5346

309 دكتري

دكتري

الكترونيك

اصفهان: دانشگاه صنعتي اصفهان،دانشكده برق و كامپيوتر

1389

ده،150ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

حسين فرزانه فرد

جعفر قيصري

4/5/89

شاهرخ فرهنگي،محمدرضا ذوالقدري

مهندسي برق و كامپيوتر

ID309 دكتري

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Isolated Soft Switching Current fed DC DC Converter for High Step up Applications Majid Delshad delshad@ec iut ac ir April 2010 Department of Computer Electrical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Dr Hosein Farzanehfard Hosein@cc iut ac ir Dr Jafar Gheisari gheisari@cc iut ac ir Department of Computer Electrical Engineering Isfahan University of technology Isfahan Iran Abstract In this thesis hard switching and soft switching current fed converters are investigated and two new ZVS current fed converters are introduced First a new push pull current fed converter is introduced Auxiliary circuit in this converter not only provides soft switching conditions for all semiconductor devices but also absorb the voltage spikes across the switches due to the transformer leakage inductance Then a new ZVS high step up converter is presented Also in this thesis an active clamp circuit is applied to single switch flyback current fed converter and a new soft switching buck boost converter is introduced Finally from this buck boost converter a new ZVS buck boost converter with low number of components is driven and introduced In this thesis the proposed converters are completely analyzed and design considerations are discussed Also experimental results are presented to verify the presented theoretical analysis Furthermore in each chapter the proposed converters are compared with other similar conventional soft switching converters by simulation results Keywords Current fed converter soft switching ZVS active clamp step up Buck Boost

حسين فرزانه فرد

جعفر قيصري

شاهرخ فرهنگي،محمدرضا ذوالقدري