نوع مقاله: کوتاه

نویسندگان

مربی دانشگاه علوم دریایی امام خمینی(ره) نوشهر

چکیده

کنترل مستقیم گشتاور (DTC) یکی از روش‌های کارآمد در کنترل موتور القایی است. در روش کنترل مستقیم گشتاور، شار و گشتاور موتور به‌عنوان کمیت‌های مرجع، محسوب و با انتخاب بهینه بردارهای کلیدزنی اینورتر کنترل می‌‌شوند. با استفاده از روش کنترل مستقیم گشتاور می‌توان محدودیت‌ها و پیچیدگی‌های کنترل برداری میدان جهت داده‌شده (FOC) را کاهش داد. کنترل مستقیم گشتاور دارای پاسخ گشتاور بسیار سریعی است و در مقابل تغییرات ناگهانی بار مقاوم عمل می‌کند. در این مقاله مقایسه‌ای بین دو روش کنترل مستقیم گشتاور کلاسیک (DTC-CLASSIC) و کنترل مستقیم گشتاور مبتنی بر مدولاسیون پهنای پالس بردار فضایی (DTC-SVPWM) با بهره‌گیری از اینورترهای کلمپ دیودی (NPC) دوسطحی و سه سطحی صورت گرفته است. مقایسه این روش‌ها با استفاده از نتایج حاصل از شبیه‌سازی در محیط سیمولینک نرم‌افزار MATLAB انجام شد. نتایج حاصل از شبیه‌سازی نشان می‌دهد که با درنظرگرفتن قید محدودیت ماکزیمم فرکانس کلیدزنی برابر، روش DTC-SVPWM با بهره‌گیری از اینورتر سه‌سطحی ضربان شار، ضربان گشتاور و THD جریان استاتور کمتری نسبت به سه حالت دیگر دارد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Comparison of DTC-CLASSIC and DTC-SVPWM methods for controlling induction motors applying two-level and three-level inverters

نویسندگان [English]

  • h mohammadi
  • M Alizadeh
  • A Gudarzi

Navy

چکیده [English]

Direct torque control (DTC) is one of the most effective methods for controlling the induction motor. In direct torque control, motor flux and torque are considered as reference quantities, and are controlled by optimal selection of inverter switching vectors. Using the direct torque control method, you can reduce the field oriented control (FOC) constraints and complexities. The direct torque control has a very fast torque response and is resistant to sudden load variations. In this paper, a complete comparison was made between two methods of classic direct torque control (DTC-CLASSIC) and direct torque control based on space vector pulse width modulation (DTC-SVPWM) using two-level and three-level diode clamp inverters (NPC). Comparison of these methods was carried out using simulation results in MATLAB software. The results of the simulation show that, with respect to the limitation constraint of maximum switching frequency, the DTC-SVPWM applying three-level inverter has less flux and torque ripple and less THD of stator current than the other three.

کلیدواژه‌ها [English]

  • Induction Motor
  • Multilevel inverter
  • Direct Torque Control
  • Space vector pulse width modulation

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