Electricity: single generator systems – Automatic control of generator or driving means – Speed or frequency of generator
Reexamination Certificate
2008-02-14
2008-11-18
Ponomarenko, Nicholas (Department: 2834)
Electricity: single generator systems
Automatic control of generator or driving means
Speed or frequency of generator
C322S045000, C290S044000
Reexamination Certificate
active
07453242
ABSTRACT:
A power generation apparatus and method includes an AC energization synchronous generator, a switching device for connecting to a network disposed on a stator side of the AC energization synchronous generator, an energizing device for applying a variable frequency AC to a secondary winding of the AC energization synchronous generator, and a first voltage detection unit for detecting a voltage of the switching device on the stator side. A rotational frequency of the AC energization synchronous generator is estimated or calculated based on a frequency of a stator side voltage of the switching device, while the switching device is open.
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US 7,355,295, 04/2008, Rivas et al. (withdrawn)
Futami Motoo
Ichinose Masaya
Imaie Kazuhiro
Matsutake Mitsugu
Oohara Shinya
Antonelli, Terry Stout & Kraus, LLP.
Hitachi , Ltd.
Ponomarenko Nicholas
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