Supply coupling of a fluorescent lamp

Details Supply coupling of a fluorescent lamp Supply coupling of a fluorescent lamp

H - Electricity

05

B

H05B 41/298 (2006.01)

Patent

CA 2332347

The invention relates to a supply coupling of a fluorescent lamp used for supervising the operation and condition of a lamp circuit, particularly a supply coupling in connection with an electronic coupling device wherein the power required by the lamp circuit is supplied to the coupling by a transformer. The supply coupling comprises a supply transformer (T1), a resonance circuit comprising the secondary coil (N2) of the transformer (T1) and a capacitor (C1) connected in parallel with the secondary coil, and a fluorescent tube (Lamp1) connected in parallel with the resonance circuit and comprising fluorescent cathodes (F1, F2). The coupling further comprises a direct-current supply (DC) arranged to supply direct current (I DC) through a circuit comprising a first fluorescent cathode (F1) of the fluorescent tube, a secondary coil (N2) of the supply transformer (T1), a second fluorescent cathode (F2) of the fluorescent tube (Lamp1) and an indicator circuit (A) arranged to detect the presence of said direct current (I DC) and to generate a signal indicating that presence to be used for controlling a coupling device of the fluorescent lamp.

L'invention a trait à un couplage d'alimentation de lampe fluorescente utilisée pour surveiller le fonctionnement et l'état d'un circuit de lampe, notamment un couplage d'alimentation combiné à un dispositif de couplage électronique dans lequel la puissance requise par le circuit de la lampe est fournie au couplage par un transformateur. Le couplage d'alimentation comprend un transformateur d'alimentation (T1), un circuit de résonance comprenant la bobine secondaire (N2) du transformateur (T1) ainsi qu'un condensateur (C1) connecté en parallèle à la bobine secondaire, et un tube fluorescent (Lampe 1) connecté en parallèle au circuit de résonance et comprenant des cathodes fluorescentes (F1, F2). Le couplage comprend également une alimentation en courant continu (CC) agencée pour fournir du courant continu (ICC) dans un circuit comprenant une première cathode fluorescente (F1) du tube fluorescent, une bobine secondaire (N2) du transformateur d'alimentation (T1), une seconde cathode fluorescente (F2) du tube fluorescent (Lampe 1) et un circuit indicateur (A) agencé pour détecter la présence dudit courant continu (ICC) et pour produire un signal indiquant cette présence à utiliser pour commander un dispositif de couplage de la lampe fluorescente.

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