Global Patent Index - EP 1018289 A1

EP 1018289 A1 2000-07-12 - ELECTRONIC BALLAST SYSTEM

Title (en)

ELECTRONIC BALLAST SYSTEM

Title (de)

ELEKTRONISCHES VORSCHALTGERÄT

Title (fr)

SYSTEME DE BALLAST ELECTRONIQUE

Publication

EP 1018289 A1 (EN)

Application

EP 98931259 A

Priority

  • US 9812321 W
  • US 89918497 A

Abstract (en)

[origin: WO9905893A1] An electronic ballast system for flourescent lamps (56,57). A power oscillator (12) is connected to the primary winding of a power transformer (T1) for operation at a predetermined frequency in the range of 10 KHz to 5 MHz, and a ballasting network is connected to the secondary winding (31) of the transformer and to one or more of the lamps. The ballasting network is resonant at a frequency within about +/- 10 percent of the predetermined frequency, and in some embodiments, the resonant frequency of the ballasting network remains the same regardless of the number of lamps connected to it.

IPC 1-7 (main, further and additional classification)

H05B 41/36

IPC 8 full level (invention and additional information)

H05B 41/295 (2006.01)

CPC (invention and additional information)

H05B 41/295 (2013.01)

Citation (search report)

See references of WO 9905893A1

Designated contracting state (EPC)

CH DE FR GB IT LI

DOCDB simple family

WO 9905893 A1 19990204; CA 2297255 A1 19990204; EP 1018289 A1 20000712