WO2022016818A1 - Ethernet double-interface and direct-current redundant power supply system - Google Patents

Ethernet double-interface and direct-current redundant power supply system Download PDF

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Publication number
WO2022016818A1
WO2022016818A1 PCT/CN2020/141372 CN2020141372W WO2022016818A1 WO 2022016818 A1 WO2022016818 A1 WO 2022016818A1 CN 2020141372 W CN2020141372 W CN 2020141372W WO 2022016818 A1 WO2022016818 A1 WO 2022016818A1
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Prior art keywords
power supply
ethernet
output
supply system
interface
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PCT/CN2020/141372
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French (fr)
Chinese (zh)
Inventor
黄兆锦
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威创集团股份有限公司
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Publication of WO2022016818A1 publication Critical patent/WO2022016818A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/10—Current supply arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/08—Three-wire systems; Systems having more than three wires
    • H02J1/084—Three-wire systems; Systems having more than three wires for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
    • H02J1/086—Three-wire systems; Systems having more than three wires for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load or loads and source or sources when the main path fails
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources

Definitions

  • the invention relates to the technical field of power supply, in particular to an Ethernet dual network port and a DC redundant power supply system.
  • PoE Power over Ethernet, Power over Ethernet
  • PoE+ is a higher version of the PoE technology, most compliant with the 802.3at standard, and can output greater power.
  • PoE/PoE+ has been widely used in Ethernet-based terminals, nodes and relay equipment (network cameras, distributed video boxes, network audio equipment, etc.).
  • the power supply of traditional terminal equipment is mostly DC power supply or PoE single network port power supply.
  • the power supply interface is single, and once the power port is powered off, the terminal will not work.
  • the invention provides an Ethernet dual network port and DC redundant power supply system, which is used to solve the problem that traditional terminal equipment power supply is mostly DC power supply or PoE single network port power supply, the power supply interface is single, and once the power port is powered off, the terminal will Technical issues not working.
  • the present invention provides an Ethernet dual network port and DC redundant power supply system, comprising:
  • DC power connector first Ethernet interface, second Ethernet interface, first rectifier bridge stack, second rectifier bridge stack, common mode inductor, conversion module, field effect transistor and isolation diode;
  • the field effect transistor has a source pole, gate and drain;
  • the isolation diode includes a first isolation diode and a second isolation diode;
  • the first Ethernet interface has a first DC power output terminal, and the first DC power output terminal is connected to the input terminal of the first rectifier bridge stack;
  • the second Ethernet interface has a first DC power output terminal, and the second DC power output terminal is connected to the input terminal of the second rectifier bridge stack;
  • the output end of the first rectifier bridge stack and the output end of the second rectifier bridge stack are respectively connected with the input end of the common mode inductor;
  • the output end of the common mode inductor is connected to the input end of the conversion module
  • the output end of the conversion module is connected to the source of the field effect transistor
  • the output end of the DC power connector is connected to the gate of the field effect transistor and one end of the first isolation diode;
  • the drain of the field effect transistor is connected to one end of the second isolation diode.
  • One end is connected to the output end of the first DC power supply, and the other end is connected to a first transient suppression diode with a preset ground line.
  • One end is connected to the output end of the second DC power supply, and the other end is connected to the second transient suppression diode of the preset ground line.
  • the input end of the common mode inductor includes a positive signal input interface and a negative signal input interface;
  • the Ethernet dual network port and the DC redundant power supply system further include:
  • a third TVS diode whose one end is connected to the positive signal input interface and the other end is connected to the negative signal input interface.
  • the first Ethernet interface further has a first network signal output port.
  • the second Ethernet interface further has a second network signal output port.
  • a DC power supply connected to the input end of the DC power supply connector.
  • a first switch connected to the input end of the first Ethernet interface through a first Ethernet cable
  • a second switch connected to the input end of the second Ethernet interface through a second Ethernet cable.
