EP0973359A2 - Ballast électronique avec limitation du courant d'appel - Google Patents

Ballast électronique avec limitation du courant d'appel Download PDF

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Publication number
EP0973359A2
EP0973359A2 EP99111406A EP99111406A EP0973359A2 EP 0973359 A2 EP0973359 A2 EP 0973359A2 EP 99111406 A EP99111406 A EP 99111406A EP 99111406 A EP99111406 A EP 99111406A EP 0973359 A2 EP0973359 A2 EP 0973359A2
Authority
EP
European Patent Office
Prior art keywords
inverter
electronic ballast
reference potential
winding
storage capacitor
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
EP99111406A
Other languages
German (de)
English (en)
Other versions
EP0973359B1 (fr
EP0973359A3 (fr
Inventor
Rene Twardzik
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 EP0973359A2 publication Critical patent/EP0973359A2/fr
Publication of EP0973359A3 publication Critical patent/EP0973359A3/fr
Application granted granted Critical
Publication of EP0973359B1 publication Critical patent/EP0973359B1/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
    • H05B41/282—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
    • H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2856—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against internal abnormal circuit conditions
    • 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 an electronic ballast for at least a fluorescent lamp according to the preamble of claim 1.
  • Fluorescent lamps generally have an electronic ballast a harmonic filter connected to the mains voltage, to which a rectifier circuit is connected with a boost converter. With this the rectified voltage usually with this particular group of power supplies increased approximately to the peak value of the feeding AC voltage and kept there.
  • the step-up converter charges a storage capacitor defines up to the predetermined charge level. This The storage capacitor thus forms a voltage-stabilized output stage the rectifier circuit.
  • Another peculiarity of electronic Ballasts are used to supply the fluorescent lamp (s) Load circuit with a high frequency, possibly in its frequency also changing AC voltage. This is connected to the rectifier circuit an inverter connected, which will eventually use the load circuit said AC voltage in the form of a high-frequency pulse train feeds.
  • the inverter is in the form of a push-pull chopper, which is formed by an oscillation transformer with two symmetrical windings and switches connected to them.
  • the invention is therefore based on the object of an electronic ballast to create the type mentioned in which an active Boost converter is used to take advantage of its benefits but at the same time an effective inrush current limitation with as much as possible simple means is achieved.
  • the current limitation is achieved by a simple limiting resistor reached, which is in series with the storage capacitor and further to those at low potential, the reference potential Return path to the rectifier arrangement is connected.
  • the advantage is such a simple circuit for limiting the inrush current but interacting with one from a half-bridge arrangement installed inverters of today’s usual design cannot be used easily.
  • This problem is solved in that the inverter as a converter network is formed, via which already in the switch-on phase a current path to the storage capacitor is closed.
  • FIG. 1 is a block diagram of an electronic ballast for Fluorescent lamps shown.
  • a rectifier arrangement 1 on the input side via a conventional mains switch SW1 to mains AC voltage u connected. This is done by means of a rectifier bridge rectified from diodes D1 to D4. At a high potential the output of this rectifier bridge are a charging choke in series L1 and a charging diode D5 polarized in the forward direction. The output of rectifier bridge D1 to D4 at low potential is placed on case ground.
  • This is a defined reference potential Uref set for the entire electronic ballast. Is on the cathode side the charging diode D5 is connected to a storage capacitor C2, the second connection, is set to reference potential Uref, as in detail will be presented.
  • connection point of the charging choke L1 and the charging diode D5 on the one hand and the reference potential Uref on the other hand a series connection arranged out of the switching path of a second switch, preferably an electronic switch SW2 and an ohmic resistor R0 exists.
  • This second switch SW2 forms the switching element of one Rectifier of the rectifier order 1.
  • the function is controlled this second switch SW2 via a control unit 4. Its inputs are each connected to the high potential output of the rectifier bridge D1 to D4, an auxiliary winding assigned to the charging choke L1 L11, at the point of connection of the second switch SW2 with that with it series resistance R0 or the high potential Connection of the storage capacitor C2 connected. Is on the output side this control unit 4 is connected to the control input of the second switch SW2.
  • the rectifier arrangement 1 described above represents one in itself known basic circuit of an AC / DC converter active step-up converter for an electronic ballast. It needs therefore only a summary functional description, as follows.
  • the rectifier bridge is connected to the outputs D1 to D4 emitted a pulsating DC voltage. This should by means of the storage capacitor forming the output stage of the rectifier arrangement 1 C2 transformed into a stabilized DC voltage U + become.
  • An inverter 2 is connected to the rectifier arrangement 1 in this case designed as a transformer-controlled push-pull chopper is. This converts the one supplied by the rectifier arrangement 1 stabilized DC voltage U + into a high-frequency pulse train.
