准谐振Flyback变换器分析与设计  

Analysis and Design of Quasi-resonant Flyback Converter

作　　者：吴庆 安少亮[1] 徐义轩 董松松 WU Qing;AN Shaoiang;XU Yixuan;DONG Songsong(School of Electrical Engineering,Xi'an University of Technology,Xi’an 710000,Shaanxi,China)

机构地区：[1]西安理工大学电气工程学院,陕西西安710000

出　　处：《电气传动》2024年第1期20-26,共7页Electric Drive

摘　　要：设计了一台65 W输出的准谐振反激变换器(QR-Flyback)。分析了QR-Flyback的谷底开通原理与开关损耗减小机制,对比了系统在不同工况下的频率特点与损耗特征,总结了变频控制的优势与不足。结合NCP1380控制器的跳频控制功能,对系统各部分的硬件电路参数进行详细设计,有效提升了整机效率。最后,通过仿真和实验验证了理论分析与参数设计的可行性。A quasi-resonant Flyback(QR-Flyback)converter with 65 W output was designed.The valley switching principle and the switching loss reduction mechanism of QR-Flyback were analyzed,the frequency and loss characteristics of the system under different working conditions were compared,and the advantages and disadvantages of frequency conversion control were summarized.Combined with the frequency hopping control function of the NCP1380 controller,the hardware circuit parameters of each part of the system were designed and the efficiency of the system was effectively improved.Finally,the feasibility of theoretical analysis and parameter design were verified by simulation and experiment.

关 键 词：准谐振反激变换器 谷底开通 跳频控制 

分 类 号：TM923[电气工程—电力电子与电力传动]