Fast Unloading Transient Response Buck Converter Using Coupled Inductor Based on Sequence Switching Control

被引：0
|
作者：
Zhao Z. [1 ]
Lu W. [1 ]
Hu Z. [1 ]
Ma J. [1 ]
Zhou L. [1 ]
机构：
[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing
来源：
Lu, Weiguo (luweiguo@cqu.edu.cn) | 1600年 / China Machine Press卷 / 35期
关键词：
Buck converter; Coupled inductor; Sequence switching control; Unloading transient response;
D O I：
10.19595/j.cnki.1000-6753.tces.L80332
中图分类号：
学科分类号：
摘要：
In this paper, a fast unloading transient response Buck converter using coupled-inductor auxiliary circuits based sequence switching control scheme is proposed, so as to improve the unloading transient response of the time-optimal control (TOC) scheme. The proposed auxiliary coupled inductor circuit is controlled to connect in parallel with the input voltage source, so as to increase the inductor-current slew rate during an unloading transient. Furthermore, an ‘n+1’ sequence switching strategy is proposed to control the auxiliary coupled inductor. With the proposed control strategy the load transient event is divided into n+1 sub-periods, and in each sub-period, the capacitor-charge balance principle is used to determine the switching time sequence. In addition, the system voltage overshoot is determined by the maximum voltage overshoot in each of n+1 periods, and the settling time is shortened to the moment that the inductor current reached the output current firstly. Moreover, a 12V/3.3V synchronous Buck converter has been built to verify the feasibility of the proposed scheme. © 2019, Electrical Technology Press Co. Ltd. All right reserved.
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页码：28 / 36
页数：8
相关论文
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