Abstract
A miniaturized magnetically levitated axial flux motor which can actively control 5-dgrees of freedom (5-DOF) of impeller postures has been newly developed for a paediatric ventricular assist device (VAD). The developed motor consists of a top stator, a bottom stator and a levitated impeller which is set between the both stators. A novel 5-DOF control theory with a double stator mechanism was proposed. A prototype motor which has the outer diameter of 28 mm and the height of 41 mm was developed in order to verify the feasibility of proposed control theory. The static characteristics of the axial attractive force, the rotating torque, the radial attractive force and the restoring torque were examined. The developed motor produced sufficient suspension force and the rotating torque required for the paediatric VAD.
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