Sensorless Capability of Fractional-Slot Surface-Mounted PM Motors

This paper investigates the capability of sensorless rotor position detection by means of injection of a high-frequency (HF) signal of fractional-slot surface-mounted permanent-magnet (PM) motors. In order to create an HF anisotropy, such motors are characterized by the presence of a ring around each pole. For the sake of completeness, different windings are considered: a distributed coil winding and a concentrated coil winding. The effect of eddy currents in the magnets, due to the HF signal, is also considered. The effect of the slot opening is also taken into consideration. Finally, the comparison with two different PM rotor topologies is addressed: an interior PM motor and an INSET motor.

[1]  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.

[2]  Robert D. Lorenz,et al.  Rotor position estimation for permanent magnet synchronous motor using saliency-tracking self-sensing method , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[3]  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..

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

[5]  Seung-Ki Sul,et al.  Advantages of Inset PM Machines for Zero-Speed Sensorless Position Detection , 2008, IEEE Transactions on Industry Applications.

[6]  Nobuyuki Matsui,et al.  A new flux-barrier design of torque ripple reduction in saliency-based sensorless drive IPM motors for general industrial applications , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[7]  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.

[8]  S. Bolognani,et al.  Sensorless control of IPM motors in the low-speed range and at stand-still by HF-injection and DFT processing , 2009, 2009 IEEE International Electric Machines and Drives Conference.

[9]  G Pellegrino,et al.  Core Losses and Torque Ripple in IPM Machines: Dedicated Modeling and Design Tradeoff , 2010, IEEE Transactions on Industry Applications.

[10]  Nicola Bianchi,et al.  A ringed-pole SPM motor for sensorless drives - electromagnetic analysis, prototyping and tests , 2010, 2010 IEEE International Symposium on Industrial Electronics.

[11]  N. Bianchi,et al.  Ringed-Pole Permanent-Magnet Synchronous Motor for Position Sensorless Drives , 2011, IEEE Transactions on Industry Applications.