EP0042583A1 - Schéma d'allumage et de fonctionnement pour une lampe à décharge à basse pression - Google Patents

Schéma d'allumage et de fonctionnement pour une lampe à décharge à basse pression Download PDF

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Publication number
EP0042583A1
EP0042583A1 EP81104650A EP81104650A EP0042583A1 EP 0042583 A1 EP0042583 A1 EP 0042583A1 EP 81104650 A EP81104650 A EP 81104650A EP 81104650 A EP81104650 A EP 81104650A EP 0042583 A1 EP0042583 A1 EP 0042583A1
Authority
EP
European Patent Office
Prior art keywords
ignition
operating
lamp
operating circuit
circuit according
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Withdrawn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
EP81104650A
Other languages
German (de)
English (en)
Inventor
Hans-Jürgen Dipl.-Ing. Fähnrich
Walter Mayer
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
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0042583A1 publication Critical patent/EP0042583A1/fr
Withdrawn legal-status Critical Current

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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
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • H05B41/18—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having a starting switch
    • H05B41/19—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having a starting switch for lamps having an auxiliary starting electrode

Definitions

  • the invention relates to an ignition and operating circuit for a low-pressure discharge lamp with preheatable electrodes, the burning voltage of which is less than 60 V, a current limiter being arranged in the operating circuit and a starting element being arranged in the preheating circuit for the lamp electrodes.
  • a choke coil is usually used as a current limiter and a glow starter as the starting element.
  • a relatively good preheating of the lamp electrodes and thus a long lamp life are achieved.
  • the long ignition time and the flickering up to the ignition of the lamp disturbs these circuit arrangements.
  • the disadvantages mentioned can be avoided by using, instead of the usual glow starter, a normally closed contact that opens after sufficient preheating - or a switching element with a comparable function - whereby at the same time a diode arranged in the preheating circuit biases the choke coil on one side, which leads to an increased preheating current.
  • the invention has for its object to provide an ignition and operating circuit for a low-pressure discharge lamp with a small operating voltage, which on the one hand can be accommodated in corresponding luminaire housings in a space-saving manner and on the other hand ensures quick and safe ignition.
  • an ignition and operating circuit with the features mentioned in the preamble of the main claim is characterized in that the current limiter consists of a series connection of an ohmic damping resistor and an operating capacitor and the starting element has at least one semiconductor component which is used for preheating and igniting the lamp ensures and switches to preheating at about four times the operating voltage.
  • the starting element can advantageously be a controlled triac or a symmetrically switching four-layer diode.
  • a switching element or a combination of electronic switching elements with a comparable function is also suitable.
  • the damping resistance and the operating capacitor are dimensioned so that the ratio of the peak value to the effective value of the lamp current is between 1.8 and 2.7.
  • the radio interference emanating from the low-pressure discharge lamp is kept away from the network by an interference suppression capacity.
  • a discharge resistor is connected in parallel with the operating capacitor in order to reduce any residual charge of the operating capacitor after the lamp has been switched off.
  • a further improvement in ignition can be achieved if an ignition aid is present in the middle of the low-pressure discharge lamp via a protective resistor.
  • One of the lines in the operating circuit is provided with a fuse element (e.g. fuse, fuse resistor), which means that. Circuit is put into a de-energized state in the event of overload.
  • the series circuit comprising a low-pressure discharge lamp and a damping resistor is preceded by a symmetrical doubler circuit.
  • the capacitors of the doubler circuit act simultaneously as operating capacitors and interference suppression capacitors. Since a pulsating direct current flows through the lamp in this operating mode, the heating electrode connected to the cathode of the rectifier diodes of the doubler circuit acts as an anode; the two current leads of the electrode acting as an anode can be short-circuited to avoid overheating of the anode.
