Impact of Rotor Design on Sensorless Position Estimation

The impact of rotor design on the accuracy of a saliency based zero-speed sensorless position estimation technique is investigated. An existing prototype machine is used as the basis of the development and a number of possible buried magnet rotor designs are analysed before an optimal design is selected. It is shown that whilst it is possible to achieve the desired torque from a number of rotor variants, only a limited number of these are suitable for sensorless position estimation. Experimental results confirm the initial finite element based analyses

[1]  M. Ehsani,et al.  A novel position sensor elimination technique for the interior permanent-magnet synchronous motor drive , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[2]  Roberto Oboe,et al.  Sensorless full-digital PMSM drive with EKF estimation of speed and rotor position , 1999, IEEE Trans. Ind. Electron..

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

[4]  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.

[5]  Shin-ichi Kondo,et al.  Armature current locus based estimation method of rotor position of permanent magnet synchronous motor without mechanical sensor , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[6]  Robert D. Lorenz,et al.  Using multiple saliencies for the estimation of flux, position, and velocity in AC machines , 1997 .

[7]  Kenichi Iizuka,et al.  Microcomputer Control for Sensorless Brushless Motor , 1985, IEEE Transactions on Industry Applications.

[8]  K.J. Tseng,et al.  Nonlinear control of interior permanent magnet synchronous motor , 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).

[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]  R. Wu,et al.  A permanent magnet motor drive without a shaft sensor , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[11]  H. Akagi,et al.  An approach to position sensorless drive for brushless DC motors , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[12]  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.

[13]  Salvatore Musumeci,et al.  Sensorless vector and speed control of brushless motor drives , 1994, IEEE Trans. Ind. Electron..

[14]  H. Akagi,et al.  Rotor position estimation based on magnetic saliency of an IPM motor-realization of a wide-speed range from zero to the rated speed , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).

[15]  D. Holliday,et al.  Zero Speed Sensorless Position Detection for Permanent Magnet Synchronous Machines , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[16]  Nobuyuki Matsui,et al.  Sensorless PM brushless DC motor drives , 1996, IEEE Trans. Ind. Electron..

[17]  R. Wrobel,et al.  Sensorless Control of Permanent Magnet Machine Drives for Aerospace Applications , 2005, 2005 International Conference on Power Electronics and Drives Systems.