EP2327276A1 - Schaltungsanordnung und verfahren zum betreiben einer entladungslampe - Google Patents
Schaltungsanordnung und verfahren zum betreiben einer entladungslampeInfo
- Publication number
- EP2327276A1 EP2327276A1 EP08804310A EP08804310A EP2327276A1 EP 2327276 A1 EP2327276 A1 EP 2327276A1 EP 08804310 A EP08804310 A EP 08804310A EP 08804310 A EP08804310 A EP 08804310A EP 2327276 A1 EP2327276 A1 EP 2327276A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coupled
- electronic switch
- circuit arrangement
- output
- switch
- 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
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
-
- 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
-
- 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
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
- H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
-
- 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
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
- H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
- H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
- H05B41/3925—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by frequency variation
Definitions
- the present invention relates to a circuit arrangement for operating a discharge lamp, comprising an input having a first and a second input terminal for connecting a supply voltage, a first electronic switch having a control electrode, a working electrode and a reference electrode, wherein the working electrode is coupled to the first input terminal, a first diode whose anode is coupled to the second input terminal and whose Ka ⁇ method is coupled to form a first connection point with the reference electrode of the first electronic switch, a control device for the control of the first electronic switch is coupled to its control electrode, an output having a first and a second output terminal for providing an output voltage to the discharge lamp, an inductance, which is arranged in series with one of the output terminals, a lamp string el, which is between the first connection point and the first output terminal gekop ⁇ pelt, and a first capacitor coupled between the first output terminal and the anode of the first diode, wherein the control device is designed, the first electronic switch continuously conducting for a switch- and not switch ⁇ for a
- Such a circuit arrangement is known from the prior art. It is essentially a buck converter with a downstream ignition device for the discharge lamp, the mentioned inductance representing the ignition inductance.
- the mentioned inductance representing the ignition inductance.
- the object of the present invention is therefore, an aforementioned circuit arrangement relate hung as an aforementioned method in such a wei ⁇ terzu brieflyen that an extinction of the discharge lamp with low power dissipation is reliably prevented.
- the present invention is based on the finding that vibrations can occur in the output circuit as a function of the starting inductance and the first capacitor. At low lamp impedances they are little dampens loaded and can interfere with the lamp operation, as the Lam ⁇ penstrom swings.
- a measurement of the output current is provided, wherein by appropriate control of the first electronic switch, the output current fixed-frequency peak-to-peak is regulated.
- the effective drive frequency of the resonance frequency which is essentially determined by the Zündindukt culinary and the first capacitor approaches.
- the control loop thus "drags itself into oscillation.” In doing so, the current can even swing into negative, causing the lamp to extinguish.
- ⁇ constricting invention eliminates the above problem in that the circuit arrangement is not operated in nearly fixed frequency in the continuous mode, but the turn-off of the first electronic switch is varied.
- the distance to the mentioned resonant frequency is determined and a sufficient distance is established by varying the switch-off time. This reliably prevents a "pulling in" of the control loop into the oscillation, as a result of which extinction of the discharge lamp can reliably be prevented even without the use of additional ohmic resistors for damping the output circuit.
- the control device may be adapted to the switch-off proportional, in particular directly or indirectly, per ⁇ proportional to vary the output voltage.
- the control device may in particular be designed to shorten the turn-off time when the output voltage increases, and vice versa. If T e i n the on time T of the turn-off, L, for the serially represents one of the output ⁇ connections arranged inductance and C the capacitance of the first capacitor, the rudder systems particularly adapted to vary the switch-off such that applies :
- control device particularly preferably avoids a range of 20 percent below to 20 percent above the resonance frequency, so that the following applies:
- a circuit arrangement preferably further comprises a current measuring resistor, which is coupled between the anode of the first diode and the second input terminal, for measuring the current through the first electronic switch in its conducting state, wherein the control device is coupled to the current measuring resistor and is designed to vary the switch-on time for regulating the current to a predefinable value.
