EP0114370A1 - Verfahren zum Betreiben einer Gasentladungslampe - Google Patents

Verfahren zum Betreiben einer Gasentladungslampe Download PDF

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Publication number
EP0114370A1
EP0114370A1 EP83112933A EP83112933A EP0114370A1 EP 0114370 A1 EP0114370 A1 EP 0114370A1 EP 83112933 A EP83112933 A EP 83112933A EP 83112933 A EP83112933 A EP 83112933A EP 0114370 A1 EP0114370 A1 EP 0114370A1
Authority
EP
European Patent Office
Prior art keywords
lamp
current
voltage
frequency
resonant 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.)
Withdrawn
Application number
EP83112933A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ali-Ihsan Söylemez
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0114370A1 publication Critical patent/EP0114370A1/de
Withdrawn legal-status Critical Current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
    • H05B41/26—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
    • H05B41/282—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
    • H05B41/2825—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 by means of a bridge converter in the final stage

Definitions

  • the invention relates to a method for operating a gas discharge lamp, in particular fluorescent lamp, in that a semiconductor chopper generates a high-frequency alternating voltage from a direct voltage, which is fed into a series resonant circuit formed from a capacitor connected in parallel to the discharge path of the lamp and a choke, which series resonant circuit has the required ignition voltage supplies for the discharge lamp, and in which the lamp current is limited by the choke during rated operation.
  • the frequency difference between the nominal operating frequency for the discharge lamp and the resonance frequency of the unloaded resonant circuit is so small that an oscillating circuit current occurs during the ignition phase, which is five to ten times higher than the nominal operating current.
  • a high resonant circuit current must flow. to generate the ignition voltage on the lamp. All components through which this high resonant circuit current flows during the start-up phase must be dimensioned accordingly for this current.
  • the resonant circuit current in nominal operation is only a fraction of the current during ignition, the components required for nominal operation are oversized.
  • the object of the invention is therefore to provide a method of the type mentioned in the introduction, in which the current stress on the components in the power section of an electronic ballast for gas discharge lamps is reduced during the ignition phase.
  • This object is achieved in that the frequency of the AC voltage before ignition of the lamp is chosen higher and after ignition of the lamp in nominal operation lower than the resonance frequency of the undamped resonant circuit and that the frequency spacing is chosen so large that the resonant circuit current during the ignition phase at most three times the nominal operating current.
  • a start-up circuit 18 is acted upon, which the high-frequency self-oscillation of a semiconductor chopper; which consists of a transistor half-bridge circuit of the two power MOS FETs 4 and 8, initiates.
  • a rectangular or a trapezoidal high-frequency AC voltage caused by the capacitor 2 with the amplitude + 1/2 U E ' is generated, the oscillation of which is maintained by the feedback by means of the current transformer 7.
  • the resonant circuit connected via the current transformer 7 to the center tap of the transistor half-bridge circuit, consisting of the inductor 12 and the capacitor 13, causes the discharge lamp 16 a voltage increase by resonance, whereby the lamp 16 is ignited. After ignition, the voltage on the lamp collapses to the operating voltage, the operating point being determined by the choke 12 as a function of the amplitude and frequency of the AC voltage.
  • the capacitor 17 prevents possible DC components in the lamp 16.
  • the start-up circuit 18 consists for example of the series connection of a resistor and a capacitor, which are connected in parallel to the capacitor 1.
  • a diac is connected between the center tap of this RC element and the gate of transistor 8.
  • the RC element and the diac thus represent a sawtooth generator, the frequency of which depends on the input voltage. If the input voltage U E is now applied, the capacitor of the starting circuit is charged via the resistor until the voltage at the capacitor reaches the breakdown voltage of the diac, whereupon the latter ignites and emits a short current pulse into the gate circuit of transistor 8. This also charges the gate capacitance of transistor 8.
  • the start-up circuit 18 is shut down, which can be accomplished, for example, by a circuit which prevents a voltage build-up on the capacitor of the RC element, as a result of which the diac does not do the necessary Receives ignition voltage.
  • Zener diodes 6 and 9 and the resistors 5 and 10 serve to ensure that the permissible gate-source voltage of the power MOSFET 4 and 8 cannot be exceeded.
  • the internal gate capacitances of transistors 4 and 8 are respectively charged and discharged directly from transformer windings n 3 and n 2 via resistors 5 and 10.
  • the resonant circuit current consists of the lamp current and the current through the capacitor 13, which also flows via the heating coil 14 or 15. If the discharge path is defective, the conditions are the same as before the ignition, but no ignition can take place. Because of the 5 to 10 times higher currents than the. In operation, the transistors 4 and 8 and the current limiting choke 12 quickly become hot. In order to avoid destruction of these components, the fuse 11, for example a fuse, is provided in the lamp line. If the discharge path is defective, the resonant circuit current rises, the fuse melts within a short time, and the current path of the resonant circuit is thus interrupted without the components being destroyed.
  • the transistor 8 contains only start-up pulses without an oscillating circuit current flowing.
  • the resonant circuit quality Q is increased by reducing the resonant circuit capacitance, which leads to an increase in the resonance frequency of the unloaded resonant circuit. If the frequency change of the alternating voltage between the frequency in the ignition torque and the frequency in the nominal operation is chosen to be correspondingly large, the current through the resonant circuit or through the transistors in the ignition torque can be deliberately limited.
  • the change in frequency of the AC voltage by controlling the transistor half-bridge circuit can be implemented, for example, by an analog or digital control logic.
  • the frequency change can also be in a freely oscillating arrangement, e.g. with the help of a saturation current transformer, which leads to a particularly simple control of the ballast.
  • the subject of the invention reduces the current stress on the components during the ignition phase, without the transistors having to work to limit the current in the active characteristic area. This leads, for example, to a considerable reduction in the size of the resonant circuit choke and allows the use of transistors with a lower pulse load capacity. Furthermore, there is an increase in efficiency in that, when the lamp is in nominal operation, a smaller current flows through the heating coils due to the reduction in the resonant circuit capacity. With the invention it is thus possible to reduce the component costs while at the same time increasing the reliability of an electronic ballast for gas discharge lamps.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
EP83112933A 1983-01-14 1983-12-21 Verfahren zum Betreiben einer Gasentladungslampe Withdrawn EP0114370A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3301108 1983-01-14
DE19833301108 DE3301108A1 (de) 1983-01-14 1983-01-14 Verfahren zum betreiben einer gasentladungslampe

