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Magnetically-controlled Electronic Ballasts with Isolated Output: The Variable Transformer Solution

Perdigão, M. ; Gacio, D. Gacio ; Saraiva, E. S.

Magnetically-controlled Electronic Ballasts with Isolated Output: The Variable Transformer Solution, Proc IEEE International Symp. on Industrial Electronics - ISIE , Seoul, Korea, South, Vol. xx, pp. xx - xx, July, 2009.

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Abstract
New advances on magnetically-controlled electronic ballasts can grant the ability to dim the lamp and simultaneously guarantee output electrical isolation. By means of a variable transformer, whose model is presented, this new technique is developed and experimentally verified. In addition, a simple method for the large signal characterization of the transformer is described. A FH 14W/840 Osram lamp was chosen to validate this new technique and experimental results clearly show its adequate behaviour