Automatic Current Limit Strategy for LLC DC-DC Converter for Overload Operation

被引：2

作者：

Yang, Xiao ^{[1
]}

Sha, Deshang ^{[1
]}

机构：

[1] Beijing Inst Technol, Adv Power Convers Ctr, Sch Automat, Beijing 100081, Peoples R China

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2024年 / 39卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Switching frequency; Resonant frequency; Limiting; Trajectory; Voltage control; Inductors; Control systems; LLC resonant converter; phase shift (PS) method; resonant current limiting; state-plane analysis; OPTIMAL TRAJECTORY CONTROL; CURRENT SENSING METHOD; SOFT START-UP; RESONANT CONVERTER; PROTECTION; MODE;

D O I：

10.1109/TPEL.2024.3397621

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：

LLC dc-dc converter is widely used, but its current suppression under overload operation is a concerned issue. In the previous work, the working conditions in which the switching frequency is lower than the resonant frequency and phase shift (PS) control under overload operation are not mentioned. In this article, comprehensive and universal geometric analysis is given under these conditions. The relationship of resonant current, normalized output voltage, switching frequency and PS angle is analyzed comprehensively in facing various working conditions with state-plane analysis. These analyses can be referenced in researches on controlling the peak value of resonant current. Experimental results are demonstrated on a 300 W LLC converter to verify the effectiveness of the analysis.

引用

页码：9917 / 9928

页数：12

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