A Rotor Position Detecting Method Based on Signal Injection for LCI Fed Electrically Excited Synchronous Motors

A new rotor position sensorless detecting method based on high power electrically excited synchronous motors is proposed. The central idea is the back electromotive forces contain the information of rotor position, when a high frequency signal is injected in the rotor by excitation part. So the rotor position can be obtained by detection and calculation of motor back electromotive forces. By experimental verification, high frequency signal injection method has a very good effect and can eliminate the negative impact of opposite rotating direction and pulsation problem at the early in the starting process.

[1]  S. Nishikata,et al.  A sensorless rotor position detecting method for self-controlled synchronous motors , 2008, 2008 International Conference on Electrical Machines and Systems.

[2]  Nesimi Ertugrul,et al.  A new algorithm for sensorless operation of permanent magnet motors , 1992, Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting.

[3]  Xiao Xi.  Speed and Flux Linkage Observer for Permanent Magnet Synchronous Motor Based on EKF , 2007 .

[4]  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.

[5]  S. Nishikata,et al.  A simple starting method for self-controlled synchronous motors in electric propulsion systems for ships , 2007, 2007 European Conference on Power Electronics and Applications.

[6]  Shoji Nishikata,et al.  A sensorless starting method for self-controlled synchronous motors without damper windings using a DC chopper in the exciter circuit , 2011, 2011 International Conference on Electrical Machines and Systems.

[7]  Xu Dianguo.  Position Sensorless Control for Interior Permanent Magnet Synchronous Motor , 2010 .

[8]  Matti Leppänen.  Low-frequency signal-injection method for speed sensorless vector control of induction motors , 2003 .

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

[10]  Bin Wu,et al.  New integration algorithms for estimating motor flux over a wide speed range , 1997 .

[11]  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.

[12]  J. Luomi,et al.  Flux observer enhanced with low-frequency signal injection allowing sensorless zero-frequency operation of induction motors , 2003, 38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003..

[13]  Seung-Ki Sul,et al.  New approach for high-performance PMSM drives without rotational position sensors , 1997 .

[14]  An Quntao.  Sliding Mode Control of Permanent Magnet Synchronous Motor Based on a Novel Exponential Reaching Law , 2011 .

[15]  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.