Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Reexamination Certificate
2006-09-28
2008-08-19
Vu, Bao Q (Department: 2838)
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
C363S040000, C363S071000
Reexamination Certificate
active
07414866
ABSTRACT:
A method for smoothing input current to a power delivery system having regeneration capability. The method comprises evaluating input current to an input converter of the power delivery system for a first fundamental cycle, and shifting a window relative to a waveform of an input voltage after the first fundamental cycle. The method also comprises evaluating input current to the input converter for a second fundamental cycle, and determining whether the input current of the second fundamental cycle is smoother than the input current of the first fundamental cycle. The method further comprises shifting the window in the same direction the window was shifted after the first fundamental cycle if the input current of the second fundamental cycle is smoother than the input current of the first fundamental cycle, and shifting the window in the opposite direction the window was shifted after the first fundamental cycle if the input current of the second fundamental cycle is not smoother than the input current of the first fundamental cycle.
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Siemens Energy & Automation Inc.
Vu Bao Q
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