Title :
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
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;
Conference_Titel :
Electric Machines and Drives Conference, 2001. IEMDC 2001. IEEE International
Conference_Location :
Cambridge, MA
Print_ISBN :
0-7803-7091-0
DOI :
10.1109/IEMDC.2001.939438