  • One end is connected to the first network signal output port, and the other end is connected to the first anti-static transient suppression diode array with a preset ground line.
  • One end is connected to the second network signal output port, and the other end is connected to a second anti-static transient suppression diode array with a preset ground line.
  • the present invention controls the gate of the field effect transistor through the DC power supply connector to control the turn-on and turn-off of the output power of the first Ethernet interface and the second Ethernet interface If the power supply is disconnected, only one power supply can be supplied at the same time, and the power output from the DC power connector is the highest priority. At the same time, the drain of the field effect transistor and the output end of the DC power connector are isolated by an isolation diode, which prevents the backflow phenomenon between the output power of the DC power connector and the output power of the field effect tube, forming a relationship of mutual redundancy backup .
  • FIG. 1 is a schematic structural diagram of an Ethernet dual network port and DC redundant power supply system provided by an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of an Ethernet dual network port and DC redundant power supply system according to another embodiment of the present invention.
  • the embodiment of the present invention provides an Ethernet dual network port and DC redundant power supply system, which is used to solve the problem that traditional terminal equipment power supply is mostly DC power supply or PoE single network port power supply, the power supply interface is single, and once the power port is powered off, Terminal will not work for technical issues.
  • the invention is based on IEEE 802.3at standard technology (compatible with 802.3af standard), and can be applied to various Ethernet terminals, nodes or relay equipment, such as distributed audio and video transmission systems, network cameras, and photoelectric conversion equipment, especially in multi-network ports.
  • the box-type terminal products have strong practicability.
  • FIG. 1 is a schematic structural diagram of an Ethernet dual network port and DC redundant power supply system according to an embodiment of the present invention.
  • the present invention provides an Ethernet dual network port and DC redundant power supply system, comprising:
  • DC power connector 101 first Ethernet interface 102, second Ethernet interface 103, first rectifier bridge stack 104, second rectifier bridge stack 105, common mode inductor 106, conversion module 107, FET 108 and isolation diode 109;
  • the field effect transistor 108 has a source, a gate and a drain;
  • the isolation diode 109 includes a first isolation diode and a second isolation diode;
  • the first Ethernet interface 102 has a first DC power output terminal, and the first DC power output terminal is connected to the input terminal of the first rectifier bridge stack 104;
  • the second Ethernet interface 103 has a first DC power output terminal, and the second DC power output terminal is connected to the input terminal of the second rectifier bridge stack 105;
  • the output end of the first rectifier bridge stack 104 and the output end of the second rectifier bridge stack 105 are respectively connected to the input end of the common mode inductor 106;
  • the output end of the common mode inductor 106 is connected to the input end of the conversion module 107;
  • the output end of the conversion module 107 is connected to the source of the field effect transistor 108;
  • the output end of the DC power connector 101 is connected to the gate of the field effect transistor 108 and one end of the isolation diode 109;
  • the drain of the field effect transistor 108 is connected to the other end of the isolation diode 109 .
  • Ethernet interface is the port of the Ethernet network data connection.
  • Ethernet is the most widely used local area network communication method and is also a protocol.
  • the rectifier bridge stack is a rectifier device composed of two or four diodes. There are three types of half bridges, full bridges and three-phase bridges. Half bridges have two types: positive half bridges and negative half bridges.
  • Common mode inductor 106 also called common mode choke coil, is often used to filter common mode electromagnetic interference signals.
  • Common mode interference refers to the interference caused by the potential difference between the two traces and the ground wire.
  • the common mode inductance also plays the role of filtering, which is used to restrain the electromagnetic wave generated by the high-speed signal line from radiating and radiating outward.
  • the conversion module 107 of the present invention is a voltage converter that outputs a fixed voltage after converting the input voltage.
  • the FET 108 is a semiconductor device that uses the electric field effect of the control input loop to control the output loop current.
  • the field effect transistor 108 used in the system is a P-channel field effect transistor.
  • the conduction between the source and drain can be controlled by controlling the voltage on the gate.
