Title: Conventional inverter emulation-based DTC strategy dedicated to delta inverter

Authors: Imen Nouira El Badsi; Bassem El Badsi; Ahmed Masmoudi

Addresses: Laboratory of Renewable Energies and Electric Vehicles, University of Sfax, P.O. Box 1173, 3038 Sfax, Tunisia ' Laboratory of Renewable Energies and Electric Vehicles, University of Sfax, P.O. Box 1173, 3038 Sfax, Tunisia ' Laboratory of Renewable Energies and Electric Vehicles, University of Sfax, P.O. Box 1173, 3038 Sfax, Tunisia

Abstract: The paper proposes a novel direct torque control (DTC) strategy for induction motor (IM) drives fed by (B3-VSI). The introduced strategy, noted DTC^Emu_B3, is based on the emulation of the operation of the conventional inverter (B6-VSI). The limitation associated with the reduced number of the intrinsic voltage vectors generated by the B3-VSI has been eradicated by suitable synthesis of the look-up table incorporated in the DTC scheme. A suitable combinations of the three voltage vectors intrinsically generated by the B3-VSI, lead to the synthesis of the six balanced voltage vectors of the B6-VSI. This approach has been adopted in the design of the look-up table of the proposed DTC strategy. Simulation and experimental results have revealed that B3-VSI fed IM drives exhibit interesting performance. These have been experimentally validated.

Keywords: direct torque control; DTC; induction motor drive; conventional inverter; reduced structure inverter; emulation; look-up table.

DOI: 10.1504/IJPELEC.2021.111858

International Journal of Power Electronics, 2021 Vol.13 No.1, pp.45 - 65

Received: 02 Jan 2018
Accepted: 15 Jul 2018
Published online: 17 Dec 2020 *

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