Electricity: single generator systems – Generator control – With excitation winding and/or circuit control
Reexamination Certificate
2011-03-29
2011-03-29
Gon, J (Department: 2839)
Electricity: single generator systems
Generator control
With excitation winding and/or circuit control
Reexamination Certificate
active
07915869
ABSTRACT:
When driven by a variable speed prime mover, a generator system provides relatively constant frequency AC power by independently controlling the main rotor flux rotational speed. The generator system includes an exciter stator that induces current in the exciter rotor windings at a desired frequency and phasing. The exciter rotor windings are electrically connected to and located in a common core as the main rotor windings to provide two-phase excitation current to the main rotor windings. The exciter stator winding is also located in a common core as the main generator stator windings. Excitation is supplied to the exciter stator from an exciter controller, which controls the frequency and phasing of the exciter excitation, based on the rotational speed and rotor position of the generator, to maintain a constant output frequency. The exciter frequency control function of the exciter controller may be eliminated when the generator system is driven by a constant speed prime mover or when a narrow band variable frequency output is required.
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Anghel Cristian
Scherzinger William
Xu Ming
Caglar Esq. Oral
Gon J
Honeywell International , Inc.
Mohandesi Iraj A
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