WO2007025849A1 - Ensemble circuit et procede pour faire fonctionner au moins une lampe electrique - Google Patents

Ensemble circuit et procede pour faire fonctionner au moins une lampe electrique Download PDF

Info

Publication number
WO2007025849A1
WO2007025849A1 PCT/EP2006/065246 EP2006065246W WO2007025849A1 WO 2007025849 A1 WO2007025849 A1 WO 2007025849A1 EP 2006065246 W EP2006065246 W EP 2006065246W WO 2007025849 A1 WO2007025849 A1 WO 2007025849A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
coupled
inverter
power supply
terminal
Prior art date
Application number
PCT/EP2006/065246
Other languages
German (de)
English (en)
Inventor
Olaf Busse
Markus Heckmann
Reinhard Lecheler
Alfons Lechner
Siegfried Mayer
Thomas Pollischansky
Bernd Rudolph
Bernhard Schemmel
Kay Schmidtmann
Harald Schmitt
Thomas Siegmund
Arwed Storm
Horst Werni
Original Assignee
Patent-Treuhand-Gesellschaft F�R Elektrische Gl�Hlampen 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 F�R Elektrische Gl�Hlampen Mbh filed Critical Patent-Treuhand-Gesellschaft F�R Elektrische Gl�Hlampen Mbh
Publication of WO2007025849A1 publication Critical patent/WO2007025849A1/fr

Links

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
    • 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
    • H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2985—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions

Definitions

  • the present invention relates to a circuit arrangement for operating at least one electric lamp with a rectifier, the input side has at least one connection for a mains voltage and the output side is coupled to an inverter, wherein the output of the inverter is coupled to a first terminal for the electric lamp, a second terminal for the electric lamp, which is coupled to the output signal of the rectifier, a control circuit for controlling the inverter having a power supply input, coupled to the power supply input first supply circuit for stationary power supply of the control circuit during operation of the inverter, and a second supply circuit coupled to the power supply input to the starting power supply of the control circuit in non-operation of the inverter, wherein the second supply circuit on the input side to the second terminal is coupled for the electric lamp such that a galvanic see connection to the output signal of the rectifier is given only when inserted electric lamp. It also relates to an operating method for at least one electric lamp on such a circuit arrangement.
  • Such circuit arrangements are used, for example, in electric ballasts for fluorescent lamps, wherein only a starting sequence, ie preheating and ignition, is to be executed by the circuit arrangement if at least one electrode of an electric lamp has been detected connected to the circuit arrangement.
  • a start-up path is generally used with a, in particular high-impedance, resistor, which is conducted via at least one electrode of a lamp.
  • This resistor is generally supplied from the rectified mains AC voltage, ie the output signal of the rectifier, and supplies the necessary starting current to a control circuit of the circuit arrangement so that the inverter can start up. In normal operation, however, this resistor generates undesirable losses, especially when the starting current requirement of the control circuit is high.
  • the present invention is therefore the object of the above-mentioned circuit arrangement or the aforementioned operating method in such a way that a more favorable energy balance is possible.
  • the present invention is based on the finding that the above object can be achieved if it is ensured that the internal resistance of the second supply circuit, which is supposed to ensure only the starting power supply of the control circuit, during the stationary power supply of the control circuit is greater than during the Start power supply of the control circuit. Because different internal resistances de the second supply circuit during start and during steady-state operation are relevant, arise in the second supply circuit different power losses. Since the supply of the second supply circuit still takes place from the same source, ie the output signal of the rectifier, different power losses occur only if the change of the internal resistance is not effected solely by different ohmic resistances, but by electronic switches, for example transistors. For example, can be achieved by using a bipolar transistor in the locked state, an increase in the internal resistance compared to the unlocked state, the blocking of the transistor is accompanied by only an insignificant increase in power dissipation.
  • the second supply circuit includes a switching element for switching between a first internal resistance during the stationary power supply and a second internal resistance during the starting power supply of the control circuit.
  • the switching element is preferably connected in series between the input and the output of the second supply circuit.
  • a preferred embodiment is characterized in that the second supply circuit is designed to effect the switching operation from the second internal resistance to the first internal resistance by a signal that can be generated by the inverter during operation.
  • the switching is automatically effected when a proper startup of the circuit arrangement, which concludes with putting the inverter into operation, has occurred.
  • the signal with which the switching operation from the second to the first internal resistance can be effected is preferably a voltage dropping at a first capacitance, which voltage is coupled to the inverter in such a way that it is charged during operation of the inverter.
  • the output of the first supply circuit is also coupled to the first capacitor.
  • the fact that the voltage difference between two terminals can be used as a control signal in an electronic switching element, can be effected by connecting the first capacitor to one of these terminals of the switching element, a modification of the relevant control voltage and a switching operation and as a result a switching operation from the second to first internal resistance can be effected.
  • the first capacitor is further coupled to the output signal of the rectifier, in particular via a high-impedance resistor, in order to operate in steady state operation - A -
  • Circuit arrangement to fix a certain switching position of the switching element. This ensures that a resistor arranged serially to the switching element, which in terms of its power loss only on short-term operation, d. H. the startup process is dimensioned, is not flowed through in current operation by a conductive switching element has become too long a time of electricity and is destroyed by the resulting power loss.
  • the second supply circuit has an input and an output
  • the switching element is a transistor having a control terminal, a reference terminal and a working terminal, wherein the control terminal and the reference terminal are coupled to the input of the second supply circuit and the Working connection to the output of the second supply circuit, wherein the output of the second supply circuit, the first capacitor is further coupled.
  • the transistor for example a bipolar transistor, in collector circuit, in which case the increase in the voltage across the first capacitance leads to a reduction of the base-emitter voltage and thus to an increase in the internal resistance of the second supply circuit.
  • a first resistor is coupled between the control terminal and the input of the second supply circuit and a second resistor between the reference terminal and the input of the second supply circuit, wherein the first resistor is greater than the second resistor. Since the switching element is locked in steady-state operation, therefore, only a very small current flows through the larger resistance, which is thus decisive for the internal resistance of the second supply circuit, and thus there is only a very low power loss. During the start of the control circuit, however, the switching element is fully opened, so that the smaller second resistance is relevant and therefore allows a large current flow to supply the control circuit.
  • the first capacitance is coupled between the output of the second supply circuit and a reference potential, preferably ground, and a first voltage limiting device is connected between the control terminal and the reference potential and a second voltage limiting device is connected parallel to the first capacitance, the limit voltage of the first voltage limiting device being smaller than the limit voltage of the second voltage limiting device, it can be achieved that in the course of a start operation, the capacitance is gradually charged and therefore the voltage across the capacitive From initially very small values, in which the switching element is still conductive, increases to larger values, in which then blocks the switching element.
  • a reference potential preferably ground
