Sensorless position estimation of Permanent-Magnet Synchronous Motors using a saturation model

Sensorless control of Permanent-Magnet Synchronous Motors (PMSM) at low velocity remains a challenging task. A now well-established method consists in injecting a high-frequency signal and use the rotor saliency, both geometric and magnetic-saturation induced. This paper proposes a clear and original analysis based on second-order averaging of how to recover the position information from signal injection; this analysis blends well with a general model of magnetic saturation. It also proposes a simple parametric model of the saturated PMSM, based on an energy function which simply encompasses saturation and cross-saturation effects. Experimental results on a surface-mounted PMSM and an interior magnet PMSM illustrate the relevance of the approach.

[1]  Jung-Ik Ha,et al.  Analysis of permanent magnet machine for sensorless control based on high frequency signal injection , 2003 .

[2]  M.J. Kamper,et al.  Anisotropy Comparison of Reluctance and PM Synchronous Machines for Position Sensorless Control Using HF Carrier Injection , 2009, IEEE Transactions on Power Electronics.

[3]  J. Holtz,et al.  Acquisition of Position Error and Magnet Polarity for Sensorless Control of PM Synchronous Machines , 2008, IEEE Transactions on Industry Applications.

[4]  Seung-Ki Sul,et al.  Comparison of PM Motor Structures and Sensorless Control Techniques for Zero-Speed Rotor Position Detection , 2006, IEEE Transactions on Power Electronics.

[5]  Robert D. Lorenz,et al.  Transducerless position and velocity estimation in induction and salient AC machines , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[6]  Seung-Ki Sul,et al.  Analysis of permanent-magnet machine for sensorless control based on high-frequency signal injection , 2004, IEEE Transactions on Industry Applications.

[7]  A. Toba,et al.  Sensorless torque control of salient-pole synchronous motor at zero-speed operation , 1999 .

[8]  Pierre Rouchon,et al.  Euler-Lagrange Models With Complex Currents of Three-Phase Electrical Machines and Observability Issues , 2008, IEEE Transactions on Automatic Control.

[9]  B. Polajzer,et al.  Evaluation of experimental methods for determining the magnetically nonlinear characteristics of electromagnetic devices , 2005, IEEE Transactions on Magnetics.

[10]  Robert D. Lorenz,et al.  Carrier-Signal Selection for Sensorless Control of PM Synchronous Machines at Zero and Very Low Speeds , 2010 .

[11]  Hans-Peter Nee,et al.  A general algorithm for speed and position estimation of AC motors , 2000, IEEE Trans. Ind. Electron..

[12]  Kozo Ide,et al.  High bandwidth sensorless algorithm for AC machines based on square-wave type voltage injection , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[13]  P. Guglielmi,et al.  Cross-Saturation Effects in IPM Motors and Related Impact on Sensorless Control , 2006, IEEE Transactions on Industry Applications.

[14]  Alfio Consoli,et al.  Industry application of zero-speed sensorless control techniques for PM synchronous motors , 2001 .

[15]  Nicola Bianchi,et al.  Predicted and measured errors in estimating rotor position by signal injection for salient-pole PM synchronous motors , 2009, 2009 IEEE International Electric Machines and Drives Conference.

[16]  Oskar Wallmark,et al.  An improved speed and position estimator for salient permanent-magnet synchronous motors , 2005, IEEE Transactions on Industrial Electronics.

[17]  F. Parasiliti,et al.  A Model for Saturation Effects in High-Field Permanent Magnet Synchronous Motors , 1989, IEEE Power Engineering Review.

[18]  R. D. Lorenz,et al.  Rotor position and velocity estimation for a salient-pole permanent magnet synchronous machine at standstill and high speeds , 1998 .

[19]  Robert D. Lorenz,et al.  Carrier Signal Selection for Sensorless Control of PM Synchronous Machines at Zero and Very Low Speeds , 2008, 2008 IEEE Industry Applications Society Annual Meeting.

[20]  Xiaojing Huang,et al.  Nonlinear varying-network magnetic circuit analysis for doubly salient permanent-magnet motors , 2000 .

[21]  Marko Hinkkanen,et al.  Analysis of an Adaptive Observer for Sensorless Control of Interior Permanent Magnet Synchronous Motors , 2008, IEEE Transactions on Industrial Electronics.

[22]  P. Garcia,et al.  Measurement and Adaptive Decoupling of Cross-Saturation Effects and Secondary Saliencies in Sensorless-Controlled IPM Synchronous Machines , 2007, 2007 IEEE Industry Applications Annual Meeting.

[23]  Hirofumi Akagi,et al.  An approach to real-time position estimation at zero and low speed for a PM motor based on saliency , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[24]  Z. Q. Zhu,et al.  Investigation of Effectiveness of Sensorless Operation in Carrier-Signal-Injection-Based Sensorless-Control Methods , 2011, IEEE Transactions on Industrial Electronics.

[25]  F. Verhulst,et al.  Averaging Methods in Nonlinear Dynamical Systems , 1985 .

[26]  E. Robeischl,et al.  Optimized INFORM measurement sequence for sensorless PM synchronous motor drives with respect to minimum current distortion , 2002, IEEE Transactions on Industry Applications.

[27]  P. Sergeant,et al.  Effect of Rotor Geometry and Magnetic Saturation in Sensorless Control of PM Synchronous Machines , 2009, IEEE Transactions on Magnetics.

[28]  Khwaja M. Rahman,et al.  Identification of Machine Parameters of a , 2005 .

[29]  N. Bianchi,et al.  Effect of stator and rotor saturation on sensorless rotor position detection , 2013, 2011 IEEE Energy Conversion Congress and Exposition.

[30]  Mark Sumner,et al.  Hybrid rotor position observer for wide speed-range sensorless PM motor drives including zero speed , 2006, IEEE Transactions on Industrial Electronics.

[31]  K. M. Rahman,et al.  Identification of machine parameters of a synchronous motor , 2003 .

[32]  D. Stone,et al.  Improved Rotor Position Estimation by Signal Injection in Brushless AC Motors, Accounting for Cross-Coupling Magnetic Saturation , 2007, 2007 IEEE Industry Applications Annual Meeting.

[33]  G. Pellegrino,et al.  Accurate Modeling and Performance Analysis of IPM-PMASR Motors , 2009, IEEE Transactions on Industry Applications.

[34]  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.

[35]  Jung-Ik Ha,et al.  Sensorless rotor position estimation of an interior permanent-magnet motor from initial states , 2003 .

[36]  M. Trlep,et al.  Evaluation of saturation and cross-magnetization effects in interior permanent magnet synchronous motor , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[37]  Philippe Martin,et al.  Estimation of saturation of Permanent-Magnet Synchronous Motors through an energy-based model , 2011, 2011 IEEE International Electric Machines & Drives Conference (IEMDC).

[38]  S. Shinnaka,et al.  A New Speed-Varying Ellipse Voltage Injection Method for Sensorless Drive of Permanent-Magnet Synchronous Motors With Pole Saliency—New PLL Method Using High-Frequency Current Component Multiplied Signal , 2008, IEEE Transactions on Industry Applications.

[39]  Philippe Martin,et al.  Using Hamiltonians to Model Saturation in Space Vector Representations of AC Electrical Machines , 2010 .

[40]  S. Sul,et al.  Sensorless drive of surface-mounted permanent-magnet motor by high-frequency signal injection based on magnetic saliency , 2003 .