Research of dampher system damage physical processes of synchronous machines rotor

The physical processes in the damper system of rotor with appearance a static eccentricity for two types salient-pole synchronous machines - capsule hydrogenator SGK 538/160-70M capacity 22 MW and generator 500 kW were investigated by means mathematical modeling. A field model has been developed that takes into account combined action three fields different nature: electromagnetic, temperature thermomechanical stresses, makes it possible to evaluate heating three-dimensional distribution stresses structural elements machine. These cause gradual destruction structure system. It is proved primary degradation damage damping an open-pole machine uneven induced currents rods at poles rotor, which occurs when works asynchronously or eccentricity. largest heat occur located edges pole pieces, while central are heated significantly less. This asymmetric leads significant depend on magnitude slippery asynchronous mode. total influenced not only axially directed forces but also transverse end short-circuiting elements. At considerable eccentricities there inadmissibly big breaking break cores face rotor. According results analysis, determined recommendations its improvement given.