以太网供电PoE技术的研究与实现  

Research and Implementation of Power over Ethernet Technology

作　　者：王景忠[1] 王俊芳[1] 于立佳 王立莹[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]河北远东通信系统工程有限公司,河北石家庄050081

出　　处：《无线电工程》2012年第11期44-47,共4页Radio Engineering

基　　金：国防基础科研项目(B1120110001)

摘　　要：以太网供电(Power over Ethernet,POE)技术是一种在以太网上同时传输数据信号和直流电源的方法,促进了低功耗网络设备的应用。阐述了符合IEEE 802.3af标准的以太网供电技术的特点,详细介绍了采用PoE技术的系统构成及其供电过程。在此基础上完成了基于MAX5945的以太网供电设备和基于MAX5941的以太网受电设备的设计。所给出的理论和方法都通过实践检验,具有一定的实用性。Power over Ethernet technology defines a method that allows data and DC power to be delivered simultaneously over Ethernet.It can improve the applications of low-power network devices.The paper gives an analysis about the characteristics of PoE technology conforming to IEEE 802.3af standard.The structure and power supply process of the system adopting PoE technology are introduced in detail,and on that base,the power sourcing equipment based on MAX5945 and powered device based on MAX5941 are designed.The engineering practice shows the practicability of the theory and the methods.

关 键 词：IEEE 802 3af 以太网供电 MAX5945 MAX5941 

分 类 号：TN915[电子电信—通信与信息系统]