CN101112043B - System, method and LAN for controlling power distribution among multiple wires of communication cables - Google Patents

System, method and LAN for controlling power distribution among multiple wires of communication cables Download PDF

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CN101112043B
CN101112043B CN 200680003199 CN200680003199A CN101112043B CN 101112043 B CN101112043 B CN 101112043B CN 200680003199 CN200680003199 CN 200680003199 CN 200680003199 A CN200680003199 A CN 200680003199A CN 101112043 B CN101112043 B CN 101112043B
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current
pair
power distribution
conductors
power
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CN 200680003199
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CN101112043A (en
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D·M·德韦利
J·赫博尔德
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凌特公司
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Priority to US60/646,509 priority
Priority to US11/334,733 priority patent/US7827418B2/en
Priority to US11/334,733 priority
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Priority to PCT/US2006/002241 priority patent/WO2006081166A2/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/32End-user application control systems
    • Y02B70/3208End-user application control systems characterised by the aim of the control
    • Y02B70/3241Domotics or building automation systems
    • Y02B70/325Domotics or building automation systems involving home automation communication networks
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/32End-user application control systems
    • Y02B70/3258End-user application control systems characterised by the end-user application
    • Y02B70/3266The end-user application being or involving home appliances
    • Y02B70/3275The home appliances being or involving heating ventilating or air conditioning [HVAC] units
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20Systems integrating technologies related to power network operation and communication or information technologies mediating in the improvement of the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as enabling technology in buildings sector
    • Y02B90/26Communication technology specific aspects
    • Y02B90/2607Communication technology specific aspects characterised by data transport means between the monitoring, controlling or managing units and the monitored, controlled or operated electrical equipment
    • Y02B90/2638Communication technology specific aspects characterised by data transport means between the monitoring, controlling or managing units and the monitored, controlled or operated electrical equipment using a wired telecommunication network or a data transmission bus
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20Systems integrating technologies related to power network operation and communication or information technologies mediating in the improvement of the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as enabling technology in buildings sector
    • Y02B90/26Communication technology specific aspects
    • Y02B90/2607Communication technology specific aspects characterised by data transport means between the monitoring, controlling or managing units and the monitored, controlled or operated electrical equipment
    • Y02B90/2646Communication technology specific aspects characterised by data transport means between the monitoring, controlling or managing units and the monitored, controlled or operated electrical equipment using phone lines
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20Systems integrating technologies related to power network operation and communication or information technologies mediating in the improvement of the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as enabling technology in buildings sector
    • Y02B90/26Communication technology specific aspects
    • Y02B90/2607Communication technology specific aspects characterised by data transport means between the monitoring, controlling or managing units and the monitored, controlled or operated electrical equipment
    • Y02B90/2653Communication technology specific aspects characterised by data transport means between the monitoring, controlling or managing units and the monitored, controlled or operated electrical equipment using wireless data transmission
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20Systems integrating technologies related to power network operation and communication or information technologies mediating in the improvement of the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as enabling technology in buildings sector
    • Y02B90/26Communication technology specific aspects
    • Y02B90/2607Communication technology specific aspects characterised by data transport means between the monitoring, controlling or managing units and the monitored, controlled or operated electrical equipment
    • Y02B90/2669Communication technology specific aspects characterised by data transport means between the monitoring, controlling or managing units and the monitored, controlled or operated electrical equipment involving the use of Internet protocol
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00Systems supporting the management or operation of end-user stationary applications, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y04S20/20End-user application control systems
    • Y04S20/22End-user application control systems characterised by the aim of the control
    • Y04S20/227Domotics or building automation systems
    • Y04S20/228Characterised by involving a home automation communication network
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00Systems supporting the management or operation of end-user stationary applications, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y04S20/20End-user application control systems
    • Y04S20/24End-user application control systems characterised by the end-user application
    • Y04S20/242End-user application control systems characterised by the end-user application the end-user application being or involving home appliances
    • Y04S20/244End-user application control systems characterised by the end-user application the end-user application being or involving home appliances the home appliances being or involving heating ventilating and air conditioning [HVAC] units
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/10Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by communication technology
    • Y04S40/12Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by communication technology characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by communication technology characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/10Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by communication technology
    • Y04S40/12Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by communication technology characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/125Using phone lines
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/10Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by communication technology
    • Y04S40/12Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by communication technology characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126Using wireless data transmission
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
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    • Y04S40/12Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by communication technology characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/128Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by communication technology characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment involving the use of Internet protocol

Abstract

A novel system for providing power over the Ethernet includes a current limit circuit for preventing an output current from exceeding a current threshold set at a prescribed level, and a foldback circuit for reducing the current threshold when an output voltage is lower than a prescribed voltage value. The foldback circuit may be controlled to operate in a high-power mode to increase the current threshold above the prescribed level.

Description

控制通信电缆中多个导线之间的电力分配的系统、方法和 Controlling the power distribution between the plurality of conductors in a communication cable systems, methods, and

局域网 local area network

[0001] 本申请要求美国临时专利申请号60/646,509的优先权,该申请的申请日为2005 年1月25日,发明名称为"支持先进的以太网供电系统的系统和方法"。 [0001] This application claims priority to US Provisional Patent Application No. 60 / 646,509, the filing date of the application is January 25, 2005, entitled "System and method for advanced support Power over Ethernet systems."

技术领域 FIELD

[0002] 本发明涉及供电系统,更具体地讲,涉及用于控制通过通信电缆供电的系统中通信电缆的多根导线之间的电力分配的电路和方法。 [0002] The present invention relates to power supply systems, and more particularly, to a circuit and method for communication between a plurality of wires of a communication cable in the cable system for controlling the power supply by the power distribution.

背景技术 Background technique

[0003] 在过去若干年中,以太网已成为局域网络最常用的方法。 [0003] In the past several years, Ethernet has become the most commonly used method for local area networks. IEEE 802. 3组,以太网标准的发起人,已开发了该标准的延伸形式,称作IEEE 802. 3af,定义通过以太网电缆供电。 IEEE 802. 3 group, the Ethernet standard promoters have been developed in the form of extension of the standard, known as IEEE 802. 3af, the definition of power over Ethernet cabling. IEEE 802. 3af标准定义了以太网供电(PoE)系统,该系统涉及通过非屏蔽双绞线将电力从供电设备(PSE)传输到位于链路相对侧的用电设备(PD)。 IEEE 802. 3af standard defines a Power over Ethernet (PoE) system that involves unshielded twisted pair transmission power from the power supply device (PSE) located on the opposite side of the link powered device (PD). 传统上,网络设备诸如IP电话, 无线LAN接入点,个人计算机和网络摄像机需要两个连接:一个连至LAN,而另一个连至供电系统。 Traditionally, network devices such as IP phones, wireless LAN access points, personal computers and Web cameras required two connections: one to the LAN, and the other is connected to the power supply system. 所述PoE系统消除了需要额外的插口和接线,以向网络设备供电。 The PoE system eliminates the need for additional outlets and wiring to supply power to network devices. 取而代之的是, 通过用于数据传输的以太网电缆供电。 Instead, powered via an Ethernet cable for data transmission.

[0004] 如IEEE 802. 3af标准中所定义的,PSE和PD是非数据实体,允许网络设备使用与用于数据传输同类的电缆供电和获得电力。 [0004] The IEEE 802. 3af defined standard, PSE and PD are non-data entities allowing network devices using the same power supply cable for data transfer and access power. PSE是在物理连接点电连接至电缆的设备,它向链路供电。 PSE is a physical connection point electrically connected to the device cable, which power to a link. PSE通常与以太网交换机,路由器,集线器或其他网络交换设备或中跨供电设备相连。 PSE is typically the Ethernet switch, router, hub or other network switching equipment or midspan power supply apparatus is connected. PD是获得供电或请求供电的设备。 Obtaining PD requesting power supply or device. PD可以与诸如数字IP电话,无线网络接入点, PDA或笔记本电脑扩展坞,移动电话充电器和HVAC恒温器等设备相连。 PD may dock with such as digital IP telephones, wireless network access points, PDA or notebook computer, is connected to a mobile phone chargers and HVAC thermostats and other equipment.

[0005] PSE的主要功能是为请求供电的PD搜索链路,可选地对PD进行分级,如果检测到PD则向所述链路供电,监测链路上的供电,并且当不再请求或者需要时切断电源。 [0005] The main functions of the PSE are to search the link PD requesting power, optionally classify the PD, the PD is detected if the power supply to the link, the link monitoring the power supply, and when no request or cut off the power when needed. PD通过呈现由IEEE802. 3标准定义的PoE检测信号来参与PD检测过程。 By presenting PoE detection signal PD by the IEEE802. 3 standard definition to participate in the PD detection procedure.

