Electric power converter

Details Electric power converter Electric power converter

2008-01-22

2008-01-22

Laxton, Gary L (Department: 2838)

Electric power conversion systems

Current conversion

Including an a.c.-d.c.-a.c. converter

C363S037000

Reexamination Certificate

active

07321500

ABSTRACT:
A voltage source converter for high power application containing a plurality of valves, each valve containing a plurality of extinguishable semiconducting elements, and a valve control unit containing a computer and a pulse-width modulator providing an executing control signal for controlling the semiconducting elements. The valve control unit includes a first control containing a first pulse-width modulator for providing a first pulse-width modulation signal, a second control containing a second pulse-width modulator for providing, a second pulse-width modulation signal, a mode detector, and a selector connected to the first and second pulse-width modulator for selecting in dependence of the mode detector the executing pulse-width modulation signal.

REFERENCES:
patent: 4309749 (1982-01-01), Weibelzahl et al.
patent: 5657216 (1997-08-01), Kaura
patent: 6400585 (2002-06-01), Jiang-Hafner
patent: 6643154 (2003-11-01), Hagman
patent: 7206211 (2007-04-01), Blidberg et al.

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