Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Reexamination Certificate
2011-04-05
2011-04-05
Laxton, Gary L (Department: 2838)
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
C363S037000
Reexamination Certificate
active
07920395
ABSTRACT:
A pulse width modulation method has the steps of operating a second instruction signal so that each of the differences between two or three arbitrary instruction signals in three first instruction signals may become more than the predetermined value, and modulating in pulse width based on the second instruction signal.
REFERENCES:
patent: 6704212 (2004-03-01), Furukawa et al.
patent: 2002/0093391 (2002-07-01), Ishida et al.
patent: 2001-327173 (2001-11-01), None
patent: 2002-095263 (2002-03-01), None
patent: 2002-119062 (2002-04-01), None
Ishida Seiji
Nakamura Atsuhiko
Crowell & Moring LLP
Hitachi , Ltd.
Hitachi Industrial Equipment Systems Co. Ltd.
Laxton Gary L
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