EP1872630A1 - Chauffage intelligent par convertisseur a transfert indirect - Google Patents

Chauffage intelligent par convertisseur a transfert indirect

Info

Publication number
EP1872630A1
EP1872630A1 EP06723975A EP06723975A EP1872630A1 EP 1872630 A1 EP1872630 A1 EP 1872630A1 EP 06723975 A EP06723975 A EP 06723975A EP 06723975 A EP06723975 A EP 06723975A EP 1872630 A1 EP1872630 A1 EP 1872630A1
Authority
EP
European Patent Office
Prior art keywords
circuit
heating
voltage
software
ballast
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
EP06723975A
Other languages
German (de)
English (en)
Other versions
EP1872630B2 (fr
EP1872630B1 (fr
Inventor
Dietmar Klien
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
Tridonicatco 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=36329195&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1872630(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Tridonicatco GmbH and Co KG filed Critical Tridonicatco GmbH and Co KG
Priority to EP09159438A priority Critical patent/EP2111085B1/fr
Publication of EP1872630A1 publication Critical patent/EP1872630A1/fr
Application granted granted Critical
Publication of EP1872630B1 publication Critical patent/EP1872630B1/fr
Publication of EP1872630B2 publication Critical patent/EP1872630B2/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H05B41/295—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
    • H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2985—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating 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
    • H05B41/295—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

