EP1847159B1 - Culot de lampe pour une lampe a decharge a haute pression et lampe a decharge a haute pression - Google Patents

Culot de lampe pour une lampe a decharge a haute pression et lampe a decharge a haute pression Download PDF

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Publication number
EP1847159B1
EP1847159B1 EP06705908A EP06705908A EP1847159B1 EP 1847159 B1 EP1847159 B1 EP 1847159B1 EP 06705908 A EP06705908 A EP 06705908A EP 06705908 A EP06705908 A EP 06705908A EP 1847159 B1 EP1847159 B1 EP 1847159B1
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EP
European Patent Office
Prior art keywords
core
lamp base
ignition transformer
core component
lamp
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
EP06705908A
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German (de)
English (en)
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EP1847159A1 (fr
Inventor
Daniel Lerchegger
Bernhard Siessegger
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Osram GmbH
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Osram GmbH
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Filing date
Publication date
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Publication of EP1847159A1 publication Critical patent/EP1847159A1/fr
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Publication of EP1847159B1 publication Critical patent/EP1847159B1/fr
Not-in-force legal-status Critical Current
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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/255—Magnetic cores made from particles
    • 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

  • the invention relates to a lamp base for a high-pressure discharge lamp according to the preamble of patent claim 1 and a high-pressure discharge lamp.
  • Such a lamp cap is for example in the WO 97/35336 disclosed.
  • This document describes a lamp base for a high-pressure discharge lamp with an ignition transformer arranged in the interior of the lamp base and having a closed core.
  • the Zündtransionnator is designed as a toroidal transformer.
  • An ignition transformer with a closed core has the disadvantage that it obstructs the polarity change of the lamp current due to its high inductance during lamp operation after completion of the ignition phase, when the high-pressure discharge lamp is operated with a current of alternating polarity and the secondary winding of the Zündtransfomlators is traversed by the lamp current.
  • the EP 1 278 403 A1 discloses an ignition transformer for a high pressure discharge lamp having a core having a first cylindrical core member on which the transformer windings are disposed and a second core member separated from the first core member by at least one gap and spanning the first core member and a magnetic return from a first to a second end of the first core member manufactures.
  • WO 02/51214 is a lamp base with a in the interior of the lamp base, arranged ignition transformer disclosed, which is designed as a rod core transformer.
  • This ignition transformer generates a strong magnetic stray field, which is connected to metallic parts of the lamp base and the high pressure discharge lamp interacts and affects the lamp current.
  • the stray field causes a flow of current in a metallic shielding housing that encloses the lamp cap for the purpose of improving electromagnetic compatibility.
  • the current flow in the metallic shielding housing influences the polarity change, that is, the current zero phases, of the lamp current and can lead to extinction of the high-pressure discharge lamp.
  • the available ignition voltage due to the losses in the shield case is reduced by the alternating magnetic field emanating from the ignition transformer during the generation of the ignition voltage pulses.
  • the ignition voltage pulses are significantly attenuated by the metallic shielding.
  • the lamp base for a high-pressure discharge lamp has an ignition transformer arranged in the interior of the lamp base for igniting the gas discharge in the high-pressure discharge lamp, the core of the ignition transformer being formed by a first and at least one second core component, each consisting of a ferromagnetic or ferrimagnetic material At least one gap are separated, wherein the first core member has a cylindrical portion on which the windings of the ignition transformer are arranged, and the core components are formed such that the at least one second core member spans the cylindrical portion of the first core member and a magnetic return from a first end of the first core member to a second end of the first core member manufactures.
  • the Zündtransatororkerns ensures that the transformer core has at least one gap and thus does not have the above-mentioned disadvantages of the toroidal transformer according to the above-cited prior art.
