شماره کتابشناسی ملی
شماره
پ۲۴۶۸۱
زبان اثر
زبان متن نوشتاري يا گفتاري و مانند آن
per
عنوان و نام پديدآور
عنوان اصلي
تحلیل و شبیهسازی ساختار بهبود یافته مبدل DC-DC غیرایزوله با قابلیت کلیدزنی نرم
نام نخستين پديدآور
فاطمه فلاحی
وضعیت نشر و پخش و غیره
نام ناشر، پخش کننده و غيره
مهندسی برق وکامپیوتر
تاریخ نشرو بخش و غیره
۱۳۹۹
مشخصات ظاهری
نام خاص و کميت اثر
۱۲۴ص.
مواد همراه اثر
سی دی
یادداشتهای مربوط به پایان نامه ها
جزئيات پايان نامه و نوع درجه آن
کارشناسی ارشد
نظم درجات
مهندسی برق-قدرت گرایش الکترونیک قدرت
زمان اعطا مدرک
۱۳۹۹/۱۱/۳۰
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
The main purpose of this thesis is to provide improved DC-DC structures under soft switching. Nowadays, due to the growing importance of using DC-DC electronic power converters, the use of non-insulated DC-DC converters has become more than ever widespread due to its simple structures, small volume and cost-effective. Also, in order to reduce switching losses, various methods can be used, including soft switching. As a result, by reducing the maximum switching losses, higher efficiency, more power, acceptable voltage gain and better performance can be achieved under high frequency switching. In addition, in non-insulated DC-DC structures, high power density, wider power range and also the maximum mentioned advantages can be achieved by using methods such as interleaved, by connecting the input voltage sources in parallel. In this thesis, first, a non-insulated DC-DC structure under soft switching is proposed. Soft switching conditions are provided for all semiconductor devices of the proposed structure, when turning on and off. On the other hand, we have achieved these conditions only by using an auxiliary circuit with a minimum of elements. The proposed converter has achieved maximum benefits due to being interleaved, including low voltage and current stress, low current ripple, high power density, suitable voltage gain and acceptable efficiency. The second proposed converter is a non-insulated DC-DC converter with soft switching capability. Due to bidirectional structure, the proposed structure can be used in a wider range of applications, including as an interface circuit in a DC network. Also, all the switches of the proposed structure operate under soft switching conditions. As a result, total losses are reduced to an acceptable level and the efficiency of the proposed converter is increased. In both proposed structures, a simple PI-based controller is used to control the output voltage and create stability under different fluctuations of input voltage and output load. In order to accurately design the closed-loop control of the proposed structures, dynamic modeling of the proposed structures using mathematical equations has been investigated. As a result, the open-loop function is calculated and the converters controllability is investigated. And then, by designing the PI controller coefficients, the desired stability conditions can be achieved. Finally, after analyzing the theoretical relationships of the first and second proposed structures, the simulation results in PSCAD / EMTDC software are presented to prove the theoretical analyzes and the accuracy of their results
عنوانهای گونه گون دیگر
عنوان گونه گون
Analysis and simulation of Non-Isolated Soft-Switching DC-DC converters
نام شخص به منزله سر شناسه - (مسئولیت معنوی درجه اول )
عنصر شناسه اي
فلاحی
ساير عناصر نام
فاطمه
کد نقش
تهيه کننده
نام شخص - ( مسئولیت معنوی درجه دوم )
عنصر شناسه اي
بابایی
عنصر شناسه اي
صباحی
ساير عناصر نام
ابراهیم
ساير عناصر نام
مهران
تاريخ
استاد راهنما
تاريخ
استاد مشاور
شناسه افزوده (تنالگان)
عنصر شناسه اي
تبریز
