EP2005803B8 - Reduced power loss in electronic ballasts - Google Patents
Reduced power loss in electronic ballastsInfo
- 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.)
- Expired - Fee Related
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
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006017341A DE102006017341A1 (en) | 2006-04-11 | 2006-04-11 | Reduced power loss in electronic ballasts (ECGs) |
PCT/EP2007/053367 WO2007116016A1 (en) | 2006-04-11 | 2007-04-05 | Reduced power loss in electronic ballasts |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2005803A1 EP2005803A1 (en) | 2008-12-24 |
EP2005803B1 EP2005803B1 (en) | 2011-10-12 |
EP2005803B8 true EP2005803B8 (en) | 2012-03-21 |
Family
ID=38216089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07727835A Expired - Fee Related EP2005803B8 (en) | 2006-04-11 | 2007-04-05 | Reduced power loss in electronic ballasts |
Country Status (7)
Country | Link |
---|---|
US (1) | US8179052B2 (en) |
EP (1) | EP2005803B8 (en) |
JP (1) | JP4881429B2 (en) |
KR (1) | KR20080110667A (en) |
CN (1) | CN101422085A (en) |
DE (1) | DE102006017341A1 (en) |
WO (1) | WO2007116016A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101954893A (en) * | 2010-10-14 | 2011-01-26 | 上海中科深江电动车辆有限公司 | Soft-start device of electromobile |
Family Cites Families (9)
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 (en) * | 1985-04-22 | 1992-08-06 | 엘 에스 아이 로직 코포레이션 | High-speed cmos buffer with controlled slew rate |
US4999547A (en) * | 1986-09-25 | 1991-03-12 | Innovative Controls, Incorporated | Ballast for high pressure sodium lamps having constant line and lamp wattage |
JPH07272882A (en) * | 1994-03-31 | 1995-10-20 | Tabuchi Denki Kk | Stabilization power source device for discharge lamp |
CN1292538C (en) * | 2000-12-21 | 2006-12-27 | 新泻精密株式会社 | Smoothing circuit |
DE10241327A1 (en) | 2002-09-04 | 2004-03-18 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Circuit arrangement for operating discharge lamps |
US7030569B2 (en) * | 2003-10-16 | 2006-04-18 | Analog Microelectronics, Inc. | Direct drive CCFL circuit with controlled start-up mode |
JP3811174B2 (en) * | 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 converter |
-
2006
- 2006-04-11 DE DE102006017341A patent/DE102006017341A1/en not_active Withdrawn
-
2007
- 2007-04-05 KR KR1020087027486A patent/KR20080110667A/en not_active Application Discontinuation
- 2007-04-05 JP JP2009504702A patent/JP4881429B2/en not_active Expired - Fee Related
- 2007-04-05 CN CNA2007800128094A patent/CN101422085A/en active Pending
- 2007-04-05 US US12/226,279 patent/US8179052B2/en not_active Expired - Fee Related
- 2007-04-05 WO PCT/EP2007/053367 patent/WO2007116016A1/en active Application Filing
- 2007-04-05 EP EP07727835A patent/EP2005803B8/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US8179052B2 (en) | 2012-05-15 |
KR20080110667A (en) | 2008-12-18 |
DE102006017341A1 (en) | 2007-10-18 |
JP4881429B2 (en) | 2012-02-22 |
EP2005803A1 (en) | 2008-12-24 |
EP2005803B1 (en) | 2011-10-12 |
CN101422085A (en) | 2009-04-29 |
WO2007116016A1 (en) | 2007-10-18 |
US20090134811A1 (en) | 2009-05-28 |
JP2009533807A (en) | 2009-09-17 |
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