EP2226817A2 - Ignition transformer for a high pressure gas discharge lamp - Google Patents

Ignition transformer for a high pressure gas discharge lamp Download PDF

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Publication number
EP2226817A2
EP2226817A2 EP10155112A EP10155112A EP2226817A2 EP 2226817 A2 EP2226817 A2 EP 2226817A2 EP 10155112 A EP10155112 A EP 10155112A EP 10155112 A EP10155112 A EP 10155112A EP 2226817 A2 EP2226817 A2 EP 2226817A2
Authority
EP
European Patent Office
Prior art keywords
housing
ignition transformer
transformer according
elevations
core
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
EP10155112A
Other languages
German (de)
French (fr)
Other versions
EP2226817A3 (en
EP2226817B1 (en
Inventor
Frank Bewermeyer
Wolfgang Daub
Volker Puke
Gideon Kanne
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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Filing date
Publication date
Application filed by Hella KGaA Huek and Co filed Critical Hella KGaA Huek and Co
Publication of EP2226817A2 publication Critical patent/EP2226817A2/en
Publication of EP2226817A3 publication Critical patent/EP2226817A3/en
Application granted granted Critical
Publication of EP2226817B1 publication Critical patent/EP2226817B1/en
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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/326—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures specifically adapted for discharge lamp ballasts
    • 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
    • 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
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • 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
    • 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
    • H01F27/2866—Combination of wires and sheets

