EP0748146B1 - Schaltungsanordnung zur Wendelvorheizung von Leuchtstofflampen - Google Patents

Schaltungsanordnung zur Wendelvorheizung von Leuchtstofflampen Download PDF

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Publication number
EP0748146B1
EP0748146B1 EP96108864A EP96108864A EP0748146B1 EP 0748146 B1 EP0748146 B1 EP 0748146B1 EP 96108864 A EP96108864 A EP 96108864A EP 96108864 A EP96108864 A EP 96108864A EP 0748146 B1 EP0748146 B1 EP 0748146B1
Authority
EP
European Patent Office
Prior art keywords
fluorescent lamp
circuit arrangement
lamp
transformer
filaments
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 - Lifetime
Application number
EP96108864A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0748146A1 (de
Inventor
Peter Krummel
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 EP0748146A1 publication Critical patent/EP0748146A1/de
Application granted granted Critical
Publication of EP0748146B1 publication Critical patent/EP0748146B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • Y10S315/05—Starting and operating circuit for fluorescent lamp

Definitions

  • the invention relates to a circuit arrangement for Preheat the filaments of at least one fluorescent lamp according to the preamble of claim 1.
  • Circuit arrangements of the type mentioned are for example known from DE-C2-31 52 951, DE-A-4,013,697 and EP-A-0,602,719.
  • EP-A-0,707,438 is also relevant within the meaning of Art.
  • circuitry In terms of circuitry, there are many options in electronic Ballasts certain functions with appropriate Implement circuitry. For economic But reasons are circuit-intensive embodiments only enforceable on the market.
  • ballasts In the currently most economical circuit design known electronic ballasts is a Load circuit that normally uses a series resonant circuit with lamp choke and ignition capacitor.
  • the load circuit is the electrodes or filaments of the fluorescent lamp - if you are here for the sake of simplicity obtains a 1-lamp ballast - connected in series.
  • An inverter with a half-bridge arrangement drives this load circuit consisting of two semiconductor switches connected in series, whose common connection point is the exit of the Half-bridge arrangement forms.
  • the inverter generates one Half-bridge voltage in the form of a high-frequency rectangular pulse train and passes it on to the load circuit.
  • the switches of the half-bridge arrangement are mostly bipolar Power transistors formed, the inverter is designed so that the two switches alternatively activated with a short switching pause.
  • This inverter drives the load circuit on ignition and in Normal operation and the frequency can be influenced. Frequency changes the half-bridge voltage are to adapt to the certain lamp functions in different operating states, such as preheating, ignition or normal operation.
  • a major disadvantage of this solution discussed here is in that the current in the resonant circuit is directly connected to the voltage applied to the lamp, d. H. while the preheating phase is then the specified preheating current. Around a relatively high preheating current, the prerequisite for a rapid heating of the electrodes of the fluorescent lamp is to obtain is therefore a correspondingly high lamp voltage required. The lamp voltage in turn must be limited to premature during this preheating phase Exclude attempts to ignite the fluorescent lamp. With the described Circuit can therefore only be preheated in of the order of about 1.5 to 2 s.
  • the single lamp load circuit consists of the known circuit in each case a fluorescent lamp, an ignition capacitor and one Stray field transformer.
  • the ignition capacitor is over first connections of the filaments of the fluorescent lamp in parallel switched.
  • a primary winding of the stray field transformer is via a coupling capacitor to which the half-bridge voltage leading output of the inverter and on the other hand connected to ground reference potential.
  • a secondary winding of the Stray field transformer is, with second connections of the filaments connected to the fluorescent lamp, also parallel to this arranged.
  • the leakage inductances of the stray field transformer form together with the capacitance of the ignition capacitor a series resonance circuit of the lamp load circuit, which is close to the high-frequency switching frequency of the inverter is coordinated.
  • each of these lamp load circuits has one such series resonant circuit, the secondary windings the stray field transformers are connected in series so that a direct current path is formed in which the electrodes of the Fluorescent lamps and the secondary windings with each other Series lie.
  • this is DC path via one to be closed during the preheating time Switch and a preheating resistor to the supply voltage of the inverter, usually as an intermediate circuit voltage designated, connected.
  • the switch a timer is assigned, which when the electronic ballast due to the build-up of intermediate circuit voltage is triggered and the switch for the keeps the specified duration of the preheating time closed.
  • the invention is therefore based on the object for Circuit arrangement of the type mentioned another Specify solution with which it is simple and in one inexpensive circuit design is possible, the requirements for a safe and especially fast preheating to create the filaments of the fluorescent lamp.
  • FIG. 1 In the drawing is schematically an AC mains voltage un connected harmonic filter 1 shown that serves as a radio protection filter for repercussions on the supply network limited by high-frequency interference voltages, the due to switching operations in the electronic ballast arise.
  • a rectifier arrangement 2 At the output of this harmonic filter 1 a rectifier arrangement 2 is connected, on the one hand the AC line voltage un into a rectified voltage transformed, on the other hand also a sine correction circuit may contain.
  • the rectifier arrangement 2 thus becomes a corrected ground reference potential referenced DC voltage, the one as an electrolytic capacitor trained support capacitor CE supplied with a further connection on the other hand to ground reference potential lies. In this way, a stabilized, unaffected by AC line voltage modulations DC link voltage UZW for continuous Supply of an inverter 3 generated.
