Title :
Sensorless position and speed estimation with improved integrator for PMLSM drive
Author :
Lu, Huacai ; Li, Manhua ; Xu, Yuetong
Author_Institution :
Anhui Provincial Key Lab. of Electr. & Control, Anhui Univ. of Technol. & Sci., Wuhu, China
Abstract :
This paper describes a sensorless position and speed detection algorithm designed for permanent magnet linear synchronous motor (PMLSM) drive. Measured line currents and terminal voltages are used to estimate the flux of the alpha-beta axis in stator frame, integrating the back electromotive force (EMF). Position and speed signals are derived from angle of the flux linkage and its change rate. A new improved integrator is presented and analyzed for compensate DC offsets and drift, which invariably exist in any practical implementation based on combination of low-pass filter, highpass filter and PI regulator. Experimental results are presented to show the realization of the objectives.
Keywords :
PI control; angular velocity control; electric potential; high-pass filters; linear synchronous motors; low-pass filters; machine control; permanent magnet motors; position control; power filters; stators; synchronous motor drives; DC offsets; PI regulator; PMLSM drive; back electromotive force; high-pass filter; low-pass filter; permanent magnet linear synchronous motor drive; position estimation; speed estimation; stator frame; Algorithm design and analysis; Couplings; Current measurement; Detection algorithms; Force measurement; Force sensors; Low pass filters; Stators; Synchronous motors; Voltage;
Conference_Titel :
Information and Automation, 2009. ICIA '09. International Conference on
Conference_Location :
Zhuhai, Macau
Print_ISBN :
978-1-4244-3607-1
Electronic_ISBN :
978-1-4244-3608-8
DOI :
10.1109/ICINFA.2009.5204953