  • the isolation diode 109 uses the unidirectional conduction principle of the diode to isolate the conduction of the voltage in a certain direction.
  • the forward conduction voltage of the isolation diode is between 0.6 and 0.8V.
  • the input end of the DC power connector 101 is connected to the DC power supply to provide a DC power supply for the system.
  • the first DC power output terminal of the first Ethernet interface 102 and the second DC power output terminal of the second Ethernet interface 103 output a power supply between 44 and 57 VDC respectively.
  • the first Ethernet interface 102 The typical value of the power output from the second Ethernet port 103 is 48VDC.
  • the first Ethernet interface 102 is connected to the input end of the first rectifier bridge stack 104 through the output end of the first DC power supply.
  • the first Ethernet interface 102 is provided with a transformer, and the power supply output by the center tap of the transformer has two positive power supply signals VIN+ and two negative power supply signals VIN-, the use of the first rectifier bridge stack 104 can realize the positive and negative separation of the above-mentioned power supply signals, Prevent backflow and positive and negative crosstalk.
  • the second Ethernet interface 103 is connected to the input end of the second rectifier bridge stack 105 through the second DC power output end, and the positive and negative separation of the output power signal of the first Ethernet interface is realized through the second rectifier bridge stack 105, Prevent backflow and positive and negative crosstalk.
  • the output end of the first rectifier bridge stack 104 and the output end of the second rectifier bridge stack 105 are respectively connected to the input end of the common mode inductor 106 , and the common mode inductor 106 can filter the gap between the first rectifier bridge stack 104 and the second rectifier bridge stack 105 . Electromagnetic interference signals generated by common mode.
  • the power signal filtered by the common mode inductor 106 enters the conversion module 107, which can step down the power supply of 44-57VDC to the low-voltage DC power supply required by the load, thereby stabilizing the output voltage of 12.00V-12.03V and the maximum current of 2.5A. Power supply.
  • the conversion module 107 may be a PoE+DC-DC conversion module, and the output power source is a PoE DC power source.
  • the PoE DC power output from the conversion module 107 is transmitted to the FET 108 through the source of the FET 108.
  • the source and the drain are in a conducting state, and the The drain can send PoE DC power out through the isolation diode 109 .
  • the gate of the field effect transistor 108 has an external voltage, the conduction state of the source and the drain is blocked.
  • the DC power output from the DC power connector 101 provides a positive voltage for the gate of the field effect transistor 108 to control whether to output the PoE DC power. Meanwhile, when the DC power connector 101 outputs DC power, the DC power connector 101 transmits the DC power to the outside through the isolation diode 109 .
  • the gate voltage of the P-channel FET is greater than the source voltage, the P-channel FET is in an off state, the PoE DC power supply is turned off, and the DC power supply is used for power supply; when the gate has no DC power When the power supply is input, the gate voltage of the P-channel FET is less than the source voltage, the P-channel FET is in a conducting state, the PoE DC power supply is turned on, and the PoE DC power supply is used for power supply.
  • the DC power output by the DC power connector 101 can block the conduction of the PoE DC power. Therefore, the DC power output by the DC power connector 101 has a higher priority than the PoE DC power. At the same time, between the DC power supply and the PoE DC power supply, only one power supply can supply power to the outside at the same time.
  • an isolation diode 109 may be used to isolate the two power sources.
  • the two power sources are respectively connected to the first isolation diode and the second isolation diode according to the conduction direction. Thereby forming a relationship of mutual redundant backup.
  • the two power supplies input by the first Ethernet interface 102 and the second Ethernet interface 103 are also in a redundant backup relationship, and the first interface successfully negotiated with the PoE+DC-DC conversion module is used as the external power supply input.
  • the PoE+DC-DC conversion module immediately negotiates PoE power supply with another interface, and finally establishes power supply-receiving power with the successfully negotiated Ethernet interface relation.
  • One end is connected to the output end of the first DC power supply, and the other end is connected to a first TVS diode (a first TVS tube) 110 with a predetermined ground line.
