EP0021508B1 - Circuit d'allumage et de commande pour lampes à décharge dans un gaz et/ou une vapeur - Google Patents

Circuit d'allumage et de commande pour lampes à décharge dans un gaz et/ou une vapeur Download PDF

Info

Publication number
EP0021508B1
EP0021508B1 EP80200547A EP80200547A EP0021508B1 EP 0021508 B1 EP0021508 B1 EP 0021508B1 EP 80200547 A EP80200547 A EP 80200547A EP 80200547 A EP80200547 A EP 80200547A EP 0021508 B1 EP0021508 B1 EP 0021508B1
Authority
EP
European Patent Office
Prior art keywords
resistor
lamp
ptc
circuit arrangement
control 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.)
Expired
Application number
EP80200547A
Other languages
German (de)
English (en)
Other versions
EP0021508A1 (fr
Inventor
Hans Dr. Bex
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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 Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0021508A1 publication Critical patent/EP0021508A1/fr
Application granted granted Critical
Publication of EP0021508B1 publication Critical patent/EP0021508B1/fr
Expired legal-status Critical Current

Links

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
    • H05B41/36—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
    • H05B41/3927—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by pulse width modulation
    • 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
    • H05B41/042—Starting switches using semiconductor devices
    • H05B41/044—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes
    • H05B41/046—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes using controlled semiconductor devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/07—Starting and control circuits for gas discharge lamp using transistors

Definitions

  • the invention relates to a circuit arrangement for igniting and operating a gas and / or vapor discharge lamp with preheatable electrodes, between the free ends of which there is an electrical connection at least during the ignition process, with a ballast according to the chopper principle, which is one in series with the lamp , controlled by a control circuit electronic switch as a chopper, an input voltage for the control circuit being taken from a resistor arranged in the lamp circuit.
  • the discharge lamp is fed at a frequency between approximately 400 Hz and 30 kHz in accordance with the switching frequency of the electronic switch.
  • the electronic switch is already in operation during the heating of the lamp electrodes.
  • the heating current is only limited by the resistance of the heating coil itself.
  • the heating current is briefly up to 5 times as large as the heating current in 50 Hz operation; this destroys the heating coil relatively quickly.
  • the discharge lamp ignites at an indefinite point in time when there is both sufficient heating and the ignition voltage is high enough. This time lies between the pure cold start and the start with preheated electrodes. This is also a condition that adversely affects the life of the lamp.
  • the invention has for its object to provide a circuit arrangement for igniting and operating a gas and / or vapor discharge lamp, in which the life of this lamp is practically not affected by the preheating of the lamp electrodes.
  • a resistor with a positive temperature coefficient is connected in series with an ohmic resistor in parallel with the electronic switch, and the value of the ohmic resistor is 8 to 12 times greater than that Cold resistance of the PTC resistor and that the input voltage of the control circuit is taken from the PTC resistor.
  • PTC positive temperature coefficient
  • the control circuit of the electronic switch does not receive enough voltage during preheating of the lamp electrodes to actuate the switch. Therefore, the lamp electrodes are e.g. heated at 50 Hz. The heating current is limited by the ohmic resistance. After some time, about 112 seconds, the voltage at the input of the control circuit is high enough that the electronic switch, e.g. starts working at around 16 kHz. At the same time, the discharge lamp ignites without flickering.
  • the circuit arrangement according to the invention works in this case for preheating the lamp electrodes at 50 Hz; only then does switching operation begin at a much higher frequency. This has an advantageous effect on the life of the lamp.
  • the figure shows a circuit arrangement for igniting and operating a gas discharge lamp.
  • the terminal 1 and 2 designate input terminals for connection to an AC voltage network of 220 V, 50 Hz.
  • the terminal 1 is connected via a coil 3 to a preheatable electrode 4 of a low-pressure mercury vapor discharge lamp 5.
  • the second preheatable lamp electrode 6 is connected to a rectifier bridge 7, which contains four diodes 8, 9, 10 and 11.
  • the other side of the rectifier bridge 7 is connected to the input terminal 2 via a fuse 12.
  • a capacitor 13 is connected behind the coil 3, the other end of which is also connected to the input terminal 2.
  • Coil 3 and capacitor 13 form a low pass.
  • the free ends of the preheatable electrodes 4 and 6 are connected to one another via a choke coil 14; in their place can also be a switch that is only switched on during the preheating of the lamp electrodes.
  • a switching transistor 15 in series with a parallel combination which is common in power switching transistors and consists of a diode 16, a capacitor 17 and a coil 18.
  • the control circuit of the transistor 15 has one of a series circuit comprising a resistor 19, a resistor 20 and a capacitor 21 formed input circuit, which bridges the transistor 15 and the parallel combination 16 to 18.
  • a zener diode 22 and a smoothing capacitor 23 are connected in parallel with the series circuit comprising the resistor 20 and the capacitor 21.
  • the base of transistor 15 is connected via a diac 24 to the connection point of resistor 20 with capacitor 21 connected.
  • the base of transistor 15 is connected to the emitter of transistor 15 via a resistor 25 and a coil 26 lying in parallel therewith. The coils 18 and 26 are coupled together.
  • a resistor 27 with a positive temperature coefficient is connected in series with an ohmic resistor 28 which limits the lamp heating current and whose resistance value is 8 to 12 times greater than the cold resistance of the PTC resistor 27.
  • the PTC resistor 27 alone lies in parallel to the control circuit 19 to 26 of the switching transistor 15.
  • the parallel combination 16 to 18 and the two coils 18 and 26 coupled to one another serve exclusively to improve the switching behavior of the transistor 15, that is to say to reduce its power loss.
  • the diac 24 blocks again and causes the transistor 15 to also be blocked again. This switching process creates such a high ignition voltage at the choke coil 14 that the discharge lamp 5 can ignite.
  • the time constant C2, R20 is selected so that the desired pulse repetition frequency for the opening and closing of the switching transistor 15 results.
  • the pulse duty factor of the pulse train is set via the resistor 25, the base-emitter resistance of the transistor 15 and the coupling of the coils 18 and 26 so that the required lamp power is achieved.
  • the capacitor 13 represents a low-pass filter to prevent the high-frequency current pulses from being fed into the public supply network as a disturbance.
  • the 50 Hz oscillation can enter the circuit arrangement unhindered.
  • the components used had the following values: The pulse repetition rate was approximately 16 kHz. The duty cycle was 1: 7 on average. The overall efficiency was 92%.
  • An adaptation to a discharge lamp of a different power can be easily achieved by changing the pulse repetition frequency or the duty cycle.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Claims (1)