Definitions

  • the present invention relates to circuits for heating gas discharge lamps, in particular fluorescent lamps, as they can be found, for example, in electronic ballasts (ECGs) use.
  • ECGs electronic ballasts
  • ECGs Electronic ballasts for fluorescent lamps are known from the prior art, which use Wendel carvingscen which are connected by means of a coupling element with a primary side, which is supplied with voltage. For example, starting from an output circuit
  • the heating energy transformer, capacitive, etc. are coupled in the primary circuit, which in turn is connected to the helices.
  • a coil heater for fluorescent lamps according to the flyback principle is known for example from US 5,703,441.
  • WO 00/72640 A1 shows a filament heater with a heating transformer having a primary winding connected to the output of the inverter of the electronic ballast and the secondary winding located in a heating circuit with a filament for heating each of the two electrodes of a gas discharge lamp.
  • a series circuit is provided which contains the primary winding of the heating transformer and an electronic switch device.
  • WO 03/045117 shows a converter which is likewise switched off in the event of an error.
  • WO 00/72642 shows a heater powered from the midpoint of an inverter.
  • a fluorescent lamp and with a coupling element for transmitting the heating energy from a primary side to a secondary side "intelligent" in the sense that in the presence of except Standard operating parameters are met.
  • a circuit for heating at least one filament of a gas discharge lamp has • a coupling element which transfers the heating energy from a primary side supplied with voltage to a secondary side, with at least one turn, is connected to heating coil.
  • the transmission of heating energy is usually carried out under galvanic isolation.
  • a monitoring circuit which detects the current flow at least in the primary side of the coupling element, so that corresponding countermeasures can be taken by changing at least one operating parameter of the heating circuit when an impermissible current flow is detected.
  • the heating circuit can be switched to an error mode in which the energy transfer of the coupling element is limited to a predetermined value greater than zero. In this error mode, therefore, heating energy continues to be transmitted, albeit to a controlled degree.
  • a base load can be provided, which consumes the energy transmitted through the coupling element in the event that no lamp is used and thus there is no heating coil.
  • This base load can be formed by resistors of a voltage divider, which is also used to detect the secondary side voltage.
  • the coupling element can be clocked on the primary side by means of a switch, the switching frequency and / or duty cycle in the error mode compared to the regular operation modified, in particular reduced. The change in the switching frequency and / or the duty cycle of the switch on the primary side of the coupling element thus represents a possibility of changing operating parameters of the heating circuit.
  • the monitoring circuit can also detect the voltage on the secondary side of the coupling element.
  • the monitoring circuit is preferably implemented by hardware, so that upon detection of a fault, a quick response can occur.
  • This hardware implemented monitoring circuit can send a message to a software controlled controller in the presence of the error mode.
  • a software-controlled controller can in principle transmit operating parameters to the hardware-implemented monitoring circuit at least in the error mode and / or during normal operation of the heating circuit.
  • a circuit for heating at least one filament of a gas discharge lamp wherein in turn a coupling element serves to transfer heating energy from a voltage-supplied primary side to a secondary side, which is connected to the coil to be heated.
  • a monitoring circuit may be provided to detect the voltage of a secondary side of the coupling element, and upon detection of a non-standard Voltage, in particular too high a voltage to take countermeasures by changing an operating parameter of the heating circuit.
  • the coupling element may be capacitive or transformable.
  • the coupling element may comprise a clocked flyback converter ("flyback power converter").
  • the invention also relates to a control gear with such a circuit.
  • an electronic ballast which has a heating circuit for at least one filament of a gas discharge lamp.
  • the transmission of the heating energy from a power supply to the coil to be heated is effected by means of a coupling element that is driven by a circuit implemented in hardware.
  • the implemented in hardware circuit may also monitor an operating parameter of the primary and / or secondary side of the coupling element.
  • a software-controlled circuit can be provided to transmit setpoints for the operation of the coupling element to the circuit implemented in hardware.
  • the invention also provides an electronic ballast for fluorescent lamps with a heating circuit, in which a monitoring circuit monitors at least one operating parameter of the heating circuit and transmits error messages with respect to the heating circuit to a software-controlled circuit.
  • the software controlled circuit can be activated when an input is received Error message at least one operating parameters of the ballast and in particular an operating parameter of the heating circuit depending on the current operating state of the ballast, change.
  • the invention further relates to methods for heating the coil of at least one gas discharge lamp and to methods for operating an electronic ballast.
  • Fig. 1 shows a schematic block diagram of a heating circuit according to the invention
  • FIG. 2 shows a state diagram for operations that may be performed by the software-controlled microcontroller according to the present invention.
  • the heating circuit shown in Fig. 1 is used to provide electrical energy for coils 5, 6 a
  • Gas discharge lamp such as a
  • Fluorescent lamp The energy is transmitted from a primary side of a coupling element, which is supplied with voltage, toward a secondary side of the coupling element, wherein the secondary side is connected to at least one coil 5, 6.
  • the coupling element is designed as a clocked flyback converter. Other Transformative or capacitive designs are possible.
  • the primary side of the flyback converter has a voltage supply and a primary coil 2 connected in series with a switch 12.
  • the voltage supply is a DC voltage supply, so that, for example, the intermediate circuit voltage or bus voltage V bus that is usually regulated by a smoothing circuit (PFC, Power Factor Correction Circuit) can be used in an electronic ballast.
  • PFC Power Factor Correction Circuit
  • electrical energy is transmitted from the primary coil 2 to the secondary side, wherein the secondary side in the illustrated example depending on a branch from a first secondary coil 3 to a first coil 5 and a second secondary coil 4 to a second coil. 6 having.
  • the secondary side can thus supply one or more coils 5, 6.
  • the heat energy transmitted in the clocked flyback converter essentially depends on the switching frequency and the switch-on time T 0n of the switch 12.
  • This switch 12 which may be embodied as an FET, for example, is controlled by a heating control circuit 7 implemented in hardware.
  • the coil heating as I said one clocked flyback converter which is operated with a defined on-time T 0n and frequency f.
  • the switch control thus allows independent operation of the heating circuit, which, for example.
  • Heating circuit to an inverter center point is not the case.