Definitions

  • the invention relates to an ignition transformer for a high-pressure gas discharge lamp according to the preamble of claim 1.
  • high-pressure gas discharge lamps such as e.g. Xenon lamps used. These lamps require for starting a high ignition voltage of several kV, which is generated as a voltage pulse in an ignitor.
  • ignitors include a ignitor housing in which an ignition transformer and a printed circuit board are mounted with electrical / electronic components. The ignitor is usually preceded by a ballast.
  • Such ignitors including the ignition transformers are known per se.
  • the DE 103 39 587 A1 describes a lamp cap with an ignition transformer for a high-pressure gas discharge lamp.
  • the ignition transformer comprises a housing which encloses at least one winding.
  • For installation in the correct position of the ignition transformer in the lamp base of the ignition transformer is provided on its outside with webs.
  • the lamp base has corresponding grooves and prudence.
  • the ignition transformer should be suitable in this way for automatic installation in the lamp base and for automated contacting. This automatic production is not described further.
  • An ignition device is known with an ignition transformer for a high-pressure gas discharge lamp, in which a secondary winding is formed by a metal strip. This is arranged on an annular ferrite core, that a high voltage leading end of the secondary winding is disposed inside. In this way, the ignition transformer is to be improved. Automated production is difficult and time-consuming.
  • the object of the invention is to provide an ignition transformer for a high-pressure gas discharge lamp, the installation of which is simplified by means of machines in an ignition device.
  • two longitudinally spaced ramp-like elevations are formed on an outer side of the housing, is guided over each of which an end portion of the primary winding, wherein the elevations have flat surfaces.
  • Spaced apart in the longitudinal direction means for the elevations that they are arranged one behind the other in the direction of the longitudinal axis of the housing.
  • the elevations are formed like a ramp, so from the circumference of the housing with a continuous transition to the flat surfaces.
  • the primary winding is guided over the elevations, in the region of which the ends of the primary winding and thus their electrical connections are arranged.
  • the protrusions when installed in an ignitor, are aligned to face a component to which the primary winding is to be connected, e.g. to a circuit board. In this way, the end regions of the primary winding can be directly connected without further steps, such as e.g. connect with intermediate cables or contacts to be connected after applying the electrical component to this. This connection can be fully automatic e.g. done by laser welding.
  • a cross-section of the housing and the core is oval. This allows for a high compactness of the igniter a relatively large core cross-sectional area.
  • Lateral radial webs on ramps of the elevations of a preferred embodiment facilitate winding of the primary winding and, after a corresponding deformation, fix the ends of the primary winding.
  • the deformation is cold or warm. In this case, the webs are pressed against the primary winding, so that it is clamped between the associated ramp and the deformed webs. The deformation takes place with the help of automatic machines.
  • a first of the sides of the housing is partially closed. This facilitates the positioning of the core and the secondary winding in the housing.
  • the closure serves as a stop for the core.
  • a step is laterally formed on the inside of the housing in the vicinity of the first side so that it serves as a stop for the secondary winding. In this way, the housing, the core and the secondary winding are aligned exactly to one another.
  • the attachment of a high voltage contact to the housing near the first side allows easy connection of the high voltage to a lamp.
  • a support for a second contact plate is formed between a second of the sides of the housing and an adjacent one of the elevations, this can easily be aligned exactly during assembly.
  • a groove extending in its longitudinal direction is arranged on an inner wall of the housing. This facilitates the entry of potting their degassing and thus increases the reliability of the ignition transformer.
  • the ignition transformer is designed for use in a two-part ignitor housing, guide bars being arranged in the ignitor housing.
  • a compact ignitor is provided, wherein the ignition transformer is accurately positioned in the ignitor housing. The automatic production of the entire ignitor is further facilitated.
  • a circuit board is formed with the elevations spatially corresponding contact surfaces.
  • the primary winding can be fully automatically connected to the circuit board.
  • Preferably arranged through holes allow welding of the contact surfaces with the associated end portions of the primary winding by means of laser.
  • an ignition transformer 1 for a high-pressure gas discharge lamp comprises a housing 2 made of an electrically non-conductive material, such as plastic.
  • the housing 2 has an oval cross-section and two at least partially open sides which face each other. The oval is composed of a rectangle and two semicircles attached to it.
  • a core 3 made of ferrite and a secondary winding 4 are arranged so that between the housing 2 and the secondary winding 4 and between this and the core 3, a small clearance is present.
  • FIG. 1 left side 5 of the housing 2 is partially closed so that here a lower portion of the housing 2 is open.
  • a first contact plate 6 for electrical connection of the first end of the secondary winding 4 is fastened in a region near the first side 5 in a correspondingly formed eyelet.
  • the first page 5 serves as a stop for the core 3 and by means of a arranged in the housing 2 level also for the secondary winding 4.
  • the stage is in predetermined short distance to the first side 5 radially formed on an inner wall of the housing 2. In this way, an exact positioning of the core 3 and the secondary winding 4 in the housing 2 is made possible during pre-assembly.
  • a second contact plate 14 is secured in a correspondingly formed eyelet in a region of a second side of the housing 2. So that the second contact plate 14 assumes a predetermined position during pre-assembly, it is associated with a support 15 which is formed on the housing 2. The support 15 determines in particular an altitude (height based on Figures 1 and 2 ) of the second contact sheet 14.
  • each of the elevations 8 comprises ramps 10 and at its upper end a flat surface 9, wherein the surfaces 9 are in one plane. Between the surface 9 of each elevation 8 and a circumference of the housing 2, one of the ramps 10 is formed on both sides, which causes a gradual transition between the circumference of the housing 2 and the surface 9. On the longitudinal sides of each ramp 10, a web 11 is formed, which extends radially to the housing 2 and the ramp 10 laterally limited.
  • a primary winding 12 is guided in a thread-like manner.
  • the primary winding 12 is formed with three windings of a band. End regions of the primary winding 12 are fastened to the housing 2 in the region of the ramps 10.
  • separating webs 13 are arranged on the housing 2 in the region of the vertexes.
  • the arrangement of the ramps 10 corresponds to the thread-like guidance of the primary winding 12.
  • the secondary winding 4 and the core 3 are inserted into the housing 1 up to their respective stop.
  • the first and second contact plates 6, 14 are secured in the associated eyelets on the housing 2 and contacted with the associated end of the secondary winding 4.
  • the primary winding 12 is around the housing 2 and this over the elevations 8 wrapped.
  • the band of the primary winding 12 in the region of the surfaces 9 depending on the design of contact surfaces of an associated circuit board (not shown) fixed to the surfaces 9 resiliently, that is at a small distance, or fitting out and attached.
  • the webs 11 are cold or hot deformed so that the end portions of the primary winding 12 are fixed to the housing 2.
  • the ignition transformer 1 is intended for installation in a Zündtechnikgepuruse 17, which in the FIG. 4 is shown.
  • the ignitor housing 17 is split in two, open on a main surface and comprises a base 18 for a gas discharge lamp.
  • a first part of the ignitor housing 17 is designed for receiving the ignition transformer 1, wherein an exact mutual positioning is predetermined.
  • 17 guide webs 18 are arranged in the first part of the ignitor housing, which are matched to the housing 2.
  • the first contact plate 6 is electrically connected to the base 19. Remaining space in the housing 2 and partially in the igniter housing 17 is filled with potting compound.
  • a groove 16 is inserted on its inner wall, which groove extends in the longitudinal direction of the housing 2 in an inner vertex line adjacent to the elevations.
  • the printed circuit board is inserted into the ignitor housing 17. It is equipped with electrical / electronic components and contact surfaces, which point into the interior of the ignitor housing 17. When the circuit board is mounted, the positions of the contact surfaces correspond exactly to the positions of the elevations 8 and the second contact plate 14.
  • the ignitor housing 17 with the ignition transformer 1 and the printed circuit board form an ignition device.
  • a socket 20 is disposed on the igniter housing 17.
  • the ignitor of the ignition transformer 1 is inserted into the first part of the ignitor housing 17 and the first contact plate 6 attached to a corresponding contact of the base 19, for example by means of laser welding.
  • the potting compound is filled.
  • the circuit board is inserted and fixed to the ignitor housing 17.
  • the contact surfaces on the one hand and the end portions of the primary winding 12 and the second contact plate 14 on the other hand are fastened to each other, for example by means of laser welding.
  • the ignitor housing 17 is closed by means of a lid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Discharge Lamp (AREA)

Abstract

The ignition transformer (1) has a housing (2) with two partially open opposite sides, and a core (3) made of soft magnetic material, which is supported in the housing. A screw-like primary winding (12) made of strip-shaped metal is guided helically around the housing, and a secondary winding (4) is guided around the core. Two longitudinally spaced ramp-like projections (8) are formed on the outer side of the housing, over which an end area of the primary winding is guided. The projections have flat surfaces (9).

