) * 1998-01-31 1999-08-05 Hella Kg Hueck & Co Zündtransformator
FR2795281B1 (fr) * 1999-06-21 2001-08-17 Valeo Vision Perfectionnements aux modules d'amorcage de lampes a decharge de projecteurs de vehicule automobile
DE10317945A1 (de) * 2002-04-19 2003-11-20 Tyco Electronics France Sas Po Impulstransformator für eine Hochintensitätsentladungslampe und Verfahren zum Herstellen von diesem
DE20312503U1 (de) 2003-08-11 2003-12-24 Niggemeyer, Gert Günther, Ing.(grad.) Stabförmiger Zündübertrager
DE102004044368A1 (de) 2004-09-10 2006-03-16 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Transformator und Zündvorrichtung mit einem Transformator sowie Hochdruckentladungslampe mit einem Transformator
ES2382447T3 (es) 2006-01-20 2012-06-08 SUMIDA Components & Modules GmbH Transformador de encendido y módulo de enecendido para una lámpara de descarga de gas

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EP0321416A1 (fr) * 1987-12-17 1989-06-21 INDUSTRIE MAGNETI MARELLI S.r.l. Bobine d'allumage
WO1990010154A1 (fr) * 1989-02-21 1990-09-07 Ducati Energia S.P.A. Procede et dispositif augmentateur de haute tension pour moteurs a combustion interne

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Publication number Priority date Publication date Assignee Title
EP0321416A1 (fr) * 1987-12-17 1989-06-21 INDUSTRIE MAGNETI MARELLI S.r.l. Bobine d'allumage
WO1990010154A1 (fr) * 1989-02-21 1990-09-07 Ducati Energia S.P.A. Procede et dispositif augmentateur de haute tension pour moteurs a combustion interne

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7760061B2 (en) 2006-08-31 2010-07-20 General Electric Company Lamp transformer
US7855625B2 (en) 2006-08-31 2010-12-21 General Electric Company Lamp transformer

Also Published As

Publication number Publication date
ES2070551T3 (es) 1995-06-01
DE59201632D1 (de) 1995-04-20
EP0515958A1 (fr) 1992-12-02
DE4117288A1 (de) 1992-12-03

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