EP1056315B1 - Circuit for operating AC high pressure discharge lamps for a vehicle - Google Patents
Circuit for operating AC high pressure discharge lamps for a vehicle Download PDFInfo
- Publication number
- EP1056315B1 EP1056315B1 EP00110480A EP00110480A EP1056315B1 EP 1056315 B1 EP1056315 B1 EP 1056315B1 EP 00110480 A EP00110480 A EP 00110480A EP 00110480 A EP00110480 A EP 00110480A EP 1056315 B1 EP1056315 B1 EP 1056315B1
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- European Patent Office
- Prior art keywords
- high pressure
- lamp
- filter
- circuit
- pressure discharge
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- 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
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
- H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions
Definitions
- the invention relates to a circuit for operating an AC high-pressure gas discharge lamp for a motor vehicle, with a control unit, a Superimposed ignitor, a symmetrical lamp filter and one High-pressure gas discharge lamp, the symmetrical lamp filter between the High pressure gas discharge lamp and the superposition ignition is arranged with a filter capacity parallel to the high pressure gas discharge lamp and a choke each in the feed lines to this parallel connection.
- AC high pressure gas discharge lamps as used in motor vehicles, generate a broad EMI spectrum with high intensity in the frequency range of a few megahertz to the gigahertz range. These disorders are in the essentially generated during current commutation. It goes out with every commutation the lamp is short and is re-ignited with increasing voltage, which creates a high-energy glitch every time.
- the invention has for its object to develop a circuit that on the one hand, the interference pulses of the lamp are causally reduced and, on the other hand, the filters the remaining interference pulses sufficiently, the ignition voltage during the Ignition should be reduced as little as possible.
- a filter is used to suppress the lamp, the filter inductances especially extreme during current commutation and during ignition are non-linear.
- the chokes are advantageously designed so that their Inductors during current commutation in the zero crossing of the current very much large and shortly before, and as small as possible during ignition.
- This Inductors are coils with a closed, soft magnetic core (without Air gap), which is a pronounced hysteresis loop with high remanence and has a high coercive force.
- Ring cores made of high-resistance are best Ferrite material (e.g. NiZn ferrites, MnZn ferrites, MgZn ferrites) are suitable.
- Toroidal chokes are used as interference suppression components, especially for thyristor and triac circuits known.
- Such chokes generally have iron or low-resistance ferrite cores to achieve the highest possible inductance values or high To reach saturation levels. This can be an interference suppression up to Frequencies of the FM radio range can be achieved, a uniform Interference suppression of frequencies far beyond this, as required at the beginning but not reachable with it. Therefore, the generally used ones turned out to be Toroidal chokes to solve the task of the invention as not suitable.
- US-A-5 731 666 discloses an integrated magnetic filter, i.e. a Filter that suppresses "common mode” and "differential mode” interference at the same time achieved a single magnetic component that instead of an air gap a leg with low magnetic permeability.
- the coils are like that on the magnetic structure that two non-linear, each over the Magnetic paths extending low-permeable leg arise.
- EP-A-740 492 shows a superimposed ignition device, the secondary winding of which exhibits non-linear behavior.
- each closed design is one for the choke cores Coil core can be used; for cost reasons (manufacturing and winding costs) however, ring cores are particularly advantageous.
- the single figure shows a control device for a high-pressure gas discharge lamp, and an ignitor with an integrated lamp filter.
- the control unit controls and supplies both the high pressure gas discharge lamp (GDL) as well as the primary ignition circuit of the igniter.
- the ignitor is as one Superimposed ignitor executed; the secondary winding of the Ignition transformer (K1) connected in one of the lamp leads.
- the ignitor also has a symmetrical lamp filter, the symmetrical Lamp filter between the high pressure gas discharge lamp (GDL) and the Superposition ignition is arranged and a filter capacity (C1) parallel to High pressure gas discharge lamp (GDL) and a choke (L1, L2) in each Feed lines to this parallel connection.
- the two chokes consist of coils, each on a closed, soft magnetic, high-resistance core with a pronounced hysteresis curve, preferably on Toroidal cores made of high-resistance ferrite are wound.
