Modelling magnetic saturation effects in IPMSMs for use in sensorless saliency based methods

A model of the IPMSM with magnetic saturation is presented. The model is based on flux linkage data from a finite element model where the anhysteretic BH curve is included in the material properties of the stator and rotor. The simulated flux linkage data are used in a modified IPMSM dq model using two look up tables. Using the modified IPMSM model with the flux linkage data, simulation results are obtained and corn- paired with experimental results. Both simulation and experimental results reveals a large but similar significant differential inductance variation. The inductance variation may influence sensorless saliency based methods which is based on the inductance in the d- and q-axis of the machine. The post processing of the results gave rise to a sensorless position estimation method based on principle component analysis (PCA).

[1]  Ralph Kennel,et al.  Sensorless position control of permanent magnet synchronous machines without limitation at zero speed , 2002, IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02.

[2]  G. Friedrich,et al.  A cross saturation model for interior permanent magnet synchronous machine. Application to a starter-generator , 2004, Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting..

[3]  T. Frenzke.  Impacts of cross-saturation on sensorless control of surface permanent magnet synchronous motors , 2005, 2005 European Conference on Power Electronics and Applications.

[4]  N. Bianchi,et al.  Influence of rotor geometry of an interior PM motor on sensorless control feasibility , 2005, Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005..

[5]  M. Schrodl,et al.  Statistic properties of the INFORM method for highly dynamic sensorless control of PM motors down to standstill , 2003, IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468).

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

[7]  Hirofumi Akagi,et al.  Performance evaluations of a position-sensorless IPM motor drive system based on detection of current switching ripples , 2000, 2000 IEEE 31st Annual Power Electronics Specialists Conference. Conference Proceedings (Cat. No.00CH37018).

[8]  L. Vandevelde,et al.  A nonlinear model for synchronous machines to describe high-frequency signal based position estimators , 2005, IEEE International Conference on Electric Machines and Drives, 2005..

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

[10]  Seung-Ki Sul,et al.  Initial rotor position estimation of an interior permanent magnet synchronous machine using carrier-frequency injection methods , 2003, IEEE International Electric Machines and Drives Conference, 2003. IEMDC'03..

[11]  Mark Sumner,et al.  Performance of HF signal injection techniques for zero-low-frequency vector control of induction Machines under sensorless conditions , 2006, IEEE Transactions on Industrial Electronics.

[12]  Audra E. Kosh,et al.  Linear Algebra and its Applications , 1992 .

[13]  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).

[14]  P. Guglielmi,et al.  Cross saturation effects in IPM motors and related impact on zero-speed sensorless control , 2005, Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005..

[15]  R.D. Lorenz,et al.  Carrier signal injection based sensorless control methods for IPM synchronous machine drives , 2004, Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting..