WO2012167292A1 - Procédé de fonctionnement d'un ballast électronique pour un luminaire, ainsi que ballast électronique - Google Patents

Procédé de fonctionnement d'un ballast électronique pour un luminaire, ainsi que ballast électronique Download PDF

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Publication number
WO2012167292A1
WO2012167292A1 PCT/AT2012/000156 AT2012000156W WO2012167292A1 WO 2012167292 A1 WO2012167292 A1 WO 2012167292A1 AT 2012000156 W AT2012000156 W AT 2012000156W WO 2012167292 A1 WO2012167292 A1 WO 2012167292A1
Authority
WO
WIPO (PCT)
Prior art keywords
electronic ballast
input voltage
vin
reference value
output power
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.)
Ceased
Application number
PCT/AT2012/000156
Other languages
German (de)
English (en)
Inventor
Peter Lampert
Frank Lochmann
Rainer Troppacher
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.)
Tridonic GmbH and Co KG
Original Assignee
Tridonic GmbH and Co KG
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 Tridonic GmbH and Co KG filed Critical Tridonic GmbH and Co KG
Priority to EP12735185.6A priority Critical patent/EP2719259B1/fr
Publication of WO2012167292A1 publication Critical patent/WO2012167292A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H05B41/285—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
    • H05B41/2853—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal power supply conditions
    • 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

