MAGNETIC SUSPENSION AXIAL FLOW BLOOD PUMP WITH AXIAL FEEDBACK CONTROL

摘要

Disclosed is a magnetic suspension axial-flow blood pump with axial feedback control, wherein a front rotor radial suspension magnet (22), a rear rotor radial suspension magnet (19) and a drive motor rotor (20) are embedded in an impeller hub (25); and a front axial control winding (6), a front stator radial suspension magnetic ring (7), a rear stator radial suspension magnetic ring (10) and a rear axial control winding (11) are wound around the wall of a pump cylinder (4) and respectively correspond to a front axial control magnet (23), the front rotor radial suspension magnet (22), the rear rotor radial suspension magnet (19) and a rear axial control magnet (18), such that a front radial magnetic suspension bearing and a rear radial magnetic suspension bearing for an impeller are formed. The front axial control magnet (23) and the rear axial control magnet (18) limit the axial position of the impeller hub (25) under the control of the front axial control winding (6) and the rear axial control winding (11). A hall sensor (16) is embedded in a front end of a rear flow guide cone (13), and outputs a position signal to an axial feedback control circuit.