یک مبدل جدید درجه دو DC/DC با بهره ولتاژ بسیار بالا و استرس جریان کم
محورهای موضوعی : مهندسی برق قدرت
سید جمال الدین حسینی
1
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سارا حسن پور
2
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غضنفر شاهقلیان
3
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مجید معظمی
4
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امیر بکتاش
5
1 - دانشکده مهندسی برق، واحد نجف‌آباد، دانشگاه آزاد اسلامی، نجف‌آباد، ایران
2 - دانشکده مهندسي برق، واحد رامسر، دانشگاه آزاد اسلامی، رامسر، ایران
3 - دانشکده مهندسی برق، واحد نجف‌آباد، دانشگاه آزاد اسلامی، نجف‌آباد، ایران
4 - دانشکده مهندسی برق، واحد نجف‌آباد، دانشگاه آزاد اسلامی، نجف‌آباد، ایران
5 - دانشکده مهندسی برق، واحد نجف‌آباد، دانشگاه آزاد اسلامی، نجف‌آباد، ایران
کلید واژه: مبدل جریان مستقیم بهره‌بالا, مبدل درجه دوم, تقسیم جریان, سلف تزویج‌شده, جریان ورودی پیوسته,
چکیده مقاله :
این مقاله یک مبدل درجه دوم دوسوئیچه جریان مستقیم جدید با نرخ بهره ولتاژ بسیار بالا، تنش جریان کم و ریپل جریان ورودی کم برای کاربردهای انرژی‌های تجدیدپذیر معرفی می‌کند. این توپولوژی پیشنهادی از یک سلف تزویج‌شده و سلول‌های ضرب‌کننده ولتاژ برای دستیابی به نسبت تبدیل ولتاژ فوق‌العاده بالا استفاده می‌کند. مزایای اصلی ساختار پیشنهادی شامل نسبت تبدیل ولتاژ فوق‌العاده بالا آن، تنش‌های ولتاژ و جریان کم، زمین مشترک بین طرفهای ورودی و خروجی و همچنین جریان ورودی پیوسته با ریپل کم است. همچنین، در مبدل پیشنهادی، تقسیم جریان بین اجزای مغناطیسی شامل سلف تزویج‌شده و سلف ورودی منجر به کاهش سطح جریان عبوری آنها می‌شود که تلفات توان کلی اجزای مغناطیسی و سوئیچ‌های قدرت را کاهش می‌دهد. علاوه بر این، تنش‌های ولتاژ روی سوئیچ‌های اکتیو مبدل پیشنهادی با استفاده از مدارهای کلمپ پسیو قابل بازیافت محدود می‌شود. اصول عملکرد، تجزیه و تحلیل حالت پایدار، مطالعه مقایسه‌ای، برآورد راندمان و همچنین ملاحظات طراحی مدار معرفی‌شده به تفصیل ارائه شده است. در نهایت، برای صحت‌سنجی عملکرد مبدل ارائه شده، یک نمونه اولیه (200 وات، 25 ولت - 400 ولت) پیاده‌سازی شده است. با توجه به نتایج تجربی، توپولوژی پیشنهادی می‌تواند ولتاژ خروجی جریان مستقیم 400 ولت را با بازده حدود 96.2 درصد ارائه دهد. علاوه بر این، تنش ولتاژ روی سوئیچ قدرت مبدل به حدود 15 درصد ولتاژ جریان مستقیم خروجی محدود می‌شود.
This paper introduces a new double-switch quadratic DC-DC converter with ultra-high voltage gain ratio, low current stress, and low input current ripple for renewable energy applications. This suggested topology uses a coupled-inductor and voltage multiplier cells to achieve the ultra-high voltage conversion ratio. The main benefits of the suggested structure are its ultra-high voltage conversion ratio, low voltage and current stresses, common ground between the input and output sides, and continuous input current with low ripple. Also, in the proposed converter, the current sharing between the magnetic components including the coupled-inductor and input inductor leads to a reduction of their passing current values, which alleviates the overall power losses of the magnetic components and power switches. Furthermore, the voltage stresses on the active switches of the proposed converter are restricted using the regenerative passive clamp circuits. The operating principle, the steady-state analysis, the comparison study, the efficiency estimation as well as design considerations of the introduced circuit are provided in detail. Finally, to justify the performance of the presented converter, a sample prototype (200 W, 25 V- 400 V) is implemented. Regarding the experimental results, the proposed topology can provide a high DC output voltage of 400V under the efficiency of about 96.2%. Moreover, the voltage stress across the power switch of the converter is limited to about 15% of the output DC voltage.
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