EP 1103166 A1 20010530 - ELECTRONIC BALLAST FOR AT LEAST ONE LOW-PRESSURE DISCHARGE LAMP
Title (en)
ELECTRONIC BALLAST FOR AT LEAST ONE LOW-PRESSURE DISCHARGE LAMP
Title (de)
ELEKTRONISCHES VORSCHALTGERÄT FÜR MINDESTENS EINE NIEDERDRUCK-ENTLADUNGSLAMPE
Title (fr)
BALLAST ELECTRONIQUE DESTINE A AU MOINS UNE LAMPE A DECHARGE BASSE TENSION
Publication
Application
Priority
- DE 19923946 A 19990525
- DE 19934687 A 19990723
- EP 0003572 W 20000419
Abstract (en)
[origin: WO0072642A1] The invention relates to an electronic ballast for at least one low-pressure discharge lamp. Said ballast contains an inverter, which is connected to a source of direct voltage (U>BUS<), a load circuit, which is connected to said inverter and which contains the lamp (LA) and a serial resonant circuit, and an evaluation circuit (M1), which reacts to different operating modes of the lamp (LA) and in the event of a defect or if the lamp (LA) is removed, produces corresponding signals, which are used to switch off the inverter. A filament transformer is provided for heating the filament (W1, W2). The primary winding (Tp) of said filament transformer is connected in series to a switch (S3) at the output of the inverter and then to the direct voltage source (U>BUS<) whenever the inverter is switched off because of a heating filament defect or because the lamp (LA) has been removed, the switch (S3) being clocked in this switching off phase.
IPC 1-7
IPC 8 full level
H05B 41/298 (2006.01)
CPC (source: EP US)
H05B 41/2985 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0072642 A1 20001130; AT E245337 T1 20030815; AU 4553500 A 20001212; AU 761360 B2 20030605; BR 0007013 A 20010703; EP 1103166 A1 20010530; EP 1103166 B1 20030716; US 2001007410 A1 20010712; US 6433490 B2 20020813
DOCDB simple family (application)
EP 0003572 W 20000419; AT 00927002 T 20000419; AU 4553500 A 20000419; BR 0007013 A 20000419; EP 00927002 A 20000419; US 76661101 A 20010123