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1. WO2013007727 - ELECTRONIC BALLAST FOR A LAMP

Publication Number WO/2013/007727
Publication Date 17.01.2013
International Application No. PCT/EP2012/063505
International Filing Date 10.07.2012
IPC
H05B 41/292 2006.01
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
41Circuit arrangements or apparatus for igniting or operating discharge lamps
14Circuit arrangements
26in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
28using static converters
288with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
292Arrangements for protecting lamps or circuits against abnormal operating conditions
H05B 41/36 2006.01
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
41Circuit arrangements or apparatus for igniting or operating discharge lamps
14Circuit arrangements
36Controlling
H05B 41/38 2006.01
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
41Circuit arrangements or apparatus for igniting or operating discharge lamps
14Circuit arrangements
36Controlling
38Controlling the intensity of light
CPC
H05B 41/2925
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
41Circuit arrangements or apparatus for igniting or operating discharge lamps
14Circuit arrangements
26in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
28using static converters
288with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
292Arrangements for protecting lamps or circuits against abnormal operating conditions
2921for protecting the circuit against abnormal operating conditions
2925against abnormal lamp operating conditions
H05B 41/36
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
41Circuit arrangements or apparatus for igniting or operating discharge lamps
14Circuit arrangements
36Controlling
H05B 41/382
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
41Circuit arrangements or apparatus for igniting or operating discharge lamps
14Circuit arrangements
36Controlling
38Controlling the intensity of light
382during the transitional start-up phase
Applicants
  • TRIDONIC GMBH & CO KG [AT]/[AT] (AllExceptUS)
  • KELLY, Jamie [GB]/[GB] (UsOnly)
  • MAKWANA, Deepak [IN]/[GB] (UsOnly)
  • MCDERMOTT, Kevin [GB]/[GB] (UsOnly)
  • DALBY, Paul [GB]/[GB] (UsOnly)
  • BELL, Wayne [GB]/[GB] (UsOnly)
Inventors
  • KELLY, Jamie
  • MAKWANA, Deepak
  • MCDERMOTT, Kevin
  • DALBY, Paul
  • BELL, Wayne
Agents
  • FOSTER, Mark
Priority Data
1111860.111.07.2011GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ELECTRONIC BALLAST FOR A LAMP
(FR) BALLAST ÉLECTRONIQUE POUR LAMPE
Abstract
(EN)
Electronic ballast for a lamp, such as a gas discharge lamp, preferably for a fluorescent lamp (LA), having an inverter, connected with a d.c. voltage source (Vbus), and a load circuit, which has the lamp (LA) and a series resonance circuit, connected to the inverter, wherein the inverter is formed by means of two switches (Q1, Q2) arranged in a half-bridge arrangement, which switches are so alternatingly controllable by a control circuit (1) during an ignition phase that their switch-on time (Ton) is increased to reduce the control frequency, characterised in that the control circuit (1) in the ignition phase monitors an output parameter of the half-bridge to determine if ignition has occurred by evaluation of an output parameter or a half bridge parameter after a given time. The control circuit (1) may monitor a current or voltage, or a frequency.
(FR)
On décrit un ballast électronique pour lampe, telle qu'une lampe à décharge gazeuse, de préférence une lampe fluorescente (LA), qui comprend un inverseur raccordé à une source de tension (Vbus) en courant continu; et un circuit de charge comportant la lampe (LA) et un circuit de résonance en série raccordé à l'inverseur. L'inverseur est formé de deux commutateurs (Q1, Q2) disposés en demi-pont et pouvant être commandés de manière alternée par un circuit de commande (1), au cours d'une phase d'allumage, de façon à augmenter leur temps de mise en marche (Ton) et à réduire ainsi la fréquence de commande. Le ballast se caractérise en ce que, dans les phases d'allumage, le circuit de commande (1) surveille un paramètre de sortie du demi-pont pour déterminer l'éventualité de l'allumage, par l'évaluation d'un paramètre de sortie ou d'un paramètre du demi-pont après un temps donné. Le circuit de commande (1) peut surveiller un courant ou une tension, ou une fréquence.
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