  1. Circuit d'allumage et de commande d'une lampe à décharge dans le gaz et/ou la vapeur munie, d'une part, d'électrodes préchauffables, entre les extrémités libres desquelles existe une connexion électrique durant l'opération d'allumage et, d'autre part, d'un appareillage auxiliaire selon le principe du hacheur, appareillage auxiliaire comportant comme hacheur un commutateur électronique monté en série avec la lampe et commandé par un circuit de commande, une tension d'entrée pour ce circuit de commande étant prélevée sur un circuit de courant de lampe, caractérisé en ce qu'en parallèle avec le commutateur électronique (15, 16 à 18), une résistance (27) à coefficient de température positif (CTP) est montée en série avec une résistance ohmique (28), en ce que la valeur de la résistance ohmique est 8 à 12 fois plus grande que la valeur à froid de la résistance CTP et en ce que la tension d'entrée du circuit de commande (19 à 26) du commutateur électronique est prélevée sur la résistance CTP.
EP80200547A 1979-06-15 1980-06-13 Circuit d'allumage et de commande pour lampes à décharge dans un gaz et/ou une vapeur Expired EP0021508B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2924069 1979-06-15
DE2924069A DE2924069C2 (de) 1979-06-15 1979-06-15 Schaltungsanordnung zum Zünden und Betrieb einer Gas- und/oder Dampfentladungslampe

Publications (2)

Publication Number Publication Date
EP0021508A1 EP0021508A1 (fr) 1981-01-07
EP0021508B1 true EP0021508B1 (fr) 1982-10-20

Family

ID=6073213

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80200547A Expired EP0021508B1 (fr) 1979-06-15 1980-06-13 Circuit d'allumage et de commande pour lampes à décharge dans un gaz et/ou une vapeur

Country Status (6)

Country Link
US (1) US4358711A (fr)
EP (1) EP0021508B1 (fr)
JP (1) JPS563996A (fr)
AT (1) AT378096B (fr)
CA (1) CA1149077A (fr)
DE (2) DE2924069C2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3047289A1 (de) * 1980-12-16 1982-07-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Zuendvorrichtung fuer eine niederdruckentladungslampe
US4686427A (en) * 1985-08-13 1987-08-11 Magnetek, Inc. Fluorescent lamp dimming switch
US4970437A (en) * 1989-07-10 1990-11-13 Motorola Lighting, Inc. Chopper for conventional ballast system
US5204587A (en) * 1991-02-19 1993-04-20 Magnetek, Inc. Fluorescent lamp power control
DE4425859A1 (de) * 1994-07-21 1996-01-25 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Betrieb einer oder mehrerer Niederdruckentladungslampen
FR2771589A1 (fr) * 1997-11-21 1999-05-28 Sgs Thomson Microelectronics Limiteur de courant pour lampe fluorescente
FR2771590B1 (fr) * 1997-11-21 2003-01-03 Sgs Thomson Microelectronics Circuit de commande de lampe fluorescente