  • a second choke L2 at the common connection point of two primary windings T1 / 1 or T1 / 2 of a vibration transmission T1 connected. Second connections of these primary windings T1 / 1 and T1 / 2 are initially with each other via a resonance capacitor lying in parallel with them C1 connected. Furthermore, these connections are each via the Switching distance of one of two further switches SW3 or SW4 to the reference potential Uref laid.
  • a control network 5 is shown schematically in FIG. 1 specified for these two further switches SW3 and SW4, to the circuit details are shown in the further Figures 2 and 3, as still is to be described.
  • the basic circuit shown in FIG. 1 for the inverter 2 with the symmetrically constructed vibration transmitter T1 is also known per se, the function of the inverter 2 can therefore be explained in summary as follows.
  • the control unit 5 is designed such that it alternatively switches one of the two further switches SW3 and SW4 to be conductive. Assuming that the switch SW3 is conductive when the switching path is closed, current flows through the further inductor L2 and the primary winding T1 / 1 of the oscillation transformer T1 associated with this currently conductive switch SW3 back into the rectifier arrangement 1. This also charges the resonance capacitor C1, the voltage at the currently non-conductive switch SW4 increases.
  • FIG. 1 further shows, there is a lamp load circuit 3 via a secondary winding T1 / 4 of the vibration transmitter T1 inductively coupled to the inverter 2.
  • a bipolar pulse train is in the lamp load circuit 3 coupled whose frequency through the switching periods of the two switches SW3 or SW4 of the inverter 2 is specified.
  • two fluorescent lamps La1, La2 are provided in the lamp load circuit.
  • the other filaments of the fluorescent lamps are together with the second connection of this secondary winding T1 / 4 directly connected.
  • FIG. 1 also shows one associated with the storage capacitor C2 Network shown.
  • This limiting resistance is in series with the storage capacitor C2, to the return branch lying at reference potential Uref in the Rectifier assembly 1 connected.
  • the connection point of the storage capacitor C2 with the limiting resistor R1 is over one each Coupling diode D6 and D7 to the connection of the further switches SW3 or SW4 connected with the corresponding primary winding T1 / 1 or T1 / 2 of the vibration transmitter T1 is connected.
  • Another diode is D8 the limiting resistor R1 connected in parallel.
  • FIG 2 is another embodiment of the electronic ballast shown. This essentially corresponds to that already shown above with reference to Figure 1. Like Circuit elements are identified by the same reference numerals. In the Further description is therefore only on the differences from the embodiment according to Figure 1.
  • FIG. 2 shows in more detail how the control unit 5 for the Both switches SW3 and SW4 of the inverter 2 can be configured.
  • the vibration transmitter T1 has one further secondary winding T1 / 3, which with a connection immediately on Reference potential Uref is set.
  • Your second connection is via another Charging diode D9 connected to a second storage capacitor C3, the on the other hand is set to reference potential Uref.
  • the cargo of this second Storage capacitor C3 supplies the supply voltages for the two Switches SW3 and SW4 of the inverter 2, which in this embodiment are designed as transistor switches.
  • control inputs and are each one of the winding connections further secondary winding T1 / 5 of the vibration transmitter T1 on the one hand and via another ohmic resistor R2 or R3 to the connection point of the second storage capacitor C3 with that assigned to it Charging diode D9 connected.
  • This connection point is over one of these two resistors, in the example R2 and another resistor R5 to the output of the stabilized DC voltage U + Rectifier assembly 1 connected.
  • The delivers in stationary operation with the basic connections of the switches SW3 or SW4 of the inverter 2 connected secondary winding T1 / 5 the commutator voltage to the alternative Activate these two switches.
  • FIG. 3 shows a further embodiment of the electronic ballast shown, which is only of the embodiment in Figure 2 with regard to the control of the further, with its switching path Limiting resistor R1 distinguishes transistor switch Q1 connected in parallel.
  • the two emitters are the transistor switches SW3, SW4 of the inverter 2 via a clamping diode D10 on the Reference potential Uref laid. This diode is also parallel to the emitter-base path the further switching transistor Q1.
  • the limiting resistor R1 ensures that the Inrush current during the start-up process. But as soon as the inverter 2 has started flows over the mutually conductive Transistor switch SW3 or SW4 current, which via the clamping diode D10 flows. The resulting voltage drop at the clamping diode D10 switches the further transistor switch Q1 conductive, which in turn the limiting resistor R1 shorts.
  • the exemplary embodiments described above teach that a simple and inexpensive solution for limiting the inrush current can be implemented in an electronic ballast with a rectifier arrangement which supplies a stabilized direct voltage by means of an active step-up converter. It is only necessary to ensure that there is a permanent ground connection, ie a conductive connection to the reference potential during operation. As explained, this can be done by means of an inverter Push-pull circuit.