Definitions

  • the present invention relates to a method for operating an electronic ballast for a light source, such as a gas discharge lamp or light emitting diode (LED), as well as a correspondingly designed electronic ballast.
  • a light source such as a gas discharge lamp or light emitting diode (LED)
  • LED light emitting diode
  • Electronic ballasts are usually used for certain bulbs, such as gas discharge lamps or light emitting diodes, to reliably start or ignite the light source and to operate with optimum efficiency and the best possible light output.
  • the electronic ballasts are designed such that they operate the respective lighting means with the respectively suitable frequency, wherein in addition the current supplied to the lighting means is limited.
  • Modern electronic ballasts usually have a circuit for power factor correction (“PFC”) and can also be equipped with a variety of additional functions, in particular various monitoring functions or dimming functions.
  • PFC power factor correction
  • electronic ballasts may be provided with an overvoltage monitoring, wherein the supply voltage supplied to the electronic ballast is monitored and a warning signal is generated in the event that it exceeds a predetermined reference value.
  • ITG Intelligent Temperature Guard
  • the present invention is therefore an object of the invention to provide a method for operating an electronic ballast and a correspondingly designed electronic ballast, whereby a reliable operation of the electronic ballast over the widest possible temperature range can be achieved.
  • the input voltage of the electronic ballast or a variable representing the input voltage is monitored and compared with a reference value, the reference value representing a still tolerable minimum value for the input voltage of the electronic ballast. If an undershooting of this reference value or threshold value is detected, the electronic ballast is activated in such a way that the power output to the lighting means is reduced and thus the lighting means is dimmed accordingly.
  • the invention is based on the finding that the components of an electronic ballast heat up more strongly at low voltages, so that safety problems at low input voltage values can be avoided by lowering the output power of the electronic ballast in the previously described undervoltage case.
  • the problem occurring in electronic ballasts of the so-called triangular temperature, ie occurring at the electronic ballast highest temperature, with a high dimming level and a maximum ambient temperature is based on the finding that the components of an electronic ballast heat up more strongly at low voltages, so that safety problems at low input voltage values can be avoided by lowering the output power of the electronic ballast in the previously described undervoltage case.
  • the problem occurring in electronic ballasts of the so-called triangular temperature ie occurring at the electronic ballast highest temperature, with a high dimming level and a maximum ambient temperature.
  • the electronic ballast can be operated at relatively low temperatures despite low input voltage with maximum output power, or the electronic ballast can generate light even at very low input voltages with at least low output power (for example, unbalanced load).
  • operating parameters of the luminous means in particular the current or the voltage of the luminous means, can also be evaluated and used in adjusting the output power of the electronic ballast, i. be taken into account when setting the dimming level, so that indirectly, the lamp temperature can be considered.
  • the input voltage can be detected both directly and derived from other operating parameters of the electronic ballast, in particular from operating parameters of a power factor correction circuit of the ballast.
  • the invention is generally suitable for use in electronic ballasts for operation with any lighting means, such as, in particular, gas discharge lamps, halogen incandescent lamps or light emitting diodes.
  • Fig. 1 shows a block diagram of an electronic ballast according to a preferred embodiment of the present invention
  • Fig. 2 shows various characteristics which may be provided in the case of the electronic ballast shown in Fig. 1 upon detection of too low an input voltage for adjusting the output power of the electronic ballast.
  • FIG. 1 shows schematically an exemplary embodiment of an electronic ballast 9 according to the invention for operation with a luminous means 10, for example a gas discharge lamp.
  • the electronic ballast 9 is connected on the input side via a high-frequency filter 1 to a (not shown) supply voltage source.
  • the output of the high-frequency filter 1 is connected to a rectifier circuit 2, which converts the supply voltage into a rectified voltage, with which a power factor correction circuit 3 is operated, which is provided for smoothing and harmonic filtering.
  • the power factor correction circuit 3 in the form of a boost converter or boost converter with a smoothing capacitor C1, an inductance L, a controllable switch S1 of a diode D and an output-side storage capacitor C2 configured.
  • the power factor correction circuit 3 comprises a measuring circuit with resistors R1 and R2, with the aid of which, depending on the operating phase of the power factor correction circuit 3, one of the output voltage at the capacitor C2 corresponding measured variable or the current through the inductance L corresponding measured variable and a preferably in the form of a in - Integrated circuit, in particular in the form of an ASIC ("Application Specific Integrated Circuit") trained control unit 4 is supplied.
  • the control unit 4 controls the switch S1, which can be designed as a MOS field-effect transistor, in such a way that it is switched on and off alternately at specific times.
  • the intermediate circuit voltage applied to the capacitor C2 is fed to an inverter 5, which comprises two controllable switches S2 and S3 arranged in a half-bridge circuit.
  • the switches S2 and S3 are in turn preferably designed as MOS field-effect transistors.
  • control circuit 7 which is preferably formed as an ASIC.
  • an undervoltage monitoring functionality is integrated with respect to the input voltage Vin of the electronic ballast, which will be explained in more detail below.
  • the control circuit 7 is supplied with a measured variable representing the input voltage Vin of the electronic ballast 9.
  • the control circuit 7 can detect the input voltage 7 directly or else indirectly from the voltage applied to the power factor correction circuit 3 or from the aforementioned measurement information obtained with the aid of the voltage divider formed by the resistors R1 and R2 in the power factor correction circuit 3, derive, as indicated by dashed lines in Fig. 1.
  • control circuit 7 detects that the monitored input voltage Vin reaches or falls below a predetermined reference value, is controlled by the control circuit of the inverter 5 and the switches S2 and S3 such that the output to the load circuit 6 and the lamp 10 output power is reduced, which has a corresponding dimming of the bulb 10 result.
  • this undervoltage detection can be combined with further input parameters, which are also evaluated by the control circuit 7, in order to ensure sufficient performance of the electronic ballast 9 over a wide temperature range.
  • the undervoltage monitoring can be combined with a monitoring of the ambient temperature T of the electronic ballast, for which purpose a temperature sensor 8 is provided which can be arranged directly on the control circuit 7 or also externally of the electronic ballast 9.
  • the temperature sensor 8 detects a value representing the ambient temperature T of the electronic ballast and feeds it to the control circuit 7, so that the control circuit 7 can detect the inverter 5 not only as a function of the input voltage but also as a function of the temperature when an undervoltage condition is detected, in particular the drive of the inverter is carried out according to a stored in the control circuit 7 characteristic which is dependent both on the input voltage Vin and on the temperature T. This will be explained in more detail below with reference to FIG. 2.
  • FIG. 2 shows by way of example a dimming characteristic curve a for the inverter 5 which is dependent on the input voltage Vin, the output power P being plotted as a percentage of the maximum output power via the input voltage Vin indicated by its effective value Vrms.
  • V1 an undervoltage reference value
  • the Inverter 5 controlled such that the output to the light emitting means 10 output power of the characteristic a is reduced accordingly to dim the illuminant down to a dimming level DL.
  • the characteristic curve used in each case is selected depending on the ambient temperature.
  • Two further characteristic curves b and c are shown by way of example in FIG.
  • the characteristic curve a can correspond, for example, to an ambient temperature of 60 ° C., whereby the associated low-voltage reference value V1 can be at 190V.
  • the characteristic curve b may for example be associated with an ambient temperature of 25 ° C., whereby the corresponding undervoltage reference value V 2 may be at 170V.
  • the characteristic curve c can finally correspond, for example, to an ambient temperature of -25 ° C., whereby the corresponding undervoltage reference value V3 can be at 150V.
  • the characteristic control can be such that the electronic ballast even at very low input voltage still generates light, for example, unbalanced load.
  • V4 which may be of the order of 40V, for example
  • the dimming level DL corresponds, for example, to an output power in the range of a few percent of the maximum output power can.
  • control circuit 7 can also evaluate further parameters in order to take account of additional operating cases.
  • the control circuit can also evaluate the voltage V L or the current I L of the luminous means, these parameters, which in particular allow conclusions about the temperature of the luminous means 10, to be made available to the control circuit 7 by the load circuit 6.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

