Design of DC power supply control system based on LLC resonant converter

被引：0
|
作者：
Mu K. [1 ]
Qi H. [2 ]
He G. [3 ]
机构：
[1] Henan University of Engineering, Zhengzhou
[2] Henan Senyuan Electric Co., Ltd., Zhengzhou
[3] Henan Engineering Research Center of Intelligent Power Transmission and Distribution and Power Conversion, College of Electrical and Control Engineering, Henan University of Urban Construction, Pingdingshan
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2020年 / 48卷 / 06期
基金：
中国国家自然科学基金;
关键词：
DC power supply; digital signal processing (DSP); LLC resonant converter; pulse frequency modulation (PFM);
D O I：
10.19783/j.cnki.pspc.190462
中图分类号：
学科分类号：
摘要：
The DC power supply based on LLC resonant converter has the advantages of a wide range of output voltage, high efficiency, small size and so on. This paper, firstly, analyzes the mathematical model of the three level half bridge LLC resonant converter. On this basis, the Pulse Frequency Modulation (PFM) control system which uses Digital Signal Processor (DSP) as the core is designed in the loop frequency modulation process, the loading times of cycle value and comparative value are not consistent, resulting in abnormal vibration of the circuit. In order to solve the problem, a method of assign cycle value and comparative value in the specific area is proposed. Finally, the result from the experiment shows that this method is effective. © 2020 Power System Protection and Control Press. All rights reserved.
引用
收藏
页码：152 / 157
页数：5
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