一种数字控制图腾柱无桥PFC的AC/DC电源  

Study on AC/DC Power Supply with Digital Control Totem-pole Bridgeless PFC

作　　者：吴雁飞 俞杭冬 WU Yanfei;YU Hangdong(Nanjing University of Science and Technology,School of Automation,Jiangsu 210094,China;ZJU-Hangzhou Global Scientific and Technological Innovation,Zhejiang 310017,China)

机构地区：[1]南京理工大学自动化学院,江苏210094 [2]浙江大学杭州国际科创中心,浙江310017

出　　处：《电子技术（上海）》2022年第1期4-6,共3页Electronic Technology

摘　　要：阐述一种临界电流模式图腾柱无桥PFC电路。采用基于DSP TMS320F28035的数字控制取代传统模拟控制,简化外围电路。提出一种数字ZCD方案,该方案实现不同输入电压下的零电压、谷底开通,满足高效、高功率密度的要求。以通信电源为例,研制一台176~265V ac输入,600W/28V直流输出的样机。前级PFC的峰值效率为98.8%,整机的峰值效率为94.6%,整机的功率密度达到110W/in^(3)。实验结果验证了设计方案的可行性和先进性。This paper introduces a critical current mode totem pole bridgeless PFC circuit.Digital control based on DSP TMS320 F28035 replaces traditional analog control and simplifies peripheral circuits.A digital ZCD scheme is proposed,which realizes zero voltage and valley turn-on under different input voltages,and meets the requirements of high efficiency and high power density.Taking the communication power supply as an example,a prototype with 176~265 V ac input and 600 W/28 V DC output was developed.The peak efficiency of the front-end PFC is 98.8%,the peak efficiency of the whole machine is 94.6%,and the power density of the whole machine is 110 W/in^(3).The experimental results verify the feasibility and advancement of the design scheme.

关 键 词：电源 图腾柱 数字控制 谐振变换器 

分 类 号：TN86[电子电信—信息与通信工程] TM461[电气工程—电器]