EP0679046A1 - Circuit pour alimenter des lampes à décharge basse-pression - Google Patents

Circuit pour alimenter des lampes à décharge basse-pression Download PDF

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Publication number
EP0679046A1
EP0679046A1 EP95103597A EP95103597A EP0679046A1 EP 0679046 A1 EP0679046 A1 EP 0679046A1 EP 95103597 A EP95103597 A EP 95103597A EP 95103597 A EP95103597 A EP 95103597A EP 0679046 A1 EP0679046 A1 EP 0679046A1
Authority
EP
European Patent Office
Prior art keywords
capacitor
circuit
diodes
inverter
circuit arrangement
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
Application number
EP95103597A
Other languages
German (de)
English (en)
Other versions
EP0679046B1 (fr
Inventor
Eugen Statnic
Gunther Dr. Löhmann
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 EP0679046A1 publication Critical patent/EP0679046A1/fr
Application granted granted Critical
Publication of EP0679046B1 publication Critical patent/EP0679046B1/fr
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
    • 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
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/355—Power factor correction [PFC]; Reactive power compensation
    • 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 operating low-pressure discharge lamps according to the preamble of claim 1.
  • the high-frequency operation of low-pressure discharge lamps compared to lamp operation at the mains frequency enables a significant reduction in the operating device dimensions and improved operating conditions for the lamps, e.g. B. better ignition behavior, no flickering and higher luminous efficacy, but on the other hand requires a higher amount of circuitry to ensure sufficient radio interference suppression and a sinusoidal mains current draw with a power factor close to one.
  • a circuit arrangement corresponding to the preamble of claim 1 is disclosed, for example, in European Patent EP 0 372 303. It contains a half-bridge inverter with two alternating switching transistors, to the center tap of which a series resonance circuit, consisting of resonance inductance, coupling capacitor and resonance capacitance, is connected. A low-pressure discharge lamp is also integrated in the series resonant circuit.
  • this circuit has an active harmonic filter, which ensures a sinusoidal mains current draw that meets the IEC regulations.
  • This harmonic filter is formed by four diodes which are connected to one another like a bridge rectifier and are integrated into the circuit in the forward DC direction between the DC voltage output of the mains voltage rectifier and the positive pole of the smoothing capacitor feeding the inverter.
  • the four diodes of the harmonic filter interrupt the charge transport to the smoothing capacitor in the switching cycle of the inverter.
  • the diodes are controlled via the center tap between the diodes connected in series.
  • the center tap of a first pair of diodes is here on the one hand via a pump capacitor directly to the center tap of the half-bridge inverter and on the other hand via another pump capacitor between the resonance inductance and the coupling capacitor led to a tap in the series resonance circuit, while the center tap of the second pair of diodes is connected to a tap in the series resonance circuit via a DC isolating capacitor and an inductor.
  • the circuit arrangement according to the invention contains an inverter with a downstream LC output circuit, in which a low-pressure discharge lamp is integrated.
  • the inverter is supplied with DC voltage via a high-frequency filter, a line voltage rectifier and a smoothing capacitor located parallel to the DC voltage output of the line voltage rectifier.
  • a high-frequency bridge rectifier consisting of two series circuits of two diodes each, is integrated in the circuit in the forward DC direction.
  • the circuit arrangement according to the invention has a storage choke which is inserted into the circuit between the positive pole of the DC voltage output of the mains voltage rectifier and the input of the high-frequency bridge rectifier.
  • the center tap between the first two diodes connected in series is connected to a first lamp electrode via a negative feedback capacitance, while the center tap between the two second diodes connected in series is connected to the second lamp electrode and to the negative pole of the smoothing capacitor via a backup capacitor.
  • This inventive connection of the storage choke and the high-frequency bridge rectifier makes a sinusoidal shape that meets the IEC regulations Grid current draw and a grid power factor greater than 0.98 reached.
