EP2087777A1 - Montage électrique pour allumer une lampe à décharge - Google Patents

Montage électrique pour allumer une lampe à décharge

Info

Publication number
EP2087777A1
EP2087777A1 EP06819374A EP06819374A EP2087777A1 EP 2087777 A1 EP2087777 A1 EP 2087777A1 EP 06819374 A EP06819374 A EP 06819374A EP 06819374 A EP06819374 A EP 06819374A EP 2087777 A1 EP2087777 A1 EP 2087777A1
Authority
EP
European Patent Office
Prior art keywords
current
value
frequency
output
inverter
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.)
Withdrawn
Application number
EP06819374A
Other languages
German (de)
English (en)
Inventor
Christian Breuer
Martin BRÜCKEL
Andreas Huber
Ralf Hying
Bernhard Reiter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Osram GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Osram GmbH filed Critical Osram GmbH
Publication of EP2087777A1 publication Critical patent/EP2087777A1/fr
Withdrawn legal-status Critical Current

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
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • 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
    • 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

Definitions

  • the present invention relates to a circuit arrangement for igniting a discharge lamp having a first and a second input terminal for connecting an input voltage, an inverter having an input and an output, wherein the input is coupled to the first and the second input terminal, a first and a second output terminal for connecting a discharge lamp, a resonant inductor coupled between the output of the inverter and the ers ⁇ th output terminal, a resonant circuit comprising the resonant inductor, and a Regelvorrich ⁇ processing for controlling the frequency of the provided at the inverter output signal. It also relates to a method for igniting a discharge lamp on such a circuit arrangement.
  • the present invention relates generally to the Proble ⁇ matics the generation of a sufficiently high for igniting a discharge lamp voltage by means of exciting a resonant circuit in the region of its resonant frequency.
  • the output ⁇ voltage of the resonance circuit is in this case measured or over the entire swept result of tolerances possible range of resonant frequencies, ie, alternately first from smaller to larger frequencies and then from larger to smaller frequencies, etc ..
  • the output voltage of the Resonanzkrei ⁇ ses is measured, in particular using a voltage divider, in order to select the appropriate excitation frequency for the resonant circuit.
  • the sweep of the toleranzbe ⁇ adhered entire range of possible resonant frequencies leads to a low average output voltage and thus to a deterioration of the ignition conditions.
  • the object of the present invention is to develop the above-mentioned circuit arrangement or the aforementioned method such that a control to the resonant frequency of the resonant circuit for the ignition of a discharge lamp is made possible at a lower cost.
  • Such a shunt resistor for current measurement is in electronic ballasts for operating a discharge lamp, ie for controlling various operating parameters during continuous operation of the discharge lamp , anyway provided and according to the present invention can now also be used in the control in connection with the ignition of the discharge lamp.
  • an excitation with an odd fraction of the resonant frequency can take place, whereby the requirements with regard to the switching speed of the electronic switch of the inverter can be reduced.
  • the circuit arrangement further comprises a voltage converter, which is coupled between the first and the second input terminal and the input of the inverter, wherein the current measuring device is designed as a shunt and in Voltage converter is arranged, and wherein the voltage ⁇ converter is connected to a reference potential such that the current through the shunt is correlated with the current in the resonant circuit.
  • the control device comprises a first SpeI ⁇ chervortechnische for storing a correlated with a maximum of the current in the resonant circuit value, an Ver ⁇ equal means for comparing a resultant at the instantaneous frequency of the signal at the output of the inverter with the current in the resonant circuit korre ⁇ profiled Value with the maximum stored in the first memory device, and a writing device, which is designed for the case that at the momen ⁇ tanen frequency of the signal at the output of the inverter resulting, correlated with the current in the resonant circuit value is greater than that previously entered maximum, to enter this value in the first storage device.
  • This measure has the advantage that regardless of tolerances or changes due to temperature dependencies and the like as a control variable always optimally current value for the current (or a correlated size) in the resonant circuit of the circuit arrangement for the present circuit arrangement taking into account the existing environmental conditions the control is used to the resonance frequency.
  • control device further comprises a control device for controlling the frequency of the signal at the output of the inverter, a second memory device, in which a difference value is entered, wherein the comparison device is further designed, the difference between the stored in the first memory device maximum and at the current frequency of the signal at the output to form the inverter resultant value, and to compare it against the registered in the second storage device difference value, wherein the tax regulations direction is further adapted to change the frequency of the Sig ⁇ Nals at the output of the inverter as long as in a rich ⁇ tung to lower ie or increase until the difference is greater or greater than the entered difference value, and then again in the reverse direction to change, ie increase or decrease until the difference is again greater than or equal to the registered difference value.
