Abstract
An innovative Bi-Ventricular Artificial Heart (IB-Heart) has been successfully developed with a single magnetically suspended motor. The device has auto flow regulation function which reacts to atrial pressure change in order to balance the flow rate of left and right pump. The zero power control is adopted to control axial position of levitated impeller in the IB-Heart. The rate of change of the axial position of the impeller on the atrial pressure change is the key factor of this device's flow regulation function since the flow rate of the pumps is regulated with axial position changing of the levitated impeller. The flow regulating ability of the IB-Heart and the relationship between the rod cross-sectional area and the flow regulation function was investigated. The maglev motor was redesigned with 3-D magnetic field analysis to improve the flow regulation function.