  • One end is connected to the output end of the second DC power supply, and the other end is connected to the second TVS diode (second TVS tube) 111 connected to the predetermined ground line.
  • the first TVS diode 110 and the second TVS diode 111 are used to suppress common mode surges.
  • Surge refers to a powerful pulse generated at the moment when the power supply is just turned on. Because the linearity of the circuit itself may be higher than the pulse of the power supply itself; the surge is likely to cause the circuit to burn out in an instant, such as PN junction capacitor breakdown, resistor burnout, etc.
  • the input end of the common mode inductor 106 includes a positive signal input interface and a negative signal input interface
  • the Ethernet dual network port and DC redundant power supply system further includes:
  • a third TVS diode (third TVS tube) 112 having one end connected to the positive signal input interface and the other end connected to the negative signal input interface.
  • the third TVS diode 112 is used to suppress differential mode surges.
  • the first Ethernet interface 102 further has a first network signal output port, and the first network output port is used for outputting the first network signal.
  • the second Ethernet interface 103 also has a second network signal output port for outputting the second network signal.
  • the first network output port is connected to the ground wire through the first anti-static TVS array (first TVS array) 113
  • the second network output port is connected to the ground through the second anti-static TVS array (second TVS array) 114 .
  • the ground wire is connected, and the first ESD TVS diode array 113 and the second ESD TVS diode array 114 are used to prevent external static electricity damage and interference.
  • FIG. 2 is a schematic structural diagram of an Ethernet dual network port and DC redundant power supply system according to another embodiment of the present invention. This includes Part A, which consists of all the modules in Figure 1.
  • system involved in the embodiment of the present invention may further include:
  • a DC power supply 116 connected to the input end of the DC power supply connector 101 through the DC power supply line 115;
  • a first switch 118 connected to the input end of the first Ethernet interface 102 through the first Ethernet cable 117;
  • the second switch 120 is connected to the input end of the second Ethernet interface 103 through the second Ethernet cable 119 .
  • the power supply and signal input sources are a DC power supply 116, a PSE (Power Sourcing Equipment, power supply equipment) switch 118 and a PSE switch 120, which output the reduced DC power supply and network signals.
  • the power of the input power supply and the level of the switch can be selected according to the power requirements of the back-end load circuit.
  • PSE switches are divided into three types according to different power supply standards:
  • IEEE802.3bt (PoE++) switch which can output more than 72 watts of power, and the maximum power available at the receiving end is 71 watts; compatible with IEEE802.3af, IEEE802.3at.
  • the present invention can output a maximum of 12.95 watts of DC power; when the PSE switch is an IEEE802.3at (PoE+) or IEEE802.3bt (PoE++) switch type, the present invention can output a maximum of 12.95 watts of DC power. 25.5W DC power supply.
  • any one of the above switches can be selected as the input power supply; when the power required by the back-end load P When >12.95W and ⁇ 25.50Wh (ie voltage 12V, 1.08A ⁇ current ⁇ 2.125A), IEEE802.3at (PoE+) switch or IEEE802.3bt (PoE++) switch can be selected as input power supply.
  • Ethernet cables require attention: the safe transmission distance of PoE power supply is 100 meters, and the cable grade is all copper network cables of Category 5e (or Category 6).
  • the gate of the field effect transistor 108 is controlled by the DC power connector 101 to control the turn-on and turn-off of the output power of the first Ethernet interface 102 and the second Ethernet interface 103, so that only one power supply can be supplied at the same time, And the power output from the DC power connector 101 has the highest priority.