  • the last-mentioned preferred embodiment moreover provides a suitable means for eliminating the influence of noise in the detection of a signal correlated with the current of the resonant circuit.
  • this noise may be on the order of 1 to 5% of the useful signal.
  • Another prior art related to the voltage measurement control algorithm known continuous frequency increase or continuous Fre ⁇ quenzerniedr Trent would then reverse already when it measures a lower value after passing through a maximum. These superiors hens as would the influence of the noise does not take into ⁇ into account and reaching the actual maximum would prevent resulting in a lower voltage-time area than the present invention ⁇ would give again and again.
  • the difference value is at most 50% of the maximum, preferably between 5 and 30% of the maximum.
  • the difference value after the maximum changes during the ignition as mentioned above, can also be determined based on an average of the maximum obtained from experience.
  • the frequency at the output of the inverter before ⁇ Trains t in jumps of more than 1 kHz, preferably changed a maximum of 50 Hz.
  • the time constant of the control device is at most 5 ms preferably, more preferably Hoechsmann ⁇ least 2 ms.
  • a particularly preferred embodiment of the method according to the invention comprises the following steps: a) measuring the instantaneous current value resulting at the instantaneous frequency; b) determining a difference between a stored current value corresponding to a current maximum of the current value and the current current value; bl) if the control is in progress from higher frequencies to lower frequencies: bll) if the difference is less than a stored difference value: Ernied ⁇ ring of the instantaneous frequency by a predetermined frequency value; bl2) if the difference is greater than or equal to a stored difference value: increase the mo- mentanen frequency by a predetermined frequency value; b2) if the control is running from smaller frequencies to larger frequencies: b21) if the difference is smaller than a stored difference value: increasing the current frequency by a predefinable frequency value; b22) if the difference is greater than or equal to a stored difference value: decreasing the instantaneous frequency by a predefinable frequency value; c) comparing the
  • the drop across the shunt voltage may be obtained at vorlie ⁇ constricting invention readily correlated therewith clamping ⁇ voltage values measured are evaluated and stored.
  • Figure 1 is a schematic representation of a circuit diagram of an embodiment of a circuit arrangement according to the invention.
  • Fig. 2 is a schematic illustration of the time course of the comparison voltage at the shunt resistor at the on ⁇ go, according to the prior art (dashed) and the procedure of the OF INVENTION ⁇ dung (solid line); and
  • FIG. 3 shows a signal flow graph which illustrates the procedure in the method according to the invention.
  • Fig. 1 shows a schematic representation of an embodiment of an inventive Heidelbergungsanord ⁇ tion.
  • U zw intermediate circuit voltage
  • a tensioning ⁇ -DC Converters which is herein exemplified as a buck actuator and a switch Sl, inductor Ll, diode Dl and a capacitor Cl environmentally sums.
  • an inverter which in the present example is designed in a full-bridge arrangement and comprises the switches S2, S3, S4 and S5.
  • the discharge lamp La ⁇ is coupled to the output of the inverter via a resonant circuit, said resonant circuit, the inductors L2, L3 and the capacitor C2.
  • the circuit arrangement further comprises a control device 10, which is dropped across a voltage converter arranged in the shunt resistor R S h voltage U RS hr ⁇ leads. It has four outputs to, as with the Arrows marked to control the switches S2, S3, S4, S5.
  • a first memory device 12, a comparison device 14, a writing device 16, a second memory device 18 and a control device 20 are provided, which will be discussed in more detail in connection with FIG.
  • the current in the resonant circuit flows through the sequence of elements S2, L2, C2, L3, S5, RSh at the time the switches S2 and S5 are closed.
  • the current flows through the sequence of elements S4, L3, C2, L2, S3, RSh.
  • Fig. 2 shows the time course of the voltage U RSh , which is correlated with the current in the resonant circuit .
  • a broken line shows the course which would result if a frequency range were continuously swept over that is set in such a way that the maximum is reached, taking into account noise, tolerance-related fluctuations and due to temperature dependencies.
  • a signal having the resonant frequency f res of the resonant circuit is provided at the output of Wech ⁇ selrichters. From point Pl to the point P2, the frequency is lowered, for example, where ⁇ at the maximum lowering is achieved by a superiors percentage value, for example 10% at the point P2.
  • the frequency of the signal at the output of the inverter is therefore 0.9 f res • From the point P2 - after reaching the minimum frequency mentioned - the frequency is continuously increased, at the point P3 again the resonance frequency f res is reached.