- the chokes (L1, L2) are designed so that the maximum sum of the two Inductors the magnitude of the inductance of the secondary winding of the Ignition transformer (K1) reached (this is the case when the current through the Inductors just went through zero and the hysteresis loop the Passes through the coercive field strength) and the minimum sum is significantly smaller than that Inductance of the secondary winding of the ignition transformer (K1) is (this is the Fall in the time before the start of commutation and the zero crossing of the Current).
- the cores of the chokes (L1, L2) are saturated and the inductances almost disappear.
- the chokes' cores (L1, L2) have no air gap (not even a distributed one) Air gap as is usual with powder cores).
- Rod core chokes used in such Filter circuits commonly used have an extreme air gap and are therefore very linear.
- the nonlinear filter not only has a particularly good filter property with regard to lamp failures, it even causally reduces their occurrence. This could be shown by first using a high pressure gas discharge lamp without, then with, and then again without the invention Filter arrangement was operated. The from the high pressure gas discharge lamp outgoing interference was largely reduced by the filter. Surprisingly, the high pressure gas discharge lamp also showed up Removal of the filter from the circuit initially only very little interference, the interference pulses but after some time again, in the for a circuit without Filter usual intensity occurred.
- the filter circuit according to the invention advantageously also enables even a dimmed operation of a high pressure gas discharge lamp. Both circuits previously used could AC high pressure gas discharge lamps only for a short time and only a little dimmed (below their nominal power) because they operate in this mode extremely old.
- the filter circuit according to the invention reduces, even when the lamp is dimmed Re-ignition peaks in current commutation to such a low level that the Electrodes are hardly damaged.
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
Die Erfindung betrifft eine Schaltung zum Betreiben einer Wechselstrom-Hochdruckgasentladungslampe für ein Kraftfahrzeug, mit einem Steuergerät, einem Überlagerungszündgerät, einem symmetrischen Lampenfilter und einer Hochdruckgasentladungslampe, wobei das symmetrische Lampenfilter zwischen der Hochdruckgasentladungslampe und der Überlagerungszündung angeordnet ist, mit einer Filterkapazität parallel zur Hochdruckgasentladungslampe und je einer Drossel in den Zuführungsleitungen zu dieser Parallelschaltung.The invention relates to a circuit for operating an AC high-pressure gas discharge lamp for a motor vehicle, with a control unit, a Superimposed ignitor, a symmetrical lamp filter and one High-pressure gas discharge lamp, the symmetrical lamp filter between the High pressure gas discharge lamp and the superposition ignition is arranged with a filter capacity parallel to the high pressure gas discharge lamp and a choke each in the feed lines to this parallel connection.
Eine solche Schaltung kommt in Seriengeräten der Anmelderin seit 1996 zur Anwendung. Gattungsgemäße Schaltungsanordnungen sind auch aus den Druckschriften GB-A- 2 276 714 und der WO-A- 95 28068 bekannt.Such a circuit has been used in the applicant's series devices since 1996 Application. Generic circuit arrangements are also from the GB-A-2 276 714 and WO-A-95 28068 are known.
Wechselstrom-Hochdruckgasentladungslampen wie sie im Kfz eingesetzt werden, erzeugen ein breites EMI-Spektrum mit hoher Intensität im Frequenzbereich von wenigen Megahertz bis in den Gigahertzbereich. Diese Störungen werden im wesentlichen bei der Stromkommutierung erzeugt. Bei jeder Kommutierung verlischt die Lampe kurz und wird mit ansteigender Spannung sofort wiedergezündet, wodurch jedesmal ein energiereicher Störimpuls entsteht.AC high pressure gas discharge lamps as used in motor vehicles, generate a broad EMI spectrum with high intensity in the frequency range of a few megahertz to the gigahertz range. These disorders are in the essentially generated during current commutation. It goes out with every commutation the lamp is short and is re-ignited with increasing voltage, which creates a high-energy glitch every time.
Üblicherweise werden diese Impulse entweder gefiltert oder sie werden abgeschirmt. Die Abschirmung ist eine sehr teure Maßnahme. Die Filterung beeinflußt die Zündbarkeit der Lampe; das Zündgerät muß mehr Energie pro Zündimpuls erzeugen. Dies hat Auswirkung auf die Kosten und die Baugröße des Zündgerätes und indirekt auch auf das Vorschaltgerät, welches bei höherer Zündenergie auch einen höheren Übernahmestrom liefern muß.Usually these pulses are either filtered or shielded. Shielding is a very expensive measure. The filtering affects the Ignitability of the lamp; the igniter needs more energy per ignition pulse produce. This has an impact on the costs and the size of the ignitor and indirectly also on the ballast, which also with higher ignition energy must deliver a higher takeover current.
