Abstract
Levitation Stability of the Passive Magnetic Bearing in a Nutation Blood Pump
Highlights
The blood pump has been widely studied as an important component of the total artificial heart (TAH) and the ventricular assist device (VAD)
The magnetically levitated blood pump, as the third-generation artificial heart pump without a mechanical bearing that has high durability and low hemolytic properties as well as anti-thrombogenicity, is a leading candidate for TAHs and VADs.[1,2] The passive magnetic bearing, which does not have any additional energy consumption or complex control systems, is regarded as the most promising magnetic bearing for use in blood pumps.[3]. Several blood pumps with passive magnetic bearings have been developed for use in clinical settings, such as the Valvo pump,(4) HeartWare HVAD,(5) and Arrow CorAide.[6]. Chen et al[7] proposed a passive magnetically levitated nutation blood pump with advantages of a small volume rate and low rotational speed
We proposed some valuable principles of the nutation blood pump for constructing a next-generation VAD
Summary
The blood pump has been widely studied as an important component of the total artificial heart (TAH) and the ventricular assist device (VAD). Experimentally verified the structure and principle of blood flow in the pump They did not study the levitation stability of the passive magnetic bearing. To achieve high stability at ultrahigh flywheel speeds with low power consumption, cross-feedback PID control was applied to the AMB flywheel system. In this experimental study, the gyroscopic effect of the flywheel was effectively suppressed. Xia et al[12] analyzed the stability of a rotor system in a magnetically suspended control and a sensitive gyroscope with the rotation of a Lorentz force magnetic bearing. An analysis of the levitation stability of a passive magnetic bearing in the nutation process is presented. Real-time monitoring of the rotor at various rotational speeds is reported in Sects. 3 and 4
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