Description

Die Erfindung betrifft einen Zündtransformator für eine Hochdruckgasentladungslampe gemäß dem Oberbegriff des Anspruchs 1.The invention relates to an ignition transformer for a high-pressure gas discharge lamp according to the preamble of claim 1.

In Kraftfahrzeugen werden für Frontscheinwerfer wegen der besseren Lichtausbeute vermehrt Hochdruckgasentladungslampen wie z.B. Xenonlampen eingesetzt. Diese Lampen benötigen zum Starten eine hohe Zündspannung von mehreren kV, die als Spannungsimpuls in einem Zündgerät erzeugt wird. Diese Zündgeräte umfassen ein Zündgerätegehäuse, in dem ein Zündtransformator und eine Leiterplatte mit elektrischen/ elektronischen Bauteilen befestigt sind. Dem Zündgerät ist gewöhnlich ein Vorschaltgerät vorgeschaltet.In motor vehicles, high-pressure gas discharge lamps, such as e.g. Xenon lamps used. These lamps require for starting a high ignition voltage of several kV, which is generated as a voltage pulse in an ignitor. These ignitors include a ignitor housing in which an ignition transformer and a printed circuit board are mounted with electrical / electronic components. The ignitor is usually preceded by a ballast.

Solche Zündgeräte einschließlich der Zündtransformatoren sind an sich bekannt.Such ignitors including the ignition transformers are known per se.

Die DE 103 39 587 A1 beschreibt einen Lampensockel mit einem Zündtransformator für eine Hochdruckgasentladungslampe. Der Zündtransformator umfasst ein Gehäuse, das mindestens eine Wicklung umschließt. Zum lagerichtigen Einbau des Zündtransformators in den Lampensockel ist der Zündtransformator an seiner Außenseite mit Stegen versehen. Der Lampensockel weist entsprechende Nuten sowie Anstandhalter auf. Der Zündtransformator soll auf diese Weise für einen automatischen Einbau in den Lampensockel und für eine automatisierte Kontaktierung geeignet sein. Diese automatische Fertigung ist nicht weiter beschrieben.The DE 103 39 587 A1 describes a lamp cap with an ignition transformer for a high-pressure gas discharge lamp. The ignition transformer comprises a housing which encloses at least one winding. For installation in the correct position of the ignition transformer in the lamp base of the ignition transformer is provided on its outside with webs. The lamp base has corresponding grooves and prudence. The ignition transformer should be suitable in this way for automatic installation in the lamp base and for automated contacting. This automatic production is not described further.

Aus der DE 10 2004 044 368 A1 ist eine Zündvorrichtung mit einem Zündtransformator für eine Hochdruckgasentladungslampe bekannt, bei dem eine Sekundärwicklung von einem Metallband gebildet ist. Dieses ist so auf einem ringförmigen Ferritkern angeordnet, dass ein Hochspannung führendes Ende der Sekundärwicklung innen liegend angeordnet ist. Auf diese Weise soll der Zündtransformator verbessert werden. Eine automatisierte Fertigung ist schwierig und aufwändig.From the DE 10 2004 044 368 A1 An ignition device is known with an ignition transformer for a high-pressure gas discharge lamp, in which a secondary winding is formed by a metal strip. This is arranged on an annular ferrite core, that a high voltage leading end of the secondary winding is disposed inside. In this way, the ignition transformer is to be improved. Automated production is difficult and time-consuming.

In der DE 20 2005 007 484 U1 ist ein Zündtransformator für eine Gasentladungsleuchte mit einem offenen, nicht geradlinigen magnetischen Kern und einem Spulenkörper offenbart, der auf dem Kern aufgebracht ist und mehrere Kammern zur Aufnahme einer Sekundärwicklung aufweist. Auf diese Weise soll bei kompakter Bauweise die Flexibilität bei der Auslegung des Zündtransformators erzielt werden. Der Zündtransformator ist aufwändig und nur schwer automatisch zu fertigen.In the DE 20 2005 007 484 U1 discloses an ignition transformer for a gas discharge lamp with an open, non-linear magnetic core and a bobbin, which is applied to the core and having a plurality of chambers for receiving a secondary winding. In this way, the flexibility in the design of the ignition transformer is to be achieved in a compact design. The ignition transformer is complex and difficult to produce automatically.

Aufgabe der Erfindung ist es, einen Zündtransformator für eine Hochdruckgasentladungslampe zu schaffen, dessen Einbau mittels Automaten in ein Zündgerät vereinfacht ist.The object of the invention is to provide an ignition transformer for a high-pressure gas discharge lamp, the installation of which is simplified by means of machines in an ignition device.

