EP1087644A1 - Perfectionnements à la commande de l'alimentation de lampes à décharge notamment de projecteurs de véhicule automobile - Google Patents
Perfectionnements à la commande de l'alimentation de lampes à décharge notamment de projecteurs de véhicule automobile Download PDFInfo
- Publication number
- EP1087644A1 EP1087644A1 EP00402459A EP00402459A EP1087644A1 EP 1087644 A1 EP1087644 A1 EP 1087644A1 EP 00402459 A EP00402459 A EP 00402459A EP 00402459 A EP00402459 A EP 00402459A EP 1087644 A1 EP1087644 A1 EP 1087644A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- converter
- power
- lamp
- continuous
- input
- 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 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 abstract description 11
- 238000004870 electrical engineering Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
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
Definitions
- the present invention relates to the control of the supply of discharge lamps, in particular for motor vehicle headlamps.
- this comprises a DC / DC converter 1, which supplies a DC / AC converter 2 which itself supplies a discharge lamp 3.
- the DC / DC converter 1 includes for example a transformer T and a switch Q1 which controls the supply of the primary of transformer T, this switch Q1 being itself controlled by a regulator 4.
- the switches, referenced by Q2, of the H-bridge which constitutes the 2 DC / AC converter are controlled by a circuit control 5 with clock.
- the switching frequency of the converter switches DC / AC is around 200 Hz to 1 kHz.
- An object of the invention is to propose a command which allows eliminate or at least greatly reduce this electromagnetic noise.
- a solution to reduce the electromagnetic noise generated by the alternative supply of a discharge lamp would therefore be modify the control of the switches of its converter continuous / alternating, to broaden its switching frequency spectrum.
- the invention proposes a method for controlling a device for supplying a discharge lamp, in particular a projector motor vehicle, said power supply device comprising a DC / AC converter, which modulates over time the power supply supplied to said DC / AC converter.
- the supply power supplied to the DC / AC converter is modulated in a sequence pseudo-random.
- Such a method has the advantage of using spreading spectrum which allows noise reduction or suppression electromagnetic and this without modifying the control of DC / AC converter switches.
- the invention further provides a lamp supply device for motor vehicle discharge comprising a converter continuous / alternating and means for generating a power supply which is transmitted to the input of the DC / AC converter, in which said means include means for modulating said power feed.
- the means for generating the power of power which is transmitted to the input of the DC / AC converter include a DC / DC converter and regulating means and said regulation means control the DC / DC converter so that it delivers modulated power.
- the means for generating the supply power which is transmitted at the input of the DC / AC converter have a DC / DC converter and the device includes means for add to the output power of the DC / DC converter a modulated differential power.
- the regulator 4 controls the transistor Q1 of the DC / DC converter 1, so that what it delivers at the input of the DC / AC converter 2 a power P ⁇ ⁇ P, where P is the average power to be delivered to the lamp 3 and where ⁇ ⁇ P is a modulation added to the power delivered to the DC / AC converter to widen the spectrum of the circulating current in the discharge lamp 3.
- this variant is of an embodiment particularly advantageous, insofar as it requires only one simple re-programming of the power regulator 4.
- the modulation of power will be done in a pseudo-random sequence.
- the differential power can be more or minus 500 mw for average power output from the converter continuous / continuous of the order of 35 w.
- the modulation of power may not be generated by regulator 4, but may be generated by independent means (module 6 in FIG. 3) and added to analog way at the output of the DC / AC converter 2.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- Dc-Dc Converters (AREA)
- Inverter Devices (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
Description
- « The Effect of Carrier Frequency Modulation of PWM Waveforms on Conducted EMC Problems in switched Mode Power Supplies » - David Stone & Barry Chambers, University of Sheffield, Department of Electronic and Electrical Engineering ; EPE Journal, vol.5 n°3/4, January 1996 ;
- « Effect of Spread-spectrum Modulation of Switched Mode Power Converter PWM Carrier Frequencies on Conducted EMI » - David Stone & Barry Chambers, University of Sheffield, Department of Electronic and Electrical Engineering; IEE 16 March 1995, Electronics Letters n° 19950543 ;
- « Random Carrier Frequency Modulation of EMC Problems in Switched Mode Power Supplies » - David Stone, Barry Chambers & David Howe, University of Sheffield, Department of Electronic and Electrical Engineering ; IEEE Catalogue n°95TH8025 1995.
