PFM+PSM hybrid control of CLLLC resonant converter

被引：0
|
作者：
Deng Q. [1 ]
He Y. [1 ,2 ]
Lei C. [1 ]
Liu J. [1 ]
机构：
[1] College of Electrical Engineering, Xi'an Jiaotong University, Xi'an
[2] Electrical Engineering College, Aalborg University, Aalborg
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2022年 / 42卷 / 02期
基金：
中国国家自然科学基金;
关键词：
CLLLC resonant converter; PFM+PSM hybrid control; Time-domain analysis method; Wide-range soft switching;
D O I：
10.16081/j.epae.202110006
中图分类号：
学科分类号：
摘要：
Aiming at the problem of CLLLC resonant converter, such as insufficient voltage gain range with pulse-frequency modulation and low efficiency with phase-shift modulation, a PFM+PSM(Pulse-Frequency Modulation and Phase-Shift Modulation) hybrid control method is proposed, which can adjust the duty ratio of switch tube and the switching frequency at the same time. This method can freely switch the hybrid control mode according to the input voltage range and load power variation range to achieve wide-range soft switching and high operating efficiency, with very high freedom degree of regulation. The soft start is achieved by reducing the impulse current during start-up stage with phase-shift control. Finally, the model of CLLLC resonant converter is established based on time-domain analysis, and the experimental platform of 1 kW CLLLC resonant converter based on SiC(Silicon Carbide) is built. Experimental results verify the feasibility and superiority of the proposed hybrid control method, and the efficiency of the whole machine can reach 96 % in a wide range. © 2022, Electric Power Automation Equipment Press. All right reserved.
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收藏
页码：148 / 154
页数：6
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