Utilizing flux controllable pm electric machines for wind turbine applications
a technology of flux control and electric machines, applied in the direction of wind motors, electric generator control, control systems, etc., can solve the problems of added costs and complexity, physical large and not very efficien
Inactive Publication Date: 2013-12-12
RTX CORP
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Problems solved by technology
Utilizing a synchronous induction generator is simple; however, it is physically large and not very efficient.
The double wound induction generator is capable of increased efficiency; however, there are added costs and complexity involved.
The wound field synchronous generator is similar to the synchronous induction generator in that it is simple to use but physically large and not very efficient.
However, drawbacks to the conventional permanent magnet generator systems include: added complexity, added expense due to the costs of the supplementary high power rectifier and high power inverter, and reduced reliability due to the full power electronics.
Method used
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[0016]Referring now to the drawings, and with specific reference to FIG. 1, a wind turbine constructed in accordance with the teachings of the disclosure is generally referred to by reference numeral 10. While all components of the wind turbine are not shown or described, for several background purposes, the wind turbine 10 may include a vertically oriented tower 12, which has a stationary base 14 and body element 16. The stationary base 14 of the tower 12 is permanently situated on the ground G and therefore, the wind turbine 10 is structurally stable and cannot be moved. The body element 16 is attached to the stationary base 14 and extends upwards to a height at which the wind turbine 10 can optimally capture the kinetic energy of the wind. A nacelle 18 may be rotatably mounted on top of the body element 16 of the tower 12. A hub 20, with a plurality of blades 22 radially extending therefrom, may be mounted for rotation to the nacelle 18. Within the nacelle 18, a main shaft 24 may...
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A wind turbine is disclosed. The wind turbine comprises a tower with a nacelle mounted to the tower. A hub, with a plurality of blades extending therefrom, is rotatably mounted to the nacelle. A main shaft rotates with the hub, and at least one generator system is operatively connected to the main shaft. The generator system of the wind turbine comprises a permanent magnet generator. The permanent magnet generator comprises a rotor and a stator for generating a high frequency alternating current (HFAC) power output from the rotation of the main shaft, and a magnetic flux diverter circuit for modulating the output of the permanent magnet generator. The generator system may further comprise a power transformation circuit for transforming the HFAC power output into a low frequency alternating current power output.
Description
FIELD OF THE DISCLOSURE[0001]The present disclosure relates generally to wind turbines and, more particularly, to wind power generator systems which employ permanent magnet electric machines.BACKGROUND OF THE DISCLOSURE[0002]In recent years, wind turbines have been integrated into electric power generation systems to create electricity to support the needs of both industrial and residential applications. These wind turbines capture the kinetic energy of the wind and convert it into electricity. A typical wind turbine includes a set of two or three large blades mounted to a hub. Together, the blades and hub are referred to as the rotor. The rotor is connected to a main shaft, which in turn, is connected to a generator. When the wind causes the rotor to rotate, the kinetic energy of the wind is captured and converted into rotational energy. The rotational energy of the rotor is translated along the main shaft to the generator, which then converts the rotational energy into electricity...
Claims
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IPC IPC(8): F03D9/00
CPCF03D9/003F03D9/25F03D9/255Y02E10/72
Inventor HIMMELMANN, RICHARD A.
Owner RTX CORP