EP0356818B1 - Circuit alimentant une charge - Google Patents

Circuit alimentant une charge Download PDF

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Publication number
EP0356818B1
EP0356818B1 EP89115183A EP89115183A EP0356818B1 EP 0356818 B1 EP0356818 B1 EP 0356818B1 EP 89115183 A EP89115183 A EP 89115183A EP 89115183 A EP89115183 A EP 89115183A EP 0356818 B1 EP0356818 B1 EP 0356818B1
Authority
EP
European Patent Office
Prior art keywords
circuit arrangement
switching transistor
arrangement according
converter
transformer
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
EP89115183A
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German (de)
English (en)
Other versions
EP0356818A3 (fr
EP0356818A2 (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
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
Publication of EP0356818A2 publication Critical patent/EP0356818A2/fr
Publication of EP0356818A3 publication Critical patent/EP0356818A3/fr
Application granted granted Critical
Publication of EP0356818B1 publication Critical patent/EP0356818B1/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

Definitions

  • the invention relates to a circuit arrangement for operating a load via a choke or a transformer according to the preamble of claim 1.
  • the circuit arrangement is used to operate gas discharge lamps. Since such circuit arrangements with line rectifiers generally generate harmonics in the line current, the circuit arrangement must have a passive or active harmonic filter, e.g. a boost converter.
  • a passive or active harmonic filter e.g. a boost converter.
  • Step-up converters require control with a clock generator for the switching transistor in order to limit the harmonic content of the current drawn by the network to the values permitted by VDE 0712. In the previously known circuits, this is done by an external controller, which can also include a complex sinusoidal control.
  • DE-AS 28 25 708 lists such a control circuit with a sinusoidal guide for a step-up converter.
  • the elaborately designed circuit arrangement for the control circuit includes, among other things, a pulse generator and an operational amplifier.
  • a non-sinusoidal step-up converter with approximately sinusoidal current consumption for an electronic fluorescent lamp ballast is described in the treatise "New lights and ballasts with reduced connected load” by SIEMENS Energytechnik 3 (1981), volume 5.
  • This circuit arrangement comprises a step-up converter as a harmonic filter and a push-pull frequency generator for lamp control and has a triangle-like current consumption from the network which meets the prescribed harmonic limitation.
  • the frequency generator and the step-up converter have different clock frequencies, so that interference occurs between the two frequencies.
  • an electronic ballast which consists of an active harmonic filter, in particular a step-up converter, and a downstream converter, the harmonic filter and the converter via a common external control circuit which is acted upon by a clock generator. being controlled.
  • the control circuit includes a pulse width modulator for operating the step-up converter and a pulse generator for the converter.
  • the object of the invention is to provide a circuit arrangement which makes no interference of frequencies possible and does not require a sinusoidal control.
  • the control circuit should consist of a few components and should be inexpensive to manufacture.
  • the base control of the switching transistor of the step-up converter from the same transformer as the transistors of the push-pull frequency generator provides a common clock generator for the transistors of the push-pull frequency generator and for the switching transistor of the step-up converter, which rules out interference between the two.
  • no additional Control circuit for the switching transistor of the step-up converter with a large number of circuit elements is required because the control for the push-pull frequency generator can also take over this function.
  • a current saturation toroidal transformer is advantageously used as the transformer, since the losses are kept very low.
  • the control winding of the current saturation toroidal transformer for the transistor of the push-pull frequency generator connected to the negative pole can simultaneously feed the base of the switching transistor of the step-up converter. This further simplifies the circuit arrangement.
  • the base control of the switching transistor in the step-up converter from the current saturation toroidal transformer takes place via a series resistor and a capacitor.
  • the base of the transistor is connected to its emitter via an adjustable resistor to set the duty cycle.
  • the step-up converter is bridged by a diode in the forward DC direction.
  • the voltage present at the output ie at the smoothing capacitor
  • the voltage present at the output is greater in all operating states than that behind the mains rectifier Peak value of the input voltage. If the switching transistor is blocked before the choke saturates, the reverse voltage in the choke drives the current through the diode into the smoothing capacitor until the energy content of the choke is no longer sufficient.
  • the inductor is supported on the latter, so that the energy content of the capacitor is added to the existing energy content of the inductor. All of this has the consequence that the output voltage of the step-up converter is greatly increased and the smoothing capacitor must be designed for a high operating voltage.
  • another switching transistor is therefore connected in series with the rectifier with its collector-emitter path in the forward DC direction, the base of which is also controlled from the same current saturation toroid transformer as the transistors of the push-pull frequency generator.
