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). The arrangement comprises an electric circuit having a first winding (110) arranged to surround a core (111) of magnetizable material. The winding (110) is included in a circuit forming part of a DC/AC converter for the supply of high-frequency energy to the discharge lamp. The core (111) is further provided with a second winding (112) and a third winding (118). The third winding is connected to a control device forming part of the converter. The third winding is magnetically coupled to the first winding. A series-combination of a non-capacitive variable impedance (115) and a diode (113) is connected between the ends of the second winding.