WO2009010091A1 - Schaltungsanordnung und verfahren zum betreiben einer entladungslampe - Google Patents
Schaltungsanordnung und verfahren zum betreiben einer entladungslampe Download PDFInfo
- Publication number
- WO2009010091A1 WO2009010091A1 PCT/EP2007/057339 EP2007057339W WO2009010091A1 WO 2009010091 A1 WO2009010091 A1 WO 2009010091A1 EP 2007057339 W EP2007057339 W EP 2007057339W WO 2009010091 A1 WO2009010091 A1 WO 2009010091A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit
- coupled
- output terminal
- voltage
- capacitor
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims abstract description 79
- 230000010355 oscillation Effects 0.000 claims abstract description 11
- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims description 9
- 230000000295 complement effect Effects 0.000 claims description 5
- 230000002123 temporal effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000003595 spectral effect Effects 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
- H05B41/282—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
- H05B41/2827—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 specially adapted components in the load circuit, e.g. feed-back transformers, piezoelectric transformers; using specially adapted load circuit configurations
Definitions
- the present invention relates to a Wegungsanord ⁇ tion for operating a discharge lamp with a rectifier having a first and a second input terminal for coupling with a supply AC voltage and a first and a second output terminal for providing a DC operating voltage, a free-running half-bridge inverter, the series circuit of two voltage controlled electronic switch, which is coupled between the first and the second output terminal of the rectifier, wherein between the first and the second electronic switch, a half-bridge center is formed, a start-up circuit for starting the free-running oscillation of the inverter, wherein the start-up circuit comprises a drive circuit with a first and a second output terminal, wherein the first output terminal of the drive circuit o with the control electrode of the first and the second electronic switch o and a starting capacitor with a first and a second connection. It also relates to a method for operating a discharge lamp on such a circuit arrangement.
- the present invention relates to circuit arrangements for independently starting a free-running ing half-bridge inverter with voltage-controlled transistors, such as MOSFET or IGBT as Schal ⁇ ter when creating a supply voltage.
- voltage-controlled transistors such as MOSFET or IGBT as Schal ⁇ ter
- the half-bridge inverter can also be constructed from complementary transistors (n- and p-channel), wherein both transistors are controlled with the same drive circuit.
- This principle is known from EP 0 781 077 B1, where a diac was still needed to start the half-bridge inverter.
- the idea according to EP 0 917 412 B1 can be transferred to the circuit arrangement known from EP 0 781 077 B1, in which the condensation required for starting the circuit is transferred. in series with the one drive circuit is switched. The functionality of the "startup" is fully met.
- a disadvantage is that the one connection of the resistor, which is required for charging the starting capacitor, is practically at the half-bridge center potential during operation of the discharge lamp.
- the object of the present invention is therefore to develop a circuit arrangement or a method of the type mentioned in such a way that on the one hand high radio interference can be avoided and on the other hand a safe start-up of the circuit arrangement after applying the mains voltage is still guaranteed.
- the present invention is based on the finding that a combination of the teachings of EP 0 781 077 Bl and EP 0 917 412 Bl and subsequent reconnection of the starting resistor instead of a power line to the positive rectifier output does not solve the above-mentioned problem because Stable voltage conditions set at the starting capacitor, which prevent a repeated start attempt.
- the starting capacitor is therefore according to the invention coupled to the half-bridge center point and coupled to the half-bridge center point a pull-down resistor to the second output terminal of the DC ⁇ funnel.
- Such constellation made ⁇ light that the potential of the half-bridge center point Ü via the pull-down resistor after an unsuccessful attempt to start again on the provided from the second rectifier output, negative reference potential is pulled. This restarts the starting capacitor and allows a new start attempt.
- the resistor, via which the capacitor is connected to a positive potential capacitor is no longer connected to a power line, but with the positive rectifier output, the transmission of radio interference is prevented in the network.