Bei der bekannten, von der Anmelderin bisher verwendeten Filterschaltung kommen Stabkerndrosseln zur Anwendung, also Spulen mit konstanter Induktivität. Diese Filterschaltung soll für die speziellen Anforderungen der Entstörung von Hochdruckgasentladungslampen weiter verbessert werden. In the known filter circuit previously used by the applicant Rod core chokes for use, i.e. coils with constant inductance. This Filter circuit is designed for the special requirements of interference suppression High pressure gas discharge lamps can be further improved.
Der Erfindung liegt die Aufgabe zugrunde, eine Schaltung zu entwickeln, die einerseits die Störimpulse der Lampe ursächlich reduziert und andererseits die verbleibenden Störimpulse ausreichend filtert, wobei die Zündspannung während des Zündens möglichst wenig reduziert werden soll.The invention has for its object to develop a circuit that on the one hand, the interference pulses of the lamp are causally reduced and, on the other hand, the filters the remaining interference pulses sufficiently, the ignition voltage during the Ignition should be reduced as little as possible.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die beiden Drosseln als Spulen mit jeweils einem eigenen geschlossenen, weichmagnetischen, hochohmigen Ferritkern ausgebildet sind.This object is achieved in that the two chokes as Coils each with their own closed, soft magnetic, high-resistance Ferrite core are formed.
Damit wird zur Entstörung der Lampe ein Filter eingesetzt, dessen Filterinduktivitäten speziell während der Stromkommutierung und während der Zündung extrem nichtlinear sind. Die Drosseln sind dabei vorteilhafterweise so ausgelegt, daß ihre Induktivitäten während der Stromkommutierung im Nulldurchgang des Stroms sehr groß und kurz davor, sowie während der Zündung möglichst klein werden. Diese Induktivitäten sind Spulen mit geschlossenem, weichmagnetischen Kern (ohne Luftspalt), welcher eine ausgeprägte Hystereseschleife mit hoher Remanenz und hoher Koerzitivfeldstärke aufweist. Am besten sind Ringkerne aus hochohmigem Ferritmaterial (z. B.: NiZn-Ferrite, MnZn-Ferrite, MgZn-Ferrite) geeignet.Thus, a filter is used to suppress the lamp, the filter inductances especially extreme during current commutation and during ignition are non-linear. The chokes are advantageously designed so that their Inductors during current commutation in the zero crossing of the current very much large and shortly before, and as small as possible during ignition. This Inductors are coils with a closed, soft magnetic core (without Air gap), which is a pronounced hysteresis loop with high remanence and has a high coercive force. Ring cores made of high-resistance are best Ferrite material (e.g. NiZn ferrites, MnZn ferrites, MgZn ferrites) are suitable.
Ringkerndrosseln sind zwar als Entstörbauteile, vor allem für Thyristor- und Triac-Schaltungen bekannt. Solche Drosseln weisen aber im allgemeinen Eisen- oder niederohmige Ferritkerne auf, um möglichst hohe Induktivitätswerte oder hohe Sättigungswerte zu erreichen. Damit kann zwar ein Entstörung bis zu den Frequenzen des UKW-Rundfunkbereichs erzielt werden, eine gleichmäßige Entstörung weit darüber hinausgehender Frequenzen, wie eingangs gefordert, ist damit aber nicht erreichbar. Daher erwiesen sich die allgemein verwendeten Ringkerndrosseln zur Lösung der erfindungsgemäßen Aufgabenstellung als nicht geeignet.Toroidal chokes are used as interference suppression components, especially for thyristor and triac circuits known. Such chokes generally have iron or low-resistance ferrite cores to achieve the highest possible inductance values or high To reach saturation levels. This can be an interference suppression up to Frequencies of the FM radio range can be achieved, a uniform Interference suppression of frequencies far beyond this, as required at the beginning but not reachable with it. Therefore, the generally used ones turned out to be Toroidal chokes to solve the task of the invention as not suitable.
