EP 1605734 A1 20051214 - Electronic ballast
Title (en)
Electronic ballast
Title (de)
Elektronisches Vorschaltgerät
Title (fr)
Ballast electronique
Publication
Application
Priority
- EP 02746706 A 20020624
- US 88784801 A 20010622
- US 603601 A 20011205
Abstract (en)
An electronic ballast for driving a gas discharge lamp includes a rectifier, a valley-fill circuit, an inverter having first and second series-connected controllably conductive device having complementary duty cycles, a control circuit for controlling the controllably conductive device, and an independent cat ear power supply to provide power to the ballast control circuits. The result is a ballast having substantially improved THD, and current crest factor. In a preferred embodiment, the valley-fill circuit includes an energy storage device that stores energy in response to a controllably conductive device. In an especially preferred embodiment, the controllably conductive device of the valley-fill circuit is also one of the controllably conductive devices of the inverter.
IPC 1-7
IPC 8 full level
H05B 41/282 (2006.01); H02M 7/12 (2006.01); H05B 41/28 (2006.01)
CPC (source: EP)
H05B 41/28 (2013.01)
Citation (search report)
- [A] ALONSO J M ET AL: "Evaluation of a novel single-stage high-power-factor electronic ballast based on integrated buck half-bridge resonant inverter", APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION, 2000. APEC 2000. FIFTEENTH ANNUAL IEEE NEW ORLEANS, LA, USA 6-10 FEB. 2000, PISCATAWAY, NJ, USA,IEEE, US, vol. 1, 6 February 2000 (2000-02-06), pages 610 - 616, XP010371777, ISBN: 0-7803-5864-3
- [A] YONG-SIK YOUN ET AL: "A unity power factor electronic ballast for fluorescent lamp having improved valley fill and valley boost converter", POWER ELECTRONICS SPECIALISTS CONFERENCE, 1997. PESC '97 RECORD., 28TH ANNUAL IEEE ST. LOUIS, MO, USA 22-27 JUNE 1997, NEW YORK, NY, USA,IEEE, US, vol. 1, 22 June 1997 (1997-06-22), pages 53 - 59, XP010241527, ISBN: 0-7803-3840-5
- [A] GYUN CHAE ET AL: "High power factor correction circuit using valley charge-pumping for low cost electronic ballasts", POWER ELECTRONICS SPECIALISTS CONFERENCE, 1998. PESC 98 RECORD. 29TH ANNUAL IEEE FUKUOKA, JAPAN 17-22 MAY 1998, NEW YORK, NY, USA,IEEE, US, vol. 2, 17 May 1998 (1998-05-17), pages 2003 - 2008, XP010294792, ISBN: 0-7803-4489-8
- [A] YAOW-MING CHEN ET AL: "PWM control using a modified triangular signal", INDUSTRIAL ELECTRONICS SOCIETY, 1999. IECON '99 PROCEEDINGS. THE 25TH ANNUAL CONFERENCE OF THE IEEE SAN JOSE, CA, USA 29 NOV.-3 DEC. 1999, PISCATAWAY, NJ, USA,IEEE, US, vol. 1, 29 November 1999 (1999-11-29), pages 312 - 317, XP010366852, ISBN: 0-7803-5735-3
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 03001855 A1 20030103; WO 03001855 A8 20040506; AT E448670 T1 20091115; AT E525895 T1 20111015; AU 2002316408 B2 20070906; DE 60234339 D1 20091224; EP 1605734 A1 20051214; EP 1605734 B1 20110921; ES 2336082 T3 20100408; IL 159465 A0 20040601; JP 2004533200 A 20041028; JP 4031429 B2 20080109
DOCDB simple family (application)
US 0220281 W 20020624; AT 02746706 T 20020624; AT 05017725 T 20020624; AU 2002316408 A 20020624; DE 60234339 T 20020624; EP 05017725 A 20020624; ES 02746706 T 20020624; IL 15946502 A 20020624; JP 2003508110 A 20020624