以太网供电系统及其功率扩展技术研究*

作者：胡 磊1，周永忠2，马 皓1 日期：2007-12-28/span> 浏览：3284 查看PDF文档

以太网供电系统及其功率扩展技术研究*
胡 磊1，周永忠2，马 皓1
（1.浙江大学 电气工程学院，浙江 杭州 310027； 2.杭州中信网络自动化有限公司，浙江 杭州 310012）

摘 要：在IEEE 802.3af协议下，利用新型以太网供电电能控制管理芯片，给出了含供电设备（PSE）和受电设备（PD）的标准以太网供电（PoE）系统设计方案，并分析了以太网供电原理和工作过程。给出了一种基于多变压器并联的以太网供电功率扩展方案，并给出了适应于扩展后功率的功率分级方案，解决了供电功率扩展问题，有利于提高以太网供电的应用范围。
关键词：以太网供电；IEEE 802.3af协议；供电设备；受电设备

Research on power over ethernet system and the technology of power expansion
HU Lei1, ZHOU Yong zhong2, MA Hao1
(1.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;
(2.Hangzhou Sinocom Network Automation Co., Ltd., Hangzhou 310012, China)
Abstract: By means of novel manage control chip of power over ethernet, the system design strategy of standard power over ethernet (PoE) constructed by power sourcing equipment (PSE) and power device (PD) was proposed based on IEEE 802.3af protocol, and the principle and working process of ethernet power supply were analyzed. The power expansion plan of power over ethernet was presented based on multi|transformer paralleling. Correspondingly the power classification strategy suitable for expanded power is given, which solves the problem of power expansion and improves the application range of power over ethernet.
Key words: power over ethernet (PoE); IEEE 802.3af protocol; power sourcing equipment (PSE)；power device(PD)

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