EP1037259A1 - Hochdruckentladungslampe mit Zündhilfe - Google Patents
Hochdruckentladungslampe mit Zündhilfe Download PDFInfo
- Publication number
- EP1037259A1 EP1037259A1 EP00103512A EP00103512A EP1037259A1 EP 1037259 A1 EP1037259 A1 EP 1037259A1 EP 00103512 A EP00103512 A EP 00103512A EP 00103512 A EP00103512 A EP 00103512A EP 1037259 A1 EP1037259 A1 EP 1037259A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ignition
- coupling surface
- lamp according
- discharge vessel
- pressure 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.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
- H01J61/547—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode outside the vessel
Definitions
- the invention is based on a high-pressure discharge lamp according to the preamble of claim 1.
- These are in particular high pressure sodium lamps, especially with one attached to the outside of the ceramic discharge vessel Ignition aid.
- metal halide lamps are also suitable.
- Ignition aids without direct electrical contact to the mains voltage turn on Bimetal dispensed with. Instead, there are axial ignition strips and a closed one Ring used around each electrode. The ignition aid is only capacitive to the Coupled ignition pulse, this coupling of the area of the ignition aid and the Distance between ignition aid and electrode depends. Since they are floating Sodium diffusion is prevented.
- the potential of the ignition aid depends on from the voltage divider, the capacitance between the ignition aid and the Form electrodes. High-resistance, galvanic connections also play a role between the ignition aid and the electrodes due to the finite conductivity of the ceramic and along the ceramics. With a symmetrical structure, the potential of Ignition aid is in the middle between ground and the potential of the ignition pulse. So there is only half the voltage value for the breakdown between Electrode and wall of the discharge vessel are available. The punch can both between the ground electrode and the wall with ignition aid as well as between the high voltage electrode and the wall with ignition aid. Because there is a similar potential difference in both cases.
- the breakthrough is formed in both cases, i.e. both direct and capacitive coupling, equally.
- the Discharge spreads along the ignition aid on the ceramic wall until it finally comes to the breakdown to the second electrode.
- the ignition aid turns up without direct electrical contact to the mains voltage because of the capacitive coupling, a potential between that of the high voltage pulse at the first electrode and the zero potential of the second Electrode.
- the potential difference between the high voltage pulse and the Ignition aid is therefore less than when the ignition aid is at the potential of one of the electrodes. This means that the ignition voltage requirement is not in contact Ignition aid increased significantly.
- the invention dispenses with a closed ring (full circle) around the electrode at the end of the ignition strip.
- an elongated ignition strip is through at the level of each electrode a coupling area widened, so that the capacity that the electrode with the Coupling area forms, is significantly enlarged. This increases the amount of charge considerably that when the ignition pulse is applied between the electrode and the inner surface of the ceramic tube flows, and there is a stronger ionization of the gas.
- the coupling surface has a maximum transverse extent accordingly a central angle ⁇ of at most 180 °, in particular 50 ° to 120 °.
- This construction has compared to the ignition strip with the two conductive rings the advantage of an asymmetrical field strength distribution on the electrode produce. For this reason, the voltage required for a breakdown significantly less than with the symmetrical ring arrangement.
- the second version with the horizontal stripes to avoid the loss of field strength caused by an im Manufacturing process of inclination of the electrodes which cannot be completely excluded can arise: The person responsible for the field strength generated on the electrode minimal distance between the electrode and the transverse stripe increases even with an off-axis Position of the electrode is only insignificant, so that the scatter caused thereby the ignition voltage is reduced.
- an advantageous design of the ignition aid is that the coupling surfaces are formed at both ends of the ignition strip as conductive transverse strips, which extend over less than half the circumference of the discharge tube.
- the electrode advantageously consists of a shaft with a given diameter D. and a wider part, especially a helix or ball, with a larger one Transverse dimension, with the coupling surface attached in the area of the wider part is.
- the coupling surface according to the invention increases the capacity compared to the electrode and creates a particularly powerful spark. It is also significant easier to apply than a full circle. Detailed investigations have shown that with the same size of the area, the required ignition voltage for a full circle is larger than a pitch circle, in particular with a central angle ⁇ of less than 180 °. It can be assumed that the lack of symmetry of this arrangement of Ignition aid and electrode an inhomogeneous field distribution with particularly high peak field strengths on the electrode that causes the peak field strengths of the symmetrical Arrange (with rings) by a few percent (up to 5%). The Larger field strengths make it easier to penetrate and thus the required Ignition voltage lower.
