Synchronous generator, especially for wind turbines
US8860272B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 2011 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | May 27, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/72
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A synchronous generator is provided. The generator includes a rotor, which rotates around a machine axis and is concentrically surrounded by a stator with a stator winding. A plurality of permanent magnets and pole pieces are alternatingly arranged at the rim of the rotor with the permanent magnets being oriented in an essentially tangential direction. Torque and power characteristic of the generator are improved by alternating pole pieces and pairs of permanent magnets. The permanent magnets each have a rectangular cross section in the axial direction, the pole pieces each have a symmetric trapezoidal cross section in the axial direction with the symmetry plane of the trapezoid extending radially through the machine axis and the longer parallel side lying outside. The two permanent magnets of each pair of permanent magnets are separated from each other by an intermediate wedge, which corresponds with its cross section to the trapezoidal pole pieces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.