EP1395094A1 - Appareil et procédé permettant de faire fonctionner une lampe - Google Patents

Appareil et procédé permettant de faire fonctionner une lampe Download PDF

Info

Publication number
EP1395094A1
EP1395094A1 EP03015808A EP03015808A EP1395094A1 EP 1395094 A1 EP1395094 A1 EP 1395094A1 EP 03015808 A EP03015808 A EP 03015808A EP 03015808 A EP03015808 A EP 03015808A EP 1395094 A1 EP1395094 A1 EP 1395094A1
Authority
EP
European Patent Office
Prior art keywords
transistor
current
lamp
switching unit
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Withdrawn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
EP03015808A
Other languages
German (de)
English (en)
Inventor
Siegfried Mayer
Arwed Storm
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 EP1395094A1 publication Critical patent/EP1395094A1/fr
Withdrawn legal-status Critical Current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
    • H05B41/26—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
    • 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
    • H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2856—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against internal abnormal circuit conditions
    • 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 present invention relates to a circuit device for operating a lamp, in particular a low-pressure discharge lamp, with an inverter device, the has at least one transistor switching unit for supplying the lamp with alternating current and a current limiting device connected to the at least one transistor switching unit is connected to limit the current through the transistor switching unit.
  • the present invention relates to a corresponding method for operating a lamp.
  • Low-voltage discharge lamps are typically made using an electronic ballast (EVG) operated. It contains the alternating current necessary to operate the lamp usually generated by known half-bridge inverters. With the half bridge a load circuit comprising one or more lamps is operated. The load circuit includes inductive and capacitive elements, resulting in a predetermined load circuit resonance frequency results.
  • EMG electronic ballast
  • the ignition voltage for igniting a lamp by means of a resonance circuit and the thus connected reactive current before ignition can only be achieved by the saturation behavior of the Limit resonance inductance or by reducing the quality of the resonance circuit. So far the open circuit voltage was therefore limited by a resonance choke whose saturation was deliberately chosen low. This measure leads to an additional increase of the resonance current.
  • the current may be limited by a deliberately deteriorated quality of the resonance circuit. However, this deterioration occurs Efficiency and is only practical for devices with lower power.
  • a further developed current limitation is from the European patent EP 0 798 952 B1 known.
  • the electronic ballast described there is one of the inverter transistors in the emitter line the control path of a transistor arranged.
  • this control path becomes the effective emitter resistance of the inverter transistor changes continuously depending on the voltage drop at one of the resonance circuit components and thereby the clock frequency of the inverter increased so much that because of the now greater detuning from the resonant frequency of the resonant circuit a reduction the open circuit voltage in the resonance circuit with simultaneous current limitation becomes.
  • a similar current limiting circuit is known from European patent application EP 0 800 335 A2 known.
  • the control circuits of the half-bridge inverter transistors one auxiliary transistor each, so that the emitter resistance of each half-bridge inverter transistor is formed by a parallel connection consisting of at least one ohmic resistance and the parallel control path of the corresponding one Auxiliary transistor exists.
  • the effective emitter resistance or Feedback of the half-bridge inverter depending on the operating phases of the Lamp switched and so the clock frequency of the half-bridge inverter in a simple manner within wide limits by dimensioning the resistances of the invention Parallel connection can be varied.
  • the auxiliary transistor controlled by the lamp voltage which in turn is the emitter line of a Controls half-bridge transistor.
  • the object of the present invention is an improved type of current limitation by a transistor unit of an inverter device for the operation of Propose lamps.
  • this object is achieved by a switching device for operation a lamp, in particular a low-pressure discharge lamp, with an inverter device for supplying the lamp with alternating current, the at least one transistor switching unit and a current limiting device connected to the at least one transistor switching unit is connected to limit the current through the minimum a transistor switching unit flows, the control electrode with the current limiting device the at least one transistor switching unit can be controlled for current limitation.
  • the above-mentioned object is achieved according to the invention by a method for Operating a lamp, in particular a low-pressure discharge lamp, by generation an alternating current for supplying the lamp by means of at least one transistor switching unit and limiting the current through the at least one transistor switching unit, wherein to control the current, the control electrode of the at least one transistor switching unit is driven becomes.
  • the inverter device can be a half bridge from the at least one transistor unit and a further transistor unit. So the inverter can do a lot can be produced inexpensively from only two active components. If necessary, you can the transistor units each consist of MOSFET transistors.
  • the lamp is preferably operated in a load circuit connected to the inverter device connected.
  • This load circuit preferably comprises an LC resonance circuit to operate the lamp with a defined resonance frequency and a Coupling capacitor to suppress DC components.
  • the circuit device includes an inverter device connected phaser to the operating frequency of the Inverter device to adapt to a resonance frequency of the load circuit.
  • phase setting device can be connected to a control electrode of the at least one transistor switching unit be connected so that the switching process in the transistors of the Inverter device is adapted to the load circuit resonance.
  • the current limiting device is advantageously parallel to the phase setting device on the control electrode of a transistor of the inverter device. So that will regulates the amplitude of the lamp current through the control electrode of the transistor by the switching frequency is adjusted.
  • the current limiting device comprises a switching device, by the at least one transistor switching unit depending on the current through which at least one transistor switching unit can be switched off.
  • a switching device a transistor can be used, which in turn is the transistor switching unit the inverter device on or off.
  • FIG. 1 the course of the envelope of the voltage is shown in FIG. 1 shown when igniting low-pressure discharge lamps.
  • the ignition phase is usually in less than a millisecond completed.
  • the glow phase can take times of one for non-preheated filaments Second.
  • the voltage level during the glow discharge is clear above the level in rated operation UB ..