  • the secondary winding of the ignition transformer arranged in the lamp base according to the invention can therefore ensure a sufficient limitation of the lamp current immediately after the ignition of the gas discharge in the high-pressure discharge lamp and prevent an undesirably high increase in the lamp current.
  • the cylindrical portion of the first core member allows precise design and placement of the transformer windings either directly on the first core member or on a bobbin surrounding the cylindrical portion of the first core member.
  • the formation of the at least two core components such that the at least one second core component spans the portion of the first core component provided with the windings and produces a magnetic inference from a first end of the first core component to a second end of the first core component reduces the stray field of the ignition transformer considerably, because the magnetic field lines run almost completely in the core components consisting of ferromagnetic and ferrimagnetic material. Therefore, this ignition transformer does not induce appreciable currents in a metallic shield case of the lamp cap, which serves to improve the electromagnetic compatibility, and therefore does not have the disadvantages of the lamp base equipped with a rod core transformer according to the above-cited prior art.
  • the core components of the transformer core are arranged in a U-shape or form a frame which is interrupted only by the at least one gap. That is, in the latter case, the core components of the transformer along a closed, preferably extending in a plane, space curve are arranged.
  • the at least one second core component spans the cylindrical portion of the first core component such that it produces a magnetic inference from a first end of the first core component to a second end of the first core component. That is, the magnetic field lines emerging from the first end of the first core member are largely returned by means of the at least one second core member to the second end of the first core member.
  • a material having a lower permeability than that of the ferromagnetic or ferrimagnetic core member material is arranged to ensure sufficient energy storage capability of the ignition transformer and the above-mentioned current limiting effect of the secondary winding of the ignition transformer.
  • the aforementioned material of lower permeability is according to the invention an adhesive for bonding the at least two core components.
  • a high resistivity ferrite is preferably used, for example, nickel-zinc ferrite.
  • one of the transformer windings for example the secondary winding, can be wound directly onto the first core component.
  • the at least one gap between the core components of the ignition transformer advantageously has a width of less than or equal to 4 mm in order to keep the stray field of the transformer small.
  • the secondary and primary windings are preferably arranged one above the other, wherein the secondary winding is disposed inside and the primary winding is disposed outside.
  • the secondary winding is wound either directly on the cylindrical portion of the first core member or on a bobbin surrounding the aforementioned portion of the first core member.
  • the primary winding is preferably separated by electrical isolation over the secondary winding.
  • this pulse ignition device for the high-pressure discharge lamp is housed.
  • this pulse ignition device also includes a spark gap or a threshold value element, via which the ignition capacitor discharges when the breakdown voltage is exceeded.
  • the breakdown voltage of the spark gap or the threshold element is advantageously in the range of 400 V to 1500 V and the turns ratio of the transformer windings is advantageously in the range of 10 to 80. This ensures that on the one hand with the help of Impulszündvorraum sufficiently high ignition voltage pulses of up to 30 kV can be generated and on the other hand, during the lamp operation after the ignition phase in the current flowing through the lamp current secondary winding does not occur too large power losses.
  • the secondary winding of the ignition transformer for this purpose is additionally designed such that its DC resistance is less than 1 ohms.
  • the ignition transformer has a coil body surrounding the cylindrical portion of the first core component, on which at least one of the transformer windings is arranged, this coil body being provided with holding means for the at least one second core component.
  • the holding means may be formed as part of a housing of the ignition transformer, in which, for example, the first core member and one or both windings of the transformer and optionally a bobbin for the transformer windings are arranged.
  • the abovementioned holding means for the at least one second core component preferably comprise a snap-action or latching mechanism.
