تحلیل و پیاده‌سازی یک مبدل DC-DC کاهنده با روش کنترلی جدید به‌منظور کاهش تلفات مبدل
محورهای موضوعی : مهندسی برق و کامپیوتر
محمدرضا بنائي
1
,
سجاد قابلی ثانی
2
1 - دانشكده فنی و مهندسی، دانشگاه شهید مدنی آذربایجان
2 - دانشكده فنی و مهندسی، دانشگاه شهید مدنی آذربایجان
کلید واژه: مبدل کاهنده, مبدل دو کلیده, روش کنترلی, کاهش تلفات,
چکیده مقاله :
در این مقاله، یک مبدل کاهنده مبتنی بر مبدل‌های باک و باک-بوست با استفاده از روش کاهش تلفات پیشنهاد شده است. در پیاده سازی مبدل پیشنهادی، از خازن‌های غیر الکترولیتی استفاده شده که منجر به افزایش طول عمر و کاهش وزن و حجم مدار شده است. در این مقاله، مبدل پیشنهادی با سایر مبدل‌های کاهنده مورد مقایسه قرار گرفته است. به منظور افزایش بازدهی مبدل نسبت به ساختارهای دیگر، از روشی مبتنی بر تعیین چرخه‌های کاری به منظور کاهش تلفات مبدل استفاده شده است که منجر به افزایش بازدهی خروجی مبدل شده است. همچنین به منظور نمایش تغییرات بازدهی با استفاده از روش پیشنهادی نسبت به روش متداول، بازدهی مبدل توسط محاسبات تئوری تحت شرایط واقعی محاسبه شده و خروجی نتایج تلفات مقایسه شده است. علاوه بر این، مبدل پیشنهادی از مزیت زمین مشترک با منبع ورودی برخوردار بوده و دارای بهره کاهندگی مناسب می‌باشد. درنهایت، این مبدل به صورت برد چاپی پیاده سازی شده و تحت توان خروجی 100 وات مورد بررسی قرار گرفته است.
A step-down converter based on buck and buck-boost converters with a loss reduction technique is proposed in this paper. Utilizing non-electrolytic capacitors in the implementation of the proposed converter has resulted in an increase in circuit life and a reduction in weight and volume. This paper compares the proposed converter to other buck converters. To increase the output efficiency of the converter in comparison to other structures, a new method based on determining the working duty-cycles has been employed to reduce the losses of the converter, resulting in an increase in the converter's output efficiency. In order to demonstrate the differences in efficiency between the proposed method and the conventional method, the efficiency of the converter has been calculated using real-world conditions and the output loss results have been compared. In addition, the proposed converter has a common ground with the input source and has a suitable reduction gain. Finally, this converter has been implemented as a PCB and tested with 100 watts of output power.
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