Electric arrangement for regulating the luminous intensity of at

Details Electric arrangement for regulating the luminous intensity of at Electric arrangement for regulating the luminous intensity of at

1986-01-21

1987-12-08

Dixon, Harold

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

315226, 315278, 315282, 315DIG4, 315DIG7, H05B 3702

Patent

active

047120452

ABSTRACT:
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.

REFERENCES:
patent: 4017785 (1977-04-01), Perper
patent: 4370600 (1983-01-01), Zansky
patent: 4376969 (1983-03-01), Bedard
patent: 4525648 (1985-06-01), DeBijl et al.

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