Afin de faire fonctionner un ballast électronique (9) pour un luminaire (10), une tension d'entrée (Vin) du ballast électronique (9) est détectée et comparée avec une valeur de référence (V1 - V3), laquelle représente une tension d'entrée minimale tolérable du ballast électronique (9). Si la tension d'entrée est inférieure à la valeur de référence (V1 - V3), c'est-à-dire si une sous-tension est détectée, une puissance électrique de sortie fournie par le ballast électronique (9) au luminaire (10) est réduite.
PCT/AT2012/000156 2011-06-08 2012-06-06 Procédé de fonctionnement d'un ballast électronique pour un luminaire, ainsi que ballast électronique Ceased WO2012167292A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12735185.6A EP2719259B1 (fr) 2011-06-08 2012-06-06 Ballast électronique et procédé de fonctionnement d'un ballast électronique pour une lampe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011103638A DE102011103638A1 (de) 2011-06-08 2011-06-08 Verfahren zum Betreiben eines elektronischen Vorschaltgeräts für ein Leuchtmittel und elektronisches Vorschaltgerät
DE102011103638.9 2011-06-08

Publications (1)

Publication Number Publication Date
WO2012167292A1 true WO2012167292A1 (fr) 2012-12-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2012/000156 Ceased WO2012167292A1 (fr) 2011-06-08 2012-06-06 Procédé de fonctionnement d'un ballast électronique pour un luminaire, ainsi que ballast électronique

Country Status (3)

Country Link
EP (1) EP2719259B1 (fr)
DE (1) DE102011103638A1 (fr)
WO (1) WO2012167292A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2849538A1 (fr) * 2013-08-08 2015-03-18 Tridonic GmbH & Co KG Dispositif et procédé de détermination indirecte d'une alimentation électrique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017220582A1 (de) * 2017-11-17 2019-05-23 Tridonic Gmbh & Co Kg Betriebsschaltung für ein LED-Leuchtmittel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020109467A1 (en) * 2001-02-13 2002-08-15 Koito Manufacturing Co., Ltd. Discharge-lamp lighting circuit
EP1324643A1 (fr) * 2001-12-27 2003-07-02 TridonicAtco GmbH & Co. KG Ballast électronique avec protection en température
EP2076095A2 (fr) * 2007-12-31 2009-07-01 Lumination LLC Feu de signalisation tricolore à DEL
US7606679B1 (en) * 2006-09-25 2009-10-20 Semiconductor Components Industries, L.L.C. Diagnostic and maintenance systems and methods for LED power management integrated circuits
EP2244536A1 (fr) * 2003-11-12 2010-10-27 Lutron Electronics Co., Inc. Protection thermique pour ballast de lampe
US20110068703A1 (en) * 2009-09-18 2011-03-24 Boca Flasher, Inc. 90-260Vac Dimmable MR16 LED Lamp

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Publication number Priority date Publication date Assignee Title
EP0338109B1 (fr) * 1988-04-20 1994-03-23 Zumtobel Aktiengesellschaft Convertisseur pour lampe à décharge
EP0677982B1 (fr) * 1994-04-15 2000-02-09 Knobel Ag Lichttechnische Komponenten Procédé pour commander un ballast de lampes à décharge
FI101186B1 (fi) * 1996-12-16 1998-04-30 Helvar Oy Lämpösuojapiirillä varustettu elektroninen liitäntälaite
DE102004007006A1 (de) * 2004-02-12 2005-08-25 Lamptronic International Gmbh & Co.Kg Temperaturgesteuertes, elektronisches Vorschaltgerät für Gasentladungslampen
DE102004009583A1 (de) * 2004-02-25 2005-09-29 Vossloh-Schwabe Elektronik Gmbh Vorschaltgerät mit verbesserter Notstrombetriebsumschaltung
WO2008155714A1 (fr) * 2007-06-20 2008-12-24 Koninklijke Philips Electronics N.V. Commande de lampe, système d'éclairage et procédé

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020109467A1 (en) * 2001-02-13 2002-08-15 Koito Manufacturing Co., Ltd. Discharge-lamp lighting circuit
EP1324643A1 (fr) * 2001-12-27 2003-07-02 TridonicAtco GmbH & Co. KG Ballast électronique avec protection en température
EP2244536A1 (fr) * 2003-11-12 2010-10-27 Lutron Electronics Co., Inc. Protection thermique pour ballast de lampe
US7606679B1 (en) * 2006-09-25 2009-10-20 Semiconductor Components Industries, L.L.C. Diagnostic and maintenance systems and methods for LED power management integrated circuits
EP2076095A2 (fr) * 2007-12-31 2009-07-01 Lumination LLC Feu de signalisation tricolore à DEL
US20110068703A1 (en) * 2009-09-18 2011-03-24 Boca Flasher, Inc. 90-260Vac Dimmable MR16 LED Lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2849538A1 (fr) * 2013-08-08 2015-03-18 Tridonic GmbH & Co KG Dispositif et procédé de détermination indirecte d'une alimentation électrique

Also Published As

Publication number Publication date
EP2719259A1 (fr) 2014-04-16
EP2719259B1 (fr) 2019-10-30
DE102011103638A1 (de) 2012-12-13

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