Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor
Reexamination Certificate
2007-02-05
2011-12-27
Barnie, Rexford (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific voltage responsive fault sensor
Reexamination Certificate
active
08085519
ABSTRACT:
The invention relates to a circuit arrangement for providing an operating DC voltage from a mains voltage, more particularly to operating circuits comprising a clocked electronic converter. Such operating circuits are preferably used for lamps or other light sources. The present invention protects such circuit arrangements from transient mains overvoltages. As soon as a mains overvoltage occurs a diverter switch Th connects the voltage-sensitive switch S11of the electronic converter to a storage capacitor C12.
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Petersen et al., “Reduction of Voltage Stresses in Buck-Boost-Type Power Factor Correctors Operating in Boundary Conductor Mode,” APEC 2003 IEEE Appl. Power Elec. Conf., vol. 1, Conf. 18 pp. 664-670 (Feb. 9, 2003).
Barnie Rexford
Brooks Angela
OSRAM AG
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