کنترل مستقیم گشتاور موتور سنکرون آهنربای دائم به روش مود لغزشی تاخیردار و خطی‌ساز فیدبک

نویسندگان

دانشکده مهندسی برق و رباتیک – دانشگاه صنعتی شاهرود - شاهرود

چکیده

در این مقاله، کارایی درایو موتور سنکرون آهنربای دائم با کنترل مستقیم گشتاور ازطریق یک ساختار تنظیمی جدید وابسته به تأخیر بهبود یافته است. ساختار پیشنهادی مبتنی‌بر کنترل‌کننده مود لغزشی تأخیری با رسش نمایی در حلقه بیرونی سرعت است که با یک کنترل‌کننده خطی‌ساز فیدبک در حلقه داخلی شار و گشتاور ترکیب گشته است. کنترل مود لغزشی تأخیری به کمک رسش نمایی، همگرایی سریع حالت‌ها به سطح لغزش را تضمین می‌نماید و به سبب تقریب پیوسته‌ای که از تابع کلیدزن در قانون لغزش ارائه می‌دهد، از لرزش‌های ناخواسته جلوگیری کرده و خطای مانا را تقلیل می‌دهد. قانون فیدبک خطی‌ساز نیز به جبران‌سازی اثر غیرخطی دینامیک موتور پرداخته و امکان بهره‌گیری از کنترل‌کننده‌های خطی را برای حلقه شار و گشتاور ممکن می‌سازد. ساختار ترکیبی پیشنهادی از مدولاسیون بردار فضایی بهره برده، برمبنای تئوری لیاپانوف بنیان‌گذاری شده و ضرایب آن به‌صورت بهینه طراحی شده‌است که تمامی این ویژگی‌ها در کنار هم منجربه تولید گشتاور بالا در سرعت‌های پایین، کاهش ریپل شار و گشتاور و تقلیل اعوجاج جریانی در درایو موتور می‌شود. این روش ازطریق شبیه‌سازی بر روی موتور زیمنس (1FT7082-AF7) مورد آزمون قرارگرفته و با سایر روش‌های مشابه مبتنی‌بر کنترل مستقیم گشتاور مورد مقایسه قرار گرفته است.

کلیدواژه‌ها

عنوان مقاله [English]

Direct Torque-Control of PMSM Drive by Delayed Sliding Mode and Feedback Linearization Control Approach

نویسندگان [English]

  • V. Asadzadeh
  • A. Dastfan
  • A. Darabi
Electrical Engineering and Robotics Department, Shahrood University of Technology, Shahrood, Iran
چکیده [English]

In this paper, performance improvement of a direct torque-controlled permanent-magnet synchronous motor drive is achieved through a novel delay dependent controller. The method is based on a delayed sliding controller with exponential reaching law in the outer speed loop combined with a nonlinear feedback linearization based controller in the inner flux and torque loop. Delayed sliding mode controller guarantees fast reaching to the sliding surface and avoids unwanted chattering due to its continuous approximation of the switching term in the sliding law. Simultaneously, the feedback linearization deals with motor nonlinearities and facilitates linear controller design for torque and flux regulation. The proposed scheme is based on the Lyapunov approach and utilizes space vector pulse width modulation with optimized design parameters. It provides fast torque and flux control with diminished fluctuations, high torque at low speed, fast speed response and reduced stator current distortions. Theoretical analysis and simulation results on a Siemens servo motor (1FT7082-AF7) prove the merits of the method in considering flux, torque and speed control performance compared with the conventional direct torque control based methods.

کلیدواژه‌ها [English]

  • Permanent magnet synchronous motor
  • direct torque control
  • delayed sliding mode controller
  • feedback linearization

مراجع

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