Mini hemoreliable axial flow LVAD with magnetic bearings: part 3: modeling of demo-magnetic bearing and verification.
This paper discusses my previous work on aerospace magnetic bearings during the 1970s and 1980s. Modeling of the magnetic field in the bearing is discussed and stiffness test data are provided, which verifies the model. An LVAD this small was made possible by the use of axial field fringing ring magnetic bearings that are much stronger than the radial field bearings currently used in turbo pumps. The analytical design of a first prototype bearing is discussed in detail that is mainly of interest to bearing designers. Modeling was accurately done without finite element analysis (FEA), which readily provided design insights not easily obtained through FEA. This bearing was not meant to satisfy all specifications of a blood pump. The next prototype, to be reported at the 2001 ASAIO conference, will meet these specifications.
Goldowsky
Michael
M
D004867:Equipment Design; D006353:Heart-Assist Devices / Q000266:history* / Q000592:standards; D049673:History, 20th Century; D008280:Magnetics / Q000266:history*; D008904:Miniaturization; D015203:Reproducibility of Results