EP2526741A1 - Schaltungsanordnung und verfahren zur schnellen kommutierung beim rechteckbetrieb von hochdruckentladungslampen - Google Patents
Schaltungsanordnung und verfahren zur schnellen kommutierung beim rechteckbetrieb von hochdruckentladungslampenInfo
- Publication number
- EP2526741A1 EP2526741A1 EP10779504A EP10779504A EP2526741A1 EP 2526741 A1 EP2526741 A1 EP 2526741A1 EP 10779504 A EP10779504 A EP 10779504A EP 10779504 A EP10779504 A EP 10779504A EP 2526741 A1 EP2526741 A1 EP 2526741A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- switch
- lamp
- commutation
- com
- pressure discharge
- 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
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims abstract description 36
- 230000000977 initiatory effect Effects 0.000 claims abstract description 16
- 230000008878 coupling Effects 0.000 claims abstract description 12
- 238000010168 coupling process Methods 0.000 claims abstract description 12
- 238000005859 coupling reaction Methods 0.000 claims abstract description 12
- 238000012937 correction Methods 0.000 claims description 3
- 238000009499 grossing Methods 0.000 description 9
- 230000000903 blocking effect Effects 0.000 description 5
- 206010073261 Ovarian theca cell tumour Diseases 0.000 description 4
- 230000008033 biological extinction Effects 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition 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
- H05B41/288—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 without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
- H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2928—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal operating conditions
-
- 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
- H05B41/288—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 without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
- H05B41/2881—Load circuits; Control thereof
- H05B41/2882—Load circuits; Control thereof the control resulting from an action on the static converter
- H05B41/2883—Load circuits; Control thereof the control resulting from an action on the static converter the controlled element being a DC/AC converter in the final stage, e.g. by harmonic mode starting
Definitions
- the invention relates to a circuit arrangement and method for rapid commutation in the rectangular operation of high-pressure discharge lamps.
- the invention relates to an electronically controlled operation of high-pressure discharge lamps with a fast commutation sequence.
- the invention is based on a circuit arrangement for rapid commutation in the rectangular operation of high-pressure discharge lamps according to the preamble of the main claim.
- High-pressure discharge lamps In particular of high-pressure discharge lamps with a ceramic discharge vessel, a relatively low-frequency rectangular lamp power supply with fast commutation is usually used.
- High-pressure discharge lamps generally have two rod-shaped electrodes arranged in the discharge vessel, which are often equipped with coiled attachments for conditioning the bend attachment.
- the current commutation serves to prevent the one-sided electrode wear and must be accomplished with sufficiently fast polarity reversal, so that the lamp does not go out during commutation.
- the commutation time is typically in the range of less than 100 is.
- the commutation frequency is generally chosen so that, on the one hand, the short-term discontinuities during the commutation process do not manifest as flickering in the light and, on the other hand, the acoustic emissions from both the hot lamp and the operating equipment do not fall within the audible range.
- This requirement can best be achieved with a commutation frequency in the range between 50 Hz and 200 Hz.
- the commutation frequency should not be set above the audio hearing range at more than 20 kHz, so that the acoustic resonances of the discharge arc, which are in the range between 20 kHz and 150 kHz for conventional lamp geometries, are not arbitrarily excited during operation of the lamp.
- a further constraint to the rectangular operating a high pressure discharge lamp is to minimize the harnessfre ⁇ -frequency ripple on the square-wave lamp current, so that thereby the acoustic modes in the discharge arc of the Lamp can not be arbitrarily excited, which, as already mentioned, can lead to arc instabilities.
- the rectangular in standard operation of a high-pressure discharge lamp allowable limit for the naval flickreqente residual ripple is in the range of less than 2%.
- the forming high-frequency ripple of a standard operating device with rectangular lamp current form is essentially the remaining residual ripple, which originates from the internal high-frequency operating method of the switching converter.
