@article{article_262984, title={Estimating forces in mixed eccentricities motion from purely dynamic eccentric rotor centre motion in a hydropower generator and their validation against EM simulations}, journal={Balkan Journal of Electrical and Computer Engineering}, volume={3}, year={2015}, DOI={10.17694/bajece.76372}, author={Calleecharan, Yogeshwarsing and Jauregui, Ricardo and Aidanpää, Jan-olov}, abstract={<span>Electromagnetic analysis of hydropower generators is common practice but there is little emphasis on studying the effect of <br /> <span>rotor whirling in the analysis. This paper demonstrates the use of <br /> <span>the unbalanced magnetic pull (UMP) curves based on purely dynamic <br /> <span>eccentricity motion for a wide range of whirling frequencies in the <br /> <span>prediction of the steady state UMP in the case of mixed eccentricities <br /> <span>motion. The latter motion type is more realistic in practice. Actual <br /> <span>electromagnetic (EM) simulations are also carried out for these mixed <br /> <span>eccentricities motion cases in order to verify the proposed method. Good <br /> <span>agreement between the UMP from the actual EM simulations and the <br /> <span>UMP predictions are made when low eccentricities exist. The proposed <br /> <span>method is thus very useful since firstly, very few EM software packages <br /> <span>can handle mixed eccentricities motion and secondly, since actual EM <br /> <span>simulations of intricate rotor centre motion are time-consuming, the <br /> <span>proposed method is a big time saver. A modified feature selective validation <br /> <span>(FSV) method, the FSV-UPC, is also applied to assess the similarities and <br /> <span>the differences in the force computations. </span> </span> </span> </span> </span> </span> </span> </span> </span> </span> </span> </span> </span> </span> </span> <br /> <br class="Apple-interchange-newline" /> </span>}, number={2}, publisher={MUSA YILMAZ}