EP1943886A1 - Circuit de commande d'un transformateur commutable de chauffage d'un appareil electronique de pre-commutation et procede correspondant - Google Patents

Circuit de commande d'un transformateur commutable de chauffage d'un appareil electronique de pre-commutation et procede correspondant

Info

Publication number
EP1943886A1
EP1943886A1 EP06807557A EP06807557A EP1943886A1 EP 1943886 A1 EP1943886 A1 EP 1943886A1 EP 06807557 A EP06807557 A EP 06807557A EP 06807557 A EP06807557 A EP 06807557A EP 1943886 A1 EP1943886 A1 EP 1943886A1
Authority
EP
European Patent Office
Prior art keywords
heating transformer
frequency
electronic ballast
inverter
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.)
Granted
Application number
EP06807557A
Other languages
German (de)
English (en)
Other versions
EP1943886B1 (fr
Inventor
Harald Schmitt
Arwed Storm
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
Osram GmbH
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 Osram GmbH filed Critical Osram GmbH
Publication of EP1943886A1 publication Critical patent/EP1943886A1/fr
Application granted granted Critical
Publication of EP1943886B1 publication Critical patent/EP1943886B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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

Definitions

  • the present invention relates to a drive circuit for a switchable heating transformer of an electronic ballast having a circuit input terminal for receiving an oscillating inverter voltage (DC / AC converter) having a variable inverter frequency, and a switching device, at the output terminal of the heating transformer is clamped. Moreover, the present invention relates to a corresponding method for switching a heating transformer.
  • DC / AC converter oscillating inverter voltage
  • Vor.konzep ⁇ are te for ballasts for gas discharge lamps in use. These include, for example, preheating via the resonant capacitor of the load circuit, via an auxiliary winding on the lamp choke, via a resonant heating transformer and via a switchable heating transformer.
  • preheating via the resonant capacitor of the load circuit, via an auxiliary winding on the lamp choke, via a resonant heating transformer and via a switchable heating transformer.
  • the most expensive but also the most efficient solution for preheating is a switchable heating trough.
  • a corresponding drive signal and a driver or level converter is required, which are usually provided by an ASIC.
  • this ASIC also implements the entire process control.
  • the object of the present invention is thus to provide a simple drive circuit for a switchable heating transformer, wherein a synchronization with a externally controlled sequence control should be possible. Likewise, a corresponding method should be provided.
  • this object is achieved by a on ⁇ control circuit for a switchable heating transformer of an electronic ballast with a scarf ⁇ tion input terminal for receiving an oscillating inverter voltage, which has a variable inverter frequency, and a switching device, at the output terminal of the heating transformer can be clamped, as well as a Frequency evaluation device, which is connected downstream of the circuit input terminal and with which the inverter frequency is convertible into a drive signal for the switching device.
  • the invention provides a Ver ⁇ drive for switching a heating transformer of a elekt ⁇ tronic ballast by receiving an oscillating inverter voltage, which has a variable inverter frequency, converting the inverter frequency into a drive signal, and switching of the heating transformer in Ab ⁇ dependence of the control signal.
  • the invention is based on the idea that before the ignition of the gas discharge lamp, the frequency in the load circuit is higher than the nominal operation in which the lamp is on, and therefore the frequency difference Hérange to a control of the heating transformer before the ignition of the lamp ⁇ may be subjected.
  • the oscillating inverter voltage which is TiAl produced for example by the Lucaspoten- a half-bridge or full bridge, is used for generating a drive signal for the heating transformer, synchronization with egg ⁇ ner remotely controlled sequence control of the ballast is possible.
  • the frequency evaluation device preferably has a charge pump. It allows simple mittein a frequency To ⁇ translation into a drive signal.
  • the charge pump may be followed by a voltage divider.
  • the current generated by a charge pump can be converted into a desired voltage.
  • Güns ⁇ term as is this switching device comprises a MOSFET transistor. This device is characterized as a reliable switching unit.
  • a drive circuit for a heating transformer HT is shown.
  • a rectangular oscillating inverter voltage which comes from a Halbmaschinenstoff ⁇ point, not shown.
  • the input E feeds a charge pump.
  • This consists of the two capacitors Cl and C2 and the two diodes Dlund D2.
  • the capacitor C1 is connected to a terminal at the input E and the other terminal at the cathode of the diode Dl.
  • the anode of the diode Dl is connected to ground.
  • the cathode of the diode Dl is further connected to the anode of the diode D2.
  • the capacitor C2 is connected on the one hand to the cathode of the diode D2 and on the other hand to ground.
  • the capacitors Cl and C2 charge via the diode D2.
  • ⁇ adjusts the size of the Cl ge transported in C2 Ladungsmen ⁇ .
  • the diode D2 blocks and the capacitor Cl is discharged via the diode Dl. This process is repeated at each period a oszillie ⁇ Governing inverter or input voltage.
  • the averaged current transferred by the charge pump is directly proportional to the per ⁇ frequency of the inverter, not shown, as the frequency increases the charging in the capacitor C2 is carried out more and more often, so that its voltage increases.
  • the ohmic load can be implemented as a single resistor R2 or as a voltage divider Rl, R2 for more precise adjustment of the voltage.
  • the voltage divider Rl, R2 is for this purpose between the cathode of the diode D2 and ground and thus pa ⁇ rallel to the capacitor C2.
  • the center tap between the two resistors Rl and R2, that is, the output of the voltage part, is used to control a MOSFET transistor Sl, which is why its gate is connected to the center tap.
  • the gate is connected to ground with a capacitor C3.
  • the source of the MOSFET transistor is just ⁇ if connected to ground, while the drain is connected to the heating transformer HT.
  • the present at the output of the voltage portion voltage is directly proportional, provided the frequency of the square-wave input voltage, whose amplitude is stant ⁇ kon. Since the MOSFET transistor has a defined switching has threshold, the transistor is turned on and off in response to the frequency of the input voltage. This means that the heating transformer HT is switched on via the switching element MOSFET transistor Sl at a high inverter frequency (preheat phase) and is switched off at a low inverter frequency (lamp operating phase). So that the drive signal exactly follows the frequency of the inverter and thus a specified differently surrounded sequence control, which is realized for example by an ASIC.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Inverter Devices (AREA)

