EP0655880B1 - Circuit basse tension pour l'alimentation d'une lampe à décharge basse pression - Google Patents

Circuit basse tension pour l'alimentation d'une lampe à décharge basse pression Download PDF

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Publication number
EP0655880B1
EP0655880B1 EP94117877A EP94117877A EP0655880B1 EP 0655880 B1 EP0655880 B1 EP 0655880B1 EP 94117877 A EP94117877 A EP 94117877A EP 94117877 A EP94117877 A EP 94117877A EP 0655880 B1 EP0655880 B1 EP 0655880B1
Authority
EP
European Patent Office
Prior art keywords
low
lamp
circuit arrangement
voltage
operating
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 - Lifetime
Application number
EP94117877A
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German (de)
English (en)
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EP0655880A1 (fr
Inventor
Walter Hirschmann
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
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Publication date
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0655880A1 publication Critical patent/EP0655880A1/fr
Application granted granted Critical
Publication of EP0655880B1 publication Critical patent/EP0655880B1/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/05—Starting and operating circuit for fluorescent lamp
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/07—Starting and control circuits for gas discharge lamp using transistors

Definitions

  • the invention relates to a circuit arrangement for operating a low-pressure discharge lamp on a low-voltage voltage source according to the preamble of the protection claim 1.
  • Circuit arrangements of this type are supplied by a battery in commercially available devices Luminaires that are equipped with a low-pressure discharge lamp are used. These lights are, for example, hand lights or Interior lights for campers and caravans.
  • the circuit arrangements work on the principle of the single-ended flyback converter, which is powered by the battery receives a few volts and this to the ignition or operating voltage the low-pressure discharge lamp.
  • the principle of operation a single-ended flyback converter is e.g. in the book "Schaltnetzmaschine" by W. Hirschmann / A. Hauenstein, ed. Siemens AG, edition 1990, described on pages 45-46.
  • a circuit arrangement based on this principle for operating a Low pressure discharge lamp is disclosed in US Pat. No. 4,973,885.
  • a disadvantage of this circuit arrangement is that the high-frequency alternating current due to the heatable lamp electrode, insufficient electrode preheating guaranteed. It has been shown that with insufficient preheating the heatable Lamp electrode the lamp end tends to blacken and after a certain Operating time has a reduced brightness. It also causes the feedback winding effective heating of the electrode filaments in the variable lamp Operating currents that cause the lamp to operate erratically.
  • the circuit arrangement according to the invention has two diodes, one of which first diode with a connection of the lamp ignition voltage or the lamp operating voltage generating secondary winding of the transformer and with a first lamp electrode is connected, while the second diode on the one hand with the other connection of the secondary winding and with the primary winding of the transformer and on the other hand connected to the second, heatable lamp electrode is.
  • the second diode ensures that the heatable lamp electrode during the Blocking phase of the flyback transistor from the primary winding of the transformer is heated with DC pulses, with premature ignition of the lamp due to the higher damping of the secondary voltage at the beginning of the electrode heating phase is prevented.
  • the circuit arrangement according to the invention advantageously contains an additional one Capacitor between the unheated lamp electrode and the positive pole of the Voltage source or the input capacitor or parallel to the first diode is switched.
  • This capacitor smoothes the DC voltage pulses and thus improves the operating behavior, especially the ignition, of the Low pressure discharge lamp. After the lamp has ignited, it goes into the heatable Lamp electrode converted heating power back to a low value.
  • With the Circuit arrangement according to the invention can also ignite the lamp low temperatures are guaranteed.
