EP1336975A2 - Transformateur avec noyau en forme de baquette et culot le comprenant - Google Patents

Transformateur avec noyau en forme de baquette et culot le comprenant Download PDF

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Publication number
EP1336975A2
EP1336975A2 EP03002845A EP03002845A EP1336975A2 EP 1336975 A2 EP1336975 A2 EP 1336975A2 EP 03002845 A EP03002845 A EP 03002845A EP 03002845 A EP03002845 A EP 03002845A EP 1336975 A2 EP1336975 A2 EP 1336975A2
Authority
EP
European Patent Office
Prior art keywords
rod
core transformer
rod core
transformer according
turns
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.)
Withdrawn
Application number
EP03002845A
Other languages
German (de)
English (en)
Other versions
EP1336975A3 (fr
Inventor
Matthias Burkhardt
Herbert Maurizio Cardarelli
Bernhard Röllgen
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.)
TDK Electronics AG
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Epcos AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH, Epcos AG filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP1336975A2 publication Critical patent/EP1336975A2/fr
Publication of EP1336975A3 publication Critical patent/EP1336975A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • 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

Definitions

  • the invention relates to a rod core transformer according to claim 1 and a discharge lamp base with such a rod core transformer and a mercury-free high-pressure discharge lamp for a motor vehicle headlight.
  • the international patent application PCT / EP00 / 02608 with the publication number WO 00/59269 discloses a gas discharge lamp base with an ignition device, which has a toroidal transformer arranged in the base.
  • the toroidal transformer is used to generate the ignition voltage for the gas discharge lamp.
  • the object of the invention to provide a transformer that is used is suitable as an ignition transformer in a lamp base and as small as possible Has loss lines in the windings.
  • the transformer as an ignition transformer for a mercury-free metal halide high-pressure discharge lamp be usable compared to a corresponding one mercury-containing metal halide high-pressure discharge lamp a by approx. 50% reduced burning voltage.
  • the transformer can be designed as a rod core transformer easier to insert into the lamp base using a pick and place machine than for example a toroidal transformer.
  • the rod core transformer according to the invention has several electrically conductive with one another connected secondary windings on at least two rod-shaped, cores arranged parallel to one another with respect to their longitudinal axis are applied, the total resistance of the secondary windings being smaller or is equal to 2 ⁇ .
  • the secondary windings each have several one above the other wound and parallel layers of turns, even with a large one Transmission ratio still a sufficiently high current flow on the secondary side to ensure.
  • the secondary windings arranged on different rod-shaped cores are preferably connected in series. As a result, their induction voltages add up and there is a higher ignition voltage for the discharge lamp on the secondary side of the rod core transformer. If not all secondary windings are required to generate the highest possible induction voltage, some or even all of the secondary windings can be connected in parallel to thereby reducing the overall resistance of the secondary windings.
  • the rod-shaped cores of the transformer according to the invention are advantageously designed as ferrites and in particular as nickel-zinc sintered ferrites.
  • ferrites consist of a sintered nickel-zinc mixed oxide, which has a comparatively high specific electrical resistance of approximately 10 5 ⁇ m.
  • the ferrites can therefore de facto be regarded as electrical insulators. They ensure a high dielectric strength of the rod core transformer and thereby enable the generation of very high induction voltages.
  • the rod core transformer according to the invention has exactly two rod-shaped cores, each with a secondary winding arranged thereon, where each of these secondary windings has 50 to 200 turns.
  • Such one Rod core transformer is spatially compact and has a sufficient Number of turns on the secondary side to have a sufficiently large gear ratio to realize for its use as an ignition transformer.