  • inverter 3 is indicated that it is generally a half-bridge arrangement from two often bipolar power transistors encompasses that over their in series Switching distances between the intermediate circuit voltage UZW and Ground reference potential are arranged and controlled so that they are alternatively turned on. At the common Connection point of the switching distances of these two The power transistors of the half-bridge arrangement become one generates high-frequency pulse train, which the output signal of Inverter 3 forms and generally as a half-bridge voltage UHB is called.
  • This half-bridge voltage UHB forms the voltage supply for a lamp load circuit connected to the inverter 3.
  • This is here as a series resonance circuit that is between the output of the inverter 3 and ground reference potential is arranged and a lamp choke LDR, a fluorescent lamp FL and a half-bridge capacitor CHB comprises.
  • Ignition capacitor CZ provided to the filaments E1, E2 of the Fluorescent lamp LL is connected.
  • the inverter 3 controls in cooperation with the connected one Lamp load circuit all operating functions of the Fluorescent lamp in the lamp load circuit. After commissioning the electronic ballast by applying the AC mains voltage un becomes the series resonance circuit of the lamp load circuit for gentle switching on of the fluorescent lamp FL operated during a preheating time at a frequency that is above the resonance frequency. It is said to be a high one Current through the electrodes E1, E2 of the fluorescent lamp FL flow to the emission temperature as quickly as possible to heat up. At the same time, however, the fluorescent lamp FL applied voltage should not be too high to be a to prevent premature ignition. As soon as the electrodes E1, E2 of the fluorescent lamp FL at the end of the preheating time at the emission temperature are brought, the fluorescent lamp FL ignite as immediately as possible.
  • the preheating of the coils E1, E2 Fluorescent lamp FL of interest is in the present.
  • the voltage on the fluorescent lamp FL during this Preheating time does not exceed a defined value in order to early ignition if the heater is not sufficiently heated Exclude spirals. Therefore, the inverter 3 controlled so that it a during the specified preheating Supplies half-bridge voltage UHB with a pulse frequency, which over the resonance frequency of the series resonance circuit in Lamp load circuit is. At this high frequency it works Lamp choke LDR current limiting. With that - through Circuit arrangement in the lamp load circuit requires an upper limit for those that can be fed to the filaments E1, E2 of the fluorescent lamp FL Given heating power, so the preheating time accordingly must be long.
  • the in the Drawing shown embodiment of the already described circuit parts that are assumed to be known per se going beyond the lamp load circuit one during the Preheat time can be activated via the half-bridge voltage UHB assigned internal voltage source assigned.
  • This includes a transformer TR with a primary winding PR, which over a coupling capacitor CK directly to the output of the Inverter 3 is connected.
  • the one from the coupling capacitor CK connection of the primary winding PR is over the switching path of a semiconductor switch HS, for example is designed as a field effect transistor Ground reference potential.
  • a timer 4 is over an adaptation network to the control input of this semiconductor switch HS connected. Parallel to the series connection of coupling capacitor CK and primary winding PR of the transformer TR, a free-wheeling diode FD is connected.
  • the secondary side of the transformer TR is through two in their windings synchronized secondary windings S1, S2 educated.
  • the winding sense of the primary and secondary windings PR or S1, S2 of the transformer TR is in the drawing symbolically clarified.
  • Each of the secondary windings S1 or S2 of the transformer TR is direct with one connection to one of the two electrodes E1 or E2 of the fluorescent lamp FL connected while in the line branch between the other winding end and the second, with the ignition capacitor CZ connected connection of the corresponding helix E1 or E2 a rectifier diode DW1 or DW2 is provided.
  • a switch-on process for the fluorescent lamp FL is normally by applying the mains voltage un triggered on the electronic ballast. there the DC link voltage builds up on the support capacitor CE UZW on and inverter 3 is switched on.
  • the frequency the half-bridge voltage UHB is for the duration of the given Preheating time well above the resonance frequency of the Series resonant circuit in the lamp load circuit, so that at the Fluorescent lamp FL applied voltage much lower than the ignition voltage is.
  • the inverter 3 runs to change lamps automatically without switching off the mains voltage back on and tries to replace the fluorescent lamp ignite. If you route the trigger signal for the timer 4 from a known start / stop circuit for the Inverter 3 or from the corresponding changes in Lamp load circuit at the beginning of the connection process, so this operating function is also clearly taken into account.
  • preheating time less than 0.5 s.
  • the transformer TR is therefore no longer excited on the primary side and heating the filaments E1, E2 of the fluorescent lamp FL has ended.
  • the freewheeling diode FD may residual energy still present in the TR transformer quickly reduced.
  • the inverter 3 becomes the frequency of the half-bridge voltage after the end of the preheating time UHB lowered.
  • the voltage on the fluorescent lamp FL thus increases as long until the ignition voltage is reached and the lamp ignites.
  • the lamp choke limits LDR because of their very much at this operating frequency high reactance due to the fluorescent lamp FL flowing current.
  • rectifier diodes DW1 and DW2 are, because appear for the heating function described they are not absolutely necessary. These rectifier diodes serve to relieve high voltages on the sockets To limit fluorescent lamp FL, on the one hand they prevent it an undesirable swinging of the lamp circuit. On the other hand they serve the operational safety when changing the lamp undervoltage.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
EP96108864A 1995-06-08 1996-06-03 Schaltungsanordnung zur Wendelvorheizung von Leuchtstofflampen Expired - Lifetime EP0748146B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19520999 1995-06-08
DE19520999A DE19520999A1 (de) 1995-06-08 1995-06-08 Schaltungsanordnung zur Wendelvorheizung von Leuchtstofflampen

