Vibration-free suspension of a generator stator core

摘要

A stator core 100 has natural modes of vibration, including a second mode and a third mode which cause deformation of the outer periphery 200 of the stator core as shown by ellipses 202, 204. The second and third modes (fig. 1) each have four loops and four nodes displaced 45 degrees between the modes. The core 100 is held by yokes 208. Each yokes 208 is connected to the core at connection points 210a, and 210b located at adjacent loops of one of the second and third vibration modes. A non-rigid connection 212 connects each yoke 208 to the foundation 206. By this arrangement, radial deflections of the stator core 100 at the respective connection points are transferred into a rocking movement of the yoke around the non-rigid connection 212. Thereby, vibrations transferred to the foundation 206 are considerably reduced during operation.