EP1385358A1 - Schaltungsvorrichtung zum Betrieb von Entladungslampen - Google Patents
Schaltungsvorrichtung zum Betrieb von Entladungslampen Download PDFInfo
- Publication number
- EP1385358A1 EP1385358A1 EP03015030A EP03015030A EP1385358A1 EP 1385358 A1 EP1385358 A1 EP 1385358A1 EP 03015030 A EP03015030 A EP 03015030A EP 03015030 A EP03015030 A EP 03015030A EP 1385358 A1 EP1385358 A1 EP 1385358A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- diode
- ignition
- discharge lamp
- circuit
- 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
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Classifications
-
- 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 present invention relates to a circuit device for operating a discharge lamp with an AC generator or pickup device for providing an AC voltage and an ignition voltage generating device connected to the AC voltage generator or recording device is connected and to their Output the discharge lamp can be connected to generate an ignition voltage from the AC voltage. Furthermore, the present invention relates to a corresponding one Method for operating a discharge lamp.
- a high voltage must first be applied to the lamp be applied to ignite the discharge process of the gas in the lamp. Subsequently a continuous operating voltage must be applied to the electrodes of the lamp.
- an electrical supply unit or circuit device can be used, which accomplish both the ignition process and the operating state can or two separate voltage sources, one for the ignition and the other is used for the operation.
- a voltage source that can be used for both states must be able to generate the high voltage for the ignition and then can work permanently with high efficiency during operation.
- the operating frequency for continuous operation is the Lamp limited by its inductance. This is especially true with high pressure lamps, due to the acoustic resonances that occur only in certain frequency windows can be operated, a major limitation. Beyond that Superimposed ignitors due to the necessary winding quality, switching elements (e.g. spark gaps) and capacitors are relatively expensive.
- the object of the present invention is therefore a circuit device and to propose a method that enables an inexpensive operation of a discharge lamp enable with high ignition voltage.
- this object is achieved by a circuit device for operation a discharge lamp with an AC voltage generator or pickup device for providing an AC voltage and an ignition voltage generating device, which are connected to and connected to the AC generator or receiving device the output of which the discharge lamp can be connected to generate an ignition voltage from the AC voltage, the ignition voltage generating device at least one Includes diode connected in parallel to the output of the ignition voltage generating device is.
- the above-mentioned object is achieved by a method for operating a Discharge lamp by providing an AC voltage and generating an ignition voltage from the AC voltage, the ignition voltage being generated by means of a diode, which is arranged parallel to the discharge lamp.
- the parallel to the output of the ignition voltage generating device respectively the discharge lamp switched diode in connection with the output capacity of the AC voltage generator is used to increase the voltage amplitude according to the Effect of a pump circuit.
- a cascade pump circuit that would correspond described a zero-order pump circuit.
- the ignition voltage generating device therefore preferably comprises a cascade circuit first or higher order in series with the diode as a voltage pump circuit.
- cascade circuits depending on the level of their order achieve high voltage increases, which is ultimately due to the quality of the components used or their own losses and the growing with increasing order Time constant is limited.
- a choke coil is connected to limit the current. This allows a current to flow through the reduction in the resistance of the discharge lamp would occur after the ignition process.
- a switch-off unit for switching off the pumping is preferably connected in series with the diode the voltage used after the ignition process.
- This shutdown unit can be inexpensive can be realized by a Zener diode or TVS diode (transient voltage suppressor).
- the nominal voltage of this Zener diode or TVS diode should be greater than the operating voltage the discharge lamp so as not to hinder the burning process or even to prevent.
- the ignition voltage generating device comprises a piezotransformer.
- a conventional AC voltage source e.g. Half-bridge
- a coupling capacitor to generate the supply voltage
- the circuit topology according to the invention thus enables cost-effective operation of discharge lamps with a high ignition voltage, such as, for example, high-pressure discharge lamps for automotive headlights.
- FIG. 1 a first embodiment of the present Invention, which is shown in Figure 1, is at the output of an AC power supply circuit 1 a transformer 2 connected.
- the output terminals of the transformer 2 are connected to the electrodes of a gas discharge lamp 4.
- Between the A diode 3 is connected to the electrodes of the gas discharge lamp.