[0006] 如果所述检测信号有效,PD可以选择向PSE呈现分级信号,以表示在上电时它会提取多少电能。 [0006] If the detection signal is valid, the PD may present hierarchical selection signal, to indicate when the power to how much power it will extract the PSE. 根据PD的确定级别,PSE向PD提供所需的电力。 According to determine the level of PD, PSE provides the required power to the PD.

[0007] IEEE 802. 3af标准描述了通过利用CAT-5电缆中4根双绞线的2根之间的共模电压,通过以太网供电。 [0007] IEEE 802. 3af described by using standard CAT-5 cable common mode voltage between the two twisted pairs 4, Power over Ethernet. 目前,所述规定要求通常包含在非屏蔽双绞线(UTP)CAT-5电缆内8根导线中的4根供电。 Currently, the requirements contained in the typically four power conductors 8 within the CAT-5 unshielded twisted pair cable (UTP). 未来提供更多电力的努力可利用电缆中的所有四对双绞线。 Future efforts to provide more electricity available for all four pairs of twisted-pair cable. 采用第二组导线对会产生通过电缆传送和返回电流的第二通道。 A second channel using a second set of wires and a cable transmitting the return current is generated.

[0008] 由于电缆中的导线原来只是用于数据传输,它们具有有限的电流输送能力。 [0008] Since the cable wires originally only for data transmission, they have a limited current-carrying capacity. 因为可以采用多个导线或多组导线来传输电力,希望平衡导线之间的电力,以提供最有效的电力传输作业。 Since a plurality of wires may be used to transmit power or a group of wires, the desired balance between the power conductors, to provide the most efficient power transmission job.

发明内容 SUMMARY

[0009] 本发明提供了一种新型的系统和方法,用于通过通信电缆,如以太网电缆供电,使用电力分配电路来控制通信电缆中导线或导线对之间的电力分配。 [0009] The present invention provides a novel system and method used by a communication cable, such as an Ethernet cable powered, electric power distribution circuit to control the power distribution between the communication conductor or cable pairs.

[0010] 按照本发明的一个方面,所述电力分配电路可以控制通信电缆中导线或导线对之间的电流分配。 [0010] According to an aspect of the present invention, the power distribution circuit may control the communication between the current distribution in the conductor or cable pairs. 例如,可以提供导线或导线对之间的电流平衡。 For example, current balance can be provided between the conductor or pair.

[0011] 为控制电缆中一对导线内第一和第二导线之间的电流分配,用于将供电设备接至通信电缆的变压器线圈可被分成对应第一导线的第一线圈,和对应第二导线的第二线圈。 [0011] The control current distribution in the cable between the first and second conductors within a pair of wires, the power supply apparatus for a communication cable connected to the transformer windings may be divided into a first coil corresponding to the first conductor, and a corresponding first two of the second coil wire. 可在第一和第二线圈之间插入电容元件,以防第一和第二导线之间的DC连接。 A capacitive element may be inserted between the first and second coils, to prevent a DC connection between the first and second conductors.

[0012] 根据本发明的示例性实施例,所述电力分配电路可以包括用于提供参考电压的参考电路,对应第一和第二导线或导线对的第一和第二感应电阻,和分别将参考电压和第一和第二感应电阻两端的第一和第二感应电压作比较的第一和第二运算放大器。 [0012] According to an exemplary embodiment of the present invention, the power distribution circuitry may comprise a reference circuit providing a reference voltage, corresponding to the first and second conductor or the first and second pairs of sensing resistors, respectively, and first and second reference voltages and the first and second inductive sensing voltage across the resistor for comparing the first and second operational amplifiers.

[0013] 所述电力分配电路还可以包括第一和第二驱动元件,分别接至第一和第二运算放大器的输出,用于控制第一和第二导线或导线对的电流值。 [0013] The power distribution circuitry may further comprise a first and second drive elements, respectively connected to outputs of the first and the second operational amplifier, for controlling the first and second conductors to the conductors or current value. 第一和第二驱动元件的每一个可以包括M0SFET晶体管。 Each of the first and second driving elements may include M0SFET transistor.

[0014] 根据本发明的另一个示例性实施例,所述电力分配电路可以包括用于提供参考电压的参考电路,对应第一导线或导线对的第一感应电阻,和用于将参考电压和第一感应电阻两端的第一感应电压作比较的限流放大器,以根据参考电压限制第一导线或导线对中的电流值。 [0014] According to another exemplary embodiment of the present invention, the power distribution circuitry may comprise a reference circuit providing a reference voltage, corresponding to the first conductor or to a first sensing resistor, and a reference voltage and first sensing voltage across the sensing resistor as a first comparison limit amplifier, a current value of the first conductor or conductor pair according to a reference voltage limit.

[0015] 所述电力分配电路还可以包括对应第二导线或导线对的第二感应电阻,和平衡放大器,所述平衡放大器用于将第二感应电阻两端的第二感应电压和第一感应电压作比较, 以在第一和第二导线或导线对的电流值之间提供平衡。 [0015] The power distribution circuitry may further comprise a second sensing resistor corresponding to the second conductor or conductor pair, and balanced amplifier, said balanced amplifier for sensing a second voltage across the second sensing resistor and the first sensing voltage compared to provide a balance between the first and second conductors or conductor pairs of a current value. 第一和第二驱动元件可分别接至限流放大器和平衡放大器的输出,用于控制第一和第二导线或导线对中的电流值。 The first and second driving elements may be respectively connected to the balanced amplifier and the limiting amplifier output, the current value for controlling the first and second conductor or pair. 第一和第二驱动元件的每一个可以包括一个或多个M0SFET晶体管。 Each of the first and second driving elements may include one or more M0SFET transistors.

[0016] 根据本发明的另一个示例性的实施例,所述电力分配电路可以包括一对电流感应元件和第一差分放大器,所述差分放大器用于产生一信号,表示由电流感应元件产生的信号之间的差异。 [0016] According to another exemplary embodiment of the present invention, the power distribution circuitry may comprise a pair of current sensing element, and a first differential amplifier, the differential amplifier for generating a signal representative of the current generated by the sensing element the difference between the signals. 一对第二和第三差分放大器可以具有第一输入,用于接收第一差分放大器的输出,和第二输入,用于接收相应的参考值。 A pair of second and third differential amplifier may have a first input for receiving the output of the first differential amplifier and a second input for receiving a respective reference value. 提供给第二差分放大器的参考值可能不同于提供给第三差分放大器的参考值。 Is supplied to the second differential amplifier may differ from a reference value supplied to the reference value of the third differential amplifier. 第一和第二驱动元件可被分别接至第二和第三差分放大器的输出,用于控制相应导线中的电流值。 The first and second driving elements may be respectively connected to the second and third differential output of the amplifier, for controlling the current value of the corresponding wire.

[0017] 按照本发明的另一方面,局域网可以包括至少一对网络节点,网络集线器,和具有至少一对导线用于将网络节点连接至网络集线器以提供数据通信的通信电缆。 [0017] According to another aspect of the present invention, the local area network may comprise at least a pair of network nodes, a network hub, and having at least a pair of wires for connecting the network nodes to the network hub to provide data communications of the communication cable. 所述网络集线器具有供电设备,用于通过通信电缆向负载供电。 The network hub having a power supply device for supply to a load via a communication cable. 所述网络可以包括电力分配电路,用于控制导线或导线对之间的电力分配。 The network may include a power distribution circuit for controlling the power distribution between the wires or wire pairs.

[0018] 通过以下详细说明,本领域技术人员会更方便地理解本发明的其他优点和方面, 其中仅通过说明实施本发明的最佳方式的形式,示出并且披露了本发明的实施例。 [0018] The following detailed description, those skilled in the art will more easily understand other advantages and aspects of the present invention, in which only by way of illustration preferred embodiments of the present invention forms shown and disclosed embodiments of the present invention. 正如所要披露的,本发明能够以其他和不同的实施例实施,并且它的若干细节能够以各种显而易见的方式进行改进,所有这样的改进不偏离本发明的构思。 As will be disclosed, the present invention is capable of other embodiments and different embodiments, and its several details are capable of modification in various obvious ways, all such modifications without departing from the inventive concept. 因此,附图和说明被视为是说明性的,而不是限制性的。 Accordingly, the drawings and description are to be regarded as illustrative, and not restrictive.

附图说明 BRIEF DESCRIPTION

[0019] 以下对本发明实施例的详细说明通过结合以下附图能够得到最佳的理解,其中特征不一定按比例绘制,而是以最佳示出相关部件的形式绘制,其中: [0019] The following detailed description of embodiments of the present invention in conjunction with the following drawings can be best be understood, wherein the features are not necessarily drawn to scale, but are drawn to best illustrate the relevant parts in the form, wherein:

[0020] 图1示出本发明的PoE系统的示意图。 [0020] FIG 1 illustrates a PoE system of the present invention. FIG.