  • the independent operation of the heating circuit is just advantageous for preheating. Furthermore, there are design freedoms, which is advantageous for a dimming operation or a multi-lamp operation.
  • the setpoint values for the switch-on time T 0n and the frequency f of the switching operations of the electronic switch 12 are set according to the invention by means of a software-controlled circuit (microcontroller) 9, which communicates bidirectionally with the heating control circuit 7
  • microcontroller 9 is calculated as a function of the current dimming state of the lamp and of a possibly detected lamp type (for example via the filament current) and then given to the heating control circuit 7.
  • the microcontroller 9 can receive, for example via an interface 10 dimming commands, for example, according to the DALI standard.
  • the primary side with the coil 2 and the switch 12 of the flyback converter transformer is connected in the illustrated example to an intermediate circuit voltage or bus voltage V bus , since this always has a substantially constant potential, which ensures that at a constant on-time T 0n and frequency f of the electronic switch 12, a constant heating energy is delivered to the secondary side of the flyback converter.
  • the illustrated invention is now particularly designed to detect fault conditions of the heating circuit and to take appropriate countermeasures in a timely manner.
  • the heating control circuit 7 detects a fault condition and automatically transitions to an error mode.
  • This error mode can be, for example, that continues to heat energy is transferred with a value greater than zero by means of the coupling element to the secondary side.
  • the frequency f and / or the turn-on time of the switch 12 of the flyback converter is preferably reduced to reduce the primary-side filament current in the event of such a short-circuit condition.
  • heating energy continues to be transmitted.
  • the coupling element designed here as a flyback converter, are completely switched off, so that heat energy is no longer transmitted in fault mode.
  • Another error condition may be that there is no load on the secondary side, i.
  • the lamp with the coils 5, 6 is not used or at least one coil is broken. Since in this case the missing load, the coupling element of the heating circuit normally continues to transmit heat energy to the secondary side, the voltage on the secondary side .ggf. Inadmissibly high values increase, so that components on the secondary side can be damaged.
  • a voltage divider R3, R4 is provided in the illustrated embodiment, at the midpoint of which a signal 14 for the heating control circuit 7 is tapped. The detection of the secondary-side voltage of the coupling element can be carried out alternatively or additionally to the detection of the primary-side helical current 13.
  • a suitable countermeasure may be that the frequency f and / or the switch-on time T 0n of the switch 12 is reduced, so that a significantly reduced heating energy compared to the normal operating condition Secondary side is transmitted. Alternatively, the transmission of the heating energy can also be stopped here.
  • the heating control circuit 7 is implemented by means of hardware, it can quickly detect such error conditions and accordingly also quickly by a suitable change of an operating parameter for the coupling element (in the present example Switch-on period and / or the frequency of the switch).
  • the setpoint values for the heating operation can be specified by the software-controlled microcontroller 9 via the bidirectional communication channel 8 to the hardware-implemented heating control circuit 7 for normal operation and / or the fault mode.
  • the hardware-implemented heating control circuit 7 automatically reacts very quickly to any detected fault conditions, but also simultaneously reports such an error condition to the microcontroller 9.
  • the microcontroller 9 Independently of the secondary-side voltage detection of the heating control circuit 7 by means of the voltage divider R3, R4, the microcontroller 9 detects the filament current through the resistor Rl, thus to detect the type of lamp used via the filament resistor, and depending on this type of lamp the corresponding setpoint specifications for the heating control circuit 7 to make.
  • the communication via the bidirectional channel 8 between the heating control circuit 7 and the controller 9 is preferably digital.
  • the microcontroller 9 can query the heating control circuit 7 for information regarding the presence of an error and possibly also the type of an error (short circuit or idle state without load, etc.).
  • the reduced heating energy transmitted in the fault mode is reduced by the resistors R3, R4 as a base load whose series resistance is thus dimensioned such that the voltage applied during the transmission of the reduced heating energy in the fault mode voltage on the secondary side is limited to a permissible value.
  • the divider ratio of R3, R4 sets the cutoff voltage, i. the voltage from which an impermissibly high secondary voltage is closed and countermeasures are taken.
  • the voltage divider R3, R4 thus has a double function.
  • the series resistance can, for example, be dimensioned so that when transmitting a heating energy of 50 mW in fault mode, the voltage applied to 15 V is limited. At 15 V, damage to the secondary-side components provided can be ruled out.
  • a heating energy of 50 MW is large enough to generate a measurement current sufficient for measurement through the resistor Rl.
  • the implemented in hardware heating control circuit 7 thus ensures that the heating circuit protects itself quickly. If this protection mechanism were implemented by a software controlled circuit, the protection reaction might be too slow to avoid damaging the transistor 12. If the microcontroller 9 queries a fault condition of the heating control circuit 7 or the heating control circuit transmits from itself the microcontroller 9 a fault condition and possibly also the nature of the error, the microcontroller 9 via outgoing commands 11, the operating device (electronic ballast EVG) in total switch to error mode. The reaction of the microcontroller 9 to the message or the query of a fault condition of the heating circuit depends on the current operating state of the device. Possible actions initiated by the microcontroller 9 in the operating device are, for example, switching off the inverter or waiting for a lamp replacement.
  • FIG. 2 schematically shows a state diagram as implemented by software in the microcontroller 9.
  • the software is first started in the STARTUP SOFTWARE state.
  • the known preheating begins in the PREHEAT state and, after completion of the preheating, the ignition of the lamp begins. If the lamp is successfully ignited, the system switches to RUN mode. Only when the lamp is in the RUN state, an error of the heating circuit is evaluated by the microcontroller 9. If there is an error starting from the state RUN, then ERROR is switched to the error mode.
  • the microcontroller 9 waits for the replacement of the lamp, since it can detect the presence of a lamp with coils via the resistor Rl. After the lamp has been replaced, the state RELAMP is assumed, from which a restart of the lamp is possible.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Dc-Dc Converters (AREA)
  • Synchronizing For Television (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)
EP06723975.6A 2005-04-22 2006-04-03 Chauffage intelligent par convertisseur a transfert indirect Not-in-force EP1872630B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09159438A EP2111085B1 (fr) 2005-04-22 2006-04-03 Chauffage intelligent par convertisseur à transfert indirect

