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| Number | Title | Issue Date |
| 7802412 | Method of constructing large towers for wind turbines In order to transport large size windmill towers, the invention suggests a steel tower (1) for a windmill, comprising a number of cylindrical or tapered tower sections (2), at least the wider sections (2) of which being subdivided into two or mo... | 09/28/2010 |
| 7156586 | Wind turbine with floating foundation A floating foundation for wind turbines is disclosed, where the foundation essentially comprises at least three submerged buoyancy bodies connected to the lower end of the tower of the wind turbine at a common node member situated well above the surface of the sea. ... | 01/02/2007 |
| 7068015 | Wind power plant having magnetic field adjustment according to rotation speed A wind power plant where the driving shaft communicates with a synchronous generator (3) optionally through a gear (2) and with a transformer, if any, communicating through an AC/DC inverter 7 with an HVDC transmission cable 9. The synchr... | 06/27/2006 |
| 7015595 | Variable speed wind turbine having a passive grid side rectifier with scalar power control and dependent pitch control A variable speed wind turbine having a passive grid side rectifier using scalar power control and dependent pitch control is disclosed. The variable speed turbine may include an electrical generator to provide power for a power grid and a power conversion system cou... | 03/21/2006 |
| 6933625 | Variable speed wind turbine having a passive grid side rectifier with scalar power control and dependent pitch control A variable speed wind turbine having a passive grid side rectifier using scalar power control and dependent pitch control is disclosed. The variable speed turbine may include an electrical generator to provide power for a power grid and a power conversion system cou... | 08/23/2005 |
| 6872049 | Wind turbine comprising a planetary gear A wind turbine with a rotor, a nacelle and a tower. The nacelle comprises a planetary gear (4) with a planetary holder (5), on which the hub (6) of the rotor is rigidly secured, and which can be connected to the shaft of an electric generator. T... | 03/29/2005 |
| 6856038 | Variable speed wind turbine having a matrix converter A variable speed wind turbine is disclosed comprising a turbine rotor that drives a doubly-fed induction generator, a matrix converter which converts variable frequency output into constant frequency output, and a control unit and a protection circuit for the matrix... | 02/15/2005 |
| 6856041 | Variable speed wind turbine having a passive grid side rectifier with scalar power control and dependent pitch A variable speed wind turbine having a passive grid side rectifier using scalar power control and dependent pitch control is disclosed. The variable speed turbine may include an electrical generator to provide power for a power grid and a power conversion system cou... | 02/15/2005 |
| 6856040 | Variable speed wind turbine having a passive grid side rectifier with scalar power control and dependent pitch control A variable speed wind turbine having a passive grid side rectifier using scalar power control and dependent pitch control is disclosed. The variable speed turbine may include an electrical generator to provide power for a power grid and a power conversion system cou... | 02/15/2005 |
| 6853094 | Variable speed wind turbine having a passive grid side rectifier with scalar power control and dependent pitch control A variable speed wind turbine having a passive grid side rectifier using scalar power control and dependent pitch control is disclosed. The variable speed turbine may include an electrical generator to provide power for a power grid and a power conversion system cou... | 02/08/2005 |
| 6810749 | Fibre-optical strain gauge and method for the production of said strain gauge The fibre-optical strain gauge comprises a mechanical construction (1) providing a strain-dependent relative movement of oppositely positioned, spaced apart first and second optical fibre ends in a direction substantially perpendicular to the axial direction ... | 11/02/2004 |
| 6566764 | Variable speed wind turbine having a matrix converter A variable speed wind turbine is disclosed comprising a turbine rotor that drives a doubly-fed induction generator, a matrix converter which converts variable frequency output into constant frequency output, and a control unit and a protection circuit for... | 05/20/2003 |
