Segmented permanent magnet ring generator with active damping of axial oscillations

This paper presents the design and control structure of a synchronous generator in ring form. The analysed generator is designed in order to test the control structure of a light-weight 10 MW generator for wind turbines. A segmented stator structure with distributed control allows control of the current of single stator segments which facilitates damping of axial displacement due to varying wind speeds by controlling axial forces. The layout process of the generator, its distributed control and the damping control are presented in this paper.