EP0078790A2 - Dispositif de circuit pour l'ignition électronique de lampes à décharge de gaz - Google Patents

Dispositif de circuit pour l'ignition électronique de lampes à décharge de gaz Download PDF

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Publication number
EP0078790A2
EP0078790A2 EP82890159A EP82890159A EP0078790A2 EP 0078790 A2 EP0078790 A2 EP 0078790A2 EP 82890159 A EP82890159 A EP 82890159A EP 82890159 A EP82890159 A EP 82890159A EP 0078790 A2 EP0078790 A2 EP 0078790A2
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EP
European Patent Office
Prior art keywords
gate
outputs
input
circuit arrangement
gate combination
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.)
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Application number
EP82890159A
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German (de)
English (en)
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EP0078790A3 (fr
Inventor
Franz Wittmann
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Individual
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Individual
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Publication date
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Publication of EP0078790A2 publication Critical patent/EP0078790A2/fr
Publication of EP0078790A3 publication Critical patent/EP0078790A3/fr
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    • 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
    • H05B41/044—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes
    • H05B41/046—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes using controlled semiconductor devices

Definitions

  • the invention relates to a circuit arrangement for the electronic ignition of gas discharge lamps, in particular fluorescent tubes, with a diode bridge at the input, a power semiconductor which can be switched on and off via a control electrode in the heating circuit of the discharge lamp, a phase-shifting arrangement for determining the ignition timing and a device for determining the duration of the Electrode heating.
  • a circuit arrangement of the type described above is described for example in AT-PS 350 664.
  • the circuit arrangement is characterized in that a connected to the base of a transistor control circuit is provided which includes a branch which the lamp is switched on at least during the last part of the ignition process, and such a small time constant has the advantage that eriode p during one half of the alternating voltage source of Transistor connected through and blocked several times.
  • a disadvantage of the known arrangement is the high switching frequency which it generates in order to bring about the ignition of the discharge lamp within half a period of the AC voltage. The impulses of the switching frequency are in fact extremely sharp, so that it can easily lead to a malfunction of communications equipment.
  • Other known electronic starter circuits additionally require chokes and / or transformers which undesirably increase the volume of the circuit arrangement.
  • the invention has set itself the goal of creating a circuit arrangement for the electronic ignition of gas discharge lamps, in particular for fluorescent tubes, which takes up little space and does not generate any disruptive voltage peaks at high frequency when the lighting fixture is switched on.
  • the invention solves this problem in that it has a digital counter which can be controlled via a first gate combination, from which an input to a tap between two series-connected zener diodes, which form a series circuit with a resistor, which is located between the reference line and a pole at the input provided diode bridge, a second input is connected to the phase-shifting arrangement via a transistor in emitter follow-up circuit, and further inputs of the first Gate combination are connected to outputs of a second gate combination, the inputs of which are each connected to a group of the outputs of the digital counter combined in two groups, and an output from the second gate combination, which also leads to an input of the first gate combination, directly or indirectly with the control electrode of the power semiconductor is connected, and that the reset input of the digital counter is at the tap of a
  • An advantageous gate combination consists, for example, of two AND gates and an OR gate connected to the outputs of these gates for the first gate combination and an OR gate and a NAND gate for the second gate combination.
  • the first combination of gates from two NAND gates and a further NAND gate, in which case the second combination of gates is composed of a NAND gate and an OR gate.
  • phase-shifting arrangement from the hot end of a resistor which is connected from the negative pole of the diode bridge to ground.
  • the voltage profile across this resistor corresponds to that of an exact full-wave rectification, ie there are half-periods of the mains AC voltage strung together, which are fed via the phase-shifting arrangement to a transistor in an emitter circuit, which acts as a current amplifier.
  • Fig. 1 the input terminals of the circuit arrangement according to the invention are designated 1 and 2. With these two connections, the arrangement is in the heating circuit of a gas discharge lamp or tube and replaces the usual glow starter or the like there.
  • the connections 1, -2 are connected to a diode bridge (bridge rectifier circuit) with the diodes 3, 4, 5 and 6.
  • the positive pole of the diode bridge is connected to an electrode of the controllable power semiconductor 32, the negative pole is connected to the reference line (ground line) via a resistor 7. connected.
  • a circuit also leads from the positive pole of the diode bridge via a high-resistance resistor 7 and two Zener diodes 9 and 10 in series connection to the reference line.
