توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Time–Domain Analysis of Electromagnetic Field Distribution inside a TEM Cell
اطلاعات انتشار: دهمین کنفرانس دانشجویی مهندسی برق ایران، سال
تعداد صفحات: ۴
Transverse electromagnetic mode cells (TEMCells) are used for electromagnetic compatibility measurements and biomedical applications. Since The source excitations and the field distributions are usually in the shape of transient pulses, A time–domain method is used for analyzing the electromagnetic field distributions inside a TEM cell. This paper employs The method of moments to solve the governing Electric Field Integral Equation. The metallic structure of the cell is modeled as a grid of conducting wires and then the method is applied to the structure. Having obtained the field distribution inside the cell, one can specify the uniform region inside the cell, wave impedance and the voltage standing wave ratio of the cell, which determines the usable bandwidth of the cell.<\div>

۲Direct Torque Control of Brushless DC Motor Drives Using Fuzzy Incremental Control
اطلاعات انتشار: بیست و ششمین کنفرانس بین المللی برق، سال
تعداد صفحات: ۷
This paper describes a direct torque control technique for Brushless DC motors with nonsinusoidal back electromotive force. Direct torque control has some benefits such as faster torque response and reduced torque ripple for driving the Brushless DC motors. Because of ignoring stator flux linkage in direct torque control in constant torque region, driving of brushless DC motors is not complicated. Mechanical–rotor inertia and friction coefficient are estimated using Recursive Least Square identification technique. Fuzzy Incremental Control is also applied as an adaptive controller, to improve the speed control process, versus the varying in motor parameters. Rising time reduced due to using Fuzzy Incremental, in comparison with PI controller. Particle Swarm Optimization (PSO) has been used to regulate the PI parameter of speed controller. System configuration, operation principle and control methods are presented in detail. The effectiveness of proposed system has been validated by simulation results.<\div>
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