- la figure 1, déjà analysée, est une représentation schématique d'un dispositif d'alimentation de lampe à décharge ;
- la figure 2 représente schématiquement un mode de réalisation possible pour l'invention ;
- la figure 3 représente schématiquement un autre mode de réalisation possible pour l'invention.
Claims (5)
- Procédé pour la commande d'un dispositif d'alimentation d'une lampe à décharge notamment de projecteur de véhicule automobile, ledit dispositif d'alimentation comportant un convertisseur continu/alternatif, caractérisé en ce qu'on module dans le temps la puissance d'alimentation fournie audit convertisseur continu/alternatif.
- Procédé selon la revendication 1, caractérisé en ce que la puissance d'alimentation fournie au convertisseur continu/alternatif est modulée selon une séquence pseudo-aéatoire.
- Dispositif d'alimentation d'une lampe à décharge notamment de projecteur de véhicule automobile comporte un convertisseur continu/alternatif et des moyens pour générer une puissance d'alimentation qui est transmise en entrée du convertisseur continu/alternatif, caractérisé en ce que lesdits moyens comportent des moyens pour moduler ladite puissance d'alimentation.
- Dispositif selon la revendication 3, caractérisé en ce que les moyens pour générer la puissance d'alimentation qui est transmise en entrée du convertisseur continu/alternatif comportent un convertisseur continu/continu et des moyens de régulation et en ce que lesdits moyens de régulation commandent le convertisseur continu/continu de façon à ce qu'il délivre une puissance modulée.
- Dispositif selon la revendication 3, caractérisé en ce que les moyens pour générer la puissance d'alimentation qui est transmise en entrée du convertisseur continu/alternatif comportent un convertisseur continu/continu et en ce que ledit dispositif comporte des moyens pour additionner à la puissance en sortie du convertisseur continu/continu une puissance différentielle modulée.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9912114 | 1999-09-27 | ||
FR9912114A FR2799062B1 (fr) | 1999-09-27 | 1999-09-27 | Perfectionnements a la commande de l'alimentation de lampes a decharge notamment de projecteur de vehicule automobile |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1087644A1 true EP1087644A1 (fr) | 2001-03-28 |
EP1087644B1 EP1087644B1 (fr) | 2006-11-02 |
Family
ID=9550349
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00402459A Expired - Lifetime EP1087644B1 (fr) | 1999-09-27 | 2000-09-06 | Perfectionnements à la commande de l'alimentation de lampes à décharge notamment de projecteurs de véhicule automobile |
Country Status (6)
Country | Link |
---|---|
US (1) | US6556463B1 (fr) |
EP (1) | EP1087644B1 (fr) |
JP (1) | JP4542251B2 (fr) |
DE (1) | DE60031620T2 (fr) |
ES (1) | ES2275478T3 (fr) |
FR (1) | FR2799062B1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100437369B1 (ko) | 2001-01-10 | 2004-06-25 | 삼성광주전자 주식회사 | 진공청소기의 사이클론 집진장치 |
WO2006000932A1 (fr) * | 2004-06-21 | 2006-01-05 | Koninklijke Philips Electronics N.V. | Procede et circuit de pilotage pour la mise en oeuvre d'une lampe a decharges de haute intensite |
FR2881016B1 (fr) * | 2005-01-17 | 2007-03-16 | Valeo Vision Sa | Ballast de lampe a decharge notamment pour projecteur de vehicule |
