Abstract
A total artificial heart which has single maglev motor with double centrifugal pumps has been developed. The maglev motor is set between a left pump and a right pump. The impellers of the left and right pumps are connected with a connecting rod passed through at the center of the motor. The impellers are levitated magnetically and rotated with identical rotating speed. The flow balance between the left and right pumps is achieved by shifting the levitated impeller in the axial direction. Zero power control is adapted for preload sensitive control. The maximum diameter and height of the pump are 76 mm and 61 mm, respectively. The pump indicates sufficient pump performance with the maximum flow rate of 20 L/min in usage condition. The flow rate is changed more than by 10 % of the flow rate of the pumps with an impeller position changing of 0.4 mm.