  • the base of the further switching transistor is connected to the emitter of the same via a limiting resistor and the control winding of the current saturation toroidal transformer, and at this connection point the cathode of a diode is connected, the anode of which is connected to the negative pole of the mains rectifier.
  • the inductance of the step-up converter is alternately supported on the input voltage or on the zero potential. This means that there is a sufficient voltage swing across the inductor available which ensures that the output voltage at the smoothing capacitor is only slightly above the line voltage peak at the back-up capacitor and that the current drawn by the network is very closely approximated to the sinusoidal form.
  • the necessary clock matching of both transistors is also achieved, and at the same time an additional control circuit for this further transistor can be dispensed with.
  • the collector-emitter path of the further switching transistor is bridged by a diode in the reverse DC direction. This prevents dangerous voltage peaks at the transistor during the switching breaks.
  • a control amplifier can be provided in the circuit arrangement for feeding a DC voltage via the adjustable resistor into the base of the switching transistor in the step-up converter.
  • the control amplifier receives its control signal and its voltage supply from a secondary winding, which is attached to the choke in the load circuit, to the current saturation toroidal transformer or to the choke of the step-up converter.
  • the control amplifier can also receive its signal and its voltage supply from the center tap of the push-pull frequency generator via a DC-decoupled transformer.
  • FIG. 1 shows the exact circuit diagram of a circuit arrangement according to the invention with a step-up converter for operating a low-pressure discharge lamp.
  • a rectifier GL At the network input of the circuit arrangement there is a rectifier GL, to whose DC output a supporting capacitor C1 is connected in parallel.
  • the self-regulating push-pull frequency generator consists of the two transistors T1, T2 with the reverse current diodes D3, D4, the series resistors R5 to R8, the control transformer and the starting generator with the resistors R4, R9, the starting capacitor C3, the diode D2, the diac D1 and the capacitor C4.
  • the control transformer works according to the feedback principle and is composed of the primary winding RK 1 and the two secondary windings RK2 and RK3, which sit on a common toroid.
  • the low-pressure discharge lamp LP is connected with a connection of the electrode E1 to the center tap M between the two transistors T1, T2 and with a connection of the other electrode E2 to the positive pole of
  • a series resonance circuit consisting of 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 of the control transformer and the corresponding connection of the electrode E1 and the resonance capacitor C6 between the connections of the electrodes E1 and E2 are switched.
  • a step-up converter is connected between the support capacitor C1 and the start-up generator of the push-pull frequency generator, which is composed of a choke L2, a diode D5, a switching transistor T3 and a smoothing capacitor C2.
  • the function of a step-up converter can be found in any book on switching power supplies, such as the book “Switching Power Supplies - Motor Controls" by Otto Macek.
  • the base of the transistor T3 is connected via a series connection of a coupling capacitor C7 and a resistor R1 to a tap between the drive winding RK3 of the transistor T2 and the series resistor R6.
  • the base of transistor T3 is connected to its emitter via an adjustable resistor R2.
  • the series connection of the choke L2 and the diode D5 is also a diode D6 in the forward DC direction connected in parallel.
  • the transistor of the step-up converter is switched in the same cycle as the transistors of the push-pull frequency generator.
  • the resistor R1 serves to limit the current, the resistor R2 to adjust the duty cycle of the transistor and thus to adjust the DC voltage on the smoothing capacitor C2.
  • the supply voltage for the push-pull frequency generator is set.
  • the diode D6 is used to bypass the step-up converter in the event of a brief overload of the frequency generator.
  • FIG. 2 shows a further circuit arrangement according to the invention for operating a low-pressure discharge lamp.
  • a further switching transistor T4 with its collector-emitter path is connected in the forward DC direction between the positive pole of the rectifier GL and the choke L3 of the step-up converter.
  • the base of transistor T4 is connected to its emitter via a series resistor R3 and via a further secondary winding RK4 of the control transformer.
  • a diode 8 is connected at the point of connection of the base to the emitter of the switching transistor T4 and is connected in the reverse DC direction to the negative pole on the mains rectifier GL.
  • the collector-emitter path of the switching transistor T4 is also bridged by a diode D7 in the reverse DC direction.
  • the inductor L2 is supported on zero potential during its discharge.
  • FIG. 3 shows a circuit arrangement corresponding to FIG. 1, a control amplifier RV being additionally provided.
  • the control amplifier is connected to the base of the switching transistor T3 via the adjustable resistor R2.
  • the control amplifier RV receives its voltage supply from a secondary winding L4 which is connected to the choke L1 of the load circuit.
  • the control amplifier is also connected to the negative pole of the mains rectifier.
  • variable voltage is supplied to the variable resistor R2, by means of the transistor T3 the supply voltage (for the push-pull frequency generator) on the capacitor C2 is constantly regulated.
  • a high-pressure discharge lamp such as e.g. a metal halide high pressure mercury discharge lamp can be operated.
  • a change in the respective circuit structure is not necessary for this.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Dc-Dc Converters (AREA)
  • Inverter Devices (AREA)