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005018761A DE102005018761A1 (de) 2005-04-22 2005-04-22 Intelligente Flyback-Heizung
PCT/EP2006/003017 WO2006111263A1 (fr) 2005-04-22 2006-04-03 Chauffage intelligent par convertisseur a transfert indirect

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP09159438A Division-Into EP2111085B1 (fr) 2005-04-22 2006-04-03 Chauffage intelligent par convertisseur à transfert indirect
EP09159438A Division EP2111085B1 (fr) 2005-04-22 2006-04-03 Chauffage intelligent par convertisseur à transfert indirect

Publications (3)

Publication Number Publication Date
EP1872630A1 true EP1872630A1 (fr) 2008-01-02
EP1872630B1 EP1872630B1 (fr) 2009-06-17
EP1872630B2 EP1872630B2 (fr) 2018-04-11

Family

ID=36329195

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09159438A Not-in-force EP2111085B1 (fr) 2005-04-22 2006-04-03 Chauffage intelligent par convertisseur à transfert indirect
EP06723975.6A Not-in-force EP1872630B2 (fr) 2005-04-22 2006-04-03 Chauffage intelligent par convertisseur a transfert indirect

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP09159438A Not-in-force EP2111085B1 (fr) 2005-04-22 2006-04-03 Chauffage intelligent par convertisseur à transfert indirect

Country Status (5)

Country Link
EP (2) EP2111085B1 (fr)
CN (1) CN101164386A (fr)
AT (1) ATE434372T1 (fr)
DE (2) DE102005018761A1 (fr)
WO (1) WO2006111263A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007016322A1 (de) 2007-04-04 2008-10-09 Tridonicatco Gmbh & Co. Kg Schaltung zur Wendelheizung
DE102008012454A1 (de) * 2008-03-04 2009-09-10 Tridonicatco Gmbh & Co. Kg Verfahren zum Bestimmen von Betriebsparametern einer mit einem elektronischen Vorschaltgerät zu betreibenden Gasentladungslampe sowie ein entsprechendes Vorschaltgerät
DE102007047142A1 (de) * 2007-10-02 2009-04-09 Tridonicatco Gmbh & Co. Kg Verfahren zum Erkennen des Typs einer mit einem elektronischen Vorschaltgerät zu betreibenden Gasentladungslampe sowie elektronisches Vorschaltgerät
DE102008012453A1 (de) * 2008-03-04 2009-09-10 Tridonicatco Gmbh & Co. Kg Verfahren zum Prüfen, ob mindestens zwei mit einem elektronischen Vorschaltgerät zu betreibende Gasentladungslampen vom gleichen Typ sind
DE102008022198A1 (de) * 2008-03-04 2009-09-10 Tridonicatco Gmbh & Co. Kg Typerkennung einer mit einem elektronischen Vorschaltgerät zu betreibenden Gasentladungslampe
DE102008012452A1 (de) * 2008-03-04 2009-09-10 Tridonicatco Gmbh & Co. Kg Schaltung zum Beheizen und Überwachen der Heizwendeln mindestens einer mit einem elektronischen Vorschaltgerät betriebenen Gasentladungslampe auf Wendelbruch
WO2009126472A1 (fr) * 2008-04-11 2009-10-15 Osram Sylvania, Inc. Circuit de préchauffage de filament de lampe autonome pour ballast
DE102009021048A1 (de) 2008-06-09 2009-12-10 Tridonicatco Gmbh & Co. Kg Schaltung zum Beheizen wenigstens einer Heizwendel einer Gasentladungslampe, und Beleuchtungssystem
JP5349905B2 (ja) * 2008-10-27 2013-11-20 パナソニック株式会社 放電灯点灯装置、及びこれを用いた車両用前照灯点灯装置
AT12060U1 (de) * 2010-01-28 2011-09-15 Tridonic Gmbh & Co Kg Betriebsgerät für gasentladungslampen
DE102011103409A1 (de) * 2011-06-06 2012-12-06 Tridonic Gmbh & Co. Kg Verfahren zum Heizen einer Wendel eines Leuchtmittels und entsprechende Heizschaltung
DE102011085659A1 (de) 2011-11-03 2013-05-08 Tridonic Gmbh & Co. Kg Getaktete Heizschaltung für Betriebsgeräte für Leuchtmittel
US8981656B2 (en) * 2012-04-03 2015-03-17 General Electric Company Relamping circuit for fluorescent ballasts
DE102012007449B4 (de) * 2012-04-13 2024-02-22 Tridonic Gmbh & Co Kg Verfahren zum Betreiben eines LLC-Resonanzwandlers für ein Leuchtmittel, Wandler und LED-Konverter

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Also Published As

Publication number Publication date
DE102005018761A1 (de) 2006-10-26
EP1872630B2 (fr) 2018-04-11
EP2111085B1 (fr) 2012-05-23
EP2111085A1 (fr) 2009-10-21
CN101164386A (zh) 2008-04-16
DE502006004002D1 (de) 2009-07-30
ATE434372T1 (de) 2009-07-15
WO2006111263A1 (fr) 2006-10-26
EP1872630B1 (fr) 2009-06-17

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