Electric lamp and discharge devices: systems – Current and/or voltage regulation
Reexamination Certificate
2007-03-05
2011-11-08
Philogene, Haiss (Department: 2821)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
C315S219000, C315S225000, C315S224000, C315S2090SC
Reexamination Certificate
active
08054003
ABSTRACT:
The present invention relates to an electronic ballast for operating a lamp (L) which has a Class E converter (T1, L1). When a lamp (L) is connected, the output current of the Class E converter (T1, L1) once a switching element (T1) of the Class E converter (T1, L1) has been switched off has a first and a second half-cycle of opposite polarity. The electronic ballast has a measurement apparatus for measuring the output current and a regulating apparatus for adjusting a switch-on time of the switching element. In this case, the measurement apparatus is designed to determine a first output current value of the first half-cycle and a second output current value of the second half-cycle, wherein the regulating apparatus for adjusting the switch-on time is fed a control variable based on the discrepancy between the two output current values.
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OSRAM AG
Philogene Haiss
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