[0021] 图2示出本发明的电力分配系统,其中,在双绞线之间分配电力。 [0021] FIG 2 illustrates the power distribution system of the present invention, wherein the power distribution between the twisted pairs.

[0022] 图3示出本发明的电力分配系统,其中,在双绞线中的导线之间分配电力。 [0022] FIG. 3 illustrates the power distribution system of the present invention, wherein the power distribution between the twisted pairs of conductors.

[0023] 图4示出根据本发明的第一示例性实施例的电流平衡电路。 [0023] Figure 4 shows a current balance circuit according to a first exemplary embodiment of the present invention.

[0024] 图5示出根据本发明的第二示例性实施例的电流平衡电路。 [0024] FIG. 5 shows a current balance circuit according to a second exemplary embodiment of the present invention.

[0025] 图6示出根据本发明的第三示例性实施例的电流平衡电路。 [0025] FIG. 6 shows a current balance circuit according to a third exemplary embodiment of the present invention.

具体实施方式 Detailed ways

[0026] 本发明将利用PoE系统中电力分配电路的示例进行说明。 [0026] The present invention will use the example of a PoE system power distribution circuit will be described. 不过,显而易见,本文所披露的构思可应用于通过电缆供电的任何系统。 However, it is apparent, the concepts disclosed herein may be applied to any system powered through a cable. 例如,本发明的系统可用在局域网(LAN) 上,所述局域网具有多个节点,网络集线器和将节点连接至网络集线器用于提供数据通信的通信电缆。 For example, the system of the present invention can be used on a local area network (LAN), a local area network having a plurality of nodes, a network hub and nodes connected to the network hub for providing data communication with a communication cable. 所述网络集线器可以包括供电设备,用于通过通信电缆向负载供电。 The network hub may include a power supply device for supply to a load via a communication cable. 本发明的电力分配系统可用来控制通信电缆中导线或导线对之间的电力分配。 The power distribution system of the present invention may be used to control the power distribution between the communication conductor or cable pairs.

[0027] 图1示出简化的方框图,示出以太网供电(PoE)系统10包括供电设备(PSE)12,具有多个端口1-4通过相应的链路可连接到用电设备14(PD1-PD4),每个链路可用以太网电缆16内的2或4组双绞线提供。 [0027] Figure 1 shows a simplified block diagram illustrating a Power over Ethernet (PoE) system 10 includes a power supply device (PSE) 12, having a plurality of ports may be connected to the electrical device 1-4 via respective links 14 (PD1 -PD4), each link 2, or 4 groups available Ethernet twisted pairs within the cable 16 provided. 尽管图1示出了PSE12的四个端口,本领域技术人员会认识到,可以提供任意数量的端口。 Although FIG. 1 shows four ports PSE12, one skilled in the art will recognize that any number of ports may be provided.

[0028] 按照IEEE 802. 3af标准,PSE12可以与每个PD相互作用。 [0028] in accordance with the standard IEEE 802. 3af, PSE 12 may interact with each PD. 具体地讲,PSE12和PD 参与PD检测程序,在此期间,PSE12探查链路以检测PD。 In particular, PSE 12 and the PD participate in the PD detection procedure, during which, PSE 12 probes a link to detect a PD. 如果检测到PD,PSE12检查PD检测信号,以确定它是有效还是无效的。 If the PD is detected, PSE 12 checks the PD detection signal to determine whether it is valid or invalid. 有效和无效的检测信号在IEEE 802.3af标准中有定义。 Valid and invalid detection signal is defined in the IEEE 802.3af standard. 有效的PD检测信号表示PD处于会接受供电的状态,而无效的PD检测信号表示PD处于不会接受供电的状态。 A valid PD detection signature indicates that the PD is in a state will accept power, the non-valid PD detection signature indicates that the PD is in a state not accept power.

[0029] 如果所述信号有效,PD可以选择向PSE呈现分级信号,以表示在上电时会提取多少电能。 [0029] If the signal is valid, the PD may be selected classification signal presented to indicate how much power when the power to be extracted PSE. 例如,可以将PD分成级别0到级别4。 For example, PD may be classified into level 0 to level 4. 根据PD确定的级别,PSE向PD提供所需的电力。 According to determine the level of PD, PSE provides the required power to the PD.

[0030] 为了向PD提供更多的电力,可能必须在以太网电缆16中使用更多的导线。 [0030] In order to provide more power to the PD, you may have to use more wires in the Ethernet cable 16. 当使用多根导线或导线组时,它们之间的电力分配就变得非常重要。 When using a plurality of wires or wire group, the power distribution between them becomes very important.

[0031] 具体地讲,电力分配使得更有效利用以太网电缆成为可能。 [0031] Specifically, the power distribution such that more efficient use of Ethernet cable becomes possible. 如果电缆由n个导线组成,每个的最大负载量为4,当一半的导线被用于向PD提供电流而另一半导线被用于返回电流到PSE时,电缆可以输送的最大功率Z为Z = nC /2。 If the cable is composed of n wires, each of the maximum loading is 4, when the half of wires are used to provide current to the wire PD and the other half is used to return current maximum power PSE, the cable can be transported and Z is Z = nC / 2. 因此,为了更有效地使用电缆, 导线之间的电力分配必须使得没有单根导线的承载大于4。 Accordingly, in order to more effectively use the cable, the power distribution between the wires must be such that no single carrying conductor is greater than 4.

[0032] 即使电缆不是以其最大负载量Z传送,当通过每根导线传送的电力相等时(假设每根导线具有相等的负载量(),通过电缆的功率损耗减少。因此,平衡电缆中导线之间的电力是有益的。相应的,如果n个相同的导线输送功率P,传送所述功率最有效的方式是平衡功率,使得在每根导线上传送功率P,其中,P = P/n。当一半的导线被用于传送电流,而另一半的导线被用于返回电流时,该公式为P = P/2n。 [0032] Even if the cable is not at its maximum load Z transmitted through the wire when the power of each transmission is equal to (assuming each conductor has an equal load (), to reduce the power loss through the cable. Thus, in the balanced cable conductor between power is beneficial. Accordingly, if there are n identical wire delivery power P, the power transmission is the most effective way to balance the power, so that the transmission power P in each wire, where, P = P / n when half of the wires are used to carry the current, while the other half is used to return current conductor, the formula P = P / 2n.

[0033] 另外,当电流流过导线,由于导线的电阻R会出现某些功率损耗。 [0033] Further, when the current flow through the wire, since the wire resistance R will be some power dissipation. 如果在导线的输入端施加电压\,并且电流I流过导线,在导线输出端的电压\为\ = HR。 If the voltage is applied to the input end of the wire \, and a current I flows through the wire, the wire in the voltage output of the \ to \ = HR. 因此,由于导线传输而造成的功率损耗= 1(\、)=I2R。 Accordingly, since the wire transmission and the power loss caused = 1 (\,) = I2R. 因此,当电流流过由具有相同电阻R的相同导线组成的电缆,并且在每根导线上施加的电压相同时,由于电力传输造成的功率损耗在流过每根导线的电流为最小时是最小的。 Thus, when current flows through the cable by the same wires have the same resistance R of the composition, and the applied voltage in each wire is the same, since the current of each wire of the power transmission power loss caused by the flow through is the minimum is the minimum of. 当所有的n根导线承载相同的电流I/n时, 每根导线中的电流最小。 When all of the n conductors carry the same current I / n, each wire of minimum current.

[0034] 当组成电缆的导线相同时,应当平衡电流,以在每根导线中提供相同的电流,以便实现节电。 [0034] When the same wires in a cable, the current should be balanced to provide the same current in each conductor in order to save power. 当电缆中的导线不同时,优选控制每根导线的电流水平,以获得最大效率。 When the cable wires are not at the same time, it is preferable to control the current level of each wire, in order to obtain maximum efficiency.

[0035] 尽管本发明利用平衡导线之间的电流以提供理想的电力分配的电流平衡电路的示例来说明,本领域技术人员会认识到,还可以控制供电系统的其他参数,以在导线之间分配电力。 [0035] Although the present invention with a current conductor to provide a balance between current balancing circuit example of the power distribution to the ideal description, one skilled in the art will recognize that other parameters may also control the power supply system, to the wire between distribution of electric power. 例如,可以通过控制施加在每个导线上的电压或控制通过其向每根导线施加电流的电阻来实现电力分配。 For example, the power distribution can be achieved by controlling the applied voltage or control on each conductor through which current is applied to the resistance of each wire.

