An Enhanced Control Algorithm for Improving the Light-Load Efficiency of Noninverting Synchronous Buck-Boost Converters

被引：34

作者：

Kim, Dong-Hee ^{[1
]}

Lee, Byoung-Kuk ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Coll Informat & Commun Engn, Suwon 440746, Gyeonggi Do, South Korea

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2016年 / 31卷 / 05期

关键词：

Algorithm; dc-dc power conversion; efficiency tracking; noninverting synchronous buck-boost converter; photovoltaic power system; VOLTAGE; FEEDFORWARD; INDUCTOR;

D O I：

10.1109/TPEL.2015.2500622

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A loss reduction algorithm at light loads is needed to increase the overall efficiency of noninverting synchronous buck-boost dc-dc converters. Inductor current ripple generates most of the total loss at light loads. Thus, a ripple current reduction algorithm is an effective method of increasing light-load efficiency. This letter proposes a control algorithm for increasing the light-load efficiency by controlling the inductor current ripple. To achieve the optimal control of the inductor current, a maximum efficiency tracking scheme is implemented. Experimental results verify that the proposed algorithm significantly improves the light-load efficiency; at a 10% load condition, the efficiency is approximately 3.19% higher than that of the conventional algorithm.

引用

页码：3395 / 3399

页数：5

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