Title :
Improved Signal Injection Based Sensorless Technique for PM Brushless AC Drives
Author :
Li, Y. ; Zhu, Z.Q. ; Bingham, C.M. ; Howe, D.
Author_Institution :
Sheffield Univ., Sheffield
Abstract :
The accuracy of rotor position estimation in the conventional signal injection based sensorless control of permanent magnet brushless AC drives depends on the load current. This paper proposes an improved method, which significantly reduces the estimation error by accounting for the cross-coupling effect between the d-and q-axes. The conventional and proposed methods are described and their performance is compared by both simulation and experiment.
Keywords :
AC motor drives; brushless machines; machine control; permanent magnet motors; rotors; PM brushless AC drives; cross-coupling effect; estimation error; load current; rotor position estimation; signal injection; Frequency conversion; Frequency estimation; Induction motors; Permanent magnets; Pulse width modulation; Rotors; Sensorless control; Space vector pulse width modulation; Stators; Voltage;
Conference_Titel :
Networking, Sensing and Control, 2007 IEEE International Conference on
Conference_Location :
London
Print_ISBN :
1-4244-1076-2
Electronic_ISBN :
1-4244-1076-2
DOI :
10.1109/ICNSC.2007.372871
