EP0111296B1 - Dispositif pour contrôler l'intensité d'une lampe de décharge à basse pression - Google Patents

Dispositif pour contrôler l'intensité d'une lampe de décharge à basse pression Download PDF

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Publication number
EP0111296B1
EP0111296B1 EP83112266A EP83112266A EP0111296B1 EP 0111296 B1 EP0111296 B1 EP 0111296B1 EP 83112266 A EP83112266 A EP 83112266A EP 83112266 A EP83112266 A EP 83112266A EP 0111296 B1 EP0111296 B1 EP 0111296B1
Authority
EP
European Patent Office
Prior art keywords
arrangement
secondary winding
discharge lamp
heating circuit
auxiliary voltage
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.)
Expired
Application number
EP83112266A
Other languages
German (de)
English (en)
Other versions
EP0111296A1 (fr
Inventor
Josef Ballmann
Manfred Klamt
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.)
Siemens AG
Original Assignee
Siemens AG
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
Priority claimed from DE19823245817 external-priority patent/DE3245817A1/de
Priority claimed from DE19833328378 external-priority patent/DE3328378A1/de
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT83112266T priority Critical patent/ATE29361T1/de
Publication of EP0111296A1 publication Critical patent/EP0111296A1/fr
Application granted granted Critical
Publication of EP0111296B1 publication Critical patent/EP0111296B1/fr
Expired 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
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations

Definitions

  • the invention relates to an arrangement for controlling the brightness of a low-pressure discharge lamp according to the preamble of claim 1.
  • the voltage supplied by the control device is usually changed by phase gating.
  • additional ignition aids such as a high-voltage ignition strip or a metal net along the surface of the lamp, were used.
  • the brightness of these lamps should not be controllable in the manner described.
  • the invention is therefore based on the object of specifying an arrangement for controlling the brightness of low-pressure discharge lamps which can also be used for lamps with a diameter of 26 mm.
  • the inventive solution to this problem is characterized in claim 1. It is based on the fact that the auxiliary voltage with a frequency of greater than 5 kHz maintains a basic ionization, which enables stable operation of the lamp even with largely reduced brightness.
  • any relevant generator with sufficient power can be used as an auxiliary voltage source; the operating voltage required for it is, according to a development of the invention, supplied by the heating transformer, which is required in any case for operating the discharge lamp. For this purpose, this can have a separate secondary winding; However, it is particularly advantageous to tap the supply voltage for the auxiliary voltage source from a secondary winding which feeds the lamp electrodes.
  • the power supply of the auxiliary voltage source via the heating transformer enables the auxiliary voltage source to be combined with the heating transformer to form a pre-wired additional device which, apart from the mains connection terminals, only has the terminals for connecting the heatable electrodes of the lamp!
  • This additional device thus differs in terms of the external appearance in a small way from the heating transformer previously used.
  • the width of the additional device is expediently the same or smaller and its type of fastening is unchanged, so that retrofitting of existing systems is simply possible by simply exchanging the heating transformer for the new additional device.
  • the auxiliary voltage source is preferably arranged on the end face, that is to say in the longitudinal direction of the heating transformer, since there is generally sufficient space in this dimension in the luminaire chassis.
  • the heating transformers when retrofitting an existing system and only to additionally install the auxiliary voltage source and to connect them to the terminals of the heating transformer; it is particularly advantageous here if the auxiliary voltage source is designed as a three-pole system, so that only three connections to the heating transformer are to be made.
  • the fluorescent lamp connected to such an arrangement is removed from the socket by a person such that only the heating circuit on the ground side is interrupted and this person then touches one of the exposed electrode connections, then the auxiliary current can flow through this person to earth and thereby the Ionize the lamp to such an extent that a dangerous main current can subsequently be discharged via the person to earth.
  • a monitoring device is provided according to a further development of the invention, by means of which the auxiliary voltage is switched off when the heating circuit on the earth side is interrupted.
  • an auxiliary contact can be arranged in this socket or in its vicinity in the lamp housing, the position of which changes when the lamp is removed from the socket and which thereby switches off the auxiliary voltage directly or indirectly.
  • the current in the earth-side heating circuit is preferably monitored and the auxiliary voltage source is switched off when this current is lost.
  • an additional device 6 with a heating transformer 4 is provided, the primary winding 41 of which is connected to the AC voltage network via the terminals 61, 62.
  • a first secondary winding 43 of this heating transformer is connected to the electrode 11 of the lamp 1 via the terminals 63, 64; a second Secondary winding 42 feeds the second electrode 12 via the terminals 62, 65.
  • the additional device 6 contains, in addition to the heating transformer 4, an auxiliary voltage source 5, which is connected to the secondary winding 42 via terminals 500, 510 and to the terminal 63 of the additional device via terminal 520. It thus receives a supply voltage from the secondary winding 42 via the terminals 500, 510 and supplies an auxiliary voltage of approximately 400 volts at a frequency of 30 kHz between the terminals 500 and 520.
  • the maximum power of the auxiliary voltage source with a discharge lamp of 58 watts is 5 volt amperes.
  • the auxiliary voltage source essentially consists of three parts, a rectifier part, a multivibrator and an amplifier.
  • the multivibrator consists of an integrated circuit with a known structure and known external wiring; it is followed by a two-stage amplifier, also of a known design.
  • the output stage of the amplifier contains a transformer, the secondary winding of which lies between the terminals 510, 520 via a decoupling capacitor. This avoids a short circuit in the supply voltage supplied by control unit 3; conversely, the series choke 2 keeps the higher-frequency voltage away from the control unit 3.
  • the second secondary winding 42 of the heating transformer 4 is connected to the electrode 12 via a detection resistor 51.
  • This secondary winding 42 supplies a voltage which is greater than the voltage on the secondary winding 43 by the voltage drop across the detection resistor 51.
  • a third secondary winding 44 feeds the auxiliary voltage source via a rectifier 57, which supplies the DC supply voltage for an astable multivibrator 55, which is formed by an IC 50 with the usual wiring of its terminals.
  • a power MOS transistor 56 is periodically opened and closed by this multivibrator 35, the control path of which is connected to the terminal 03 of the IC 50 for this purpose.
  • a partial winding of an autotransformer 53 is connected to the rectifier 57 via its switching path; on the other hand, the entire winding of the autotransformer is connected via a decoupling capacitor 34 and the switching path of the transistor 56 is connected to the electrodes of the discharge lamp 1 via the terminals 62 and 63.
  • the IC 50 has a blocking input 04 in a known manner: If a positive voltage is applied to this, the multivibrator constructed with this IC oscillates.
  • This input 04 is now connected via a diode 54 and a transistor 52 to the secondary winding 42 in the ground-side heating circuit; the control path of this transistor 32 is parallel to the detection resistor 51: as long as the arrangement shown is switched on and current flows in the ground-side heating circuit, the transistor 52 is periodically conductive. This creates a DC voltage at input 04, to which an RC element lies in parallel, which is a prerequisite for the oscillating operation of the multivibrator.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Claims (10)

