Analysis of the Loss and Heat on Damper Bars in Large Tubular Hydro-Generator base on the 3D Electromagnetic-Temperature field Calculation

In order to research the losses and heat of damper bars thoroughly, a 3D moving electromagnetic field FE model of tubular hydro- generator and a 3D temperature field FE model of the rotor are built respectively. Furthermore, according to the different operating conditions, the compositive calculations about the losses and temperatures of the damper bars of a 36MW tubular hydro-generator are carried out, and the data are compared with the test. The results show that the computation precision is satisfied. Streszczenie. Badano straty i nagrzewanie w pretach tlumika hydrogeneratora wykorzystując 3D model elektromagnetyczny. Badano rozklad temperatury oraz pola elektromagnetycznego. (Analiza strat i nagrzewania w pretach tlumika turbogeneratora bazujące na obliczeniach 3D temperatury I pola elektromagnetycznego)