دانلود مقاله ISI بهبود راندمان بار کوچک و متوسط مبدل های باک با سلف های غیرخطی مسطح و کنترل on time متغیر

عنوان انگلیسی مقاله:
Improving Light and Intermediate Load Efciencies of Buck Converters With Planar Nonlinear Inductors and Variable On Time Control

ترجمه فارسی عنوان  مقاله:
بهبود راندمان بار کوچک و متوسط مبدل های باک با سلف های غیرخطی مسطح و کنترل on time متغیر

چکیده انگلیسی مقاله:
Abstract - It has been addressed that light and intermediate load ef?ciencies of high-frequency buck converters in portable electronic devices are very important for extending lifetime of batteries. This paper proposes to utilize wide range, gradually changeable nonlinear inductors with variable on time control to improve light and intermediate load ef?ciencies. Integrated multipermeability magnetic cores are advanced to realize the nonlinear inductors. And based on the nonlinear inductors, variable on-time control scheme is proposed to reduce the frequency-dependent loss. The theoretical loss reduction is demonstrated by comparing loss of a converter employing conventional constant on-time control scheme and employing the proposed control scheme. A two-permeability nonlinear inductor prototype is fabricated. Its inductance could vary from 0.13 μH at full load to 0.66 μH at no load. The nonlinear inductor is employed in a 12 V input, 1.6 V output buck converter to evaluate its performance. With the purpose of comparison, other two commercial chip inductors are also tested in the converter. The results show the nonlinear inductor with variable on time control could effectively improve ef?ciencies of light and intermediate load conditions as theoretical analysis does.

منتشر کننده مقاله: IEEE

سال انتشار مقاله: 2012

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قیمت: فقط 3,000 تومان
خرید و دانلود فوری
سایز: MB 1
فرمت: pdf
تعداد صفحات/اسلاید: 12