- the visible remaining residual ripple depends directly on the time constant of the smoothing devices, which depends essentially on the size of the smoothing capacitor used at the output of the lamp circuit.
- a high time constant for strong smoothing of the lamp current leads in the same way to slowing down the natural commutation time or to increase the circuit ⁇ expenses for the implementation of an actively controlled commutation.
- Fig. 1 is a schematic circuit topology of an electronic operating unit for operating a standard high-pressure discharge lamp according to the prior art is Darge ⁇ provides, in which the amount of the residual ripple of the lamp current was brought into line with the achievable commutation.
- the intermediate circuit voltage U ZK of 400 VDC is provided by a network power factor correction unit (not shown) via a DC link capacitor C ZK .
- the half-bridge circuit is designed as a deep-set half-bridge with the transistors Q1_HIGH and Q2_LOW.
- high-frequency pulse-width modulation is superimposed on the low-frequency operation at approximately 100 Hz in order to be able to reduce the input voltage of the half-bridge to the required lamp voltage.
- the high-pressure discharge lamp 5, hereinafter also referred to as a lamp, is operated in the two phases, the forward phase and the reverse phase, to the average voltage U C B, which adjusts itself constant at the blocking capacitor C B in the amount of 200VDC.
- the differential voltage U L occurring at the lamp is + 100V in forward operation and -100V in reverse operation.
- the current I L occurring at the lamp is in the two operating phases corresponding to Lamp voltage also inverted in each case.
- the smoothing of the generated operating voltage at the output of the switching converter depends on the operating frequency and the LC time constant of the switching converter.
- the state of charge of the converter capacitor C from the intermediate circuit capacitor CZK is charged via the inductance L resonantly to the voltage value 300V.
- a large LC time constant has a long resonant Umla- dezeit and thus a correspondingly slow commutation ⁇ time result.
- the time constant of fo 10 kHz results in a residual ripple of less than 2% at an operating frequency of approx.
- the smoothing requirements and the commutation times conflict with this switching arrangement and must be compensated appropriately.
- an ignition transformer with a switching transistor for generating one or more ignition pulses is introduced into the lamp circuit.
- the fillings of these novel lamps usually show one increased sensitivity to excite bend-stabilizing acoustic eigenmodes, thereby increasing the smoothness requirements of the output circuit
- a circuit arrangement for fast commutation in the rectangular operation of high-pressure discharge lamps comprising a Wegstende half-bridge arrangement with a half-bridge, a lamp inductor, a converter capacitor, a blocking capacitor, a first switch for coupling the half-bridge arrangement with the Lamp, a second switch for performing the forward current commutation and for initiating a forward phase, a third switch for performing the reverse current commutation and for initiating a reverse phase.
- the circuit arrangement further comprises a starting inductance and a starting capacitor.
- a simplified ignition of Hochdruckentla ⁇ tion lamp can be realized in conjunction with the circuit ⁇ arrangement according to the invention.
- the circuit arrangement further comprises a power factor correction circuit.
- the object of the method is achieved by a method for operating a high-pressure discharge lamp by means of a circuit arrangement having a half-bridge arrangement with a half-bridge and a lamp inductor, a converter capacitor and a blocking capacitor, with the following steps:
- FIG. 1 shows a circuit topology according to the state of the art, in which the magnitude of the residual current of the lamp current can be compared with the achievable one
- Fig. 2 shows a Serithsan extract m according to the invention
- 3a is an overall view of the functionality of the switching ⁇ arrangement for the rectangular operation
- 3b shows a detailed switching sequence of the commutation in the forward mode
- Fig. 4 shows a circuit arrangement according to the invention in a second embodiment to achieve a fast Lampenstromkommutation exclusively for the remindykommuttechnik for initiating the stationary backward phase in a ballast for rectangular operation.
- FIG. 2 shows a circuit arrangement according to the invention, in which the deep-setting half-bridge is decoupled from the smoothing characteristic of the internal switching converter and both characteristics can be set independently of one another.
