Improved speed estimation in sensorless PM brushless AC drives

Author

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

Author_Institution

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

fYear

2001

fDate

2001

Firstpage

960

Lastpage

966

Abstract

The paper reports on the application of flux observer based sensorless control techniques to PM brushless AC motors. Current methods of speed estimation and their relative merits are assessed, both theoretically and experimentally, and an improved speed estimation method, which combines the best features of the average of the estimated rotor position differential and the ratio of the EMF 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; feedback; machine testing; machine theory; machine vector control; parameter estimation; permanent magnet motors; rotors; velocity control; EMF; control design; control performance; excitation flux-linkage; flux observer; rotor position differential; sensorless PM brushless AC motor drives; speed estimation improvement; AC motors; Electric resistance; Feedback; Frequency; Input variables; Low pass filters; Rotors; Sensorless control; Servomotors; Steady-state;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Machines and Drives Conference, 2001. IEMDC 2001. IEEE International

Conference_Location

Cambridge, MA

Print_ISBN

0-7803-7091-0

Type

conf

DOI

10.1109/IEMDC.2001.939438

Filename

939438