  • the at least one second core component can be fixed in a simple manner in a predetermined position and orientation relative to the first core component.
  • the at least one second core component of the ignition transformer is arranged in a cavity of the lamp cap, so that the assembly of the individual components of the ignition transformer thus takes place only when inserted into the lamp cap.
  • the aforementioned cavity for the at least one second core component is preferably located in one or more walls of the lamp cap, which form a chamber for the ignition transformer or for the first core component of the ignition transformer with the windings arranged thereon.
  • the at least one second core component of the transformer is formed as part of the lamp cap or the chamber wall and the walls of the chamber so equipped provide after insertion of the first core member into the chamber for optimal limitation of the magnetic stray field of the ignition transformer.
  • the at least one second core component can be fixed in the above-mentioned chamber by holding means which are attached to the lamp base. These retaining means preferably comprise a snap or latch mechanism.
  • the illustrated preferred embodiment of the high-pressure discharge lamp is a metal halide high-pressure discharge lamp, preferably a mercury-free metal halide high-pressure discharge lamp for a motor vehicle headlight.
  • This high-pressure discharge lamp has a discharge vessel 11 made of quartz glass surrounded by a glass outer bulb 12 and having electrodes 13, 14 arranged therein for generating a gas discharge.
  • the electrodes 13, 14 are each connected to a lead-out from the discharge vessel 11 power supply 15 and 16, via which they are supplied with electrical energy.
  • the existing from the discharge vessel 11 and the outer bulb 12 assembly 1 is fixed in the lamp base 2.
  • the lamp base 2 comprises a base outer part 21 and a cover 22 which closes the chambers of the base outer part 21, and a connection socket 40 for supplying power to the high-pressure discharge lamp.
  • the base outer part 21 and the cover 22 and the female housing 40 are of a Two-piece metal housing (not shown) enclosed.
  • the metal housing has a circular disk-shaped opening for the base upper part 211.
  • the base outer part 21 has a substantially square cross-section.
  • the in FIG. 2 illustrated interior of the base outer part 21 is divided by a partition wall 213 into two chambers 214, 215 of different sizes.
  • the transformer 1000 is mounted, which serves as an ignition transformer for accommodated in the lamp base 2 pulse ignition device of the high pressure discharge lamp.
  • second chamber 215 further components 61, 62 of the pulse ignition device are arranged.
  • an electrical contact element is embedded. It consists of a stainless steel and forms with the base outer part 21 a structural unit. Its ends 31, 32 have flat contact surfaces.
  • the first end 31 of the electrical contact element extends into the first chamber 214 and is welded after the assembly of the ignition transformer 1000 with the high voltage leading ignition voltage output of the ignition transformer 1000.
  • the second end 32 of the electrical contact element which is provided with a through hole 33 for the inner power supply 15 of the high-pressure discharge lamp, extends into the second chamber 215.
  • a trough 2171 is provided, which is delimited by a hollow cylindrical web 217 , The second end 32 of the contact element forms part of the tank bottom.
  • the well 2171 is filled with an electrically insulating potting compound, so that the weld between the two lamp components 15, 32 is embedded in the potting compound.
  • the recirculated in the base 2 end of the socket remote from the base end of the discharge vessel 11 outer power supply 16 extends into the hollow cylindrical web 218, which is also formed on the base outer part 21.
  • Further hollow-cylindrical webs 219 serve for fastening the cover 22 and for fastening the connection socket 40, which forms the electrical connection of the high-pressure discharge lamp.
  • the end of the web 218 is provided with a mounting surface 2181 for a mounting board (not shown), the shape of which is matched to the cross section of the second chamber 215.
  • the mounting board closes after mounting the chamber 215.
  • a plurality of grooves 2142, 2131 or guide webs for the ignition transformer 1000 are arranged in the side walls 2151, 213 of the first chamber 214 . These grooves 2142, 2131 or guide webs or matched to the housing of the ignition transformer 1000, so that the position of the ignition transformer 1000 in the first chamber 214 is determined by.
  • a nub 2144 which, together with the first end 31 of the contact element and the ignition voltage output of the transformer 1000 mounted thereon, determines the installation depth of the ignition transformer 1000.
