Patent ID: 6788010
Filing Date: 2004-09-07
Classification: H05B,Y02B

Abstract:
An operating appliance for operation of high-pressure discharge lamps comprising:a pulsed power supply (L2, C2, T1, D1, 1), which supplies a power and provides an operating current for a high-pressure discharge lamp (Lp), a polarity reversal network (2) via which the high-pressure discharge lamp (Lp) is coupled to the pulsed power supply, having a polarity reversal signal input at which a polarity reversal signal is fed in (10), which controls polarity reversal of an operating voltage for the high-pressure discharge lamp (Lp), a control device (4) which provides a switching signal, a control input for the pulsed power supply (L2, C2, T1, D1, 1), at which a manipulated variable is fed in, with aid of which the power which is provided by the pulsed power supply (L2, C2, T1, D1, 1) is varied, a measurement device (R1) for providing a control variable, which is a measure of the operating current which the pulsed power supply (L2, C2, T1, D1, 1) emits, a device (5) for providing a set variable which is a measure of a current set value, a regulating device (6, 8) into which the set variable and the control variable are fed and which emits a manipulated variable as a function of the difference between the set variable and the control variable, characterized in that the control device (4) contains means which provide a reduction value by which the set variable or the manipulated variable is reduced in synchronism with the switching signal during a reduction.