C. Grabner, E. Schmidt:
"Analytical Approximation of the Displacement Process of Roebel Bars";
Talk: IEEE Industry Applications Society 37th Annual Meeting, Pittsburgh PA, USA; 10-13-2002 - 10-18-2002; in: "Proceedings of the IEEE Industry Applications Society 37th Annual Meeting", (2002), ISBN 0-7803-7422-5; 1135 - 1140.

The mechanical displacement of Roebel bars inlaid in slots of synchronous machines is caused by forces of electromagnetic and mechanical origin. In each occurring operational state, the mechanical behaviour is affected not only by the forces but also by nonlinear magnetic and mechanical material properties. The presented analytical calculations take into account for this influence with appropriate boundary conditions and introducing correction coefficients in dependence of the bar currents. The analytical method for calculating the bar displacement is compared with fully coupled electromagnetic -mechanical finite element analyses whereby the sufficient high accuracy of the analytical results is confirmed.