  • the circuit arrangement according to the first embodiment is for operation a hand lamp, which is equipped with a U-shaped fluorescent lamp. It works on the principle of the single-ended flyback converter and contains as Main components are a transistor T and a transformer with two secondary windings N2, N3 and ferrite core. A battery or a serves as voltage source Accumulator. In parallel with the voltage source is an electrolytic capacitor C1 with a comparatively high capacity switched. This input capacitor C1 charges on the battery voltage and prevents that with the discharge of the battery increasing internal resistance adversely affects lamp operation, i.e. that the lamp brightness drops too much with increasing discharge of the battery ..
  • the positive pole of capacitor C1 or the voltage source is at the beginning of the winding the primary winding N1 and with the winding end of the second secondary winding N3 of the transformer as well as with the electrode E2 and with the capacitor C4 connected.
  • the winding end of the primary winding N1 is to the collector connection of the switching transistor T, while the emitter connection of the transistor T to the negative pole of the input capacitor C1 or the voltage source connected.
  • the base connection of the transistor T is via a low pass R1, C2 and via an adjustable ohmic resistor R2 to the start of the winding second secondary winding N3 of the transformer. Parallel to the adjustable Resistor R2 is connected to a capacitor C3.
  • the low-pass capacitor C2 lies parallel to the base-emitter path of the transistor T.
  • a capacitor C5 Parallel to the collector-emitter path of transistor T, a capacitor C5 is arranged, which has the flashback voltage and reduces the power loss that occurs.
  • the winding start of the Secondary winding N2 of the transformer is connected to the collector terminal of the transistor T and connected to the winding end of the primary winding N1 while the winding end of the secondary winding N2 via the diode D1 and the short-circuited Electrode filament E1 of the fluorescent lamp L and via a smoothing capacitor C4 is led to the positive pole of the voltage source.
  • the winding end the primary winding N1 is via a second diode D2 and via second electrode filament E2 of the lamp L also with the positive pole of the voltage source connected.
  • the second Electrode coil E2 is not short-circuited and can therefore be used with a heating current be charged.
  • a switch S is integrated in the circuit arrangement, with which the circuit is switched on or off.
  • This circuit arrangement works on the principle of operation of the single-ended flyback converter.
  • the transformer stores on the primary side Energy that it receives in the blocking phase via the secondary winding N2 Lamp L emits.
  • the switching transistor T becomes the primary winding by means of the second one N1 feedback controlled secondary winding N3. Both secondary windings N2, N3 work in opposite directions to the primary winding N1.
  • N2 When transistor T is turned off, N2 is also in the first secondary winding an induction voltage, which causes the ignition required for the lamp L or operating voltage generated.
  • the diode D1 and the low resistance of the still cold lamp electrode E2 prevent the lamp L from igniting immediately.
  • the electrode heating phase extends over several switching cycles of the Transistor T and takes about 0.25 sec.
  • the switching frequency of transistor T is above 20 KHz.
  • the lamp L After the lamp L has been ignited, only the much smaller one is left with it Operating voltage of approx. 110 volts. Since the flyback converter the lamp L only during supplied the blocking phase of the transistor T, the lamp L is supposed to be operated unipolar DC pulses.
  • the diode D1 has a certain one Blocking delay, which allows a brief current flow even in the blocking direction, so that a high-frequency alternating current flows through the lamp L.
  • a sufficient high heating current flows through the second electrode filament E2 of the lamp L only during the blocking phase of the transistor T and only before the lamp is ignited.
  • the capacitor C4 serves to smooth the ignition voltage and allows a better one Ignite the fluorescent lamp.
  • the base control of the switching transistor T includes the feedback winding N3 of the transformer has an adjustable ohmic resistor R2 with a capacitor C3 connected in parallel and a low-pass filter that results from the ohmic Resistor R1 and capacitor C2 exist.
  • the low pass filters high frequencies Shares out of the base input signal of transistor T.
  • the lamp L is here with an electrical Power of approx.2.5 watts operated and powered by a 5 volt power source.