- the circuit arrangement further comprises a lamp inductor having at least one primary winding which is coupled in series with a connection for the discharge lamp, wherein the drive circuit has an inductance with a first and a second terminal, which has a secondary winding. represents the lamp inductor, and a series scarf ⁇ tion of a second ohmic resistance and a resonant circuit coupled between the first and second terminals of the inductor.
- a bypass circuit connected in parallel to the second ohmic resistor, which comprises a capacitor.
- This particularly preferred exporting ⁇ approximate shape is based on the recognition that the control voltage of after application of the mains voltage first switching-on transistor of the half-bridge inverter must remain large enough to start the circuit arrangement, even if the start-up capacitor already discharged by turning on this transistor and thereby the effective Control voltage, ie the sum of the voltage at the starting capacitor and the output voltage of the drive circuit, would tend to be reduced. Maintaining a sufficient control voltage for the transistor at the beginning of discharge of the starting capacitor is preferably ensured by the fact that the drive circuit quickly provides a sufficient output ⁇ voltage available.
- this capacitor represents a very low resistance for the high-frequency spectral components of the switch-on pulse
- the second ohmic resistor which is required for the control of the electronic switches of the half-bridge inverter in continuous operation, is bypassed.
- the charge carriers flowing across the capacitor thus allow a much faster charging of a capacitor, which is provided in the parallel resonant circuit.
- This he ⁇ enables rapid deployment of a sufficiently high control voltage for the first to be switched on half-bridge transistor. The risk of an insufficient control voltage at the first turn-on switch of Halbmaschineninverters is thus effectively countered despite discharge of the starting capacitor.
- the bypass circuit comprises a third ohmic resistor coupled in series with the capacitor.
- This third ohmic resistance brings two advantages: Firstly, it attenuates the Rechteckantei ⁇ le of the voltage that provides a secondary winding on the LAM pendrossel. Therefore, this move that the lamp ballast is connected both with the half-bridge center point at which a high frequency rectangular signal is present, and on the other hand with the lamp that applies a far ⁇ continuous sinusoidal signal to the other terminal of the lamp inductor.
- the third ohmic resistance ⁇ it enables that is available in continuous operation a substantially sinusoidal ⁇ shaped signal for controlling the two electronic switches of the half-bridge inverter.
- the third ohmic resistance increases the potential dead time during the Umschwingens Halbbrü ⁇ ckeninverters. This allows lossless switching of the switches of the half-bridge inverter. Gene ⁇ rell applies that the third ohmic resistance is dimensioned much smaller than the second ohmic resistance.
- a circuit arrangement according to the invention further comprises a diode which is connected in parallel with the first ohmic resistor and is oriented such that it allows the starting capacitor to be discharged via the first electronic switch when the first electronic switch is conductive is switched.
- the diode discharges the start ⁇ capacitor after a successful start, so then interfere with any further start attempts the operation of the circuit.
- the first terminal of the starting capacitor is coupled via a further ohmic resistance to the second output terminal of the rectifier.
- the provision of a diode mentioned in the preceding paragraph can then be dispensed with.
- the discharge of the starting capacitor takes place here via the first and the further ohmic resistance. This is due to the fact that in operation both terminals of the starting capacitor are on average at egg ⁇ nem potential which corresponds exactly to half the half-bridge voltage, whereby the starting capacitor is discharged during operation.
- a further capacitor is provided, which is coupled between the first output terminal of the drive circuit and the control electrode of the second electronic switch. Since it takes some time in the pure ohmic discharge of the starting capacitor until the voltage across the starting capacitor is reduced, the output voltage of the drive circuit has a positive offset component. This off-set portion counteracts turning on the second Transis ⁇ tors, since the available control voltage for the second transistor through it is reduced.
- the proposed further capacitor acts as a coupling capacitor ⁇ and receives the aforementioned offset voltage.
- the two electronic switches of the half-bridge inverter can be transistors of complementary polarity, but also transistors of the same polarity.
- the use of transistors of complementary polarity offers the advantage that only one drive circuit has to be provided.
