Apparatus for supplying power from a ballast circuit to an...

H - Electricity – 05 – B

Patent

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Details

H05B 37/00 (2006.01) H05B 37/02 (2006.01)

Patent

CA 2251911

The present invention is directed to a power supply circuit (10) for controlling a load which, for example, includes both a gas-discharge lamp (14) and an auxiliary load (20). The power supply circuit (10) includes a ballast circuit (12) for limiting current supplied to the gas discharge lamp (14). The auxiliary load (20), such as an occupancy sensor, is connected to receive an alternating current signal from a transformer winding (17), inductor coil, or other suitable portion of the ballast circuit (12). The power supply circuit (10) includes a rectifier (18) for rectifying the alternating current signal to provide a stable, low-voltage direct current signal to drive the auxiliary load (20).

La présente invention se rapporte à un circuit d'alimentation en énergie (10) destiné à réguler une charge qui, par exemple, comporte à la fois une lampe à décharge gazeuse (14) et une charge auxiliaire (20). Ledit circuit d'alimentation en énergie (10) comprend un circuit à ballast (12) destiné à limiter le courant délivré à la lampe à décharge gazeuse (14). La charge auxiliaire (20), du type capteur de présence, est connecté de façon à recevoir un signal de courant alternatif en provenance d'un enroulement (17) de transformateur, d'une bobine d'induction ou de toute autre partie du circuit à ballast (12). Ledit circuit d'alimentation en énergie (10) comporte un redresseur (18) servant à redresser le signal de courant alternatif de façon à délivrer un signal stable de courant continu, basse-tension d'excitation de la charge auxiliaire (20).

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