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Axial magnetic bearing development for the BiVACOR Rotary BiVAD/TAH

Greatrex, N.A., Timms, D.L., Kurita, N., Palmer, E.W., & Masuzawa, T. (2010) Axial magnetic bearing development for the BiVACOR Rotary BiVAD/TAH. IEEE Transactions on Biomedical Engineering, 57(3), p. 714.

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Abstract

A suspension system for the BiVACOR biventricular assist device (BiVAD) has been developed and tested. The device features two semi-open centrifugal impellers mounted on a common rotating hub. Flow balancing is achieved through the movement of the rotor in the axial direction. The rotor is suspended in the pump casings by an active magnetic suspension system in the axial direction and a passive hydrodynamic bearing in the radial direction. This paper investigates the axial movement capacity of themagnetic bearing system and the power consumption at various operating points. The force capacity of the passive hydrodynamic bearing is investigated using a viscous glycerol solution. Axial rotor movement in the range of ±0.15 mm is confirmed and power consumption is under 15.5 W. The journal bearing is shown to stabilize the rotor in the radial direction at the required operating speed. Magnetic levitation is a viable suspension technique for the impeller of an artificial heart to improve device lifetime and reduce blood damage.

Impact and interest:

10 citations in Scopus
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5 citations in Web of Science®

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ID Code: 38653
Item Type: Journal Article
Keywords: Artificial Biological Organs, Blood Pumps, Electro-magnetic Forces, Magnetic Levitation
DOI: 10.1109/TBME.2009.2033389
ISSN: 0018-9294
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > BIOMEDICAL ENGINEERING (090300) > Medical Devices (090304)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2009 IEEE
Copyright Statement: Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Deposited On: 19 Nov 2010 10:19
Last Modified: 01 Mar 2012 00:16

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