EP0276460A1 - Disposition de circuit pour mettre en oeuvre une lampe à décharge basse pression - Google Patents

Disposition de circuit pour mettre en oeuvre une lampe à décharge basse pression Download PDF

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Publication number
EP0276460A1
EP0276460A1 EP87118963A EP87118963A EP0276460A1 EP 0276460 A1 EP0276460 A1 EP 0276460A1 EP 87118963 A EP87118963 A EP 87118963A EP 87118963 A EP87118963 A EP 87118963A EP 0276460 A1 EP0276460 A1 EP 0276460A1
Authority
EP
European Patent Office
Prior art keywords
thyristor
capacitor
circuit
connects
smoothing capacitor
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
EP87118963A
Other languages
German (de)
English (en)
Other versions
EP0276460B1 (fr
Inventor
Hans-Jürgen Fähnrich
Anton Zuchtriegel
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
Priority to AT87118963T priority Critical patent/ATE68657T1/de
Publication of EP0276460A1 publication Critical patent/EP0276460A1/fr
Application granted granted Critical
Publication of EP0276460B1 publication Critical patent/EP0276460B1/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
    • 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
    • H05B41/282—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
    • H05B41/2855—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions

Definitions

  • the invention relates to a circuit arrangement for high-frequency operation of a low-pressure discharge lamp in accordance with the preamble of claim 1.
  • a shutdown device is known from DE-OS 29 41 822, as it is listed in the preamble of the first claim.
  • This switch-off device contains a trigger circuit with a precisely dimensioned diac, which switches the thyristor off with a delay of approximately one second.
  • a delay time of up to one second is too long for a circuit arrangement with a harmonic filter designed as a pump system, since a voltage rise at the smoothing capacitor can already occur in much shorter times.
  • the trigger circuit should also be able to be created from as few and inexpensive components as possible.
  • the capacitors of the active harmonic filter on the smoothing capacitor cause a voltage rise. If the voltage rise exceeds the breakdown voltage of the one or more Zener diodes of the trigger circuit connected in series, these diodes switch through and thus trigger the switch-off thyristor directly. This then also changes into a conductive state and thus withdraws the control power from the transistor connected to the positive pole of the line rectifier. The transistor is blocked and the oscillation of the push-pull frequency generator ends. The thyristor is protected and its switching accuracy is ensured by connecting the gate of the thyristor via a resistor to the cathode of the thyristor.
  • the circuit arrangement can be used to operate one, a plurality of low-pressure discharge lamps connected in parallel or also a number of series-connected low-pressure discharge lamps.
  • the block diagram in FIG. 1 shows the basic structure of a circuit arrangement according to the invention for a low-pressure discharge lamp.
  • the circuit arrangement includes a high-frequency filter 1, a line rectifier 2 and a push-pull frequency generator with a control circuit 3, the switching transistors of which bridge the DC output of the line rectifier 2.
  • the low-pressure discharge lamp LP1 is connected between the center tap M1 of the switching transistors and the positive pole of the mains rectifier 2 via a series resonant circuit 4.
  • an active harmonic filter 5 is provided, which is connected on the one hand to the positive pole of the mains rectifier 2 and on the other hand to the center tap M1.
  • the circuit arrangement has a shutdown device.
  • the latter consists of a series connection of a diode D12, a resistor R7 and a thyristor TH and a resistor R8.
  • the series connection connects the base of the transistor T1 to the negative pole of the mains rectifier, while the resistor R8 is connected between the center tap M5 between the diode D12 and the resistor R7 and the positive pole of the smoothing capacitor C4.
  • the gate of the thyristor TH is via two Zener diodes DZ1, DZ2 with the positive pole of the smoothing capacitor C4 and via one Resistor R9 connected to the cathode of thyristor TH.
  • FIG. 2 shows the exact circuit diagram of a circuit arrangement with a switch-off device according to the invention for operating a low-pressure discharge lamp.
  • a block of a current-compensated filter choke FD and a filter capacitor C1 are connected in parallel to the input of the mains rectifier in each supply line. This high-frequency filter is followed by the line rectifier with diodes D1 to D4 and a backup capacitor C2 parallel to the DC output.
  • the self-regulating push-pull frequency generator consists of the two transistors T1, T2 with the same polarity and the reverse current diodes D6, D7, the series resistors R2 to R5, the control transformer and the starting generator with the resistors R1, R6, the starting capacitor C3, the diode D5 and the diac DC.
  • the control transformer works on the feedback principle and consists of the primary winding RK1.1 and the two secondary windings RK1.2 and RK1.3.
  • the lamp LP1 is connected with a connection of the electrode E1 to the center tap M1 between the two transistors T1, T2 and with a connection of the other electrode E2 to the positive pole of the mains rectifier.
  • a series resonance circuit comprising resonance inductance L1, coupling capacitor C5 and resonance capacitor C6 is provided, the resonance inductance L1 and the coupling capacitor C5 between the primary winding RK1.1 of the control transformer and the corresponding connection of the electrode E1 and the resonance capacitor C6 between the connections on the heating circuit side Electrodes E1 and E2 are connected.
  • a smoothing capacitor C4 In addition to the switching paths of the transistors T1, T2 there is a smoothing capacitor C4.
  • the circuit arrangement also has an active harmonic filter.
  • the filter consists of two diodes D8, D9 connected in series and in the forward DC direction to the supporting capacitor C2, the center tap M2 between the two diodes D8, D9 via a capacitor C7 with the center tap M1 between the two transistors T1, T2 and a capacitor C8 is connected to the center tap M3 between the resonance inductor L1 and the coupling capacitor C5.
  • the harmonic filter also contains two further diodes D10, D11 connected in series and in a forward DC direction, the center tap M4 between these two diodes D10, D11 via a capacitor C9 also with the center tap M1 between the two transistors T1, T2 is connected.
  • cycle 1 follows again and the energy transport begins again.
  • Per period of HF operating frequency is thus once pumped energy into the smoothing capacitor C4.
  • the pump capacitors C7, C8, C9 are charged to the peak value of the mains voltage, then the voltage and thus the energy drop again.
  • Energy is pumped into the smoothing capacitor C4 during the mains voltage half-wave in accordance with the instantaneous value of the pulsating DC voltage at the supporting capacitor C2, reduced by the energy stored in the resonance inductance L1.
  • the harmonic filter ensures a sinusoidal mains current consumption and a linear dependence of the lamp power on the mains voltage.
  • the circuit arrangement therefore additionally has a switch-off device with trigger control.
  • This consists of a series connection of a diode D12, a resistor R7 and a thyristor TH, which connects the base of the transistor T1 to the negative pole of the mains rectifier.
  • the center tap is M5 between the diode D12 and the resistor R7 is connected via a resistor R8 to the positive pole of the smoothing capacitor C4.
  • the trigger control consists of the two Zener diodes DZ1, DZ2, which connect the gate of the thyristor TH to the positive pole of the smoothing capacitor C4, and of the resistor R9, which connects the gate of the thyristor TH to its cathode.
  • the two Zener diodes DZ1 and DZ2 conduct with the same total breakdown voltage and thus trigger the turn-off thyristor TH.
  • This removes the control energy from the base of the transistor T1 by dissipation to the negative pole of the mains rectifier; the transistor is blocked and the resonance circuit is de-energized on inductance L1, capacitor C6 and capacitor C5.
  • the thyristor TH is kept in the conductive state, so that any renewed use of vibrations is prevented.
  • the diode D12 blocks the AC voltage from the anode circuit of the thyristor TH. Only after switching off the power supply does the thyristor TH lock and the push-pull frequency generator can start again after switching on the power supply again.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
EP87118963A 1987-01-08 1987-12-21 Disposition de circuit pour mettre en oeuvre une lampe à décharge basse pression Expired - Lifetime EP0276460B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87118963T ATE68657T1 (de) 1987-01-08 1987-12-21 Schaltungsanordnung zum betrieb einer niederdruckentladungslampe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873700421 DE3700421A1 (de) 1987-01-08 1987-01-08 Schaltungsanordnung zum betrieb einer niederdruckentladungslampe
DE3700421 1987-01-08

