EP2138017A1 - Schaltanordnung zum betreiben einer niederdruck-gasentladungslampe - Google Patents
Schaltanordnung zum betreiben einer niederdruck-gasentladungslampeInfo
- Publication number
- EP2138017A1 EP2138017A1 EP07728394A EP07728394A EP2138017A1 EP 2138017 A1 EP2138017 A1 EP 2138017A1 EP 07728394 A EP07728394 A EP 07728394A EP 07728394 A EP07728394 A EP 07728394A EP 2138017 A1 EP2138017 A1 EP 2138017A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inductive element
- switch
- gas discharge
- coil
- discharge 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
- 230000001939 inductive effect Effects 0.000 claims abstract description 43
- 238000004804 winding Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 description 16
- 239000003990 capacitor Substances 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 241000282376 Panthera tigris Species 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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
- H05B41/14—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
- H05B41/295—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 with preheating electrodes, e.g. for fluorescent lamps
Definitions
- the invention relates to a switching arrangement for operating a low-pressure gas discharge lamp having a first and a second coil, between which a gas discharge can be formed, in particular a switching arrangement according to the preamble of claim 1.
- such a switching assembly comprises a one ⁇ direction for generating a temporally changing Potenzi- as at a node (ie, a voltage of the node to a reference point, for example to Mas ⁇ s), wherein the node via a first inductive e lement ( Inductance) is connected to the first coil.
- the switching device further comprises a so-called heating circuit, namely a a circuit-forming with the rest of the switchgear ⁇ order semicircle that includes a switch, namely, the semi-circle is used, the first coil to the second coil electrically verbin ⁇ what the case is exactly when the switch is closed.
- the switch is in particular by means of a timing when switching the low-pressure gas discharge lamp, before its ignition, closed ⁇ sen, so that (due to the potential at the node ⁇ point generated) heating current flows over both coils and preheats this. Preheating facilitates nachfol ⁇ quietly be introduced ignition. Ignition is the switch opened, and the first inductive element cooperates with a switched between the first coil and the second coil resonant capacitor : By resonance, a particularly high voltage is generated, namely the ignition voltage. The ignition causes the onset of the gas discharge ⁇ , and in the subsequent operation of the low-pressure gas discharge lamp, the operating voltage is then wesent ⁇ Lich lower than the ignition voltage. During operation, the switch remains permanently open.
- the semi-circle (ie the heating circuit) should themselves have a mög ⁇ lichst low resistance, thus causing as much energy as the heating current heating the filaments.
- the heating circuit thus usually consists only of the switch whose one connection is connected to the first coil via a connecting line and the other connection is connected via a connecting line to the second coil.
- the size of the heating current through the remaining construction is ⁇ parts of the switching arrangement determined. Since, of course, the preheating is subordinate to the ignition and the duration ⁇ operation of the low-pressure gas discharge lamp, the other components of the switching arrangement for ignition and continuous operation, but not optimized for preheating. It therefore often comes in the art to the situation that the heating current is incorrectly dimensioned. A particular disadvantage is when the heating current is too low and thus the preheating time is too long. Presentation of the invention
- patent applica ⁇ such that a way is sawn to define the size of the heating current.
- a second inductive element (inductance) is thus provided in the semicircle.
- the developer of the predetermined switching principle USAGE ⁇ wants and has to select the components of concrete and thereby their properties (catalysts capacities of the condensate, inductances of the inductive elements, etc.) has to select, is through the second inductive element, an additional degree of freedom.
- ge ⁇ sent choice of the inductance of the second inductive E lement can be determined in advance, how large the Schuström is and in particular to ensure that the preheating is not too long.
- the second in ⁇ inductive element is magnetically coupled to the first inductive Ele ⁇ ment, so that the effect of a transformer is achieved. Due to the magnetic coupling, the switching arrangement is stabilized in its operation, the ge ⁇ called sizes of the components can be sensitively set a precisely ⁇ . - A -
- the magneti ⁇ cal coupling looks so that the first and the second in ⁇ inductive element are each provided as a coil on a winding body, on a common winding elements both elements. Each coil is provided by at least one winding. As is customary in coils in the winding body, a core may be provided (from weichmag ⁇ netischem material), which is thus the first and the second inductive element also jointly.
- the second inductive element with the first inductive element is gekop ⁇ pelt exactly pelt that when the switch is open, a part of zwi ⁇ rule of the first and the second coil falling voltage at the second inductive Element drops off.
- the effect of the second inductive Ele ⁇ ment should not be such that the voltage applied to the switch voltage is increased compared to the situation without a second inductive ⁇ ves element, but is reduced. For example, 500 volts of the 1000 volts ignition voltage can drop across the second inductive element, so that then 500 Volt applied to the switch.
- Switches which tolerate an on ⁇ lying voltage of 500 volts are schgüns ⁇ tiger than switches that tolerate an applied voltage of 1000 volts.
- a 600V MOSFET can be used and this is less expensive than the aforementioned 1200V IGBT.
- the second inductive element thus proves to be helpful in the effort to design the switching arrangement cost-effectively.
- FIG. 1 shows a circuit diagram of a switching arrangement according to the invention.
- a low-pressure gas discharge lamp designated by L in the figure has a first coil Wl and a second coil W2.
- the low-pressure gas discharge lamp L is to operate with an AC voltage.
- the switching ⁇ arrangement generates this AC voltage from a DC ⁇ voltage UDC by means of a device for generating a temporally changing potential, which includes a half ⁇ bridge, namely two of a Halbmaschinensteue ⁇ tion HS alternately on and off switches.