Die Aufgabe ist durch die Merkmale des Anspruchs 1 gelöst. Bei dem erfindungsgemäßen Zündtransformator sind auf einer Außenseite des Gehäuses zwei in Längsrichtung beabstandete rampenartige Erhebungen ausgebildet, über die jeweils ein Endbereich der Primärwicklung geführt ist, wobei die Erhebungen ebene Flächen aufweisen. In Längsrichtung beabstandet bedeutet für die Erhebungen, dass sie in Richtung der Längsachse des Gehäuses hintereinander angeordnet sind. Die Erhebungen sind rampenartig ausgebildet, also von dem Umfang des Gehäuses mit kontinuierlichem Übergang zu den ebenen Flächen. Die Primärwicklung ist über die Erhebungen geführt, wobei in deren Bereich die Enden der Primärwicklung und somit deren elektrische Anschlüsse angeordnet sind. Die Erhebungen werden bei einem Einbau in ein Zündgerät so ausgerichtet, dass sie zu einem Bauteil weisen, an das die Primärwicklung anzuschließen ist, z.B. zu einer Leiterplatte. Auf diese Weise können die Endbereiche der Primärwicklung direkt ohne weitere Schritte, wie z.B. verbinden mit Zwischenkabeln oder Kontakten, nach einem Aufbringen des elektrischen Bauteils an dieses angeschlossen werden. Dieser Anschluss kann vollautomatisch z.B. durch Laserschweißen erfolgen.The object is solved by the features of claim 1. In the ignition transformer according to the invention two longitudinally spaced ramp-like elevations are formed on an outer side of the housing, is guided over each of which an end portion of the primary winding, wherein the elevations have flat surfaces. Spaced apart in the longitudinal direction means for the elevations that they are arranged one behind the other in the direction of the longitudinal axis of the housing. The elevations are formed like a ramp, so from the circumference of the housing with a continuous transition to the flat surfaces. The primary winding is guided over the elevations, in the region of which the ends of the primary winding and thus their electrical connections are arranged. The protrusions, when installed in an ignitor, are aligned to face a component to which the primary winding is to be connected, e.g. to a circuit board. In this way, the end regions of the primary winding can be directly connected without further steps, such as e.g. connect with intermediate cables or contacts to be connected after applying the electrical component to this. This connection can be fully automatic e.g. done by laser welding.

Die Unteransprüche betreffen die vorteilhafte Ausgestaltung der Erfindung.The subclaims relate to the advantageous embodiment of the invention.

In einer Alternative ist ein Querschnitt des Gehäuses und des Kerns oval. Dies erlaubt bei hoher Kompaktheit des Zündgeräts eine relativ große Kernquerschnittsfläche.In an alternative, a cross-section of the housing and the core is oval. This allows for a high compactness of the igniter a relatively large core cross-sectional area.

Seitliche radiale Stege an Rampen der Erhebungen einer bevorzugten Ausführung erleichtern das Wickeln der Primärwicklung und fixieren nach einer entsprechenden Verformung die Enden der Primärwicklung. Je nach Material des Gehäuses erfolgt die Verformung kalt oder warm. Hierbei werden die Stege gegen die Primärwicklung gepresst, so dass diese zwischen der zugehörigen Rampe und den verformten Stegen festgeklemmt ist. Die Verformung erfolgt mit Hilfe von Automaten.Lateral radial webs on ramps of the elevations of a preferred embodiment facilitate winding of the primary winding and, after a corresponding deformation, fix the ends of the primary winding. Depending on the material of the housing, the deformation is cold or warm. In this case, the webs are pressed against the primary winding, so that it is clamped between the associated ramp and the deformed webs. The deformation takes place with the help of automatic machines.

Eine ersten der Seiten des Gehäuses ist teilweise geschlossen. Dies erleichtert das Positionieren des Kerns und der Sekundärwicklung in dem Gehäuse. Der Verschluss dient dabei als Anschlag für den Kern. Bevorzugt ist seitlich innen an dem Gehäuse in der Nähe der ersten Seite eine Stufe so ausgebildet, dass diese als Anschlag für die Sekundärwicklung dient. Auf diese Weise sind das Gehäuse, der Kern und die Sekundärwicklung exakt zueinander ausrichtbar.A first of the sides of the housing is partially closed. This facilitates the positioning of the core and the secondary winding in the housing. The closure serves as a stop for the core. Preferably, a step is laterally formed on the inside of the housing in the vicinity of the first side so that it serves as a stop for the secondary winding. In this way, the housing, the core and the secondary winding are aligned exactly to one another.

Die Befestigung eines Kontakts für Hochspannung an dem Gehäuse in der Nähe der ersten Seite ermöglicht eine einfache Anbindung der Hochspannung an eine Lampe.The attachment of a high voltage contact to the housing near the first side allows easy connection of the high voltage to a lamp.

Wenn zwischen einer zweiten der Seiten des Gehäuses und einer benachbarten der Erhebungen eine Stütze für ein zweites Kontaktblech ausgebildet ist, kann dieses bei der Montage leicht exakt ausgerichtet werden.If a support for a second contact plate is formed between a second of the sides of the housing and an adjacent one of the elevations, this can easily be aligned exactly during assembly.

In einer weiteren Alternative ist an einer Innenwand des Gehäuses eine sich in dessen Längsrichtung erstreckende Nut angeordnet. Diese erleichtert beim Eintragen von Vergussmasse deren Entgasen und erhöht somit die Funktionssicherheit des Zündtransformators.In a further alternative, a groove extending in its longitudinal direction is arranged on an inner wall of the housing. This facilitates the entry of potting their degassing and thus increases the reliability of the ignition transformer.

