A rotor position and speed observer for permanent-magnet motors with nonsinusoidal EMF waveform

Author

Angelo, Cristian De ; Bossio, Guillermo ; Solsona, Jorge ; García, Guillermo O. ; Valla, María Inés

Author_Institution

Consejo Nacional de Investigaciones Cientificas y Tecnicas, Argentina

Volume

52

Issue

3

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

807

Lastpage

813

Abstract

A new nonlinear reduced-order observer to estimate the rotor speed and position for permanent-magnet motors, with arbitrary electromotive force (EMF) waveform, is presented. The proposed observer is suitable for the realization of a torque control with minimum torque ripple. In order to implement the observer, the EMF generated by the motor is first obtained experimentally offline. After that, it is approximated by a Fourier series in order to develop the model to be used in the online estimation. From the estimated EMF, rotor position and speed are calculated using the relationship between the EMF and the rotor variables. The proposal is validated with experimental results.

Keywords

AC motors; Fourier series; machine control; nonlinear estimation; observers; permanent magnet motors; rotors; torque control; EMF waveform; Fourier series; nonlinear estimation; nonlinear reduced-order observer; nonsinusoidal electromotive force waveform; permanent-magnet AC motor; rotor position observer; rotor speed observer; torque control; torque ripple; AC machines; DC machines; Fourier series; Permanent magnet motors; Proposals; Rotors; Sensorless control; Synchronous machines; Synchronous motors; Torque control; Nonlinear estimation; nonsinusoidal electromotive force (EMF) waveform; permanent-magnet motors;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2005.847582

Filename

1435692