- the mode of operation of the circuit according to FIG. 1 can correspond to the voltage curve shown in FIG. 6 be removed.
- the AC voltage at the electrodes of the gas discharge lamp without the diode 3 has the sinusoidal voltage curve in the area A from FIG. 6.
- the diode 3 connected in parallel with the electrodes of the gas discharge lamp 3 causes that the AC voltage is raised / lowered to positive or negative values is, so that there is a doubling of the voltage amplitude. Depending on the type of discharge lamp, this double voltage amplitude is sufficient for ignition.
- FIGS. 2 and 3 show alternative embodiments to that in FIG. 1. It the same switching elements or components 1 to 4 are used in each case.
- a shutdown unit with the diode 3, respectively a threshold switch 5 connected.
- the diode 3 is a Zener diode.
- a unidirectional TVS diode can also be used become.
- the Zener diode acts as a threshold switch 5 in the opposite direction switched to diode 3.
- the pump circuit is switched off after reached the breakdown of the lamp, the nominal voltage of the diode, i. H. the Zener tension, must be at least as large as the maximum operating voltage of the lamp.
- the pump function of the Pump circuit of zero order which consists only of the diode 3, switched. Pump circuits of a higher order are shown in connection with FIG. 8.
- the circuit shown in FIG. 3 essentially has the same components, like that of Figure 2.
- the transformer 2 in the circuit of Figure 3 is around an electromagnetic transformer.
- the secondary-side coil becomes simultaneous used as a resonance coil for resonance operation.
- In series with the secondary coil is one Coupling capacitor 6 connected, which is charged by the pump circuit.
- the electrical supply circuit or the gas discharge lamp can be a resonance circuit operated very effectively.
- the Circuit operated without load and the output voltage of the resonance transformer is on highest so that the lamp can be ignited.
- After ignition when the lamp is in operation, its internal resistance decreases, which also reduces the output voltage of the resonance transformer is reduced due to the detuning, so that the gas discharge lamp with a lower voltage value specific to the lamp type can be operated with high efficiency.
- This voltage value must be lower than the value of the forward voltage of the diode 3. If this is not the case, the to the Lamp 4 applied voltage limited to the forward voltage of the diode 3.
- FIG. 4 shows a concrete implementation of the embodiment shown in FIG. 2.
- the Transformer 2 is designed as a piezo transformer.
- the primary side is that of the AC voltage supply or the alternating voltage supplied to the generator 1 converted into mechanical vibrations by the piezoelectric element. This about mechanical vibrations transmitted to the piezoelectric element become secondary converted back into electrical signals.
- This voltage is further increased by the pump circuit with diodes 3 and 5, so that the ignition voltage of the lamp 4 is reached.
- the generator 1 for generating the primary side AC voltage can include a half bridge.
- FIG. 5 shows a further embodiment of the circuit according to the present invention shown.
- the AC voltage generated by the generator 1 is turned off a resonance coil 8 and a resonance capacitor 9 existing series resonance circuit created.
- the voltage at the resonance capacitor 9 is via a coupling capacitor 10 coupled to the lamp 4.
- Coupling capacitor 10 to avoid electrophoresis on the electrodes of the gas discharge lamp 4 should have a sufficiently high capacity for the so-called takeover, i.e. H the transition from glow discharge to arc discharge. If necessary, can A series resonance, possibly with low quality, is arranged in front of the coupling capacitor 10 to reach higher voltages.
- FIG. 7 shows the course of the AC voltage after the discharge lamp has been ignited, i. H. during the burning phase. It can be clearly seen that the amplitude of the AC voltage is reduced compared to that of Figure 6. The reason for this is that the discharge lamp 4 has a significantly lower resistance after ignition, so that the Voltage on it is reduced in the burning phase. Furthermore, FIG. 7 shows that the pump circuit, i.e. H. the diode 3 has no effect during the burning phase, because the signal curve in area A, d. H. when diode 3 is switched off, is identical to the signal curve in area B, d. H. when diode 3 is switched on. The reason for this is the Zener diode 5, through which the pump circuit after the breakdown of the lamp in continuous operation is switched off.
- FIG. 8 shows a variant of the embodiment in FIG. 4.
