title: A magnetic suspension theory and its application to the HeartQuest ventricular assist device.
abstract: 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.
authors.affiliation: Magnetic Moments, LLC, Goleta, California 93117, USA. chen@mmsb.com
authors.forename: Chen
authors.initials: C
authors.lastname: Chen
authors.forename: Brad
authors.initials: B
authors.lastname: Paden
authors.forename: James
authors.initials: J
authors.lastname: Antaki
authors.forename: Jed
authors.initials: J
authors.lastname: Ludlow
authors.forename: Dave
authors.initials: D
authors.lastname: Paden
authors.forename: Randolph
authors.initials: R
authors.lastname: Crowson
authors.forename: Gill
authors.initials: G
authors.lastname: Bearnson
mesh_terms: D002318:Cardiovascular Diseases / Q000628:therapy*; D006353:Heart-Assist Devices; D006801:Humans; D008280:Magnetics / Q000627:therapeutic use*; D008432:Mathematical Computing; D013598:Systems Theory