Aus der EP-A- 891 123 ist bereits ein Überlagerungszündgerät bekannt, welches gleichzeitig die Funktion eines symmetrischen Filters ausübt.From EP-A-891 123 a superimposed ignition device is already known, which simultaneously functions as a symmetrical filter.
Die US-A- 5 731 666 offenbart ein integriertes magnetisches Filter, das heißt ein Filter, das gleichzeitig "common mode"- und "differential mode"-Entstörung mit einem einzigen magnetischen Bauteil erzielt, das anstelle eines Luftspaltes einen Schenkel mit niedriger magnetischer Permeabilität aufweist. Die Spulen sind derartig auf der magnetischen Struktur aufgewickelt, daß zwei nicht lineare, sich jeweils über den nieder-permeablen Schenkel erstreckende, magnetische Wege entstehen.US-A-5 731 666 discloses an integrated magnetic filter, i.e. a Filter that suppresses "common mode" and "differential mode" interference at the same time achieved a single magnetic component that instead of an air gap a leg with low magnetic permeability. The coils are like that on the magnetic structure that two non-linear, each over the Magnetic paths extending low-permeable leg arise.
Die EP-A- 740 492 zeigt ein Überlagerungszündgerät, dessen Sekundärwicklung ein nicht-lineares Verhalten aufweist.EP-A-740 492 shows a superimposed ignition device, the secondary winding of which exhibits non-linear behavior.
Vorteilhafte Ausgestaltungen der erfindungsgemäßen Schaltung sind in den Unteransprüchen genannt.Advantageous embodiments of the circuit according to the invention are in the Subclaims called.
So ist für die Drosselkerne zwar prinzipiell jede geschlossene Bauform eines Spulenkerns einsetzbar; aus Kostengründen (Herstellungs- und Wicklungskosten) sind Ringkerne jedoch besonders vorteilhaft.In principle, each closed design is one for the choke cores Coil core can be used; for cost reasons (manufacturing and winding costs) however, ring cores are particularly advantageous.
Zur hochspannungsfesten Ausbildung der Drosseln ist es vorteilhaft, erstens die Drosselspulen einlagig zu wickeln und zweitens den Kern nicht entlang seines ganzen Umfangs zu bewickeln, damit die Zuleitungen der Drossel nicht zu dicht beieinanderliegen. For the high-voltage-resistant design of the chokes, it is advantageous, first of all Choke coils in one layer and secondly not the core along its over the entire circumference, so that the feed lines of the choke are not too tight lie together.
Im folgenden soll ein Ausführungsbeispiel der erfindungsgemäßen Schaltung anhand der Zeichnung näher erläutert werden.In the following an embodiment of the circuit according to the invention be explained in more detail with reference to the drawing.
Die einzige Figur zeigt ein Steuergerät für eine Hochdruckgasentladungslampe, sowie ein Zündgerät mit integriertem Lampenfilter.The single figure shows a control device for a high-pressure gas discharge lamp, and an ignitor with an integrated lamp filter.
Das Steuergerät steuert und versorgt sowohl die Hochdruckgasentladungslampe (GDL) als auch den primären Zündkreis des Zündgerätes. Das Zündgerät ist als ein Überlagerungszündgerät ausgeführt; hierzu ist die Sekundärwicklung des Zündtransformators (K1) in eine der Lampenzuleitungen geschaltet. Das Zündgerät weist zudem ein symmetrisches Lampenfilter auf, wobei das symmetrische Lampenfilter zwischen der Hochdruckgasentladungslampe (GDL) und der Überlagerungszündung angeordnet ist und eine Filterkapazität (C1) parallel zur Hochdruckgasentladungslampe (GDL) und je eine Drossel (L1, L2) in den Zuführungsleitungen zu dieser Parallelschaltung aufweist. Die beiden Drosseln (L1, L2) bestehen aus Spulen, die auf jeweils einem geschlossenen, weichmagnetischen, hochohmigen Kern mit ausgeprägter Hysteresekurve, und zwar vorzugsweise auf Ringkerne aus hochohmigem Ferrit, gewickelt sind.The control unit controls and supplies both the high pressure gas discharge lamp (GDL) as well as the primary ignition circuit of the igniter. The ignitor is as one Superimposed ignitor executed; the secondary winding of the Ignition transformer (K1) connected in one of the lamp leads. The ignitor also has a symmetrical lamp filter, the symmetrical Lamp filter between the high pressure gas discharge lamp (GDL) and the Superposition ignition is arranged and a filter capacity (C1) parallel to High pressure gas discharge lamp (GDL) and a choke (L1, L2) in each Feed lines to this parallel connection. The two chokes (L1, L2) consist of coils, each on a closed, soft magnetic, high-resistance core with a pronounced hysteresis curve, preferably on Toroidal cores made of high-resistance ferrite are wound.