  • the wire diameter of the secondary windings is advantageously greater than or equal to 0.1 mm and preferably even larger than 0.2 mm to the total resistance of the To keep secondary windings as low as possible.
  • Ignition transformer for generating the ignition voltage for a high-pressure discharge lamp is realizable, which has a small spatial extent, so that it in the base of a high-pressure discharge lamp for a motor vehicle headlight can be used, and its secondary side has a sufficiently low internal resistance also has high-pressure discharge lamps with the rod core transformer comparatively low operating voltage, such as mercury-free metal halide high-pressure discharge lamps, to be able to operate.
  • the secondary side the rod core transformer has such a low resistance that only here low losses occur, even when the secondary windings - as in use common in pulse ignition devices - after the gas discharge has ignited the lamp current flows through in the lamp.
  • the at least one primary winding of the rod core transformer is advantageously arranged such that the magnetic flux in two side by side arranged rod-shaped cores runs in opposite directions.
  • a primary winding is arranged from a ferrite core, wherein the primary windings are connected in parallel.
  • These measures will Stray field of the transformer reduced.
  • rod-shaped at the ends Ferrite cores advantageously arranged ferrite plates, each with two neighboring rod-shaped ferrite cores work together to the stray field of the Curb transformer. This will reduce the losses in the rod core transformer further reduced.
  • the distance of the ferrite plates to the ends of the rod-shaped Ferrite cores can advantageously be varied or adjusted to match the inductance of the transformer according to the invention to the desired value can.
  • the primary winding or the primary windings of the rod core transformer according to the invention advantageously have only 1 to 3 turns in order to make one possible to achieve a large transmission ratio and thus a correspondingly high ratio Allow induction voltage.
  • Rod core transformers are advantageously each in a separate one Housing housed, the housing by a plug connection with each other are connectable. This allows the individual rod-shaped cores to open simply arranged next to each other at a well-defined distance and in front external influences are protected.
  • These housings preferably consist of an electrically insulating material, for example plastic, to ensure sufficient To ensure high voltage resistance of the transformer. From the for the same reason, the cavities in the housing are advantageously with a electrically insulating potting compound filled.
  • the potting compound preferably contains a homogeneously mixed ferrite powder to the inductance of the rod core transformer to improve.
  • the ferrite powder in the casting compound can additionally to the ferrite platelets mentioned above or used instead of these ferrite platelets become. But it is also possible both on the ferrite plates and on the To dispense with ferrite powder in the sealing compound.
  • the preferred exemplary embodiment of the invention shown in FIG. 1 is a rod core transformer 1 with two rod-shaped ferrite cores 2, 3, which are arranged next to one another offset parallel to one another with respect to their longitudinal axis.
  • the ferrite cores 2, 3 each consist of an essentially cuboid nickel-zinc sintered ferrite with an essentially square cross section of 25 mm 2 .
  • the length of the ferrite cores is 31 mm.
  • a 4-layer secondary winding 4, 5 is arranged on each ferrite core 2, 3. Both secondary windings 4, 5 are of completely identical design and are connected in series, so that their induction voltages add up.
  • Each of the four layers 4a, 4b, 4c, 4d and 5a, 5b, 5c, 5d of a secondary winding 4 and 5 is equipped with 110 turns.
  • the four layers 4a, 4b, 4c, 4d and 5a, 5b, 5c, 5d of the secondary windings 4, 5 are shown schematically and only partially in section in FIG.
  • the turns of two adjacent layers are arranged exactly one above the other. This means that, for example, the first turn of the second layer of the secondary winding 4 or 5 is arranged exactly above the first turn of the first layer of the secondary winding 4 or 5.
  • This situation is shown schematically in FIG. The same applies to all other turns of the first and second layers of the secondary winding 4 and 5 and for all adjacent layers of the secondary winding 4 and 5.
