Electric arrangement for regulating the luminous intensity of at least one discharge lamp.

摘要

An electric arrangement for regulating the luminous intensity of at least one discharge lamp (15), this arrangement comprising an electric circuit having a first winding (110) arranged to surround a core (111) of magnetizable material, this winding (110) being included in a circuit forming part of a DC/AC converter for the high-frequency supply of the discharge lamp, the core (111) further being provided with a second winding (112) and a third winding (118), which third winding (118) is connected to a control device forming part of the converter, the third winding (118) being magnetically coupled to the first winding (110) and a series-combination of a non-capacitive variable impedance (115) and a diode (113) being included between the ends of the second winding (112).