Publications (2)

Publication Number Publication Date
EP0748146A1 EP0748146A1 (de) 1996-12-11
EP0748146B1 true EP0748146B1 (de) 2001-08-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96108864A Expired - Lifetime EP0748146B1 (de) 1995-06-08 1996-06-03 Schaltungsanordnung zur Wendelvorheizung von Leuchtstofflampen

Country Status (9)

Country Link
US (1) US5854538A (xx)
EP (1) EP0748146B1 (xx)
KR (1) KR100448290B1 (xx)
AT (1) ATE205042T1 (xx)
CA (1) CA2178443C (xx)
DE (2) DE19520999A1 (xx)
HK (1) HK1005304A1 (xx)
SG (1) SG64387A1 (xx)
TW (1) TW415158B (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7728528B2 (en) 2004-11-29 2010-06-01 Century Concept Ltd Electronic ballast with preheating and dimming control
US8228000B2 (en) 2009-05-12 2012-07-24 Osram Ag Circuit arrangement for operating a low-pressure gas discharge lamp and corresponding method

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US5656891A (en) * 1994-10-13 1997-08-12 Tridonic Bauelemente Gmbh Gas discharge lamp ballast with heating control circuit and method of operating same
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ATE245337T1 (de) 1999-05-25 2003-08-15 Tridonicatco Gmbh & Co Kg Elektronisches vorschaltgerät für mindestens eine niederdruck-entladungslampe
DE19923945A1 (de) 1999-05-25 2000-12-28 Tridonic Bauelemente Elektronisches Vorschaltgerät für mindestens eine Niederdruck-Entladungslampe
US6366032B1 (en) 2000-01-28 2002-04-02 Robertson Worldwide, Inc. Fluorescent lamp ballast with integrated circuit
EP1134769A1 (en) 2000-03-08 2001-09-19 Cooper Bussmann UK Limited A method of applying M-effect material
US6534926B1 (en) 2000-04-12 2003-03-18 Tmc Enterprises, A Division Of Tasco Industries, Inc. Portable fluorescent drop-light
DE10036950A1 (de) * 2000-07-28 2002-02-07 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Betriebsgerät für Entladungslampen mit Schalterentlastung beim Vorheizen der Elektrodenwendeln
GB0026111D0 (en) * 2000-10-25 2000-12-13 Raytheon Marine Ltd Fluorescent lamp driver circuit
GB2380872B (en) * 2000-10-25 2004-03-10 Raymarine Ltd Fluorescent lamp driver circuit
DE10102837A1 (de) 2001-01-22 2002-07-25 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Betriebsgerät für Gasentladungslampen mit Abschaltung der Wendelheizung
DE10127135B4 (de) * 2001-06-02 2006-07-06 Insta Elektro Gmbh Dimmbares elektronisches Vorschaltgerät
US6501225B1 (en) * 2001-08-06 2002-12-31 Osram Sylvania Inc. Ballast with efficient filament preheating and lamp fault protection
DE10145766A1 (de) 2001-09-17 2003-04-03 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Vorrichtung und Verfahren zum Vorheizen der Wendelelektroden einer Leuchtstofflampe
WO2003030593A1 (en) * 2001-09-29 2003-04-10 Ye, Min Fluorescent lamp capable of starting with at least one broken filament
DE20303594U1 (de) * 2002-12-23 2004-05-06 Steca Batterieladesysteme und Präzisionselektronik GmbH Vorheizschaltung, insbesondere für eine Entladungslampe
DE10304544B4 (de) * 2003-02-04 2006-10-12 Hep Tech Co.Ltd. Elektronisches Vorschaltgerät
EP1652412A1 (en) * 2003-07-25 2006-05-03 Koninklijke Philips Electronics N.V. Filament cutout circuit
NO322474B1 (no) * 2003-10-21 2006-10-09 Fontenoy Philippe Lysrorarmatur samt fremgangsmate for drift av lysror i slik armatur