Landscapes

  • Inverter Devices (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Rectifiers (AREA)
EP99111406A 1998-07-07 1999-06-11 Ballast électronique avec limitation du courant d'appel Expired - Lifetime EP0973359B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19830368 1998-07-07
DE19830368A DE19830368A1 (de) 1998-07-07 1998-07-07 Elektronisches Vorschaltgerät mit Einschaltstrombegrenzung

Publications (3)

Publication Number Publication Date
EP0973359A2 true EP0973359A2 (fr) 2000-01-19
EP0973359A3 EP0973359A3 (fr) 2002-11-13
EP0973359B1 EP0973359B1 (fr) 2004-08-25

Family

ID=7873250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99111406A Expired - Lifetime EP0973359B1 (fr) 1998-07-07 1999-06-11 Ballast électronique avec limitation du courant d'appel

Country Status (4)

Country Link
US (1) US6078144A (fr)
EP (1) EP0973359B1 (fr)
CA (1) CA2276913C (fr)
DE (2) DE19830368A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6366029B1 (en) * 2000-05-31 2002-04-02 Keith Billings Lamp ballast for reducing interference current
US6417629B1 (en) * 2000-12-06 2002-07-09 Koninklijke Philips Electronics N.V. Push-pull based voltage-clamping electronic ballast
DE10160790A1 (de) * 2001-01-12 2002-08-08 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Einschalten einer Teilschaltungsanordnung
DE10108138A1 (de) * 2001-02-20 2002-08-29 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schutzschaltung für eine Leuchstofflampe
AUPR610801A0 (en) * 2001-07-04 2001-07-26 Briter Electronics Controlling apparatus
DE10325872A1 (de) * 2003-06-06 2004-12-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Ansteuerschaltung für den Betrieb mindestens einer Lampe in einem dazugehörigen Lastkreis
US7109668B2 (en) * 2003-10-30 2006-09-19 I.E.P.C. Corp. Electronic lighting ballast
US20070194721A1 (en) * 2004-08-20 2007-08-23 Vatche Vorperian Electronic lighting ballast with multiple outputs to drive electric discharge lamps of different wattage
WO2008131795A1 (fr) * 2007-04-25 2008-11-06 Osram Gesellschaft mit beschränkter Haftung Appareil d'éclairage à circuit limiteur de courant d'allumage
US8294295B2 (en) * 2010-05-24 2012-10-23 Xiamen Lanxi Technology Co., Ltd. Power supply method with parallel-connected batteries
JP5052705B2 (ja) * 2011-01-17 2012-10-17 三菱電機株式会社 スイッチング電源装置
DE102011089553A1 (de) * 2011-12-22 2013-06-27 Robert Bosch Gmbh Elektronisches Vorschaltgerät für eine Gasentladungslampe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996001002A1 (fr) * 1994-06-28 1996-01-11 Philips Electronics N.V. Agencement de circuit
WO1997012308A1 (fr) * 1995-09-29 1997-04-03 Motorola Inc. Circuit de reduction d'appel de courant pour convertisseurs elevateurs de tension et protections electroniques
WO1997030569A1 (fr) * 1996-02-13 1997-08-21 Energy Savings, Inc. Ballast electronique limitant les pointes de puissance d'appel de courant

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5343122A (en) * 1989-07-27 1994-08-30 Ken Hayashibara Luminaire using incandescent lamp as luminous source
DE3934577A1 (de) * 1989-10-17 1991-04-18 Philips Patentverwaltung Stromversorgungseinrichtung mit einschaltstrombegrenzungsschaltung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996001002A1 (fr) * 1994-06-28 1996-01-11 Philips Electronics N.V. Agencement de circuit
WO1997012308A1 (fr) * 1995-09-29 1997-04-03 Motorola Inc. Circuit de reduction d'appel de courant pour convertisseurs elevateurs de tension et protections electroniques
WO1997030569A1 (fr) * 1996-02-13 1997-08-21 Energy Savings, Inc. Ballast electronique limitant les pointes de puissance d'appel de courant

Also Published As

Publication number Publication date
CA2276913A1 (fr) 2000-01-07
US6078144A (en) 2000-06-20
EP0973359B1 (fr) 2004-08-25
DE19830368A1 (de) 2000-02-03
EP0973359A3 (fr) 2002-11-13
DE59910327D1 (de) 2004-09-30
CA2276913C (fr) 2008-09-02

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