Design and Implementation of a Magnetically Levitated Single-Axis Controlled Axial Blood Pump
Sheng-Ming Yang
Ming-Shi Huang
Dept. of Electr. Eng., Nat. Taipei Univ. of Technol., Taipei;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: June 2009
Volume: 56,
Issue: 6
On page(s): 2213-2219
ISSN: 0278-0046
INSPEC Accession Number: 10713207
Digital Object Identifier: 10.1109/TIE.2009.2017095
First Published: 2009-03-16
Current Version Published: 2009-06-02
Abstract
This paper presents the design and implementation of a magnetically levitated axial blood pump. The rotor has a hollow structure for fluid flow, and the impeller is mounted on the rotor inner surface. The magnetic suspension system is realized using two passive magnetic bearings for radial direction balancing and an electromagnetic actuator for axial direction balancing. A sensor assembly for the rotor's axial position control is also presented. This sensor can measure axial displacement with good accuracy. A prototype pump was built and investigated. The experimental results demonstrate successful magnetic levitation and water-pumping operations. Because radial movements were not actively controlled, noticeable oscillations existed in these directions. These oscillations were caused mainly by the radial force produced by the actuator.
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