Patent · US Active

Circuit arrangement and method for operating a high pressure discharge lamp

US8760069B2 · kind B2 · utility

1Cited by

7References

16Claims

0Family size

Assignee

OSRAM GmbH · DE

Inventors

Alois Braun · Neubukow, DE
Walter Limmer · Birkenfeld, DE
Maximilian Schmidl · Pullach, DE

Key dates

Filing date	Oct 23, 2008
Grant date	Jun 24, 2014
Priority date	—
Expiry date	Aug 6, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH05B41/2925
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method for operating a high pressure discharge lamp, with the high pressure discharge lamp being operated by a current inverter with a square wave lamp current having a positive phase with positive current flow and a negative phase with negative current flow, and with the current inverter being controlled by a control arrangement wherein the method comprises the steps of measuring a value for the positive current flow representing the lamp wattage or the square wave lamp current, measuring a value for the negative current flow representing the lamp wattage or the square wave lamp current; calculating a predetermined setpoint value in each case from a guide variable of a lamp wattage or of the square wave lamp current and the measured value for the phase with positive current flow; calculating a predetermined setpoint value in each case from a guide variable of a lamp wattage or of the square wave lamp current and the measured value for the phase with negative current flow; and outputting the two predetermined setpoint values to the current inverter.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.