Circuit arrangement for operating a high-pressure sodium...

Details Circuit arrangement for operating a high-pressure sodium... Circuit arrangement for operating a high-pressure sodium...

H - Electricity

05

B

315/41, 315/44

H05B 41/392 (2006.01)

Patent

CA 1266879

ABSTRACT Circuit arrangement for operating a high pressure sodium discharge lamp. The invention relates to a circuit arrangement suitable for operating at a supply voltage Vn a high-pressure sodium discharge lamp (4) having a lamp voltage V1a in conjunction with a current limiter circuit (3) and a first controlled semiconductor switching element (1). According to the invention, the circuit arrangement comprises - a first part for comparing a proportional part of the lamp voltage V1a with a reference voltage Vr and - a second part for comparing a proportional part of the supply voltage Vn with the resultant of the first comparison. With the circuit arrangement, it is possible to operate the lamp in such a manner that the lamp voltage V1a is substantially constant.

533694

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