  • the storage choke at the input of the high-frequency bridge rectifier also exerts a step-up effect, so that the circuit arrangement according to the invention is particularly suitable for operating low-pressure discharge lamps with a comparatively high operating voltage, for. B., for the operation of miniature fluorescent lamps and fluorescent lamps with a sharp increase in the operating voltage during the aging process, is suitable.
  • the circuit arrangement according to the invention also has a capacitor which is connected in parallel with the DC voltage output of the mains voltage rectifier and which, together with the storage inductor, forms a low-pass filter.
  • This low-pass filter enables a further weakening of the high-frequency voltage components on the network connection side of the circuit arrangement.
  • the lamp electrodes designed as preheatable filaments are advantageously integrated into the LC output circuit of the inverter in such a way that, after the low-pressure discharge lamp has been ignited, a heating current does not flow through it, which would also burden the electrode filaments in addition to the current over the discharge path .
  • the circuit arrangement according to the invention is also suitable for operating miniature fluorescent lamps, the electrodes of which are exposed to a particularly high thermal load during operation, since these lamps have a significantly higher power density than T8 or T10 fluorescent lamps.
  • FIG. 2 shows a detailed circuit diagram of a particularly preferred embodiment of the circuit arrangement according to the invention.
  • the main component of this circuit is a self-oscillating, current-feedback half-bridge inverter with two alternating switching transistors T1, T2, which receives its supply voltage from the smoothing capacitor C2 connected in parallel with its input.
  • the smoothing capacitor C2 is fed via a radio interference filter FI and a rectifier GL with an output capacitor C1 connected in parallel with its DC voltage output and the high-frequency rectifier bridge D1, D2, D3, D4.
  • An LC output circuit in particular a series resonance circuit, consisting of a resonance inductance LR, a coupling capacitor CK and a resonance capacitance CR, is connected to the center tap of the switching transistors T1, T2.
  • the primary winding RKA of a toroidal transformer is integrated in the series resonant circuit.
  • a T2 miniature fluorescent lamp L with a power consumption of 13 watts is connected in parallel with the resonance capacity CR.
  • the synonym "T2" means that the fluorescent lamp L has a diameter (perpendicular to the discharge path) of approximately 2/8 inches (approximately 7 mm).
  • the lamp electrodes E1, E2, which are designed as filaments, are each connected to one another by their second connection via a Sidac SI and a PTC thermistor R. Together with these components, they form a heating circuit lying parallel to the resonance capacitance CR, which enables the electrode filaments E1, E2 to be preheated before the lamp is ignited.
  • the Sidac SI interrupts the heating circuit, so that the PTC thermistor R is switched out of the LC output circuit of the inverter.
  • the discharge path of the fluorescent lamp L is connected in parallel to the resonance capacitance CR and in parallel to the series connection of Sidac SI and PTC thermistor R.
  • the series resonance circuit of the half-bridge inverter T1, T2, consisting of the components RKA, LR, CK and CR, is closed via a backup capacitor CS, the one terminal is connected to the resonance capacitance CR and the first terminal of the lamp electrode E2, and the other terminal of which is connected to the negative pole of the smoothing capacitor C2 and to the negative output of the mains voltage rectifier GL.
  • the electrode filaments E1, E2 of the lamp L are therefore not integrated in the series resonant circuit and are therefore only flowed through by the discharge current after the lamp has ignited.
  • the primary winding RKA of the toroidal core transformer controls the switching behavior of the transistors T1, T2 via the secondary winding RKB or RKC integrated in the respective base circuit of the transistors T1, T2 and the base series resistors R1, R4.
  • the transistor half-bridge also includes the emitter resistors R3, R6, the resistors R2, R5 connected in parallel with the base-emitter path and the only schematically illustrated start circuit ST, which triggers the oscillation of the inverter.
  • a detailed description of the mode of operation of the half-bridge inverter, including the start circuit ST, can be found, for example, in the book "Switching Power Supplies" by W. Hirschmann / A. Hauenstein, ed. Siemens AG, 1990 edition, on page 63.
  • the resistors R2 and R5 merely improve the switching behavior of the transistors T1, T2 in that they enable the charge carriers to be removed more quickly from the space charge zone of the base-emitter boundary layer.
