一种宽范围270V转28V机载计算机电源设计  

Design of avionics computer 270V to 28V power supply with the wide range of input voltage

作　　者：刘卫华 闫稳 滕国飞 赵刚 Liu Weihua;Yan Wen;Teng Guofei;Zhao Gang(AVIC COMPUTING TECHNIQUE RESEARCH INSTITUTE,Shaanxi,Xi'an,710065)

机构地区：[1]中国航空工业集团公司西安航空计算技术研究所,陕西西安710065

出　　处：《信息通信》2020年第2期102-104,共3页Information & Communications

摘　　要：机载270V转28V计算机电源具有宽范围输入的特点,且负载往往也存在大范围变化,使软开关电源设计难度提升.针对该问题提出一种应用buck+LLC电路的设计,LLC工作在定频的开环控制状态,并在buck电路中引入电感电流闭环,在保证软开关效果的同时,增强了对输入电压和负载变化的抗扰性.在Matlab中的仿真结果证明了其有效性.The Characteristics,including wide-range variation of input voltage and load condition,increase the difficulty of design for avionics computer 270 V to 28 V power supply.To solve this problem,a design based on the buck+LLC circuit is proposed.In this strategy,LLC converter works at the open-loop-controlled soft-switching condition with the invariant switching frequency.Furthermore,inductor current feedback is employed for suppressing the disturbance of the input and load variation.Simulating results in Matlab testify the validity of the design.

关 键 词：计算机电源 BUCK LLC 闭环控制 

分 类 号：TM743[电气工程—电力系统及自动化]