Bevorzugt ist der Zündtransformator für einen Einsatz in ein zweigeteiltes Zündgerätegehäuse ausgebildet, wobei in dem Zündgerätegehäuse Führungsstege angeordnet sind. Auf diese Weise wird ein kompaktes Zündgerät geschaffen, wobei der Zündtransformator in dem Zündgerätegehäuse exakt positioniert ist. Die Automatische Fertigung des gesamten Zündgeräts ist weiter erleichtert.Preferably, the ignition transformer is designed for use in a two-part ignitor housing, guide bars being arranged in the ignitor housing. In this way, a compact ignitor is provided, wherein the ignition transformer is accurately positioned in the ignitor housing. The automatic production of the entire ignitor is further facilitated.

In einer weiteren Alternative ist eine Leiterplatte mit den Erhebungen räumlich entsprechenden Kontaktflächen ausgebildet. Auf diese Weise ist die Primärwicklung vollautomatisch an die Leiterplatte anschließbar. Bevorzugt angeordnete Durchgangsbohrung ermöglichen ein Verschweißen der Kontaktflächen mit den zugehörigen Endbereichen der Primärwicklung mittels Laser.In a further alternative, a circuit board is formed with the elevations spatially corresponding contact surfaces. In this way, the primary winding can be fully automatically connected to the circuit board. Preferably arranged through holes allow welding of the contact surfaces with the associated end portions of the primary winding by means of laser.

Anhand der beigefügten Zeichnungen wird die Erfindung nachfolgend näher erläutert. Dabei zeigt:

Figur 1
eine perspektivische Ansicht eines Zündtransformators für eine Hochdruckgasentladungslampe,
Figur 2
eine perspektivische Ansicht eines Gehäuses des Zündtransformators,
Figur 3
eine Draufsicht auf das Gehäuse gemäß der Figur 2 und
Fig. 4
eine Draufsicht auf ein Zündgehäuses einschließlich des darin eingesetzten Zündtransformators.
Reference to the accompanying drawings, the invention is explained in more detail below. Showing:
FIG. 1
a perspective view of an ignition transformer for a high-pressure gas discharge lamp,
FIG. 2
a perspective view of a housing of the ignition transformer,
FIG. 3
a plan view of the housing according to the FIG. 2 and
Fig. 4
a plan view of a Zündgehäuses including the ignition transformer inserted therein.

Wie aus der Figur 1 ersichtlich umfasst ein Zündtransformator 1 für eine Hochdruckgasentladungslampe ein Gehäuse 2 aus einem elektrisch nicht leitendem Material wie z.B. Kunststoff. Das Gehäuse 2 weist einen ovalen Querschnitt und zwei zumindest teilweise offenen Seiten auf, die sich gegenüber liegen. Das Oval ist aus einem Rechteck und zwei daran angesetzten Halbkreisen zusammengesetzt. In dem Gehäuse 2 sind ein Kern 3 aus Ferrit sowie eine Sekundärwicklung 4 so angeordnet, dass zwischen dem Gehäuse 2 und der Sekundärwicklung 4 sowie zwischen dieser und dem Kern 3 ein geringes Spiel vorhanden ist.Like from the FIG. 1 As can be seen, an ignition transformer 1 for a high-pressure gas discharge lamp comprises a housing 2 made of an electrically non-conductive material, such as plastic. The housing 2 has an oval cross-section and two at least partially open sides which face each other. The oval is composed of a rectangle and two semicircles attached to it. In the housing 2, a core 3 made of ferrite and a secondary winding 4 are arranged so that between the housing 2 and the secondary winding 4 and between this and the core 3, a small clearance is present.

Eine erste, nach der Figur 1 linke Seite 5 des Gehäuses 2 ist teilweise so geschlossen, dass hier ein unterer Bereich des Gehäuses 2 offen ist. Auf diese Weise ist es möglich, ein Hochspannung führendes erstes Ende der Sekundärwicklung 4 aus dem Gehäuse 2 herauszuführen und anzuschließen. An dem Gehäuse 2 ist in einem Bereich nahe der ersten Seite 5 in einer entsprechend ausgebildeten Öse ein erstes Kontaktblech 6 zum elektrischen Anschluss des ersten Endes der Sekundärwicklung 4 befestigt. Die erste Seite 5 dient als Anschlag für den Kern 3 und mittels einer in dem Gehäuse 2 angeordneten Stufe auch für die Sekundärwicklung 4. Die Stufe ist in vorbestimmtem kurzem Abstand zu der ersten Seite 5 radial an einer inneren Wand des Gehäuses 2 ausgebildet. Auf diese Weise ist bei der Vormontage eine exakte Positionierung des Kerns 3 und der Sekundärwicklung 4 in dem Gehäuse 2 ermöglicht.A first, after the FIG. 1 left side 5 of the housing 2 is partially closed so that here a lower portion of the housing 2 is open. In this way, it is possible to lead out and connect a high voltage leading first end of the secondary winding 4 from the housing 2. On the housing 2, a first contact plate 6 for electrical connection of the first end of the secondary winding 4 is fastened in a region near the first side 5 in a correspondingly formed eyelet. The first page 5 serves as a stop for the core 3 and by means of a arranged in the housing 2 level also for the secondary winding 4. The stage is in predetermined short distance to the first side 5 radially formed on an inner wall of the housing 2. In this way, an exact positioning of the core 3 and the secondary winding 4 in the housing 2 is made possible during pre-assembly.

