A novel switching table for a modified three-level inverter-fed DTC drive with torque and flux ripple minimization


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Farajpour, Y., Alzayed, M., Chaoui, H. et Kelouwani, S. (2020). A novel switching table for a modified three-level inverter-fed DTC drive with torque and flux ripple minimization. Energies, 13 (18). p. 4646. ISSN 1996-1073 DOI 10.3390/en13184646

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The use of a direct torque control (DTC) drive is a well-known control strategy that is applied frequently to induction motors. Although torque and stator flux ripples are major disadvantages of this approach, using a higher-level inverter helps to overcome these issues. In this paper, we propose a novel switching table with a modified control strategy for a three-level inverter to achieve ripple minimization, as well as smooth switching and neutral point balance; the latter features are generally ignored in many works. The proposed model is compared with a conventional DTC and an improved three-level inverter-fed voltage vector synthesis model in the Matlab/Simulink® environment with low, normal, and high-speed operation under load torque disturbances. The performance indexes and the comparative results confirm the effectiveness of the proposed model in reducing the torque and stator flux ripples by up to 70 % and 78 % , respectively, generating a lower total harmonic distortion (THD%) in all scenarios, in addition to maintaining the neutral point balance and preventing voltage jumps across the switches of the inverter.

Type de document: Article
Mots-clés libres: Direct torque control Neutral-point-clamped (NPC) Switching table Three-level inverter Torque ripple Total harmonic distortion
Date de dépôt: 12 avr. 2023 12:51
Dernière modification: 12 avr. 2023 12:51
Version du document déposé: Version officielle de l'éditeur
URI: https://depot-e.uqtr.ca/id/eprint/10632

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