  • the drain of the FET 108 and the output end of the DC power connector 101 are isolated by the isolation diode 109, which prevents the backflow phenomenon between the output power of the DC power connector 101 and the output power of the FET 108, forming a mutual The relationship of redundant backup.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

Disclosed are an Ethernet double-interface and direct-current redundant power supply system. The system comprises: a direct-current power source connector, a first Ethernet interface, a second Ethernet interface, a first bridge rectifier, a second bridge rectifier, a common mode inductor, a conversion module, a field-effect transistor and an isolating diode, wherein the field-effect transistor has a source electrode, a gate electrode and a drain electrode; and the isolating diode comprises a first isolating diode and a second isolating diode. In the present invention, a gate electrode of a field-effect transistor is controlled by means of a direct-current power source connector, so as to control the turning on and turning off of output power sources of a first Ethernet interface and a second Ethernet interface, such that only one power source supplies power at any one time, and a power source output by the direct-current power source connector is taken as the highest priority. Moreover, a drain electrode of the field-effect transistor is isolated from an output end of the direct-current power source connector by means of an isolating diode, such that the phenomenon of backflow occurring between an output power source of the direct-current power source connector and an output power source of the field-effect transistor is prevented, and a mutual redundant backup relationship is formed.

Description

一种以太网双网口和直流冗余供电系统An Ethernet dual network port and DC redundant power supply system
本申请要求于2020年07月23日提交中国专利局、申请号为202010718217.1、发明名称为“一种以太网双网口和直流冗余供电系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application filed on July 23, 2020 with the application number 202010718217.1 and the title of the invention is "An Ethernet dual network port and DC redundant power supply system", the entire contents of which are approved by Reference is incorporated in this application.
技术领域technical field
本发明涉及供电技术领域，尤其涉及一种以太网双网口和直流冗余供电系统。The invention relates to the technical field of power supply, in particular to an Ethernet dual network port and a DC redundant power supply system.
背景技术Background technique
PoE(Power over Ethernet，以太网供电)供电技术诞生于2003年，遵守802.3af标准，在传输以太网信号的同时给设备供电。PoE+为更高版本的PoE技术，最受802.3at标准，可以输出更大电源功率。目前PoE/PoE+在基于以太网的终端、节点及中继设备(网络摄像机、分布式视频盒子、网络音频设备等)得到了广泛的应用。PoE (Power over Ethernet, Power over Ethernet) power supply technology was born in 2003. It complies with the 802.3af standard and supplies power to devices while transmitting Ethernet signals. PoE+ is a higher version of the PoE technology, most compliant with the 802.3at standard, and can output greater power. At present, PoE/PoE+ has been widely used in Ethernet-based terminals, nodes and relay equipment (network cameras, distributed video boxes, network audio equipment, etc.).
传统的终端设备供电多为直流供电或PoE单网口供电，供电接口单一，且电源端口一旦断电，终端将无法工作。The power supply of traditional terminal equipment is mostly DC power supply or PoE single network port power supply. The power supply interface is single, and once the power port is powered off, the terminal will not work.
发明内容SUMMARY OF THE INVENTION
本发明提供了一种以太网双网口和直流冗余供电系统，用于解决传统的终端设备供电多为直流供电或PoE单网口供电，供电接口单一，且电源端口一旦断电，终端将无法工作的技术问题。The invention provides an Ethernet dual network port and DC redundant power supply system, which is used to solve the problem that traditional terminal equipment power supply is mostly DC power supply or PoE single network port power supply, the power supply interface is single, and once the power port is powered off, the terminal will Technical issues not working.
