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Afsharirad, H., Misaghi, S.. (1403). Torque Ripple Reduction by using Virtual Vectors in Direct Torque Control Method using Neutral-Point-Clamped Inverter. فناوری آموزش, 13(1), 197-208. doi: 10.22061/jecei.2024.10894.745
H. Afsharirad; S. Misaghi. "Torque Ripple Reduction by using Virtual Vectors in Direct Torque Control Method using Neutral-Point-Clamped Inverter". فناوری آموزش, 13, 1, 1403, 197-208. doi: 10.22061/jecei.2024.10894.745
Afsharirad, H., Misaghi, S.. (1403). 'Torque Ripple Reduction by using Virtual Vectors in Direct Torque Control Method using Neutral-Point-Clamped Inverter', فناوری آموزش, 13(1), pp. 197-208. doi: 10.22061/jecei.2024.10894.745
Afsharirad, H., Misaghi, S.. Torque Ripple Reduction by using Virtual Vectors in Direct Torque Control Method using Neutral-Point-Clamped Inverter. فناوری آموزش, 1403; 13(1): 197-208. doi: 10.22061/jecei.2024.10894.745

Torque Ripple Reduction by using Virtual Vectors in Direct Torque Control Method using Neutral-Point-Clamped Inverter

Journal of Electrical and Computer Engineering Innovations (JECEI)
مقاله 16، دوره 13، شماره 1، فروردین 2025، صفحه 197-208    اصل مقاله (1.34 M)
نوع مقاله: Original Research Paper
شناسه دیجیتال (DOI): 10.22061/jecei.2024.10894.745
نویسندگان
H. Afsharirad* ؛ S. Misaghi
Department of Electrical Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran.
تاریخ دریافت: 16 مرداد 1403،  تاریخ بازنگری: 04 آبان 1403،  تاریخ پذیرش: 24 آبان 1403 
چکیده
Background and Objectives: Due to the high torque ripple and stator current harmonics in direct torque control using a two-level inverter, the use of multi-level inverters has become common to reduce these two factors. Among the multilevel inverters, the Neutral-point-Clamped Inverter has been given more attention in the industry due to its advantages. This inverter has 27 voltage vectors by which torque and flux are controlled. In order to reduce torque ripple and current harmonic as much as possible, methods such as space vector modulation methods or the use of multi-level inverters with higher levels have been considered. But the main drawback of these methods is the increase of complexity and cost.
Methods: In this article, virtual voltage vectors are used to increase the number of hysteresis controller levels. These vectors are obtained from the sum of two voltage vectors. In this way, we will have 12 voltage vectors in addition to the diode clamped inverter’s voltage vectors. Therefore, we can increase the number of torque hysteresis levels from 7 levels to 11 levels.
Results: Considering that the proposed method uses virtual vectors and voltage vectors, it does not increase the cost and computational complexity. Also, one of the requirements of using this method is the use of fixed switching frequency, which solves the variable switching frequency problem of conventional methods. Therefore, the proposed control reaches an overall optimization.
Conclusion: To verify the feasibility of the proposed method and compare it with the conventional method, both of these methods are simulated in the MATLAB /Simulink environment and the simulation results represent the efficiency of the proposed control method. This method achieves less torque ripple and harmonic current without increasing the cost and computational complexity.
کلیدواژه‌ها
Multi-Level Inverter؛ DTC؛ PMSM؛ Voltage؛ Vector؛ Virtual Vector
مراجع

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