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Predictive Direct Torque Control of the Doubly Fed Induction Machine with Reduced Torque and Flux Ripples at Low Constant Switching Frequency

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3 Author(s)
Abad, G. ; Fac. of Eng., Mondragon Univ., Arrasate ; Rodriguez, M.A. ; Poza, J.

In this paper, a new direct torque control (DTC) strategy of the doubly fed induction machine (DFIM) is presented. It is especially designed to operate at a considerably low constant switching frequency, reducing the electromagnetic torque and rotor flux ripples, in order to provide good steady-state and fast dynamic performances, for high power drive and generator applications, with restricted switching frequency. The DFIM is connected to the grid by the stator and the rotor is fed by a two level voltage source converter. In addition, this control method allows to implement a technique that reduces the switching power losses of the converter. Finally, simulation results show that the proposed DTC method, effectively reduces the torque and flux ripples at low switching frequency, even under variable speed operation conditions

Published in:

IEEE Industrial Electronics, IECON 2006 - 32nd Annual Conference on

Date of Conference:

6-10 Nov. 2006