EP2289289A1 - Schaltungsanordnung und verfahren zum betreiben einer lichtquelle - Google Patents
Schaltungsanordnung und verfahren zum betreiben einer lichtquelleInfo
- Publication number
- EP2289289A1 EP2289289A1 EP08760995A EP08760995A EP2289289A1 EP 2289289 A1 EP2289289 A1 EP 2289289A1 EP 08760995 A EP08760995 A EP 08760995A EP 08760995 A EP08760995 A EP 08760995A EP 2289289 A1 EP2289289 A1 EP 2289289A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- frequency
- input
- output voltage
- circuit
- 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
- H05B41/295—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
-
- 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
Definitions
- the invention relates to a circuit arrangement and a method for operating at least one light source, in which an input voltage (U 1n) into a wechseiförmi ⁇ ge output voltage, wherein the wechsei ⁇ shaped output voltage of a power for operating at least one light source (5) provides.
- the invention is based on a method for operating a light source according to the preamble of the main claim.
- the Kunststofffre acid sequence of the inverter is modulated with an approximately sinusoidal signal gene, which is derived from the modulation of the A ⁇ gear AC voltage. This results in an improved electromagnetic compatibility behavior, but the method fails in one DC input voltage, which in turn results in a fixed-frequency operation.
- This object is achieved with respect to the method by a method for operating at least one gas discharge lamp, in which an input voltage is converted into an alternating output voltage, the alternating output voltage providing a power for operating at least one light source (5), and the frequency of the Output voltage is modulated with a triangular modulation signal when the input voltage ⁇ is a DC voltage.
- the frequency of the output voltage is modulated with a sinusoidal modulation signal
- the input voltage is a sinusoidal AC voltage
- an input AC voltage at is twice the frequency of the input AC voltage.
- the phase position of the modulation signal with respect to the input AC voltage is preferably chosen so that the crest factor of the output voltage substantially corresponds to the value V2. This results in a maximum amplitude of the AC input voltage at a maximum frequency of the AC output voltage.
- the output voltage is subject to amplitude modulation resulting from insufficient smoothing of the rectified AC input voltage.
- the frequency deviation of the Fre ⁇ quenzmodulation is adjusted so that the amplitude-dulation the output voltage is minimized.
- the frequency deviation of the frequency modulation is set so that an improved electromagnetic compatibility it is sufficient ⁇ .
- the valid limit values with regard to the electromagnetic compatibility can be met.
- the object is achieved with respect to the circuit arrangement by a circuit arrangement for operating at least one light source, with an input for inputting a constant or alternating voltage, and an output, which is connected to the light source, wherein the circuit arrangement, a method according to one or performs several of the above features.
- the circuit arrangement contains a power factor correction circuit, which preferably has a power factor correction circuit.
- identification circuit (12) which detects whether the input voltage ⁇ equal or bony is.
- the detection circuit (12) preferably includes a bandpass filter, a highpass filter or a lowpass filter. However, it may instead also have an edge detection device.
- the circuit arrangement includes a control circuit which preferably has an integrated component such as an ASIC.
- the control circuit may also have a microcontroller.
- the circuit arrangement preferably has a resonance circuit.
- FIG. 1 A flow chart of the method according to the invention.
- FIG. 3 The block diagram of a circuit arrangement according to the invention with a control circuit which has an ASIC.
- FIG. 1 shows a flow diagram of the invention shown SEN method. After starting, it is detected whether a DC or an AC voltage is present at the input of a circuit arrangement implementing the method according to the invention.
- the circuit arrangement has an output which operates at least one gas discharge lamp with an AC output voltage. If a DC voltage is present at the input, the alternating output voltage is frequency-modulated with a delta voltage. However, the alternating output voltage can also be frequency modulated with a sawtooth-shaped voltage. In the following, however, one always speaks of a triangular voltage, which hereby explicitly means a triangular and a sawtooth voltage.
- the frequency of the triangular modulation voltage is between 100 Hz and 3 kHz.
- a modulation voltage can be generated from this alternating voltage, by means of which the frequency modulation of the alternating output voltage takes place.
- the frequency of the modulation voltage is twice the frequency of the input AC voltage.
- the phase position of the modulation voltage with respect to the input AC voltage is set so that the frequency of the alternating voltage shaped output voltage is highest when the instantaneous value of the AC input voltage reaches a maximum.
- the frequency deviation of the alternating output voltage can be varied in different ways.
- One possibility is to compensate for the amplitude modulation of the wechsei ⁇ shaped output voltage resulting from the insufficient rectification of the input AC voltage by a suitable frequency deviation of the superimposed frequency modulation possible.
- This is possible in principle best if indeed a maximum of the instantaneous value of the output wechseiförmigen ⁇ voltage seen at a maximum of the instantaneous value of the input AC voltage from which the frequency of the wechseiförmigen output voltage is maximum.
- the frequency of the amplitude of denmodulation wechseiförmigen output voltage is inherently twice as high as the frequency of an AC voltage ⁇ gang.
- the frequency of the modulation signal is synchronous with the frequency of the amplitude modulation of the alternating output voltage, it follows that, with a minimum of the amplitude of the alternating output voltage, a minimum of the frequency of the alternating output voltage also occurs.
- the stroke of the frequency modulation can now be adjusted so that cancel the two effects of the amplitude and the frequency modulation on the output power, so that a very uniform power output is generated to the Gasentla ⁇ tion lamp which has a good quality of light result.
- Synchronized frequency modulation thus achieves two things at the same time: on the one hand a uniform light output and thus an improvement of the quality of light, on the other hand a distribution of the interference Frequencies on a wide frequency band to improve the electromagnetic compatibility of the circuit.