  • the four layers 4a, 4b, 4c, 4d of the secondary winding 4 are connected in parallel, so that the in the four layers 4a, 4b, 4c, 4d add partial currents to the total current.
  • the same also applies to the four layers 5a, 5b, 5c, 5d of the secondary winding 5.
  • the secondary windings 4, 5 each consist of a copper wire with a diameter of 0.24 mm. The copper wire is coated with a varnish for its electrical insulation.
  • the two secondary windings 4, 5 are connected in series and have a total resistance of 0.47 Q.
  • a primary winding 6, 7 is also arranged on each ferrite core 2, 3 each have 2 turns.
  • the primary windings 6, 7 are each on the secondary winding 4 or 5 of the corresponding ferrite core 2 or 3 wound.
  • the Primary windings 6, 7 are designed as copper strips.
  • Both ferrite cores 2, 3 and the secondary windings 4, 5 and primary windings 6, 7 attached thereon each in a separate, essentially cuboid housing 8, 9 Plastic housed.
  • the end faces arranged at the ends of the ferrite cores 2, 3 the housing 8, 9 are open.
  • the essentially cuboid housing 8, 9 each have a wall 8a, 9a with a reduced extension in the longitudinal direction. These walls 8a, 9a touch and are connected by a connector 10 connected with each other.
  • the open faces of the essentially cuboid Housings 8, 9 are each closed by means of a plastic cover 12, 13.
  • Plastic cover 12 or 13 is designed such that it is both the same End of the ferrite cores 2, 3 arranged open end face of the housing 8 as well as the of the housing 9 covers.
  • a ferrite plate 14, 15 is arranged at each end of the ferrite core 2, 3, to contain the stray field of the transformer.
  • the ferrite plates 14, 15 are arranged at a predetermined distance from the ends of the ferrite cores 2, 3 set the inductance of the transformer to the desired value.
  • the Cavities between the walls of the housing 8, 9 and the plastic cover 12, 13 and the ferrite cores 2, 3 and the ferrite platelets 14, 15 are electrical with a insulating potting compound 16 filled.
  • the winding sense of the secondary windings 4, 5 and the primary windings 6, 7 is designed so that the magnetic Flow in the parallel arranged ferrite cores 2, 3 in opposite directions runs.
  • the winding start 40 of the first secondary winding 4 and that The winding ends 51 of the second secondary winding 5 are from the housing 8 and 9, respectively led out.
  • the winding end 41 of the first secondary winding 4 is with the Start of winding 50 of the second secondary winding 5 connected.
  • the two connections 17 of the parallel primary windings 2, 3 are also from the Housing 8 and 9 led out.
  • FIG. 2 shows a circuit diagram of an ignition device for a high-pressure discharge lamp shown with the rod core transformer 1 described above.
  • This ignition device is a pulse ignition device which essentially from an ignition capacitor C1, a spark gap F1, a high-resistance one Resistor R1, a bidirectional threshold switch D1 and the windings 4, 5, 6, 7 of the rod core transformer 1.
  • the ignition voltage for the high-pressure discharge lamp is provided.
  • the input terminal J3 is at ground potential.
  • At the input terminal J1 becomes a DC voltage of - 400 V and at the input terminal J2 a DC voltage of + 600 V is provided.
  • the structure of the schematic in Figure 2 The pulse ignition device shown is state of the art and is therefore intended here not explained in more detail.
  • the two primary windings 6, 7 are connected in parallel and arranged in series with the spark gap F1, so that the parallel connection of the two primary windings 6, 7 via the spark gap F1 to the input terminals J1, J2 is connected.
  • the ignition capacitor C1 To ignite those connected to terminals J4, J5 High pressure discharge lamp, the ignition capacitor C1 to the breakdown voltage the spark gap F1 charged.
  • the capacitor then discharges C1 intermittently over the spark gap F1 and the primary windings 6, 7. In the secondary windings 4, 5 this generates a high induction voltage.
  • FIG. 3 shows a cross section through the upper part the base 20 of a high pressure discharge lamp, which is for use in a Motor vehicle headlights is provided.
  • the rod core transformer 1 is in one separate chamber 21 of the base 20 arranged.
