Abstract
We investigate the squeeze effect by deriving a theoretical model for clarifying the dynamics of axial maglev blood pumps. The resonance frequency of the model changed from 73.4 Hz to 34.0 Hz by considering the squeeze effect. The model with the squeeze effect indicates the close resonance frequency of actual maglev blood pump 34.2 Hz. From these result, we judged that the squeeze effect acts significantly on the axial dynamic characteristics of the axial maglev blood pump and the stability of the levitated impeller. Additionally, we showed that the force of squeeze effect has a larger effect on the dynamics of the impeller than viscous damping force and the force of added mass effect.
