EP1679942A2 - Circuit d'allumage pour une lampe à décharge - Google Patents

Circuit d'allumage pour une lampe à décharge Download PDF

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Publication number
EP1679942A2
EP1679942A2 EP05026662A EP05026662A EP1679942A2 EP 1679942 A2 EP1679942 A2 EP 1679942A2 EP 05026662 A EP05026662 A EP 05026662A EP 05026662 A EP05026662 A EP 05026662A EP 1679942 A2 EP1679942 A2 EP 1679942A2
Authority
EP
European Patent Office
Prior art keywords
lamp
circuit
ignition
voltage
switch means
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
EP05026662A
Other languages
German (de)
English (en)
Other versions
EP1679942B1 (fr
EP1679942A3 (fr
Inventor
Ferdinand Franz Dipl.-Ing. Mertens
Reinhard Schauerte
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.)
Bag Electronics GmbH
Original Assignee
Bag Electronics GmbH
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Filing date
Publication date
Application filed by Bag Electronics GmbH filed Critical Bag Electronics GmbH
Publication of EP1679942A2 publication Critical patent/EP1679942A2/fr
Publication of EP1679942A3 publication Critical patent/EP1679942A3/fr
Application granted granted Critical
Publication of EP1679942B1 publication Critical patent/EP1679942B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/042—Starting switches using semiconductor devices