- the zero-order pump circuit in FIG. 4 is the circuit of FIG. 8 a second-order pump circuit.
- a capacitor C1 is located parallel to the diodes 3 and D1 a capacitor C2 to the diodes D1 and D2, a parallel to the diodes D2 and D3 Capacitor C3, a capacitor C4 parallel to the diodes D3 and D4 and parallel to the Diode D5 a capacitor C5.
- the components of a tier of the cascade are through the Areas I and II marked in Figure 8.
- a peak voltage ⁇ 2x (U ss -Uz).
- a peak voltage ⁇ 3x (U ss -U z ) arises.
- U ss means the peak-to-peak value of the AC voltage on the secondary side of the transformer 2 and U z the Zener voltage.
- FIG. 9 shows the voltage curve at the gas discharge lamp 4 for the inventive Embodiments shown in Figures 2 to 5. After switching on, it turns the final pump voltage very quickly. After ignition, the pumping process switched off and the voltage drops to the burning voltage, as already related was explained with Figures 6 and 7.
- the voltage curve over time in a cascade connection is third Order reproduced.
- the achievable pump voltage is ideally appropriate higher, but the time constant with which this final pump voltage is reached is also significantly higher than for the second-order pump voltage according to FIG. 10. Also according to In this case the final pump value is not reached within 10 ms. For very high ignition voltages This means that this pump technology reaches its natural limit.
- An advantage of the ignition circuit described is that it is generally essential lower breakdown voltage than is required for pulse ignitors because of the voltage time area is bigger here.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
- Figur 1
- ein Prinzipschaltbild der erfindungsgemäßen Schaltungsvorrichtung;
- Figur 2
- ein Prinzipschaltbild einer anderen Ausführungsform der vorliegenden Erfindung;
- Figur 3
- ein Prinzipschaltbild einer weiteren Ausführungsform der vorliegenden Erfindung;
- Figur 4
- ein Schaltbild einer weiteren Ausführungsform der vorliegenden Erfindung;
- Figur 5
- ein Schaltbild einer noch weiteren Ausführungsform der vorliegenden Erfindung;
- Figur 6
- den Spannungsverlauf an den Elektroden einer Gasentladungslampe ohne (A) und mit einer Diode (B) vor der Zündung;
- Figur 7
- den Spannungsverlauf an den Elektroden einer Gasentladungslampe ohne (A) und mit einer Diode (B) während der Brennphase;
- Figur 8
- ein Schaltbild einer bevorzugten Ausführungsform der vorliegenden Erfindung;
- Figur 9
- den Spannungsverlauf an den Elektroden einer Gasentladungslampe, der sich durch eine Pumpschaltung nullter Ordnung gemäß Figur 4 vor der Zündung und nach der Zündung ergibt;
- Figur 10
- den Spannungsverlauf an den Elektroden einer Gasentladungslampe, der sich durch eine Pumpschaltung zweiter Ordnung gemäß Figur 8 vor der Zündung und nach der Zündung ergibt; und
- Figur 11
- den Spannungsverlauf an den Elektroden einer Gasentladungslampe, der sich durch eine Pumpschaltung dritter Ordnung vor der Zündung und nach der Zündung ergibt.
Claims (15)
- Schaltungsvorrichtung zum Betrieb einer Entladungslampe (4) miteiner Wechselspannungsgenerator- oder -aufnahmeeinrichtung (1) zum Bereitstellen einer Wechselspannung undeiner Zündspannungserzeugungseinrichtung, die an die Wechselspannungsgeneratoroder -aufnahmeeinrichtung (1) angeschlossen und an deren Ausgang die Entladungslampe (4) anschließbar ist, zur Erzeugung einer Zündspannung aus der Wechselspannung,
die Zündspannungserzeugungseinrichtung mindestens eine Diode (3) umfasst, die parallel zum Ausgang der Zündspannungserzeugungseinrichtung geschaltet ist. - Schaltungsvorrichtung nach Anspruch 1, wobei die Zündspannungserzeugungseinrichtung eine Kaskadenschaltung (D1 bis D5, C1 bis C5) erster oder höherer Ordnung in Serie zu der Diode (3) als Spannungspumpschaltung umfasst.