  • the ignition voltage output of the ignition transformer is welded to this end 31.
  • the ends of the primary winding are each connected to a conductor track of the mounting board.
  • the ignition transformer 1000 is seated on the nub 2144 serving as a spacer.
  • the space between the ignition transformer 1000 and the side walls 2151, 213 of the first chamber 214 is filled with an electrically insulating potting compound.
  • the lid 22 covers the mounting board and closes both chambers 214, 215 of the base outer part 21st
  • FIG. 3 schematically a circuit diagram of a pulse ignition device is shown, the components 61, 62, 1000 are arranged in the lamp base 2.
  • the pulse ignition device is supplied by a voltage converter with a DC voltage U DC , which charges the ignition capacitor 61 to the breakdown voltage of the spark gap 62 connected in parallel to the ignition capacitor 61 via the ohmic resistor 60.
  • the breakdown voltage of the spark gap 62 is 800 V.
  • the ignition capacitor 61 discharges via the primary winding 1001 of the ignition transformer 1000.
  • the secondary winding 1002 of the ignition transformer 1000 thereby high voltage pulses are induced leading to the ignition of the gas discharge in the high pressure discharge lamp La.
  • the high-pressure discharge lamp La is generated by means of a voltage converter from the vehicle electrical system voltage of the motor vehicle, an AC voltage U AC for operation of the high-pressure discharge lamp. Since the secondary winding 1002 in Series is connected to the discharge path of the high pressure discharge lamp, the secondary winding 1002 is traversed by the lamp current after completion of the ignition phase of the high pressure discharge lamp La.
  • FIGS. 4 to 7 and 10 Different versions of the arranged in the lamp base 2 and base outer part 21 ignition transformer are shown.
  • FIG. 4 schematically represent two views of the ignition transformer 1000 according to the first embodiment.
  • the ignition transformer 1000 has a cylindrical first core member 1004 of oval cross-section, on which the secondary winding 1002 of the ignition transformer 1000 is wound.
  • a bobbin 1003 made of plastic is arranged, on which the primary winding 1001 of the ignition transformer 1000 is wound.
  • the bobbin 1003 surrounds the first core component 1004 and the secondary winding 1002 wound thereon.
  • the core of the ignition transformer 1000 is formed by the first core component 1004 and three further core components 1005, 1006, 1007, which are joined together by means of adhesive 1008 to form a frame, which is only through the filled with adhesive 1008 column is interrupted.
  • the core components 1004 to 1007 are formed as ferrites.
  • the numerical values with arrows in FIG. 4 give the dimensions of the corresponding parts of ignition transformer 1000 in millimeters.
  • the gaps filled with adhesive 1008 are dimensioned such that the sum of their width is 0.1 mm. On average, therefore, each gap measures only 0.025 mm.
  • the secondary winding 1002 has 135 turns and the primary winding 1001 has 3 turns.
  • the DC resistance of the secondary winding 1002 is 0.48 ohms.
  • the secondary winding 1002 has an inductance of 1.4 mH.
  • the three core components 1005, 1006 and 1007 can also be formed as a one-piece, U-shaped ferrite component, so that only between the first core member 1004 and the respective U-leg, a gap filled with adhesive 1008 is present.
  • FIG. 5 schematically represent two views of the ignition transformer 2000 according to the second embodiment.
  • the ignition transformer 2000 has a cylindrical first core component 2004 with an oval cross-section, on which the secondary winding 2002 of ignition transformer 2000 is wound.
  • a bobbin 2003 made of plastic is arranged, on which the primary winding 2001 of the ignition transformer 2000 is wound.
  • the bobbin 2003 surrounds the first core component 2004 and the secondary winding 2002 wound thereon.
  • the core of the ignition transformer 2000 is formed by the first core component 2004 and three further core components 2005, 2006, 2007.
  • the core components 2004, 2006, 2007 are assembled by means of adhesive 2008 into a U-shape.
  • the core member 2005 forms the yoke to this U-shape and is separated by one or two air gaps 2009 from the U-shape.
  • the core components 2004 to 2007 form a frame, which is only interrupted by the column filled with adhesive 2008 and the air gap 2009.
  • the core components 2004 to 2007 are designed as nickel-zinc ferrites.
  • the numerical values with arrows in FIG. 5 Indicate the dimensions of the corresponding parts of ignition transformer 2000 in millimeters.
  • the gaps filled with adhesive 2008 are so dimensioned that the sum of their width is 0.05 mm.
