Analytical model and feedback control of the levitation force for an induction-type bearingless motor

Author

Yikang, He ; Heng, Nian

Author_Institution

Dept. of Electr. Eng., Zhejiang Univ., China

Volume

1

fYear

2003

fDate

17-20 Nov. 2003

Firstpage

242

Abstract

A relatively accurate analytical expression of the magnetic levitation force for an induction-type bearingless motor is proposed in this paper with the eccentricity in the location of stator and rotor taking into consideration, and its computation accuracy is verified by ANSOFT, an electro-magnetic field analysis software of electrical machines. Applying this analytical levitation force model, the real-time observation of magnetic levitation force is realized, the closed-loop control of levitation force is then implemented on the basis of air-gap-flux-oriented decoupling control system of the bearingless motor. Simulation study verifies the effectiveness of the approach in improving the static and dynamic performance of an induction-type bearingless motor.

Keywords

air gaps; closed loop systems; electric machine analysis computing; feedback; force control; induction motors; machine control; magnetic levitation; rotors; software engineering; stators; air-gap-flux-oriented decoupling control system; analytical levitation force model; closed-loop control; electrical machines; electromagnetic field analysis software; feedback control; induction-type bearingless motor; rotor; stator; Analytical models; Electrostatic levitation; Feedback control; Force control; Force feedback; Induction motors; Magnetic analysis; Magnetic levitation; Rotors; Stators;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Drive Systems, 2003. PEDS 2003. The Fifth International Conference on

Print_ISBN

0-7803-7885-7

Type

conf

DOI

10.1109/PEDS.2003.1282774

Filename

1282774