EP1243165B1 - Schaltungsanordnung zum betreiben einer gasentladungslampe - Google Patents
Schaltungsanordnung zum betreiben einer gasentladungslampe Download PDFInfo
- Publication number
- EP1243165B1 EP1243165B1 EP00974462A EP00974462A EP1243165B1 EP 1243165 B1 EP1243165 B1 EP 1243165B1 EP 00974462 A EP00974462 A EP 00974462A EP 00974462 A EP00974462 A EP 00974462A EP 1243165 B1 EP1243165 B1 EP 1243165B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frequency
- switch
- switches
- mhz
- circuitry arrangement
- 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.)
- Expired - Lifetime
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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
- H05B41/14—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
- H05B41/282—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
- H05B41/2825—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 by means of a bridge converter in the final stage
- H05B41/2828—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 by means of a bridge converter in the final stage using control circuits for the switching elements
-
- 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
- H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2988—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal operating conditions
Definitions
- the present invention relates to a circuit arrangement for operating a Gas discharge lamp, in particular a low-pressure discharge lamp, according to the Preamble of claim 1.
- Gas discharge lamps usually with high frequencies in a range from 20 to 50 kHz operated. At these frequencies, the electron density in the plasma can Fluorescent lamp no longer follow the time course of the current, so that one in the sets a substantially constant average electron density over time. In this case If there is a zero crossing of the mains supply, there is no longer a current gap to reignite the lamp, so that compared to lamp operation in the usual mains frequency of 50 Hz with a constant luminous flux a reduction of the electrical power consumed can be achieved by 8 to 10%.
- a circuit arrangement, on the one hand, high-frequency lamp operation realized and secondly to a relatively limited extent high-frequency Alternating fields generated is described in WO 86/04752.
- the lamp is in a full bridge circuit comprising four controllable switches arranged and such controlled that in a first operating phase, two diagonally opposite Switches are opened while one of the two switches is the second Bridge diagonal is permanently closed and the other is clocked at high frequency. During this time the lamp is essentially in the same direction from the current traversed.
- the lamp is started with an AC voltage operated, the amplitude of which is greater than the amplitude of the low-frequency Voltage signal in normal operation and its frequency less than or equal to the second Is high frequency.
- the lamp will start with a strong short-term Radio frequency signal operated while after ignition with a low frequency switched DC voltage is driven only by the high frequency is superimposed. In this way, a much better and gentler Lamp start achieved.
- the values are very low adjustable radiation ensures that no health Impairment of people in the area, because that High frequency signal superimposed on the lamp direct current accordingly. Further is by periodically switching the lamp current with a low frequency for example in the mHz to Hz range, ensures that the electrodes Wear evenly and no uneven coloring or blackening of the lamps occurs at one end.
- the result is as further advantage that the capacitance and inductance values of some in the Circuitry used components can be reduced so that instead integration of these is possible using discrete components.
- passive components such as chokes and capacitors, for example Be part of a series resonance circuit arranged in the bridge branch can, or transformers lend themselves to integration, so that a clear Reduction in dimensions of the entire circuit can be achieved.
- the Integration of the components can, for example, in the context of a multilayer Printed circuit board.
- the multilayer circuit is preferably implemented by a LTCC (Low Temperature Cofired Ceramic) structure realized, which consists of several low-sintering ceramic layers or foils arranged one above the other, between which there are conductor tracks, capacitive dielectric layers or the like.
- LTCC Low Temperature Cofired Ceramic
- a rectifier circuit 1 for example a bridge rectifier or the like, forms the input of the ballast shown in FIG. 1 connected to the AC line voltage u n .
- a storage capacitor between the positive output of the rectifier circuit 1 and the input of the full bridge circuit functioning electrolytic capacitor C s .
- the full bridge circuit comprises four controllable switches S1 to S4, which for example are formed by MOS field effect transistors.
- the bridge branch between the The gas discharge lamp LA is located at the center taps of the two half bridges which is, in particular, a low-pressure discharge lamp.