Abstract

Le signal de commande d'un transformateur commutable de chauffage d'un appareil électronique de pré-commutation doit pouvoir être réalisé de manière simple. Dans ce but, selon l'invention, une tension oscillante d'inverseur présente une fréquence modifiable d'inverseur, par exemple à prélever au centre d'un demi-pont. La fréquence d'inverseur est alors convertie de préférence à l'aide d'une pompe de charge (C1, C2, D1, D2) en un signal de commande. Le transformateur de chauffage (HT) est commuté en fonction de ce signal de commande. Cela permet également la synchronisation avec une commande extérieure du comportement de l'appareil électronique de pré-commutation.
EP06807557A 2005-11-03 2006-10-26 Circuit de commande d'un transformateur commutable de chauffage d'un appareil electronique de pre-commutation et procede correspondant Expired - Fee Related EP1943886B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005052525A DE102005052525A1 (de) 2005-11-03 2005-11-03 Ansteuerschaltung für einen schaltbaren Heiztransformator eines elektronischen Vorschaltgeräts und entsprechendes Verfahren
PCT/EP2006/067786 WO2007051751A1 (fr) 2005-11-03 2006-10-26 Circuit de commande d'un transformateur commutable de chauffage d'un appareil electronique de pre-commutation et procede correspondant

Publications (2)

Publication Number Publication Date
EP1943886A1 true EP1943886A1 (fr) 2008-07-16
EP1943886B1 EP1943886B1 (fr) 2009-10-07

Family

ID=37607099

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06807557A Expired - Fee Related EP1943886B1 (fr) 2005-11-03 2006-10-26 Circuit de commande d'un transformateur commutable de chauffage d'un appareil electronique de pre-commutation et procede correspondant

Country Status (9)

Country Link
US (1) US7723920B2 (fr)
EP (1) EP1943886B1 (fr)
KR (1) KR101339033B1 (fr)
CN (1) CN101300906B (fr)
AU (1) AU2006310628B2 (fr)
CA (1) CA2628465A1 (fr)
DE (2) DE102005052525A1 (fr)
TW (1) TW200723652A (fr)
WO (1) WO2007051751A1 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2350514A1 (de) * 1973-10-09 1975-04-30 Endress Hauser Gmbh Co Schaltungsanordnung zur anzeige von frequenzaenderungen einer wechselspannung
NL8702383A (nl) * 1987-10-07 1989-05-01 Philips Nv Elektrische inrichting voor het ontsteken en voeden van een gasontladingslamp.
US4998046A (en) * 1989-06-05 1991-03-05 Gte Products Corporation Synchronized lamp ballast with dimming
DE4140557A1 (de) * 1991-12-09 1993-06-17 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum betrieb einer oder mehrerer niederdruckentladungslampen
DE19520999A1 (de) * 1995-06-08 1996-12-12 Siemens Ag Schaltungsanordnung zur Wendelvorheizung von Leuchtstofflampen
BE1009717A3 (nl) * 1995-10-20 1997-07-01 Philips Electronics Nv Schakelinrichting.
DE19923945A1 (de) * 1999-05-25 2000-12-28 Tridonic Bauelemente Elektronisches Vorschaltgerät für mindestens eine Niederdruck-Entladungslampe
US6664742B2 (en) * 2002-01-11 2003-12-16 Koninklijke Philips Electronics N.V. Filament cut-back circuit
DE10345610A1 (de) * 2003-09-29 2005-05-12 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zum Betreiben mindestens einer Niederdruckentladungslampe
US7187132B2 (en) * 2004-12-27 2007-03-06 Osram Sylvania, Inc. Ballast with filament heating control circuit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007051751A1 *

Also Published As

Publication number Publication date
CN101300906B (zh) 2013-12-04
CA2628465A1 (fr) 2007-05-10
AU2006310628A1 (en) 2007-05-10
DE502006005054D1 (de) 2009-11-19
TW200723652A (en) 2007-06-16
US20090160356A1 (en) 2009-06-25
KR20080067370A (ko) 2008-07-18
CN101300906A (zh) 2008-11-05
WO2007051751A1 (fr) 2007-05-10
AU2006310628B2 (en) 2012-07-19
KR101339033B1 (ko) 2013-12-09
EP1943886B1 (fr) 2009-10-07
US7723920B2 (en) 2010-05-25
DE102005052525A1 (de) 2007-05-10

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