مبدل DC-DC درهم‌تنيده بر پايه مبدل باک با نسبت تبديل بسيار پايين
محورهای موضوعی : مهندسی برق و کامپیوترمائده قنبري عديوي 1 , محمدروح‌اله يزداني 2 *
1 - دانشگاه آزاد اسلامي واحد اصفهان
2 - دانشگاه آزاد اسلامي واحد اصفهان
کلید واژه: مبدل سوئيچينگ باكتداخل الكترومغناطيسيمبدل بسيار كاهندهساختار درهم‌تنيده,
چکیده مقاله :
ضريب تبديل بسيار پايين در توپولوژي مبدل سوئيچينگ باك مرسوم قابل حصول نيست و همچنين استرس ولتاژ سوئيچ در اين مبدل به عنوان عيب ديگر مبدل باک ساده در ولتاژهاي وروردي زياد مطرح است. در اين مقاله، يك مبدل DC-DC سوئيچينگ درهم‌تنيده بر پايه ساختار باك براي حل اين مشکلات ارائه مي‌شود. در ساختار اين مبدل سوئيچينگ، از ترانسفورمر نيز استفاده شده و مشكل بازنشاني (ريست) هسته ترانسفورمر حل گردیده و نيازي به سيم‌پيچ بازنشاني نيست. پس از بيان شكل موج‌هاي كليدي و روابط تحليلي مبدل پيشنهادي، نمودارهاي نسبت تبديل ولتاژ ارائه شده و در ادامه نتايج شبيه‌سازي شكل موج‌هاي اصلي مبدل پيشنهادي با توان 240 وات، با ورودي 150 ولت و ولتاژ خروجي 24 ولت براي بررسي صحت نتايج تئوري ارائه مي‌گردد.
High step-down conversion ratio cannot be achieved by the conventional buck converter. Also, the switch voltage stress is another drawback of the regular buck converter for high input voltages. In this paper, a DC-DC switching converter using interleaved method is proposed based on the buck topology to achieve a high step-down conversion ratio. In the structure of this converter, a coupled inductor is used without need of another auxiliary winding. After presenting key waveforms and analysis of the proposed converter, the conversion ratio curves are offered. Moreover, simulation waveforms of a 240 W converter prototype with the input voltage of 150 V and the output voltage of 24 V are shown to verify the theoretical analysis.
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