Claims (13)

  1. Montage pour faire fonctionner une charge par l'intermédiaire d'une bobine (L1) ou d'un transformateur, constitué d'un redresseur (GEL) de secteur auquel un condensateur (C1) d'appui est branché en parallèle, et d'un générateur de fréquence symétrique autoscillant destiné à produire une fréquence plus grande, la commande des transistors (Tl, T2) du générateur de fréquence symétrique, qui commutent en alternance, s'effectuant par rétroaction par un transformateur, dont l'un des enroulements fait partie du circuit de charge, et un filtre d'harmonique sous forme d'un montage survolteur constitué d'un transistor (T3) interrupteur, d'une bobine (L2), d'une diode (D5) et d'un condensateur (C2) de filtrage, étant branché entre le condensateur (C1) d'appui et le générateur de fréquence symétrique, caractérisé en ce que la base du transistor (T3) interrupteur du montage survolteur est commandée par le même transformateur que les transistors (T1, T2) du générateur de fréquence symétrique.
  2. Montage suivant la revendication 1, caractérisé en ce que le transformateur est un transformateur toroïdal à saturation de courant.
  3. Montage suivant la revendication 2, caractérisé en ce que l'enroulement (RK3) de commande du transformateur toroïdal à saturation de courant pour le transistor (T2), connecté au potentiel nul, du générateur de fréquence symétrique, alimente en même temps la base du transistor (T3) interrupteur du montage survolteur.
  4. Montage suivant l'une ou plusieurs des revendications 1 à 3, caractérisé en ce que la commande de la base du transistor (T3) interrupteur dans le montage survolteur s'effectue à partir du transformateur toroïdal à saturation de courant par l'intermédiaire d'une résistance (R1) de limitation branchée en série et d'un condensateur (C7).
  5. Montage suivant l'une ou plusieurs des revendications 1 à 4, caractérisé en ce que la base du transistor interrupteur (T3) est reliée à l'émetteur par l'intermédiaire d'une résistance (R2) réglable.
  6. Montage suivant la revendication 1, caractérisé en ce que la bobine (L2) et la diode (D5) du montage survolteur sont pontées par une diode (D6) dans le sens direct du courant continu.
  7. Montage suivant la revendication 1, caractérisé en ce qu'un autre transistor interrupteur (T4), dont la section collecteur-émetteur est dans le sens direct du courant continu, est branché en série avec le redresseur (GL) du secteur en amont du montage survolteur, la base de ce transistor interrupteur (T4) étant également commandée à partir du même transformateur que les transistors (T1, T2) du générateur de fréquence symétrique.
  8. Montage suivant la revendication 2 et 7, caractérisé en ce que la base de l'autre transistor interrupteur (T4) est reliée par l'intermédiaire d'une résistance (R3) de limitation et d'un enroulement (RK4) de commande du transformateur toroïdal à courant de saturation à l'émetteur du même transistor interrupteur (T4).
  9. Montage suivant la revendication 7 et 8, caractérisé en ce que la cathode d'une diode (D8), dont l'anode est reliée au pôle moins du redresseur (GL) du secteur, est connectée au point de liaison entre la base et l'émetteur de l'autre transistor interrupteur (T4).
  10. Montage suivant la revendication 7, caractérisé en ce que la section collecteur-émetteur de l'autre transistor interrupteur (T4) est pontée par une diode (T7) dans le sens inverse du courant continu.
  11. Montage suivant l'une ou plusieurs des revendications 1 à 5, caractérisé en ce qu'il est prévu un amplificateur (RV) de régulation destiné à fournir une tension continue par l'intermédiaire de la résistance réglable (R2) à la base du transistor interrupteur (T3).
  12. Montage suivant la revendication 11, caractérisé en ce que l'amplificateur (RV) de régulation reçoit son signal de régulation et son alimentation en tension, d'un enroulement secondaire (L4), qui est appliqué à la bobine (L1) dans le circuit de charge, au transformateur toroïdal à saturation de courant ou à la bobine du montage survolteur.
  13. Montage suivant la revendication 11, caractérisé en ce que l'amplificateur (RV) de régulation reçoit son signal de régulation et son alimentation en tension par l'intermédiaire d'un transformateur découplant du courant continu, de la prise médiane du générateur de fréquence symétrique.
EP89115183A 1988-08-30 1989-08-17 Circuit alimentant une charge Expired - Lifetime EP0356818B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3829388A DE3829388A1 (de) 1988-08-30 1988-08-30 Schaltungsanordnung zum betrieb einer last
DE3829388 1988-08-30

Publications (3)

