EP2005803B8 - Pertes de puissance reduites dans les ballasts electroniques - Google Patents

Pertes de puissance reduites dans les ballasts electroniques

Info

Publication number
EP2005803B8
EP2005803B8 EP07727835A EP07727835A EP2005803B8 EP 2005803 B8 EP2005803 B8 EP 2005803B8 EP 07727835 A EP07727835 A EP 07727835A EP 07727835 A EP07727835 A EP 07727835A EP 2005803 B8 EP2005803 B8 EP 2005803B8
Authority
EP
European Patent Office
Prior art keywords
power
power semiconductor
electronic ballast
semiconductor
ballast according
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.)
Not-in-force
Application number
EP07727835A
Other languages
German (de)
English (en)
Other versions
EP2005803B1 (fr
EP2005803A1 (fr
Inventor
Michele Tiso
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 EP2005803A1 publication Critical patent/EP2005803A1/fr
Application granted granted Critical
Publication of EP2005803B1 publication Critical patent/EP2005803B1/fr
Publication of EP2005803B8 publication Critical patent/EP2005803B8/fr
Not-in-force 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
    • H05B41/282—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
    • 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
    • H05B41/2821—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 by means of a single-switch converter or a parallel push-pull converter in the final stage

Definitions

  • the present invention relates to an electronic ballast (ECG) with a first hogurlei ⁇ ter, in particular a MOS-FET whose power is dimensioned to a starting power.
  • ECG electronic ballast
  • Electronic ballasts are in particular ⁇ sondere in lamps used for this is that a mainfre ⁇ -frequency mains voltage is first rectified and is converted to ⁇ closing by means of a high-frequency AC rectifier into a high frequency square wave voltage.
  • a high-frequency AC rectifier into a high frequency square wave voltage.
  • discharge lamps such as fluorescent tubes or energy-saving lamps
  • the ignition of the lamp must be done with a high voltage, for which the ECG must provide a high so-called starting power.
  • this starting power can amount to several hundred volts to several kV.
  • the static loading ⁇ powered - that is, after ignition of the gas discharge - the current may be reduced again, as a low enough voltage to operate the discharge lamp.
  • a power semiconductor is responsible in the ballast, des- dimension must be adapted to the required starting power. Therefore, mostly powerful MOSFET transistors are used, but they have a high power dissipation when the lamp goes into static operation.
  • Object of the present invention is therefore to provide an electronic ballast, the efficiency is improved over conventional solutions.
  • the power semiconductors are dimensioned differently.
  • the power of the second power semiconductor can be only 1/3 of the power of the first power semiconductor.
  • a control unit which controls the activation or deactivation of the power semiconductors. If the power semiconductors are also arranged parallel to one another, the drive can be that a switch, for example a breaker contact, is activated, which deactivates the first power semiconductor, so that only the second power semiconductor provides the power.
  • FIG. 1 shows a schematic partial view of a circuit diagram of a prior art electronic ballast
  • FIG. 2a shows a schematic partial view of a circuit diagram of a first embodiment of the electronic ballast according to the invention in a start-up phase
  • FIG. 2b shows a schematic partial view of a circuit diagram in FIG. 2a of an embodiment of the electronic ballast according to the invention in a static mode
  • Fig. 3 is a schematic partial view of a circuit diagram of a second embodiment of the electronic ballast according to the invention.
  • FIG. 1 shows a partial view of a circuit diagram of a conventional electronic ballast and shows as a selected component
  • MOSFETs can provide Shaped ⁇ -made power for igniting a gas discharge lamp while easily, but also consume in static operation of the lamp - so after lighting - a lot of energy, so a high power dissipation that is established. This in turn results in a lower efficiency of the electronic ballast.
  • MOSFETs used here are relatively large, so that a desired miniatu ⁇ ization of electronic ballasts Component-related limitations.
  • FIGS. 2a and 2b Such an electronic ballast according to the invention is shown in FIGS. 2a and 2b.
  • FIG. 2a shows the circuit of the electronic ballast in the starting state
  • FIG. 2b the circuit of the electronic ballast in static operation.
  • a first power semiconductor 4 and a second power semiconductor 4 ' are used in the embodiment shown here, which are connected in parallel.
  • a switching element 10 is provided, which is suitable for activating or deactivating the power semiconductor 4.
  • FIG. 2a the startup phase of an ECG is shown, i. the state in which a high voltage must be available to ignite, for example, a gas discharge lamp.
  • the switch 10 in a closed position, whereby both power semiconductors 4, 4 'are connected in parallel, so that complement their performance.
  • the first power semiconductor 4 can be deactivated fourth.
  • the switch 10 is opened, so that a power is delivered only via the second power semiconductor 4 '. Since the second power semiconductor 4 'alone has to provide only a smaller power, it can also be optimized for this smaller power. This significantly reduces the power loss of the electronic ballast.
  • the power of the second power semiconductor 4 ' is additionally lower than the power of the first power semiconductor 4. This is possible because often only 1/3 of the power required for the starting process is provided in stati ⁇ rule operation got to. This is schematically illustrated in FIGS. 2 a and 2 b in that the second power semiconductor 4 'has a smaller diameter. is set as the first power semiconductor 4. This results in even further power savings.
  • FIG. 3 shows the partial view of a circuit diagram of a second exemplary embodiment of the electronic ballast according to the invention. This differs from the exemplary embodiment shown in FIGS. 2a and 2b in that the switch 10 is integrated in the driver 2.
  • This can be realized, for example, by a control unit 12 which either makes both lines 14 and 14 'accessible, so that the first and second power semiconductors 4, 4' can provide power, or blocks the line 14, so that the power semiconductor 4 is disabled.
  • an electronic ballast in particular for the operation of gas discharge lamps, in which to the conventionally existing power semiconductor, a further power semiconductor is provided, which provides the necessary power for static operation.

