Title :
A comparative study on the effect of switching functions in SMO for PMSM drives
Author :
Srikanth, V. ; Dutt, A.A.
Author_Institution :
M. Tech Ind. Drives & Control, Rajiv Gandhi Inst. of Technol., Kottayam, India
Abstract :
This paper presents a comparative study on the performance of Sliding Mode Observer (SMO), for various switching functions. SMO is widely used to realize the sensorless control of Permanent Magnet Synchronous Motor (PMSM). Chattering is a major drawback of Sliding Mode observers. Chattering creates oscillations, performance degradation and even instability to the system. Studies on the effect of chattering in PMSM drives with three control laws namely:- Signum function, Saturation function and Sigmoid function are carried out in this work. The complexity introduced by signum and saturation functions is avoided by the sigmoid function. MATLAB/SIMULINK is used as the tool for the study.
Keywords :
observers; permanent magnet motors; sensorless machine control; synchronous motor drives; time-varying systems; variable structure systems; MATLAB-SIMULINK; PMSM drives; SMO; chattering; performance degradation; permanent magnet synchronous motor drives; saturation function; sensorless control; sigmoid function; signum function; sliding mode observer; switching functions; Chattering; PMSM; SMO;
Conference_Titel :
Power Electronics, Drives and Energy Systems (PEDES), 2012 IEEE International Conference on
Conference_Location :
Bengaluru
Print_ISBN :
978-1-4673-4506-4
DOI :
10.1109/PEDES.2012.6484351