- the bridge branch has a series resonance circuit consisting of an inductor L and one Resonance capacitor C1 arranged, the low pressure discharge lamp LA and the resonance capacitor C1 are connected in parallel. Activate the four switches S1 to S4 is carried out by a control circuit, not shown.
- the circuit arrangement shown in Fig. 1 can by in a known manner Monitoring circuits, which lamp operating parameters - for example the Lamp voltage and lamp current - record and depending on the control influence the switch or the lamp. That would also be Detection of lamp defects or the like possible.
- Such circuit extensions are not the subject of the present invention and are therefore not intended to continue be taken into account.
- the frequency f3 is preferably above 1 MHz, particularly advantageously in the range between 2.2 MHz and 3.0 MHz. Since gas discharge lamps are extremely ignitable at these frequencies, the electrodes of the lamp LA may not need to be preheated. However, it can be advantageous if the frequency f3 of the clock signal for the switches S1 and S2 for starting the lamp LA is lowered in the direction of the resonance frequency of the series resonance circuit.
- the four switches S1 to S4 are activated in normal operation.
- a first state T 1 the two switches S2 and S3 of the one bridge diagonal are permanently opened, while the switch S1 is permanently closed and the switch S4 is clocked at high frequency.
- the switching frequency f2 for the switch S4 is preferably between 2.2 MHz and 3.0 MHz, for example approximately 2.65 MHz, and is the same as or higher than the frequency f3.
- the control circuit then changes to a second state T 2 , in which the two switches S1 and S4 of the previously clocked bridge diagonal are now opened, while switch S3 is now closed and switch S2 is also clocked at high frequency f2.
- the change between the two states T 1 and T 2 takes place at a very low frequency f1.
- the lamp voltage U LA also shown in FIG. 3 results.
- the high frequency f2 is preferably in the megahertz range, while the switching frequency f1 can be, for example, 50 Hz and even significantly less - up to a few mHz.
- the switching frequency f1 can be, for example, 50 Hz and even significantly less - up to a few mHz.
- U 1 is lower than the ignition voltage U 3 .
- the high-frequency signal components for the environmental compatibility of the lamp ballast system must be observed in the first place, a health impairment can be excluded. Otherwise, the starting phase T s is only very short, so that the cause of complaints can also be excluded here.
- chokes and capacitors with relatively low capacitance and inductance values can be used for the series resonant circuit.
- Such multilayer circuits which consist of a plurality of low-sintering ceramic layers arranged one above the other, are already used in a wide range.
- this represents a particularly advantageous embodiment since in this case the dimensions of the switching arrangement or of the entire ballast can be significantly reduced, which in turn has the consequence that further shielding devices can be attached to the ballast without great effort.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- Spectrometry And Color Measurement (AREA)
Description
Claims (13)
- Schaltungsanordnung zum Betreiben einer Gasentladungslampe,
mit einer Vollbückenschaltung, an die eine Gleichspannung angelegt ist und die vier steuerbare Schalter (S1 - S4) umfaßt,
wobei ein erster Schalter (S1) mit einem zweiten Schalter (S2) und ein dritter Schalter (S3) mit einem vierten Schalter (S4) in Serie geschaltet sowie der erste Schalter (S1) mit dem dritten Schalter (S3) und der zweite Schalter (S2) mit dem vierten Schalter (S4) verbunden ist,
