MAGNETICALLY LEVITATED ROTARY ARTIFICIAL HEART WITH AXIAL SUSPENSION MOTOR

摘要

Axially levitated motors were developed to apply magnetic suspension technology to artificial hearts. The feasibility of the axially levitated motor was confirmed with a prototype motor and a magnetically suspended centrifugal pump was constructed with an improved motor. The axially levitated motor consists of a top stator, a levitated rotor, and a bottom stator. The maximum rotating speed of the levitated motor with pumping the water was 1700 rpm. The maximum amplitude of the rotor displacement in the axial direction was only 0.07 mm during pumping the water. The maximum head pressure and flow rate of the pump were 120 mmHg and 7.8 l/min, respectively. The developed pump displayed sufficient magnetic suspension ability and the potential as a ventricular assist device.