Publications (1)

Publication Number Publication Date
EP0114370A1 true EP0114370A1 (de) 1984-08-01

Family

ID=6188313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112933A Withdrawn EP0114370A1 (de) 1983-01-14 1983-12-21 Verfahren zum Betreiben einer Gasentladungslampe

Country Status (7)

Country Link
EP (1) EP0114370A1 (es)
JP (1) JPS59173995A (es)
AU (1) AU2324484A (es)
DE (1) DE3301108A1 (es)
DK (1) DK15284A (es)
ES (1) ES528867A0 (es)
FI (1) FI840122A (es)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0241279A1 (en) * 1986-04-08 1987-10-14 Actronic Lighting Cc Controller for gas discharge lamps
EP0361748A1 (en) * 1988-09-26 1990-04-04 General Electric Company Power control circuit for discharge lamp and method of operating same
GB2226463A (en) * 1988-12-21 1990-06-27 Sirous Yazdanian Control of fluorescent lights
EP0415490A2 (de) * 1989-08-31 1991-03-06 Philips Patentverwaltung GmbH Schaltungsanordnung zum Speisen einer Last
WO1996007297A2 (en) * 1994-08-22 1996-03-07 Philips Electronics N.V. Circuit arrangement for a discharge lamp comprising a dc-ac converter and a resonance circuit
WO1996010898A2 (en) * 1994-09-30 1996-04-11 Pacific Scientific Company Improvements in ballast circuit for fluorescent lamps
US5798617A (en) 1996-12-18 1998-08-25 Pacific Scientific Company Magnetic feedback ballast circuit for fluorescent lamp
US5866993A (en) 1996-11-14 1999-02-02 Pacific Scientific Company Three-way dimming ballast circuit with passive power factor correction
US5925986A (en) 1996-05-09 1999-07-20 Pacific Scientific Company Method and apparatus for controlling power delivered to a fluorescent lamp
US5955841A (en) 1994-09-30 1999-09-21 Pacific Scientific Company Ballast circuit for fluorescent lamp
US6037722A (en) 1994-09-30 2000-03-14 Pacific Scientific Dimmable ballast apparatus and method for controlling power delivered to a fluorescent lamp
WO2005072023A1 (en) 2004-01-23 2005-08-04 Koninklijke Philips Electronics N.V. High frequency driver for gas discharge lamp
WO2006056143A1 (en) * 2004-11-29 2006-06-01 Century Concept Ltd. Electronic ballast with preheating and dimming control

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62126598A (ja) * 1985-11-27 1987-06-08 松下電器産業株式会社 蛍光ランプ点灯装置
GB8711131D0 (en) * 1987-05-12 1987-06-17 Emi Plc Thorn Power supply
EP0359860A1 (de) * 1988-09-23 1990-03-28 Siemens Aktiengesellschaft Verfahren und Vorrichtung zum Betreiben mindestens einer Gasentladungslampe
US6111369A (en) * 1998-12-18 2000-08-29 Clalight Israel Ltd. Electronic ballast
DE102008064447B3 (de) 2008-12-22 2010-08-12 Kunert Fashion Gmbh & Co. Kg Beinbekleidungsstück aus Maschenware und Verfahren zu dessen Herstellung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3412287A (en) * 1964-09-23 1968-11-19 Philips Corp Electrical arrangement
DE3031322A1 (de) * 1980-08-20 1982-04-01 Licentia Gmbh Schaltungsanordnung fuer niederspannungs-leuchtstofflampen
US4346332A (en) * 1980-08-14 1982-08-24 General Electric Company Frequency shift inverter for variable power control
EP0062275A1 (de) * 1981-03-30 1982-10-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Vorschaltanordnung zum Betreiben von Niederdruckentladungslampen
EP0065794A1 (en) * 1981-05-14 1982-12-01 Koninklijke Philips Electronics N.V. Electric arrangement for starting and supplying a gas and/or vapour discharge lamp comprising two preheatable electrodes
FR2520575A1 (fr) * 1982-01-26 1983-07-29 Thomson Brandt Gmbh Circuit d'alimentation d'un tube luminescent
EP0092654A2 (de) * 1981-04-14 1983-11-02 Siemens Aktiengesellschaft Vorschaltgerät

