System design and comparison of calculated and measured performance of a bearing less BLDC-drive with axial flux path for an implantable blood pump

Medical applications of electromagnetically actuators are strongly increasing. The essay presents optimisation and validating process of an implantable mechanical blood pump realised with an integrated axial flux machine. Existing systems suffer from bearing wear and increased stress to blood cells, therefore an innovative design using magnetic and hydraulic forces to avoid mechanical bearings is presented. Geometrical calculations have been performed using 3D-FEM and results have been validated by experimental measurements. A geometry with six poles and two phases fits best to the requirements. Furthermore, calculated results match the measured values very well, the approach seems to be well realisable