Definitions

  • the invention relates to an ignition circuit arrangement for igniting a gas discharge lamp having the features of the preamble of claim 1.
  • Gas discharge lamps in particular high-pressure gas discharge lamps, require an ignition voltage when starting, which is far above the supply voltage for maintaining the discharge.
  • ignition voltage pulses during cold starting have an ignition voltage in the range of 1 kV to 5 kV depending on the lamp used. If a gas discharge lamp to be ignited hot, even greater ignition voltages are necessary, they are in the range of a few kV to some 10 kV, depending on the material to be ionized and the power of the lamp.
  • ignitors in particular high-voltage ignitors for high-pressure gas discharge lamps, are often designed as overlay ignition circuits.
  • This usually includes a designed as a pulse transformer ignition transformer whose secondary side is connected to the lamp to be ignited and its primary side with a triggering pulse triggering circuit.
  • Primary and secondary coils of the Zündübertragers are coupled via a Zündschreibtragerkern for transmission and transformation of the ignition pulse.
  • On the primary side of the Zündübertragers an ignition pulse is generated, which is transformed over the Zündübertrager placed on the supply circuit of the lamp becomes.
  • the transmission ratio of the Zündschreibtragers must be designed accordingly.
  • the ignitor is switched off. This is usually done by blocking the switch in the Zündauslösesclien, so that no primary-side ignition pulse generated and thus not a transformed ignition pulse of the supply voltage is superimposed.
  • the object of the invention is to at least reduce the noise occurring in conventional Zündscariasan glovesen when operating an associated discharge lamp.
  • the ignition circuit according to the invention has a Ignition transformer on, the Primary side with a trigger circuit and secondary side for transmitting an ignition pulse is connected to the lamp.
  • an input power source for the Zündauslösescanno comprises and a first switching means in the Zündauslösesconic, wherein a series circuit consisting at least of the input power source for the Zündauslöseschari, a secondary-side coil of the Zündübertragers and the lamp is formed.
  • the ignition circuit arrangement according to the invention is characterized in that this series circuit has a second switching means, which cyclically interrupts the series circuit during the burning operation of the lamp and closes.
  • the invention is based on the knowledge of the inventors that during the burning operation of the lamp at times in which the lamp voltage has a high temporal gradient, ie at times when the lamp voltage passes through the zero point, the lamp as a generator with a high harmonic content for a Circuit acts, which includes at least one series connection of a secondary coil of the Zündübertragers and a capacitive component such as the input power source for the Zündauslöseschari here.
  • the term "series circuit” means the serial arrangement of at least the said components for closing a circuit, in which the lamp acts as a generator. At zero crossing of the lamp voltage, the input power source discharges with a high current spike across the burning lamp.
  • the design of the ignition circuit arrangement according to the invention can be used both for normal-pressure gas discharge lamps and for high-pressure gas discharge lamps which are operated with an ignition circuit of the superimposition type.
  • the ignition circuit arrangement according to the invention can be used in particular for conventional ballasts for the operation of gas discharge lamps.
  • the second switch means opens and closes the series circuit consisting of at least the input power source for the trigger circuit, the secondary side coil of the ignition transformer and the lamp in response to the lamp voltage, i.e. depending on the lamp voltage.
  • the series circuit can be interrupted just to the sides, if the discharge of the input power source via the lamp preferred and would produce the described disturbing noises in the core of the Zündübertragers with high efficiency.
  • the term "in response to the lamp voltage” refers to any operating parameter of the lamp, which goes back to the lamp voltage or its course, for example, the instantaneous lamp voltage or the temporal gradient of the lamp voltage.
  • the second switching means when the second switching means is designed so that it opens the series circuit when the lamp voltage within a predetermined voltage interval is particularly advantageous and the second switch means closes the series circuit again when the lamp voltage is outside the predetermined voltage interval. Due to the typical course of the lamp voltage of a gas discharge lamp, which has an AC supply, the second switching means for the series circuit can be easily controlled, since the lamp voltage in this case has a high harmonic content in the range around zero. If now exactly this area excluded, ie prevents the specified series circuit is closed in this period, the noise can be effectively avoided in the Zündscharisan angel.
  • the input power source for the Zündauslöseschari has at least one capacitor, which is so far charged via the AC supply of the lamp, so that the ignition circuit according to the invention can provide ignition pulses for igniting the gas discharge lamp at any time, if necessary.
  • the second switching means may be arranged in a charging path for the input energy source of the triggering circuit, the charge of the input power source being made via the AC supply to the lamp.
  • the second switch means advantageously serves on the one hand for opening and closing the series circuit and on the other hand for controlling the charge of the input power source for the Zündauslöseschari.
  • the second switching means for opening and closing the series circuit has no external control, but is self-controlled, which reduces the necessary device-side effort is particularly advantageous.
  • a particularly preferred simple design of the second switch means is present when this is formed bipolar, wherein the Switch state is determined solely by the voltage applied to the poles voltage. In this way, the invention does not require the provision of additional control for the second switch means.
  • the switching points of the second switch means are set so that the series circuit is open in the times in which the lamp voltage or the lamp current has a high harmonic content.
  • the second switching means also has a symmetrical to the zero point switching behavior.
  • Such a switching behavior can in particular be provided by a suitably designed bidirectional threshold value switch.
  • a multiplicity of known switches can be used as the second switch means, in particular semiconductor switches.
  • the self-controlled switches are preferred because they do not require external control.
  • so-called "transient suppressor" diodes or DIACS (diode alternating current switch), which are constructed as bidirectional diodes can be used.
  • DIACS diode alternating current switch
  • a known Zündscensan extract the overlay type for a gas discharge lamp is indicated, which is supplied via an AC supply of electrical energy.
  • At the terminals BN is provided by a conventional ballast AC voltage U N on.
  • the lamp 10 is connected to the output of the ignition circuit.
  • This comprises an ignition transformer 20 whose secondary-side coil 21 is arranged in the supply circuit of the lamp 10.
  • the shock capacitor 30, a further capacitor 60 is connected in series, which is itself a resistor 70 connected in parallel.
  • a core 23 is used for coupling primary coil 22 and secondary coil 21 of the ignition transformer 20 a core 23 is used.
  • the lamp 10 must be started by generating high voltage firing pulses. Initially, therefore, no lamp current I L and the surge capacitor 30 flows through the capacitor 60 and the Resistor R 1 loaded, the switch 40 is open. After charging the capacitor C 1 , closing the switch 40 closes the series circuit formed by the components 30, 22, 50 and 40, thereby discharging the capacitor 30 acting as the input power source for the trigger circuit. A primary-side ignition pulse is produced, which is transformed by means of the ignition transformer 20 into a secondary-side high-voltage pulse.
  • the magnetization of the primary-side coil winding of the coil 22 is transformed via the Zündübertragerkern 23 to the secondary-side coil winding 21 with the transmission ratio of the Zündübertragers and superimposed on the mains voltage.
  • the air coil 50 serves as a current limiter for the switch 40.
  • the capacitor 60 counteracts a short circuit of the AC supply when the surge capacitor 30 is discharged, in which the voltage in the capacitor 60 increases during the discharge of C1 ,
  • the discharged surge capacitor 30 in turn is charged via the resistor 70 when the surge capacitor feeds the firing circuit.
  • the resistor 80 shown in the circuit serves to provide additional current limiting in the AC supply.
  • the switch 40 is actuated to initiate the ignition pulse (s) at times when the AC supply is capable of keeping the lamp from burning.
  • the ignition circuit may also be configured to generate a sequence of primary or secondary ignition pulses.
  • FIG. 2a A typical course of the lamp voltage with an alternating current supply with the voltage U N between the poles BN is shown in Fig. 2a.
  • the lamp voltage has a high temporal gradient in the region of the zero crossings, while the voltage subsequently changes into a substantially constant region.
  • 2b shows the lamp current caused by the illustrated lamp voltage U L , which has peaks in the region of the zero crossings, which are responsible for the described noise problems (buzzing) of the ignition transformer. It should be noted that the current peaks shown can be resolved at a higher temporal resolution into a high-frequency oscillation.
  • FIG. 1 The design of an exemplary ignition circuit arrangement according to the invention is indicated in FIG. This differs from the conventional one shown in FIG. 3 only in that a "transient suppressor" diode is arranged between the surge capacitor 30 and the limiting capacitor 60.
  • This diode 100 operates symmetrically to the voltage at the two input terminals such that the diode is up to a voltage of a predetermined value, in the example given by 62 volts, very high impedance.
  • no current flows through the capacitors, so that at times of high resistance of the diode 100 of the series circuit comprising the electrical components 21, 30, 100, 60, 80 and 10 is interrupted.
  • the capacitors C1 and C2 can no longer discharge abruptly via the secondary side of the ignition transformer and the lamp.
  • no vibration can build up, which would otherwise lead to disturbing noises in the Zündübertragerkern in the audible frequency range.
  • Fig. 2c shows the switching behavior S T of the diode 100.
  • the diode blocks in a time interval T, in which the lamp voltage passes through the zero point and has a high harmonic content; outside the time interval T, the diode is low-resistance. In that sense, the occurrence can be effective the increased current peaks are avoided, which ultimately allows the provision of a substantially noiseless igniter.
  • FIG. 2d shows the time profile of the lamp current for the switching behavior of the diode 100 shown in FIG. 2c. As can be seen, the typical current peaks shown in FIG. 2b are completely avoided in a conventional ignitor.
  • the switching behavior of the second switching means i. the switching interval, is particularly adapted to the electronic characteristics of the lamp of the Zündübertragers and / or the input power source for the Zündauslöseschari.
  • the diode 100 is designed as a balanced bidirectional threshold switch with a switching voltage of 62V.
  • a switching voltage of 62V For other electrical components, another, adapted to the respective electrical components switching voltage is appropriate.
  • the switch control can also be set asymmetrically around the zero point of the lamp voltage.
  • the switching means for interrupting the specified series circuit may be arranged at different locations within the series circuit; it must only be ensured that the AC power supply of the lamp is not interrupted by the switch.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
EP20050026662 2005-01-07 2005-12-07 Circuit d'allumage pour une lampe à décharge Not-in-force EP1679942B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200520000213 DE202005000213U1 (de) 2005-01-07 2005-01-07 Zündgerät

