511 Total artificial heart with magnetically levitated motor : Radial displacement stabilizing mechanism using energy transmission technology

Abstract

A magnetically levitated total artificial heart has been developed with a single magnetically levitated motor. The device has double pumps which replace left and right ventricles. A stator which has both of a magnetic bearing core and a motor stator core is set at center of the device. A levitated part is formed with left and right pump impellers which are connected with a shaft through the center hall of the stator core. These impeller's axial position and tilting around x-axis and y-axis are controlled by the magnetic bearing, and its radial position is passively supported with attractive force exerted on the impellers. In this study, radial displacement stabilizing mechanism using energy transmission technology is invented and evaluated. The stabilizing force is estimated at 0.62 mN basic function of the developed mechanism is confirmed.