  • the switching frequency of the transistor T is approximately 55 KHz.
  • the second exemplary embodiment shown in FIG. 2 differs from the first Embodiment only through the capacitor C4 ', which instead of the capacitor C4 used and connected in parallel to the first diode Dl. All other details as well as the functional principle correspond to the first embodiment.
  • FIG. 3 shows a third embodiment of a circuit arrangement according to the invention.
  • This circuit arrangement essentially corresponds to that of the first exemplary embodiment. Identical components therefore have the same reference numerals in FIG. 3 as the corresponding components in Figure 1. However, it also contains an infinitely adjustable dimming resistor that dimmers the fluorescent lamp allowed and a charging socket that recharges the serving as a voltage source Accumulator enables. With the help of the dimming resistor, the duty cycle of the switching transistor and thus the electrical power supplied to the lamp be regulated.
  • This circuit arrangement according to the third embodiment contains as Main components are a transistor T and a transformer with two secondary windings N2, N3 and ferrite core.
  • Four NiCd battery cells serve as voltage source, which provide a voltage of approx. 5V.
  • an electrolytic capacitor C1 is switched with a comparatively high capacitance. This input capacitor C1 prevents that with the discharge of the battery increasing internal resistance adversely affects lamp operation.
  • the positive pole of capacitor C1 or the voltage source is at the end of the winding the primary winding N1 and with the beginning of the winding of the second secondary winding or feedback winding N3 of the transformer and with the Electrode E2 and connected to a capacitor C4.
  • the winding start of the Primary winding N1 is led to the collector terminal of the switching transistor T.
  • the base connection of the transistor T is via a low-pass filter R1, C2 and an adjustable one ohmic resistor R2 and a variable dimming resistor R3 led to the winding end of the second secondary winding N3 of the transformer.
  • the low-pass capacitor C2 is parallel to the base-emitter path of the transistor T.
  • a Capacitor C5 is arranged, the the flashback voltage and the power loss that occurs decreased.
  • the winding end of the secondary winding N2 of the transformer is with the collector terminal of the transistor T and with the start of the winding connected to the primary winding N1 during the beginning of the winding of the secondary winding N2 via a diode D1 and the short-circuited electrode coil El of the fluorescent lamp L and via the smoothing capacitor C4 to the positive pole Voltage source is guided.
  • the winding start of the primary winding N1 is over a second diode D2 and via the second electrode filament E2 of the lamp L.
  • the second electrode coil E2 is not short-circuited and can therefore be supplied with a heating current.
  • a switch S is between the positive pole of the The voltage source and the positive pole of the input capacitor C1 in integrated the circuit arrangement with which the circuit is switched on or off becomes.
  • the circuit arrangement contains a charging socket B, which is a recharge of the Accumulator allowed.
  • the connection 1 of the charging socket B is via a diode D3 and an ohmic resistor R4 with the positive pole of the voltage source and via one LED D4 and an ohmic resistor R5 with the negative pole of the Input capacitor C1 connected.
  • the connection 2 of the charging socket B is to the Emitter terminal of the transistor T connected, while the terminal 3 of the Charging socket B to the negative pole of the voltage source and to the negative pole of the input capacitor C1 is performed.
  • connections 2 and 3 of the charging socket B electrically connected to each other, so that the emitter of the Transistor T is present at the negative pole of the voltage source.
  • the invention is not limited to the exemplary embodiments explained in more detail.
  • Dimensioning of the circuit arrangement according to the first and second exemplary embodiments Ferrite transformer EF16 N1, N3 25 windings N2 420 windings R1 47 ⁇ R2 1 K ⁇ C1 100 ⁇ C2, C5 10 nF C3 22 nF C4, C4 ' 100 pF T D882-Y D1, D2 1N1937
  • Dimensioning of the circuit arrangement according to the third embodiment Ferrite transformer EF16 N1, N3 25 windings N2 420 windings R1 47 ⁇ R2 560 ⁇ R3 1 K ⁇ R4 47 ⁇ ; 0.8W R5 470 ⁇ C1 100 ⁇ ; 10 V C2, C5 10 nF C3 22 nF C4 150 pF; 1 KV T D882-Y D1, D2 1N1937 D3 1

