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Problems of Stator Flux Estimation in DTC of PMSM Drives
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 Title & Authors
Problems of Stator Flux Estimation in DTC of PMSM Drives
Kadjoudj, M.; Golea, N.; Benbouzid, M.E.H;
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The DTC of voltage source inverter-fed PMSMs is based on hysteresis controllers of torque and flux. It has several advantages, namely, elimination of the mandatory rotor position sensor, less computation time, and rapid torque response. In addition, the stator resistance is the only parameter, which should be known, and no reference frame transformation is required. The DTC theory has achieved great success in the control of induction motors. However, for the control of PMSM drives proposed a few years ago, there are many basic theoretical problems that must be clarified. This paper describes an investigation into the effect of the zero voltage space vectors in the DTC system and points out that if using it rationally, not only can the DTC of the PMSM drive be driven successfully, but torque and flux ripples are reduced and overall performance of the system is improved. The implementation of DTC in PMSM drives is described and the switching tables specific for an interior PMSM are derived. The conventional eight voltage-vector switching table, which is namely used in the DTC of induction motors does not seem to regulate the torque and stator flux in a PMSM well when the motor operates at low speed. Modelling and simulation studies have both revealed that a six voltage-vector switching table is more appropriate for PMSM drives at low speed. In addition, the sources of difficulties, namely, the error in the detection of the initial rotor position, the variation of stator resistance, and the offsets in measurements are analysed and discussed.
DTC;Flux estimation;Offset in measurement;PMSM;Switching tables;
 Cited by
Flexible Dimensioning Opportunities of a (Virtual) Flux-Based Hysteresis Controller for a Reduced Switching Frequency, IEEE Transactions on Industry Applications, 2016, 52, 4, 3451  crossref(new windwow)
A. Llor, B. Allard, X. Lin-Shi, J.M. Rtif, 'Comparison of DTC implementations for synchronous machines,' 35th annual IEEE power electronics conference, Aachen Germany, pp. 3581-3587, 2004

M. Kadjoudj, M.E. Benbouzid, C. Ghennai, D.Diallo, 'A Robust hybrid current control for PMSM drives,' IEEE trans. on energy conversion, vol. 19, No. 1, pp. 109-115, 2004 crossref(new window)

J.X. Xu, S.K. Panda, Y.J. Pan, T.H. Lee, B.H. Lam, 'A Modular control scheme for PMSM speed control with pulsating torque minimization,' IEEE trans. on industrial electronics, vol. 51, No. 3, pp. 526-530, June 2004 crossref(new window)

L. Tang, L. Zhong, M. Rahman and Y.Hu, 'A Novel direct synchronous machine drive with fixed switching frequency,' IEEE trans. on power electronics, vol. 19, No. 2, pp. 262-271, March 2004

J. Faiz, H.M. Zonoozi, 'A Novel technique and control of stator flux of a salient pole PMSM in DTC method based on MTPF,' IEEE trans. on industrial electronics, vol. 50 No 2. pp. 262-271, April 2003 crossref(new window)

M. Kadjoudj, S. Taibi, N. Golea, M.E. Benbouzid, 'Modified DTC of PMSM drives with dither signal injection and nonhysteresis controller,' Electromot. Journal, vol. 13, No. 4, pp. 262-270, 2006

J.K. Kang, S.K. Sul, 'New direct torque control of induction motor for minimum torque ripple and constant switching frequency,' IEEE Trans. On ind. Appl., vol. 35, No. 5, pp. 1076-1082, 1999 crossref(new window)

S.K. Chung and al., 'A new instantaneous torque control of PMSM for high performance direct drive applications,' IEEE Trans. Power Electronics, vol. 13, No. 3, pp. 388-400, 1998 crossref(new window)

M.F. Rahman, M.E. Haque, L. Tang, L. Zhong, 'Problems associated with the DTC of an interior PMSM drive and their remedies,' IEEE trans. on industrial electronics, vol. 51, No. 4, pp. 799-808, August 2004 crossref(new window)

C. French, P. Acarnley, 'Direct torque control of permanent magnet drives,' IEEE Trans. On ind. Appl., vol. 32, no. 5, pp. 1080-1088, 1996 crossref(new window)

C. Lascu, I. Boldea, F. Blabjerg, 'A modified direct torque control for induction motor sensorless drive,' IEEE Trans. On ind. Appl., vol. 36, no. 1, pp. 22-30, 2000 crossref(new window)

J.K. Kang, D. Chang, S.K. Sul, 'DTC of induction machine with variable amplitude control of flux and torque hysteresis bands,' conf. of the IEEE, vol. 1, pp. 640-642, 1999

M. Pacas, J. Weber, 'Predictive direct torque control for the PM synchronous machine,' IEEE trans. on industrial electronics, vol. 52, No. 5, pp. 1350-1356, October 2005 crossref(new window)

J. Luukko, O. Pyrhonen, M. Niemela, J. Pyrhonen, 'Limitation of the load angle in a direct torque controlled synchronous machine drive,' IEEE trans. on industrial electronics, vol. 51, No. 4, pp. 793-798, August 2004 crossref(new window)