交错并联临界导通模式Buck电感高密度集成与优化

doi:10.19595/j.cnki.1000-6753.tces.211923

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摘要该文研究宽输入电压范围临界导通模式（CRM）两相交错并联Buck平面电感高密度集成与优化设计方法。根据电感电流及其磁通分布特性,以减小电感总体积和损耗为目标,提出共用非绕线部分的新型集成电感磁心结构,分析集成磁心对电感耦合特性及电路工作特性的影响。以限定高度下电感的占地面积和损耗为优化目标,给出新型电感结构参数优化设计方法。最后研制一台高度仅为7mm,功率密度约800W/in³,最高效率为99%的实验样机,实验结果表明了所提方案的有效性。

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	倪硕
	吴红飞
	陈君雨
	华明
	邢岩

关键词 ：降压变换器, 平面耦合电感, 磁集成, 宽输入电压

Abstract：This paper studies the high-density integration and optimization design method of planar inductor for two-phase interleaved critical conduction mode (CRM) Buck converter with wide-input-voltage-range and critical conduction mode. With the goal of reducing the total volume and loss of the inductor, a new integrated inductor core structure sharing non-winding magnetic parts is proposed based on the inductor current and its magnetic flux distribution characteristics. The influence of integrated magnetic core on coupling effects and circuit operating characteristics is analyzed. Taking the footprint and loss of the inductor under limited height as the optimization objective, an optimized design method of the new structure for inductor is given. Finally, an experimental prototype with the height of only 7mm, the power density of about 800W/in³ and the maximum efficiency of 99% is developed. The experimental results show the effectiveness of the proposed scheme.

Key words： Buck converter planar coupled inductor magnetic integration wide-input-voltage

收稿日期: 2021-11-25

PACS:

TM46

基金资助:国家自然科学基金（52122708, 51977105）、江苏省自然科学基金（BK20200017）和江苏省青蓝工程资助项目

通讯作者: 吴红飞男,1985年生,教授,博士生导师,研究方向为电力电子与电力传动。E-mail: wuhongfei@nuaa.edu.cn

作者简介: 倪硕男,1997年生,硕士,研究方向为电力电子与电力传动。E-mail: nishuo@nuaa.edu.cn

引用本文:

倪硕, 吴红飞, 陈君雨, 华明, 邢岩. 交错并联临界导通模式Buck电感高密度集成与优化[J]. 电工技术学报, 2022, 37(18): 4688-4696. Ni Shuo, Wu Hongfei, Chen Junyu, Hua Ming, Xing Yan. Integration and Optimization of a High Power Density Inductor for an Interleaved Critical Conduction Mode Buck Converter. Transactions of China Electrotechnical Society, 2022, 37(18): 4688-4696.

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