Experimental Electromechanical Characterization of Slotted and Slotless Miniature Bearingless Drives

Magnetically-levitated drives are interesting in applications which demand a combination of reliable operation and high speeds. In the latter domain, slotless stators are recognized as the most suitable, as they deliver higher power density and lower speed-dependent losses. Nevertheless, the larger airgaps proper to slotless topologies minder bearing load capacities.