ارائه یک مبدل تک سوئیچ DC-DC بسیار افزاینده با کلیدزنی نرم برای کاربردهای فتوولتائیک
محورهای موضوعی : مهندسی برق الکترونیک
طیبه شمسی
1
(دانشکده فنی مهندسي، واحد اصفهان (خوراسگان)، دانشگاه آزاد اسلامی، اصفهان، ايران)
مجید دلشاد
2
(دانشکده فنی مهندسي، واحد اصفهان (خوراسگان)، دانشگاه آزاد اسلامی، اصفهان، ايران)
احسان ادیب
3
(دانشکده مهندسی برق و کامپیوتر، دانشگاه صنعتی اصفهان، اصفهان، ایران)
محمد روح اله یزدانی
4
(دانشکده مهندسی برق و کامپیوتر، دانشگاه صنعتی اصفهان، اصفهان، ایران)
کلید واژه: مبدل‌های DC-DC, بسیار افزاینده, تک سوئیچه, کلیدزنی نرم, راندمان,
چکیده مقاله :
یک مبدل بسیار افزاینده DC-DC تک سوئیچه در این مقاله ارائه می‌گردد. شرایط کلیدزنی نرم در مبدل پیشنهادی برای زمان روشن شدن و خاموش شدن سوئیچ وجود دارد که باعث افزایش راندمان می‌شود. به منظور افزایش بهره از دو سلف کوپل شده استفاده شده است که از سلف نشتی سلف کوپل شده به منظور ایجاد شرایط کلیدزنی نرم استفاده شده است، به طوریکه که حداقل المان کمکی در مبدل پیشنهادی به کار گرفته شده است. در مبدل پیشنهادی تنها یک سوئیچ استفاده شده است که شرایط مبدل از نظر مدار کنترل هیچ تفاوتی با یک مبدل پایه ندارد. از این رو مبدل نیاز به طراحی مدار کنترل جدید ندارد. مدار کمکی اضافه شده به مبدل با حداقل المان، شرایط کلید زنی نرم را برای سوئیچ در زمان روشن شدن، تحت جریان صفر و در زمان خاموش شدن، تحت ولتاژ صفر ایجاد می‌کند، که علاوه بر افزایش راندمان، سادگی عملکرد و عدم افزایش هزینه را در پی دارد. بنابراین نوآوری مقاله ارایه یک مبدل بسیار افزاینده سوییچینگ نرم بدون تحمیل سوییچ اضافه و با تعداد المان پایین است. مبدل پیشنهادی پس از تحلیل تئوری کامل در توان 400 وات شبیه سازی می‌شود، که نتایج حاصل علاوه بر اثبات تحلیل تئوری راندمان 2/97 را نشان می‌دهد. همچنین نمونه آزمایشگاهی ساخته شده از مبدل و نتایج عملی بدست آمده، تحلیلهای تئوری و نتایج شبیه سازی را اثبات می‌نماید.
A single-switch DC-DC high step-up converter is presented in this paper. There are soft switching conditions in the proposed converter for switching on and off time, which increases efficiency. In order to increase the gain, two coupled inductors have been used, and the leakage inductance of the coupled inductors has been used to create a soft switching condition, and the minimal auxiliary element has been used in the proposed converter. In the proposed converter, only one switch is used, and the condition of the converter is no different from a basic converter in terms of the control circuit. Therefore, the converter does not need to design a new control circuit. The auxiliary circuit added to the converter with a minimal element, provides soft switching conditions for the switch at turn-on, under zero current and at turn-off, under zero voltage, which, in addition to increased efficiency, the circuit has a simple structure. Therefore, the innovation of the paper is to present a switching converter high step-up soft without imposing an additional switch and with a low number of elements. The proposed converter is simulated after full theoretical analysis at 400 W output power, which shows the efficiency of 97.2 percent, in addition to proving the theoretical analysis. Also, the prototype of the converter is made and the experimental results obtained prove the theoretical and simulation results.
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