[0036] 另外,根据本发明的示例性实施例,电力分配控制发生在电缆供电的一端。 [0036] Further, according to an exemplary embodiment of the present invention, the power distribution end of the control cable occurs in the power supply. 不过, 本领域技术人员会认识到,本发明的电力分配控制可以在电缆耗电的一端进行。 However, one skilled in the art will recognize, the power distribution control of the present invention may be carried out at one end of the power cable.

[0037] 另外,本领域技术人员会认识到,除了控制或平衡每根导线中的电流之外,本发明的电力分配控制可以通过控制或平衡每根导线的输出电压,每根导线的功率损耗,每根导线和电源的电阻,每根导线的温度等来实现。 [0037] Additionally, one skilled in the art will recognize that, in addition to control or balance the current in each conductor, the power distribution control of the present invention may be balanced by controlling the output voltage or each conductor, each conductor of the power loss , the resistance of each wire and a power supply, the temperature of each wire like.

[0038] 另外,本领域技术人员会认识到,本发明的电力分配控制方法不需要连续测量参数,如导线电阻或输出电压。 [0038] Additionally, one skilled in the art will recognize, the power distribution control method of the present invention does not require the continuous measurement of parameters, such as wire resistance or the output voltage. 例如,在供电之前确定的导线电阻可用于控制供电之后的电力传输。 For example, before the power supply conductor resistance may be used for determining the transmission power after the control power supply. 例如,可以利用时域反射仪(TDR),通过向导线施加高频脉冲,并测量表示导线阻抗变化的返回信号,来测量导线电阻。 For example, by using time domain reflectometry (TDR), is applied to the wire by a high-frequency pulse, and measuring the change in lead impedance indicates a return signal, measured conductor resistance.

[0039] 参见图2,本发明的示例性电力分配系统包括电流平衡电路102和104,用于在以太网电缆16的4个双绞线之间平衡由PSE电源106提供的电力。 [0039] Power Referring to FIG 2, an exemplary power distribution system according to the present invention includes a current balancing circuits 102 and 104 for between four twisted-pair Ethernet cable 16 provided by the PSE power balance 106. 具体地讲,在以太网电缆16的PSE侧,变压器108和110将电流平衡电路102接至图2所示上面的2个双绞线,而变压器112和114将电流平衡电路104接至图2所示下面的2个双绞线。 In particular, the PSE side of the Ethernet cable 16, transformers 108 and 110 connected to a current balancing circuit 102 to the twisted pair 2 as shown in FIG. 2 above, the current transformer 112 and 114 connected to balancing circuit 104 in FIG. 2 two twisted pairs shown below. 例如,上面的2个双绞线可用于从PSE12向PD14传送电流,而下面的2个双绞线可以为从PD14到PSE12的电流提供返回路径。 For example, the above two twisted pairs may be used to carry the current from PSE12 PD14, while the lower two twisted pairs may provide a return path for the current from the PD14 to PSE12.

[0040] 在电缆16的PD侧,变压器116和118通过分别由二极管124,126和128,130组成的二极管电桥将上面的2个双绞线接至PD电路。 [0040] In the PD 16 side of the cable, transformer 118 through a diode 116 and a diode bridge 124, 126 and 128, 130 are composed of the above two wires connect to the PD circuitry. 变压器120和122通过分别由二极管132,134和136,138组成的二极管电桥将下面的2个双绞线接至PD电路。 Transformers 120 and 122, respectively, by a diode bridge composed of diodes 132, 134 and 136 will be below two wires connect to the PD circuitry. 所述二极管电桥被设置成不管用哪个双绞线传送或返回电流,使PD电路都能够接收电力。 The diode bridge is arranged to transmit with no matter which UTP or return current, the circuit capable of receiving power PD. 变压器108-122 可以是以太网数据传输系统的数据变压器。 108-122 transformer transformer Ethernet data may be a data transmission system. 为了保持附图的清晰,图2仅示出了每个所述变压器的一个线圈。 In order to maintain clarity of the drawings, FIG. 2 shows only one coil of each of the transformer. 如IEEE 802. 3af标准所描述的,变压器的其他线圈被用于将以太网物理层(PHY)设备接至电缆16。 As described in the standard IEEE 802. 3af, the other coil of the transformer is used for the Ethernet physical layer (PHY) device 16 connected to the cable.

[0041] 电流平衡电路102控制由PSE电源106提供的电力,以便在用于从PSE12向PD14 传送电流的上面2个双绞线的每一个中提供相同的电流。 [0041] The current balance circuit 102 controls the power provided by the PSE power supply 106, so as to provide the same current from each of the above PD14 to carry current PSE12 two twisted pairs. 电流平衡电路104使得用于从PD14向PSE12返回电流的下面2个双绞线的每一个中承载相同的电流。 Such that the current balancing circuit 104 for each of the return current from the PD14 to PSE12 following two twisted pairs in the same current carrying. 尽管图2所示的装置在PSE侧处理电流平衡,本领域技术人员会认识到,所述电流平衡可以在PD侧实施。 Although the processing apparatus shown in FIG current balancing PSE side, those skilled in the art will recognize that the current balancing can be implemented in PD side.

[0042] 参见图3,本发明的电流平衡电路可用于在双绞线内的每个导线中提供相同的电流。 [0042] Referring to Figure 3, each conductor current balancing circuit according to the present invention can be used in a twisted pair is provided in the same current. 接至电缆16中双绞线的以太网数据变压器的每个线圈可被分成两个线圈。 Twisted pair cable 16 connected to the Ethernet data in each coil of the transformer may be divided into two coils. 为了保持附图的清晰,图3仅示出了单个以太网数据变压器202接至单个双绞线。 In order to maintain clarity of the drawings, FIG. 3 only shows a single Ethernet data transformer 202 connected to a single twisted pair. 不过,本领域技术人员会认识到,图2所示的所有以太网数据变压器可以类似的方式设置。 However, those skilled in the art will recognize that all Ethernet data transformers shown in FIG. 2 may be provided in similar manner. 数据变压器202 可在分开的线圈之间提供电容C,连接相应双绞线的导线A和B,以提供以太网数据的AC路径,但防止DC电流流过线圈。 Transformer 202 may provide data between separate coils capacitance C, connected to a respective twisted pair of conductors A and B, to provide an AC path Ethernet data, but prevents a DC current flows through the coil. 因此,每个双绞线内的导线A和B不再彼此DC连接。 Thus, the wires A and B within each twisted pair not DC connected to each other.

[0043] 通过变压器204的相应线圈,双绞线中的导线A和B可以与电流平衡电路206连接,所述电流平衡电路控制来自PSE电源208的电力,以在每个双绞线内的导线A和B的每一个中提供相同的DC电流。 [0043], the twisted pair wires 206 A and B may be connected by a respective winding of the transformer 204 to the current balance circuit, said current balancing circuit controls power from the PSE source 208, wires are twisted pairs within each each of a and B provide the same DC current. 如果过大的直流电流通过数据变压器202的线圈,它的核心会饱和。 If excessive DC current through the coil 202 of the transformer data, its core is saturated. 结果,数据变压器202不会正常工作,并且可能妨碍以太网数据传输。 As a result, the data transformer 202 does not work properly, and may interfere with transmission of Ethernet data. 电流平衡电路206可以平衡双绞线的导线之间的电流,以防止接头触点、电缆或配线设备其他元件的电阻在一个或另一个导线中弓丨起过高的直流电流,并使数据变压器202饱和。 Current balancing circuit 206 can balance the current between the conductors of the twisted pairs, to prevent the contact resistance of the joint, other elements of a cable or wiring devices in one or another wire bow Shu from excessive DC current, and the data 202 transformer saturation.

[0044] 图4示出本发明的示例性实施例,其中,电流平衡电路包括运算放大器302和304, 分别驱动M0SFET 306和308的栅极。 [0044] FIG 4 illustrates an exemplary embodiment of the present invention, wherein the current balancing circuit comprises an operational amplifier 302 and 304, respectively, and the gate of the drive M0SFET 306 308. 感应电阻Rsensel和Rsense2分别接至M0SFET 306和308。 Rsensel Rsense2 sensing resistor and respectively connected to M0SFET 306 and 308. 参考电压源310可以对放大器302和304的非反相输入施加参考电压V,ef。 A reference voltage source 310 may apply the reference voltage V, ef of the amplifier 302 and the non-inverting input 304. 放大器302的反相输入可由感应电阻Rs6ns6l两端形成的电压Vs6ns6l提供,而放大器304的反相输入可由感应电阻Rs6ns62两端产生的电压V應e2提供。 Inverting input of amplifier 302 by sensing voltage developed across resistor Rs6ns6l Vs6ns6l provided, the inverting input of amplifier 304 by sensing the voltage generated across the resistor Rs6ns62 V e2 should be provided. 感应电阻Rs6ns6l和Rs6ns62可具有相同的值,以使电流平衡电路能够将感应电压和Vsmse2保持在对应参考电压水平的相同水平。 Rs6ns6l Rs6ns62 sense resistor and may have the same value, so that the current balancing circuit and the induced voltage can be maintained at the same level Vsmse2 corresponding to the reference voltage level.

