Electricity: motive power systems – Synchronous motor systems
Reexamination Certificate
2007-12-25
2007-12-25
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
C318S705000, C318S718000, C318S254100
Reexamination Certificate
active
11259367
ABSTRACT:
A control system for a synchronous machine including a converter for converting DC voltage to AC voltage or AC voltage to DC voltage. The synchronous machine is driven by the converter. The control system further includes a magnetic pole position presuming device for performing a presuming operation to presume a magnetic pole position of the synchronous machine based on high-frequency components of a voltage applied to the synchronous machine and a current flowing into the synchronous machine, and a control device for controlling the converter based on the magnetic pole position presumed by the magnetic pole position presuming device. The control device controls the converter so as to contain significant high-frequency components in the voltage or the current used in the presuming operation when a mean voltage or a mean current output from the converter is spatially in a region close to a straight line containing starting and ending points of non-zero voltage vector output from the converter.
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Maekawa Katsumi
Onda Shouji
Suzuki Kentaro
Yasui Kazuya
Yuuki Kazuaki
Colon Santana Eduardo
Donovan Lincoln
Foley & Lardner LLP
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