Publications (2)

Publication Number Publication Date
EP0276460A1 true EP0276460A1 (fr) 1988-08-03
EP0276460B1 EP0276460B1 (fr) 1991-10-16

Family

ID=6318580

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87118963A Expired - Lifetime EP0276460B1 (fr) 1987-01-08 1987-12-21 Disposition de circuit pour mettre en oeuvre une lampe à décharge basse pression

Country Status (3)

Country Link
EP (1) EP0276460B1 (fr)
AT (1) ATE68657T1 (fr)
DE (2) DE3700421A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0330118A2 (fr) * 1988-02-22 1989-08-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Circuit pour alimenter une lampe à décharge à basse pression
EP0693864A2 (fr) 1994-07-21 1996-01-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Circuit pour alimenter une ou plusieurs lampes à décharge basse-pression
EP0753987A1 (fr) * 1995-07-12 1997-01-15 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Circuit et procédé d'opération de lampes électriques
DE19820615A1 (de) * 1998-05-08 1999-11-11 Walter Holzer Verfahren und Vorrichtung zur Regelung von Energiesparlampen
EP1765042A2 (fr) 2005-06-20 2007-03-21 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Circuit d'arret pour l'onduleur d'un ballast électronique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN171097B (fr) * 1989-03-16 1992-07-18 Holec Syst & Componenten
DE4334076A1 (de) * 1993-10-06 1995-06-08 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Betrieb elektrischer Lampen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4330736A (en) * 1979-04-02 1982-05-18 Iota Engineering, Inc. Compensated current feedback oscillator ballast for fluorescent lamps and the like

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4330736A (en) * 1979-04-02 1982-05-18 Iota Engineering, Inc. Compensated current feedback oscillator ballast for fluorescent lamps and the like

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0330118A2 (fr) * 1988-02-22 1989-08-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Circuit pour alimenter une lampe à décharge à basse pression
EP0330118A3 (fr) * 1988-02-22 1991-02-27 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Circuit pour alimenter une lampe à décharge à basse pression
EP0693864A2 (fr) 1994-07-21 1996-01-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Circuit pour alimenter une ou plusieurs lampes à décharge basse-pression
US5589740A (en) * 1994-07-21 1996-12-31 Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen Mbh Semiconductor-controlled operating circuit for one or more low-pressure discharge lamps, typically fluorescent lamps
EP0753987A1 (fr) * 1995-07-12 1997-01-15 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Circuit et procédé d'opération de lampes électriques
US5783911A (en) * 1995-07-12 1998-07-21 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Circuit arrangement for operating electric lamps, and operating method for electric lamps
DE19820615A1 (de) * 1998-05-08 1999-11-11 Walter Holzer Verfahren und Vorrichtung zur Regelung von Energiesparlampen
EP1765042A2 (fr) 2005-06-20 2007-03-21 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Circuit d'arret pour l'onduleur d'un ballast électronique
EP1765042A3 (fr) * 2005-06-20 2008-02-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Circuit d'arret pour l'onduleur d'un ballast électronique
CN1893758B (zh) * 2005-06-20 2011-04-20 电灯专利信托有限公司 关闭电路

Also Published As

Publication number Publication date
DE3700421A1 (de) 1988-07-21
EP0276460B1 (fr) 1991-10-16
ATE68657T1 (de) 1991-11-15
DE3773891D1 (de) 1991-11-21

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