بهبود عملکرد موتور سنکرون مغناطیس دایم با استفاده از روش کنترل مستقیم جریان مبتنی بر کنترل¬کننده پیش¬بین با مجموعه کنترلی پیوسته
محورهای موضوعی : کاربرد محاسبات نرم در علوم مهندسیرضا شریفیان 1 , حمید رحیمی اصفهانی 2
1 - گروه مهندسی برق، واحد لنجان، دانشگاه آزاد اسلامی، اصفهان، ایران
2 - گروه مهندسی برق، واحد لنجان، دانشگاه آزاد اسلامی، اصفهان، ایران
کلید واژه: کنترل مستقیم جریان, کنترل کننده پیش¬بین, محرکه¬های موتور سنکرون مغناطیس دايم, اعوجاج هارمونیک کل,
چکیده مقاله :
در این مقاله از روش کنترل مستقیم جریان، جهت بهبود عملکرد موتور سنکرون مغناطیس دائم در حالتهای دائمی و گذرا پیشنهاد شده است. در این روش، کنترل مستقیم جریان مبتنی بر کنترلکننده پیشبین با مجموعه کنترلی پیوسته ارائه شده است. چنانچه، در حالت پایدار، یک بردار ولتاژ فعال به همراه یک بردار ولتاژ صفر در هر سیکل کنترلی به موتور اعمال میشود. مقادیر فاز، دامنه و ضریب وظیفه بردار ولتاژ فعال به گونهای بهینه میگردد که خطای جریان استاتور حداقل شود. در حالت گذرا، برای بهبود پاسخ دینامیکی گشتاور، یک بردار ولتاژ با حداکثر دامنه در کل سیکل کنترلی به موتور اعمال میشود و زاویه بردار ولتاژ به گونهای محاسبه میشود که خطای جریان استاتور در انتهای سیکل کنترلی به صفر کاهش پیدا کند. مدولاسیون بردار فضایی به منظور تولید بردار ولتاژ انتخاب شده استفاده شده است. عملکرد روش در نرم افزار متلب مورد ارزیابی قرار گرفته است؛ نتایج بدست آمده نشان میدهد، روش پیشنهادی اعوجاج هارمونیک کل جریان استاتور را در حالت پایدار، کاهش و پاسخ دینامیکی موتور را در حالت گذرا بهبود میبخشد. علاوه بر این، عملکرد دو روش ارائه شده با تعدادی از روشهای کنترلی اخیر نیز مقایسه شده است که نتایج نشان میدهد با بکارگیری روشهای پیشنهادی، عملکرد حالت دائمی و گذرای بهتری حاصل می گردد.
In this paper, direct current control method is proposed to improve the performance of permanent magnet synchronous motor in steady and transient states. In this method, direct flow control based on predictive controller with continuous control set is provided. Thus, In steady state, an active voltage vector along with a zero-voltage vector is applied to the motor in each control cycle. The values of the phase, amplitude and duty factor of the active voltage vector are optimized in such a way that the stator current error is minimized. In the transient mode, to improve the dynamic response of the torque, a voltage vector with maximum amplitude is applied to the motor in the entire control cycle, and the angle of the voltage vector is calculated in such a way that the stator current error is reduced to zero at the end of the control cycle. Spatial vector modulation is used to generate the selected voltage vector. The performance of the method has been evaluated in MATLAB software; The obtained results show that the proposed method of harmonic distortion of the total stator current in the steady state reduces and improves the dynamic response of the motor in the transient state. In addition, the performance of the two presented methods has been compared with a number of recent control methods, and the results show that by using the proposed methods, the performance of the steady and transient state is improved.
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