- the switches are designed as transistors Tl and T2 with parallel ge ⁇ switched diodes Dl and D2 (so-called free-wheeling diodes).
- the low-pressure gas discharge lamp L In order to achieve the operating state at all, the low-pressure gas discharge lamp L must first be ignited. In order to provide a relatively high ignition voltage, the effect of the resonance is used.
- a resonance capacitor CR is adoptedge ⁇ provides, which is connected in parallel to the path of the gas discharge, that is with a first terminal on the coil Wl and a second terminal on the coil W2 attacks. Together with the first inductive element LIl forms of Re ⁇ R sonanzkondensator an LC resonant circuit that causes the ignition voltage is generated.
- a heating circuit with a switch S legige ⁇ provides. If the switch S is closed, controlled by a time control ZS, a current flows over the entire ⁇ th helices Wl and W2 and heats them up. Erfindungsge ⁇ Telss a second inductive element Ele ⁇ LI2 is now provided in the heating circuit. In the present case this is formed in the same lamp inductor LD as the first inductive element Ele ⁇ LiI.
- the lamp choke may take a winding body to ⁇ surrounding a core, and the first inductive element LIl may include a first number of windings umfas ⁇ sen and the second inductive element LI2 comprise a as shown in the figure connected second number of windings.
- the inductive elements LIl and LI2 are coupled directly to each other magnetically, as is the case with a transformer.
- the second inductive element LI2 affects the size of the heating current, which is a first object of the invention provides ⁇ .
- a second object of the invention is to relieve the switch S at the time of ignition. Without the second inductive element L12, the entire ignition voltage would be applied to the terminals of the switch S, and it must be provided a switch S, which tolerates the entire ignition ⁇ voltage.
- a suitable winding direction of the windings of the first and second inductive elements LIl and LI2 to each other at the second inductive EIe- element LI2 exactly a voltage of that polarity decreases, that the voltage at the switch S is reduced compared to the state without the second inductive element LI2.
- the switch S no longer tolerates the entire ignition ⁇ voltage and can be designed more cost-effective.
- the device shown in the figure for generating a temporally changing potential at the node Kl is only an example. Other embodiments are also conceivable .
- Essence of the invention is the provision of two ⁇ th inductive element LI2 in the heating circuit, which is preferably magnetically gekop ⁇ pelt with the first inductive element LIl.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- General Induction Heating (AREA)
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2007/053937 WO2008128573A1 (de) | 2007-04-23 | 2007-04-23 | Schaltanordnung zum betreiben einer niederdruck-gasentladungslampe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2138017A1 true EP2138017A1 (de) | 2009-12-30 |
| EP2138017B1 EP2138017B1 (de) | 2011-06-15 |
Family
ID=38192782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07728394A Not-in-force EP2138017B1 (de) | 2007-04-23 | 2007-04-23 | Schaltanordnung zum betreiben einer niederdruck-gasentladungslampe |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20100102738A1 (de) |
| EP (1) | EP2138017B1 (de) |
| CN (1) | CN101663923A (de) |
| AT (1) | ATE513450T1 (de) |
| WO (1) | WO2008128573A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009053617A1 (de) * | 2009-11-17 | 2011-05-19 | Osram Gesellschaft mit beschränkter Haftung | Elektronisches Vorschaltgerät und Verfahren zum Betreiben mindestens einer Entladungslampe |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2570780A (en) * | 1947-08-11 | 1951-10-09 | Gen Electric Co Ltd | Circuit for operating electric discharge lamps |
| US3665243A (en) * | 1969-02-27 | 1972-05-23 | New Nippon Electric Co | Discharge-lamp operating device using thyristor oscillating circuit |
| US4238708A (en) * | 1975-01-09 | 1980-12-09 | New Nippon Electric Company, Ltd. | Discharge lamp operating system |
| US4081718A (en) * | 1975-05-20 | 1978-03-28 | Nec Sylvania Corporation | Discharge lamp lighting device using a backswing booster |
| DE4140557A1 (de) | 1991-12-09 | 1993-06-17 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Schaltungsanordnung zum betrieb einer oder mehrerer niederdruckentladungslampen |
| DE59207908D1 (de) * | 1992-09-24 | 1997-02-27 | Knobel Lichttech | Schaltungsanordnung zum Betrieb einer Leuchtstofflampe und zur Messung des Lampenstroms |
| FR2771590B1 (fr) * | 1997-11-21 | 2003-01-03 | Sgs Thomson Microelectronics | Circuit de commande de lampe fluorescente |
| US6731071B2 (en) * | 1999-06-21 | 2004-05-04 | Access Business Group International Llc | Inductively powered lamp assembly |
| DE10053803A1 (de) * | 2000-10-30 | 2002-05-08 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Beleuchtungssystem mit schonender Vorheizung von Gasentladungslampen |
-
2007
- 2007-04-23 EP EP07728394A patent/EP2138017B1/de not_active Not-in-force
- 2007-04-23 US US12/532,158 patent/US20100102738A1/en not_active Abandoned
- 2007-04-23 WO PCT/EP2007/053937 patent/WO2008128573A1/de not_active Ceased
- 2007-04-23 AT AT07728394T patent/ATE513450T1/de active
- 2007-04-23 CN CN200780052677A patent/CN101663923A/zh active Pending
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008128573A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE513450T1 (de) | 2011-07-15 |
| CN101663923A (zh) | 2010-03-03 |
| EP2138017B1 (de) | 2011-06-15 |
| US20100102738A1 (en) | 2010-04-29 |
| WO2008128573A1 (de) | 2008-10-30 |
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