Impact of Different Static Air-Gap Eccentricity Forms on Rotor UMP of Turbogenerator

Figure 7

Rotor UMP caused by overall elliptical deformation of stator core: ((a) and (b)) time domain waves in and direction, respectively, and ((c) and (d)) UMP spectra in and direction, respectively, under normal condition, 12.5% stator core ellipse, 25% stator core ellipse, and 37.5 stator core ellipse (from left to right).

(a)

(b)

(c)

(d)