  • the breakdown voltage of the first Zener diode 9 is above the peak voltage occurring on the lamp during operation, the breakdown voltage of the second Zener diode 10 corresponds to the operating voltage for the control circuit.
  • the power supply for the control circuit when the power semiconductor is not switched on takes place via the resistor 11, which is connected in series with the Zener diode 14, which keeps the supply voltage approximately constant.
  • this Zener diode 14 has a resistor 13 in parallel, which takes over part of the load.
  • a diode 12 is connected to the zener diode 14 and leads to the smoothing capacitor 15.
  • the actual control part consists of a digital counter 24, before its input an OR gate (with a negative clock edge of the counter 24 is a NOR gate) 23, the inputs of which are controlled by two AND gates 21, 22.
  • the reset input of the digital counter 24 is located at the tapping point of a voltage divider formed from a capacitor 25 and a resistor 26, which is connected in parallel to the capacitor 15 used to smooth the operating voltage. The purpose of this arrangement is to reset the counter to 0 when the gas discharge lamp is switched on in order to have a defined starting point.
  • Three outputs of the counter 24 are at the inputs of a NAND gate 27, six outputs at the inputs of an OR gate 28.
  • the output of this gate is connected on the one hand to an input of an AND gate 21 provided in front of the counter input, and on the other hand to an input of an led further AND gate 29, the output of which is connected to an electrode of the controllable power semiconductor 32 via a capacitor 30.
  • the second input of this AND gate 29 is connected to the cathode of the Zener diode 14 which stabilizes the operating voltage.
  • the output of the NAND gate 27, which is connected to three outputs of the counter 24, is connected to one input each of the two AND gates 21, 22 provided in front of the counter input.
  • the now flowing load current causes a voltage drop across the series resistor 7, the time course of which corresponds exactly to the course of the sine half-waves from the diode bridge.
  • the voltage occurring at the hot end of the resistor 7 is supplied to the base of a transistor 17 via a resistor 20 and a capacitor 19. Since the half-waves of the alternating voltage occurring at the resistor 7 are negatively directed, a current flow occurs across the resistor 20 and the capacitor 19 when the voltage drops below zero and the base of the transistor 17 switches this through, which leads to a voltage jump across the resistor 18 in the emitter circuit of the transistor 17.
  • the point in time of the voltage jump is set by means of the phase-shifting arrangement, consisting of the capacitor 19 and the resistor 20, in such a way that it takes place as precisely as possible at the apex of a half-wave.
  • the ballast choke results in the greatest possible induction voltage pulse with which the lamp or tube can be ignited safely. There If this voltage pulse also affects the circuit, via the resistor 8 and the two Zener diodes 9 and 10, the AND gate 22 and the following OR gate 23 also receive a clock pulse which clocks the counter 24 by one position. It is therefore necessary that at least the first output of the counter 24 is not included in the logic of the OR gate 28.
  • a transistor for example a V-MOS field-effect power transistor, was used as the controllable semiconductor set.
  • a thyristor that can be switched off via the gate (known under the abbreviation GTO) is assumed as the power semiconductor.
  • the gate of such a thyristor 34 is driven directly by the ODFR gate 28 via a resistor 33.
  • a further Zener diode 36 and a diode 35 are required, by means of which diodes the voltage supply of the control circuit is ensured via the resistor 11 when the thyristor 34 is not switched through.
  • the cathode of the thyristor 34 is connected to the negative potential via the resistor 13.
  • the gate of the thyristor 34 receives a positive trigger voltage via the resistor 33, which is present during the entire preheating time (DC triggering). Since the resistor 13 and the zener diode 14 are in the load circuit when the thyristor 34 is switched on, the cathode of the thyristor 34 is at the positive supply voltage, which is equal to the breakdown voltage of the zener diode 14.
  • FIG. 4 shows a further variant in which a counter 40 supplies its inputs with inverted outputs.
  • a NAND gate 42 is set instead of the OR gate 28 and an OR gate 42 is set instead of the NAND gate 27, so that the control sequence is again the same as in the circuit arrangement according to FIG. 1.
  • the sequence of an ignition cycle is precisely defined in time and is independent of external influences, such as, for. B. the ambient temperature, which must be taken into account in analog circuits, and which there leads to considerable scatter values of the preheating and ignition cycle.
  • the only analog elements used in the invention are transistor 17, capacitor 19 and resistor 20, the tolerance of which is not critical, however.
  • a major advantage of the invention is to be seen in the fact that, at the most favorable time in the course of the alternating voltage, the greatest possible voltage pulse for igniting the gas discharge lamp or tube is available, so that practically the first attempt is made. This is advantageous in that often starting a gas discharge lamp or tube reduces its life.
  • C-Mos modules are advantageously used which are less sensitive to possible fluctuations in the operating voltage than the corresponding TTL circuits and also consume less current than these.
  • it can prove economical to produce so-called customer-specific ICs in larger quantities, in which all digital switching elements and counters are contained in one piece.