- the coupling surface can preferably be a have square, elliptical or circular area and in particular a Horizontal stripes in the form of a partial circle.
- the ignition aid presented here is simple and inexpensive to manufacture, for example by a screen printing or stamp printing process, without a complex Manipulation or rotating the discharge vessel would be necessary.
- the ignition voltage lower with the same coupling area at the strip ends in Comparison to the state of the art. The reason for this is the inhomogeneity of the electrical Field strength between the coupling surface and the electrode.
- the known annular arrangement because of its radial symmetry overall a lower electric field at the electrode. Accordingly, the created Ignition voltage in the present invention to be lower at the Electrode to generate the field strength required for the breakdown.
- High-pressure discharge lamps in particular include high-pressure sodium lamps or without understanding mercury and metal halide lamps.
- FIG. 1 shows a discharge vessel 1 made of aluminum oxide ceramic for a high-pressure sodium lamp with 70 W power, which has a distance between the two electrodes 2 of 37 mm, with a wall thickness of 0.6 mm and with a xenon filling of 150 mbar Cold filling pressure and sodium.
- a rod-shaped ignition strip 4 of 40 mm in length and with a width B of 0.8 mm is used. Its area F is 32 mm 2 .
- a coupling surface 6 is attached at the level of each electrode 2 transversely to the ignition strip, specifically at the height of the coil 3 pushed onto the shaft 11 of the electrode.
- the ignition voltage of this arrangement (measurements C1, C2 in Table 1) was measured with compared to the prior art, in the one with an identical discharge vessel an ignition aid was dispensed with (measurement A), or only as an ignition aid the ignition strip of the same size was used (measurement B) or additionally annular transverse strip 10 at the end of the ignition strip 4 of the same size according to Figure 2 is placed (measurements D1, D2).
- the dimensions of the systems were chosen so that the coupling area the ignition aid was the same size in both cases.
- the ignition aid is here in all Cases only coupled capacitively.
- the ignition pulse is applied to the first electrode while the second electrode is at zero potential. Measurement results of the ignition aid with pitch circle at the ends are in Table 1 with the other versions from the State of the art compared.
- the result can be interpreted in such a way that with a small coupling area of the transverse strip (4 to 20 mm 2 ) the ignition-promoting effect is so small that no differences between the pitch circle and the ring can be seen. With a larger area (more than 20 mm 2 ) of the transverse strip, the pitch circle is superior to the ring, since the ignition voltage is noticeably reduced.
- Ignition behavior for various auxiliary ignition constructions embodiment Cross stripe area (in mm 2 ) Ignition voltage (in kV)
- D2 Discharge vessel with ignition strips and full circle 65 1.80
- the area of the partial circle 15 is at second end 16 of the ignition strip 4 only half as large as the area of the pitch circle 17 at the first end 18, because at the second end 16 a smaller ignition voltage for the flashover is sufficient after the lamp has ignited at the first electrode. The optical shadowing is therefore less.
- FIG. 5 Another exemplary embodiment is shown in FIG. 5.
- the horizontal stripe not rectangular, but as a circle 20 or as an ellipse 21 (shown in broken lines) shaped. In both cases, the center of the transverse strip 20 or 21 is at the end of the ignition strip 4.
- the horizontal stripe can also be used for special optical requirements be arranged asymmetrically to the ignition strip.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
- Figur 1
- ein Entladungsgefäß für eine Natriumhochdrucklampe, in Seitenansicht (Figur 1a, geschnitten), in Draufsicht (Figur 1b) und im Querschnitt (Figur 1c), wobei die Zündhilfe eine quadratische Kopplungsfläche besitzt;
- Figur 2
- eine Darstellung des Standes der Technik;
- Figur 3
- ein weiteres Ausführungsbeispiel eines Entladungsgefäßes mit Querstreifen an den Enden des Längsstreifens als Kopplungsfläche;
- Figur 4
- ein weiteres Ausführungsbeispiel von Kopplungsflächen;
- Figur 5
- zwei weitere Ausführungsbeispiele von Kopplungsflächen.