  • the transistor is conducting as long as the voltage at the first capacitance does not exceed the sum of the base-emitter path of the transistor (approximately 0.7 V) and the limit voltage of the first voltage limiting device. If this sum is exceeded, the transistor is blocked. Since this only happens with suitable dimensioning when the capacitor is also charged via the first supply circuit, the inverter is accordingly in operation, this is exactly the suitable switch-off criterion for the transistor.
  • an ohmic resistance is further arranged parallel to the first voltage limiting device, which ensures that in Undefined filament states, such as spiral breaks, the transistor is reliably held in a non-conductive state.
  • a capacitor which then serves as an integration capacitor in this connection and suppresses short contacts of the spiral which is interrupted per se, using the example of a helix fracture.
  • Figure 1 shows a schematic representation of the structure of a first embodiment of a circuit arrangement according to the invention.
  • Figure 2 shows a schematic representation of the structure of a second embodiment of a circuit arrangement according to the invention.
  • a mains voltage U N is applied to the input of a rectifier 10, which may be a DC or AC voltage.
  • a rectifier 10 which may be a DC or AC voltage.
  • the so-called intermediate circuit voltage U zw is provided and stabilized via a capacitor C5.
  • the intermediate circuit voltage U zw is applied to an inverter 12, wherein the output of the inverter 12 via a coupling capacitor Cl and an inductance LDL is connected to a first terminal Al for an electric lamp LAl.
  • a second terminal A2 for the lamp LAl is connected to the output signal of the rectifier 10, ie the intermediate circuit voltage U zw .
  • the inverter 12 is driven via a control circuit 14, which can deliver a single start pulse in a free-swinging inverter 12 or takes over in a not freely oscillating inverter 12, the continuous driving the switch of the inverter 12.
  • the control circuit 14 is supplied via its power supply input 16 with power in stationary operation, ie during operation of the inverter 12, via a first supply circuit 18 for stationary power supply of the control circuit 14 and a second supply circuit 20 to the start power supply of the control circuit 14 when not Operation of the Inverter 12.
  • the first supply circuit 18 comprises a capacitor C3, which is connected to the output signal of the inverter 12 and two diodes Dl, D2. In the illustrated arrangement, therefore, a positive output signal of the inverter 12 is fed to the power supply input 16 of the control circuit 14, while a negative output signal of the inverter 12 is derived via the diode Dl to ground.
  • the second supply circuit comprises a transistor Tl with a reference terminal B, a control terminal St and a working terminal A.
  • the control terminal St and the reference terminal B are connected via a respective ohmic resistance Rl, R2 to the side of the terminal A2 for the lamp LAl, the only with inserted lamp LAl is galvanically connected to the output signal U zw of the rectifier 10.
  • the control terminal St is also connected via a Zener diode D3 to the ground potential.
  • the working connection A is connected to the parallel connection of a capacitor C4 and a Zener diode. de D4, wherein the capacitor C4 is connected in parallel to the first supply circuit 18 to the power supply input 16 of the control circuit 14.
  • the capacitor C4 is also connected via an ohmic resistor R3 to the output signal U zw of the rectifier 10.
  • the control terminal St of the transistor Tl can continue to be connected via a parallel circuit of a capacitor C6 and an ohmic resistor to ground.
  • R2 and R3 are of approximately the same order of magnitude, while R1 is smaller than R2 or R3.
  • the threshold voltage of the Zener diode D4 is lower than the threshold voltage of the Zener diode D3.
  • R1 is 180 k ⁇
  • R2 is 1 M ⁇
  • R3 is 1M ⁇
  • R4 is 1 M ⁇
  • C6 is 22 nF.
  • the threshold voltage of the Zener diode D3 is 12 V and the threshold voltage of the Zener diode D4 is 8.2 V.
  • the voltage difference between the control terminal St and the working terminal A of the transistor Tl ensures that the transistor Tl is fully open, ie that a maximum current flow between its reference terminal B and its working terminal A is established.
  • the current I RI is approximately 190 ⁇ A.
  • the current I R2 is approximately 1.9 mA. This current leads to a rapid charge of the capacitor C4, for example within 10 to 20 ms, wherein the charging time can of course be influenced by the size of the capacitor C4.
  • the potential at the working terminal A of the transistor Tl increases until the voltage difference between the control terminal St and the working terminal A of the transistor Tl is no longer sufficient until the voltage difference causes the transistor Tl gradually in the blocking state passes.
  • the voltage on capacitor C4 is more than 7.5 V, this gradual transition to the blocking state begins. Since the threshold voltage of the zener diode D4 in the present case is 12 V, introduces charged capacitor C4 to a reliable blocking of the transistor Tl.
  • the successful oscillation of the inverter 12 must therefore take place within the period in which sufficient for the starting power supply of the control device 16 current I R2 is available. As soon as the inverter 12 is put into operation, a power supply of the control device 14 takes place via the first supply device 18.
  • a resistor R3 is provided, which is connected to the output signal U Z w of the rectifier 10, and ensures a steady charge on the capacitor C4 and in an amount sufficient to keep the transistor Tl after a start-up in the blocking state.
  • the ohmic resistor R4 By means of the parallel connection between the capacitor C6 and the ohmic resistor R4, which is optionally to be coupled between the control terminal St of the transistor T and the ground potential, it is achieved that in the case of undefined filament states, for example in the case of low-impedance filament breaks or EoL (end-of-life) states unwanted flickering of the e- lectric lamp is prevented by failed ignition attempts.
  • the ohmic resistance R4 namely the control terminal St of the transistor Tl is defined brought to ground potential, thus ensuring a reliable blocking state of the transistor Tl.
  • the ohmic resistor R4 must, on the one hand, be rated high-ohmic enough so that no relevant current flows through it to ground.
  • the capacitor C6 is to be dimensioned so that it together with the resistor R4 gives a suitable time constant, which is preferably in the order of 1 to 100 ms, in particular at 10 ms.
  • FIG. 2 shows a schematic representation of a second embodiment of a circuit arrangement according to the invention. Components which are identical or equivalent to those of FIG. 1 in terms of their function are provided with the same reference numerals as in FIG. 1 and will not be described again.
  • a circuit arrangement which is designed as a controlled natural oscillator The energy for the control of the electrical switches of the inverter ters 12 is obtained here by a feedback from the load circuit.
  • a natural oscillator controlled in this way is triggered, ie excited to oscillate, by means of an RC diac starting circuit, which comprises the ohmic resistor R 1, the capacitor C 7 and the diac D 5.
  • a portion of the current flowing through the ohmic resistor Rl is supplied via a resistor R5 to the control input St of the transistor Tl to control the transistor Tl. If the feedback is sufficiently strong, the main power supply via the capacitor C3. The capacitor C7 is discharged via a (not shown) switch and the transistor Tl thus blocked in normal operation of the circuit arrangement.

