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Correction on Current Measurement Errors for Accurate Flux Estimation of AC Drives at Low Stator Frequency  

Cho, Kyung-Rae (영남대 대학원 전기공학과)
Seok, Jul-Ki (영남대 전기공학과)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.12, no.1, 2007 , pp. 65-73 More about this Journal
Abstract
This paper presents an on-line correction method of current measurement errors for a pure-integration-based flux estimation down to 1-Hz stator frequency. An observer-based approach is taken as one possible solution of eliminating the dc offset and the negative sequence component of unbalanced gains in the synchronous coordinate. At the same time, the positive sequence component estimation is performed by creating an error signal between a motor model reference and an estimated q-axis rotor flux established by a permanent magnet (PM) in the synchronous coordinate. The compensator utilizes a PI controller that controls the error signal to zero. The proposed technique further contains a residual error compensator to completely eliminate miscellaneous disturbances in the estimated flux. The developed algorithm has been implemented on a 1.1-kW permanent magnet synchronous motor (PMSM) drive to confirm the effectiveness of the proposed scheme.
Keywords
Current measurement errors; Flux estimation; Pure-integration; Offset errors; Scaling errors;
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1 J. W. Choi and S. K. Sul, 'Inverter output voltage synthesis using novel dead time compensation,' IEEE Trans. Power Electron., vol.11, pp.221-227, Mar.1996   DOI   ScienceOn
2 D. W. Chung and S. K. Sul, 'Analysis and compensation of current measurement error in vector-controlled AC motor drives,' IEEE Trans. Ind. Appl., vol.34, pp.340-345, Mar./Apr.1998   DOI   ScienceOn
3 H. S. Jung, S. H. Hwang, J. M. Kim, C. U. Kim, and C. Choi, 'Diminution of current measurement error for vector-controlled AC motor drives,' IEEE Trans. Ind. Appl., vol.42, pp. 1249-1256, Sep./Oct. 2006   DOI   ScienceOn
4 M. H. Shin, D. S. Hyun, S. B. Cho, and S. Y. Choe, 'An improved stator flux estimation for speed sensorless stator flux orientation control of induction motors,' IEEE Trans. Power Electron., vol.15, pp. 312-318, Mar. 2000   DOI   ScienceOn
5 B. K. Bose, M. G. Simoes, D. R. Crecelius, K. Rajashekara, and R. Martin, 'Speed sensorless hybrid vector controlled induction motor drive,' in Proc.30th IAS Annu. Meeting, Orlando, FL, Oct.8-12, 1995, pp.137-143
6 M. Marchesoni, P. Segarich, and E. Soressi, 'A simple approach to flux and speed observation in induction motor drives,' IEEE Trans. Ind. Electron., vol. 44, pp. 528-535, Aug. 1997   DOI   ScienceOn
7 C. Silva, G. M. Asher, and M. Sumner, 'Hybrid rotor position observer for wide speed-range sensorless PM motor drives including zero speed,' IEEE Trans. Ind. Electron., vol.53, pp.373-378, Apr.2006   DOI   ScienceOn
8 ABB AC Drives ACS 800 Catalogue, ABB Industrial Systems Ltd, 2003
9 C. H. Choi, K. R. Cho, and J. K. Seok, 'Inverter nonlinearity compensation in the presence of current measurement errors and switching device parameter uncertainties,' IEEE Trans. Power Electron., in press
10 J. H. Jang, S. K. Sul, and Y. C. Son, 'Current measurement issues in sensorless control algorithm using high frequency signal injection method,' in Proc. 30th IAS Annu. Meeting, Oct.12-16 2003, pp.1134-1141
11 R. J. Kerkman, B. J. Seibel, T. M. Rowan, and D. W. Schlegel, 'A new flux and stator resistance identifier for AC drive systems,' IEEE Trans. Ind. Appl., vol.32, pp.585-593, May/June1996   DOI   ScienceOn
12 P. L. Jansen, R. D. Lorenz, and D. W. Novotny, 'Observer-based direct field orientation,' IEEE Trans. Ind .Appl., vol.30, pp.945-953, July/Aug.1994   DOI   ScienceOn
13 J. Holtz and J. Quan, 'Drift and parametercompensated flux estimator for persistent zerostator-frequency operation of sensorless-controlled induction motors,' IEEE Trans. Ind. Appl. vol.39, pp.1052-1060, July/Aug.2003   DOI   ScienceOn
14 S. H. Song, J. W. Choi, and S. K. Sul, 'Current measurements in digitally controlled AC drives,' IEEE Ind. Appl. Magazine, vol.6, pp.51-62, 2000   DOI   ScienceOn
15 N. Urasaki, T. Senjyu, T. Kinjo, T. Funabashi, and H. Sekine, 'Dead-time compensation strategy for permanent magnet synchronous motor drive taking zero-current clamp and parasitic capacitance effects into account,' IEE Proc. Electr. Power Appl., vol.152 , no.4, pp.845-853, July2005   DOI   ScienceOn
16 G. Guidi and H. Umida, 'A novel stator resistance estimation method for speed-sensorless induction motor drives,' IEEE Trans. Ind. Appl., vol.36, pp.1619-1627, Nov./Dec.2000   DOI   ScienceOn
17 M. Comanescu and L. Xu, 'An improved flux observer based on PLL frequency estimator for sensorless vector control of induction motors,' IEEE Trans. Ind. Electron., vol.53, pp.50-56, Feb.2006   DOI   ScienceOn