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Claims (7)

  1. Montage pour faire fonctionner une lampe à décharge à basse pression sur une source de tension à basse tension, le montage étant réalisé en convertisseur à accumulation à une alternance, qui comprend un transistor (T) et un transformateur, l'enroulement (N1) primaire du transformateur étant monté en série avec la section de commutation du transistor (T) et le transformateur comportant un enroulement (N2) secondaire pour la tension d'allumage et la tension de fonctionnement de la lampe (L) ainsi qu'un enroulement (N3) de rétrocouplage pour commander l'électrode de commande du transistor (T),
       caractérisé en ce qu'une borne de l'enroulement (N2) secondaire du transformateur est reliée à une première électrode (E1) de la lampe par l'intermédiaire d'une première diode (D1), l'autre borne de l'enroulement (N2) secondaire est reliée à l'enroulement (N1) primaire et, par l'intermédiaire d'une deuxième diode (D2), à la deuxième électrode (E2) chauffable de lampe.
  2. Montage pour faire fonctionner une lampe à décharge à basse pression sur une source de tension à basse tension suivant la revendication 1, caractérisé en ce que le montage comprend un condensateur (C4) qui relie la première électrode (E1) de lampe à la deuxième électrode (E2) de lampe.
  3. Montage pour faire fonctionner une lampe à décharge à basse pression sur une source de tension à basse tension suivant la revendication 1, caractérisé en ce que le montage comprend un condensateur (C4') qui est monté en parallèle à la première diode (D1).
  4. Montage pour faire fonctionner une lampe à décharge à basse pression sur une source de tension à basse tension suivant la revendication 1, caractérisé en ce que le montage comprend une résistance (R3) variable qui permet d'obtenir une gradation de la lumière de la lampe (L).
  5. Montage pour faire fonctionner une lampe à décharge à basse pression sur une source de tension à basse tension suivant la revendication 4, caractérisé en ce que la résistance (R3) variable est reliée à l'enroulement (N3) de rétrocouplage et, par l'intermédiaire de résistances (R1, R2) supplémentaires, à l'électrode de commande du transistor (T).
  6. Montage pour faire fonctionner une lampe à décharge à basse pression sur une source de tension à basse tension suivant la revendication 1, caractérisé en ce que la source de tension à basse tension est constituée d'un accumulateur et en ce que le montage comprend une boíte (B) pour charger qui permet de recharger l'accumulateur.
  7. Montage pour faire fonctionner une lampe à décharge à basse pression sur une source de tension à basse tension suivant la revendication 1, caractérisé en ce que les deux électrodes de lampe sont alimentées en un courant de chauffage avant l'allumage de la lampe.
EP94117877A 1993-11-25 1994-11-11 Circuit basse tension pour l'alimentation d'une lampe à décharge basse pression Expired - Lifetime EP0655880B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9318071U 1993-11-25
DE9318071U DE9318071U1 (de) 1993-11-25 1993-11-25 Schaltungsanordnung zum Betrieb einer Niederdruckentladungslampe an einer Niedervolt-Spannungsquelle

Publications (2)

Publication Number Publication Date
EP0655880A1 EP0655880A1 (fr) 1995-05-31
EP0655880B1 true EP0655880B1 (fr) 1998-07-01

Family

ID=6901159

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94117877A Expired - Lifetime EP0655880B1 (fr) 1993-11-25 1994-11-11 Circuit basse tension pour l'alimentation d'une lampe à décharge basse pression

Country Status (5)

