Magnetic Suspension Performance of a Bearingless Brushless DC Motor for Small Liquid Pumps

Author

Ooshima, Masahide ; Takeuchi, Chiharu

Author_Institution

Fac. of Syst. Eng., Tokyo Univ. of Sci., Chino, Japan

Volume

47

Issue

1

fYear

2011

Firstpage

72

Lastpage

78

Abstract

This paper presents the experiment results from the testing of a magnetic suspension system in a bearingless brushless dc motor. This machine is suitable for use in small liquid pumps. The bearingless motor structure, the principle of the suspension force generation, and the magnetic suspension control strategy are proposed by the author. A prototype bearingless brushless dc motor is designed using computed results from a finite-element method simulation of the system. The simulation is experimentally verified using a prototype machine where the rotor is successfully suspended without mechanical contact when it drives a liquid pump at the maximum rotational speed of 2200 r/min and the maximum fluid flow of 8.2 L/min. This result shows that the proposed bearingless brushless dc motor is suitable as the drive for small liquid pumps.

Keywords

brushless DC motors; finite element analysis; machine bearings; machine testing; magnetic fluids; mechanical contact; rotors; bearingless brushless DC motor; finite element method; fluid flow; liquid pumps; magnetic suspension control strategy; magnetic suspension system testing; mechanical contact; rotational speed; rotor; suspension force generation; Brushless DC motors; Force; Magnetic levitation; Rotors; Suspensions; Windings; Bearingless motor; liquid pump drive; magnetic bearing; magnetic suspension performance;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/TIA.2010.2091233

Filename

5624584