Die Drosseln (L1, L2) sind so ausgelegt, daß die maximale Summe der beiden Induktivitäten die Größenordnung der Induktivität der sekundären Wicklung des Zündtransformators (K1) erreicht (dies ist dann der Fall, wenn der Strom durch die Induktivitäten gerade durch Null gegangen ist und die Hystereseschleife die Koerzitivfeldstärke durchläuft) und die minimale Summe deutlich kleiner als die Induktivität der sekundären Wicklung des Zündtransformators (K1) ist (dies ist der Fall in der Zeit vor dem Beginn der Kommutierung und dem Nulldurchgang des Stroms). Während der Zündung sind die Kerne der Drosseln (L1, L2) gesättigt und die Induktivitäten verschwinden annähernd.The chokes (L1, L2) are designed so that the maximum sum of the two Inductors the magnitude of the inductance of the secondary winding of the Ignition transformer (K1) reached (this is the case when the current through the Inductors just went through zero and the hysteresis loop the Passes through the coercive field strength) and the minimum sum is significantly smaller than that Inductance of the secondary winding of the ignition transformer (K1) is (this is the Fall in the time before the start of commutation and the zero crossing of the Current). During the ignition, the cores of the chokes (L1, L2) are saturated and the inductances almost disappear.
Die Kerne der Drosseln (L1, L2) weisen keinen Lufspalt auf (auch keinen verteilten Luftspalt wie er bei Pulverkernen üblich ist). Stabkerndrosseln, die in solchen Filterschaltungen üblicherweise eingesetzt werden, haben einen extremen Luftspalt und sind daher sehr linear.The chokes' cores (L1, L2) have no air gap (not even a distributed one) Air gap as is usual with powder cores). Rod core chokes used in such Filter circuits commonly used have an extreme air gap and are therefore very linear.
Das nichtlineare Filter hat nicht nur eine besonders gute Filtereigenschaft bezüglich der Lampenstörungen, es reduziert sogar ursächlich ihre Entstehung. Dieses konnte gezeigt werden, indem eine Hochdruckgasentladungslampe zunächst ohne, danach mit, und anschließend nochmals ohne die erfindungsgemäße Filteranordnung betrieben wurde. Die von der Hochdruckgasentladungslampe ausgehenden Störungen wurden durch das Filter weitgehend reduziert. Überraschenderweise zeigte die Hochdruckgasentladungslampe auch nach Herausnahme des Filters aus der Schaltung zunächst nur sehr geringe Störungen, wobei die Störimpulse aber nach einiger Zeit erneut, in der für eine Schaltung ohne Filter üblichen Intensität auftraten.The nonlinear filter not only has a particularly good filter property with regard to lamp failures, it even causally reduces their occurrence. This could be shown by first using a high pressure gas discharge lamp without, then with, and then again without the invention Filter arrangement was operated. The from the high pressure gas discharge lamp outgoing interference was largely reduced by the filter. Surprisingly, the high pressure gas discharge lamp also showed up Removal of the filter from the circuit initially only very little interference, the interference pulses but after some time again, in the for a circuit without Filter usual intensity occurred.
Dieses deutet darauf hin, daß die erfindungsgemäß ausgebildete Filterschaltung reversible Veränderungen an der Hochdruckgasentladungslampe (vermutlich an den Elektroden) bewirkt, welche zu einer verringerten Abstrahlung von Störungen führen. Die genauen physikalischen Hintergründe dieses überraschenden Effektes sind bisher noch nicht bekannt.This indicates that the filter circuit designed according to the invention reversible changes to the high pressure gas discharge lamp (presumably to the Electrodes), which lead to a reduced radiation of interference. The exact physical backgrounds of this surprising effect are not yet known.