  • a second chamber 22 of the Base 20 is a meandering mounting plate 23 arranged with the rest Components F1, R1, D1, C1 of the ignition device and with components 24 of the control gear of the high-pressure discharge lamp.
  • the base 20 On the top the base 20 has a receptacle 25 for the discharge vessel of the high-pressure discharge lamp on.
  • the underside of the base 20 is covered by a cover (not shown) closed and with the electrical connections (not shown) the Lamp equipped.
  • FIG. 4 shows a partially sectioned side view of the upper part of the base 20 and the lamp vessels 26, 27 of the high-pressure discharge lamp mounted in the receptacle 25.
  • This lamp is a mercury-free metal halide high-pressure discharge lamp with an electrical power consumption of approx. 35 W.
  • This lamp has a discharge vessel 26 which is sealed on both sides made of quartz glass, which is surrounded by a glass outer bulb 27 attached to it is.
  • the outer bulb 27 and the discharge vessel 26 are in a known manner in the Recording 25 of the base 20 fixed.
  • Within the discharge vessel 26 are two Electrodes 28, 29 arranged to generate a gas discharge.
  • As a discharge medium serve xenon and metal halides, which are present in vapor form in the discharge.
  • the electrodes 28, 29 are each via a molybdenum foil melt 30, 31 and a power supply 32, 33 with the output terminals J4 and J5 of the ignition device and the components 24 of the operating device.
  • the base 20 is equipped with an adjusting ring 34 which is connected to the receptacle 25 of the base 20 is welded.
  • the ferrite plates 12, 13 can also be in the covers 14, 15 of the housing. But it is also possible to approach the ferrite platelets dispense with and instead mix the casting compound 16 with a ferrite powder homogeneously or even on the ferrite plates and the admixture of the ferrite powder to dispense with the potting compound.
  • the housing 8, 9 can of course also be different Be trained. In particular, it is also possible to use the plastic cover to do without on the end faces.
  • the rod core transformer according to the invention can also have more than two have rod-shaped ferrite cores and secondary windings.
  • the rod core transformer could also have similar rod-shaped ferrite cores, each with one Have secondary winding in two rows one below the other and side by side are arranged. These four secondary windings could be switched in such a way that two secondary windings a first pair of secondary windings connected in series form and the third and fourth secondary windings form a second pair of in Series connected secondary windings form, the two pairs of secondary windings are connected in parallel to the resistance of the secondary side of the Reduce transformer.
  • rod core transformer according to the invention can be used instead of the ferrite cores (2, 3) also rod-shaped cores made of another electrically insulating material, e.g. B. Plastic.
  • the rod core transformer is according to another preferred embodiment the invention is shown schematically.
  • This embodiment differs from the first exemplary embodiment explained above and shown in FIG. 1 only by the design of the primary winding 6 '.
  • the two secondary windings 4, 5 were not shown in an overview in FIG.
  • the secondary windings 4, 5 are the same in this embodiment In the same way as in the first exemplary embodiment explained above, on the rod cores 2 or 3 wrapped.
  • the embodiment shown in Figure 5 has only one primary winding 6 ', which is arranged above the secondary windings not shown in Figure 5.
  • the primary winding 6 ' consists of a copper strip, which alternates around the first Rod core 2 and the second rod core 3 is wound, so that on each rod core 2, 3 two turns of the primary winding 6 'are arranged, the Sense of winding of the turns of the primary winding arranged on the first rod core 2 6 'opposite to the direction of winding on the second rod core 3 arranged turns of the primary winding 6 'is, as shown schematically in Figure 5 is. As a result, an opposite direction is in the rod cores 2 and 3 magnetic flux generated.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
EP03002845A 2002-02-14 2003-02-07 Transformateur avec noyau en forme de baquette et culot le comprenant Withdrawn EP1336975A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10206180 2002-02-14
DE10206180A DE10206180A1 (de) 2002-02-14 2002-02-14 Stabkerntransformator und Lampensockel mit Stabkerntransformator