- 1 shows a schematic representation of a first embodiment of a circuit ⁇ arrangement according to the invention
- 2 shows a schematic representation of a second embodiment of a circuit arrangement according to the invention ⁇ ;
- Fig. 3 is a schematic representation of a third exemplary embodiment of an inventive circuit arrangement ⁇ ;
- Fig. 4 for the embodiment of Figure 1 the ckentransistoren zeitli ⁇ chen course of the voltage across the starting capacitor, the control voltage for the two Halbbrü-, the half-bridge voltage and the current flowing through the lamp inductor load current;
- Fig. 5 for the embodiment of FIG. 1 tor the zeitli ⁇ chen course of the voltage across the Anertonkondensa-, the control voltage for the two Halbbrü- ckentransistoren, the half-bridge voltage and the current flowing through the lamp inductor load current in a different temporal resolution as Fig. 4, in particular, a successful Anschwingvorgang that takes place after a failed attempt;
- FIG. 6 shows the temporal course of the variables from FIG. 5 in the region of the failed startup attempt in high time resolution
- FIG. 7 shows, in a manner analogous to FIG. 4, the time profile of the corresponding quantities for a circuit arrangement according to FIG. 2.
- FIG. 1 shows a schematic representation of a first exemplary embodiment of a circuit arrangement according to the invention for operating a discharge lamp, which is shown as a load EL.
- a rectifier GL is supplied with mains voltage via a fuse SI, which supplies an electrolytic capacitor Cl or holds it to voltage.
- electrolytic capacitor Cl two reliesszwei ⁇ ge are tapped, via a filter from a coil Ll in one of the branches and a two branches connecting capacitor C2.
- the lower supply branch in FIG. 1 has negative potential and defines the reference potential on the rectified side of the circuit arrangement.
- the upper one is the positive supply branch on the other hand.
- Between two supply branches is a half-bridge of an N-channel transistor Tl and a P-channel transistor T2.
- a load ⁇ circle of a load-serial lamp inductor L2 Between a center HB of the half-bridge and the positive supply branch is a load ⁇ circle of a load-serial lamp inductor L2, the discharge lamp EL and the load-serial coupling capacitor C7. Furthermore, a load-parallel connection with two resonance capacitors C8 and C9 and a thermistor KL for the lamp ignition is provided.
- the upper half-bridge transistor Tl is a capacitor C6 in parallel.
- the on ⁇ control circuit AS comprises the parallel connection of a coil L3, a capacitor C3 and a series circuit of a secondary winding HWl a Steuertransforma ⁇ sector whose primary winding is the aforementioned lamp inductor L2, and a resistor R3. Parallel to Wi ⁇ resistance R3, the series circuit of a capacitor C4 and a resistor R4 is connected.
- a start capacitor C5 is coupled in series with the drive circuit AS.
- the connection point between the drive circuit AS and the starting capacitor C5 is connected via a resistor Rl to the positive supply branch, while the half-bridge center is connected via a pull-down resistor R2 with the negati ⁇ ven supply branch.
- the ohmic resistor Rl is a diode Dl connected in parallel.
- the starting capacitor C5 is charged via the resistor Rl and the pull-down resistor R2. After the start, d. H. When the transistor Tl is fully conductive for the first time, the starting capacitor C5 is substantially discharged again via the diode D1 and the transistor T1.
- the periodicity of these start attempts is determined by dimensioning the resistors Rl and R2 and the capacitor C5 and the intermediate circuit voltage U zw , which is provided on the capacitor Cl.
- This capacitive bridging allows by a differentiating behavior a fast charge of the capacitance C3 of the parallel resonant circuit and thus the rapid provision of a sufficiently high control voltage for the half-bridge transistor Tl to be turned on.
- a purely capacitive bridging of the resistor R3 has the disadvantage that the control voltage turns on in normal operation in the commutation phase of the half-bridge to be switched on depending ⁇ wells transistor too fast, whereby losses occur.
- a resistor R4 can be connected in series with the capacitor C4.
- FIG. 2 shows an embodiment of a circuit arrangement according to the invention, in which the discharge of the starting capacitor C5 does not take place by means of a diode, but via the ohmic resistors R1 and R5.
