浅析以太网供电技术(POE)的有效供电范围  

Brief Analysis on the Effective Power Supply Ranges of POE Technologies

作　　者：何鑫 王磊 He Xin;Wang Lei(Hunan Architectural Design Institute Co.,Ltd,Changsha 410000,China)

机构地区：[1]湖南省建筑设计院集团股份有限公司,长沙410000

出　　处：《智能建筑电气技术》2023年第3期110-114,共5页Electrical Technology of Intelligent Buildings

摘　　要：网络技术的发展使得以太网供电技术(Power Over Ethernet, POE)愈发成熟,本文从几代POE技术的发展入手,简述了POE供电的工作原理,建立了POE供电系统内在参数之间的简化数学模型,进一步分析了POE技术在理想状态下的有效供电范围,得出了POE供电回路下工作电流与受电端输入电压、回路线阻、负载功率等参数之间的数学关系,验证了IEEE Std 802.3af、802.3at和802.3bt等国际技术标准规定主要参数的合理性,为POE技术的应用提供了基础理论依据。The development of networks makes the Power Over Ethernet(POE)technology increasingly mature.In this paper,starting with the several generations of POE technology,the principles of POE power supply are briefly introduced,and the simplified mathematical models between the internal parameters of the POE system are established.Further,we analyze POE technologies'effective power supply ranges in the ideal states.The mathematical relationship between the current of the POE circuit and the main parameters,such as the input voltage at the power supply end,the line resistance,and the load power at the power receiving end,are obtained.Finally,the conclusions verify the rationality of the main parameters specified in the international technical standards such as IEEE Std 802.3af,802.3at,and 802.3bt,and provide a basic theoretical reference for the engineering application of POE technologies.

关 键 词：以太网供电(POE) 有效供电范围 

分 类 号：TN929.1[电子电信—通信与信息系统]