Country Link
US (1) US5461286A (fr)
EP (1) EP0655880B1 (fr)
JP (1) JP3010988U (fr)
CA (1) CA2135549C (fr)
DE (2) DE9318071U1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1271237B (it) * 1994-09-30 1997-05-27 Whirlpool Italia Dispositivo di controllo della potenza di elementi riscaldanti
JP3607428B2 (ja) * 1996-08-08 2005-01-05 松下電器産業株式会社 蛍光ランプ点灯装置
DE19649170A1 (de) * 1996-11-27 1998-05-28 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Betrieb einer Niederdruckentladungslampe an einer Niedervolt-Spannungsquelle
US6034485A (en) * 1997-11-05 2000-03-07 Parra; Jorge M. Low-voltage non-thermionic ballast-free energy-efficient light-producing gas discharge system and method
US5998941A (en) * 1997-08-21 1999-12-07 Parra; Jorge M. Low-voltage high-efficiency fluorescent signage, particularly exit sign
US6300722B1 (en) * 1997-11-05 2001-10-09 Jorge M. Parra Non-thermionic ballast-free energy-efficient light-producing gas discharge system and method
FI107655B (fi) * 1998-06-11 2001-09-14 Innoware Oy Elektroninen ohjauspiiri
TW437909U (en) * 1998-10-26 2001-05-28 Idea Up Tech Co Ltd Soft start device of lighting
US6465971B1 (en) 1999-06-02 2002-10-15 Jorge M. Parra Plastic “trofer” and fluorescent lighting system
US6411041B1 (en) 1999-06-02 2002-06-25 Jorge M. Parra Non-thermionic fluorescent lamps and lighting systems
US6936973B2 (en) * 2002-05-31 2005-08-30 Jorge M. Parra, Sr. Self-oscillating constant-current gas discharge device lamp driver and method
DE102004031445A1 (de) * 2004-06-29 2006-01-26 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Schaltungsanordnung und Betriebsgerät zum Betrieb von Lampen
US7330000B2 (en) * 2006-02-03 2008-02-12 Shimon Limor Discharge lighting bulbs control system
DE502007001515D1 (de) * 2006-02-09 2009-10-29 Sander Elektronik Ag Verfahren und Vorrichtung zum Zünden einer Fluoreszenz-Lampe
EP1915035A3 (fr) * 2006-09-26 2008-05-07 Sander Elektronik AG Procédé et dispositif destinés à l'alimentation d'une lampe à fluorescence dans une lampe d'urgence
CN102413621A (zh) * 2010-09-21 2012-04-11 奥斯兰姆有限公司 灯丝预热电路、方法及镇流器
US10375796B2 (en) * 2017-04-25 2019-08-06 Current Lighting Solutions, Llc Waveform shaping circuit for spurious harmonic suppression

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US3700956A (en) * 1971-01-04 1972-10-24 Gte Laboratories Inc Arc discharge lamp control circuit
US3869640A (en) * 1973-07-09 1975-03-04 Taras Avenir Kolomyjec Power supply arrangement for fluorescent tubes, thermionic devices and the like
GB1570277A (en) * 1975-10-01 1980-06-25 Sonca Ind Ltd Fluorescent lamp arrangement
JPS5321878A (en) * 1976-08-13 1978-02-28 Yoshinobu Ichinose Fluorescent lamp lighting device
US4234823A (en) * 1979-02-14 1980-11-18 National Computer Sign Company Ballast circuit for low pressure gas discharge lamp
AU555174B2 (en) * 1981-09-18 1986-09-18 Oy Helvar Electronic ballast for a discharge lamp
DE3608615A1 (de) * 1986-03-14 1987-09-17 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum betrieb von niederdruckentladungslampen
DE3829388A1 (de) * 1988-08-30 1990-03-01 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum betrieb einer last
US4973885A (en) * 1989-04-10 1990-11-27 Davis Controls Corporation Low voltage direct current (DC) powered fluorescent lamp
US5237243A (en) * 1992-04-23 1993-08-17 Chung Yeong Choon Dimming circuit for a fluorescent lamp

Also Published As

Publication number Publication date
DE9318071U1 (de) 1995-03-23
EP0655880A1 (fr) 1995-05-31
US5461286A (en) 1995-10-24
CA2135549C (fr) 2000-06-06
HK1010444A1 (en) 1999-06-17
JP3010988U (ja) 1995-05-09
DE59406367D1 (de) 1998-08-06
CA2135549A1 (fr) 1995-05-26

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