Electronic ballast with reactive current oscillation reduction

Details Electronic ballast with reactive current oscillation reduction Electronic ballast with reactive current oscillation reduction

H - Electricity

05

B

H05B 41/392 (2006.01) H05B 41/28 (2006.01)

Patent

CA 2605217

The invention relates to an electronic ballast presenting an input capacitor (C) and comprising and step-up chopper (LH, DH, SH, CH) for operating a load, for example a discharge lamp(CFL), on a phase control dimmer (DIM) having an integrated or parasite inductance (L). According to said invention, excessive voltage after connection with a phase control can be reduced by adjusting currents by means of the step-up chopper (LH, DH, SH, CH).

L'invention concerne un ballast électronique présentant un condensateur d'entrée (C) et comprenant un hacheur élévateur (LH, DH, SH, CH) pour le fonctionnement d'une lampe à décharge (CFL) sur un gradateur à commande de phase (DIM) présentant une inductance intégrée ou parasite (L). Selon l'invention, les surélévations de tension suivant le découpage en début de phase sont réduites par réglage du courant au moyen du hacheur élévateur (LH, DH, SH, CH).

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