und wobei eine Gasentladungslampe (LA) in einem Brückenzweig, der einen Knotenpunkt zwischen dem ersten Schalter (S1) und dem zweiten Schalter (S2) mit einem Knotenpunkt zwischen dem dritten Schalter (S3) und dem vierten Schalter (S4) verbindet, angeordnet ist,
und mit einer Steuerschaltung, welche in einem Normalbetrieb der Gasentladungslampe (LA) die vier Schalter (S1 - S4) derart ansteuert, daß sie mit einer ersten Frequenz (f1) abwechseln zwischen einem ersten und einem zweiten Zustand (T1, T2) umschaltet,
wobei in dem ersten Zustand (T1) der zweite und dritte Schalter (S2, S3) geöffnet sind, der erste Schalter (S1) geschlossen ist und der vierte Schalter (S4) mit einer zweiten Frequenz (f2), die höher ist als die erste Frequenz (f1), abwechselnd geöffnet und geschlossen wird,
und wobei in dem zweiten Zustand (T2) der erste und vierte Schalter (S1, S4) geöffnet sind, der dritte Schalter (S3) geschlossen ist und der zweite Schalter (S2) mit der zweiten Frequenz (f2) abwechselnd geöffnet und geschlossen wird,
dadurch gekennzeichnet, daß die Steuerschaltung die vier Schalter (S1 - S4) in einer Startphase (Ts) derart ansteuert, daß der vierte Schalter (S4) geschlossen ist, der dritte Schalter (S3) geöffnet ist und der erste und zweite Schalter (S1, S2) mit einer dritten Frequenz (f3) abwechselnd geöffnet und geschlossen werden. - Schaltungsanordnung nach Anspruch 1,
dadurch gekennzeichnet, daß die zweite Frequenz (f2) größer als 1 MHz ist. - Schaltungsanordnung nach Anspruch 2,
dadurch gekennzeichnet, daß die zweite Frequenz (f2) im Bereich zwischen 2,2 MHz und 3,0 MHz liegt. - Schaltungsanordnung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß die dritte Frequenz (f3) größer als 1 MHz ist. - Schaltungsanordnung nach Anspruch 4,
dadurch gekennzeichnet, daß die dritte Frequenz (f3) im Bereich zwischen 2,2 MHz und 3,0 MHz liegt. - Schaltungsanordnung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß in dem Brückenzweig ein Serienresonanzkreis (L, C1) angeordnet ist. - Schaltungsanordnung nach Anspruch 6,
dadurch gekennzeichnet, daß der Serienresonanzkreis eine Drosselspule (L) und einen Resonanzkondensator (C1) aufweist, wobei die Entladungslampe (LA) parallel zu dem Resonanzkondensator (C1) liegt. - Schaltungsanordnung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß passive Bauelemente der Schaltungsanordnung in eine Mehrlagenschaltung integriert sind. - Schaltungsanordnung nach Anspruch 8,
dadurch gekennzeichnet, daß es sich bei der Mehrlagenschaltung um eine LTCC-Struktur handelt, die aus mehreren übereinander angeordneten niedrig sinternden Keramikschichten besteht. - Schaltungsanordnung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß diese Bestandteil eines elektronischen Vorschaltgerätes ist, das eine mit der Netzspannung (un) verbundene Gleichrichterschaltung (1) aufweist, welche die Schaltungsanordnung speist. - Verfahren zum Betreiben einer Gasentladungslampe (LA),
wobei die Gasentladungslampe (LA) in einem Normalbetrieb mit einer Wechselspannung betrieben wird, die aus einem ersten Signal mit einer ersten Frequenz (f1) und einer ersten Amplitude (U1) besteht, dem ein zweites Signal mit einer zweiten Frequenz (f2) und einer zweiten Amplitude (U2) überlagert ist, wobei die zweite Frequenz (f2) größer als die erste Frequenz (f1) und die erste Amplitude (U1) größer als die zweite Amplitude (U2) ist,
dadurch gekennzeichnet, daß die Gasentladungslampe in einer Startphase mit einer Wechselspannung betrieben wird, deren Amplitude (U3) größer ist als die erste Amplitude (U1) und deren Frequenz (f3) kleiner oder gleich der zweiten Frequenz (f2) ist. - Verfahren nach Anspruch 11,