- Schaltungsvorrichtung nach Anspruch 2, wobei die Kaskadenschaltung (D1 bis D5, C1 bis C5) pro Ordnung zwei Kondensatoren und zwei Dioden aufweist.
- Schaltungsvorrichtung nach einem der Ansprüche 1 bis 3, die eine Spule (7), welche zwischen den Ausgang der Zündspannungserzeugungseinrichtung und die Diode (3) geschaltet ist, zur Strombegrenzung aufweist.
- Schaltungsvorrichtung nach einem der Ansprüche 1 bis 4, die seriell zu der Diode (3) eine Abschalteinheit (5) zum Abschalten der Zündspannung für den Brennbetrieb der Entladungslampe (4) aufweist.
- Schaltungsvorrichtung nach Anspruch 5, wobei die Abschalteinheit (5) eine Zener-Diode oder eine TVS-Diode aufweist.
- Schaltvorrichtung nach Anspruch 6, wobei die Zenerspannung der Zener-Diode größer oder gleich der maximalen Brennspannung der Entladungslampe (4) ist.
- Schaltungsvorrichtung nach einem der Ansprüche 1 bis 7, wobei die Zündspannungserzeugungseinrichtung einen Piezotransformator (2) aufweist.
- Schaltungsvorrichtung nach einem der Ansprüche 1 bis 7, wobei die Zündspannungserzeugungseinrichtung einen magnetischen Transformator, an den sekundärseitig ein Koppelkondensator (6) angeschlossen ist, aufweist.
- Verfahren zum Betreiben einer Entladungslampe (4) durchBereitstellen einer Wechselspannung undErzeugen einer Zündspannung aus der Wechselspannung,
die Zündspannung mittels einer Diode (3) erzeugt wird, die parallel zu der Entladungslampe (4) angeordnet ist. - Verfahren nach Anspruch 10, wobei die Zündspannung durch eine Kaskadenschaltung (D1 bis D5, C1 bis C5) erster oder höherer Ordnung in Serie zu der Diode (3) als Spannungspumpschaltung erzeugt wird.
- Verfahren nach Anspruch 10 oder 11, wobei der Strom durch die Entladungslampe (4) durch eine Drosselspule (7) begrenzt wird.
- Verfahren nach einem der Ansprüche 10 bis 12, wobei das Pumpen der Zündspannung nach dem Zündvorgang automatisch anhand einer Bauelementekennlinie abgeschaltet wird.
- Verfahren nach einem der Ansprüche 10 bis 13, wobei die Wechselspannung durch einen Piezotransformator (2) erzeugt wird.
- Verfahren nach einem der Ansprüche 10 bis 13, wobei die Wechselspannung durch einen magnetischen Transformator mit nachgeschaltetem Koppelkondensator (6) erzeugt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10233400 | 2002-07-23 | ||
DE10233400A DE10233400A1 (de) | 2002-07-23 | 2002-07-23 | Schaltungsanordnung zum Betrieb von Entladungslampen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1385358A1 true EP1385358A1 (de) | 2004-01-28 |
EP1385358B1 EP1385358B1 (de) | 2010-09-08 |
Family
ID=29796521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03015030A Expired - Lifetime EP1385358B1 (de) | 2002-07-23 | 2003-07-02 | Schaltungsvorrichtung zum Betrieb von Entladungslampen |
Country Status (5)
Country | Link |
---|---|
US (1) | US6914392B2 (de) |
EP (1) | EP1385358B1 (de) |
JP (1) | JP2004055560A (de) |
CA (1) | CA2435296A1 (de) |
DE (2) | DE10233400A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10333729A1 (de) * | 2003-07-23 | 2005-03-10 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Vorschaltgerät für mindestens eine Hochdruckentladungslampe, Betriebsverfahren und Beleuchtungssytem für eine Hochdruckentladungslampe |
DE102004020329A1 (de) * | 2004-04-26 | 2005-11-10 | Epcos Ag | Elektrische Funktionseinheit und Verfahren zu deren Herstellung |
DE102005017108A1 (de) * | 2005-01-26 | 2006-07-27 | Epcos Ag | Piezoelektrisches Bauelement |
CA2606187A1 (en) * | 2005-04-14 | 2006-10-19 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh | Pulsed igniting device comprising a piezoelectric transformer for a high pressure discharge lamp |