Publications (3)

Publication Number Publication Date
EP1679942A2 true EP1679942A2 (fr) 2006-07-12
EP1679942A3 EP1679942A3 (fr) 2006-08-09
EP1679942B1 EP1679942B1 (fr) 2013-06-19

Family

ID=36061486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050026662 Not-in-force EP1679942B1 (fr) 2005-01-07 2005-12-07 Circuit d'allumage pour une lampe à décharge

Country Status (2)

Country Link
EP (1) EP1679942B1 (fr)
DE (1) DE202005000213U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007028467A1 (fr) * 2005-09-02 2007-03-15 Tridonicatco Gmbh & Co. Kg Circuit d'amorçage a element d'attenuation hf

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4745341A (en) 1986-03-25 1988-05-17 Cooper Industries Rapid restrike starter for high intensity discharge lamps

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3903149A1 (de) * 1989-02-02 1990-08-09 Zumtobel Ag Zuendschaltung fuer eine ueber eine drosselspule an der wechselspannungsquelle angeschlossene hochdruckmetalldampf-entladungslampe
DE29806901U1 (de) * 1997-06-06 1998-10-08 Tridonic Bauelemente Ges.M.B.H., Dornbirn Zündschaltung für Hochdruck-Gasentladungslampen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4745341A (en) 1986-03-25 1988-05-17 Cooper Industries Rapid restrike starter for high intensity discharge lamps

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007028467A1 (fr) * 2005-09-02 2007-03-15 Tridonicatco Gmbh & Co. Kg Circuit d'amorçage a element d'attenuation hf

Also Published As

Publication number Publication date
EP1679942B1 (fr) 2013-06-19
DE202005000213U1 (de) 2006-05-18
EP1679942A3 (fr) 2006-08-09

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