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Open AccessArticle

Simulation Study of Two Torque Optimization Methods for Direct Torque-Controlled Induction Motors

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Electrical Engineering Department, Faculty of Engineering, University of Tabuk, Tabuk 47913, Saudi Arabia
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Department of Electrical Power, Faculty of Engineering, Cairo University, Cairo 12613, Egypt
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Department of Electrical and Electronic Engineering, Faculty of Engineering, University Malaysia Sarawak, Kota Samarahan 94300, Malaysia
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Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(24), 5547; https://doi.org/10.3390/app9245547
Received: 19 August 2019 / Revised: 10 December 2019 / Accepted: 12 December 2019 / Published: 16 December 2019
The simplicity and excellent dynamic performance of Direct Torque Control (DTC) make Induction Motor (IM) drives attractive for many applications that require precise torque control. The traditional version of DTC uses hysteresis controllers. Unfortunately, the nature of these controllers prevents the optimization of the inverter voltage vectors inside the flux hysteresis band. The inverter voltage vector optimization can produce fast torque response of the IM drive. This research proposes two torque optimization methods for IM systems utilizing DTC. Analysis and Matlab simulations for the proposed optimization methods prove that the torque and, consequently, the speed responses, are greatly improved. The performances of the drive system controlled by the proposed optimization methods and the traditional DTC are compared. Conversely, the effects of the parameters on the proposed optimization methods are introduced. The proposed methods greatly improve the torque and speed dynamic performances against the traditional DTC technique. However, one of the proposed optimization methods is more sensitive to IM parameter variations than the other. View Full-Text
Keywords: induction motor (IM); direct torque control (DTC); voltage vector; optimization induction motor (IM); direct torque control (DTC); voltage vector; optimization
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Albalawi, H.; Zaid, S.A.; Buswig, Y.M. Simulation Study of Two Torque Optimization Methods for Direct Torque-Controlled Induction Motors. Appl. Sci. 2019, 9, 5547.

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