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۱Optimization of DTC in BLDC using KH algorithm
اطلاعات انتشار: اولین کنفرانس بین المللی دستاوردهای نوین پژوهشی در مهندسی برق و کامپیوتر، سال
تعداد صفحات: ۷
Brushless Direct Current (BLDC) motors are widely used in various applications due to large torque to inertia, low maintenance and high efficiency. The Direct Torque Control (DTC) presents a fast dynamic response with little steady state error. However, the main drawback of DTC is the high torque ripple in high performance operation conditions. This paper proposes a novel optimization scheme to achieve high dynamic response with low torque ripple in a DTC based BLDC control system. In this method, Krill Herd (KH) optimization algorithm is used to optimize PI–controller coefficients of speed controller in a DTC BLDC drive system. The optimization is carried out to minimize speed tracking error and torque ripples, simultaneously. In order to evaluate the performance of the proposed scheme, the system response is studied under large reference speed changes. To more validation, dynamic response of the DTC BLDC drive system under KH optimization algorithm is compared with well–known PSO algorithm. Simulation results demonstrate lower speed oscillation, shorter settling time, lower overshoot for speed and torque response using proposed scheme.<\div>

۲Optimization of sensorless FOC control of PMSM using GWO algorithm
اطلاعات انتشار: اولین کنفرانس بین المللی دستاوردهای نوین پژوهشی در مهندسی برق و کامپیوتر، سال
تعداد صفحات: ۸
Due to the simplicity, high precision and effectiveness, the vector control based methods are widely used in permanent magnet synchronous motor (PMSM) drives. However, determination of appropriate PI–controller coefficients is an essential task for such controllers. In this paper, a novel Gray Wolf Optimization (GWO) algorithm is implemented in a sensorless field oriented control based PMSM drive control system. The GWO algorithm optimizes the speed and torque loop PI–controller coefficients to achieve a high dynamic response. The proposed optimization scheme minimizes speed tracking error in a discrete mode based PMSM control system. A steady state speed estimator is used to eliminate mechanical speed sensor which leads to less complexity and cost. In order to evaluate the proposed method, the overall system is studied under various operation conditions. Simulation results with MATLAB\Simulink software in discrete mode analysis demonstrate low speed oscillation, short settling time, low overshoot and undershoot, small torque ripple, and high robustness against load torque changes and machine parameter variations by using the proposed scheme.<\div>
نمایش نتایج ۱ تا ۲ از میان ۲ نتیجه