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Magnetically-controlled dimming technique with isolated output

Perdigão, M. ; Saraiva, E. S.

Measurement: Journal of the International Measurement Confederation Vol. 45, Nº 14, pp. 756 - 758, July, 2009.

ISSN (print): 0263-2241
ISSN (online):

Scimago Journal Ranking: 0,37 (in 2009)

Digital Object Identifier: 10.1049/el.2009.0098

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, the model of which is presented, this new technique is developed and experimentally verified. In addition, a simple method for the large signal characterisation of the transformer is described. An FH 14W/840 Osram lamp was chosen to validate this new technique and experimental results clearly show its adequate behaviour.