  • the lamp voltage drops to Operating level. If the lamp does not glow within a time, max in nominal operation switch, the safety shutdown of the device also responds in order to close the components protect.
  • a protective circuit switches the electronic ballast from (see Fig. 2). This serves to protect the half-bridge or inverter transistors because these lead the high current only for a short time interval without permanent damage can.
  • I.d.R. is the time intervals are ignition and glow, max in terms of circuitry linked, so that a protection-related short time also limits the glow phase.
  • the electronic ballast must ensure that the open circuit voltage U0 does not exceed a limit set in the safety standards.
  • the component load is crucial for a reliable ignition and a good lamp life to minimize by low currents and thereby realize a long glow phase to be able to.
  • the open circuit voltage U0 must be within the safety standards be limited to favorable values.
  • the ignition voltage limited by deliberately reducing the saturation limit of the resonance choke.
  • this measure leads to high currents in the inverter.
  • Figure 2 is the use of saturation in current i is characterized by isat and in voltage u by usat.
  • the ignition voltage is therefore reduced in the ignition phase in such a way that the Current in the half-bridge drops and the ignition phase can be extended significantly without that the electronic ballast is damaged.
  • This extension is in Figure 3 indicated.
  • the voltage rises to U02 after switching on.
  • This Value is significantly below the value of U01 according to the state of the art.
  • the typically used Transistors do not suffer any damage even after t Zünd2, because they only do so a current of 12 flows.
  • the electronic ballast is switched off at the latest after t Zünd2 switched off if the lamp does not ignite.
  • the circuit arrangement shown below in connection with FIG. 5 leads through active feedback to the desired current limitation with increased lamp efficiency.
  • the circuit in FIG. 5 shows a lamp LA. It is crossed by a half bridge consisting of the MOSFET transistors T1 and T2 and the capacitor C1. The two transistors T1 and T2 are connected in series, while the capacitor C1 is connected in parallel to transistor T1.
  • An inductor L1-A is between the connection point of the two transistors T1 and T2 and the capacitor C1. she forms together with the capacitor C1 a resonant circuit, the idle frequency or specifies the frequency in the ignition phase.
  • the lamp LA is parallel to that Capacitor C1 connected, between the one electrode of the lamp LA and the one Electrode of the capacitor C 1, a coupling capacitor C2 is arranged, the DC components filtered out of the power supply.
  • the characteristics of the load circuit of the half-bridge are determined in addition to the lamp LA by the components L1-A, C1, and C2.
  • the transistor T2 is connected to ground via a resistor R.
  • This resistor R1 serves, among other control tasks, by detuning the resonant circuit L1, C1 to prevent a so-called resonance catastrophe, in which very high currents arise.
  • phase control circuit Between the gate of transistor T2 and ground is a so-called phase control circuit connected.
  • This phase control circuit causes the frequency of the half bridge to Resonance frequency of the load circuit is adjusted.
  • the phase controller circuit consists of a parallel connection of a resistor R2, a capacitor C2 and a coil L2.
  • the phase shift results from the dimensioning of the reactances C2 and L2.
  • European patent EP 0 781 077 B1 is referred to the European patent EP 0 781 077 B1.
  • the control voltage for the gate of transistor T2 is generated by a coil L1-B which is magnetically coupled to the coil L1-A and thus the one generated by the half-bridge Voltage is coupled into the gate circuit of transistor 2 to control it.
  • the sink For this purpose, L1-B is connected between the resistor R2 and ground.
  • the bipolar transistor T3 used the base of which is controlled by the voltage dropping across the resistor R1 becomes.
  • a zener diode D1 switched, which together with one connected between the base of transistor T3 and ground Capacitor C3 causes transistor T3 only in a higher current range, i.e. is active during the ignition phase and the transistor T2 in every switching cycle if necessary switches off prematurely. This causes an increase in the switching frequency. at lower voltages, i.e. during the glow and burn phase the transistor T3 not activated and therefore not the transistor T2 of the half bridge for current limitation off.
  • the emitter of transistor T3 is connected to ground and the collector is on the center of two Zener diodes D2 and D3, which are parallel to the phase control circuit, i.e. are connected between the gate of transistor T2 and ground.
  • Figure 4 shows the current in the MOSFET transistor T2 in the ignition phase.
  • a solid one Line describes the current profile without current limitation
  • a dashed line describes the current profile with current limitation according to the invention.
  • the frequency increase of the Half-bridge is reached by switching off at switching threshold 12 prematurely.
  • the cycle time tz1 without limiter circuit is much longer than the cycle time tz2 with limiter circuit. So that the turn-off transistor T3 does not work in the linear range and so that the MOSFET transistor T2 turns off completely, the capacitor C3 is inserted. After the lamp LA has been ignited and then glow phase, the current drops through the transistor T2 well below the switching threshold 12, so that the current limiter circuit no longer intervenes during continuous lamp operation.
  • the operating frequency is thus seen in the circuit according to the invention the half bridge through the phase adjuster R2, C2, L2 to the resonance frequency of the load circuit L1-A, C1, C2, LA adjusted and the current flowing through transistor T2 through the gate of the transistor T2 through the current limiting circuit D1, D2, D3, T3, C3 during the Firing phase limited.
  • the gate of transistor T1 is also driven by a phase control circuit and the control voltage is also generated by a magnetically coupled inductor.
  • a current limiting circuit as used to control the gate of transistor T2 is used, does not need to be used to control the gate of the transistor T1 because the discharge current from the coil L1-A is automatically limited when the charge current was limited. This can easily be deduced from the energy balance of the coil L1-A.
  • the current limitation is effected by the corresponding control of the gate of transistor 2 now, as already indicated, that the current through the transistors T1 and T2 limits is, so that their lifespan increases significantly, and that the ignition phase is extended can be. Lamps can also be ignited with the circuit according to the invention that have a significantly longer ignition phase than the maximum duration of the ignition phase of have conventional electronic ballasts.
EP03015808A 2002-08-01 2003-07-10 Appareil et procédé permettant de faire fonctionner une lampe Withdrawn EP1395094A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10235217 2002-08-01
DE10235217A DE10235217A1 (de) 2002-08-01 2002-08-01 Schaltungsvorrichtung und Verfahren zum Betreiben einer Lampe

