EP 0749269 B1 20001220 - Harmonic suppressor for an electronic ballast
Title (en)
Harmonic suppressor for an electronic ballast
Title (de)
Oberwellenfilter für ein elektronisches Vorschaltgerät
Title (fr)
Filtre d'harmoniques pour un ballast électronique
Publication
Application
Priority
FI 952974 A 19950616
Abstract (en)
[origin: EP0749269A2] The invention relates to a suppressor for an electronic ballast in a discharge lamp, which is connected between a ballast and a mains supply, including a supply-voltage rectifier (V1)) and a charging capacitor (C1), at least one energy-storing coil or inductance (L1) and an electronic switch element (V2) connected such that, when said switch element (V2) is conducting, a current path extends from the positive terminal of the rectifier (V1) through said switch and coil to its negative terminal and, when the switch (V2) is non-conducting, a current path extends from the positive terminal of the rectifier through a diode (V3) and the charging capacitor (C1) to its negative terminal. The switch element (V2) is controlled by means of a constant-frequency, permanent pulse-ratio control up to an operating point to be determined in view of a given momentary value of the mains voltage, whereafter the pulse ratio changes. <IMAGE>
IPC 1-7
IPC 8 full level
H05B 41/28 (2006.01)
CPC (source: EP)
H05B 41/28 (2013.01)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0749269 A2 19961218; EP 0749269 A3 19980401; EP 0749269 B1 20001220; DE 69611266 D1 20010125; DE 69611266 T2 20010426; FI 952974 A0 19950616; FI 97437 B 19960830; FI 97437 C 19961210
DOCDB simple family (application)
EP 96660026 A 19960607; DE 69611266 T 19960607; FI 952974 A 19950616