Analysis of radial forces based on rotor eccentricity of bearingless switched reluctance motors

Author

Chen, L. ; Hofmann, W.

Author_Institution

Dept. for Electr. Machines & Drives, Dresden Univ. of Technol., Dresden, Germany

fYear

2010

fDate

6-8 Sept. 2010

Firstpage

1

Lastpage

6

Abstract

Eccentricity always changes rotor position in air gap, which greatly influences the distribution of magnetic flux in air gap and causes a great disturbance force. Therefore eccentricity is always restricted by an application of capture bearing in industry. Factors of unbalance forces based on eccentricities decide on successful design of bearing controller. In this paper, a mathematical model to calculate the forces based on eccentricity is created. Considering eccentricity, air gap of motor should be so chosen for an applied capture bearing, that eccentric force cannot exceed maximal winding levitation forces. All of the calculation and analysis are made for a novel switched reluctance bearingless motor (SRBM) with a single layer winding.

Keywords

air gaps; magnetic flux; reluctance motors; rotors; air gap; applied capture bearing; bearing controller; bearingless switched reluctance motors; magnetic flux; radial forces; rotor eccentricity; rotor position; winding levitation forces; Magnetic flux; Mathematical model; Rotors; Stator windings; Teeth; Windings; air gap; bearingless motor; eccentricity; levitation forces;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines (ICEM), 2010 XIX International Conference on

Conference_Location

Rome

Print_ISBN

978-1-4244-4174-7

Electronic_ISBN

978-1-4244-4175-4

Type

conf

DOI

10.1109/ICELMACH.2010.5608203

Filename

5608203