一种耦合电感增压直流变换器及其磁集成研究*

doi:10.11985/2022.02.017

电气工程学报 ›› 2022, Vol. 17 ›› Issue (2): 151-159.doi: 10.11985/2022.02.017

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一种耦合电感增压直流变换器及其磁集成研究^*

李洪珠(), 荆泽宇()

辽宁工程技术大学电气与控制工程学院葫芦岛 125105

收稿日期:2021-06-10 修回日期:2021-12-30 出版日期:2022-06-25 发布日期:2022-08-08
通讯作者: 荆泽宇 E-mail:601505670@qq.com;1798299362@qq.com
作者简介:李洪珠,男,1974年生,博士,教授。主要研究方向为电力电子及磁集成技术。E-mail： 601505670@qq.com
基金资助:
*辽宁省自然科学基金面上资助项目(2019-160)

A Research about DC-DC Converter with Coupled Inductor and Its Magnetic Integration Technology

LI Hongzhu(), JING Zeyu()

Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao 125105

Received:2021-06-10 Revised:2021-12-30 Online:2022-06-25 Published:2022-08-08
Contact: JING Zeyu E-mail:601505670@qq.com;1798299362@qq.com

摘要/Abstract

摘要：

为了解决光伏发电输出电压较低的问题,引入一种类型的耦合电感倍压单元,提出一种新型变换器拓扑结构。分析了变换器的工作原理,给出了电压增益、电压应力和临界等效电感时间常数的表达式。与传统Sepic变换器和其他Sepic变换器相比,所提出的变换器升高了近7倍电压增益,与此同时,开关管电压应力较低。并运用解耦磁集成的方法,在传统E-E型磁心的启发下,提出了一种新型4-U型磁心结构,其磁通密度分布更加均匀,且使得磁集成后的集成磁件体积更小,也有利于散热。试验样机测试表明,变换器效率达到93.9%,所测得试验波形符合理论分析。

关键词: Sepic变换器, 耦合电感, 高增益, 低应力, 解耦磁集成

Abstract:

A new type of converter topology is proposed in order to solve the problem of the low output voltage of photovoltaic power generation by introducing a type of coupled inductor voltage doubler unit. The working principle of the converter is analyzed, and the expressions of voltage gain, voltage stress and critical equivalent inductance time constant are given. By comparing the traditional Sepic converter and other Sepic converters, the proposed converter increases the voltage gain by nearly 7 times. At the same time, the voltage stress of the switch tube is lower. And using the method of decoupling magnetic integration, inspired by the traditional EE-type magnetic core, a new type of 4-U-type magnetic core structure is proposed. The magnetic flux density distribution of the magnetic core is more uniform and it makes the integrated magnetic parts after magnetic integration smaller. The smaller volume is also conducive to heat dissipation. The experimental prototype test shows that the efficiency of the converter reaches 93.9%, and the measured experimental waveform conforms to the theoretical analysis.

Key words: Sepic converter, coupled inductor, high gain, low stress, decoupling magnetic integration

中图分类号:

TM46

李洪珠, 荆泽宇. 一种耦合电感增压直流变换器及其磁集成研究^*[J]. 电气工程学报, 2022, 17(2): 151-159.

LI Hongzhu, JING Zeyu. A Research about DC-DC Converter with Coupled Inductor and Its Magnetic Integration Technology[J]. Journal of Electrical Engineering, 2022, 17(2): 151-159.

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参考文献 14

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变换器	电压增益	开关管电压应力
传统Sepic变换器	D/(1-D)	V₀/D
文献[10]	D/(1-D)²	V₀
文献[11]	(1+D)/( 1-D)	(DV₀)/(1+D)
所提变换器	[(1+D)n+D]/(1-D)	V₀/[(1+D)n+D]

参数	数值
耦合电感原边电流值/A	6
耦合电感副边电流值/A	3
耦合电感原边匝数	10
耦合电感副边匝数	20
磁心材料	PC40铁氧体
磁心磁导率	2 300
磁心气隙g₁	0.2
磁心气隙g₂	0.08

电路参数	参数值/型号
输入电压V_in/V	12
输出电压V_o/V	84
额定功率P_o/W	50
耦合电感匝比n	N_p/N_s=1∶2
励磁电感L_m/μH	50
漏感L_k/μH	1.5
输入电感L₁/μH	50
电容C₁、C₃、C₄	100 μF/100 V
电容C₂、C₅	100 μF/250 V
开关管S	IRF540N
二极管D₁、D₂、D₃、D₄	MBR20100CT
开关频率f/kHz	100

一种耦合电感增压直流变换器及其磁集成研究^*

A Research about DC-DC Converter with Coupled Inductor and Its Magnetic Integration Technology

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