Sensorless vector control operation of a PMSM by rotating high-frequency voltage injection approach

Based on analyzing the mathematic model of a permanent magnet synchronous motor (PMSM) excited by a set of high-frequency voltage signals, a novel rotor position self-estimation method was investigated in this paper. The rotating high-frequency voltage-signal injection method, the heterodyning algorithm for the extraction of the high-frequency negative-sequence current, which contains rotor space-position information, and the structure of the rotor position tracking observer were all discussed. Further more, the experimental investigation for the complete signal processing of the rotor space-saliency detection by the rotating high-frequency voltage-signal injection was conducted with a inset-type PMSM and the sensorless vector control operation was realized with success as well. The experimental results indicate that the rotor position self-estimation scheme, based on the rotor saliency-tracking approach, is capable of precisely estimating the rotor space-position and speed and the sensorless vector control operation of the PMSM using the proposed rotor position estimation method possesses acceptable static and dynamic performance.

[1]  Robert D. Lorenz,et al.  Measuring the location of saliencies in AC machines , 1998, IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200).

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

[4]  Wang Limei,et al.  Sensorless control of permanent magnet synchronous motor , 2000, Proceedings IPEMC 2000. Third International Power Electronics and Motion Control Conference (IEEE Cat. No.00EX435).

[5]  Qin Feng.  Rotor position sensorless estimation for permanent magnet synchronous motors , 2004 .

[6]  Robert D. Lorenz,et al.  Position estimation in induction machines utilizing rotor bar slot harmonics and carrier-frequency signal injection , 2000 .

[7]  Robert D. Lorenz.  Practical issues and research opportunities when implementing zero speed sensorless control , 2001, ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501).