Low input current ripple Battery Charging Regulator based on coupled-inductor

Abstract

As shortcomings of traditional nonisolation step down Battery Charging Regulator (BCR), a fourthorder converter known as Superbuck is studied in this paper, and the optimality of Superbuck is the continuity of both the input current and the output current. So the impact on input power is reduced using Superbuck topology, and the influence of a voltage spike of a semiconductor due to circuit parasitic inductance is avoided. Based on Superbuck topology and coupledinductor technology, low input current ripple BCR in which peakcurrentmode (PCM) control is applied is designed in this paper. According to the theoretical study, a prototype of BCR input current ripple, which is about 50% less than that of the discreteinductor Superbuck is made, and the design requirements are all met. Key wordsSuperbuck; coupledinductor; PeakCurrent Mode Control; battery charging; optimality VIII. BIOGRAPHIESBao Zhiyun was born in Jinzhou of China, 1976. She received bachelor degree of power system and automation from Harbin Institute of Technology, China, in 1998. She received master degree of power electronics and motion control from Harbin Institute of Technology, China, in 2002. And now she studies for a doctorate of power electronics and motion control in Harbin Institute of Technology. She works in ShenZhen Polytechnic, associate professor. Her special fields of interest included power system, power electronics and motion control.