1. Dispositif pour contrôler la luminosité d'une lampe à décharge basse pression (1) comportant deux électrodes (11, 12) qui sont susceptibles d'être chauffées et qui sont reliées à des enroulements secondaires (42, 43) d'un transformateur de chauffage (4), ainsi qu'un appareil de contrôle (3) qui est alimenté par le réseau de tension alternative, qui fournit une tension réglable et dont la sortie qui fournit cette tension est reliée, par l'intermédiaire d'un ballast inductif (2), entre les électrodes de la lampe à décharge (1), caractérisé par un appareil supplémentaire (6) qui fournit une tension auxiliaire de haute fréquence et sensiblement constante, qui est appliquée en permanence entre les électrodes (11, 12) de la lampe à décharge.
2. Dispositif selon la revendication 1, caractérisé par le fait que l'appareil supplémentaire comporte le transformateur de chauffage (4) et une source de tension auxiliaire (5) qui, du côté entrée, est reliée à un enroulement secondaire (42) du transformateur de chauffage (4).
3. Dispositif selon la revendication 2, caractérisé par le fait que le transformateur de chauffage (4) possède un enroulement secondaire distinct servant à l'alimentation de la source de tension auxiliaire (5).
4. Dispositif selon la revendication 2, caractérisé par le fait que la source de tension auxiliaire (5) est reliée, du côté entrée, à un enroulement secondaire (42) du transformateur de chauffage (4) et qui alimente, en même temps, l'une des électrodes (12) de la lampe à décharge (1).
5. Dispositif selon la revendication 4, caractérisé par le fait que la source de tension auxiliaire (5) est réalisée sous la forme d'un agencement tripolaire.
6. Dispositif selon l'une des revendications 1 à 5, caractérisé par un dispositif de contrôle (51, 52) à l'aide duquel la tension auxiliaire est débranchée lors d'une coupure à la terre du circuit de chauffage (12, 42, 51
7. Dispositif selon la revendication 6, du type comportant un multivibrateur astable (55) qui comporte une entrée de blocage (04), caractérisé par le fait que l'entrée de blocage (04) est reliée, par l'intermédiaire de l'interrupteur (52) à l'enroulement secondaire (42), dans le circuit de chauffage, côté terre, lequel interrupteur est fermé lorsqu'un courant passe dans ce circuit de chauffage.
8. Dispositif selon la revendication 7, caractérisé par le fait que l'interrupteur est un transistor (52) dont la voie de commande est en parallèle sur une résistance de détection (51) située dans le circuit de chauffage, côté terre.
9. Dispositif selon la revendication 8, caractérisé par le fait que la tension qui est fournie par l'enroulement secondaire (42) dans le circuit de chauffage côté terre est supérieure à la tension au niveau de l'enroulement secondaire (43) dans l'autre circuit de chauffage, d'une valeur égale à la chute de tension aux bornes de la résistance de détection (51).
10. Dispositif selon la revendication 2, caractérisé par le fait que l'appareil supplémentaire comporte, en plus des bornes de liaison au réseau (61, 62), également des bornes (63 à 66) pour les électrodes (11,12) de la lampe à décharge (1), qui sont susceptibles d'être chauffées.
EP83112266A 1982-12-10 1983-12-06 Dispositif pour contrôler l'intensité d'une lampe de décharge à basse pression Expired EP0111296B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83112266T ATE29361T1 (de) 1982-12-10 1983-12-06 Anordnung zur steuerung der helligkeit einer niederdruckentladungslampe.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19823245817 DE3245817A1 (de) 1982-12-10 1982-12-10 Anordnung zur steuerung der helligkeit einer niederdruckentladungslampe
DE3245817 1982-12-10
DE3328378 1983-08-05
DE19833328378 DE3328378A1 (de) 1983-08-05 1983-08-05 Anordnung zur steuerung der helligkeit einer niederdruckentladungslampe