- the lamp itself is operated at the mid voltage level at 200VDC on block capacitor C B.
- Lamp circuit and thus the lamp during the relatively long reloading of the converter capacitor C of Heidelbergkon ⁇ verters (more than 100 ⁇ is) are temporarily coupled away.
- the forward commutation is understood to mean the commutation from the reverse phase to the forward phase, during which the lamp current has to be changed from a negative value to a positive value.
- the switch-on duration of the forward commutation is selected such that the commutation current that arises is the Arnold Böcklin lamp heats up sufficiently so that the subsequent ⁇ sequent feeding back of the lamp can be accomplished to a converter capacitor C of the switching converter without danger of extinction running.
- Backward commutation is understood to mean the commutation from the forward phase to the backward phase at which the lamp current must be changed from a positive value to a negative value.
- a negative current I L is fed to the block capacitor through the lamp 5 to the ground in the present circuit arrangement ⁇ via the switch Q_COM_BW starting from U C B.
- the switching duration of the reminding commutation current is chosen so that the up-adjusting commutation current sufficiently heats up the air, so that this can be accomplished at ⁇ closing feeding back of the lamp to a converter capacitor C of the switching converter without a Lampenerlöschen.
- the duty cycle of the injected current for the forward and rural negligencemuttechnik is chosen such that the commutation current is adjusting heating the electrodes of the lamp Arnold Böcklin sufficient for the subsequent ⁇ sequent feeding back of the lamp to a converter capacitor C of the switching converter without danger running a Lampenerlö ⁇ schens can be accomplished.
- the typical current run times for the lamp current commutation are approximately 20 ⁇ s and the switch-off or return lamp to the switch converter output for the continuation of the stationary forward or reverse operation can be after approximately 50 ⁇ s to 70 ⁇ s ⁇ is done.
- a resonant ignition sequence can be rea ⁇ linstrument.
- the lamp can still continue high-frequency drive via the still uncoupled half-bridge in a warm-up phase as needed until a coupling to the switching converter for receiving the
- Rectangle mode is displayed.
- Fig. 3a shows the relevant signals to explain the operation of the circuit arrangement according to the invention.
- the top curve 1 shows the constant intermediate circuit voltage U ZK in the amount of 400VDC, which is provided by the beaufak ⁇ torkorrekturscrien C_PFC.
- Curve 2 shows the constant mean voltage U C B of
- the voltage values of 300 V and 100 V are alternately produced and provided at its converter capacitor C alternately at a rate of 100 Hz, with which the lamp is fed in the two operating phase phases, forward operation and reverse operation.
- Curve 3 shows this alternating voltage U c at the capacitor C.
- the coupled to the output of the switching converter lamp is operated on the constant 20 OV voltage across the blocking capacitor C B out and thus experiences the differential voltage U L between C B and C, which is inverted in each case at 100V in each phase of operation.
- the curve 5 shows the self-adjusting lamp current I L analog to the lamp voltage U L at curve. 4
- Fig. 3b shows a detailed switching sequence of the circuit arrangement according to the invention in the commutation in the forward mode.
- the curve 1 shows the switching state or the gate voltage UQ_TRANS of the coupling transistor
- Curve 2 shows the switching state or the gate voltage UQ_COM_FW of the switching transistor Q_COM_FW.
- the curve 3 shows the switching state or the gate voltage UQ_COM_BW of the switching transistor Q_COM_BW.
- the curve 4 shows the pulsed lamp current I L on the lamp for initiating the forward operation. Which a ⁇ Deputy generating current pulse to the lamp produced as a result of the coupling of the lamp circuit through the switching transistor
- the curve 5 shows the pulse-shaped lamp current I L in the forward commutation in higher temporal resolution.
- the current direction at the lamp changes from -1A to + 2.5A within 20usec, which corresponds to a current commutation time of less than 20 is.
- the curve 6 shows the switching state or the gate voltage UQ_COM_FW of the switching transistor Q_COM_FW in higher zeitli ⁇ cher resolution.
