Electronic ballast with phase dimmer detection

H - Electricity – 05 – B

Patent

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Details

H05B 41/392 (2006.01) H05B 41/282 (2006.01)

Patent

CA 2605169

The invention relates to an electronic ballast comprising a converter which is used to operate a discharge lamp, for example, a low pressure discharge lamp, for selectively operating, in a direct manner, the supply network or a phase section dimmer. Jumps in the supply voltage are decoupled by a differential which is connected between at least one of the network lines and the reference potential of the ballast and transmitted to a control of the ballast, such that the control of the converter can distinguish between the operation on the phase section dimmer and on the network supply.

L'invention concerne un ballast électronique comportant un convertisseur servant à faire fonctionner une lampe décharge, par exemple une lampe à décharge basse pression, destinée à fonctionner soit directement sur le réseau d'alimentation soit sur un gradateur à angle de phase. Des sauts de tension d'alimentation sont découplés par l'intermédiaire d'un différenciateur connecté entre au moins une des lignes d'alimentation et le potentiel de référence du ballast, puis transmis à une commande du ballast, de sorte que la commande du convertisseur puisse effectuer une distinction entre le fonctionnement sur le gradateur à angle de phase et le fonctionnement sur l'alimentation du réseau.

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