Design and Implementation of a Novel Interior Permanent Magnet Bearingless Slice Motor

In this article, we present a bearingless motor with a novel segmented dipole interior permanent magnet (IPM) slice rotor. The segmented dipole IPM rotor contains a unique pattern of interior permanent magnets arranged to generate a dipole air gap flux pattern. The magnets are encapsulated within an...

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Bibliographic Details
Published in:IEEE transactions on industry applications 2021-11, Vol.57 (6), p.6774-6782
Main Authors: Weinreb, Benjamin S., Noh, Minkyun, Fyler, Donald C., Trumper, David L.
Format: Article
Language:English
Subjects:
Air gaps
Algorithms
Bearingless motor
Decoupling
Design
Dipoles
Electrical steels
Force
interior permanent magnet
Levitation
magnetic levitation
Magnetism
Permanent magnet motors
Permanent magnets
Prototypes
Reluctance motors
Rotation
Rotors
Stator windings
Topology
Torque
Winding
Windings
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Summary:In this article, we present a bearingless motor with a novel segmented dipole interior permanent magnet (IPM) slice rotor. The segmented dipole IPM rotor contains a unique pattern of interior permanent magnets arranged to generate a dipole air gap flux pattern. The magnets are encapsulated within an electrical steel rotor structure. The stator contains a three-phase, four-pole winding for suspension and a three-phase, two-pole winding for rotation. We present analyses of several candidate rotor designs. The analyses indicate that the segmented dipole IPM rotor achieves a reduced tradeoff between force and torque capacity and relatively symmetric force dynamics as compared to prior art designs and alternate topologies. Symmetric and decoupled force dynamics allow a simple force decoupling algorithm to be used. We designed, constructed, and tested a prototype system. We experimentally demonstrate that the prototype system can achieve stable levitation and open-loop rotation.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2021.3080663