本发明提供的一种以太网双网口和直流冗余供电系统，包括：The present invention provides an Ethernet dual network port and DC redundant power supply system, comprising:
直流电源连接器，第一以太网接口，第二以太网接口，第一整流桥堆，第二整流桥堆，共模电感，转换模块，场效应管和隔离二极管；所述场效应管具有源极，栅极和漏极；所述隔离二极管包括第一隔离二极管和第二隔离二极管；DC power connector, first Ethernet interface, second Ethernet interface, first rectifier bridge stack, second rectifier bridge stack, common mode inductor, conversion module, field effect transistor and isolation diode; the field effect transistor has a source pole, gate and drain; the isolation diode includes a first isolation diode and a second isolation diode;
所述第一以太网接口具有第一直流电源输出端，所述第一直流电源输出端与所述第一整流桥堆的输入端连接；The first Ethernet interface has a first DC power output terminal, and the first DC power output terminal is connected to the input terminal of the first rectifier bridge stack;
所述第二以太网接口具有第一直流电源输出端，所述第二直流电源输出端与所述第二整流桥堆的输入端连接；The second Ethernet interface has a first DC power output terminal, and the second DC power output terminal is connected to the input terminal of the second rectifier bridge stack;
所述第一整流桥堆的输出端、所述第二整流桥堆的输出端分别与所述共模电感的输入端连接；The output end of the first rectifier bridge stack and the output end of the second rectifier bridge stack are respectively connected with the input end of the common mode inductor;
所述共模电感的输出端与所述转换模块的输入端连接；The output end of the common mode inductor is connected to the input end of the conversion module;
所述转换模块的输出端与所述场效应管的源极连接；The output end of the conversion module is connected to the source of the field effect transistor;
所述直流电源连接器的输出端与所述场效应管的栅极、所述所述第一隔离二极管一端连接；The output end of the DC power connector is connected to the gate of the field effect transistor and one end of the first isolation diode;
所述场效应管的漏极与所述第二隔离二极管一端连接。The drain of the field effect transistor is connected to one end of the second isolation diode.
可选地，还包括：Optionally, also include:
一端与所述第一直流电源输出端连接，另一端与预设接地线连接的第一瞬态抑制二极管。One end is connected to the output end of the first DC power supply, and the other end is connected to a first transient suppression diode with a preset ground line.
可选地，还包括：Optionally, also include:
一端与所述第二直流电源输出端连接，另一端与所述预设接地线连接的第二瞬态抑制二极管。One end is connected to the output end of the second DC power supply, and the other end is connected to the second transient suppression diode of the preset ground line.
可选地，所述共模电感的输入端包括正信号输入接口和负信号输入接口；以太网双网口和直流冗余供电系统还包括：Optionally, the input end of the common mode inductor includes a positive signal input interface and a negative signal input interface; the Ethernet dual network port and the DC redundant power supply system further include:
一端与所述正信号输入接口连接，另一端与所述负信号输入接口连接的第三瞬态抑制二极管。A third TVS diode whose one end is connected to the positive signal input interface and the other end is connected to the negative signal input interface.
可选地，所述第一以太网接口还具有第一网络信号输出端口。Optionally, the first Ethernet interface further has a first network signal output port.
可选地，所述第二以太网接口还具有第二网络信号输出端口。Optionally, the second Ethernet interface further has a second network signal output port.
可选地，还包括：Optionally, also include:
与所述直流电源连接器的输入端连接的直流电源。A DC power supply connected to the input end of the DC power supply connector.
可选地，还包括：Optionally, also include:
通过第一以太网线缆与所述第一以太网接口的输入端连接的第一交换机；a first switch connected to the input end of the first Ethernet interface through a first Ethernet cable;
通过第二以太网线缆与所述第二以太网接口的输入端连接的第二交换机。A second switch connected to the input end of the second Ethernet interface through a second Ethernet cable.
可选地，还包括：Optionally, also include:
一端与所述第一网络信号输出端口连接，另一端与预设接地线连接的 第一防静电瞬态抑制二极管阵列。One end is connected to the first network signal output port, and the other end is connected to the first anti-static transient suppression diode array with a preset ground line.
可选地，还包括：Optionally, also include:
一端与所述第二网络信号输出端口连接，另一端与预设接地线连接的第二防静电瞬态抑制二极管阵列。One end is connected to the second network signal output port, and the other end is connected to a second anti-static transient suppression diode array with a preset ground line.
