Title :
New Model of Radial Force Determination in Bearingless Motor
Author :
Lapotre, Blaise ; Takorabet, Noureddine ; Meibody-Tabar, Farid ; Fontchastagner, Julien ; Lateb, Ramdane ; Da Silva, Joaquim
Author_Institution :
Groupe de Rech. en Electrotech. et Electron. de Nancy, Univ. de Lorraine, Nancy, France
Abstract :
This paper proposes to determine the radial forces in bearingless permanent magnet motor topology. We consider normal and tangential components of the magnetic field in the air gap. Their harmonic components and their evolution versus current and rotor position are considered. This allows establishing the semianalytical expressions of the radial forces considering different field sources. Their precision has been verified using a full finite element model and statistic analysis. The advantage of this semianalytical model lies in the swiftness of the different force components evaluation and consequently the reduction of CPU time.
Keywords :
finite element analysis; machine insulation; machine theory; permanent magnet motors; rotors; statistical analysis; bearingless permanent magnet motor topology; finite element model; harmonic component; magnetic field; radial force determination; rotor position; semianalytical model; statistical analysis; Air gaps; Atmospheric modeling; Force; Harmonic analysis; Magnetic levitation; Permanent magnet motors; Rotors; Bearingless permanent magnet (PM) motor; CPU time reduction; normal and tangential components of the magnetic field; radial force; semianalytical method; spectral analysis;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2354536