Publications (2)

Publication Number Publication Date
EP0111296A1 EP0111296A1 (fr) 1984-06-20
EP0111296B1 true EP0111296B1 (fr) 1987-09-02

Family

ID=25806463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112266A Expired EP0111296B1 (fr) 1982-12-10 1983-12-06 Dispositif pour contrôler l'intensité d'une lampe de décharge à basse pression

Country Status (3)

Country Link
EP (1) EP0111296B1 (fr)
DE (1) DE3373399D1 (fr)
FI (1) FI78212C (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3826234A1 (de) * 1988-08-02 1990-02-08 Kulzer & Co Gmbh Schaltungsanordnung zum betrieb einer niederdruckgasentladungslampe
US5144205A (en) * 1989-05-18 1992-09-01 Lutron Electronics Co., Inc. Compact fluorescent lamp dimming system
DE4025939C2 (de) * 1990-08-16 1994-03-24 Diehl Gmbh & Co Schaltungsanordnung für das Starten und die Helligkeitssteuerung einer Leuchtstofflampe im Betrieb
DE4025938A1 (de) * 1990-08-16 1992-02-20 Diehl Gmbh & Co Schaltungsanordnung fuer den betrieb einer leuchtstofflampe
TR200100424T2 (tr) * 1998-10-01 2001-05-21 Inotec Gesellschaft F�R Verkaufsf�Rderung,Innovation Und Bir floresan tüp devresinin enerji tasarrufuna yönelik düzenlenmesi.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2508923A1 (de) * 1975-03-01 1976-09-09 Bbc Brown Boveri & Cie Elektronische zusatzschaltungsanordnung
US4230971A (en) * 1978-09-07 1980-10-28 Datapower, Inc. Variable intensity control apparatus for operating a gas discharge lamp
JPS5919639B2 (ja) * 1979-09-28 1984-05-08 東芝ライテック株式会社 放電灯点灯装置
EP0060458A3 (fr) * 1981-03-16 1983-08-03 Koch Elektronik + Apparatebau AG Equipement pour régler la luminosité d'une lampe à fluorescence

Also Published As

Publication number Publication date
DE3373399D1 (en) 1987-10-08
FI834428A (fi) 1984-06-11
FI834428A0 (fi) 1983-12-02
EP0111296A1 (fr) 1984-06-20
FI78212B (fi) 1989-02-28
FI78212C (fi) 1989-06-12

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