从以上技术方案可以看出，本发明具有以下优点：本发明通过直流电源连接器控制场效应管的栅极，以控制第一以太网接口和第二以太网接口的输出电源的导通和关断，达到同一时间只有一路电源供电，且以直流电源连接器输出的电源为最高优先级。同时场效应管的漏极和直流电源连接器的输出端通过隔离二极管隔离，防止了直流电源连接器的输出电源和场效应管的输出电源之间出现倒灌现象，形成互为冗余备份的关系。It can be seen from the above technical solutions that the present invention has the following advantages: the present invention controls the gate of the field effect transistor through the DC power supply connector to control the turn-on and turn-off of the output power of the first Ethernet interface and the second Ethernet interface If the power supply is disconnected, only one power supply can be supplied at the same time, and the power output from the DC power connector is the highest priority. At the same time, the drain of the field effect transistor and the output end of the DC power connector are isolated by an isolation diode, which prevents the backflow phenomenon between the output power of the DC power connector and the output power of the field effect tube, forming a relationship of mutual redundancy backup .
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其它的附图。In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.
图1为本发明实施例提供的一种以太网双网口和直流冗余供电系统的结构示意图；1 is a schematic structural diagram of an Ethernet dual network port and DC redundant power supply system provided by an embodiment of the present invention;
图2为本发明另一实施例提供的一种以太网双网口和直流冗余供电系统的结构示意图。FIG. 2 is a schematic structural diagram of an Ethernet dual network port and DC redundant power supply system according to another embodiment of the present invention.
具体实施方式detailed description
本发明实施例提供了一种以太网双网口和直流冗余供电系统，用于解决传统的终端设备供电多为直流供电或PoE单网口供电，供电接口单一，且电源端口一旦断电，终端将无法工作的技术问题。The embodiment of the present invention provides an Ethernet dual network port and DC redundant power supply system, which is used to solve the problem that traditional terminal equipment power supply is mostly DC power supply or PoE single network port power supply, the power supply interface is single, and once the power port is powered off, Terminal will not work for technical issues.
本发明基于IEEE 802.3at标准技术(兼容802.3af标准)，可应用于各类以太网终端、节点或中继设备，如分布式音视频传输系统、网络摄像机、光电转换设备，尤其在多网口的盒子类终端产品具有很强的实用性。The invention is based on IEEE 802.3at standard technology (compatible with 802.3af standard), and can be applied to various Ethernet terminals, nodes or relay equipment, such as distributed audio and video transmission systems, network cameras, and photoelectric conversion equipment, especially in multi-network ports. The box-type terminal products have strong practicability.
为使得本发明的发明目的、特征、优点能够更加的明显和易懂，下面 将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，下面所描述的实施例仅仅是本发明一部分实施例，而非全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
请参阅图1，图1为本发明实施例提供的一种以太网双网口和直流冗余供电系统的结构示意图。Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of an Ethernet dual network port and DC redundant power supply system according to an embodiment of the present invention.
本发明提供的一种以太网双网口和直流冗余供电系统，包括：The present invention provides an Ethernet dual network port and DC redundant power supply system, comprising:
直流电源连接器101，第一以太网接口102，第二以太网接口103，第一整流桥堆104，第二整流桥堆105，共模电感106，转换模块107，场效应管108和隔离二极管109；所述场效应管108具有源极，栅极和漏极；所述隔离二极管109包括第一隔离二极管和第二隔离二极管；DC power connector 101, first Ethernet interface 102, second Ethernet interface 103, first rectifier bridge stack 104, second rectifier bridge stack 105, common mode inductor 106, conversion module 107, FET 108 and isolation diode 109; the field effect transistor 108 has a source, a gate and a drain; the isolation diode 109 includes a first isolation diode and a second isolation diode;
所述第一以太网接口102具有第一直流电源输出端，所述第一直流电源输出端与所述第一整流桥堆104的输入端连接；The first Ethernet interface 102 has a first DC power output terminal, and the first DC power output terminal is connected to the input terminal of the first rectifier bridge stack 104;
所述第二以太网接口103具有第一直流电源输出端，所述第二直流电源输出端与所述第二整流桥堆105的输入端连接；The second Ethernet interface 103 has a first DC power output terminal, and the second DC power output terminal is connected to the input terminal of the second rectifier bridge stack 105;
所述第一整流桥堆104的输出端、所述第二整流桥堆105的输出端分别与所述共模电感106的输入端连接；The output end of the first rectifier bridge stack 104 and the output end of the second rectifier bridge stack 105 are respectively connected to the input end of the common mode inductor 106;
所述共模电感106的输出端与所述转换模块107的输入端连接；The output end of the common mode inductor 106 is connected to the input end of the conversion module 107;
所述转换模块107的输出端与所述场效应管108的源极连接；The output end of the conversion module 107 is connected to the source of the field effect transistor 108;
所述直流电源连接器101的输出端与所述场效应管108的栅极、所述隔离二极管109一端连接；The output end of the DC power connector 101 is connected to the gate of the field effect transistor 108 and one end of the isolation diode 109;
所述场效应管108的漏极与所述隔离二极管109另一端连接。The drain of the field effect transistor 108 is connected to the other end of the isolation diode 109 .
