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Vol: 51(65) No: 4 / December 2006 Start up Current in Direct Torque Controlled Induction Motor Drives Vojkan Kostic Department of Power Engineering, University of Nis, Faculty of Electronic Engineering, Aleksandra Medvedeva 14, 18000 Nis, Serbia, phone: (+381) 18 529 422, e-mail: vkostic@elfak.ni.ac.yu Nebojsa Mitrovic Department of Power Engineering, University of Nis, Faculty of Electronic Engineering, Aleksandra Medvedeva 14, 18000 Nis, Serbia Milutin Petronijevic Department of Power Engineering, University of Nis, Faculty of Electronic Engineering, Aleksandra Medvedeva 14, 18000 Nis, Serbia Milan Bebic Department of Power Engineering, University of Belgrade, Faculty of Electrical Engineering, Bulevar Revolucije 73, 11000 Beograd, Serbia, phone: (+381) 11 3218 363, e-mail: bebic@etf.bg.ac.yu Keywords: induction motor, Direct Torque Control, start up stator current limitation. Abstract In this paper DTC method is analysed with aspect of start up stator current. It is observe that start up stator current reach significant value. It can destroy switch powers of the inverter. A control method to limit start up stator current amplitude is presented. Simulations results are carried out for the comparison of a start up classical DTC scheme without current limitation and with hereby. Presented experimental results verify the effectiveness of the proposed stator current limitation strategy. References [1] I. Takahashi and T. Noguchi, “A new quick-response and high-efficiency control strategy of an induction motor,” IEEE Transactions on Industry Applications, vol. 22, no. 5, pp. 820-827, 1986. [2] T. G. Habatler, F. Profumo, M. Pastorelli and L. Tolbert, “Direct torque control of induction machines using space vector modulation”, IEEE Transactions on Industry Applications, vol. 28, no. 5, pp. 1045-1053, Sept.-Oct. 1992. [3] V. Kostić, N. Mitrović, M. Petronijević and B. Jeftenić, “Direct torque control of induction machine”, Proceedings of 12th International Symposium on Power Electronics Ee 2003, Novi Sad, Serbia & Montenegro, 2003, Paper No. T2-1.5, pp. 1-4. [4] N. Mitrovic, V. Kostic, M. Petronijevic and B. Jeftenic, “Comparison by Simulation of Torque Control Schemes for Electric Drive Application”, Proceedings of ICEST 2003 Conference, 2003, Sofia, Bulgaria, pp. 417-420. [5] N. Mitrovic, V. Kostic, M. Petronijevic and B. Jeftenic, “Simulation of Direct Torque Control Schemes for Electric Drive Application, Part I”, Scientific Bulletin of “Politehnica” University of Timisoara, Transactions on Automatic Control and Computer Science, vol. 49(63), no. 1, pp. 83-86, 2004. [6] Y. A. Chapuis and D. Roye, “Direct torque control and current limitation method in start up of an induction machine”, Proceedings of IEE Conference on Power Electronics and Variable Speed Drives, London, UK, 1998, pp. 451-455. [7] Y. A. Chapuis, T. Kosaka and N. Matsui, “Performance improvement in start up condition for DSP-based direct torque control of an induction machine”, Proceedings of International Power Electronic Conference, IPEC\'00, Tokyo, Japan, 2000, vol. 3, pp. 1189-1194. [8] J. Hu and B. Wu, “New integration algorithms for estimating motor flux over a wide speed range”, IEEE Transactions on Power Electronics, vol. 13, no. 5, pp. 969-977, Sept. 1998. |