Electricity: motive power systems – Plural diverse motor controls
Reexamination Certificate
2011-04-05
2011-04-05
Ip, Paul (Department: 2837)
Electricity: motive power systems
Plural diverse motor controls
C318S609000, C318S722000, C318S800000, C322S027000
Reexamination Certificate
active
07919941
ABSTRACT:
A semiconductor power converter includes a power converter for converting direct current to three-phase alternating current or vice versa; a means for detecting a current in an alternating current side of the power converter; a means for providing a current reference in the alternating current side of the power converter; a current controller for calculating a voltage reference in the alternating current side of the power converter to match the current reference and a value of the detected current; and a pulse width modulation means for controlling the power converter through pulse width modulation based on the voltage reference, wherein the current reference is used in place of the value of the detected current for at least one phase current among three phase currents in the alternating current side.
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Aoyagi Shigehisa
Iwaji Yoshitaka
Li Donsheng
Sakamoto Kiyoshi
Tobari Kazuaki
Antonelli, Terry Stout & Kraus, LLP.
Hitachi , Ltd.
Hitachi Car Engineering Co. Ltd.
Hitachi Industrial Equipment Systems Co. Ltd.
Ip Paul
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