Publications (1)

Publication Number Publication Date
EP1395094A1 true EP1395094A1 (fr) 2004-03-03

Family

ID=30469328

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03015808A Withdrawn EP1395094A1 (fr) 2002-08-01 2003-07-10 Appareil et procédé permettant de faire fonctionner une lampe

Country Status (7)

Country Link
US (1) US7053561B2 (fr)
EP (1) EP1395094A1 (fr)
KR (1) KR20040012597A (fr)
CN (1) CN1481206A (fr)
CA (1) CA2436167A1 (fr)
DE (1) DE10235217A1 (fr)
TW (1) TW200403960A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7924584B1 (en) 2004-01-29 2011-04-12 Marvell International Ltd. Power supply switching circuit for a halogen lamp
DE102004017479A1 (de) * 2004-04-08 2005-10-27 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH EVG mit Resonanzanregung zur Übernahmespannungserzeugung
US7525293B1 (en) * 2004-12-06 2009-04-28 Marvell International Ltd. Power supply switching circuit for a halogen lamp
US7456583B2 (en) * 2006-09-05 2008-11-25 General Electric Company Electrical circuit with dual stage resonant circuit for igniting a gas discharge lamp
CN101277571B (zh) * 2007-03-30 2014-02-12 电灯专利信托有限公司 放电灯的点燃控制方法及相应的电子镇流器电路
US8576583B2 (en) * 2010-09-17 2013-11-05 Fairchild Semiconductor Corporation Sampled charge control for resonant converter
CN113824495B (zh) * 2021-11-23 2022-04-01 深圳维普创新科技有限公司 一种计算Q-Factor的电路、方法、装置及电子设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2900910A1 (de) * 1979-01-11 1980-07-24 Siemens Ag Vorschaltgeraet fuer den betrieb von gasentladungslampen
US5925984A (en) * 1995-12-22 1999-07-20 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Circuit arrangement having LC parallel tuned drive circuitry
US6181083B1 (en) * 1998-10-16 2001-01-30 Electro-Mag, International, Inc. Ballast circuit with controlled strike/restart
US6188553B1 (en) * 1997-10-10 2001-02-13 Electro-Mag International Ground fault protection circuit

