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This work presents the first prototype of a novel class of bearingless slice motors whose main difference from other examples of this motor topology is the absence of permanent magnets in the rotor. A homopolar permanent magnetic bias air gap field is generated by stator magnets and enables passive stabilization of three degrees of freedom. This drive concept features special operational behaviors that distinguish it from other state-of-the-art bearingless drives. A prototype motor was optimized and fabricated, and measurements were conducted to verify finite element simulation results and to prove the functionality of the drive and its nonlinear control scheme.I.

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