Input and output total currents characterization in BCM and CCM Interleaved Power Converters Under Inductance Mismatch

Paula Cervellini , Marco Carnaghi , Pablo Antoszczuk , Rogelio García Retegui , Marcos Funes
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Abstract

This paper presents a complete characterization of input and output currents in interleaved power converters with inductance mismatch, operating in Boundary Conduction Mode (BCM) and Continuous Conduction Mode (CCM). The proposal allows to compute these currents in several interleaved converter topologies for the entire range of operating points, considering any number of phases and any inductance ratio. Input and output currents are recovered from the values obtained when adding the phase currents in the instants where the slopes change; values that are thus defined as key points. This methodology is based on the coincidences that exist between the instants of the phase current key points and those of total currents. By using the computed key points, ripple amplitude, rms value and harmonic content of input and output total currents for the entire range of operating points can be easily obtained. Simulations are conducted on a 5-phase boost converter and a 5-phase buck converter under different conditions in order to validate the proposal expressions. Experimental tests on a 5-phase buck converter are presented under different operation conditions to verify that the proposed method can be applied in real situation.

Abstract Image

电感失配下BCM和CCM交错功率变换器的输入和输出总电流特性
本文给出了在边界导通模式(BCM)和连续导通模式(CCM)下工作的电感失配的交错功率变换器的输入和输出电流的完整表征。该方案允许在几个交错转换器拓扑中计算这些电流,适用于整个工作点范围,考虑任意数量的相位和任何电感比。输入和输出电流由在斜率变化的瞬间添加相电流时获得的值恢复;因此被定义为关键点的值。这种方法是基于相电流关键点的瞬间与总电流的瞬间之间存在的一致性。利用计算出的关键点,可以很容易地得到整个工作点范围内输入输出总电流的纹波幅值、有效值和谐波含量。通过对五相升压变换器和五相降压变换器在不同条件下的仿真,验证了所提表达式的正确性。通过对一个5相降压变换器在不同工作条件下的实验测试,验证了该方法在实际应用中的可行性。
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来源期刊
Power electronic devices and components
Power electronic devices and components Hardware and Architecture, Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Safety, Risk, Reliability and Quality
CiteScore
2.00
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80 days
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