Abstract

La pr�sente invention concerne un ensemble circuit permettant defaire fonctionner au moins une lampe �lectrique (LA1), lequel ensemble comprend un redresseur (10), pourvu, c�t� entr�e, d'au moins une borne pour une tension de r�seau (UN) et coupl�, c�t� sortie, � un onduleur (12), la sortie de cet onduleur (12) �tant coupl�e � une premi�re borne (A1) de la lampe �lectrique (LA1), une seconde borne (A2) pour la lampe �lectrique (LA1), laquelle borne est coupl�e au signal de sortie (UZW) du redresseur (10), un circuit de commande (14) destin� � commander l'onduleur (12) et pourvu d'une entr�e d'alimentation en courant (16), un premier circuit d'alimentation (18), coupl� � l'entr�e d'alimentation en courant (16) et destin� � l'alimentation en courant stationnaire du circuit de commande (14) lorsque l'onduleur (12) fonctionne, ainsi qu'un second circuit d'alimentation (20) coupl� l'entr�e d'alimentation en courant et destin� � l'alimentation en courant d'amor�age du circuit de commande (14) lorsque l'onduleur (12) ne fonctionne pas, le second circuit d'alimentation (20) �tant coupl�, c�t� entr�e, � la seconde borne (A2) de la lampe �lectrique (LA1), de sorte qu'une liaison galvanique avec le signal de sortie (UZW) du redresseur (10) n'est �tablie que lorsque la lampe �lectrique (LA1) est utilis�e. Selon la pr�sente invention, la r�sistance interne du second circuit d'alimentation (20) pendant l'alimentation en courant stationnaire du circuit de commande (14) est plus �lev�e que pendant l'alimentation en courant d'amor�age du circuit de commande (14). Cette invention concerne �galement un proc�d� de fonctionnement pour au moins une lampe �lectrique (LA1) sur un ensemble circuit de ce type.
PCT/EP2006/065246 2005-08-30 2006-08-11 Ensemble circuit et procede pour faire fonctionner au moins une lampe electrique WO2007025849A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005041076.6 2005-08-30
DE200510041076 DE102005041076A1 (de) 2005-08-30 2005-08-30 Schaltungsanordnung und Verfahren zum Betrieb mindestens einer ektrischen Lampe

Publications (1)

Publication Number Publication Date
WO2007025849A1 true WO2007025849A1 (fr) 2007-03-08

Family

ID=37025105

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/065246 WO2007025849A1 (fr) 2005-08-30 2006-08-11 Ensemble circuit et procede pour faire fonctionner au moins une lampe electrique

Country Status (2)

Country Link
DE (1) DE102005041076A1 (fr)
WO (1) WO2007025849A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8098022B2 (en) 2007-04-23 2012-01-17 Osram Ag Circuit configuration for operating at least one discharge lamp and method for generating an auxiliary voltage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008138391A1 (fr) * 2007-05-10 2008-11-20 Osram Gesellschaft mit beschränkter Haftung Circuit et procédé permettant de faire fonctionner au moins une lampe à décharge