Zum Anschluss eines zweiten Endes der Sekundärwicklung 4 ist in einem Bereich einer zweiten Seite des Gehäuses 2 ein zweites Kontaktblech 14 in einer entsprechend ausgebildeten Öse befestigt. Damit das zweite Kontaktblech 14 bei der Vormontage eine vorbestimmte Position einnimmt, ist ihm eine Stütze 15 zugeordnet, die auf dem Gehäuse 2 ausgebildet ist. Die Stütze 15 bestimmt insbesondere eine Höhenlage (Höhe bezogen auf Figuren 1 und 2) des zweiten Kontaktblechs 14.For connecting a second end of the secondary winding 4, a second contact plate 14 is secured in a correspondingly formed eyelet in a region of a second side of the housing 2. So that the second contact plate 14 assumes a predetermined position during pre-assembly, it is associated with a support 15 which is formed on the housing 2. The support 15 determines in particular an altitude (height based on Figures 1 and 2 ) of the second contact sheet 14.

Auf dem Gehäuse 2, das in den Figuren 2 und 3 deutlicher dargestellt ist, sind zwei Erhebungen 8 so angeordnet, dass eine erste links und eine zweite rechts von einer oberen Scheitellinie des Gehäuses 2 ist. Jede der Erhebungen 8 umfasst Rampen 10 und an ihrem oberen Ende eine ebene Fläche 9, wobei die Flächen 9 in einer Ebene sind. Zwischen der Fläche 9 jeder Erhebung 8 und einem Umfang des Gehäuses 2 ist beidseitig eine der Rampen 10 ausgebildet, die einen allmählichen Übergang zwischen dem Umfang des Gehäuses 2 und der Fläche 9 bewirkt. An den Längsseiten jeder Rampe 10 ist ein Steg 11 ausgebildet, der sich radial zu dem Gehäuse 2 erstreckt und die Rampe 10 seitlich begrenzt.On the housing 2, in the Figures 2 and 3 is shown more clearly, two elevations 8 are arranged so that a first left and a second right of an upper apex line of the housing 2 is. Each of the elevations 8 comprises ramps 10 and at its upper end a flat surface 9, wherein the surfaces 9 are in one plane. Between the surface 9 of each elevation 8 and a circumference of the housing 2, one of the ramps 10 is formed on both sides, which causes a gradual transition between the circumference of the housing 2 and the surface 9. On the longitudinal sides of each ramp 10, a web 11 is formed, which extends radially to the housing 2 and the ramp 10 laterally limited.

Über die Erhebungen 8 und das Gehäuse 2 ist eine Primärwicklung 12 gewindeartig geführt. Die Primärwicklung 12 ist mit drei Wicklungen aus einem Band gebildet. Endbereiche der Primärwicklung 12 sind an dem Gehäuse 2 im Bereich der Rampen 10 befestigt. Zur besseren Führung der Primärwicklung 12 sind auf dem Gehäuse 2 im Bereich der Scheitelpunkte Trennstege 13 angeordnet. Die Anordnung der Rampen 10 entspricht der gewindeartigen Führung der Primärwicklung 12.About the elevations 8 and the housing 2, a primary winding 12 is guided in a thread-like manner. The primary winding 12 is formed with three windings of a band. End regions of the primary winding 12 are fastened to the housing 2 in the region of the ramps 10. For better guidance of the primary winding 12, separating webs 13 are arranged on the housing 2 in the region of the vertexes. The arrangement of the ramps 10 corresponds to the thread-like guidance of the primary winding 12.

Zur vollautomatischen Vormontage des Zündtransformators 1 werden die Sekundärwicklung 4 und der Kern 3 bis zu ihrem jeweiligen Anschlag in das Gehäuse 1 eingeführt. Das erste und das zweite Kontaktblech 6, 14 werden in der zugehörigen Ösen an dem Gehäuse 2 befestigt und mit dem zugeordneten Ende der Sekundärwicklung 4 kontaktiert. Die Primärwicklung 12 wird um das Gehäuse 2 und hierbei über die Erhebungen 8 gewickelt. Hierbei ist das Band der Primärwicklung 12 im Bereich der Flächen 9 je nach Ausführung von Kontaktflächen einer zugehörigen Leiterplatte (nicht dargestellt) fest an den Flächen 9 federnd, das heißt mit geringem Abstand, oder anliegend geführt und befestigt. Die Stege 11 werden derart kalt oder warm verformt, dass die Endbereiche der Primärwicklung 12 an dem Gehäuse 2 fixiert sind.For fully automatic pre-assembly of the ignition transformer 1, the secondary winding 4 and the core 3 are inserted into the housing 1 up to their respective stop. The first and second contact plates 6, 14 are secured in the associated eyelets on the housing 2 and contacted with the associated end of the secondary winding 4. The primary winding 12 is around the housing 2 and this over the elevations 8 wrapped. Here, the band of the primary winding 12 in the region of the surfaces 9 depending on the design of contact surfaces of an associated circuit board (not shown) fixed to the surfaces 9 resiliently, that is at a small distance, or fitting out and attached. The webs 11 are cold or hot deformed so that the end portions of the primary winding 12 are fixed to the housing 2.

