ارائه یک مبدل غیر ایزوله بسیار افزاینده با کلیدزنی نرم و تعداد المان کمکی کم

روش‌های هوشمند در صنعت برق

مقاله 8، دوره 13، شماره 51، آذر 1401، صفحه 123-136   

نوع مقاله: مقاله پژوهشی

نویسندگان

شکوه شعبانی؛ مجید دلشاد^* ؛ رامتین صادقی

دانشکده فنی مهندسی- واحد خوراسگان، دانشگاه آزاد اسلامی، خوراسگان، اصفهان، ایران

چکیده

در این مقاله، یک مبدل غیر ایزوله بسیار افزاینده جدید با کلیدزنی نرم ارائه شده است. یک مدار کمکی با حداقل تعداد المان به مبدل پیشنهادی اضافه شده که شرایط کلیدزنی نرم را برای کلیه المان­های نیمه هادی فراهم می­نماید، لذا مشکل بازیابی معکوس دیودها را برطرف و تلفات کلیدزنی و هدایتی کلیدها را کاهش می­دهد. همچنین، در مبدل پیشنهادی تنها از یک هسته مغناطیسی استفاده شده­ که موجب کاهش مقاومت مسی سیم­پیچ­ها می­گردد، در نتیجه راندمان مبدل پیشنهادی در مقایسه با مبدل بوست متداول بهبود یافته است. همچنین برای پایداری ولتاژ خروجی مبدل در سطح دلخواه در لحظه­های تغییر بار، از کنترل­کننده انتگرالی تناسبی استفاده شده و نتایج شبیه­سازی آن با نرم­افزار متلب ارائه شده است. برای اثبات تحلیل­های تئوری کلیدزنی نرم، یک نمونه آزمایشگاهی 250 واتی پیاده­سازی گردیده و نتایج عملی آن ارائه شده است.

کلیدواژه‌ها

بسیار افزاینده؛ کلیدزنی نرم؛ گذر-ولتاژ-صفر؛ مدولاسیون پهنای پالس

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