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2263582A1 (de) * 1972-01-19 1973-07-26 Philips Nv Vorrichtung mit einer gas- und/oder dampfentladungslampe

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2034855A1 (de) * 1970-07-07 1972-01-27 Luehrs O Elektronische Zündeinrichtung fur Niederdruck Gasentladungslampen
DE2060474C3 (de) * 1970-12-09 1974-11-28 Brown, Boveri & Cie Ag, 6800 Mannheim Zündgerät für eine mit Vorschaltgerät betriebene Entladungslampe
FR2222823A2 (en) * 1973-03-21 1974-10-18 Radiotechnique Compelec Method of firing a fluorescent tube - uses relaxation circuit and bilateral conducting element
NL179622C (nl) * 1978-06-27 1986-10-01 Philips Nv Inrichting voor het ontsteken en voeden van ten minste een gas- en/of dampontladingsbuis.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2263582A1 (de) * 1972-01-19 1973-07-26 Philips Nv Vorrichtung mit einer gas- und/oder dampfentladungslampe

Also Published As

Publication number Publication date
JPS563996A (en) 1981-01-16
EP0021508A1 (fr) 1981-01-07
DE2924069C2 (de) 1982-05-13
ATA313980A (de) 1984-10-15
JPS6329800B2 (fr) 1988-06-15
AT378096B (de) 1985-06-10
DE3060970D1 (en) 1982-11-25
DE2924069A1 (de) 1980-12-18
US4358711A (en) 1982-11-09
CA1149077A (fr) 1983-06-28

Similar Documents

Publication Publication Date Title
DE2323011C3 (de) Schaltungsanordnung zur Zündung und zum Betrieb einer Gasentladungslampe
EP0120405B1 (fr) Dispositif d'allumage pour lampe de décharge à basse pression
DE3231939C2 (fr)
DE3108548C2 (de) Zündschaltung für eine Hochdruckmetalldampfentladungslampe
CH654709A5 (de) Zuendschaltung fuer eine hochdruckmetalldampfentladungslampe.
DE2116950C3 (de) Schaltungsanordnung zum Zünden und zum Betrieb von Gasentladungslampen
DE3046617C2 (fr)
DE2751464A1 (de) Starter zum zuenden einer gas- und/oder dampfentladungslampe
EP0614052B1 (fr) Appareil automatique d'allumage
EP0021508B1 (fr) Circuit d'allumage et de commande pour lampes à décharge dans un gaz et/ou une vapeur
DE1764995C3 (de) Schaltungsanordnung zur Zündung und Speisung einer Gas- und/oder Dampfentladungslampe
DE2827395A1 (de) Schaltungsanordnung zum zuenden einer elektrischen entladungslampe
DE3887262T2 (de) Wechselrichter zum Zünden und Speisen einer Gasentladungslampe.
DE2812623A1 (de) Zuendgeraet fuer eine hochdruckentladungslampe
DE69616451T2 (de) Umschaltanordnung
EP0111373B1 (fr) Dispositif de circuit pour mise en marche et fonctionnement de lampes de décharge à gaz et à haute pression
EP1181844A1 (fr) Procede et ballaste servant a alimenter un emetteur de rayonnement u.v. basse pression
EP0055995B1 (fr) Disposition de circuit d'allumage et fonctionnement d'une lampe de décharge à basse pression à partir d'une source de courant continu
DE2801939C2 (fr)
EP0111956B1 (fr) Disposition de circuit pour mettre en marche des lampes à décharge à haute pression
DE2808261C3 (de) Schaltungsanordnung zum Zünden und zum Betrieb einer Leuchtstofflampe mit vorheizbaren Elektroden an einem transistorisierten Wechselrichter
DE2604914C3 (de) Schaltungsanordnung zum Zünden und zum Betrieb einer Entladungslampe
DE2610944A1 (de) Leuchtstofflampen-vorschaltgeraet
DE2849064C2 (de) Zündschaltung für eine Gasentladungslampe
DE2647182C2 (de) Schaltungsanordnung zum Betrieb einer Hochdruckgasentladungslampe

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE FR GB NL

17P Request for examination filed

Effective date: 19810223

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE DE FR GB NL

REF Corresponds to:

Ref document number: 3060970

Country of ref document: DE

Date of ref document: 19821125

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19900525

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19900601

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19900626

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19900630

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19900824

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910613

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19910630

BERE Be: lapsed

Owner name: N.V. PHILIPS' GLOEILAMPENFABRIEKEN

Effective date: 19910630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19920101

GBPC Gb: european patent ceased through non-payment of renewal fee
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19920401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT