Research on Rotor Eccentricity Compensation Control for Bearingless Surface-Mounted Permanent-Magnet Motors Based on an Exact Analytical Method

Author

Zhijian Qiu ; Jun Dai ; Jin Yang ; Xiaoyan Zhou ; Yuejin Zhang

Author_Institution

Sch. of Mechatron. Eng. & Autom., Shanghai Univ., Shanghai, China

Volume

51

Issue

11

fYear

2015

Firstpage

1

Lastpage

4

Abstract

An exact analytical model of a surface-mounted bearingless permanent-magnet synchronous motor (BPMSM) with rotor eccentricity by a perturbation method is proposed in this paper and its computational accuracy is verified by the finite-element method. Considering the rotor eccentricity, a compensation control system is implemented based on the mathematical model of levitation force by applying a coefficient of the rotor eccentricity calculated by the exact analytical method (EAM). The experimental results suggest the improvements of the dynamic and the static performances of the stable suspension state for the surface-mounted BPMSM and the feasibility and effectiveness of the EAM.

Keywords

control system analysis; finite element analysis; machine control; magnetic bearings; magnetic levitation; magnetic variables control; permanent magnet motors; perturbation techniques; bearingless permanent magnet motors; compensation control system; exact analytical method; finite element method; levitation force; perturbation method; rotor eccentricity compensation control; surface mounted permanent magnet motors; Analytical models; Force; Magnetic levitation; Mathematical model; Rotors; Synchronous motors; Bearingless motor; bearingless motor; compensation control; eccentricity; exact analytical method (EAM);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2015.2451163

Filename

7140813