Der Zündtransformator 1 ist für einen Einbau in ein Zündgerätegehäuse 17 bestimmt, das in der Figur 4 dargestellt ist. Das Zündgerätegehäuse 17 ist zweigeteilt, an einer Hauptfläche offen und umfasst einen Sockel 18 für eine Gasentladungslampe. Ein erster Teil des Zündgerätegehäuses 17 ist für die Aufnahme des Zündtransformators 1 ausgebildet, wobei eine exakte gegenseitige Positionierung vorbestimmt ist. Hierfür sind in dem ersten Teil des Zündgerätegehäuses 17 Führungsstege 18 angeordnet, die auf das Gehäuse 2 abgestimmt sind. Das erste Kontaktblech 6 ist mit dem Sockel 19 elektrisch verbindbar. Verbliebener Raum in dem Gehäuse 2 und teilweise in dem Zündgerätegehäuse 17 wird mit Vergussmasse verfüllt. Damit hierbei eventuell in der Vergussmasse entstehende Gasblasen besser aus dem Gehäuse 2 entweichen können, ist an seiner Innenwand eine Nut 16 eingelassen, die sich in Längsrichtung des Gehäuses 2 in einer inneren Scheitellinie benachbart zu den Erhebungen erstreckt. Die Leiterplatte ist in das Zündgerätegehäuse 17 eingesetzt. Sie ist mit elektrischen/elektronischen Bauteilen und Kontaktflächen bestückt, die in das Innere des Zündgerätegehäuses 17 weisen. Die Positionen der Kontaktflächen entsprechen bei montierter Leiterplatte genau den Positionen der Erhebungen 8 und des zweiten Kontaktblechs 14. Das Zündgerätegehäuse 17 mit dem Zündtransformator 1 und der Leiterplatte bilden ein Zündgerät. Zum elektrischen Anschluss des Zündgeräts an ein Vorschaltgerät ist eine Steckdose 20 an dem Zündgerätegehäuse 17 angeordnet.The ignition transformer 1 is intended for installation in a Zündgerätegehäuse 17, which in the FIG. 4 is shown. The ignitor housing 17 is split in two, open on a main surface and comprises a base 18 for a gas discharge lamp. A first part of the ignitor housing 17 is designed for receiving the ignition transformer 1, wherein an exact mutual positioning is predetermined. For this purpose, 17 guide webs 18 are arranged in the first part of the ignitor housing, which are matched to the housing 2. The first contact plate 6 is electrically connected to the base 19. Remaining space in the housing 2 and partially in the igniter housing 17 is filled with potting compound. So that gas bubbles which may possibly arise in the potting compound can better escape from the housing 2, a groove 16 is inserted on its inner wall, which groove extends in the longitudinal direction of the housing 2 in an inner vertex line adjacent to the elevations. The printed circuit board is inserted into the ignitor housing 17. It is equipped with electrical / electronic components and contact surfaces, which point into the interior of the ignitor housing 17. When the circuit board is mounted, the positions of the contact surfaces correspond exactly to the positions of the elevations 8 and the second contact plate 14. The ignitor housing 17 with the ignition transformer 1 and the printed circuit board form an ignition device. For electrical connection of the ignitor to a ballast, a socket 20 is disposed on the igniter housing 17.

Zur vollautomatischen Montage des Zündgeräts wird der Zündtransformator 1 in den ersten Teil des Zündgerätegehäuses 17 eingesetzt und das erste Kontaktblech 6 an einem entsprechenden Kontakt des Sockels 19 z.B. mittels Laserschweißen befestigt. Die Vergussmasse wird eingefüllt. Die Leiterplatte wird auf das Zündgerätegehäuse 17 eingesetzt und befestigt. Hierbei liegen die entsprechenden Kontaktflächen der Leiterplatte an den Endbereichen der Primärwicklung 12 sowie an dem zweiten Kontaktblech 14 an. Die Kontaktflächen einerseits sowie die Endbereiche der Primärwicklung 12 und das zweite Kontaktblech 14 andererseits werden aneinander befestigt, z.B. mittels Laserschweißen. Das Zündgerätegehäuse 17 wird mittels eines Deckels verschlossen.For fully automatic assembly of the ignitor of the ignition transformer 1 is inserted into the first part of the ignitor housing 17 and the first contact plate 6 attached to a corresponding contact of the base 19, for example by means of laser welding. The potting compound is filled. The circuit board is inserted and fixed to the ignitor housing 17. Here are the corresponding contact surfaces of the circuit board at the end portions of the primary winding 12 and on the second contact plate 14 at. The contact surfaces on the one hand and the end portions of the primary winding 12 and the second contact plate 14 on the other hand are fastened to each other, for example by means of laser welding. The ignitor housing 17 is closed by means of a lid.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Zündtransformatorignition transformer
22
Gehäusecasing
33
Kerncore
44
Sekundärwicklungsecondary winding
55
Bügelhanger
66
erstes Kontaktblechfirst contact sheet
77
88th
Erhebungsurvey
99
Flächearea
1010
Ramperamp
1111
Stegweb
1212
Primärwicklungprimary
1313
Trennstegdivider
1414
zweites Kontaktblechsecond contact plate
1515
Stützesupport
1616
Nutgroove
1717
Zündgerätegehäuseignitor
1818
Führungsstegguide web
1919
Sockelbase
2020
Steckerplug