BRPI0601239A (pt) * | 2006-04-06 | 2007-12-04 | Univ Fed De Santa Catarina Ufsc | alimentação pulsada em alta freqüência das lámpadas de descarga |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0291223A1 (fr) * | 1987-05-12 | 1988-11-17 | THORN EMI plc | Alimentation de courant |
EP0744883A1 (fr) * | 1995-05-23 | 1996-11-27 | PRÄZISA Industrieelektronik GmbH | Dispositif et procédé de commande d'une lampe haute pression |
EP0785702A2 (fr) * | 1996-01-16 | 1997-07-23 | Osram Sylvania Inc. | Méthode et appareil pour alimenter une lampe à décharge |
EP0944294A2 (fr) * | 1998-03-18 | 1999-09-22 | Matsushita Electric Industrial Co., Ltd. | Appareil pour alimenter une lampe à décharge |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3737756A (en) * | 1972-05-15 | 1973-06-05 | Bell Telephone Labor Inc | Converter circuit with balanced parallel switching paths |
JPH0321988U (fr) * | 1989-07-11 | 1991-03-06 | ||
CA2056010C (fr) * | 1990-11-27 | 1997-05-27 | Minoru Maehara | Convertisseur pour alimentation en courant avec facteur de puissance eleve |
JPH0855685A (ja) * | 1994-08-15 | 1996-02-27 | Matsushita Electric Works Ltd | 電源装置 |
US5696670A (en) * | 1995-05-26 | 1997-12-09 | Webster Heating And Specialty Products, Inc. | Power supply for arc-discharge load |
DE69626796T2 (de) * | 1995-12-08 | 2004-02-12 | Koninklijke Philips Electronics N.V. | Vorschaltgerät |
JPH11187662A (ja) * | 1997-12-24 | 1999-07-09 | Isuzu Motors Ltd | Dc−dcコンバータ |
US5936357A (en) * | 1998-07-24 | 1999-08-10 | Energy Savings, Inc. | Electronic ballast that manages switching frequencies for extrinsic purposes |
US6144172A (en) * | 1999-05-14 | 2000-11-07 | Matsushita Electric Works R&D Laboratory, Inc. | Method and driving circuit for HID lamp electronic ballast |
-
1999
- 1999-09-27 FR FR9912114A patent/FR2799062B1/fr not_active Expired - Fee Related
-
2000
- 2000-09-06 DE DE60031620T patent/DE60031620T2/de not_active Expired - Lifetime
- 2000-09-06 ES ES00402459T patent/ES2275478T3/es not_active Expired - Lifetime
- 2000-09-06 EP EP00402459A patent/EP1087644B1/fr not_active Expired - Lifetime
- 2000-09-26 JP JP2000292475A patent/JP4542251B2/ja not_active Expired - Fee Related
- 2000-09-27 US US09/670,711 patent/US6556463B1/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0291223A1 (fr) * | 1987-05-12 | 1988-11-17 | THORN EMI plc | Alimentation de courant |
EP0744883A1 (fr) * | 1995-05-23 | 1996-11-27 | PRÄZISA Industrieelektronik GmbH | Dispositif et procédé de commande d'une lampe haute pression |
EP0785702A2 (fr) * | 1996-01-16 | 1997-07-23 | Osram Sylvania Inc. | Méthode et appareil pour alimenter une lampe à décharge |
EP0944294A2 (fr) * | 1998-03-18 | 1999-09-22 | Matsushita Electric Industrial Co., Ltd. | Appareil pour alimenter une lampe à décharge |
Non-Patent Citations (1)
Title |
---|
STORMBERG H -P ET AL: "EXCITATION OF ACOUSTIC INSTABILITIES IN DISCHARGE LAMPS WITH PULSEDSUPPLY VOLTAGE", LIGHTING RESEARCH AND TECHNOLOGY,GB,ILLUMINATING ENGINEERING SOCIETY, LONDON, vol. 15, no. 3, 1 March 1983 (1983-03-01), pages 127 - 132, XP002052920, ISSN: 0024-3426 * |
Also Published As
Publication number | Publication date |
---|---|
FR2799062A1 (fr) | 2001-03-30 |
ES2275478T3 (es) | 2007-06-16 |
DE60031620D1 (de) | 2006-12-14 |
EP1087644B1 (fr) | 2006-11-02 |
FR2799062B1 (fr) | 2001-12-21 |
JP2001157463A (ja) | 2001-06-08 |
JP4542251B2 (ja) | 2010-09-08 |
US6556463B1 (en) | 2003-04-29 |
DE60031620T2 (de) | 2007-09-06 |
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