Prime-mover dynamo plants – Electric control – Fluid-current motors
Reexamination Certificate
2010-06-29
2011-10-18
Ponomarenko, Nicholas (Department: 2839)
Prime-mover dynamo plants
Electric control
Fluid-current motors
C322S059000
Reexamination Certificate
active
08039982
ABSTRACT:
The disclosure concerns a method for operating a wind turbine having a generator, the generator having for each phase a plurality of coils, wherein the plurality of coils of each phase includes at least one group of coils including at least two coils, the group of coils including at least two subgroups including at least one coil, wherein the generator has a first state in which the coils of the group of coils are electrically connected in series, and, the generator has a second state in which the at least two subgroups are switched electrically in parallel; the method including: changing the state of the generator. Further, the disclosure concerns a coil arrangement for an electric machine for a wind turbine, the electrical machine having for each phase a plurality of coils, wherein the plurality of coils of each phase includes at least one group of coils including at least two coils, the group of coils including at least two subgroups including at least one coil, wherein the electrical machine has a first state in which the coils of the group of coils are electrically connected in series, and, the electrical machine has a second state in which the at least two subgroups are switched electrically in parallel.
REFERENCES:
patent: 7227340 (2007-06-01), Chen
patent: 7348764 (2008-03-01), Stewart et al.
patent: 7656135 (2010-02-01), Schram et al.
General Electric Company
Global Patent Operation
Ponomarenko Nicholas
Zhang Douglas D.
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