Zündverhalten für verschiedene Zündhilfskonstruktionen | ||
Ausführungsform | Fläche des Querstreifens (in mm2) | Zündspannung (in kV) |
A: Entladungsgefäß ohne Zündhilfe | 0 | 2,80 |
B: Entladungsgefäß mit Zündstreifen | 0 | 1,96 |
C1: Entladungsgefäß mit Zündstreifen und Teilkreis | 9 | 1,90 |
D1: Entladungsgefäß mit Zündstreifen und Vollkreis | 9 | 1,90 |
C2: Entladungsgefäß mit Zündstreifen und Teilkreis | 65 | 1,76 |
D2: Entladungsgefäß mit Zündstreifen und Vollkreis | 65 | 1,80 |
Claims (10)
- Hochdrucklampe mit einem keramischen, rohrförmige Entladungsgefäß (1), in dem zwei Elektroden (2) einander gegenüberliegen, wobei außen am Entladungsgefäß (1) eine elektrisch leitende Zündhilfe angebracht ist, dadurch gekennzeichnet, daß die Zündhilfe aus einem achsparallelen Längsstreifen (4) vorgegebener Breite B besteht, dem etwa in Höhe jeder Elektrode (2) eine das Entladungsgefäß (1) umgebende Kopplungsfläche (6;15;17) mit einer maximalen Querausdehnung entsprechend einem Zentriwinkel α von höchstens 180°, insbesondere 50° bis 120°, angesetzt ist.
- Hochdrucklampe nach Anspruch 1, dadurch gekennzeichnet, daß die Kopplungsfläche mindestens 4 mm2 umfaßt.
- Hochdrucklampe nach Anspruch 1, dadurch gekennzeichnet, daß die Kopplungsfläche als ein Querstreifen (6;15;17) mit gegebener Länge und Breite ausgebildet ist.
- Hochdrucklampe nach Anspruch 2, dadurch gekennzeichnet, daß die Kopplungsfläche mindestens etwa so groß ist wie die Fläche F eines das Entladungsgefäß umgebenden Vollkreises der Breite B, insbesondere bis zum Doppelten der Fläche F.
- Hochdrucklampe nach Anspruch 1, dadurch gekennzeichnet, daß die Kopplungsfläche höchstens 70 mm2 umfaßt.
- Hochdrucklampe nach Anspruch 1, dadurch gekennzeichnet, daß die Kopplungsfläche die Gestalt eines Teil- oder Vollkreises (20) oder einer Ellipse (21) hat.
- Hochdrucklampe nach Anspruch 1, dadurch gekennzeichnet, daß die Kopplungsfläche (6;15;17) symmetrisch zum Längsstreifen angeordnet ist.
- Hochdrucklampe nach Anspruch 1, dadurch gekennzeichnet, daß die Kopplungsfläche (6;15;17) jeweils am Ende des Längsstreifens (4) angebracht ist.
- Hochdrucklampe nach Anspruch 1, dadurch gekennzeichnet, daß die Lampe eine Natriumhochdrucklampe ist, insbesondere mit einer Füllung im Entladungsgefäß, die Natrium und Xenon enthält, wobei der Kaltfülldruck des Xenons mindestens 100 mbar beträgt.