- the switch is in particular so-regulates ⁇ that the average current remains constant despite the different chen off times.
- a preferred far Erbil ⁇ dung of a circuit arrangement according to the invention further comprises a second, a third and a fourth electronic switch, wherein the first, second, third and fourth electronic switches represent a whole ⁇ bridge, wherein the first connection point egg represents NEN first bridge center point, wherein the scarf ⁇ processing arrangement further includes a second diode coupled in parallel with the first electronic switch, wherein the second electronic switch is coupled in parallel with the first diode, wherein the third and fourth electronic switches to form a second connection point representing a second Brückenmit ⁇ core; the coupled together, wherein the second bridge center point represents the second output terminal, wherein the control device is designed, the first, second, third, and according to the invention to control the fourth electronic switch.
- the control device controls the third electronic switch is preferably implemented in a ers ⁇ th phase-conductive, non-conductive to turn off the fourth electronic switch and the first electronic switch, in a second phase, the fourth electronic switch conductive, the third electronic switch and the second electronic Switch non-conducting switch, wherein the first and the second phase with a first vorable ⁇ frequency, which is in particular in Niederfrequenzbe ⁇ rich continuously alternate, the control device is further designed in the first phase, the second electronic switch and in the second phase, the first electronic switch with a second predetermined frequency, which is rich in particular Hochfrequenzbe ⁇ rich, alternately conductive and non-conductive switch and thereby to vary the turn-off in dependence on the measured output voltage.
- a free-wheeling diode is connected in parallel to each of the third and fourth electronic switches.
- the circuit arrangement comprises a second capacitor, which is coupled between the first input terminal and the first output terminal.
- Figure 1 is a schematic representation of a first embodiment of a circuit ⁇ arrangement with an electronic switch.
- Fig. 2 is a schematic representation of a second exemplary embodiment of an inventive circuit arrangement with ⁇ full bridge topology
- Fig. 4 shows the time course of corresponding quantities at resonance according to the prior art.
- Fig. 1 shows a schematic representation of a first embodiment of an inventive Heidelbergungsanord ⁇ tion.
- This comprises an input with a first egg and a second input terminal E 2 , to which a supply voltage can be connected. Between the inputs, an optional capacitor C E is arranged, which serves to stabilize the input voltage.
- the circuit arrangement comprises a first electronic switch Qi with a control electrode, a working electrode and a reference electrode. The working electrode is coupled to the first input terminal E 1 .
- Wei ⁇ thermore attention must a diode Di, yet whose cathode is coupled with the formation of a connection point with the N dustselekt ⁇ rode of the electronic switch Qi.
- the circuit arrangement further comprises an output with a first Ai and a second output terminal A 2 , at which an output voltage U A is provided to a discharge lamp La.
- an output voltage U A is provided to a discharge lamp La.
- the series connection of a lamp inductor Li and an ignition inductance L z is arranged between the connection point N and the first output terminal Ai.
- the connection point between the Lampendros ⁇ sel Li and the Zündindukt Chemistry L z is coupled via a capacitor ⁇ Ci with the second output terminal A 2 .
- the anode of the diode Di is also coupled to the output terminal A 2 .
- a voltage ⁇ measuring device 10 For measuring the output voltage U A , a voltage ⁇ measuring device 10 is provided. A quantity which is correlated with the measured output voltage U A is coupled to a control device 12 which is coupled to the control electrode of the electronic switch Qi. to control this. The controller 12 is also coupled to a current measuring device 14, which is the voltage across a current sensing resistor R s, the interim ⁇ rule the anode of the diode Di and the second inlet connection E 2 are coupled, measures, and to the Steuervorrich ⁇ tung 12 provides. Dashed lines show a firing capacitor C zi . The control device 12 is designed according to the invention to vary the switch-off time of the switch Qi as a function of the measured output voltage U A.
- the variation takes place in particular in such a way that the frequency with which the switch Q x is driven differs from a resonance frequency and its multiples, which are essentially defined by the ignition inductance L z and the first capacitor Ci.
