Identification of Rotor Yoke Material of a Hydrogenerator

This paper proposes a method to identify a material of the rotor yoke in a hydrogenerator with the will to make a digital twin of it. A model of the hydrogenerator is made in the FEA software ANSYS Maxwell from the original construction blueprints except that information about the rotor yoke material are unavailable. Analytical computations limit the number of possible materials comparing results to measurements. Simulations by FEA of no-load tests characterize the behavior of each materials. Parameters of simulation are changed as to approach closer to values expected. It will be found that FEA helps to detect misconceptions in models.