Topology Comparison and Design of a Slotted Bearingless High-Speed Permanent Magnetic Synchronous Machine

The design and implementation of a bearingless high-speed motor are presented. Several different rotor and stator topologies are discussed and simulated to determine their suitability for high-speed operation. Finally, the most promising concept is implemented as a prototype. To the author's be...

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Bibliographic Details
Published in2019 IEEE International Electric Machines & Drives Conference (IEMDC) pp. 1 - 8
Main Authors Wex, Bianca, Zochbauer, Andreas, Mitterhofer, Hubert, Gruber, Wolfgang
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2019
Subjects
Air gaps
bearingless slice motor
high-speed motor
Rotors
slotted stator
Stator windings
tilt damper winding
Topology
Windings
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Summary:The design and implementation of a bearingless high-speed motor are presented. Several different rotor and stator topologies are discussed and simulated to determine their suitability for high-speed operation. Finally, the most promising concept is implemented as a prototype. To the author's best knowledge for the first time a bearingless high-speed slice motor with slotted stator is manufactured. The slotted stator features the advantage of reduced magnetic air gap compared to motors with toroidal air-gap windings and slotless stator. The smaller air gap leads to increased air-gap bias flux and increased stiffness values as well as higher force and torque constants. Additionally a damper winding is included to suppress tilt motions.
DOI:10.1109/IEMDC.2019.8785166