Vorteilhafterweise ermöglicht die erfindungsgemäßen Filterschaltung darüber hinaus sogar einen gedimmten Betrieb einer Hochdruckgasentladungslampe. Bei den bisher verwendeten Schaltungen konnten Wechselstrom-Hochdruckgasentladungslampen nur für kurze Zeit und nur wenig gedimmt (unterhalb ihrer Nennleistung) betrieben werden, weil sie in diesem Betrieb extrem altem.The filter circuit according to the invention advantageously also enables even a dimmed operation of a high pressure gas discharge lamp. Both circuits previously used could AC high pressure gas discharge lamps only for a short time and only a little dimmed (below their nominal power) because they operate in this mode extremely old.
Das Altern der Lampe hat zwei Gründe:
Im Kraftfahrzeugen ist es jedoch wünschenswert, bei sehr hohen Umgebungstemperaturen die Lampenbetriebsleistung zu reduzieren, um das Steuergerät vor Überhitzung und damit vor Zerstörung zu bewahren. Eine weitere wünschenswerte Anwendung von gedimmten Hochdruckgasentladungslampen ist das gedimmte Tagfahrlicht. In motor vehicles, however, it is desirable at very high Ambient temperatures to reduce the lamp operating power to that To protect the control unit from overheating and thus from destruction. Another is a desirable application of dimmed high pressure gas discharge lamps the dimmed daytime running lights.
Die erfindungsgemäße Filterschaltung reduziert, auch bei gedimmter Lampe die Wiederzündspitzen bei der Stromkommutierung auf ein so geringes Maß, daß die Elektroden kaum noch geschädigt werden.The filter circuit according to the invention reduces, even when the lamp is dimmed Re-ignition peaks in current commutation to such a low level that the Electrodes are hardly damaged.
Die Ergebnisse aus Lampenlebensdaueruntersuchungen mit Ringkerndrosseln als Entstörelement zeigen, daß eine Hochdruckgasentladungslampe im gedimmten Betrieb sogar geringer altert als im normalem Betrieb ohne Ringkerndrossel. Dadurch wird der Einsatz von Hochdruckgasentladungslampen nun auch für gedimmtes Tagfahrlicht geeignet. The results of lamp life tests with toroidal chokes as Interference suppressor show that a high pressure gas discharge lamp in the dimmed Operation ages even less than in normal operation without a toroidal choke. As a result, the use of high pressure gas discharge lamps is now also for dimmed daytime running lights suitable.
- C1C1
- Filterkapazitätfilter capacity
- GDLGDL
- (Wechselstrom-) Hochdruckgasentladungslampe(AC) high pressure gas discharge lamp
- K1K1
- Zündtransformatorignition transformer
- L1, L2L1, L2
- Drosselnthrottle
Claims (4)
- Circuit for operating an AC high pressure discharge lamp (GDL) for a vehicle, with a control unit, an overlaying ignition device, a symmetrical lamp filter and a high pressure discharge lamp (GDL), in which the symmetrical lamp filter is between the high pressure discharge lamp (GDL) and the overlaying ignition, with a filter capacity (C1) parallel to the high pressure discharge lamp (GDL) and a throttle (L1, L2) in each of the feed lines to this parallel connection,
characterised by the fact
that both throttles (L1, L2) are coils with their own connected, soft magnetic, high resistance ferrite cores. - Circuit according to claim 1, characterised by the fact that the ferrite cores are torroidal cores.
- Circuit according to claim 1, characterised by the fact that the cores are wound in a single layer.
