Title :
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
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;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2002.800778