- Hochdrucklampe nach Anspruch 1, dadurch gekennzeichnet, daß die Elektrode (2) aus einem Schaft (11) mit gegebenem Durchmesser D und einem Teil (3), insbesondere einer Wendel oder Kugel, mit größerer Querabmessung als der Schaft besteht, wobei die Kopplungsfläche (6) im Bereich des breiteren Teils (3) angebracht ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19911727A DE19911727A1 (de) | 1999-03-16 | 1999-03-16 | Natriumhochdrucklampe mit Zündhilfe |
DE19911727 | 1999-03-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1037259A1 true EP1037259A1 (de) | 2000-09-20 |
EP1037259B1 EP1037259B1 (de) | 2003-10-08 |
Family
ID=7901190
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00103512A Expired - Lifetime EP1037259B1 (de) | 1999-03-16 | 2000-02-18 | Hochdruckentladungslampe mit Zündhilfe |
Country Status (6)
Country | Link |
---|---|
US (1) | US6429588B1 (de) |
EP (1) | EP1037259B1 (de) |
AT (1) | ATE251799T1 (de) |
CA (1) | CA2299788A1 (de) |
DE (2) | DE19911727A1 (de) |
HU (1) | HU224848B1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7038383B2 (en) * | 2004-09-27 | 2006-05-02 | Osram Sylvania Inc. | Ignition aid for high intensity discharge lamp |
DE102004056004A1 (de) * | 2004-11-19 | 2006-05-24 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Hochdruckentladungslampe |
SE0701251L (sv) * | 2007-05-24 | 2008-09-09 | Auralight Int Ab | Högtrycksnatriumlampa |
DE102009029867A1 (de) | 2009-06-22 | 2010-12-23 | Osram Gesellschaft mit beschränkter Haftung | Hochdruckentladungslampe |
US8659225B2 (en) | 2011-10-18 | 2014-02-25 | General Electric Company | High intensity discharge lamp with crown and foil ignition aid |
US8766518B2 (en) | 2011-07-08 | 2014-07-01 | General Electric Company | High intensity discharge lamp with ignition aid |
US20150015141A1 (en) * | 2011-11-17 | 2015-01-15 | Gregory Mirsky | Igniter-less power supply for xenon lamps in an accelerated weathering test apparatus |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2302685A1 (de) * | 1973-01-19 | 1974-07-25 | Constant Trafo Gmbh & Co Kg | Leuchtroehrenanlage mit einer anordnung zum herabsetzen der zuendspannung |
FR2255706A1 (de) * | 1973-12-21 | 1975-07-18 | Heimann Gmbh | |
US4463280A (en) * | 1982-04-15 | 1984-07-31 | General Electric Company | Shaped discharge lamp with starting aid |
US4468591A (en) * | 1982-04-15 | 1984-08-28 | General Electric Company | Shaped discharge lamp with starting aid and starting strip |
EP0592040A1 (de) * | 1992-10-08 | 1994-04-13 | Koninklijke Philips Electronics N.V. | Hochdruckentladungslampe |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9004811U1 (de) * | 1990-04-27 | 1990-07-05 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München | Hochdruckentladungslampe |
US5909082A (en) * | 1997-05-06 | 1999-06-01 | General Electric Company | Starting aid for high intensity discharge lamps |
-
1999
- 1999-03-16 DE DE19911727A patent/DE19911727A1/de not_active Withdrawn
-
2000
- 2000-02-18 AT AT00103512T patent/ATE251799T1/de not_active IP Right Cessation
- 2000-02-18 EP EP00103512A patent/EP1037259B1/de not_active Expired - Lifetime
- 2000-02-18 DE DE50003962T patent/DE50003962D1/de not_active Expired - Lifetime
- 2000-02-24 US US09/511,946 patent/US6429588B1/en not_active Expired - Lifetime
- 2000-02-28 CA CA002299788A patent/CA2299788A1/en not_active Abandoned
- 2000-03-14 HU HU0001151A patent/HU224848B1/hu not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2302685A1 (de) * | 1973-01-19 | 1974-07-25 | Constant Trafo Gmbh & Co Kg | Leuchtroehrenanlage mit einer anordnung zum herabsetzen der zuendspannung |
FR2255706A1 (de) * | 1973-12-21 | 1975-07-18 | Heimann Gmbh | |
US4463280A (en) * | 1982-04-15 | 1984-07-31 | General Electric Company | Shaped discharge lamp with starting aid |
US4468591A (en) * | 1982-04-15 | 1984-08-28 | General Electric Company | Shaped discharge lamp with starting aid and starting strip |
EP0592040A1 (de) * | 1992-10-08 | 1994-04-13 | Koninklijke Philips Electronics N.V. | Hochdruckentladungslampe |
Also Published As
Publication number | Publication date |
---|---|
HU224848B1 (en) | 2006-03-28 |
ATE251799T1 (de) | 2003-10-15 |
HU0001151D0 (en) | 2000-05-28 |
HUP0001151A3 (en) | 2002-12-28 |
HUP0001151A2 (hu) | 2000-09-28 |
CA2299788A1 (en) | 2000-09-16 |
US6429588B1 (en) | 2002-08-06 |
EP1037259B1 (de) | 2003-10-08 |
DE50003962D1 (de) | 2003-11-13 |
DE19911727A1 (de) | 2000-09-21 |
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