Sensorless control for IPMSMs based on a multilayer discrete-time sliding-mode observer

Because of the high robustness to system structure and parameter uncertainties, discrete-time sliding-mode observer (DSMO) has become a promising candidate for sensorless digital control of interior permanent magnet synchronous machines (IPMSMs). However, it is challenging to achieve fully sliding mode under a low sampling frequency, especially for high speed and heavy load applications. In order to overcome this problem, a multilayer DSMO is proposed to estimate the rotor position from the extended back electromagnetic force (EMF). To guarantee a fast response to speed and torque variations, the width of the boundary layer of the DSMO is designed to be adaptive to speed and torque variations. A parameter adaption scheme based on control law and sliding-mode dynamics is proposed for selecting the width of the boundary layer and the observer gain. The proposed multilayer DSMO is validated by simulations and experimental results on a 150 kW IPMSM drive system used for hybrid electric vehicles.

[1]  R. Decarlo,et al.  Variable structure control of nonlinear multivariable systems: a tutorial , 1988, Proc. IEEE.

[2]  Longya Xu,et al.  Position Sensorless Control of PMSM Based on a Novel Sliding Mode Observer over Wide Speed Range , 2006, 2006 CES/IEEE 5th International Power Electronics and Motion Control Conference.

[3]  Long Wu,et al.  Compensation algorithms for sliding mode observers in sensorless control of IPMSMs , 2012, 2012 IEEE International Electric Vehicle Conference.

[4]  Muhammed Fazlur Rahman,et al.  Sensorless Sliding-Mode MTPA Control of an IPM Synchronous Motor Drive Using a Sliding-Mode Observer and HF Signal Injection , 2010, IEEE Transactions on Industrial Electronics.

[5]  Zheng Zhang,et al.  Sliding-Mode Sensorless Control of Direct-Drive PM Synchronous Motors for Washing Machine Applications , 2009, IEEE Transactions on Industry Applications.

[6]  Vadim I. Utkin,et al.  Sliding mode observers for electric machines-an overview , 2002, IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02.

[7]  V. Utkin.  Variable structure systems with sliding modes , 1977 .

[8]  Bijnan Bandyopadhyay,et al.  Multirate Output Feedback Based Robust Quasi-Sliding Mode Control of Discrete-Time Systems , 2007, IEEE Transactions on Automatic Control.

[9]  Changsheng Li,et al.  Sliding mode observer for wide-speed sensorless control of PMSM drives , 2003, 38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003..

[10]  Yue Zhao,et al.  Position extraction from a discrete sliding-mode observer for sensorless control of IPMSMs , 2012, 2012 IEEE International Symposium on Industrial Electronics.

[11]  Shigeru Okuma,et al.  An extended electromotive force model for sensorless control of interior permanent-magnet synchronous motors , 2003, IEEE Trans. Ind. Electron..

[12]  Yue Zhao,et al.  Dead-time effect and current regulation quality analysis for a sliding-mode position observer-based sensorless IPMSM drives , 2012, 2012 IEEE Industry Applications Society Annual Meeting.

[13]  M. Pacas,et al.  Sensorless Drives in Industrial Applications , 2011, IEEE Industrial Electronics Magazine.

[14]  Andrzej Bartoszewicz,et al.  Discrete-time quasi-sliding-mode control strategies , 1998, IEEE Trans. Ind. Electron..