Publications (2)

Publication Number Publication Date
EP1336975A2 true EP1336975A2 (fr) 2003-08-20
EP1336975A3 EP1336975A3 (fr) 2005-01-05

Family

ID=27618699

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03002845A Withdrawn EP1336975A3 (fr) 2002-02-14 2003-02-07 Transformateur avec noyau en forme de baquette et culot le comprenant

Country Status (8)

Country Link
US (1) US6741156B2 (fr)
EP (1) EP1336975A3 (fr)
JP (1) JP2003264112A (fr)
KR (1) KR20030068464A (fr)
CN (1) CN1256740C (fr)
CA (1) CA2418747A1 (fr)
DE (1) DE10206180A1 (fr)
TW (1) TWI294130B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013000831U1 (de) 2013-01-21 2013-02-14 Osram Gmbh Transformator

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002238454A1 (en) * 2000-12-19 2002-07-01 Vogt Electronic Ag Gas discharge lamp base comprising an ignition device
DE602004012416T2 (de) * 2004-10-19 2009-03-05 Osram Gesellschaft mit beschränkter Haftung Isolieranordnung für elektrische Bauelemente
US20060291216A1 (en) * 2005-06-14 2006-12-28 Blumel Daniel M Apparatus for reducing in size an igniter circuit and assembly
DE102005035745A1 (de) * 2005-07-29 2007-02-01 Siemens Ag Zündschaltung zum Zünden einer Entladungslampe und Verfahren zum Zünden der Entladungslampe
DE102005038043A1 (de) * 2005-08-09 2007-02-15 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampensockel für eine Hochdruckentladungslampe und Hochdruckentladungslampe
CN113871194B (zh) * 2021-09-30 2024-01-12 中国人民解放军国防科技大学 高压脉冲变压器的组合绝缘方法和高压脉冲变压器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03167808A (ja) * 1989-11-28 1991-07-19 Victor Co Of Japan Ltd フライバックトランス
WO2000059269A1 (fr) * 1999-03-26 2000-10-05 Vogt Electronic Ag Culot de lampe a decharge muni d'un dispositif d'amorçage
EP1137017A2 (fr) * 2000-03-22 2001-09-26 Minebea Co., Ltd. Transformateur onduleur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5072158A (en) * 1990-10-16 1991-12-10 Ilc Technology, Inc. Silent lamp igniter
ES2152010T3 (es) * 1995-03-01 2001-01-16 Koninkl Philips Electronics Nv Circuito para encender una lampara de descarga de alta presion.
SE9702217L (sv) * 1997-06-10 1998-12-11 Ultralux Ab Tändtransformator för gasurladdningslampor
DE19962368C1 (de) * 1999-12-23 2001-09-13 Daimler Chrysler Ag Stabzündtransformator für Brennkraftmaschinen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03167808A (ja) * 1989-11-28 1991-07-19 Victor Co Of Japan Ltd フライバックトランス
WO2000059269A1 (fr) * 1999-03-26 2000-10-05 Vogt Electronic Ag Culot de lampe a decharge muni d'un dispositif d'amorçage
EP1137017A2 (fr) * 2000-03-22 2001-09-26 Minebea Co., Ltd. Transformateur onduleur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN Bd. 0154, Nr. 08 (E-1123), 17. Oktober 1991 (1991-10-17) & JP 3 167808 A (VICTOR CO OF JAPAN LTD), 19. Juli 1991 (1991-07-19) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013000831U1 (de) 2013-01-21 2013-02-14 Osram Gmbh Transformator

Also Published As

Publication number Publication date
US6741156B2 (en) 2004-05-25
US20030151375A1 (en) 2003-08-14
EP1336975A3 (fr) 2005-01-05
CN1438661A (zh) 2003-08-27
TWI294130B (en) 2008-03-01
CA2418747A1 (fr) 2003-08-14
KR20030068464A (ko) 2003-08-21
JP2003264112A (ja) 2003-09-19
DE10206180A1 (de) 2003-08-28
TW200304661A (en) 2003-10-01
CN1256740C (zh) 2006-05-17

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