... and held through bearings, then the whole design is hyperstatic. Both aspects can be critical at VHSs. Findings An indirect method based on the inertia of the rotor allows to measure high torques very rapidly. It is validated through a second method based on eddy currents. Also, a practical setup...

...Robert Smolenski; Adam Kempski; Jacek Bojarski Purpose The purpose of this paper is to propose a statistical approach, which enables the prediction of the risk of the appearance of discharge bearing currents in a given drive that can damage the motor bearings. Using such an approach, the drives...

...Emine Ayaz; Ahmet Öztürk; Serhat Şeker; Belle R. Upadhyaya Purpose The purpose of this paper is to extract features from vibration signals measured from induction motors subjected to accelerated aging of bearings by fluting tests. Design/methodology/approach Aging tests were performed...

...Stanislaw Gratkowski; Andrzej Brykalski; Ryszard Sikora; Hardo May; Jan Hoffmann; Wolf‐Ruediger Canders; Ryszard Palka Purpose The purpose of this paper is to focus on superconducting magnetic bearings (SMB). SMB for high‐speed rotors are contact free and offer inherently stable operations thus...