Global Patent Index - EP 1203512 A1

EP 1203512 A1 20020508 - METHOD AND CIRCUIT FOR OPERATING A SODIUM HIGH-PRESSURE LAMP

Title (en)

METHOD AND CIRCUIT FOR OPERATING A SODIUM HIGH-PRESSURE LAMP

Title (de)

VERFAHREN UND SCHALTUNGSANORDNUNG FÜR DEN BETRIEB EINER NATRIUMHOCHDRUCKLAMPE

Title (fr)

PROCEDE ET CIRCUIT POUR FAIRE FONCTIONNER UNE LAMPE HAUTE PRESSION AU SODIUM

Publication

EP 1203512 A1 20020508 (DE)

Application

EP 01953887 A 20010709

Priority

  • DE 0102549 W 20010709
  • DE 10033262 A 20000710

Abstract (en)

[origin: WO0205600A1] Sodium high-pressure lamps can be operated using a circuit, which rectifies the a.c. supply voltage and which, while eliminating smoothing, feeds the supply voltage directly to a power inverter for generating a frequency greater than 1 kHz. The voltage that is modulated to double the power-line frequency is supplied via an HF inductive resistor and via an ignition transmitter to the lamp, which is preferably filled with xenon to a pressure exceeding 1 bar. The savings in electric energy for the system lamp ballast is equal to 30 % compared to a choke-operated Hg-free standard lamp having the same luminous flux. The use of a microprocessor for controlling the half bridge enables an externally controlled or automatic power reduction with an additional potential of savings in electric energy equal to an annual mean of 35 % and enables an end of life shutdown of the system in order to prevent cycling.

IPC 1-7

H05B 41/00

IPC 8 full level

H05B 41/288 (2006.01)

CPC (source: EP KR US)

H05B 41/231 (2013.01 - KR); H05B 41/2887 (2013.01 - EP US); Y02B 20/00 (2013.01 - EP US)

Citation (search report)

See references of WO 0205600A1

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 0205600 A1 20020117; CA 2384513 A1 20020117; DE 10033262 A1 20020124; EP 1203512 A1 20020508; HU P0202301 A2 20021128; KR 20020030812 A 20020425; US 2002149325 A1 20021017

DOCDB simple family (application)

DE 0102549 W 20010709; CA 2384513 A 20010709; DE 10033262 A 20000710; EP 01953887 A 20010709; HU P0202301 A 20010709; KR 20027003167 A 20020309; US 4890602 A 20020204