| 摘要 |
A fully implantable axial flow blood pump (10) having a magnetically suspended rotor (16) in which both alignment and torque are provided by a pair of axially spaced sets of stator armatures (18) and corresponding permanent magnets (50) in the rotor (16). The position and inclination of the rotor axis (34) are sensed in the pump (10) by sensors (36) imbedded in the stator blades (15). The use of rare earth magnetic materials in the rotor (16) makes it possible to maintain a substantial blood flow path area (30) between the poles (44, 46) of the stator armature (18) and the rotor (16) so as to allow a substantial blood flow from blood flow path (12), yet the location of the rotor position sensors (36) in the pump stator blades (15) makes it possible to sense extremely small position changes of the rotor axis (34) very rapidly. |