- the current flowing through the lamp inductor L x is denoted by I Li
- the current flowing through the lamp La is denoted by I La
- the current flowing through the switch Q i is denoted by I Q i.
- FIG. 2 shows a schematic representation of a second exemplary embodiment of a circuit arrangement according to the invention, wherein the circuit arrangement now has a full bridge topology.
- Reference numerals that have been introduced in co ⁇ menhang with Fig. 1, are used for like and identical components of Fig. 2 and will not be further inserted again.
- the switch Qi is a second diode D 2 connected in parallel.
- a second capacitor C 2 is coupled.
- a first bridge center BM 1 Between the first switch Qi and the second switch Q 2 is a first bridge center BM 1, between the third Switch Q 3 and the fourth switch Q 4, a second bridge center BM2 formed.
- the productivity Zündin ⁇ L z between the second output terminal A 2 and the second bridge center point BM2 presently is located.
- a further ignition capacitor C z2 is shown, which may be provided as an alternative or in addition to the ignition capacitor Czi. This can be coupled in parallel to the two output terminals Ai, A 2 .
- the operation of the circuit arrangement of FIG. 2 is effected by corresponding control of the switches Qi to Q 4 by the control device 12.
- the control device 12 controls the switch Q 4 in a first phase, the switches Q 3 and Q 2 non-conductive.
- the switch Q 3 is turned on , the switches Q 4 and Qi non-conductive.
- the first and second phase change continually with a first vorgeb ⁇ cash frequency lying in particular in the low frequency region decreases.
- the switch Qi and in the second phase of the switch Q 2 with a second predetermined frequency, which is in particular in Hochfrequenzbe ⁇ rich, alternately turned on and non-conductive ge ⁇ .
- the turn-off time is varied in dependence on the measured output voltage U A in such a way that the drive frequency differs from the resonance frequency, which is essentially defined by the capacitances Ci, C 2 and the ignition inductance L z , and their multiples.
- FIG. 3 and 4 illustrate again the considerations and findings underlying this present invention.
- Fig. 2 - shows the time profile of various currents in a peak-to-peak regulation of the current I Q i through the switch Qi. Shown is a Abschaltstromschwelle I s . As soon as the current through the switch reaches this current value I s , the switch I Q i is switched to the non-conducting state. The turn-on time is T e i n and leads to the increase of the current I L i by the Lampendros ⁇ sel Li.
- the current through the lamp inductor I L i decreases continuously, see T off . Furthermore, the current I D1 is drawn in the freewheeling phase, ie with the switch Q 1 open. Finally, the supplied to the discharge lamp La current I La , which corresponds to the average current I L i qUer through the lamp inductor L 1 is entered.
- Fig. 4 shows the situation when an oscillation occurs in the output circuit, ie the output current I La . Occurs ei ⁇ ne vibration to the output circuit, the current obtained by the current measuring resistor R s at the maximum of vibration an "offset", that is, the off time is reached earlier and at first the on-time decreases tem-
- the minimum of the vibration T e is i n as usual, ie at least more energy is coupled in at the minimum than at the maximum, in particular energy is coupled in with the natural frequency of the oscillating circuit from the starting inductance L z and the capacitor Ci, C 2.
- the circuit oscillates, the offset increases at the maximum, until it is so high that the switch-off threshold is already reached at the switch-on time, see ti of Fig. 4, of the switch Q.
- the switch Qi no longer turns on.
- the total energy is coupled in the minimum, the circle is excited with its resonant frequency. In other words, the control loop "pulls itself into the vibration".
