Global Patent Index - EP 2547176 A1

EP 2547176 A1 20130116 - Resonant converter for a gas discharge lamp

Title (en)

Resonant converter for a gas discharge lamp

Title (de)

Resonanzwandler für eine Gasentladungslampe

Title (fr)

Convertisseur résonant pour une lampe à décharge

Publication

EP 2547176 A1 20130116 (EN)

Application

EP 11250662 A 20110715

Priority

EP 11250662 A 20110715

Abstract (en)

The invention relates to methods and apparatus for control of electrical lighting, in particular for powering a gas discharge lamp using a resonant power converter. Embodiments disclosed include a method of controlling a resonant power converter (400) to drive a gas discharge lamp (401), the resonant power converter comprising first and second series connected switches (402, 403) connected between first and second supply voltage lines (404, 405) and a resonance circuit comprising a capacitor (406) and an inductor (407), the resonance circuit connected between a node (408) connecting the first and second switches (402, 403) and the second supply voltage line (405), the method comprising, in an operational mode, the sequential steps of: closing the first switch (402) to start a first conduction interval; and opening the first switch (402) to end the first conduction interval when a voltage across the capacitor (406) crosses a predetermined first voltage level, wherein controlling the predetermined first voltage level determines a power level provided to the gas discharge lamp (401).

IPC 8 full level

H03K 17/00 (2006.01); H05B 41/282 (2006.01); H05B 41/285 (2006.01); H05B 41/392 (2006.01)

CPC (source: EP)

H05B 41/2828 (2013.01); H05B 41/2856 (2013.01); H05B 41/3927 (2013.01)

Citation (applicant)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 2547176 A1 20130116

DOCDB simple family (application)

EP 11250662 A 20110715