Title: Five-level diode-clamped inverter-fed induction motor drive system

Authors: Abdelnasser Nafeh; El-Sayed El-Tantawy; Ashraf Hagras

Addresses: Department of Electrical Engineering, Faculty of Engineering, University of Benha, Benha 13512, Egypt ' Department of Electrical Engineering, Faculty of Engineering, University of Benha, Benha 13512, Egypt ' Department of Engineering and Scientific Apparatus, Cyclotron Project, Egyptian Atomic Energy Authority, Abo Zaabal, Cairo 13759, Egypt

Abstract: Multi-level inverters give a clear solution to bring the advantages of speed controlled induction motor drive. A nine-level hysteresis based direct torque control was proposed to provide accurate mapping of the torque errors and to prove five-level inverter diode-clamped multi-level inverter (DCMLI) superior performance compared to two-level inverter. The practical design of control system was given in detail. The proposed control strategy guaranteed excellent dynamic and steady state characteristics. The simulation results using MATLAB/SIMULINK show its superior performance in terms of torque and flux ripples decreasing and source current harmonics minimisation. The experimental implementation of the five-level DCMLI fed induction motor in open loop mode validated its theoretical analysis in the proposed strategy.

Keywords: direct torque control; DTC; five-level; diode-clamped multi-level inverter; DCMLI; nine-level hysteresis torque controller; space vector PWM; induction motor.

DOI: 10.1504/IJPELEC.2023.132977

International Journal of Power Electronics, 2023 Vol.18 No.2, pp.119 - 138

Received: 23 Aug 2021
Accepted: 14 May 2022
Published online: 22 Aug 2023 *

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