- Another possibility of varying the frequency deviation is the optimization of the electromagnetic compatibility of the circuit arrangement.
- the larger the frequency sweep the wider the frequency band on which interference occurs.
- the interferences per frequency are lower because the frequencies per unit time are less frequent. So that the frequency deviation can be set so that the current limit values for electromagnetic compatibility ⁇ friendliness be maintained safely.
- a DC voltage is input, can be derived from this no wechseiförmiges Modula ⁇ tion signal.
- a triangular-shaped modulation signal is generated by means of which the wech ⁇ seiförmige output voltage is frequency modulated.
- a triangular signal has the advantage of a direct ⁇ distribution of the frequencies of wechseiförmigen output voltage, so that an optimal distribution of the interference is achieved.
- FIG. 2 shows a block diagram of a circuit arrangement according to the invention, which carries out the method according to the invention.
- An input AC voltage U 1n is input to a power factor correction circuit 10.
- the power factor correction circuit 10 generates therefrom an amplitude-modulated intermediate circuit voltage which is output to a DC voltage intermediate circuit 30. This smoothes the modulated DC voltage and enters it in egg ⁇ nen inverter 20, which generates an amplitude and frequency modulated output voltage U out .
- This is passed through a resonant circuit 40 and operates a gas discharge lamp 5.
- the entire circuit arrangement is controlled by a control circuit 50.
- the control circuit 50 controls and regulates in particular the power factor correction circuit 10 and the inverter 20.
- the control circuit 50 includes an ASIC 54 which performs the control tasks.
- the detection of whether a uniform or a bump-shaped input voltage U 1n is applied to the circuit arrangement 1 is effected by a detection circuit 12 which is part of the power factor correction circuit and into which the input AC voltage U 1n or the rectified amplitude-modulated input AC voltage U 1n is input becomes.
- the detection circuit includes a bandpass filter, a high or low pass filter in the first embodiment.
- This modulation signal is a fixed frequency oscillator 55 is modulated, and the resultant frequency modulated signal is ⁇ give as a driving signal to the inverter 20 which drives ckentransistoren existing-nesting with this signal in the inverter.
- the detection circuit includes, instead of the band filter, an edge detecting means which detects whether U 1n is a same or a bob-shaped voltage. The rest of the procedure corresponds to the first embodiment.
- FIG. 3 shows a third embodiment of the inventive circuit 1.
- the control circuit 50 includes a microcontroller 52 instead of an ASIC 54.
- the microcontroller like the ASIC, performs the essential control and regulation tasks of the circuit arrangement.
- the detection circuit 12 has a band filter, and generates a detection signal which is input to the control circuit 50.
- the input signals are digitized via A / D converters, processed in the microcontroller 52 and connected via D / A converters the power factor correction circuit 10 and the inverter 20 are output.
- the frequency modulation is done with a digital algorithm.
- the triangular modulation voltage is also generated digitally by means of a table, for example, and then further processed.
- the detection circuit includes, instead of the band filter, an edge detection means which detects whether U 1n is a same or a bob-shaped voltage.
- the detection circuit generates the detection signal, which is A / D converted and then further processed in the microcontroller. The remainder of the procedure corresponds to the third embodiment.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2008/057466 WO2009149763A1 (de) | 2008-06-13 | 2008-06-13 | Schaltungsanordnung und verfahren zum betreiben einer lichtquelle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2289289A1 true EP2289289A1 (de) | 2011-03-02 |
| EP2289289B1 EP2289289B1 (de) | 2013-08-14 |
Family
ID=40466943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08760995.4A Active EP2289289B1 (de) | 2008-06-13 | 2008-06-13 | Schaltungsanordnung und verfahren zum betreiben einer lichtquelle |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20110163692A1 (de) |
| EP (1) | EP2289289B1 (de) |
| CN (1) | CN102067735B (de) |
| WO (1) | WO2009149763A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102316651A (zh) * | 2010-07-08 | 2012-01-11 | 皇家飞利浦电子股份有限公司 | 灯驱动器 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0059064B1 (de) * | 1981-02-21 | 1985-10-02 | THORN EMI plc | Anordnung zum Starten und Betreiben von Lampen |
| DE4301184C2 (de) * | 1993-01-19 | 1997-12-18 | B & S Elektronische Geraete Gm | Steuergerät für wenigstens eine Entladungslampe |
| EP0840537A1 (de) * | 1996-10-31 | 1998-05-06 | MAGNETEK S.p.A. | Vorschaltgerät für eine Hochleistungsentladungslampe |
| US6362575B1 (en) * | 2000-11-16 | 2002-03-26 | Philips Electronics North America Corporation | Voltage regulated electronic ballast for multiple discharge lamps |
| DE10216596A1 (de) * | 2002-04-15 | 2003-11-06 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Beleuchtungssystem |
| CN100531506C (zh) * | 2004-12-29 | 2009-08-19 | 浙江大学 | 一种电子镇流器及其工作频率选择方法 |
-
2008
- 2008-06-13 US US12/997,865 patent/US20110163692A1/en not_active Abandoned
- 2008-06-13 WO PCT/EP2008/057466 patent/WO2009149763A1/de not_active Ceased
- 2008-06-13 EP EP08760995.4A patent/EP2289289B1/de active Active
- 2008-06-13 CN CN200880129812.9A patent/CN102067735B/zh active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009149763A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009149763A1 (de) | 2009-12-17 |
| US20110163692A1 (en) | 2011-07-07 |
| CN102067735A (zh) | 2011-05-18 |
| CN102067735B (zh) | 2015-09-30 |
| EP2289289B1 (de) | 2013-08-14 |
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