  • the damping resistor is advantageously arranged in close proximity to the lamp cathode in order to counteract cataphoresis.
  • another ignition aid e.g. applied in the form of a covering, which is connected to a network side via a protective resistor.
  • the combination of a series connection of a damping resistor and an operating capacitor as a current limiter with a semiconductor element as the starting element, which switches to preheating mode at approximately four times the operating voltage, is particularly suitable for low-pressure discharge lamps with short discharge arcs and an operating voltage of less than 60 V.
  • the circuit enables good preheating of the lamp electrodes, which achieves a long lamp life and ensures an almost instantaneous, flicker-free ignition of the lamp.
  • the current limiter consisting of damping resistor and operating capacitor, is - on the one hand - less expensive to manufacture than conventional choke coils and on the other hand has the advantage of a small volume and light weight, which enables use in small luminaire housings.
  • the ignition and operating circuit according to the invention is particularly suitable for compact low-pressure discharge lamps, for example in a single-socket version, in which the ignition and operating circuit forms a structural unit with the lamp.
  • Such lamps are suitable for direct use in lamp sockets otherwise only intended for incandescent lamps.
  • the symmetrical doubler circuit When using the symmetrical doubler circuit, the 50 Hz flicker that can otherwise be seen in low-pressure discharge lamps is avoided. Good interference suppression is guaranteed by the capacitors connected in series.
  • a series circuit consisting of a damping resistor 2 (glazed wire resistor 51 ohm / 7 W) and an operating capacitor 3 (6 ⁇ F / 220 V ⁇ ) acting as a capacitive series resistor is arranged as a current limiter.
  • the low-pressure discharge lamp 1 has a burning voltage of approximately 50 V at a supply voltage of 220 V / 50 Hz.
  • the heating circuit for the electrodes 4, 5 of the lamp 1 contains two symmetrically switching four-layer diodes 6 (Sidac K 1 V 12) lying in series, one of which Switching voltage of 240 V together and are particularly suitable for igniting lamps.
  • An interference suppression capacitor 7 (47 nF / 250 V ⁇ ) is connected in parallel to the series connection of lamp 1 and operating capacitor 3.
  • a discharge resistor 8 (1 M ohm / 0.3 W) is connected in parallel with the operating capacitor 3.
  • the ignition aid 9 consists of a self-adhesive, 20 x 25 mm large aluminum foil.
  • a fuse element 12 (solderable fuse 1A slow) is arranged in a supply line.
  • the connection terminals 13, 14 represent the connection contacts for the supply voltage.
  • All switching elements 2 to 12 are in a lamp housing (not shown) installed or are arranged in a housing (not shown) which, together with the lamp 1 and a lamp base (not shown), forms a compact lamp which can be used directly in a lamp socket which is otherwise provided for incandescent lamps.
  • the low-pressure discharge lamp 1 is operated with a symmetrical doubler circuit. Parts corresponding to FIG. 1 are given the same designations.
  • the diodes 15, 16 (type 1N4007) in this circuit arrangement cause the two capacitors 17, 18 to work alternately as operating capacitors with each half-wave of the alternating current.
  • the capacitors 17, 18 are therefore of the same design (5.2 ⁇ F / 400 Y).
  • the positive half-wave at the connection terminal 13 the capacitor 17 lies with the lamp 1 and the damping resistor 2 in series.
  • the current direction in the lamp 1 runs from the electrode 4 to the electrode 5.
  • the capacitor 18 forms a series connection with the damping resistor 2 and the lamp 1.
  • the current direction in the fluorescent lamp 1 runs from the electrode 4 to the electrode 5, as in the previous half-wave.
  • the electrode 4 thus becomes the anode and can be short-circuited with a bridge 19.
  • a further ignition aid 20 is provided in addition to the ignition aid 9 at the cathode-side lamp end, which is used as e.g. Foil is wrapped around the lamp melt and is connected to a protective resistor 21 (1 M ohm / 0.3 W) at the node 11 of the two capacitors 17, 18.
  • the capacitors 17, 18 also act as interference suppression capacitors.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
EP81104650A 1980-06-19 1981-06-16 Schéma d'allumage et de fonctionnement pour une lampe à décharge à basse pression Withdrawn EP0042583A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3022930 1980-06-19
DE19803022930 DE3022930A1 (de) 1980-06-19 1980-06-19 Zuend- und betriebsschaltung fuer eine niederdruckentladungslampe

