Browse > Article

A Robust MRAC-based Speed Estimation Method to Improve the Performance of Sensorless Induction Motor Drive System in Low Speed  

박철우 (경북대 전자공학과)
권우현 (경북대 전자공학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers B / v.53, no.1, 2004 , pp. 37-46 More about this Journal
Abstract
A novel rotor speed estimation method using model reference adaptive control(MRAC) is proposed to improve the performance of a sensorless vector controller. In the proposed method, the stator current is used as the model variable for estimating the speed. In conventional MRAC methods, the relation between the two model errors and the speed estimation error is unclear. In the proposed method, the stator current error is represented as a function of the first degree for the error value in the speed estimation. Therefore, the proposed method can produce a fast speed estimation. The robustness of the rotor flux-based MRAC, back EMF-based MRAC, and proposed MRAC is compared based on a sensitivity function about each error of stator resistance, rotor time constant, mutual inductance. Consequently, the proposed method is much more robust than the conventional methods as regards errors in the mutual inductance, stator resistance. Therefore, the proposed method offers a considerable improvement in the performance of a sensorless vector controller at a low speed. In addition, the superiority of the proposed method and the validity of sensitivity functions were verified by simulation and experiment.
Keywords
speed estimation; sensitivity function; sensorless vector control; induction motor; MRAC;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 F. Profumo, G. Griva, M. Pastrorelli, and J. C. Moreira, 'Universal field oriented controller based on airgap flux sensing via third harmonic stator voltage,' IEEE Trans. Ind. Appl., vol. 30, no. 2, pp. 448-455, September/October, 1994   DOI   ScienceOn
2 H. Kubota and K. Matsuse, 'Speed sensorless field-oriented control of induction motor with rotor resistance adaptation,' IEEE Trans. Ind. Appl., vol. 30, no. 5, pp. 1219-1224, September/October, 1994   DOI   ScienceOn
3 G. J. Armstrong, D. J. Atkinson, P. P. Acarnley, 'A comparison of estimation technique for sensorless vector controlled induction motor drives,' Power Electronics and Drive Systems, vol. 1, pp. 110-116, 1997   DOI
4 M. N. Marwali and A. Keyhani, 'A comparative study of rotor flux based MRAS and back EMF based MRAS speed estimators for speed sensorless vector control of induction machines,' IEEE-LAS Annual Meeting, pp. 160-166, 1997   DOI
5 S. Doki, S. Sanwongwanich and S. Okuma, 'Implementation of speed sensorless field oriented vector control using adaptive sliding observer,' IEEE/LECON, pp. 453-458, 1992
6 C. Schauder, 'Adaptive Speed identification for vector control of induction motor without rotational transducers,' IEEE Trans. Ind. Appl., vol. 28, no. 5, pp. 1054-1061, September/October, 1992   DOI   ScienceOn
7 F. Z. Peng and T. Fukao, 'Robust speed identification for speed-sensorless vector control of induction motors,' IEEE Trans. Ind. Appl., vol. 30, no. 5, pp. 1234-1240, September/October, 1994   DOI   ScienceOn
8 Y. R. Kim, S. K. Sul, and M. H. Park, 'Speed sensorless vector control of an induction motor using an extended kalman filter,' IEEE Trans. Ind. Appl, vol. 30, no. 5, pp. 1225-1233, September/October, 1994   DOI   ScienceOn
9 Y. S. Kim, S. U. Kim, and I. W. Yang, 'Implementation of a speed sensorless vector control of induction motor by reduced-order extended kalman filter,' IEEE-IAS Annual Meeting, pp. 197-203, 1995
10 R. Blasco-Gimenez, G. M. Asher, M. sumner, and K. J. Bradley, 'Dynamic performance limitations for MRAS based sensorless induction motor drives. Part 1: Stability analysis for the closed loop drive,' LEE Proc. Electr. Power Appl., vol. 143, no. 2, pp. 113-122, March, 1996   DOI   ScienceOn
11 Peter Vas, Sensorless vector and direct torque control, Oxford University Press, 1998
12 K. H. Chao and C. M. Liaw, 'Speed sensorless control performance improvement of induction motor drive using uncertainty cancellation,' LEE Proc. Electr. Power Appl., vol. 147, no. 4, pp. 251-262, July, 2000   DOI   ScienceOn