Publication Number Publication Date
EP0356818A2 EP0356818A2 (fr) 1990-03-07
EP0356818A3 EP0356818A3 (fr) 1991-09-18
EP0356818B1 true EP0356818B1 (fr) 1995-06-07

Family

ID=6361886

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89115183A Expired - Lifetime EP0356818B1 (fr) 1988-08-30 1989-08-17 Circuit alimentant une charge

Country Status (3)

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US (1) US4959591A (fr)
EP (1) EP0356818B1 (fr)
DE (2) DE3829388A1 (fr)

Families Citing this family (23)

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ES2049790T3 (es) * 1989-10-09 1994-05-01 Siemens Ag Adaptador electronico.
US5426344B1 (en) * 1990-08-31 1996-12-31 Ultralite International Pty Li Electronic ballasts
US5138235A (en) * 1991-03-04 1992-08-11 Gte Products Corporation Starting and operating circuit for arc discharge lamp
US5150013A (en) * 1991-05-06 1992-09-22 Motorola, Inc. Power converter employing a multivibrator-inverter
ATE147926T1 (de) * 1992-09-24 1997-02-15 Knobel Lichttech Schaltungsanordnung zum betrieb einer leuchtstofflampe und zur messung des lampenstroms
JPH06215886A (ja) * 1993-01-14 1994-08-05 Matsushita Electric Works Ltd 電源装置
US5440475A (en) * 1993-11-08 1995-08-08 Energy Savings, Inc. Electronic Ballast with low harmonic distortion
DE9318071U1 (de) * 1993-11-25 1995-03-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München Schaltungsanordnung zum Betrieb einer Niederdruckentladungslampe an einer Niedervolt-Spannungsquelle
DE4410492A1 (de) * 1994-03-25 1995-09-28 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Betrieb von Niederdruckentladungslampen
FI96734C (fi) * 1994-11-22 1996-08-12 Helvar Oy Purkauslampun elektronisen liitäntälaitteen häiriösuodatin
DE19728295A1 (de) * 1997-07-03 1999-01-07 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Halbbrückenansteuerung ohne Kollektor-Vorstromspitze
US5998941A (en) * 1997-08-21 1999-12-07 Parra; Jorge M. Low-voltage high-efficiency fluorescent signage, particularly exit sign
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
US6300722B1 (en) 1997-11-05 2001-10-09 Jorge M. Parra Non-thermionic ballast-free energy-efficient light-producing gas discharge system and method
DE19905487A1 (de) * 1999-02-11 2000-08-31 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Betrieb mindestens einer Niederdruckentladungslampe
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
EP1104980A1 (fr) * 1999-11-30 2001-06-06 Mass Technology (H.K.) Ltd. Ballast électronique pour lampe à décharge
US6936973B2 (en) * 2002-05-31 2005-08-30 Jorge M. Parra, Sr. Self-oscillating constant-current gas discharge device lamp driver and method
DE10343275A1 (de) * 2003-09-18 2005-05-12 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Erzeugen von Wechselspannung aus einer Gleichspannung
DE102005058484A1 (de) * 2005-12-07 2007-06-14 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Schaltungsanordnung und Verfahren zum Betreiben mindestens einer LED
GB2459542B (en) * 2008-05-03 2010-05-26 David John Powell Electrical power supply arrangement
JP5835663B2 (ja) * 2011-11-10 2015-12-24 東芝ライテック株式会社 照明用電源および照明装置

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FR2416617A1 (fr) * 1978-02-07 1979-08-31 Signaux Entr Electriques Convertisseur pour l'alimentation de lampes a decharge, et plus generalement de lampes a arc, et son application aux projecteurs pour de telles lampes
DE2825708B2 (de) * 1978-06-12 1980-06-26 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung zum Verringern von Oberwellen im Netzwechselstrom bei Gleichstromverbrauchern, die aus dem Wechselstromnetz gespeist werden
AT374653B (de) * 1981-09-11 1984-05-25 Zumtobel Ag Elektronisches vorschaltgeraet fuer eine leuchtstoff- oder gasentladungsroehre mit einem gleichrichter und einem aktiven oberwellenfilter
US4533986A (en) * 1983-10-31 1985-08-06 General Electric Company Compact electrical power supply for signal processing applications
DE3611611A1 (de) * 1986-04-07 1987-10-08 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum hochfrequenten betrieb einer niederdruckentladungslampe
NL8800015A (nl) * 1988-01-06 1989-08-01 Philips Nv Elektrische inrichting voor het ontsteken en voeden van een gasontladingslamp.

Also Published As

Publication number Publication date
DE3829388A1 (de) 1990-03-01
EP0356818A3 (fr) 1991-09-18
EP0356818A2 (fr) 1990-03-07
US4959591A (en) 1990-09-25
DE58909282D1 (de) 1995-07-13

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