Influence of back-EMF and current harmonics on position estimation accuracy of permanent magnet synchronous machine

Author

Almarhoon, Ali H. ; Zhu, Z.Q.

Author_Institution

Dept. of Electonic & Electriacl Eng., Univ. of Sheffield, Sheffield, UK

fYear

2014

fDate

22-25 Oct. 2014

Firstpage

2728

Lastpage

2733

Abstract

The influence of back-EMF and current harmonics on the position estimation accuracy of surface-mounted permanent magnet synchronous machine (SPMSM) based on two sensorless control techniques, i.e. flux-linkage observer (FO) and simplified Extended Kalman Filter (EKF), is investigated and compared in this paper. When back-EMFs and currents exhibit high order harmonics, the sensorless control performance might suffer from significant reduction in position estimation accuracy. In order to obtain the influence of harmonics, the position estimation results by both sensorless control strategies are compared and validated by experiments. It has been concluded that due to the high noise rejection ability of simplified EKF, better position estimation is obtained compared to FO counterpart.

Keywords

Kalman filters; electric potential; nonlinear filters; permanent magnet machines; synchronous machines; EKF; SPMSM; back-EMF; current harmonics; flux-linkage observer; position estimation; sensorless control techniques; simplified extended Kalman filter; surface-mounted permanent magnet synchronous machine; Estimation error; Harmonic analysis; Power harmonic filters; Rotors; Sensorless control; Vectors; Back-EMF and current harmonics; flux-linkage observer (FO); permanent magnet synchronous machines (PMSM); simplified Extended Kalman Filter (EKF);

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2014 17th International Conference on

Conference_Location

Hangzhou

Type

conf

DOI

10.1109/ICEMS.2014.7013962

Filename

7013962