[0045] 具体地讲,放大器302的输出产生的电压对应参考电压V,ef和感应电压Vsensel之间的差,而放大器304的输出产生的电压对应Vref和Vs6ns62之间的差。 [0045] Specifically, the output of amplifier 302 produces a voltage corresponding to a difference between the reference voltage V, ef and the induced voltage Vsensel, the voltage output of amplifier 304 generated corresponding to a difference between the Vref and Vs6ns62. 例如,当相应的感应电压Vsense随着对应M0SFET的输出电流的增加而增加到接近V,ef时,相应的放大器302或304 的输出通过降低相应M0SFET 306或308的栅极电压来响应。 For example, when the corresponding induced voltage Vsense increasing with an output current corresponding to M0SFET and increases to approximately V, ef, the output of the respective amplifier 302 or 304 responds by reducing the gate voltage of the respective M0SFET 306 or 308. 降低M0SFET的栅极电压会导致M0SFET电阻的增加,这又会减少M0SFET的输出电流。 M0SFET reduced gate voltage will cause an increase M0SFET resistance, which in turn reduces the output current M0SFET.

[0046] 相应地,图4中电流平衡电路可以在M0SFET 306和308的输出提供相同的电流。 [0046] Accordingly, the current balancing circuit in FIG. 4 may provide the same current at the output M0SFET 306 and 308. 如图2所示,可以通过以太网数据变压器的线圈向以太网电缆16的相应双绞线提供电流平衡电路的输出电流,以在每个双绞线中维持相同的电流。 As shown, the current balancing circuit may be provided to the respective twisted-pair Ethernet cable 16 through the coil 2 Ethernet transformer output current to maintain the same current in each twisted pair. 另外,如图3所示,可以向双绞线内相应的导线提供电流平衡电路的输出电流,以将每根导线中的电流保持在相同水平。 Further, as shown in Figure 3, the current balancing circuit may be provided to the respective output currents of the wires in the twisted pair, each conductor to the current is maintained at the same level.

[0047] 在PoE系统中,如果事先不知道以太网电缆中的总电流,可能连续调节参考电压Vref,以提供PD所需的电流。 [0047] In the PoE system, the total current does not know in advance if an Ethernet cable, may continuously adjust the reference voltage Vref, the current required to provide the PD. 没有所述调整,参考电压可能被设定在过高的水平,使M0SFET 306和308的输出信号增加到过高的值。 Without the adjustment, the reference voltage may be set at a high level so that the output signal M0SFET 306 and 308 is increased to excessively high value. 结果,可能破坏促成电流平衡的相应反馈回路。 As a result, damage may contribute to the current balance of the corresponding feedback loop.

[0048] 例如,可以利用自两个平衡感应电阻供给电流的第三感应电阻来调节参考电压Vref0所有3个感应电阻可以具有相同的值,以使提供的参考电压的水平对应第三感应电阻两端的电压水平的一半。 [0048] For example, the use of two balancing resistor from the third sensing resistor sensing the current supplied to adjust the reference voltage Vref0 all three sense resistor may have the same value, so that the level of the reference voltage corresponding to the provided two third sensing resistor half of the voltage level of the terminal.

[0049] 图5示出本发明的另一个示例性实施例,其中,电流平衡电路使用固定或可调节的参考电压。 [0049] FIG. 5 shows another exemplary embodiment of the present invention, wherein the current balancing circuit using a fixed or an adjustable reference voltage. 具体地讲,图5所示的电流平衡电路包括限流放大器402和平衡放大器404,分别驱动M0SFET 406和408的栅极。 In particular, the current balancing circuit shown in FIG. 5 comprises a limiting amplifier 402 and balance amplifier 404, the gate driver respectively M0SFET 406 and 408. 第一和第二感应电阻Rsensel和Rsense2分别连接到M0SFET 406和408。 The first and second sensing resistor are connected to Rsensel and Rsense2 M0SFET 406 and 408. 感应电阻Rsensel和Rsense2可以具有相同的值,以将流过这些电阻的电流保持在相同水平。 Rsensel Rsense2 sense resistor and may have the same value to the current flowing through the resistor is maintained at the same level.

[0050] 参考电压源410向限流放大器402的非反相输入施加参考电压V,ef。 [0050] The reference voltage source 410 is applied to the reference voltage V, ef to the non-inverting input of the limiting amplifier 402. 例如,参考电压可以设定为= IUMXRsms6l,其中,IUM是预定的限流值。 For example, the reference voltage may be set to = IUMXRsms6l, wherein, the IUM is a predetermined limit value. 限流放大器402的反相输入通过第一感应电阻Rs6ns6l两端形成的电压Vs6ns6l提供。 Current limited voltage Vs6ns6l inverting input of amplifier 402 is formed by the ends of the first sense resistor Rs6ns6l provided. [0051] 因此,限流放大器402的输出产生的电压对应参考电压V,ef和感应电压Vsensel之间的压差。 [0051] Thus, the voltage limiting the output of a corresponding amplifier 402 produces a pressure difference between the voltage V, ef Vsensel induced voltage reference. 当感应电压Vsensel随着M0SFET406的输出电流的增加而增加到接近V,ef时,放大器402的输出通过降低M0SFET406的栅极电压作出响应。 When Vsensel induced voltage increases as the output current increases to approximately M0SFET406 while V, ef, the output of the amplifier 402 responds by reducing the gate voltage of M0SFET406. 降低M0SFET406的栅极电压会导致M0SFET电阻的增加,后者又会降低M0SFET406的输出电流,以将该电流保持在IUM水平。 Reduced gate voltage will cause an increase M0SFET406 M0SFET resistance, which in turn reduce the output current M0SFET406 in order to maintain the current level at the IUM.

[0052] 平衡放大器404将感应电压Vs6ns6l和在感应电阻Rs6ns62两端形成的感应电压Vsense2 作比较,以将感应电压vsense2保持在感应电压Vsensel的水平。 [0052] The balance amplifier 404 and the induced voltage Vs6ns6l Vsense2 induced voltage across the sense resistor is formed Rs6ns62 compared to the induced voltage is maintained at a level vsense2 Vsensel the induced voltage. 结果,M0SFET408的输出电流保持在M0SFET406的输出电流的水平。 As a result, the output current M0SFET408 maintained at a level of output current M0SFET406.

[0053] 相应地,图5中的电流平衡电路可以在它的每个输出提供相同的电流。 [0053] Accordingly, FIG. 5 a current balancing circuit may provide the same current in each of its output. 如图2所示,可以通过以太网数据变压器的线圈向以太网电缆16的相应双绞线提供电流平衡电路的输出电流,以在每个双绞线中保持相同的电流。 As shown, the current balancing circuit may be provided to the respective twisted-pair Ethernet cable 16 through the coil 2 Ethernet transformer output current to maintain the same current in each twisted pair. 另外,如图3所示,可以向双绞线内相应的导线提供电流平衡电路的输出电流,以将每个导线中的电流保持在相同水平。 Further, as shown in Figure 3, the current balancing circuit may be provided to the respective output currents of the wires in the twisted pair to keep the current in each conductor is maintained at the same level.

[0054] 图6示出本发明的另一个示例性实施例,它是图4所示电流平衡电路的增强形式。 [0054] FIG 6 shows another exemplary embodiment of the present invention, which is to enhance the form of a current balance circuit 4 shown in FIG. 在图6的电路中,开关元件501和502控制电流流向磁性元件和PoE端口。 In the circuit of Figure 6, the switching elements 501 and 502 control the current flowing to the magnetic element and the PoE port. 电流感应元件503和504提供与流过它们的电流成比例的输出。 Current sensing element 503 and 504 provide a current flowing through the output thereof proportional. 差分放大器510放大元件503和504的输出,产生一信号与流过相应电流感应元件的电流之间的差成比例。 The differential amplifier 510 amplifies the output elements 503 and 504, a difference between a signal proportional to the current flowing through the respective current sensing element. 因此,该信号表示流过元件501和502的电流的不平衡。 Thus, the signal 501 represents the flow through element 502 and the unbalanced current. 差分放大器505和506将由放大器510生成的不平衡信号与由参考电压源507和508产生的参考电压作比较。 Differential amplifiers 505 and 506 generated by the amplifier 510 for an unbalanced signal with the reference voltage generated by the reference voltage source 507 and 508. 放大器505和506的输出分别控制开关元件501和502,并因此控制流过它们的电流。 The output amplifiers 505 and 506 control the switching elements 501 and 502, and thus the control current flows through them.

