CentriMag
TM
Circulatory Support System Operation Manual (US)
Page 22 of 126
© 2019 Abbott – Document No PL-0047, Rev 11 (December 2019)
Figure 7: Schematic depicting the basic principle of the bearingless centrifugal
Pump and Motor
External position sensors actively control the radial impeller position. Processor-controlled
electronics regulate the magnetic fields so that the impeller is always centered. The
electronics control precise regulation of the radial impeller position and the speed. Axial
position and tilting of the impeller are passively stabilized (
). The non-contacting
impeller is levitated by magnetic fields through the walls of the Pump, and floats in the
center of the Pump.
Figure 8: Axial support (a) and stabilization against tilting (b) of the impeller by
passive magnetic forces in the Pump
Impeller
stator
winding
impeller
inlet
outlet
Pump housing