  • Another main component of the circuit arrangement according to the invention is the high-frequency rectifier bridge, consisting of the diodes D1, D2, D3, D4, which is integrated in the circuit in the forward DC direction between the positive output of the mains voltage rectifier GL and the positive pole of the smoothing capacitor C2.
  • the diodes D1 and D2, like the diodes D3 and D4, are connected in series with one another.
  • the diode pair D1, D2 is arranged parallel to the diode pair D3, D4.
  • the anode connections of the diodes D1, D3 are connected via a storage choke L1 to the positive output of the mains voltage rectifier GL.
  • the cathode connections of the diodes D2, D4 are connected to the positive pole of the smoothing capacitor C2 and to the collector of the transistor T1.
  • the center tap between the diodes D1, D2 is connected to a connection of the coupling capacitor CK and the resonance capacitance CR as well as to the first connection of the electrode coil E1 via a negative feedback capacitor CG.
  • the center tap between the diodes D3, D4 is connected on the one hand directly to the connection point of the resonance capacitance CR and the electrode coil E2 and on the other hand via the support capacitor CS to the negative pole of the smoothing capacitor C2 and to connected to the negative output of the mains voltage rectifier GL.
  • a diode D5 is connected in parallel with the support capacitor CS and clamps the negative components of the support capacitor voltage to the negative pole of the smoothing capacitor C2.
  • the high-frequency rectifier bridge interrupts the charging of the smoothing capacitor C2 in the switching rhythm of the half-bridge inverter.
  • the circuit arrangement according to the invention has a safety shutdown which switches off the inverter in the event of a defective lamp or in the event of an abnormal operating state.
  • An essential component of this safety shutdown is a thyristor TH, the control electrode of which is controlled by a diac DI.
  • the thyristor TH is connected on the one hand via an ohmic holding resistor R10 to the collector of the transistor T1 and on the other hand to the negative pole of the smoothing capacitor C2.
  • the control electrode of the thyristor TH is connected via the diac DI and an electrolytic capacitor C3 to the negative pole of the smoothing capacitor C2.
  • the base terminal of the transistor T1 is connected to the anode of the thyristor TH via a diode D6 and an ohmic resistor R7. Voltage dividing resistors R15, R16, R17 are connected in parallel with the smoothing capacitor C2. The center tap between the resistors R15 and R16 is connected to the positive pole of the electrolytic capacitor C3 via a diode D8. The center tap between the negative feedback capacitor CG, the electrode coil E1, the coupling capacitor CK and the resonance capacitance CR is connected to the negative pole of the smoothing capacitor C2 via the resistors R8, R9 and R11.
  • the center tap between the resistors R9 and R11 is connected via a diode D7 to the positive pole of the electrolytic capacitor C3.
  • An ohmic resistor R13 is also connected in parallel with the electrolytic capacitor C3.
  • the center tap between the control electrode of the thyristor TH and the diac DI is connected via an ohmic resistor R14 to the negative pole of the smoothing capacitor C2.
  • the voltage divider R15, R16, R17 detects the voltage drop across the smoothing capacitor C2. If this exceeds a predetermined critical value, the electrolytic capacitor C3 is charged via the diode D8 to the breakover voltage of the diac DI and the thyristor TH turns on, so that the base of the transistor T1 is connected to the negative pole of the smoothing capacitor C2. This will Transistor T1 withdraws the control signal and the half-bridge inverter is switched off.
  • the voltage divider R8, R9, R11 detects the ignition or operating voltage of the miniature fluorescent lamp L.
  • the electrolytic capacitor C3 is also switched to the breakover voltage of the diac via the diode D7 DI charged so that the thyristor TH turns on and the control signal is withdrawn from the transistor T1.
  • the resistor R13 and the electrolytic capacitor C3 define a time constant so that the thyristor TH is not activated during the ignition phase of the lamp L.
  • Table 1 A suitable dimensioning of the electrical components of the exemplary embodiment described in more detail above is given in Table 1.
  • Table 1 R1, R4 10 ⁇ R2, R5 82 ⁇ R3, R6 0.56 ⁇ R7 100 ⁇ R8, R9, R16, R17 500 k ⁇ R10 68 k ⁇ R11 82 k ⁇ R13 1 M ⁇ R14 1 k ⁇ R15 47 k ⁇ C1 47 nF C2 4.7 ⁇ F C3 2.2 ⁇ F CS 4.7 nF CK 68 nF CR 2.2 nF CG 1 nF L1 1.5 mH LR 4.5 mH
  • RKA RKB: RKC 7: 2: 2 turns D1 - D8 RGL34J T1, T2 BUD 620 TH C106M

