Johann W. Kolar

TL;DR: In this article, bearing damage mechanisms are analyzed and the impact of stator grounding to avoid bearing currents in low power single-phase motors is presented based on the presented filter design procedure, which shows that hybrid bearing are undesirable in mass application.

TL;DR: In this paper, a symmetry controller is used to offset the power flow of the DC/DC converters in case of an asymmetry of the partial input voltages of the converters.

TL;DR: A comparative study of computational fluid dynamics simulations and in vitro hemolysis examinations of a bearingless centrifugal blood pump shows that CFD simulations have their limitations but can help with interpreting the outcomes of in vitro studies.

TL;DR: In this article, a performance evaluation between 2-phase and 3-phase bearingless slice motor concepts is undertaken, and it is shown that 3 phase systems can supply almost the same power as state-of-the-art 2.5 phase systems and achieve nearly the same acceleration behavior, although they have significantly less power electronics effort.

TL;DR: In this paper, the circulation of energy within different reaction wheels of an attitude control system was analyzed to limit the external power requirement, and integrated position sensors were used for limiting the axial length of the rotors, thereby further increasing the speed limits that may be resulting from rotor dynamics.