  • a further increase finally leads to point P4, at which the resonance frequency frequency by a predetermined amount, for example 10%, steps on ⁇ was.
  • the frequency is 1.1 fres • From the point P4, the frequency is again ernied ⁇ rigt, etc.
  • FIG. 3 shows a schematic representation of a signal flow graph for the method according to the invention.
  • the value of the current of the resonant circuit is measured and evaluated in the signal flow graph of FIG. 3, in the context of the present invention instead of the current values, other current values, in particular also voltage values, can be evaluated and evaluated are stored, which are correlated with the current in the resonant circuit.
  • step 110 the current value I-ist (f) of the current in the resonant circuit is measured as a function of the current frequency.
  • ent ⁇ expresses this in determining the voltage U RS h at the shunt resistor R S h is determined by the control device 10.
  • ⁇ ′d in step 120 in the comparison means the difference formed between the data stored in the first storage device 12 maximum value I max of the current in Reso ⁇ nanz Vietnamese and the resultant at the instantaneous frequency of the signal at the output of the inverter value I ls (f).
  • the maximum of the voltage U Rsh is stored in the first memory device 12.
  • step 130 If the control is being moved from higher frequencies to lower frequencies, in step 140, the difference I D iff previously determined is compared against egg ⁇ nen in the second storage device 18 stored difference value .DELTA.l. If the comparison shows that I D iff smaller .DELTA.l is, in step 150, the tax advantage ⁇ device 20 is caused to the frequency in order to lower a pre give ⁇ NEN frequency step .DELTA.f. However, if I D iff is greater than ⁇ l, then in step 160 control device 20 is caused to increase the frequency by ⁇ f.
  • step 130 determines whether I is smaller dlff .DELTA.l. If this is the case, the frequency is increased by ⁇ f in step 180. If the over ⁇ test in step 170 a no, so the frequency is decreased by .DELTA.f in step 190th.
  • steps 130 and 160 or 170 could be reversed in order to achieve the same result.
  • step 200 to determine whether a new maximum value is to be stored in the first memory device 12, it is checked whether the difference I D i ff is less than zero. If so, in step 210, the at the instantaneous frequency resulting current value I lst (f) as a new value I max stored in the first memory device 12. I is D iff greater than zero, there is not a new Maxi mum ⁇ , whereby the current value I ls (f) is discarded in step 220th Then, the method returns to step 110 to Mes ⁇ solution of value I lst resulting in a different frequency (f). These steps are repeated ⁇ until the ignition of the discharge lamp. As will be apparent to those skilled in the art, steps 130-190 and 200-220 may also be performed in parallel.
  • the continuous curve ⁇ train now shows the time course of the voltage U RSh in a circuit arrangement according to the invention.
  • the points P5, P6 and P7 indicate the reversal points when sweeping the frequency.
  • dargestell ⁇ th dashed curve has been with reference to in Fig. 2 to the state of running that was lowered the frequency of Pl to P2.
  • P5 indicates the point at which the frequency is already increased again in the procedure according to the present invention and is lowered again after passing through a local maximum of the voltage U Rsh at the shunt resistor R sh at point P6. From the point P7, therefore, the frequency is increased again.
  • the difference between the maximum value stored in the first memory device 12 and the current value reaches the value of the difference value stored in the second memory device 18 and thus triggers a reversal of the sweep process.
  • assessments of the curve according to the present Invention the minima actually achieved from each other, since they are always the same, stored in the second memory device 18 value ⁇ U RSh smaller than the previous maximum. It can also be clearly recognized that the curve according to the invention has a significantly greater voltage-time surface than the curve of the prior art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne un montage électrique pour allumer une lampe à décharge, comprenant : un premier et un deuxième branchements d'entrée pour raccorder une tension d'entrée ; un onduleur qui présente une entrée et une sortie, l'entrée étant couplée au premier et au deuxième branchements d'entrée ; un premier et un deuxième branchements de sortie pour le raccordement de la lampe à décharge (La) ; un self de résonance qui est couplé entre la sortie de l'onduleur et le premier branchement de sortie ; un circuit de résonance qui comprend le self de résonance ; et un dispositif de régulation (10) pour réguler la fréquence du signal fourni à la sortie de l'onduleur. Selon l'invention, le montage électrique comprend en outre un dispositif de mesure de courant qui est disposé pour mesurer un courant électrique (I<SUB>ist</SUB>(f)) qui est corrélé au courant dans le circuit de résonance, le dispositif de régulation (10) étant conçu pour réguler la fréquence à la sortie de l'onduleur en fonction du courant mesuré (I<SUB>ist</SUB>(f)). L'invention concerne en outre un procédé pour allumer une lampe à décharge par un tel montage électrique.
EP06819374A 2006-11-09 2006-11-09 Montage électrique pour allumer une lampe à décharge Withdrawn EP2087777A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2006/068302 WO2008055547A1 (fr) 2006-11-09 2006-11-09 Montage électrique pour allumer une lampe à décharge