Claims (9)

Zündtransformator für eine Hochdruckgasentladungslampe, umfassend
ein Gehäuse (2) mit zwei gegenüberliegenden zumindest teilweise offenen Seiten,
einen Kern (3) aus weichmagnetischem Material, der in dem Gehäuse (2) gelagert ist,
eine Primärwicklung (12), die schraubenartig aus bandförmigem Metall um das Gehäuse (2) geführt ist und
eine Sekundärwicklung (4) um den Kern (3),
dadurch gekennzeichnet, dass auf einer Außenseite des Gehäuses (2) zwei in Längsrichtung beabstandete rampenartige Erhebungen (8) ausgebildet sind, über die jeweils ein Endbereich der Primärwicklung (12) geführt ist, wobei die Erhebungen (8) ebene Flächen (9) aufweisen.Ignition transformer for a high-pressure gas discharge lamp, comprising
a housing (2) with two opposite sides, at least partially open,
a core (3) of soft magnetic material, which is mounted in the housing (2),
a primary winding (12) which is helically guided from strip-shaped metal around the housing (2) and
a secondary winding (4) around the core (3),
characterized in that on an outer side of the housing (2) two longitudinally spaced ramp-like elevations (8) are formed, over each of which an end portion of the primary winding (12) is guided, wherein the elevations (8) have flat surfaces (9). Zündtransformator nach Anspruch 1, dadurch gekennzeichnet, dass ein Inneres des Gehäuses (2) und der Kern (3) einen ovalen Querschnitt aufweisen.Ignition transformer according to claim 1, characterized in that an interior of the housing (2) and the core (3) have an oval cross-section. Zündtransformator nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass Rampen (10) der Erhebungen (8) seitliche radiale Stege (11) aufweisen.Ignition transformer according to claim 1 or 2, characterized in that ramps (10) of the elevations (8) have lateral radial webs (11). Zündtransformator nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass eine ersten der Seiten des Gehäuses (2) teilweise geschlossen ist.Ignition transformer according to one of claims 1 to 3, characterized in that a first of the sides of the housing (2) is partially closed. Zündtransformator nach Anspruch 4, dadurch gekennzeichnet, dass an dem Gehäuse (2) in vorbestimmtem kurzem Abstand zu der ersten Seite ein erstes Kontaktblech (6) für Hochspannung befestigt ist.Ignition transformer according to claim 4, characterized in that on the housing (2) at a predetermined short distance to the first side, a first contact plate (6) is fixed for high voltage. Zündtransformator nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass zwischen einer zweiten der Seiten des Gehäuses (2) und einer benachbarten der Erhebungen (8) eine Stütze (15) für ein zweites Kontaktblech (14) ausgebildet ist.Ignition transformer according to one of Claims 1 to 5, characterized in that a support (15) for a second contact plate (14) is formed between a second of the sides of the housing (2) and an adjacent one of the elevations (8). Zündtransformator nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass an einer Innenwand des Gehäuses (2) eine sich in dessen Längsrichtung erstreckende Nut (16) angeordnet ist.Ignition transformer according to one of claims 1 to 6, characterized in that on an inner wall of the housing (2) in the longitudinal direction extending groove (16) is arranged. Zündtransformator nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass er für einen Einsatz in ein zweigeteiltes Zündgerätegehäuse (17) ausgebildet ist, wobei in dem Zündgerätegehäuse (17) Führungsstege (18) angeordnet sind.Ignition transformer according to one of claims 1 to 7, characterized in that it is designed for use in a two-part ignitor housing (17), wherein in the igniter housing (17) guide webs (18) are arranged. Zündtransformator nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass eine Leiterplatte mit den Erhebungen (8) räumlich entsprechenden Kontaktflächen ausgebildet ist.Ignition transformer according to one of claims 1 to 8, characterized in that a circuit board with the elevations (8) spatially corresponding contact surfaces is formed.
EP20100155112 2009-03-06 2010-03-02 Ignition transformer for a high pressure gas discharge lamp Not-in-force EP2226817B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009012087A DE102009012087A1 (en) 2009-03-06 2009-03-06 Ignition transformer for a high-pressure gas discharge lamp

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EP2226817A2 true EP2226817A2 (en) 2010-09-08
EP2226817A3 EP2226817A3 (en) 2011-04-06
EP2226817B1 EP2226817B1 (en) 2014-05-28

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DE (1) DE102009012087A1 (en)

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US20040066150A1 (en) 2000-12-19 2004-04-08 Klaus Neumeier Gas discharge lamp base comprising an ignition device
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DE10339587A1 (en) * 2003-08-26 2005-03-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Transformer, lamp base with a transformer and high pressure discharge lamp
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DE202005007484U1 (en) 2005-05-11 2006-09-21 Vogt Electronic Components Gmbh Ignition transformer and light socket for a discharge lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013208176A1 (en) * 2013-05-03 2014-11-20 Robert Bosch Gmbh Stabkerndrossel

Also Published As

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EP2226817A3 (en) 2011-04-06
EP2226817B1 (en) 2014-05-28

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