Igniter circuit for an hid lamp

Details Igniter circuit for an hid lamp Igniter circuit for an hid lamp

H - Electricity

05

B

H05B 41/288 (2006.01) H05B 41/38 (2006.01)

Patent

CA 2601664

An igniter circuit (10) for an HID lamp (11) has a DC input (VBUS) for coupling to a source of DC voltage, and an output (23, 24) for coupling to the HID lamp. A resonant ignition circuit (12) operating at a controlled resonant frequency is coupled to the DC input for producing successive bursts of voltage having a frequency equal to the resonant frequency and having an amplitude that increases with time. The resonant ignition circuit (12) feeds the bursts of voltage across the output of the igniter until an HID lamp coupled thereto reaches breakdown.

Selon l'invention, un circuit d'allumage (10) pour lampe DHI (11) comprend une entrée C:C. (VBUS) qui se raccorde à une source de tension en courant continu; et une sortie (23, 24) qui se raccorde à la lampe DHI. Un circuit d'allumage résonant (12) qui fonctionne à une fréquence de résonance régulée et est raccordé à l'entrée C:C. pour produire des salves de tension successives de fréquence égale à la fréquence de résonance et dont l'amplitude augmente au fil du temps. Le circuit d'allumage résonant (12) alimente les salves de tension aux bornes de la sortie de l'allumeur jusqu'à ce qu'une lampe DHI qui lui est raccordée tombe en panne.

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