TY - GEN
T1 - Performance comparison of sliding mode observers for back EMFs based speed estimation in PMSM
AU - Kommuri, Suneel K.
AU - Rath, Jagat J.
AU - Veluvolu, Kalyana C.
AU - Defoort, M.
AU - Tatinati, S.
N1 - Publisher Copyright:
© 2015 Institute of Control, Robotics and Systems - ICROS.
PY - 2015/12/23
Y1 - 2015/12/23
N2 - This paper proposes a second-order high-speed sliding mode (SHSM) observer and compares the performance with the recent higher-order sliding mode (HOSM) observer for the problem of sensorless speed estimation in the permanent magnet synchronous motor (PMSM). In which, a sigmoid function is substituted for the signum function with a variable boundary layer. A SHSM observer is proposed to provide the estimation of back electro motive forces (EMFs) that are treated as unknown inputs in the PMSM model. An accurate speed estimate of PMSM can be algebraically computed with the estimated back EMFs. The chattering phenomenon, that is commonly found in the sliding mode observers is well-reduced by replacing signum function with the sigmoid function, in comparison to the HOSM observer. Simulation results show the effectiveness of the proposed SHSM speed estimation method in comparison to the earlier HOSM observer in terms of good accuracy and chattering phenomenon.
AB - This paper proposes a second-order high-speed sliding mode (SHSM) observer and compares the performance with the recent higher-order sliding mode (HOSM) observer for the problem of sensorless speed estimation in the permanent magnet synchronous motor (PMSM). In which, a sigmoid function is substituted for the signum function with a variable boundary layer. A SHSM observer is proposed to provide the estimation of back electro motive forces (EMFs) that are treated as unknown inputs in the PMSM model. An accurate speed estimate of PMSM can be algebraically computed with the estimated back EMFs. The chattering phenomenon, that is commonly found in the sliding mode observers is well-reduced by replacing signum function with the sigmoid function, in comparison to the HOSM observer. Simulation results show the effectiveness of the proposed SHSM speed estimation method in comparison to the earlier HOSM observer in terms of good accuracy and chattering phenomenon.
KW - Permanent magnet synchronous motor (PMSM)
KW - sigmoid function
KW - sliding mode observers
KW - unknown input estimation
UR - http://www.scopus.com/inward/record.url?scp=84966429552&partnerID=8YFLogxK
U2 - 10.1109/ICCAS.2015.7364615
DO - 10.1109/ICCAS.2015.7364615
M3 - Conference Proceeding
AN - SCOPUS:84966429552
T3 - ICCAS 2015 - 2015 15th International Conference on Control, Automation and Systems, Proceedings
SP - 1612
EP - 1617
BT - ICCAS 2015 - 2015 15th International Conference on Control, Automation and Systems, Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 15th International Conference on Control, Automation and Systems, ICCAS 2015
Y2 - 13 October 2015 through 16 October 2015
ER -