CAJ | 학술논문

一般输出滤波电感的设计需以临界连续电流为依据并根据经验公式选取电流纹波计算.该方法未考虑滤波电感上电流脉动对变换器各应力参数的影响,难以得到较理想的输出滤波电感值,从而影响变换器的实际效果.为解决这一缺陷.深入分析了Buck变换器电流纹波率的选取理论依据,提出输出滤波电感的优化设计.该方法综合考虑了变换器各应力参数、滤波电感的体积及变换器的动态性能,最终确定了电流纹波率最佳值约为0.4.以此计算的滤波电感值未影响到变换器动态响应,其设计获得了优化.实验结果验证了理论分析的正确性和该方法的可行性.
일반수출려파전감적설계수이림계련속전류위의거병근거경험공식선취전류문파계산.해방법미고필려파전감상전류맥동대변환기각응력삼수적영향,난이득도교이상적수출려파전감치,종이영향변환기적실제효과.위해결저일결함.심입분석료Buck변환기전류문파솔적선취이론의거,제출수출려파전감적우화설계.해방법종합고필료변환기각응력삼수、려파전감적체적급변환기적동태성능,최종학정료전류문파솔최가치약위0.4.이차계산적려파전감치미영향도변환기동태향응,기설계획득료우화.실험결과험증료이론분석적정학성화해방법적가행성.
The general way to design the output filter inductor is taking the critical discontinue current as the basis,then selecting the inductor current ripple according to the experiential equations to calculate the inductor value.This method neglects the effects of the inductor current ripple on the overall stresses of the converter,it can't provides ideal output inductor values,so it will affect the actual performance of the converter.In order to solve the shortcom,the theoretical basis for selecting the current ripple ratio of Buck converter is analyzed and an optimal design method of the output inductor is proposed.The overall stresses of the converter,the size of the filter inductor and dynamic performance of the converter are all considered in the proposed method.The optimum value of current ripple ratio is set to about 0.4 finally.The inductance calcultated in terms of the determined current ripple ratio can not affect the dynamic performance of the converter, so the design of the converter is optimized.The correctness of theoretical analysis and the feasibility of the proposed method are verified by the experimental results.