  • the two air gaps 2009 have a width of 0.8 mm each.
  • the secondary winding 2002 has 135 turns and the primary winding 2001 has 4 turns.
  • the DC resistance of the secondary winding 2002 is 0.48 ohms.
  • the secondary winding 2002 has an inductance of 0.9 mH.
  • the cohesion of the transformer core is ensured, for example, by means of a housing which surrounds the entire transformer 2000, or by means of holders for the yoke 2005 attached to the coil body 2003 or by means of a potting compound arranged in the chamber 214 of the lamp base 2.
  • the metallic shielding housing (not shown), which surrounds the base part 21, preferably has an opening in order to reduce the interaction of the magnetic field lines emerging from the air gaps 2009 with the shielding housing.
  • FIG. 6 schematically represent two views of the ignition transformer 3000 according to the third embodiment.
  • the ignition transformer 3000 has a first, substantially U-shaped core component 3004.
  • a U-leg of the first core component 3004, on which the secondary winding 3002 of the ignition transformer 3000 is wound, has an oval cross-section. He is cylindrical.
  • a bobbin 3003 made of plastic, on which the primary winding 3001 of the ignition transformer 3000 is wound.
  • the bobbin 3003 surrounds the aforementioned cylindrical U-leg of the first core member 3004 and the secondary winding 3002 wound thereon.
  • the core of the ignition transformer 3000 is formed by the U-shaped first core member 3004 and the second core member 3005 formed as a yoke, which by means of adhesive 3008 to a frame, which is interrupted only by the two filled with adhesive 3008 column.
  • the core components 3004 and 3005 are formed as ferrites.
  • the numerical values with arrows in FIG. 6 Indicate the dimensions of the corresponding parts of ignition transformer 3000 in millimeters.
  • the gaps filled with adhesive 3008 are dimensioned such that the sum of their width is 1 mm. On average, therefore, each gap measures only 0.5 mm.
  • the secondary winding 3002 has 135 turns and the primary winding 3001 has 3 turns.
  • the DC resistance of the secondary winding 3002 is 0.48 ohms.
  • FIG. 7 schematically represent two views of the ignition transformer 4000 according to the fourth embodiment.
  • the ignition transformer 4000 has a cylindrical first core member 4004 of oval cross section on which the secondary winding 4002 of the ignition transformer 4000 is wound.
  • a bobbin 4003 made of plastic is arranged, on which the primary winding 4001 of the ignition transformer 4000 is wound.
  • the bobbin 4003 surrounds the first core component 4004 and the secondary winding 4002 wound thereon.
  • the core of the ignition transformer 4000 is formed by the first core component 4004 and three further core components 4005, 4006, 4007, which are joined together by means of adhesive 4008 to form a frame, which only passes through the column filled with adhesive 4008 is broken.
  • the core components 4004 to 4007 are formed as ferrites.
  • the numerical values with arrows in FIG. 7 Indicate the dimensions of the corresponding parts of ignition transformer 4000 in millimeters.
  • the gaps filled with adhesive 4008 are dimensioned such that the sum of their width is 0.1 mm. On average, therefore, each gap measures only 0.025 mm.
  • the secondary winding 4002 has 135 turns and the primary winding 4001 has 3 turns on.
  • the DC resistance of the secondary winding 4002 is 0.48 ohms.
  • the only difference from the first embodiment is the smaller longitudinal dimensions of the ferrites 4005 and 4006.
  • FIG. 10 is schematically illustrated the ignition transformer 5000 according to the fifth embodiment.
  • the ignition transformer 5000 has a cylindrical first core member 5004 of oval cross-section, on which the secondary winding 5002 of the ignition transformer 5000 is wound.
  • a bobbin 5003 made of plastic is arranged, on which the primary winding 5001 of the ignition transformer 5000 is wound.
  • the bobbin 5003 surrounds the first core member 5004 and the secondary winding 5002 wound thereon.
  • the core of the ignition transformer 5000 is formed by the first core member 5004 and another substantially U-shaped core member 5005.
  • the short U-limbs of the second core component 5005 face the ends of the first core component 5004 protruding from the coil body 5003, so that the core components 5004, 5005 form a frame, which is only separated by the two air gaps 5009 between the U-limbs of the second core component 5005 and the ends of the first core member 5004 is interrupted.
  • the core components 5004 and 5005 are formed as ferrites.
  • the numerical values with arrows in FIG. 7 Indicate the dimensions of the corresponding parts of ignition transformer 5000 in millimeters.
  • the two air gaps 5009 have a width of 2 mm each.
  • the secondary winding 5002 has 135 turns and the primary winding 5001 has 4 turns.
  • the DC resistance of the secondary winding 5002 is 0.48 ohms.
  • the bobbin 5003 is provided with four spring-shaped, clip-like brackets 5010 for the second core member 5005, the free ends of which are angled.
  • the four brackets 5010 allow for fixing the core member 5005 by means of a snap mechanism.
  • nubs are provided on the brackets, so that the base of the U-shaped core member 5005 at each bracket between its hook-shaped end and the respective knob is held.
  • the ignition transformer 8000 has a cylindrical first core member 8004 of oval cross-section on which the secondary winding 8002 of the ignition transformer 8000 is wound. Above the secondary winding 8002, a bobbin 8003 made of plastic is arranged, on which the primary winding 8001 of the ignition transformer 8000 is wound. The bobbin 8003 surrounds the first core member 8004 and the secondary winding 8002 wound thereon.
  • the core of the ignition transformer 8000 is formed by the first ferrimagnetic core member 8004 and three other core members 8005, 8006, 8007 formed as ferrite plates.
  • the ferrite plates 8005 and 8006 are fixed by means of guide pins or guide strips 8010 on the two opposite lateral inner walls of the chamber 20 'in the lamp base, in which the first core member 8004 is arranged with the transformer coils 8001, 8002 and the coil body 8003 thereon.
  • the transformer 8000 is only completely assembled ( FIG. 8 , Picture on the right). The installation height of the transformer 8000 is determined by the brackets 8011.
  • the core components 8004 to 8007 form a frame, which is interrupted only by narrow, filled with potting compound or air column.
  • FIG. 9 7 is schematically illustrated the seventh embodiment of the ignition transformer 9000 and the chamber 20 "in the lamp base for the ignition transformer 9000.
  • the ignition transformer 9000 has a cylindrical first core member 9004 of oval cross section on which the secondary winding 9002 of the ignition transformer 9000 is wound
  • a bobbin 9003 made of plastic is wound on which the primary winding 9001 of the ignition transformer 9000.
  • the bobbin 9003 surrounds the first core member 9004 and the secondary winding 9002 wound thereon.
  • the core of the ignition transformer 9000 is formed by the first ferrimagnetic core member 8004 and a U-shaped, filled with ferrite powder 9005 cavity formed. This cavity 9005 extends over two opposite side walls and the bottom of the chamber 20 ", in which the first, equipped with the transformer windings 9001, 9002 core member 9004 is arranged.
  • FIG. 11 schematically represent two views of the ignition transformer 6000 according to the sixth embodiment.
  • the ignition transformer 6000 has a cylindrical first core member 6004 of oval cross-section on which the secondary winding 6002 of the ignition transformer 6000 is wound.
  • a bobbin 6003 made of plastic is arranged, on which the primary winding 6001 of the ignition transformer 6000 is wound.
  • the bobbin 6003 surrounds the first core component 6004 and the secondary winding 6002 wound thereon.
  • the core of the ignition transformer 6000 is formed by the first core component 6004 and two further core components 6006, 6007.
  • the core components 6004, 6006, 6007 are joined by means of adhesive 6008 to form a U-shape.
  • the core components 6004, 6006, 6007 are formed as nickel-zinc ferrites.
  • the numerical values with arrows in FIG. 11 Indicate the dimensions of corresponding parts of the ignition transformer 6000 in millimeters.
  • the gaps filled with 6008 adhesive are such that the sum of their widths is 0.05 mm.
  • the air gap 6005 between the free end of the first core member 6004 and the free end of the third core member 6007 aligned parallel to the first core member 6004 is 3.2 mm.
  • the secondary winding 6002 has 135 turns and the primary winding 6001 has 4 turns.
  • the DC resistance of the secondary winding 6002 is 0.48 ohms.
  • the secondary winding 6002 has an inductance of 0.9 mH.
  • the invention is not limited to the embodiments explained in more detail above.
  • a semicircular core member instead of the U-shaped core member 5005 in FIG. 10 a semicircular core member may be used.
  • core components there are also any other shapes and combinations of core components possible to realize a largely closed transformer core, which is interrupted only by relatively narrow column.
  • the invention is particularly suitable for mercury-free metal halide high pressure discharge lamps used as a light source in vehicle headlamps.
  • the lamp base according to the invention can also be used for other types of high-pressure discharge lamp, in particular for mercury-containing metal halide high-pressure discharge lamps.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

