Triac dimmable compact fluorescent lamp with low power factor

Details Triac dimmable compact fluorescent lamp with low power factor Triac dimmable compact fluorescent lamp with low power factor

H - Electricity

05

B

H05B 41/392 (2006.01) H05B 41/285 (2006.01)

Patent

CA 2257639

A triac dimmable compact fluorescent lamp having a low power factor. A power feedback circuit coupled between the input and output stages of the lamp ballast creates sufficient current demand to sustain triac conduction at low dim levels. The power fed back from the output stage to the input stage, which includes a voltage doubler, reflects the voltage across the lamp.

La présente invention concerne une lampe fluorescente compacte à gradateur à triac à facteur de puissance faible. Un circuit à contre-réaction de puissance couplé entre les étages d'entrée et de sortie du ballast de la lampe crée une demande de courant suffisante pour entretenir une conduction de triac à bas niveaux d'intensité. La contre-réaction de puissance de l'étage de sortie vers l'étage d'entrée, qui comprend un doubleur de tension, reflète la tension présente au niveau de la lampe.

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