Electric power conversion systems – Current conversion – Using semiconductor-type converter
Reexamination Certificate
2007-05-17
2009-02-10
Han, Jessica (Department: 2838)
Electric power conversion systems
Current conversion
Using semiconductor-type converter
C363S041000
Reexamination Certificate
active
07489533
ABSTRACT:
An inverter providing power to a load, the inverter receiving a direct current (DC) input. A plurality of switches included in the inverter are controlled by a plurality of control signals to generate an alternating current (AC) output in response to the DC input. A zero crossing of the AC output current provided by the plurality of switches is detected, and the controlling of the plurality of switches is delayed in response to the zero crossing. The amount of delay is adjusted responsive to a change in the DC input to effectively maintain a constant switching frequency of the inverter. The delayed AC output current of the plurality of switches may be filtered to provide power to the load.
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McDonald Brent A.
Price Erin L.
Young Chris
Dell Products L.P.
Han Jessica
Haynes and Boone LLP
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