Novel bearingless brushless motor in exterior rotor construction for stirred bioreactors

The paper presents a novel topology for a bearingless permanent magnet motor which is especially qualified for high-torque and yet gentle bioreactor stirring. Both torque and bearing forces are created inside this magnetically levitated disk-shaped motor using a sophisticated control with superimposed coil currents. An optimal design is derived using 3D-FEM analysis and the results are verified with a prototype setup. (6 pages)

[1]  Wei-Shou Hu,et al.  Cell culture technology for pharmaceutical and cell-based therapies , 2005 .

[2]  Natale Barletta,et al.  Principle and Application of a Bearingless Slice Motor , 1997 .

[3]  Murray Moo-Young,et al.  Clean-in-place systems for industrial bioreactors: Design, validation and operation , 2005, Journal of Industrial Microbiology.

[4]  W. Amrhein,et al.  Design aspects of bearingless slice motors , 2005, IEEE/ASME Transactions on Mechatronics.

[5]  Juan A. Asenjo,et al.  Bioreactor System Design , 1994 .

[6]  J.W. Kolar,et al.  Magnetically Levitated Homopolar Hollow-Shaft Motor , 2010, IEEE/ASME Transactions on Mechatronics.

[7]  Johannes Tramper,et al.  Basic Bioreactor Design , 1991 .

[8]  N. Watanabe,et al.  Basic Characteristic of the Multi-Consequent-Pole Bearingless Motor , 2007, 2007 Power Conversion Conference - Nagoya.

[9]  T. Nussbaumer,et al.  Novel Magnetically Levitated Two-Level Motor , 2008, IEEE/ASME Transactions on Mechatronics.

[10]  J.W. Kolar,et al.  Saturation effects in high acceleration bearingless motors , 2008, 2008 IEEE International Symposium on Industrial Electronics.

[11]  Johann W. Kolar,et al.  A Comparison of Separated and Combined Winding Concepts for Bearingless Centrifugal Pumps , 2009 .