Culot (2) de lampe pour une lampe à décharge à haute pression, qui comporte un transformateur d'allumage (1000) placé dans l'espace interne (214) du culot (2) de lampe et destiné à allumer la décharge de gaz dans la lampe à décharge à haute pression. Ledit transformateur d'allumage (1000) possède un noyau sur lequel sont situés ses enroulements (1001, 1002). Ledit culot de lampe est caractérisé en ce que le noyau est formé d'une première partie structurale (1004) et d'au moins une deuxième partie structurale (1005, 1006, 1007) constituées chacune d'une matière ferromagnétique ou ferrimagnétique et séparées par au moins un entrefer (1008). La première partie structurale (1004) possède un segment cylindrique sur lequel sont placés les enroulements (1001, 1002) du transformateur d'allumage (1000) et les parties structurales (1004, 1005, 1006, 1007) du noyau sont formées de manière telle que le noyau possède, à l'exception de l'entrefer (1008) au moins, une forme fermée.

Claims (15)

  1. Culot de lampe pour une lampe à décharge à haute pression comprenant un transformateur ( 1000 ) d'amorçage disposé à l'intérieur ( 214 ) du culot ( 2 ) de lampe et destiné à amorcer la décharge dans un gaz dans la lampe à décharge à haute pression, dans lequel le transformateur ( 1000 ) d'amorçage a un noyau sur lequel sont disposés des enroulements ( 1001, 1002 ), le noyau étant formé d'une première ( 1004 ) partie de noyau et d'au moins une deuxième partie de noyau ( 1005, 1006, 1007 ) qui sont séparées par au moins un intervalle ( 1008 ), la première partie de noyau ( 1004 ) ayant un segment cylindrique sur lequel les enroulements ( 1001, 1002 ) du transformateur ( 100 ) d'amorçage sont disposés et les parties de noyau ( 1004, 1005, 1006, 1007 ) étant conformées de manière à ce que la au moins une deuxième partie de noyau ( 1005, 1006, 1007 ) enjambe le segment de la première partie de noyau ( 1004 ) qui est muni des enroulements ( 1001, 1002 ) et ménage un retour magnétique d'une première extrémité de la première partie de noyau ( 1004 ) à une deuxième extrémité de la première partie de noyau ( 1004 ),
    caractérisé en ce que les parties de noyau ( 1004, 1005, 1006, 1007 ) sont respectivement en un matériau ferrimagnétique ou ferromagnétique et dans le au moins un intervalle ( 1008 ) est disposée une colle pour relier les au moins deux parties de noyau ( 1004, 1005, 1006, 1007 ), qui a un indice de perméabilité plus petit que celui du matériau ferrimagnétique ou ferromagnétique des parties de noyau ( 1004, 1005, 1006, 1007 ).
  2. Culot de lampe suivant la revendication 1, caractérisé en ce que les parties de noyau ( 6004, 6006, 6007 ) sont disposées en forme de U.
  3. Culot de lampe suivant la revendication 1, caractérisé en ce que les parties de noyau ( 1004, 1005, 1006, 1007 ) forment un cadre qui n'est interrompu que par le au moins un intervalle ( 1008 ).
  4. Culot de lampe suivant la revendication 1, caractérisé en ce que les parties de noyau sont constituées sous la forme de ferrite de nickel-zinc.
  5. Culot de lampe suivant la revendication 3, caractérisé en ce que le au moins un intervalle ( 1008, 2009 ) a une largeur inférieure ou égale à 4 mm.
  6. Culot de lampe suivant la revendication 1, caractérisé en ce que l'enroulement ( 1002 ) secondaire et l'enroulement ( 1001 ) primaire du transformateur ( 1000 ) d'amorçage sont superposés, l'enroulement ( 1002 ) secondaire étant disposé à l'intérieur et l'enroulement ( 1001 ) primaire à l'extérieur.
  7. Culot de lampe suivant la revendication 1, caractérisé en ce que l'enroulement secondaire à une résistance en courant continu inférieure ou égale à 1 Ohm.
  8. Culot de lampe suivant la revendication 1, caractérisé en ce que la au moins deuxième partie ( 8005 à 8007 ; 9005 ) de noyau est disposée dans une cavité ( 20', 20" ) du culot de lampe.
  9. Culot de lampe suivant la revendication 8, caractérisé en ce que la cavité est disposée dans une paroi ou dans plusieurs parois du culot de lampe qui délimitent une chambre ( 20" ) pour la première partie ( 9004 ) de noyau du transformateur ( 9000 ) d'amorçage.
  10. Culot de lampe suivant la revendication 1, caractérisé en ce que le culot de lampe a des moyens ( 8010, 8011 ) de maintien de la au moins une deuxième partie ( 8005 ) de noyau.
  11. Culot de lampe suivant la revendication 1, caractérisé en ce que le transformateur d'amorçage a un corps ( 5003 ) de bobine entourant le segment cylindrique de la première partie ( 5004 ) de noyau, corps sur lequel est disposé au moins l'un des enroulements ( 5001 ) du transformateur ( 5000 ) d'amorçage, le corps ( 5003 ) de bobine étant doté de moyens ( 5010 ) de maintien de la au moins une deuxième partie ( 5005 ) de noyau.
  12. Culot de lampe suivant la revendication 1, caractérisé en ce que le transformateur d'amorçage a une carcasse dans laquelle est disposée au moins la première partie de noyau, la carcasse étant dotée de moyen de maintien de la au moins une deuxième partie de noyau.
  13. Culot de lampe suivant la revendication 10, 11 ou 12, caractérisé en ce que les moyens ( 5010 ) de maintien de la au moins une deuxième partie ( 5005 ) de noyau comprennent un mécanisme à déclic ou à encliquetage.
  14. Culot de lampe suivant ou plusieurs des revendications 1 à 7, caractérisé en ce qu'à l'intérieur du culot de lampe est disposé un éclateur à étincelles ou un élément à valeur de seuil, qui constitue une partie d'un dispositif d'amorçage par impulsion, la tension de claquage de l'éclateur ( 62 ) à étincelles ou de l'élément à valeur de seuil étant de l'ordre de 400 V à 1500 V et le rapport des nombres de spires de l'enroulement secondaire ( 1002 ) à celui de l'enroulement primaire ( 1001 ) du transformateur ( 1000 ) d'amorçage étant de l'ordre de 10 à 80.
  15. Lampe à décharge à haute pression ayant un culot de lampe suivant l'une ou plusieurs des revendications précédentes.
EP06705908A 2005-02-11 2006-02-06 Culot de lampe pour une lampe a decharge a haute pression et lampe a decharge a haute pression Not-in-force EP1847159B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005008301 2005-02-11
DE102005029001A DE102005029001A1 (de) 2005-02-11 2005-06-21 Lampensockel für eine Hochdruckentladungslampe und Hochdrucksentladungslampe
PCT/DE2006/000180 WO2006084440A1 (fr) 2005-02-11 2006-02-06 Culot de lampe pour une lampe a decharge a haute pression et lampe a decharge a haute pression