- both terminals of the starting capacitor C5 are on average at a potential which corresponds exactly to half the half-bridge voltage.
- the capacitor C5 is discharged.
- the starting capacitor C5 gela ⁇ since laid a half-bridge side connection on the PuIl- down resistor R2 to the negative supply potential.
- FIG. 3 shows an improved embodiment of the circuit arrangement according to FIG. 2. Since, in the case of the purely ohmic
- Discharge of the starting capacitor C5 takes some time until the voltage across the starting capacitor C5 is reduced, the output voltage of the drive circuit AS has a positive offset portion temporarily. This offset component counteracts a turn-on of the transistor T2, since the available control voltage for the transistor T2 is reduced by it.
- FIGS. 4 to 7 show the time course of the voltage across the starting capacitor C5, the control voltage UQ S for the two transistors of the half bridge voltage U HB and the current flowing through the lamp inductor L2 load ⁇ current I L in different operating phases for different embodiments the invention.
- Fig. 4 shows the voltage and current conditions when oscillating the oscillation. It can clearly be seen that the control voltage U GS of the transistors Tl, takes T2 ⁇ , although the voltage U C s is reduced to the starting capacitor C5 from the time tl at which the half-bridge voltage UHB reaches the positive supply potential. This is because the starting capacitor C5 is discharged via the diode D1 and the transistor T1.
- the gradient of the increase of the control voltage U GS is greater than the gradient of the increase of the load current I L.
- Fig. 5 shows in another time resolution a successful oscillation process, which takes place after a failed attempt. From this figure it can be seen that even with a failed Anschwing bath the voltage across the starting capacitor C5 drops because the starting capacitor C5 is discharged via the diode Dl at least once. Since the half-bridge voltage U HB is drawn by the pull-down resistor R2 again in the direction of negative supply potential, the original, before the application of the mains voltage existing voltage states are reached and a retry attempt is made automatically. This behavior enables high reliability of the circuit arrangement.
- Fig. 6 shows the failed Anschwing pulp of FIG. 5 in high time resolution. It can clearly be seen that, although the control voltage U G s is sufficient to the transistor Tl, whereby the half-bridge voltage U HB reaches the level of the positive supply potential and the starting capacitor C5 is discharged via the diode Dl for the first time. However, the negative oscillation of the tax is not sufficient erwear U G s to comport the transistor T2 ⁇ switch. There is an asymptotic decay of the overall vibration. The still occurring oscillation of the load current I L through the lamp inductor L2 cyclically drives the half-bridge voltage U HB to the positive supply potential, whereby a multiple discharge of the starting capacitor C5 takes place.
- Fig. 7 shows in an analogous manner as Fig. 4, the oscillation of the arrangement, when a circuit arrangement according to Fig. 2 is used. It can clearly be seen that the starting capacitor C5 is no longer discharged suddenly when the half-bridge voltage U HB has reached the level of the positive supply potential.
