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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
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