Publications (1)

Publication Number Publication Date
EP0042583A1 true EP0042583A1 (fr) 1981-12-30

Family

ID=6104952

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81104650A Withdrawn EP0042583A1 (fr) 1980-06-19 1981-06-16 Schéma d'allumage et de fonctionnement pour une lampe à décharge à basse pression

Country Status (3)

Country Link
EP (1) EP0042583A1 (fr)
JP (1) JPS5727599A (fr)
DE (1) DE3022930A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139022A (en) * 1983-04-26 1984-10-31 Gen Electric Ballast circuit for lamps with low voltage gas discharge tubes
DE3603084A1 (de) * 1986-02-01 1987-08-06 Korte Licht Schaltung zum betrieb einer leuchtstofflampe
GB2240887A (en) * 1990-02-07 1991-08-14 Valmont Industries A circuit for starting and operating fluorescent lamps

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10028657A1 (de) * 2000-06-09 2001-12-13 Hella Kg Hueck & Co Verfahren und Schaltungsanordnung zur Reduzierung des Quecksilberkondensats auf den Elektroden einer Xenonlampe in einem Kraftfahrzeug

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3636406A (en) * 1969-04-19 1972-01-18 Bosch Photokino Gmbh Electronic flash unit
US3638070A (en) * 1969-10-17 1972-01-25 Richard W Powell Fluorescent lamp starting and control circuit
DE2306123A1 (de) * 1973-02-08 1974-08-15 Smoljanskij Zuendeinrichtung fuer leuchtstoffroehren mit gluehelektroden
US3851209A (en) * 1972-02-07 1974-11-26 Shindengen Electric Mfg Discharge lamp starting apparatus
AT331353B (de) * 1971-05-24 1976-08-25 Voegeli Ernst Vorschaltgerat fur gasentladungslampen
DE2165783B2 (de) * 1971-12-30 1976-08-26 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zum zuenden von entladungslampen
DE2606136A1 (de) * 1976-02-17 1977-08-18 Karlheinz Ing Grad Stein Leuchtstofflampen-direkt-starter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3636406A (en) * 1969-04-19 1972-01-18 Bosch Photokino Gmbh Electronic flash unit
US3638070A (en) * 1969-10-17 1972-01-25 Richard W Powell Fluorescent lamp starting and control circuit
AT331353B (de) * 1971-05-24 1976-08-25 Voegeli Ernst Vorschaltgerat fur gasentladungslampen
DE2165783B2 (de) * 1971-12-30 1976-08-26 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zum zuenden von entladungslampen
US3851209A (en) * 1972-02-07 1974-11-26 Shindengen Electric Mfg Discharge lamp starting apparatus
DE2306123A1 (de) * 1973-02-08 1974-08-15 Smoljanskij Zuendeinrichtung fuer leuchtstoffroehren mit gluehelektroden
DE2606136A1 (de) * 1976-02-17 1977-08-18 Karlheinz Ing Grad Stein Leuchtstofflampen-direkt-starter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139022A (en) * 1983-04-26 1984-10-31 Gen Electric Ballast circuit for lamps with low voltage gas discharge tubes
DE3603084A1 (de) * 1986-02-01 1987-08-06 Korte Licht Schaltung zum betrieb einer leuchtstofflampe
GB2240887A (en) * 1990-02-07 1991-08-14 Valmont Industries A circuit for starting and operating fluorescent lamps
GB2240887B (en) * 1990-02-07 1994-09-07 Valmont Industries A circuit for starting and operating fluorescent lamps

Also Published As

Publication number Publication date
DE3022930A1 (de) 1982-01-07
JPS5727599A (en) 1982-02-13

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

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AK Designated contracting states

Designated state(s): CH DE FR GB IT

17P Request for examination filed

Effective date: 19820616

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

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18D Application deemed to be withdrawn

Effective date: 19831220

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FAEHNRICH, HANS-JUERGEN, DIPL.-ING.

Inventor name: MAYER, WALTER