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5767631A (en) * 1996-12-20 1998-06-16 Motorola Inc. Power supply and electronic ballast with low-cost inverter bootstrap power source
US5883473A (en) * 1997-12-03 1999-03-16 Motorola Inc. Electronic Ballast with inverter protection circuit
WO2001056337A1 (fr) * 2000-01-28 2001-08-02 Robertson Worldwide, Inc. Alimentation electrique de lampe fluorescente mettant en application un circuit integre
US20030198066A1 (en) * 2002-04-23 2003-10-23 Joji Kasai Switching power supply

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5767631A (en) * 1996-12-20 1998-06-16 Motorola Inc. Power supply and electronic ballast with low-cost inverter bootstrap power source
US5883473A (en) * 1997-12-03 1999-03-16 Motorola Inc. Electronic Ballast with inverter protection circuit
WO2001056337A1 (fr) * 2000-01-28 2001-08-02 Robertson Worldwide, Inc. Alimentation electrique de lampe fluorescente mettant en application un circuit integre
US20030198066A1 (en) * 2002-04-23 2003-10-23 Joji Kasai Switching power supply

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8098022B2 (en) 2007-04-23 2012-01-17 Osram Ag Circuit configuration for operating at least one discharge lamp and method for generating an auxiliary voltage

Also Published As

Publication number Publication date
DE102005041076A1 (de) 2007-03-01

Similar Documents

Publication Publication Date Title
DE4002334C2 (de) Schaltung zum Betreiben einer elektrischen Entladelampe in einem Kraftfahrzeug
DE60205830T2 (de) Vorschaltgerät mit effizienter Elektroden-Vorheizung und Lampenfehlerschutz
EP0359860A1 (fr) Dispositif et procédé de mise en oeuvre d'au moins une lampe à décharge
DE69915164T2 (de) Gerät für eine Entladungslampe
DE19805733A1 (de) Integrierte Treiberschaltung
DE102007002731A1 (de) Lichtstromkreis
EP0801881A1 (fr) Procede permettant de faire fonctionner au moins une lampe a fluorescence au moyen d'un ballast electronique et ballast electronique utilise a cet effet
DE3608615A1 (de) Schaltungsanordnung zum betrieb von niederdruckentladungslampen
EP0693864B1 (fr) Circuit pour alimenter une ou plusieurs lampes à décharge basse-pression
DE102004037388B4 (de) Verfahren zur Detektion eines Nicht-Nullspannungsschaltbetriebs eines Vorschaltgeräts für Leuchtstofflampen und Vorschaltgerät
DE10201852A1 (de) Entladungslampen-Beleuchtungseinrichtung
DE19736894C2 (de) Integrierte Treiberschaltung
DE19622803A1 (de) Lichtstromkreis für Entladungslampe
EP1425943B1 (fr) Procede et dispositif destines au fonctionnement economique d'un tube fluorescent
WO2007025849A1 (fr) Ensemble circuit et procede pour faire fonctionner au moins une lampe electrique
EP2208400B1 (fr) Alimentation en courant commutable pour circuits auxiliaires dans un convertisseur
EP0871347B1 (fr) Ballast à réamorçage automatique
DE19734298B4 (de) Zündschaltkreis zum Zünden einer Leuchtstoffröhre mit vorheizbaren Elektroden
DE3626209A1 (de) Vorschaltgeraet fuer wenigstens eine entladungslampe
EP2274960B1 (fr) Procédé et agencement de circuits pour faire fonctionner au moins une lampe à décharge
WO2009010091A1 (fr) Montage et procédé pour faire fonctionner une lampe à décharge
EP1223792B1 (fr) Circuit d'amorçage des lampes électriques
EP1189487B1 (fr) Circuit électronique pour détecter l'usure des filaments de lampes à décharge
DE3503778C2 (de) Leuchtstofflampen-Vorschaltgerät
EP1048190B1 (fr) Ballast electronique pour lampe a decharge

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase

Ref document number: 06792783

Country of ref document: EP

Kind code of ref document: A1