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
EP95103597A 1994-03-25 1995-03-13 Circuit pour alimenter des lampes à décharge basse-pression Expired - Lifetime EP0679046B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4410492 1994-03-25
DE4410492A DE4410492A1 (de) 1994-03-25 1994-03-25 Schaltungsanordnung zum Betrieb von Niederdruckentladungslampen

Publications (2)

Publication Number Publication Date
EP0679046A1 true EP0679046A1 (fr) 1995-10-25
EP0679046B1 EP0679046B1 (fr) 1999-06-02

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Family Applications (1)

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EP95103597A Expired - Lifetime EP0679046B1 (fr) 1994-03-25 1995-03-13 Circuit pour alimenter des lampes à décharge basse-pression

Country Status (4)

Country Link
US (1) US5521467A (fr)
EP (1) EP0679046B1 (fr)
JP (1) JP3599823B2 (fr)
DE (2) DE4410492A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997019578A1 (fr) * 1995-11-21 1997-05-29 Philips Electronics N.V. Circuit
WO2010027392A1 (fr) * 2008-09-05 2010-03-11 Lutron Electronics Co., Inc. Ballast électronique possédant une topologie de circuit résonant asymétrique

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US5767631A (en) * 1996-12-20 1998-06-16 Motorola Inc. Power supply and electronic ballast with low-cost inverter bootstrap power source
DE19715341C1 (de) * 1997-04-12 1998-10-15 Vossloh Schwabe Gmbh Elektronisches Vorschaltgerät mit automatischem Wiederanlauf
US5939837A (en) * 1997-07-15 1999-08-17 Magnetek, Inc. Electronic ballast circuit for independently increasing the power factor and decreasing the crest factor
US5949199A (en) * 1997-07-23 1999-09-07 Virginia Tech Intellectual Properties Gas discharge lamp inverter with a wide input voltage range
US5998941A (en) * 1997-08-21 1999-12-07 Parra; Jorge M. Low-voltage high-efficiency fluorescent signage, particularly exit sign
US6034485A (en) * 1997-11-05 2000-03-07 Parra; Jorge M. Low-voltage non-thermionic ballast-free energy-efficient light-producing gas discharge system and method
US5982159A (en) * 1997-07-31 1999-11-09 Philips Electronics North America Corporation Dimmable, single stage fluorescent lamp
US5917717A (en) * 1997-07-31 1999-06-29 U.S. Philips Corporation Ballast dimmer with passive power feedback control
US6300722B1 (en) 1997-11-05 2001-10-09 Jorge M. Parra Non-thermionic ballast-free energy-efficient light-producing gas discharge system and method
CN1263687A (zh) * 1998-04-02 2000-08-16 皇家菲利浦电子有限公司 电路结构
JP2002500819A (ja) * 1998-04-02 2002-01-08 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 回路装置
DE19817508A1 (de) * 1998-04-20 1999-11-04 Vossloh Schwabe Gmbh Fehlersicheres Vorschaltgerät
US6014326A (en) * 1998-10-27 2000-01-11 Hewlett-Packard Company Half-bridge balancing circuit
US6144169A (en) * 1998-12-29 2000-11-07 Philips Electronics North America Corporation Triac dimmable electronic ballast with single stage feedback power factor inverter
US6051936A (en) * 1998-12-30 2000-04-18 Philips Electronics North America Corporation Electronic lamp ballast with power feedback through line inductor
DE19905487A1 (de) * 1999-02-11 2000-08-31 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Betrieb mindestens einer Niederdruckentladungslampe