Publications (2)

Publication Number Publication Date
EP1847159A1 EP1847159A1 (fr) 2007-10-24
EP1847159B1 true EP1847159B1 (fr) 2011-01-12

Family

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Application Number Title Priority Date Filing Date
EP06705908A Not-in-force EP1847159B1 (fr) 2005-02-11 2006-02-06 Culot de lampe pour une lampe a decharge a haute pression et lampe a decharge a haute pression

Country Status (5)

Country Link
US (1) US7696699B2 (fr)
EP (1) EP1847159B1 (fr)
JP (1) JP2008530740A (fr)
DE (2) DE102005029001A1 (fr)
WO (1) WO2006084440A1 (fr)

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* Cited by examiner, † Cited by third party
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DE202006002888U1 (de) * 2006-02-21 2006-05-04 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampensockel und Lampe mit einem Lampensockel
DE102007025421B4 (de) * 2007-05-31 2009-07-30 Vogt Electronic Components Gmbh Zündtransformator und Zündmodul
CN101469850A (zh) * 2007-12-25 2009-07-01 富士迈半导体精密工业（上海）有限公司 固态照明灯具
DE102008033192A1 (de) * 2008-07-15 2010-01-21 Osram Gesellschaft mit beschränkter Haftung Transformator sowie Lampensockelelement, Lampensockel und Entladungslampe mit einem derartigen Lampensockel
DE102009012087A1 (de) * 2009-03-06 2010-09-09 Hella Kgaa Hueck & Co. Zündtransformator für eine Hochdruckgasentladungslampe
US8991371B2 (en) 2012-05-01 2015-03-31 Delphi Technologies, Inc. Ignition coil
DE102014214433A1 (de) * 2014-07-23 2016-01-28 SUMIDA Components & Modules GmbH Hochspannungskleintransformator mit U-förmigem Kern
HUE039613T2 (hu) 2014-08-04 2019-01-28 Flowil Int Lighting Holding B V Utólagosan beépíthetõ energiatakarékos lámpa integrált gerjesztõtekerccsel és kerámia fém halogén ív lámpával higanygõzlámpák, nagynyomású nátriumgõzlámpák és kvarc fém halogénlámpák helyettesítésére
DE102014224331A1 (de) * 2014-11-28 2016-06-02 SUMIDA Components & Modules GmbH Hochspannungstransformator mit U-förmigem Kern

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GB1176360A (en) * 1967-08-11 1970-01-01 Thorn Electronics Ltd Improvements in Inverter Circuits
US4495446A (en) * 1982-12-27 1985-01-22 General Electric Company Lighting unit with improved control sequence
JPH118140A (ja) * 1997-06-16 1999-01-12 Ngk Spark Plug Co Ltd 高圧トランス
US6232728B1 (en) * 1998-05-08 2001-05-15 Denso Corporation Discharge lamp apparatus
JP2001257085A (ja) * 2000-03-10 2001-09-21 Hitachi Ferrite Electronics Ltd 放電灯起動装置
DE10339587A1 (de) * 2003-08-26 2005-03-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Transformator, Lampensockel mit einem Transformator und Hochdruckentladungslampe

Also Published As

Publication number Publication date
JP2008530740A (ja) 2008-08-07
WO2006084440A1 (fr) 2006-08-17
US20080150448A1 (en) 2008-06-26
EP1847159A1 (fr) 2007-10-24
DE102005029001A1 (de) 2006-08-24
US7696699B2 (en) 2010-04-13
DE502006008705D1 (de) 2011-02-24

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