Bearingless 300-W PMSM for Bioreactor Mixing

This paper presents a novel exterior rotor topology of a bearingless brushless synchronous motor with rated power of 300 W. Owing to the large possible magnetic gap and the absence of mechanical bearings, this motor is especially qualified for high-purity and low-shear applications (e.g., bioreactor...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2012-03, Vol.59 (3), p.1376-1388
Main Authors: Reichert, T., Nussbaumer, T., Kolar, J. W.
Format: Article
Language:English
Subjects:
Bearingless motor
Bearings
bioreactor stirrer
Bioreactors
brushless motor
Computer simulation
exterior rotor
Force
Magnetic levitation
Mathematical analysis
Mixers
Motors
Permanent magnet motors
Rotors
self-bearing motor
Stator windings
Synchronous motors
Three dimensional
Torque
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Summary:This paper presents a novel exterior rotor topology of a bearingless brushless synchronous motor with rated power of 300 W. Owing to the large possible magnetic gap and the absence of mechanical bearings, this motor is especially qualified for high-purity and low-shear applications (e.g., bioreactor mixing). Both torque and magnetic bearing forces are created inside this disk-shaped motor using a sophisticated control (proportional-integral-differential vector control) with superimposed drive and bearing currents fed to the concentrated combined stator coils. Optimal design is derived based on an electromagnetic analysis using the three-dimensional finite element method (3D-FEM), and the simulation results are verified with a prototype mixer setup.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2011.2126532