Publications (1)

Publication Number Publication Date
EP2087777A1 true EP2087777A1 (fr) 2009-08-12

Family

ID=38222713

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06819374A Withdrawn EP2087777A1 (fr) 2006-11-09 2006-11-09 Montage électrique pour allumer une lampe à décharge

Country Status (7)

Country Link
US (1) US8143795B2 (fr)
EP (1) EP2087777A1 (fr)
JP (1) JP2010509718A (fr)
KR (1) KR20090079982A (fr)
CN (1) CN101523996A (fr)
TW (1) TW200833173A (fr)
WO (1) WO2008055547A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8434148B2 (en) * 2006-03-30 2013-04-30 Advanced Network Technology Laboratories Pte Ltd. System and method for providing transactional security for an end-user device
US9112897B2 (en) * 2006-03-30 2015-08-18 Advanced Network Technology Laboratories Pte Ltd. System and method for securing a network session
CN102884374B (zh) * 2009-11-02 2015-05-27 香港城市大学 用于驱动dc供电的照明设备的装置或电路
JP2012003899A (ja) * 2010-06-15 2012-01-05 Tdk-Lambda Corp 放電灯点灯装置
WO2013170432A1 (fr) * 2012-05-15 2013-11-21 General Electric Company Allumage résonant de lampes hid

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US4060752A (en) * 1976-03-01 1977-11-29 General Electric Company Discharge lamp auxiliary circuit with dI/dt switching control
DE3149526A1 (de) * 1981-12-14 1983-06-23 Philips Patentverwaltung Schaltungsanordnung zum betrieb von hochdruck-gasentladungslampen
NL8800015A (nl) * 1988-01-06 1989-08-01 Philips Nv Elektrische inrichting voor het ontsteken en voeden van een gasontladingslamp.
JP3484381B2 (ja) 1990-07-13 2004-01-06 株式会社日立コミュニケーションテクノロジー 着信方式
US5932976A (en) * 1997-01-14 1999-08-03 Matsushita Electric Works R&D Laboratory, Inc. Discharge lamp driving
DE69828484T2 (de) * 1997-04-17 2005-08-25 Toshiba Lighting & Technology Corp. Entladungslampe und beleuchtungsvorrichtung
WO2000018197A1 (fr) * 1998-09-18 2000-03-30 Knobel Ag Lichttechnische Komponenten Circuit pour faire fonctionner des lampes a decharge dans un gaz
JP2000156296A (ja) * 1998-11-20 2000-06-06 Casio Comput Co Ltd 陰極管駆動回路
US6020691A (en) * 1999-04-30 2000-02-01 Matsushita Electric Works R & D Laboratory, Inc. Driving circuit for high intensity discharge lamp electronic ballast
US6380694B1 (en) * 2000-09-22 2002-04-30 Matsushita Electric Works R & D Laboratory Variable structure circuit topology for HID lamp electronic ballasts
WO2003039206A1 (fr) * 2001-10-31 2003-05-08 Koninklijke Philips Electronics N.V. Circuit de protection
JP2003217888A (ja) * 2002-01-17 2003-07-31 Matsushita Electric Works Ltd 放電灯点灯装置
JP4135070B2 (ja) * 2002-08-30 2008-08-20 松下電工株式会社 放電灯点灯装置
US6864645B2 (en) * 2003-03-05 2005-03-08 Matsushita Electric Works, Ltd. Method and circuit for driving a gas discharge lamp
JP4241515B2 (ja) * 2004-06-10 2009-03-18 パナソニック電工株式会社 放電灯点灯装置及びプロジェクタ
JP4244893B2 (ja) * 2004-09-14 2009-03-25 セイコーエプソン株式会社 周波数制御による放電ランプの点灯

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Also Published As

Publication number Publication date
TW200833173A (en) 2008-08-01
JP2010509718A (ja) 2010-03-25
US20100045196A1 (en) 2010-02-25
WO2008055547A1 (fr) 2008-05-15
CN101523996A (zh) 2009-09-02
US8143795B2 (en) 2012-03-27
KR20090079982A (ko) 2009-07-22

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