| Turbo-gnerators are different from normal rotating machines. They not only endure mechanical vibrations caused by mechanical forces, but also bear electro- magnetic vibrations caused by large electromagnetic forces. As the unit capacity increases, the excess stator and winding vibration faults caused by electro- magnetic forces happen frequently. Based on the introduction of the turbo- generator structure and the electromagnetic vibration, the calculating methods of the rotor electromagnetic pulls under normal condition and tortor interturn short circuit are analyzed. Then the rotor interturn short circuit fault in a power plant is taken as an example to analyze the stator and rotor vibration characteristics. Also, the fault analysis method according to the vibration characters is put forward, and the electromagnetic forces act on the end winding and the winding inside the slots are studied. Finally, the monitoring system for the end winding based on LabVIEW8.0 is developed. This system adopts FOA1660 fibre optic accelerometer and RBH8351 grabbing card. Its modeuls include signal pickup and pre-processing, real time parameter setting, time-domain and frequency-domain vibration signal analysis, vibration trend analysis, help module and so on.
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