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2008/062358 WO2010031430A1 (de) | 2008-09-17 | 2008-09-17 | Schaltungsanordnung und verfahren zum betreiben einer entladungslampe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2327276A1 true EP2327276A1 (de) | 2011-06-01 |
EP2327276B1 EP2327276B1 (de) | 2013-06-19 |
Family
ID=41152107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08804310.4A Not-in-force EP2327276B1 (de) | 2008-09-17 | 2008-09-17 | Schaltungsanordnung und verfahren zum betreiben einer entladungslampe |
Country Status (7)
Country | Link |
---|---|
US (1) | US8531122B2 (de) |
EP (1) | EP2327276B1 (de) |
JP (1) | JP5542824B2 (de) |
KR (1) | KR20110056546A (de) |
CN (1) | CN102160467B (de) |
TW (1) | TW201014469A (de) |
WO (1) | WO2010031430A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011050597A1 (en) * | 2009-11-02 | 2011-05-05 | City University Of Hong Kong | Apparatus or circuit for driving dc powered lighting equipment |
HUP1000062A3 (en) * | 2010-01-27 | 2012-08-28 | Gradix Holdings Ltd | Apparatus for discharging and operating tube igniter |
TWI586205B (zh) * | 2012-11-26 | 2017-06-01 | 魏慶德 | Led驅動電路之直流核心電路 |
CN107006109B (zh) * | 2014-11-14 | 2019-10-18 | 保富图公司 | 用于闪光管的闪光发生器 |
CN111934548B (zh) * | 2020-07-31 | 2022-01-07 | 矽力杰半导体技术(杭州)有限公司 | 控制电路以及应用其的开关变换器 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6020691A (en) * | 1999-04-30 | 2000-02-01 | Matsushita Electric Works R & D Laboratory, Inc. | Driving circuit for high intensity discharge lamp electronic ballast |
WO2003061352A1 (en) | 2002-01-15 | 2003-07-24 | Koninklijke Philips Electronics N.V. | Device and method for operating a discharge lamp |
DE10207105A1 (de) * | 2002-02-20 | 2003-08-28 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Betriebsgerät für Lampen mit geregeltem SEPIC-Wandler |
DE10328718A1 (de) * | 2003-06-25 | 2005-01-13 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Verfahren zum Betrieb mindestens einer Niederdruckentladungslampe und Betriebsgerät für mindestens eine Niederdruckentladungslampe |
JP4349017B2 (ja) * | 2003-07-09 | 2009-10-21 | ウシオ電機株式会社 | Dc−dcコンバータおよびそれを用いた高圧放電ランプ点灯装置 |
JP4604085B2 (ja) * | 2004-03-31 | 2010-12-22 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 回路装置 |
GB0427682D0 (en) * | 2004-12-17 | 2005-01-19 | Havard Engineering Plc | Power control |
DE102005045569A1 (de) * | 2005-05-31 | 2006-12-07 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Ladevorrichtung für einen Ladekondensator, insbesondere zur Speisung von Entladungslampen |
-
2008
- 2008-09-17 JP JP2011526377A patent/JP5542824B2/ja not_active Expired - Fee Related
- 2008-09-17 EP EP08804310.4A patent/EP2327276B1/de not_active Not-in-force
- 2008-09-17 US US13/119,204 patent/US8531122B2/en not_active Expired - Fee Related
- 2008-09-17 CN CN200880131216.4A patent/CN102160467B/zh not_active Expired - Fee Related
- 2008-09-17 KR KR1020117008635A patent/KR20110056546A/ko not_active Application Discontinuation
- 2008-09-17 WO PCT/EP2008/062358 patent/WO2010031430A1/de active Application Filing
-
2009
- 2009-09-15 TW TW098131039A patent/TW201014469A/zh unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2010031430A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN102160467A (zh) | 2011-08-17 |
US8531122B2 (en) | 2013-09-10 |
CN102160467B (zh) | 2014-01-22 |
TW201014469A (en) | 2010-04-01 |
WO2010031430A1 (de) | 2010-03-25 |
KR20110056546A (ko) | 2011-05-30 |
JP2012503270A (ja) | 2012-02-02 |
EP2327276B1 (de) | 2013-06-19 |
JP5542824B2 (ja) | 2014-07-09 |
US20110169427A1 (en) | 2011-07-14 |
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