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4425859A1 (de) * 1994-07-21 1996-01-25 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Betrieb einer oder mehrerer Niederdruckentladungslampen
DE19612170A1 (de) 1996-03-27 1997-10-02 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Betrieb von elektrischen Lampen und Betriebsverfahren für elektrische Lampen
DE19613149A1 (de) 1996-04-03 1997-10-09 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Betrieb elektrischer Lampen
DE19709545A1 (de) * 1997-03-07 1998-09-10 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltsteuerung einer Betriebsschaltung
DE19751063A1 (de) * 1997-11-18 1999-05-20 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Freischwingende Oszillatorschaltung mit einfacher Anlaufschaltung
DE19905487A1 (de) * 1999-02-11 2000-08-31 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Betrieb mindestens einer Niederdruckentladungslampe
US6194845B1 (en) * 1999-11-03 2001-02-27 Osram Sylvania Inc. Ballasts with tapped inductor arrangements for igniting and powering high intensity discharge lamps
US6424101B1 (en) * 2000-12-05 2002-07-23 Koninklijke Philips Electronics N.V. Electronic ballast with feed-forward control

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2900910A1 (de) * 1979-01-11 1980-07-24 Siemens Ag Vorschaltgeraet fuer den betrieb von gasentladungslampen
US5925984A (en) * 1995-12-22 1999-07-20 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Circuit arrangement having LC parallel tuned drive circuitry
US6188553B1 (en) * 1997-10-10 2001-02-13 Electro-Mag International Ground fault protection circuit
US6181083B1 (en) * 1998-10-16 2001-01-30 Electro-Mag, International, Inc. Ballast circuit with controlled strike/restart

Also Published As

Publication number Publication date
US20040245942A1 (en) 2004-12-09
DE10235217A1 (de) 2004-02-19
TW200403960A (en) 2004-03-01
CN1481206A (zh) 2004-03-10
US7053561B2 (en) 2006-05-30
KR20040012597A (ko) 2004-02-11
CA2436167A1 (fr) 2004-02-01

Similar Documents

Publication Publication Date Title
EP1333707B1 (fr) Ballast électronique pour une lampe à décharge
EP0801881B1 (fr) Procede permettant de faire fonctionner au moins une lampe a fluorescence au moyen d'un ballast electronique et ballast electronique utilise a cet effet
EP0800335B1 (fr) Circuit pour alimenter des lampes électriques
DE60205830T2 (de) Vorschaltgerät mit effizienter Elektroden-Vorheizung und Lampenfehlerschutz
DE4014391A1 (de) Lichtstellsystem fuer kompakt-leuchtstoffroehren
DE3447486A1 (de) Treiber zum betrieb eines elektrischen verbrauchers sowie mit einem solchen treiber aufgebautes steuergeraet oder steuereinrichtung
EP1465330A2 (fr) Procédé pour varier la consommation de puissance de charges capacitives
DE60022289T2 (de) Zünder für eine hochdruck-gasentladungslampe
DE69911376T2 (de) Verfahren und anordnung zum betreiben von elektronischen vorschaltgeräten für entladungslampen hoher intensität
EP1938670B1 (fr) Ballaste electronique et procede pour faire fonctionner une lampe electrique
EP1395094A1 (fr) Appareil et procédé permettant de faire fonctionner une lampe
EP2168229A1 (fr) Ensemble circuit pourvu d'un transformateur de tension et procédé correspondant
EP2111730B1 (fr) Procédé de commande d'un circuit en demi-pont, et circuit en demi-pont correspondant
DE102004037389C5 (de) Verfahren zur Ansteuerung einer eine Leuchtstofflampe aufweisenden Last zur Optimierung des Zündvorganges
WO2005107339A1 (fr) Dispositif pour produire un train d'impulsions de tension electrique, notamment pour faire fonctionner des lampes a decharge capacitive
EP1771045B1 (fr) Circuit d' amorçage pour une lampe à décharge haute-pression
EP2484183B1 (fr) Ballast électronique et procédé de fonctionnement d'au moins une lampe à décharge
EP2103192B1 (fr) Montage électrique et procédé pour allumer et faire fonctionner une ou plusieurs lampes à décharge
EP2138014A1 (fr) Circuiterie pour l'allumage et l'utilisation d'une lampe à décharge
DE102005020414A1 (de) Phasenanschnittsteuerung
DE60225818T2 (de) Schaltungsanordnung
DE3503778C2 (de) Leuchtstofflampen-Vorschaltgerät
EP0165893B1 (fr) Dispositif de commande de luminosité pour une lampe fluorescente
EP1902598B1 (fr) Ensemble circuit et procede pour faire fonctionner au moins une lampe electrique
WO2008128574A1 (fr) Ensemble circuit servant à amorcer et à faire fonctionner au moins une lampe à décharge

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

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

17P Request for examination filed

Effective date: 20040322

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

17Q First examination report despatched

Effective date: 20050315

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20050726