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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS)
Tarusan, Siti Azura Ahmad
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Control & Systems Engineering Electrical & Electronics Engineering

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Optimizing low-speed DTC performance for three-phase induction motors with sector rotation strategy Sabri, Nurul Syahada Muhamad; Tarusan, Siti Azura Ahmad; Zawawi, Syed Abrar S. A.; Jidin, Auzani; Sutikno, Tole
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 16, No 1: March 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v16.i1.pp464-471

Abstract

This paper proposes a modification to the direct torque control (DTC) strategy for induction motors, focusing on improving flux performance at lower speeds. The method employs a sector rotation strategy to address stator flux droop, which occurs in conventional DTC due to the impact of stator resistance at low speed becoming more significant. This constrains the ability of the flux vector to be tangential to the voltage vector in the default sector. Consequently, an improper flux locus leads to distortion of the phase currents which disrupts precise control of torque. The proposed approach dynamically adjusts the sector angle to mitigate flux droop while maintaining the simplicity and original structure of DTC. The new sector rotation strategy is validated through simulations in MATLAB/Simulink to demonstrate the effectiveness of the proposed method in reducing stator flux droop. These findings have potential applications in the industrial sector and electric vehicles, where stable motor operation and smoother driving performance at low speeds are crucial for precise control operation.
Co-Authors Auzani Jidin Sabri, Nurul Syahada Muhamad Tole Sutikno Zawawi, Syed Abrar S. A.