冗余电源自动电流均衡控制策略  

Research on Automatic Current Equalization Control Strategy of Redundant Power Supply

作　　者：迟康伟 谢素霞 黄松 王锦浩 CHI Kangwei;XIE Suxia;HUANG Song;WANG Jinhao(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学机械工程学院,上海200093

出　　处：《电子科技》2024年第5期38-46,共9页Electronic Science and Technology

基　　金：国家重点研发计划(2018YFB0106300)。

摘　　要：冗余电源常用于需要不间断操作以及高可靠性的系统,当其作为N+1备份电源同时向设备供电时,还需考虑并联均流问题。针对无源冗余电源损耗大以及不能实现电流均衡的问题,文中采用了有源冗余的设计方案,设计了一个两路直流电压并联输入的1+1冗余供电系统。该系统采用兆易创新GD32E103为主控芯片,通过改变MOSFET(Metal-Oxide Semiconductor Field Effect Transistor)的导通电阻,采用PI(Proportional Integral)控制实现两路冗余电源输出电流的自动均衡。仿真和实验结果表明,有源冗余设计方案能达到自动电流均衡的目的。在正常工作时,两路电流的最大误差小于0.1 A,均流精度满足设计要求。Redundant power supplies are commonly used in systems that require long-term uninterrupted operation and high reliability.When redundant power supplies are used as N+1 backup power supplies to supply power to devices at the same time,parallel current sharing must be considered.In order to solve the problem of large loss of passive redundant power supply and inability to achieve current equalization,this study adopts the design scheme of active redundancy and designs a 1+1 redundant power supply system with two parallel DC voltage inputs.The system uses GD32E103 as the main control chip.By changing the on-resistance of MOSFET(Metal-Oxide Semiconductor Field Effect Transistor),PI(Proportional Integral)control is adopted to realize the automatic balance of the output current of two redundant power supplies.The simulation and experimental results show that the active redundancy design scheme can achieve the purpose of automatic current equalization.In normal operation,the maximum error of the two current channels is less than 0.1 A,and the accuracy of current sharing meets the design requirements.

关 键 词：冗余电源 场效应晶体管 比例积分控制 自动电流均衡 低功耗 高精度 微控制器 脉冲宽度调制 低电压 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]