یک مبدل دو ورودی بسیار افزاینده جدید با کلید زنی نرم تحت جریان صفر در زمان روشن شدن سوئیچ‌ها

محورهای موضوعی : مهندسی برق الکترونیک

محمود وصالی ¹ , حسین رنجبر ² , امین معتمدی نسب ³

1 - دانشکده مهندسی برق، واحد اصفهان (خوراسگان)، دانشگاه آزاد اسلامی، خوراسگان، اصفهان، ایران
2 - گروه مهندسی برق، دانشگاه فنی و حرفه ای، تهران، ایران
3 - گروه فیزیک، دانشگاه فنی و حرفه ای، تهران ، ایران

تاریخ دریافت : 1400/12/23 تاریخ پذیرش : 1401/04/26 تاریخ انتشار : 1401/06/01

کلید واژه: بسیار افزاینده, دو ورودی, کلیدزنی نرم, راندمان, مبدل‌های DC-DC,

چکیده مقاله :

یک مبدل بسیار افزاینده DC-DC دو ورودی در این مقاله ارائه می‌گردد. شرایط کلید‌زنی نرم در مبدل پیشنهادی برای زمان روشن شدن سوئیچ وجود دارد از این رو راندمان مبدل بالا می‌باشد. با توجه به اینکه برای افزایش بهره ولتاژ از تنها خازن استفاده شده است و سلفهای کوپل شده‌‌ای در مبدل وجود ندارد، جریان ورودی مبدل پیوسته می‌باشد. تکنیک مورد استفاده جهت افزایش بهره می‌تواند با طبقات بیشتری استفاده گردد تا بهره بسیار بالاتری بدست آید. همچنین مبدل را می‌توان به جای دو ورودی به صورت تک ورودی در هم تنیده استفاده نمود که در این صورت ریپل جریان ورودی کاهش می‌یابد. استرس ولتاژ روی سوئیچ‌های مبدل نسبت به ولتاژ خروجی پایین می‌باشد از این رو سوئیچ‌های با ولتاژ پایینتری می‌توان استفاده نمود که منجر به کاهش هزینه مبدل می‌گردد. مبدل پیشنهادی به طور کامل تحلیل می‌شود و به منظور اثبات نتایج تئوری شبیه سازی در توان 500 وات بر روی مبدل انجام می‌پذیرد. نتایج شبیه سازی در بار کامل راندمان حدود 5/95 را نشان می‌دهد.

چکیده انگلیسی:

A high step-up two-inputs DC-DC converter is presented in this paper. The soft switching condition is provided for switch in turn on instant, so the converter efficiency is high. Due to the fact that only the capacitor is used to increase the voltage gain and there are no coupled inductors in the converter, the input current of the converter is continuous. The technique used to increase gain can be used with more stages to achieve higher voltage gain. The converter can also be used as a single input intertwined instead of two inputs, which in this case the input current ripple is reduced. The voltage stress on the switches is lower than the output voltage, so lower voltage switches can be used, which reduces the converter cost. The proposed converter is completely analyzed and in order to prove the theoretical results, a simulation is performed on the converter at 500 watts. The results of the simulation at full load show an efficiency of about 95.5%.

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