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A Magnetic Suspension Theory and Its Application to the HeartQuest Ventricular Assist Device
Author(s) -
Chen Chen,
Paden Brad,
Antaki James,
Ludlow Jed,
Paden Dave,
Crowson Randolph,
Bearnson Gill
Publication year - 2002
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1046/j.1525-1594.2002.07125.x
Subject(s) - suspension (topology) , electromagnetic suspension , ventricular assist device , biomedical engineering , cardiology , medicine , computer science , materials science , engineering , mechanical engineering , heart failure , mathematics , magnet , homotopy , pure mathematics
Motivated by the design of the HeartQuest magnetically levitated left ventricular assist device, closed form expressions have been developed to compute forces and stiffnesses of magnetic suspensions. The theory applies to any combination of concentric permanent magnet rings, and its accuracy and versatility were verified by experiments. The equations adapt to spreadsheet implementation and numerical optimization, providing a powerful tool of optimal design of magnetically levitated ventricular assist devices (VADs). The method was applied to the development of the HeartQuest VAD which achieved remarkable compactness and stable operation.