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3412287A (en) * 1964-09-23 1968-11-19 Philips Corp Electrical arrangement
US4346332A (en) * 1980-08-14 1982-08-24 General Electric Company Frequency shift inverter for variable power control
DE3031322A1 (de) * 1980-08-20 1982-04-01 Licentia Gmbh Schaltungsanordnung fuer niederspannungs-leuchtstofflampen
EP0062275A1 (de) * 1981-03-30 1982-10-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Vorschaltanordnung zum Betreiben von Niederdruckentladungslampen
EP0092654A2 (de) * 1981-04-14 1983-11-02 Siemens Aktiengesellschaft Vorschaltgerät
EP0065794A1 (en) * 1981-05-14 1982-12-01 Koninklijke Philips Electronics N.V. Electric arrangement for starting and supplying a gas and/or vapour discharge lamp comprising two preheatable electrodes
FR2520575A1 (fr) * 1982-01-26 1983-07-29 Thomson Brandt Gmbh Circuit d'alimentation d'un tube luminescent

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ELEKTRONIK, Band 32, Nr. 20, Oktober 1983, Seiten 107-108, München, DE *

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0241279A1 (en) * 1986-04-08 1987-10-14 Actronic Lighting Cc Controller for gas discharge lamps
EP0361748A1 (en) * 1988-09-26 1990-04-04 General Electric Company Power control circuit for discharge lamp and method of operating same
GB2226463A (en) * 1988-12-21 1990-06-27 Sirous Yazdanian Control of fluorescent lights
EP0415490A2 (de) * 1989-08-31 1991-03-06 Philips Patentverwaltung GmbH Schaltungsanordnung zum Speisen einer Last
EP0415490A3 (en) * 1989-08-31 1991-04-03 Philips Patentverwaltung Gmbh Circuit arrangement for power supply to a load
CN1075336C (zh) * 1994-08-22 2001-11-21 皇家菲利浦电子有限公司 电路设备
WO1996007297A2 (en) * 1994-08-22 1996-03-07 Philips Electronics N.V. Circuit arrangement for a discharge lamp comprising a dc-ac converter and a resonance circuit
WO1996007297A3 (en) * 1994-08-22 1996-05-30 Philips Electronics Nv Circuit arrangement for a discharge lamp comprising a dc-ac converter and a resonance circuit
US5955841A (en) 1994-09-30 1999-09-21 Pacific Scientific Company Ballast circuit for fluorescent lamp
WO1996010898A2 (en) * 1994-09-30 1996-04-11 Pacific Scientific Company Improvements in ballast circuit for fluorescent lamps
US5982111A (en) 1994-09-30 1999-11-09 Pacific Scientific Company Fluorescent lamp ballast having a resonant output stage using a split resonating inductor
US6037722A (en) 1994-09-30 2000-03-14 Pacific Scientific Dimmable ballast apparatus and method for controlling power delivered to a fluorescent lamp
WO1996010898A3 (en) * 1994-09-30 1996-07-18 Pacific Scientific Co Improvements in ballast circuit for fluorescent lamps
US5925986A (en) 1996-05-09 1999-07-20 Pacific Scientific Company Method and apparatus for controlling power delivered to a fluorescent lamp
US5866993A (en) 1996-11-14 1999-02-02 Pacific Scientific Company Three-way dimming ballast circuit with passive power factor correction
US5798617A (en) 1996-12-18 1998-08-25 Pacific Scientific Company Magnetic feedback ballast circuit for fluorescent lamp
WO2005072023A1 (en) 2004-01-23 2005-08-04 Koninklijke Philips Electronics N.V. High frequency driver for gas discharge lamp
US7746002B2 (en) 2004-01-23 2010-06-29 Koninklijke Philips Electronics N.V. High frequency driver for gas discharge lamp
WO2006056143A1 (en) * 2004-11-29 2006-06-01 Century Concept Ltd. Electronic ballast with preheating and dimming control
US7728528B2 (en) 2004-11-29 2010-06-01 Century Concept Ltd Electronic ballast with preheating and dimming control

Also Published As

Publication number Publication date
JPS59173995A (ja) 1984-10-02
DK15284A (da) 1984-07-15
DE3301108A1 (de) 1984-07-19
ES8407286A1 (es) 1984-08-16
FI840122A (fi) 1984-07-15
AU2324484A (en) 1984-07-19
ES528867A0 (es) 1984-08-16
DK15284D0 (da) 1984-01-13
FI840122A0 (fi) 1984-01-13

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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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Effective date: 19840904

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Effective date: 19860701

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SOEYLEMEZ, ALI-IHSAN