[0055] 如果流过元件503的电流大于流过元件504的电流,元件503会产生更强的信号。 [0055] If the element 503 is greater than the current flowing through current flows through the element 503 element 504 will produce a stronger signal. 这导致了放大器510的输出电压增大。 This results in the output voltage of the amplifier 510 is increased. 当放大器510的输出电压高于由参考电压源507生成的参考电压时,放大器505降低它的输出电压,减弱向开关元件501的控制信号,并因此减少流过元件501和503的电流。 When the output voltage of the amplifier 510 is higher than the reference voltage generated by the reference voltage source 507, the amplifier 505 to reduce its output voltage, the switching control signal to attenuate elements 501, and thus elements 501 and 503 to reduce current flow. 这对使得流过电流感应元件503和504的电流恢复到平衡具有理想的效果。 This has the desirable effect that the current sense element 503 and the current 504 flowing through the return to equilibrium.

[0056] 在相反的情况中,通过元件504的电流大于通过元件503的电流,会导致放大器510的输出减少。 [0056] In the opposite case, the current larger than the current through the element 504 through element 503, can cause the output of amplifier 510 is reduced. 当输出下降到低于由参考电压源508产生的参考电压时,放大器506会降低它的输出,减弱至开关502的控制信号,由此减少了流过元件502和504的电流,这使得电流感应元件503和504中的电流恢复到平衡。 When the output falls below the reference voltage generated by the reference voltage source 508, the amplifier 506 reduces its output, a control signal to attenuate the switch 502, thereby reducing the current flowing through the elements 502 and 504, which makes the current sensing elements 503 and 504 are restored to the current balance.

[0057] 由图6中电路提供电流的PD,表示未知的负载。 [0057] The current provided by the circuit in FIG. 6 PD, indicating an unknown load. PD的电流提取可以迅速变化,并且PD可以出现阻抗特征,如电感和负电阻,这可能容易造成图6的电路发生振荡。 PD current extraction may vary rapidly, the impedance characteristics and the PD can occur, such as the inductance and negative resistance, which could easily lead to the occurrence of an oscillation circuit 6 of FIG. 谨慎选择由电源507和508生成的参考电压可以避免振荡。 Oscillation can be avoided by the careful selection of reference voltage supply 507 and 508 is generated. 如果选择由电源507和508产生的参考电压,使得每次只有一个放大器505,506在闭合的反馈回路工作,它们就不会都参与小信号振荡。 If the selection reference voltage generated by the power supply 507 and 508, so that only one amplifier 505, 506 work in a closed feedback loop, they will not participate small signal oscillation. 这一旦实现,就可以通过传统方式补偿所述电路。 This once achieved, can be compensated by the conventional circuit.

[0058] 为了使放大器505处于闭合的反馈回路,放大器510的输出必须高于参考电压源507的输出。 [0058] In order to make the amplifier 505 in a closed feedback loop, the output of amplifier 510 must be greater than the reference voltage source 507 output. 放大器506只有在放大器510的输出低于参考电压源508的输出时才会处于闭合的反馈回路。 It will be in a closed loop feedback amplifier 506 only when the output of amplifier 510 is lower than the reference voltage source 508 output. 因此,如果选择参考电压源507的输出高于参考电压源508的输出,每次放大器505,506中只能有一个处于闭合的反馈回路。 Thus, if the selected output reference voltage source 507 is higher than the reference voltage source 508 the output of each amplifier 505, 506 in only one in a closed feedback loop.

[0059] 对于一对比较器,如放大器505和506使用不同的参考值的方法披露于转让给Linear Technology Corporation(凌特公司),本申请的受让人的美国专利6,166,527中, 并且该文献在此被结合入本文。 [0059] For a pair of comparators, such as amplifiers 505 and 506 use different methods are disclosed in the reference value assigned to Linear Technology Corporation (Linear Technology Corporation), U.S. Patent 6,166,527 the assignee of the present application, and which is hereby incorporated herein by reference. 如美国专利6,166,527的图7和图8A所示,通过如本申请的图6所示,使用两个单独的参考信号来驱动放大器505和506,或者使用相同的参考值并在反馈给两者的信号中引入偏差,可能获得相同的效果。 U.S. Patent No. 6,166,527 in FIGS. 7 and 8A, the present application as shown in Figure 6, two separate amplifier to drive the reference signals 505 and 506, or use the same reference and feedback introducing a deviation of the two signals, the same effect may be obtained.

[0060] 以上说明解释和披露了本发明的各个方面。 [0060] The above description explained and disclosed in various aspects of the invention. 另外,所示出和披露的内容仅仅是优选实施例,但正如上文所提到的,应当理解,本发明能够使用各种其他组合,改进,和环境, 并且能够在本文所表述的发明构思范围内进行改变或改进,与上述教导,和/或相关领域的技能或知识匹配。 In addition, it is shown and disclosure of preferred embodiments only, but as mentioned above, it should be understood that the present invention is capable of use in various other combinations, modifications, and environments and concepts in the invention herein can be expressed in changes or modifications within the scope of the above teachings and / or skill or knowledge of the relevant art matching.

[0061] 上述实施例还可用于解释已知用于实施本发明的最佳方式,并且使得本领域技术人员能够以上述或其他实施例的形式利用,并且根据本发明的具体应用或用途的要求进行各种改进。 [0061] The above embodiments may also be used to explain the best mode known for practicing the invention, and that those skilled in the art to the above embodiments or other forms utilized in, and depending on the particular applications or uses of the present invention requires various improvements.

[0062] 因此,本说明书不试图将本发明局限于本文所披露的形式。 [0062] Accordingly, this description is not intended to limit the invention to the form disclosed herein. 另外,希望将所附权利要求书理解成包括可选实施例。 Further, it is desirable that the appended claims be understood to include alternative embodiments.

Claims (25)