Landscapes

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

Abstract

L'invention concerne un ballast électronique, notamment pour la commande de lampes à décharge, qui présente en plus des semiconducteurs de puissance traditionnellement présents un semiconducteur de puissance supplémentaire qui délivre la puissance nécessaire à un fonctionnement statique, ce qui permet d'éviter que les transistors MOSFET de puissance, qui présentent des pertes de puissance élevées, soient également utilisés pour le fonctionnement statique.
EP07727835A 2006-04-11 2007-04-05 Pertes de puissance reduites dans les ballasts electroniques Not-in-force EP2005803B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006017341A DE102006017341A1 (de) 2006-04-11 2006-04-11 Reduzierte Verlustleistung in Elektronischen Vorschaltgeräten (EVGs)
PCT/EP2007/053367 WO2007116016A1 (fr) 2006-04-11 2007-04-05 Pertes de puissance réduites dans les ballasts électroniques

Publications (3)

Publication Number Publication Date
EP2005803A1 EP2005803A1 (fr) 2008-12-24
EP2005803B1 EP2005803B1 (fr) 2011-10-12
EP2005803B8 true EP2005803B8 (fr) 2012-03-21

Family

ID=38216089

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07727835A Not-in-force EP2005803B8 (fr) 2006-04-11 2007-04-05 Pertes de puissance reduites dans les ballasts electroniques

Country Status (7)

Country Link
US (1) US8179052B2 (fr)
EP (1) EP2005803B8 (fr)
JP (1) JP4881429B2 (fr)
KR (1) KR20080110667A (fr)
CN (1) CN101422085A (fr)
DE (1) DE102006017341A1 (fr)
WO (1) WO2007116016A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101954893A (zh) * 2010-10-14 2011-01-26 上海中科深江电动车辆有限公司 电动汽车软启动装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4066930A (en) * 1975-04-02 1978-01-03 Electrides Corporation Energizing circuits for fluorescent lamps
GB2068656B (en) * 1980-01-29 1984-01-04 Thorn Emi Ltd Lamp drive circuit
KR920006438B1 (ko) * 1985-04-22 1992-08-06 엘 에스 아이 로직 코포레이션 슬루 레이트(slew rate)가 제어되는 고속 CMOS 버퍼
US4999547A (en) * 1986-09-25 1991-03-12 Innovative Controls, Incorporated Ballast for high pressure sodium lamps having constant line and lamp wattage
JPH07272882A (ja) * 1994-03-31 1995-10-20 Tabuchi Denki Kk 放電ランプ用安定化電源装置
JP3999664B2 (ja) * 2000-12-21 2007-10-31 新潟精密株式会社 平滑回路
DE10241327A1 (de) 2002-09-04 2004-03-18 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Schaltungsanordnung zum Betrieb von Entladungslampen
US7030569B2 (en) * 2003-10-16 2006-04-18 Analog Microelectronics, Inc. Direct drive CCFL circuit with controlled start-up mode
JP3811174B2 (ja) * 2005-05-02 2006-08-16 東京コイルエンジニアリング株式会社 Ｄｃ−ｄｃコンバータ

Also Published As

Publication number Publication date
EP2005803B1 (fr) 2011-10-12
US8179052B2 (en) 2012-05-15
EP2005803A1 (fr) 2008-12-24
CN101422085A (zh) 2009-04-29
JP4881429B2 (ja) 2012-02-22
KR20080110667A (ko) 2008-12-18
DE102006017341A1 (de) 2007-10-18
US20090134811A1 (en) 2009-05-28
JP2009533807A (ja) 2009-09-17
WO2007116016A1 (fr) 2007-10-18

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