Improved speed estimation in sensorless PM brushless AC drives

Author

Shen, J.X. ; Zhu, Z.Q. ; Howe, David

Author_Institution

Dept. of Electron. & Electr. Eng., Univ. of Sheffield, UK

Volume

38

Issue

4

fYear

2002

Firstpage

1072

Lastpage

1080

Abstract

The application of flux-observer-based sensorless control to permanent-magnet brushless AC motor drives is described. Current methods of speed estimation are assessed, both theoretically and experimentally, and an improved method, which combines the best features of methods in which speed is derived from the differential of rotor position and from the ratio of the electromotive force to excitation flux linkage, is proposed. Its performance is verified experimentally.

Keywords

AC motor drives; brushless machines; control system analysis; control system synthesis; dynamic response; machine testing; machine theory; machine vector control; observers; parameter estimation; permanent magnet motors; velocity control; control design; control performance; control simulation; electromotive force; excitation flux linkage; flux-observer-based sensorless control; rotor position; sensorless PM brushless AC motor drives; speed estimation; AC motors; Couplings; Feedback; Force sensors; Frequency; Low pass filters; Rotors; Sensorless control; Servomotors; Steady-state;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/TIA.2002.800778

Filename

1019964