DE102004025774A1 (de) * 2004-05-26 2005-12-22 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Vorschaltgerät für Entladungslampe mit Dauerbetriebs-Regelschaltung
DE102005057107B4 (de) * 2004-11-25 2013-11-14 Kk Elektrotechnik Gmbh Vorschaltgerät
US7187132B2 (en) * 2004-12-27 2007-03-06 Osram Sylvania, Inc. Ballast with filament heating control circuit
DE102005013564A1 (de) * 2005-03-23 2006-09-28 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Schaltungsanordnung und Verfahren zum Betreiben mindestens einer Lampe
DE102005030115A1 (de) * 2005-06-28 2007-01-18 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Schaltungsanordnung und Verfahren zum Betrieb mindestens einer LED und mindestens einer elektrischen Lampe
DE102005052525A1 (de) * 2005-11-03 2007-05-10 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Ansteuerschaltung für einen schaltbaren Heiztransformator eines elektronischen Vorschaltgeräts und entsprechendes Verfahren
US7728525B2 (en) * 2007-07-27 2010-06-01 Osram Sylvania Inc. Relamping circuit for battery powered ballast
US7626344B2 (en) * 2007-08-03 2009-12-01 Osram Sylvania Inc. Programmed ballast with resonant inverter and method for discharge lamps
US7446488B1 (en) 2007-08-29 2008-11-04 Osram Sylvania Metal halide lamp ballast controlled by remote enable switched bias supply
US20090256481A1 (en) * 2008-04-11 2009-10-15 Osram Sylvania Inc. Stand alone lamp filament preheat circuit for ballast
US7880391B2 (en) * 2008-06-30 2011-02-01 Osram Sylvania, Inc. False failure prevention circuit in emergency ballast
US8232727B1 (en) 2009-03-05 2012-07-31 Universal Lighting Technologies, Inc. Ballast circuit for a gas-discharge lamp having a filament drive circuit with monostable control
US20100327759A1 (en) * 2009-06-24 2010-12-30 Koninklijke Philips Electronics N.V. Electronic ballast for a fluorescent lamp
TWI401998B (zh) * 2009-07-28 2013-07-11 Inergy Technology Inc 螢光燈預熱控制裝置及其方法
DE102009053617A1 (de) * 2009-11-17 2011-05-19 Osram Gesellschaft mit beschränkter Haftung Elektronisches Vorschaltgerät und Verfahren zum Betreiben mindestens einer Entladungslampe
TWI446835B (zh) * 2011-09-26 2014-07-21 Delta Electronics Inc 諧振電容調整元件及其所適用之電流預熱型電子安定器
US9225253B2 (en) * 2012-10-23 2015-12-29 Microchip Technology Inc. High voltage switching linear amplifier and method therefor
US10686363B2 (en) * 2013-08-09 2020-06-16 Osram Sylvania Inc. Primary side no load detection and shutdown circuit in an isolated driver

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7728528B2 (en) 2004-11-29 2010-06-01 Century Concept Ltd Electronic ballast with preheating and dimming control
US8228000B2 (en) 2009-05-12 2012-07-24 Osram Ag Circuit arrangement for operating a low-pressure gas discharge lamp and corresponding method

Also Published As

Publication number Publication date
TW415158B (en) 2000-12-11
DE59607566D1 (de) 2001-10-04
KR970004974A (ko) 1997-01-29
DE19520999A1 (de) 1996-12-12
ATE205042T1 (de) 2001-09-15
KR100448290B1 (ko) 2004-11-26
US5854538A (en) 1998-12-29
SG64387A1 (en) 1999-04-27
HK1005304A1 (en) 1998-12-31
CA2178443A1 (en) 1996-12-09
EP0748146A1 (de) 1996-12-11
CA2178443C (en) 2005-04-05

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