- FIGS. 1 to 3 Although embodiments with complementary transistors T1, T2 have been shown in FIGS. 1 to 3, the present invention can also be implemented for half-bridge circuits having two independent drive circuits and transistors of the same polarity. However, this is associated with the presented circuit arrangements with additional costs.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Inverter Devices (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200780053813A CN101755489A (zh) | 2007-07-16 | 2007-07-16 | 用于驱动放电灯的电路装置和方法 |
JP2010516374A JP5216086B2 (ja) | 2007-07-16 | 2007-07-16 | 放電ランプを作動させるための回路装置および方法 |
PCT/EP2007/057339 WO2009010091A1 (de) | 2007-07-16 | 2007-07-16 | Schaltungsanordnung und verfahren zum betreiben einer entladungslampe |
TW097124816A TW200913789A (en) | 2007-07-16 | 2008-07-02 | Circuit arrangement and method for operating a discharge lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2007/057339 WO2009010091A1 (de) | 2007-07-16 | 2007-07-16 | Schaltungsanordnung und verfahren zum betreiben einer entladungslampe |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009010091A1 true WO2009010091A1 (de) | 2009-01-22 |
Family
ID=39092823
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2007/057339 WO2009010091A1 (de) | 2007-07-16 | 2007-07-16 | Schaltungsanordnung und verfahren zum betreiben einer entladungslampe |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP5216086B2 (de) |
CN (1) | CN101755489A (de) |
TW (1) | TW200913789A (de) |
WO (1) | WO2009010091A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2651195A1 (de) * | 2012-04-13 | 2013-10-16 | Helvar Oy Ab | Schaltung, Verfahren und Anordnung zum Betreiben einer selbstschwingenden Halbbrücke zur Versorgung einer Lampe mit Strom |
US9096578B2 (en) | 2011-11-04 | 2015-08-04 | Semiconductor Energy Laboratory Co., Ltd. | Dibenzol[f,h]quinoxaline compound, light-emitting element, light-emitting device, electronic device, and lighting device |
CN107837242A (zh) * | 2016-09-19 | 2018-03-27 | 天津大学 | 基于microRNA纳米微囊在骨愈合中的应用 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0917412A2 (de) * | 1997-11-18 | 1999-05-19 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Freischwingende Oszillatorschaltung mit einfacher Anlaufschaltung |
US6018220A (en) * | 1997-07-21 | 2000-01-25 | General Electric Company | Gas discharge lamp ballast circuit with a non-electrolytic smoothing capacitor for rectified current |
DE102005025154A1 (de) * | 2005-06-01 | 2006-12-07 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Schaltungsanordnung zum Betrieb einer Entladungslampe mit Temperaturausgleich |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001160496A (ja) * | 1999-12-01 | 2001-06-12 | Ikeda Electric Co Ltd | 放電灯点灯装置 |
US6555974B1 (en) * | 2000-11-21 | 2003-04-29 | General Electric Company | Wiring geometry for multiple integral lamps |
JP2004047295A (ja) * | 2002-07-12 | 2004-02-12 | Toshiba Lighting & Technology Corp | 放電ランプ点灯装置および照明器具 |
JP2005243463A (ja) * | 2004-02-26 | 2005-09-08 | Toshiba Lighting & Technology Corp | 電球形蛍光ランプ |
-
2007
- 2007-07-16 JP JP2010516374A patent/JP5216086B2/ja not_active Expired - Fee Related
- 2007-07-16 WO PCT/EP2007/057339 patent/WO2009010091A1/de active Application Filing
- 2007-07-16 CN CN200780053813A patent/CN101755489A/zh active Pending
-
2008
- 2008-07-02 TW TW097124816A patent/TW200913789A/zh unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6018220A (en) * | 1997-07-21 | 2000-01-25 | General Electric Company | Gas discharge lamp ballast circuit with a non-electrolytic smoothing capacitor for rectified current |
EP0917412A2 (de) * | 1997-11-18 | 1999-05-19 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Freischwingende Oszillatorschaltung mit einfacher Anlaufschaltung |
DE102005025154A1 (de) * | 2005-06-01 | 2006-12-07 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Schaltungsanordnung zum Betrieb einer Entladungslampe mit Temperaturausgleich |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9096578B2 (en) | 2011-11-04 | 2015-08-04 | Semiconductor Energy Laboratory Co., Ltd. | Dibenzol[f,h]quinoxaline compound, light-emitting element, light-emitting device, electronic device, and lighting device |
EP2651195A1 (de) * | 2012-04-13 | 2013-10-16 | Helvar Oy Ab | Schaltung, Verfahren und Anordnung zum Betreiben einer selbstschwingenden Halbbrücke zur Versorgung einer Lampe mit Strom |
CN107837242A (zh) * | 2016-09-19 | 2018-03-27 | 天津大学 | 基于microRNA纳米微囊在骨愈合中的应用 |
Also Published As
Publication number | Publication date |
---|---|
TW200913789A (en) | 2009-03-16 |
CN101755489A (zh) | 2010-06-23 |
JP5216086B2 (ja) | 2013-06-19 |
JP2010533938A (ja) | 2010-10-28 |
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