| 摘要 |
A method of controlling an electric generator is provided. While rotating the electric generator at a known rotating speed, a cogging torque signal representative of a cogging torque of the electric generator such as torque, vibration or acoustic noise is measured. Then a compensating current having a predetermined current characteristic is injected into the electric generator. This is repeated for a plurality of different predetermined current characteristics until the measured cogging torque signal meets a predetermined condition. One of the predetermined current characteristics is selected as a base operating current characteristic. The electric generator will be operated injecting an operating compensating current having an operating current characteristic derived from the base operating current characteristic in accordance with an operating state of the electric generator. Further aspects of the invention relate to an electric generator operable according to the invention and a wind turbine comprising such an electric generator. |