- Circuit according to claim 2, characterised by the fact that the coils are wound over an angle of 270E maximum.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19924095 | 1999-05-26 | ||
| DE19924095A DE19924095A1 (en) | 1999-05-26 | 1999-05-26 | Circuit for operating an AC high-pressure gas discharge lamp for a motor vehicle |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1056315A2 EP1056315A2 (en) | 2000-11-29 |
| EP1056315A3 EP1056315A3 (en) | 2001-09-12 |
| EP1056315B1 true EP1056315B1 (en) | 2003-07-30 |
Family
ID=7909226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00110480A Expired - Lifetime EP1056315B1 (en) | 1999-05-26 | 2000-05-17 | Circuit for operating AC high pressure discharge lamps for a vehicle |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1056315B1 (en) |
| AT (1) | ATE246439T1 (en) |
| DE (2) | DE19924095A1 (en) |
| ES (1) | ES2203375T3 (en) |
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|---|---|---|---|---|
| US7456583B2 (en) | 2006-09-05 | 2008-11-25 | General Electric Company | Electrical circuit with dual stage resonant circuit for igniting a gas discharge lamp |
| US7460379B2 (en) | 2006-09-05 | 2008-12-02 | General Electric Company | Electrical circuit with voltage multiplier for facilitating ignition of a gas discharge lamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10116254A1 (en) * | 2001-03-31 | 2002-10-02 | Hella Kg Hueck & Co | Headlamp assembly for a high pressure gas discharge lamp in a motor vehicle |
| DE102004042462A1 (en) * | 2004-08-31 | 2006-03-02 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Method for operating a high-pressure discharge lamp, operating device for a high-pressure discharge lamp and high-pressure discharge lamp with an operating device |
| DE102005060797A1 (en) * | 2005-12-16 | 2007-06-28 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Device for improving the electromagnetic compatibility of a high-pressure discharge lamp |
| WO2009049674A1 (en) * | 2007-10-17 | 2009-04-23 | Osram Gesellschaft mit beschränkter Haftung | Electronic ballast and method for operating a discharge lamp |
| US8049432B2 (en) | 2008-09-05 | 2011-11-01 | Lutron Electronics Co., Inc. | Measurement circuit for an electronic ballast |
| DE102008046163A1 (en) | 2008-09-06 | 2010-03-11 | Hella Kgaa Hueck & Co. | Ignition device i.e. superimposed-type ignition device, for igniting alternating current high-pressure gas discharge lamp in motor vehicle, has inductor with high impedance for high-frequency voltage arranged in series to voltage terminal |
| EP2351466B1 (en) * | 2008-11-28 | 2013-01-02 | Osram Ag | Integrated gas discharge lamp with an ignition electronics integrated into the base for generating asymmetrical ignition pulses |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5051665A (en) * | 1990-06-21 | 1991-09-24 | Gte Products Corporation | Fast warm-up ballast for arc discharge lamp |
| DE4310307B4 (en) * | 1993-03-30 | 2004-10-14 | Robert Bosch Gmbh | Headlights for vehicles |
| CA2164511A1 (en) * | 1994-04-06 | 1995-10-19 | Anton Cornelis Blom | Circuit arrangement |
| DE19515511A1 (en) * | 1995-04-27 | 1996-10-31 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Method and circuit arrangement for starting and operating a discharge lamp |
| JPH09129379A (en) * | 1995-11-06 | 1997-05-16 | Koito Mfg Co Ltd | Discharge lamp lighting device |
| US5731666A (en) * | 1996-03-08 | 1998-03-24 | Magnetek Inc. | Integrated-magnetic filter having a lossy shunt |
| IT1293443B1 (en) * | 1997-07-11 | 1999-03-01 | Magneti Marelli Spa | CONTROL DEVICE FOR A GAS DISCHARGE LAMP, PARTICULARLY FOR VEHICLES. |
-
1999
- 1999-05-26 DE DE19924095A patent/DE19924095A1/en not_active Withdrawn
-
2000
- 2000-05-17 ES ES00110480T patent/ES2203375T3/en not_active Expired - Lifetime
- 2000-05-17 EP EP00110480A patent/EP1056315B1/en not_active Expired - Lifetime
- 2000-05-17 DE DE50003068T patent/DE50003068D1/en not_active Expired - Lifetime
- 2000-05-17 AT AT00110480T patent/ATE246439T1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7456583B2 (en) | 2006-09-05 | 2008-11-25 | General Electric Company | Electrical circuit with dual stage resonant circuit for igniting a gas discharge lamp |
| US7460379B2 (en) | 2006-09-05 | 2008-12-02 | General Electric Company | Electrical circuit with voltage multiplier for facilitating ignition of a gas discharge lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE246439T1 (en) | 2003-08-15 |
| EP1056315A2 (en) | 2000-11-29 |
| DE19924095A1 (en) | 2000-11-30 |
| EP1056315A3 (en) | 2001-09-12 |
| DE50003068D1 (en) | 2003-09-04 |
| ES2203375T3 (en) | 2004-04-16 |
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