  1. 一种通过通信电缆供电的系统,所述通信电缆具有至少第一和第二对导线,包括:供电设备,用于通过所述通信电缆向用电设备供电,和电力分配电路,用于控制所述通信电缆的导线之间的电力分配,以便在第一对导线和第二对导线之间提供电力平衡。 One kind of power supply system via a communication cable, said communication cable having at least a first and second pair of conductors, comprising: a power supply apparatus, via said communication cable to power electrical equipment, and power distribution circuitry for controlling the the power distribution between the wires of said communication cable so as to provide a power balance between the first pair of conductors and a second pair of conductors.
  2. 2.根据权利要求1所述的系统,其中,所述供电设备被设置为通过以太网电缆供电。 2. The system according to claim 1, wherein said power supply apparatus is arranged to power over Ethernet cabling.
  3. 3.根据权利要求1所述的系统,其中,所述用于控制所述通信电缆的导线之间的电力分配是控制所述通信电缆的导线之间的电流分配。 3. The system according to claim 1, wherein the means for controlling the power distribution between the wires of the communication cable is the control current sharing between the communication cable conductors.
  4. 4.根据权利要求3所述的系统,其中,所述电流分配是提供所述通信电缆的导线之间的电流平衡。 4. The system of claim 3, wherein the current distribution is balanced between the current supply of said communication cable conductors.
  5. 5.根据权利要求1所述的系统,其中,所述用于控制所述通信电缆的导线之间的电力分配是控制第一对导线和第二对导线之间的电流分配。 5. The system according to claim 1, wherein the means for controlling the power distribution between the wires of the communication cable is the control current sharing between the first pair of conductors and a second pair of conductors.
  6. 6.根据权利要求5所述的系统,其中,所述电流分配是提供第一对导线和第二对导线之间的电流平衡。 6. The system according to claim 5, wherein the current distribution to provide a balance between a current lead and the second wire pair of a first pair.
  7. 7.根据权利要求1所述的系统,其中,所述电力分配电路包括用于提供参考电压的参考电路;第一和第二感应电阻;和第一和第二运算放大器,用于分别将参考电压和第一和第二感应电阻两端的第一和第二感应电压作比较。 7. The system according to claim 1, wherein the power distribution circuitry comprises a reference circuit for providing a reference voltage; first and second sense resistor; and a first and second operational amplifiers, respectively, for the reference comparing the first and second voltages and the first and second sensing induced voltage across the resistor.
  8. 8.根据权利要求7所述的系统,其中,所述电力分配电路还包括第一和第二驱动元件, 分别接至第一和第二运算放大器的输出,用于控制电流值。 8. The system of claim 7, wherein said power distribution circuit further comprises a first and second drive elements, respectively connected to outputs of the first and second operational amplifiers for controlling current values.
  9. 9.根据权利要求8所述的系统,其中,第一和第二驱动元件中的每一个包括一个或多个M0SFET晶体管。 9. The system of claim 8, wherein each of the first and the second drive element comprises one or more transistors M0SFET.
  10. 10.根据权利要求1所述的系统,其中,所述电力分配电路包括用于提供参考电压的参考电路;第一感应电阻;和限流放大器,用于将参考电压和第一感应电阻两端的第一感应电压作比较,以根据参考电压限制电流值。 10. The system according to claim 1, wherein, with reference to the power distribution circuit comprises a circuit for providing a reference voltage; a first sense resistor; and a limiting amplifier for the reference voltage and the first sensing resistor ends comparing the first sensing voltage to limit the current value according to the reference voltage.
  11. 11.根据权利要求10所述的系统,其中,所述电力分配电路还包括第二感应电阻;和平衡放大器,用于将第二感应电阻两端的第二感应电压和第一感应电压作比较,以在限流放大器和平衡放大器的输出电流值之间提供平衡。 11. The system of claim 10, wherein the power distribution circuit further comprises a second sensing resistor; and a balanced amplifier for sensing a second voltage across the second sensing resistor and the first sensing voltage is compared, to provide a balance between the output current limit amplifier and the balance amplifier.
  12. 12.根据权利要求11所述的系统,其中,所述电力分配电路还包括第一和第二驱动元件,分别接至限流放大器和平衡放大器的输出,用于控制电流值。 12. The system according to claim 11, wherein the power distribution circuit further comprises a first and second driving elements respectively connected to the balanced amplifier and the limiting amplifier output, for controlling the current value.
  13. 13.根据权利要求1所述的系统,其中,所述电力分配电路包括一对电流感应元件和第一差分放大器,用于产生一信号,表示由电流感应元件产生的信号之间的差异。 13. The system according to claim 1, wherein the power distribution circuit includes a current sensing element, and a first differential amplifier, for generating a signal representing the difference between the signals produced by the current sensing element.
  14. 14.根据权利要求13所述的系统,其中,所述电力分配电路还包括第二差分放大器和第三差分放大器,各自具有用于接收第一差分放大器输出的第一输入,和用于接收相应参考值的第二输入,提供给第二差分放大器的参考值不同于提供给第三差分放大器的参考值。 14. The system according to claim 13, wherein the power distribution circuit further comprises a third differential amplifier and a second differential amplifier, each having a first input for receiving a first differential amplifier output, and means for receiving a respective a second input the reference value, the reference value to the reference value differs from the second differential amplifier to the third differential amplifier.
  15. 15.根据权利要求14所述的系统,其中,所述电力分配电路还包括第一和第二驱动元件,分别接至第二和第三差分放大器的输出,用于控制电流值。 15. The system according to claim 14, wherein the power distribution circuit further comprises a first and second driving elements respectively connected to the output of the second and third differential amplifier for controlling the current value.
  16. 16.根据权利要求1所述的系统,还包括用于将供电设备接至通信电缆的变压器,所述变压器具有对应通信电缆中同一个导线对中的第一导线的第一线圈,和对应通信电缆中同一个导线对中的第二导线的第二线圈。 16. The system according to claim 1, further comprising a power supply apparatus for a communication cable connected to the transformer, said transformer having a first coil corresponding to a communication cable of the first wire, and communicate with a corresponding one of the wires cable conductor with a second coil pair of the second lead.
  17. 17.根据权利要求16所述的系统,还包括设置在第一线圈和第二线圈之间的电容元件,以防第一和第二线圈之间的DC连接。 17. The system according to claim 16, further comprising a capacitance element disposed between the first coil and the second coil, to prevent DC between the first and second coil connection.
  18. 18.根据权利要求1所述的系统,其中电力分配电路被设置用于使第一对导线中的电流和与第二对导线中的电流和平衡。 18. The system according to claim 1, wherein the power distribution circuit is provided for the current and the current balance and a second pair of conductors in a first conductor pair.
  19. 19. 一种通过具有至少第一和第二对导线的通信电缆供电的方法,包括以下步骤:通过所述通信电缆供电,和控制所述通信电缆的导线之间的电力分配,以便在第一对导线和第二对导线之间提供电力平衡。 19. A method for communicating through a cable having at least a pair of first and second power supply conductors, comprising the steps of: a power distribution between the power supply through the communication cable, said communication cable and control wires, so that the first providing power balance between the wire and the second pair of conductors.
  20. 20.根据权利要求19所述的方法,其中,通过以太网电缆供电。 20. The method according to claim 19, wherein the power over Ethernet cabling.
  21. 21.根据权利要求19所述的方法,其中,所述控制电力分配的步骤包括在所述通信电缆的第一对导线和第二对导线之间提供电流平衡的步骤。 Step 21. A method according to claim 19, wherein said power distribution control comprises the step of providing a current balance between the first pair of conductors of the communication cable and a second pair of conductors.
  22. 22.根据权利要求19所述的方法,其中控制电力分配的步骤包括使第一对导线中的电流和与第二对导线中的电流和平衡。 22. The method of claim 19, wherein the step of controlling power distribution includes the current and the current balance and a second pair of conductors in a first conductor pair.
  23. 23. 一种局域网,包括:至少一对网络节点,网络集线器,和通信电缆,具有至少第一对和第二对导线用于将所述网络节点连接到网络集线器,以提供数据通信,所述网络集线器具有供电设备,用于通过通信电缆向负载供电,所述局域网包括电力分配电路,用于控制通信电缆的导线之间的电力分配,以便在第一对导线和第二对导线之间提供电力平衡。 23. A local area network comprising: at least a pair of network nodes, a network hub, and communication cables, having at least a first and second pair of wires for connecting the network nodes to the network hub to provide data communications, the the network hub having a power supply device for supplying the load, the local area network through a communication cable including a power distribution circuit for controlling the power distribution between the wires of a communication cable so as to provide between the first pair of conductors and the second pair of conductors power balance.
  24. 24.根据权利要求23所述的局域网,其中,所述用于控制通信电缆的导线之间的电力分配是控制第一对导线和第二对导线之间的电流分配。 24. A local area network according to claim 23, wherein the means for controlling communication between the power distribution cable conductors are assigned to control a current between the first pair of conductors and a second pair of conductors.
  25. 25.根据权利要求23所述的局域网,其中电力分配电路被设置用于使第一对导线中的电流和与第二对导线中的电流和平衡。 25. A local area network according to claim 23, wherein the power distribution circuit is provided for the current and the current balance and a second pair of conductors in a first conductor pair. 3 3
CN 200680003199 2005-01-25 2006-01-23 System, method and LAN for controlling power distribution among multiple wires of communication cables CN101112043B (en)

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US64650905P true 2005-01-25 2005-01-25
US60/646,509 2005-01-25
US11/334,733 US7827418B2 (en) 2005-01-25 2006-01-19 Controlling power distribution among multiple wires in communication cable
US11/334,733 2006-01-19
PCT/US2006/002241 WO2006081166A2 (en) 2005-01-25 2006-01-23 Controlling power distribution among multiple wires in communication cable

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CN200680005472.XA CN101124775B (en) 2005-01-25 2006-01-09 Dual-mode detection of powered device in power over Ethernet system
CN 200680009350 CN101156355B (en) 2005-01-25 2006-01-09 Detecting legacy powered device in power over Ethernet system
CN 200680003192 CN101112042B (en) 2005-01-25 2006-01-09 Distinguishing network interface card from short circuit condition in power over Ethernet system
CN 200680009349 CN101147357B (en) 2005-01-25 2006-01-09 High-power foldback mechanism in system for providing power over communication link
CN 200680005463 CN101124771A (en) 2005-01-25 2006-01-09 Power sourcing equipment having auto-zero circuit for determining and controlling output current
CN 200680003193 CN101129019A (en) 2005-01-25 2006-01-13 Combination of high-side and low-side current sensing in system for providing power over communication link
CN200680003200.6A CN101116285B (en) 2005-01-25 2006-01-13 System, method and regional network with electricity provided by communication link
CN 200680009342 CN101147355B (en) 2005-01-25 2006-01-13 Adjusting current limit thresholds based on power requirement of powered device in system for providing power over communication link
CN 200680005471 CN101124774A (en) 2005-01-25 2006-01-19 Power using delivery to power supply device between detection and classification mode
CN 200680005470 CN101124773A (en) 2005-01-25 2006-01-19 Providing data communication between power supply device and powered device in system for supplying power over communication link
CN 200680003199 CN101112043B (en) 2005-01-25 2006-01-23 System, method and LAN for controlling power distribution among multiple wires of communication cables
CN 200680005469 CN101124772B (en) 2005-01-25 2006-01-23 System for providing power over communication cable having mechanism for determining resistance of communication cable
CN 200680009343 CN101147356A (en) 2005-01-25 2006-01-24 Supplying power over four pairs of conductors in communication cable