dadurch gekennzeichnet, daß die zweite Frequenz (f2) größer als 1 MHz ist. - Verfahren nach Anspruch 12,
dadurch gekennzeichnet, daß die zweite Frequenz (f2) in einem Bereich zwischen 2,2 MHz und 3,0 MHz liegt.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19963289A DE19963289A1 (de) | 1999-12-27 | 1999-12-27 | Schaltungsanordnung zum Betreiben einer Gasentladungslampe |
DE19963289 | 1999-12-27 | ||
PCT/EP2000/010557 WO2001049082A1 (de) | 1999-12-27 | 2000-10-26 | Schaltungsanordnung zum betreiben einer gasentladungslampe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1243165A1 EP1243165A1 (de) | 2002-09-25 |
EP1243165B1 true EP1243165B1 (de) | 2003-07-23 |
Family
ID=7934691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00974462A Expired - Lifetime EP1243165B1 (de) | 1999-12-27 | 2000-10-26 | Schaltungsanordnung zum betreiben einer gasentladungslampe |
Country Status (6)
Country | Link |
---|---|
US (1) | US6747423B2 (de) |
EP (1) | EP1243165B1 (de) |
AT (1) | ATE245887T1 (de) |
AU (1) | AU1275801A (de) |
DE (2) | DE19963289A1 (de) |
WO (1) | WO2001049082A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6803730B2 (en) * | 2001-03-21 | 2004-10-12 | International Rectifier Corporation | Single stage PFC + ballast control circuit/general purpose power converter |
GB0427682D0 (en) * | 2004-12-17 | 2005-01-19 | Havard Engineering Plc | Power control |
JP4956019B2 (ja) * | 2005-03-02 | 2012-06-20 | パナソニック株式会社 | 点灯ユニット及びランプ |
DE102005034505A1 (de) * | 2005-07-20 | 2007-02-01 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Schaltungsanorndung mit transformatorlosem Wandler mit Drossel für den gepulsten Betrieb von dielektrischen Barriere-Entladungslampen |
DE102006026750A1 (de) * | 2006-06-08 | 2007-12-13 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Hochdruckentladungslampe mit verbesserter Zündfähigkeit sowie Hochspannungspulsgenerator |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT392384B (de) * | 1985-02-04 | 1991-03-25 | Zumtobel Ag | Vorschaltgeraet zum betrieb von gasentladungslampen mit gleichstrom |
US4734624A (en) * | 1985-07-25 | 1988-03-29 | Matsushita Electric Works, Ltd. | Discharge lamp driving circuit |
DE4123187A1 (de) * | 1991-07-12 | 1993-01-14 | Tridonic Bauelemente | Vorschaltgeraet zum pulsbetrieb von gasentladungslampen |
JPH1022083A (ja) * | 1996-07-05 | 1998-01-23 | Matsushita Electric Works Ltd | 放電灯点灯装置 |
DE19819027A1 (de) * | 1998-04-29 | 1999-11-04 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Schaltungsanordnung zum Betrieb mindestens einer Entladungslampe |
ATE221715T1 (de) * | 1998-09-18 | 2002-08-15 | Knobel Lichttech | Schaltungsanordnung zum betreiben von gasentladungslampen |
US6437515B1 (en) * | 2000-01-18 | 2002-08-20 | Matsushita Electric Works, Ltd. | Discharge lamp lighting device of high startability with high pulse voltage |
-
1999
- 1999-12-27 DE DE19963289A patent/DE19963289A1/de not_active Ceased
-
2000
- 2000-10-26 DE DE50003045T patent/DE50003045D1/de not_active Expired - Lifetime
- 2000-10-26 AU AU12758/01A patent/AU1275801A/en not_active Abandoned
- 2000-10-26 AT AT00974462T patent/ATE245887T1/de active
- 2000-10-26 EP EP00974462A patent/EP1243165B1/de not_active Expired - Lifetime
- 2000-10-26 WO PCT/EP2000/010557 patent/WO2001049082A1/de active IP Right Grant
-
2002
- 2002-06-26 US US10/179,176 patent/US6747423B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO2001049082A1 (de) | 2001-07-05 |
DE19963289A1 (de) | 2001-06-28 |
DE50003045D1 (de) | 2003-08-28 |
US20030025466A1 (en) | 2003-02-06 |
US6747423B2 (en) | 2004-06-08 |
AU1275801A (en) | 2001-07-09 |
EP1243165A1 (de) | 2002-09-25 |
ATE245887T1 (de) | 2003-08-15 |
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