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  • Circuit Arrangements For Discharge Lamps (AREA)
EP82890159A 1981-11-02 1982-11-02 Dispositif de circuit pour l'ignition électronique de lampes à décharge de gaz Withdrawn EP0078790A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT466581 1981-11-02
AT4665/81 1981-11-02

Publications (2)

Publication Number Publication Date
EP0078790A2 true EP0078790A2 (fr) 1983-05-11
EP0078790A3 EP0078790A3 (fr) 1983-09-21

Family

ID=3566832

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82890159A Withdrawn EP0078790A3 (fr) 1981-11-02 1982-11-02 Dispositif de circuit pour l'ignition électronique de lampes à décharge de gaz

Country Status (1)

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EP (1) EP0078790A3 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0470453A1 (fr) * 1990-08-10 1992-02-12 Knobel Ag Lichttechnische Komponenten Starter électronique avec circuit de répétition
DE4119775A1 (de) * 1991-06-15 1992-12-17 Vossloh Schwabe Gmbh Vorschaltgeraet mit gesteuerter heizzeit
DE4216716C1 (de) * 1992-05-20 1993-10-14 Siemens Ag Schaltungsanordnung zum Starten einer vorheizbaren Entladungslampe
DE4329228A1 (de) * 1993-08-25 1995-03-02 Elpro Ag Verfahren und Schaltungsanordnung zum elektronischen Zünden von Leuchtstofflampen
WO1995035646A1 (fr) * 1994-06-22 1995-12-28 Physiomed-Medizintechnik Gmbh Commande de tubes fluorescents
EP0710052A1 (fr) * 1994-10-28 1996-05-01 STMicroelectronics S.A. Starter électronique pour lampe fluorescente
WO1996022006A1 (fr) * 1993-07-08 1996-07-18 Agentur Dröge Gmbh Circuit d'amorçage pour lampes a decharge
FR2771588A1 (fr) * 1997-11-21 1999-05-28 Sgs Thomson Microelectronics Circuit de commande de tube fluorescent
WO2003055280A1 (fr) * 2001-12-19 2003-07-03 Northrop Grumman Procede et appareil de variation des lampes fluorescentes haute intensite

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH577779A5 (fr) * 1974-10-23 1976-07-15 Bbc Brown Boveri & Cie
AT350664B (de) * 1972-05-09 1979-06-11 Philips Nv Vorrichtung zur zuendung und speisung einer entladungslampe
US4274045A (en) * 1979-04-09 1981-06-16 Richard Goldstein Power supply and control circuit for series connected controller

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT350664B (de) * 1972-05-09 1979-06-11 Philips Nv Vorrichtung zur zuendung und speisung einer entladungslampe
CH577779A5 (fr) * 1974-10-23 1976-07-15 Bbc Brown Boveri & Cie
US4274045A (en) * 1979-04-09 1981-06-16 Richard Goldstein Power supply and control circuit for series connected controller

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH680968A5 (fr) * 1990-08-10 1992-12-15 Knobel Elektro App
EP0470453A1 (fr) * 1990-08-10 1992-02-12 Knobel Ag Lichttechnische Komponenten Starter électronique avec circuit de répétition
DE4119775A1 (de) * 1991-06-15 1992-12-17 Vossloh Schwabe Gmbh Vorschaltgeraet mit gesteuerter heizzeit
DE4216716C1 (de) * 1992-05-20 1993-10-14 Siemens Ag Schaltungsanordnung zum Starten einer vorheizbaren Entladungslampe
WO1996022006A1 (fr) * 1993-07-08 1996-07-18 Agentur Dröge Gmbh Circuit d'amorçage pour lampes a decharge
DE4329228A1 (de) * 1993-08-25 1995-03-02 Elpro Ag Verfahren und Schaltungsanordnung zum elektronischen Zünden von Leuchtstofflampen
WO1995035646A1 (fr) * 1994-06-22 1995-12-28 Physiomed-Medizintechnik Gmbh Commande de tubes fluorescents
US5811940A (en) * 1994-06-22 1998-09-22 Physiomed-Medizintechnik Gmbh Phase-shift lamp control
EP0710052A1 (fr) * 1994-10-28 1996-05-01 STMicroelectronics S.A. Starter électronique pour lampe fluorescente
US5616992A (en) * 1994-10-28 1997-04-01 Sgs-Thomson Microelectronics S.A. Electronic starter circuit for fluorescent lamp
FR2726426A1 (fr) * 1994-10-28 1996-05-03 Sgs Thomson Microelectronics Starter electronique pour lampe fluorescente
FR2771588A1 (fr) * 1997-11-21 1999-05-28 Sgs Thomson Microelectronics Circuit de commande de tube fluorescent
WO2003055280A1 (fr) * 2001-12-19 2003-07-03 Northrop Grumman Procede et appareil de variation des lampes fluorescentes haute intensite

Also Published As

Publication number Publication date
EP0078790A3 (fr) 1983-09-21

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