Indirect rotor position sensing in real-time for brushless permanent magnet motor drives

The paper describes a modern solution to real-time rotor position estimation of permanent magnet (PM) motor drives. The estimation scheme, based on flux linkage and line current estimation, is implemented in real-time by using the abc reference frame, and it is tested dynamically, The position estimation model of the test motor, development of hardware and basic operation of the DSP are discussed, The overall position estimation strategy is accomplished with a fast digital signal processor (TMS320C30). The method is a shaft position sensorless method that is applicable to a wide range of excitation types in brushless PM motors without any restriction on the motor model and the current excitation. Both rectangular and sinewave excited brushless PM motor drives are examined and the results are given to demonstrate the effectiveness of the method with dynamic loads.

[1]  T. O'Gorman.  Sensorless control of a permanent magnet machine/gasoline engine using an extended Kalman filter , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[2]  M. Schroedl,et al.  Sensorless control of AC machines at low speed and standstill based on the "INFORM" method , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[3]  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.

[4]  Nesimi Ertugrul.  Position estimation and performance prediction for permanent-magnet motor drives , 1993 .

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

[6]  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.

[7]  R. Krishnan,et al.  Starting algorithm and performance of a PM DC brushless motor drive system with no position sensor , 1989, 20th Annual IEEE Power Electronics Specialists Conference.

[8]  Seung-Ki Sul,et al.  High performance PMSM drives without rotational position sensors using reduced order observer , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.