سال انتشار: ۱۳۹۱
محل انتشار: هفدهمین کنفرانس سراسری شبکه های توزیع نیروی برق
تعداد صفحات: ۱۱
Karim Soltanzadeh, – Department of Electrical Engineering, Faculty of Engineering Islamic Azad University of Najafabad, Najafabad, Iran
Alireza Tavakoli – Department of Electrical Engineering, Faculty of Engineering, Islamic Azad University of Najafabad, Najafabad, Iran
Parisa Bozorgzad Arbab – Department of Electrical Engineering, Faculty of Engineering Islamic Azad University of Najafabad, Najafabad, Iran
A high frequency power converter system suitableto replace a typical power distribution transformer is discussed.The new power converter systems contain a number of highpower DC-DC converters as main components. Magnetic circuitsare widely used in the switching converters. Increasing theswitching frequency in switching converters is considered anadvantage. Because with increasing frequency, can reduce size ofthe magnetic components. But with increasing frequency,conventional magnetic core and winding losses increase. In factthis is most important limitation in increasing the switchingfrequency in switching converters. Other limitations of increasedfrequency, is increasing magnetic parasites. Increased frequencyof transformer is the causing of increased leakage inductance andequivalent capacitance between the windings. These parasitescause unwanted voltages and leakage currents in thetransformer, which increases losses and reduce the efficiency willbe that result. This paper presents the DC-DC converter withresonant commutation. The described converter employs a lowprofile high frequency transformer, a LCL resonant tank andtwo full bridge converters. In this paper, after evaluation thefeatures of the nanostructure magnetic core, Design issues of highpower density transformers for DC/DC converter systems arediscussed. Under the specified operating condition, thetransformer is designed to achieve the minimum volume. Finemet nanocrystalline magnetic material is suitable for the highfrequency applications, due to its superior low loss density andhigh operating temperature characteristics.Based on an productarea approach, transformer design and equivalent circuit isdeveloped, with leakage inductances calculated. The analysis hasbeen verified by the simulations results.