- the forward commutation process is terminated after 70 is, in which the switch Q_COM_FW is opened again, wherein the lamp circuit is again coupled to the output capacitor C of the buck converter by the switch Q_COM_FW is closed again.
- FIG. 3c shows a detailed switching sequence of the inventive circuit arrangement during the commutation in reverse operation.
- the curve 1 shows the switching state or the gate voltage UQ_TRANS of the coupling transistor
- the Lam ⁇ pen Vietnamese via the coupling transistor Q_TRANS from the output of the switching converter for about 70 ⁇ is separated.
- the curve 2 shows the switching state or the gate voltage UQ_COM_FW of the switching transistor Q_COM_FW.
- the curve 3 shows the switching state or the gate voltage UQ_COM_BW of the switching transistor Q_COM_BW.
- the curve 4 shows the pulse-shaped lamp current I L for initiating the reverse operation.
- the curve 5 shows the pulse-shaped lamp current I L in the reverse commutation in higher temporal resolution.
- the current direction at the lamp changes from + 1A to -2.5A within 20usec, which corresponds to a current commutation time of less than 20 is.
- the curve 6 shows the switching state or the gate voltage UQ_COM_BW of the switching transistor Q_COM_BW in higher zeitli ⁇ cher resolution.
- the backward commutation process is terminated after 70 is, in which the switch Q_COM_BW is reopened, the lamp circuit is again coupled to the output capacitor C of the buck converter by the switch Q_COM_FW is closed again.
- this switching arrangement thus also has one switch less and is more cost-effective to manufacture.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2010/066966 WO2012062346A1 (de) | 2010-11-08 | 2010-11-08 | Schaltungsanordnung und verfahren zur schnellen kommutierung beim rechteckbetrieb von hochdruckentladungslampen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2526741A1 true EP2526741A1 (de) | 2012-11-28 |
| EP2526741B1 EP2526741B1 (de) | 2014-04-30 |
Family
ID=44624901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10779504.9A Not-in-force EP2526741B1 (de) | 2010-11-08 | 2010-11-08 | Schaltungsanordnung und verfahren zur schnellen kommutierung beim rechteckbetrieb von hochdruckentladungslampen |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2526741B1 (de) |
| WO (1) | WO2012062346A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW339496B (en) * | 1994-06-22 | 1998-09-01 | Philips Electronics Nv | Method and circuit arrangement for operating a high-pressure discharge lamp |
| EP0724823A1 (de) * | 1994-08-24 | 1996-08-07 | Koninklijke Philips Electronics N.V. | Schaltungsanordnung |
| DE102004020397A1 (de) * | 2004-04-23 | 2005-11-10 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Verfahren zum Betreiben einer Hochdruckentladungslampe |
| DE102005031835A1 (de) * | 2005-07-06 | 2007-01-18 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Vorrichtung zum Betreiben einer Hochdruckentladungslampe |
| DE102007060035A1 (de) * | 2007-12-05 | 2009-06-10 | Osram Gesellschaft mit beschränkter Haftung | Vorrichtung und Verfahren zum Betreiben einer Hochdruckentladungslampe |
| DE102008016888A1 (de) * | 2008-04-02 | 2009-10-08 | Osram Gesellschaft mit beschränkter Haftung | Schaltungsanordnung und Verfahren zum Erzeugen einer Lampenspannung |
| DE102009016579A1 (de) * | 2009-04-06 | 2010-10-14 | Osram Gesellschaft mit beschränkter Haftung | Schaltungsanordnung und Verfahren zum Betreiben einer Hochdruckentladungslampe |
-
2010
- 2010-11-08 EP EP10779504.9A patent/EP2526741B1/de not_active Not-in-force
- 2010-11-08 WO PCT/EP2010/066966 patent/WO2012062346A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2012062346A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012062346A1 (de) | 2012-05-18 |
| EP2526741B1 (de) | 2014-04-30 |
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