پیاده سازی یک مبدل بسیار افزاینده با کنترل مد لغزشی انتگرالی با راندمان بالا برای کاربردهای فوتوولتاییک
محورهای موضوعی : مهندسی برق قدرت
علی محمد قدوری
1
,
مجید معظمی
2
1 - بخش مهندسی، شرکت پالایشگاه شمال، وزارت نفت عراق، بغداد، عراق
2 - دانشکده مهندسي برق، واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد، ايران
کلید واژه: مبدل بسیار افزاینده, کلیدزنی نرم, کنترل مد لغزشی, ریپل جریان پایین.,
چکیده مقاله :
مبدلهای بسیار افزاینده غیر ایزوله دارای کاربردهای وسیعی نظیر فوتوولتاییک، پیل سوختی، خودروهای هیبریدی و غیره هستند. در بسیاری از کاربردها تثبیت ولتاژ خروجی علی رغم تغییرات بار و یا ولتاژ ورودی بسیار اهمیت دارد، لذا بایستی یک مدار کنترل مناسب برای مبدل طراحی نمود تا پاسخ دینامیکی آن به تغییرات بار سریع باشد. برای کاهش تلفات و افزایش راندمان نیز تکنیکهای کلیدزنی نرم ارایه شده اند. در این مقاله یک مبدل بسیار افزاینده جدید با مدار کنترل مد لغزشی ابتکاری ارایه گردیده است. مبدل دارای بهره ولتاژ بالا، استرس پایین و کلیدزنی در جریان صفر است. همچنین انرژی سلف نشتی به خوبی جذب خازن کلمپ می شود و اسپایک ولتاژ دو سر سوییچ مشاهده نمی گردد. کلیه دیودها در جریان صفر کلیدزنی می گردند، لذا مشکل بازیابی معکوس ندارند. مبدل بطور کامل تحلیل گردیده و یک نمونه 130 وات از آن شبیه سازی و ساخته شده است تا تحلیلهای مدار را تایید نماید.
Non-isolated step-up converters have wide applications such as photovoltaics, fuel cells, hybrid vehicle, etc. In many applications, it is very important to stabilize the output voltage despite changes in load or input voltage, so a suitable control circuit for the converter should be designed so that its dynamic response to load changes is fast. To reduce losses and increase efficiency, soft switching techniques are also provided. In this paper, a new high boost converter with an innovative sliding mode control circuit is presented. The converter has high voltage gain, low stress and zero current switching. Also, the energy of the leakage inductor is well absorbed by the clamp capacitor and the voltage spike at both ends of the switch is not observed. All diodes are switched at zero current, so they don't have reverse recovery problem. The converter has been fully analyzed and a 130 W sample has been simulated and built to confirm the circuit analysis.
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