DE102010018325A1 (de) * | 2010-04-27 | 2011-10-27 | Automotive Lighting Reutlingen Gmbh | Verfahren und Ansteuerschaltung für den Start einer Gasentladungslampe |
DE102010028222A1 (de) * | 2010-04-27 | 2011-10-27 | Osram Gesellschaft mit beschränkter Haftung | Verfahren zum Betreiben einer Gasentladungslampe und Gasentladungslampensystem |
WO2012139576A2 (en) * | 2011-04-15 | 2012-10-18 | Milan Mancic | Circuit adapted to supply a voltage to an electronic device and uses thereof |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3407334A (en) * | 1966-06-01 | 1968-10-22 | Mc Graw Edison Co | Starting and operating circuit for arc discharge lamps requiring a high starting voltage |
US3963958A (en) * | 1967-10-11 | 1976-06-15 | General Electric Company | Starting and operating circuit for gaseous discharge lamps |
GB2104319A (en) * | 1981-08-25 | 1983-03-02 | Home Electric Company Limited | Fluorescent lamp starter apparatus |
DE4310950A1 (de) * | 1992-04-03 | 1993-11-25 | Hubbell Inc | Verbessertes elektronisches Vorschaltgerät mit geringem Verlust |
US5834907A (en) | 1994-11-16 | 1998-11-10 | Minebea Co., Ltd. | Cold cathode tube operating apparatus with piezoelectric transformer |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4503359A (en) * | 1979-09-12 | 1985-03-05 | Hitachi Lighting, Ltd. | Discharge lamp lighting device |
US5488269A (en) * | 1995-02-10 | 1996-01-30 | General Electric Company | Multi-resonant boost high power factor circuit |
US5962988A (en) * | 1995-11-02 | 1999-10-05 | Hubbell Incorporated | Multi-voltage ballast and dimming circuits for a lamp drive voltage transformation and ballasting system |
US5767631A (en) * | 1996-12-20 | 1998-06-16 | Motorola Inc. | Power supply and electronic ballast with low-cost inverter bootstrap power source |
US5856728A (en) * | 1997-02-28 | 1999-01-05 | Motorola Inc. | Power transformer circuit with resonator |
-
2002
- 2002-07-23 DE DE10233400A patent/DE10233400A1/de not_active Withdrawn
-
2003
- 2003-07-02 EP EP03015030A patent/EP1385358B1/de not_active Expired - Lifetime
- 2003-07-02 DE DE50313061T patent/DE50313061D1/de not_active Expired - Lifetime
- 2003-07-02 US US10/610,647 patent/US6914392B2/en not_active Expired - Fee Related
- 2003-07-16 CA CA002435296A patent/CA2435296A1/en not_active Abandoned
- 2003-07-18 JP JP2003276494A patent/JP2004055560A/ja active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3407334A (en) * | 1966-06-01 | 1968-10-22 | Mc Graw Edison Co | Starting and operating circuit for arc discharge lamps requiring a high starting voltage |
US3963958A (en) * | 1967-10-11 | 1976-06-15 | General Electric Company | Starting and operating circuit for gaseous discharge lamps |
GB2104319A (en) * | 1981-08-25 | 1983-03-02 | Home Electric Company Limited | Fluorescent lamp starter apparatus |
DE4310950A1 (de) * | 1992-04-03 | 1993-11-25 | Hubbell Inc | Verbessertes elektronisches Vorschaltgerät mit geringem Verlust |
US6166492A (en) | 1992-04-03 | 2000-12-26 | Hubbell Incorporated | Low loss, electronic ballast |
US5834907A (en) | 1994-11-16 | 1998-11-10 | Minebea Co., Ltd. | Cold cathode tube operating apparatus with piezoelectric transformer |
Also Published As
Publication number | Publication date |
---|---|
CA2435296A1 (en) | 2004-01-23 |
EP1385358B1 (de) | 2010-09-08 |
US20040051480A1 (en) | 2004-03-18 |
DE10233400A1 (de) | 2004-02-12 |
JP2004055560A (ja) | 2004-02-19 |
DE50313061D1 (de) | 2010-10-21 |
US6914392B2 (en) | 2005-07-05 |
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