Research Article
Electromagnetic Force and Mechanical Response of Turbo-Generator End Winding under Electromechanical Faults
Table 3
Comparison of vibration characteristics.
| | Normal | Eccentricity | RISC | Composite fault | Max stress and deformation | Coil position | Interphase | Interphase closest the min air gap | Interphase | Interphase closest the min air gap | Coil at the min air gap | Sn Dn | Sp > Sn Dp > Dn | Ss < Sn Ds < Dn | Ss < Sc < Sp Ds < Dc < Dp |
| Vibration | Frequency components | Even harmonics | Even harmonics | Even and weakly odd harmonics | Even and weakly odd harmonics | Amplitude of coils 60° apart | Equal | Unequal | Equal | Unequal | 2nd harmonic amplitude | An | Min air gap: Ap > An Max air gap: Ap < An | As < An | Min air gap: As < Ac < Ap Max air gap: Ac < min(As, Ap) < An |
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