EP1095542B1 (fr) * 1999-05-06 2003-07-30 Koninklijke Philips Electronics N.V. Circuit
US6465971B1 (en) 1999-06-02 2002-10-15 Jorge M. Parra Plastic “trofer” and fluorescent lighting system
US6411041B1 (en) 1999-06-02 2002-06-25 Jorge M. Parra Non-thermionic fluorescent lamps and lighting systems
KR100335990B1 (ko) * 1999-08-27 2002-05-10 윤덕용 형광등용 전자식 안정기의 역률 개선회로
EP1149513A1 (fr) * 1999-09-30 2001-10-31 Koninklijke Philips Electronics N.V. Circuit de mise en oeuvre de lampes a decharge a haute tension
JP2003510793A (ja) * 1999-09-30 2003-03-18 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 高圧ガス放電ランプに用いられる回路装置
KR100697726B1 (ko) * 2000-02-10 2007-03-21 페어차일드코리아반도체 주식회사 전자식 안정기를 구비한 램프 시스템
JP2003522396A (ja) * 2000-02-10 2003-07-22 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Ｎｔｃ抵抗を有する保護回路
US6348767B1 (en) * 2000-10-25 2002-02-19 General Electric Company Electronic ballast with continued conduction of line current
US7057375B2 (en) * 2002-03-21 2006-06-06 Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh Power factor correction
US6936973B2 (en) * 2002-05-31 2005-08-30 Jorge M. Parra, Sr. Self-oscillating constant-current gas discharge device lamp driver and method
US20040217838A1 (en) * 2003-04-29 2004-11-04 Lestician Guy J. Coil device
US7348735B2 (en) 2003-05-01 2008-03-25 Inventive Holdings Llc Lamp driver
JP4552118B2 (ja) * 2003-07-11 2010-09-29 東芝ライテック株式会社 放電ランプ点灯装置および電球形蛍光ランプ
US6936970B2 (en) 2003-09-30 2005-08-30 General Electric Company Method and apparatus for a unidirectional switching, current limited cutoff circuit for an electronic ballast
NO322474B1 (no) * 2003-10-21 2006-10-09 Fontenoy Philippe Lysrorarmatur samt fremgangsmate for drift av lysror i slik armatur
JP4771073B2 (ja) * 2005-03-24 2011-09-14 東芝ライテック株式会社 放電ランプ点灯装置および照明装置
DE102005025682B4 (de) * 2005-06-03 2010-04-22 Minebea Co., Ltd., Kitasaku Vorrichtung zur Ansteuerung von Leuchtstofflampen in einer Beleuchtungsanordnung
US8736189B2 (en) * 2006-12-23 2014-05-27 Fulham Company Limited Electronic ballasts with high-frequency-current blocking component or positive current feedback
EP2104402A1 (fr) * 2008-03-17 2009-09-23 Chuan Shih Industrial Co., Ldt. Ballast électronique pour lampes à décharge
US8525503B2 (en) 2010-05-07 2013-09-03 Xandex, Inc. Hybrid rectifier
CN102958261B (zh) * 2011-06-20 2015-08-05 李顺华 一种高压钠灯用的lc电感电容镇流器

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997019578A1 (fr) * 1995-11-21 1997-05-29 Philips Electronics N.V. Circuit
US5757143A (en) * 1995-11-21 1998-05-26 U.S. Philips Corporation Discharge lamp control circuit with feedback loop to lower harmonic distortion
CN1107439C (zh) * 1995-11-21 2003-04-30 皇家菲利浦电子有限公司 电路装置
WO2010027392A1 (fr) * 2008-09-05 2010-03-11 Lutron Electronics Co., Inc. Ballast électronique possédant une topologie de circuit résonant asymétrique
US8067902B2 (en) 2008-09-05 2011-11-29 Lutron Electronics Co., Inc. Electronic ballast having a symmetric topology

Also Published As

Publication number Publication date
DE4410492A1 (de) 1995-09-28
EP0679046B1 (fr) 1999-06-02
DE59506071D1 (de) 1999-07-08
US5521467A (en) 1996-05-28
JP3599823B2 (ja) 2004-12-08
JPH07272885A (ja) 1995-10-20

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