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CN 200680009350 CN101156355B (en) 2005-01-25 2006-01-09 Detecting legacy powered device in power over Ethernet system
CN 200680003192 CN101112042B (en) 2005-01-25 2006-01-09 Distinguishing network interface card from short circuit condition in power over Ethernet system
CN 200680009349 CN101147357B (en) 2005-01-25 2006-01-09 High-power foldback mechanism in system for providing power over communication link
CN 200680005463 CN101124771A (en) 2005-01-25 2006-01-09 Power sourcing equipment having auto-zero circuit for determining and controlling output current
CN 200680003193 CN101129019A (en) 2005-01-25 2006-01-13 Combination of high-side and low-side current sensing in system for providing power over communication link
CN200680003200.6A CN101116285B (en) 2005-01-25 2006-01-13 System, method and regional network with electricity provided by communication link
CN 200680009342 CN101147355B (en) 2005-01-25 2006-01-13 Adjusting current limit thresholds based on power requirement of powered device in system for providing power over communication link
CN 200680005471 CN101124774A (en) 2005-01-25 2006-01-19 Power using delivery to power supply device between detection and classification mode
CN 200680005470 CN101124773A (en) 2005-01-25 2006-01-19 Providing data communication between power supply device and powered device in system for supplying power over communication link

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Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101252448B (en) 2008-03-31 2010-12-22 杭州华三通信技术有限公司 Method and system for detecting current failure of power receiving equipment as well as power supply equipment
CN101625389B (en) 2009-08-06 2011-12-28 中国电力科学研究院 Power System Stability analysis method considering characteristics of the load change
CN102111019B (en) * 2009-12-25 2014-01-29 智邦科技股份有限公司 Network electricity-taking device and electricity-taking method thereof
US8797011B2 (en) * 2010-01-08 2014-08-05 General Electric Company Variable current limiter for regulator
CN102075331B (en) * 2010-11-04 2014-12-31 中兴通讯股份有限公司 Ethernet power supply end equipment as well as system and method thereof for realizing power supply
CN102025511A (en) * 2010-12-08 2011-04-20 中兴通讯股份有限公司 Method and device for supplying power to terminal equipment
EP2942902B1 (en) 2011-06-09 2017-11-15 CommScope Technologies LLC Distributed antenna system using power-over-ethernet
US9639135B2 (en) 2011-07-18 2017-05-02 Hewlett-Packard Development Company, L.P. Power consumption limit associated with power over ethernet (PoE) computing system
US8823402B2 (en) * 2011-11-23 2014-09-02 Broadcom Corporation Cable resistance determination in high-power PoE networks
CN103688487A (en) * 2011-12-15 2014-03-26 华为技术有限公司 Power supply method, current sharing module and power supply system
CN103595542B (en) * 2012-08-13 2017-02-15 中国电信股份有限公司 A power supply terminal device, a power supply system and a power supply method
RU2015111267A (en) * 2012-08-29 2016-10-20 Конинклейке Филипс Н.В. Method and apparatus for multiplexed power and data supply through two-wired data transfer cable
EP2712083B1 (en) * 2012-09-20 2015-02-25 Infineon Technologies AG Semiconductor device including short-circuit protection depending on an under-voltage detection
US20140136874A1 (en) * 2012-11-15 2014-05-15 Broadcom Corporation Low latency discovery for power over ethernet
CN103067182B (en) * 2012-12-26 2015-09-23 上海华为技术有限公司 A kind of method of constrained feed and power supply unit
CN104062996B (en) * 2013-03-20 2016-12-28 鸿富锦精密工业(深圳)有限公司 Current regulating circuit, POE system and method
CN104247330B (en) * 2013-04-17 2017-09-22 柏思科技有限公司 Method and system for supplying and receiving POE
TW201448519A (en) 2013-06-11 2014-12-16 Hon Hai Prec Ind Co Ltd Power supply redundant circuit, power over Ethernet system and method
CN104243175B (en) * 2013-06-11 2017-07-28 鸿富锦精密工业(深圳)有限公司 Power backup circuit, POE system and method
CN104348631B (en) * 2013-07-26 2018-09-18 明泰科技股份有限公司 The selection method of power receiving device, power supply system and operation mode
US10411504B2 (en) 2013-07-31 2019-09-10 Texas Instruments Incorporated System and method for controlling power delivered to a powered device through a communication cable
WO2015018656A1 (en) * 2013-08-08 2015-02-12 Koninklijke Philips N.V. Powered device and power distribution system comprising the powered device
CN104426707B (en) * 2013-08-20 2018-10-19 华为技术有限公司 Detect the method and power supply unit of Power over Ethernet
US9897981B2 (en) * 2013-10-01 2018-02-20 Linear Technology Corporation Detection and classification scheme for power over ethernet system
TWI544761B (en) 2014-06-05 2016-08-01 智邦科技股份有限公司 Power source equipment and power supply method thereof
WO2016005256A1 (en) * 2014-07-08 2016-01-14 Koninklijke Philips N.V. Powered device and power distribution system comprising the powered device
WO2016049841A1 (en) * 2014-09-30 2016-04-07 Siemens Schweiz Ag Thermostat having over current management
US9967104B2 (en) * 2014-11-19 2018-05-08 Linear Technology Corporation Detecting ground isolation fault in ethernet PoDL system
US10090666B2 (en) * 2014-12-01 2018-10-02 Linear Technology Corporation Circuit architectures for protecting against PoDL wire faults
EP3259880B1 (en) * 2015-02-17 2018-09-26 Microsemi P.O.E. Ltd. Poe power utilization arrangement and method
US9973343B2 (en) 2015-04-09 2018-05-15 Sercomm Corporation Power supply system, power sourcing equipment, and ethernet Y cable
CN104901813B (en) * 2015-04-09 2018-05-22 中磊电子(苏州)有限公司 For electric installation and electric power system
CN104991143B (en) * 2015-07-10 2018-01-23 博为科技有限公司 Power apparatus detection circuit, the method and power apparatus for detecting power apparatus
CN105048439B (en) * 2015-08-10 2018-10-12 福建星网锐捷网络有限公司 A kind of method for controlling power supply and device
CN106936598A (en) * 2015-12-31 2017-07-07 华为技术有限公司 POE method and power supply unit and power receiving equipment
CN106026056A (en) * 2016-05-18 2016-10-12 浙江大华技术股份有限公司 Anti-impact circuit for power supply equipment, power supply equipment, and Ethernet power supply system
CN108111316A (en) * 2016-11-25 2018-06-01 新华三技术有限公司 A kind of PSE
CN107147503A (en) * 2017-04-28 2017-09-08 华为技术有限公司 Power receiving equipment and POE system
TWI649982B (en) * 2017-12-08 2019-02-01 和碩聯合科技股份有限公司 Ethernet powered device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0981227A2 (en) 1998-08-19 2000-02-23 Oki Electric Industry Co., Ltd. Power feeding system for telephone terminal in LAN
CN1364026A (en) 2001-01-08 2002-08-14 阿尔卡塔尔公司 Device for providing distance power feed in long distance communication network
CN1157022C (en) 1999-01-12 2004-07-07 袍尔得辛有限公司 Structured calbing system improvement
CN1540858A (en) 2003-04-23 2004-10-27 罗姆股份有限公司 Audio Signal amplifier circuit and electrnic appts. having same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4792745A (en) 1987-10-28 1988-12-20 Linear Technology Corporation Dual transistor output stage
WO1998013999A2 (en) 1996-09-26 1998-04-02 Philips Electronics N.V. Power supply circuit, telecommunication device and method for multiple dc slope power management
DE60043836D1 (en) 1999-11-04 2010-04-01 Alcatel Lucent Method for the remote supply of a terminal in a local area network
US6778921B2 (en) 2001-04-06 2004-08-17 Eni Technology, Inc. Modular architecture for industrial power delivery system
CN1202639C (en) * 2001-10-22 2005-05-18 浙江中控技术有限公司 Ethernet hub able to implement redundent power supply of network

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0981227A2 (en) 1998-08-19 2000-02-23 Oki Electric Industry Co., Ltd. Power feeding system for telephone terminal in LAN
CN1157022C (en) 1999-01-12 2004-07-07 袍尔得辛有限公司 Structured calbing system improvement
CN1364026A (en) 2001-01-08 2002-08-14 阿尔卡塔尔公司 Device for providing distance power feed in long distance communication network
CN1540858A (en) 2003-04-23 2004-10-27 罗姆股份有限公司 Audio Signal amplifier circuit and electrnic appts. having same

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CN101124775B (en) 2014-11-26
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CN101129019A (en) 2008-02-20
CN101156355B (en) 2011-05-25

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