Magnetic Vibrations in A-C Generator Stators [includes discussion]

To prevent excessive magnetic vibrations in a-c generators, it is necessary to provide an adequate core mounting and to avoid resonance in the associated parts. When the frames are too complex to permit accurate analysis, the use of scale models proves valuable in obtaining the dynamic characteristics. On large machines, which cannot be tested in the manufacturer´s plants, simple analyses and tests may be used advantageously for determining the correction of any problem that may arise in service.