在实际应用中，以太网接口是以太网网络数据连接的端口，以太网是应用最广泛的局域网通讯方式，同时也是一种协议。In practical applications, the Ethernet interface is the port of the Ethernet network data connection. Ethernet is the most widely used local area network communication method and is also a protocol.
整流桥堆是由两个或四个二极管组成的整流器件，有半桥、全桥以及三相桥三种类型，半桥又有正半桥和负半桥两种。The rectifier bridge stack is a rectifier device composed of two or four diodes. There are three types of half bridges, full bridges and three-phase bridges. Half bridges have two types: positive half bridges and negative half bridges.
共模电感106，也叫共模扼流圈，常用于过滤共模的电磁干扰信号，共模干扰是指两条走线和地线之间的电位差引起的干扰。在板卡设计中，共模电感也是起滤波的作用，用于抑制高速信号线产生的电磁波向外辐射发射。 Common mode inductor 106, also called common mode choke coil, is often used to filter common mode electromagnetic interference signals. Common mode interference refers to the interference caused by the potential difference between the two traces and the ground wire. In the design of the board, the common mode inductance also plays the role of filtering, which is used to restrain the electromagnetic wave generated by the high-speed signal line from radiating and radiating outward.
本发明的转换模块107为转变输入电压后输出固定电压的电压转换器。The conversion module 107 of the present invention is a voltage converter that outputs a fixed voltage after converting the input voltage.
场效应管108是利用控制输入回路的电场效应来控制输出回路电流的一种半导体器件。在本发明实施例中，系统中使用的场效应管108为P沟道场效应管。通过控制栅极上的电压可以控制源极与漏极之间的导通与否。The FET 108 is a semiconductor device that uses the electric field effect of the control input loop to control the output loop current. In the embodiment of the present invention, the field effect transistor 108 used in the system is a P-channel field effect transistor. The conduction between the source and drain can be controlled by controlling the voltage on the gate.
隔离二极管109是利用二极管的单向导通原理，对某方向电压的导通起到隔离作用。隔离二极管一般情况下正向导通电压在0.6～0.8V之间。The isolation diode 109 uses the unidirectional conduction principle of the diode to isolate the conduction of the voltage in a certain direction. In general, the forward conduction voltage of the isolation diode is between 0.6 and 0.8V.
在本发明实施例中，直流电源连接器101输入端与直流电源连接，为系统提供一路直流电源。第一以太网接口102的第一直流电源输出端与第二以太网接口103的第二直流电源输出端分别输出一路44～57VDC之间的电源，在一个示例中，第一以太网接口102和第二以太网口103输出的电源的典型值为48VDC。In the embodiment of the present invention, the input end of the DC power connector 101 is connected to the DC power supply to provide a DC power supply for the system. The first DC power output terminal of the first Ethernet interface 102 and the second DC power output terminal of the second Ethernet interface 103 output a power supply between 44 and 57 VDC respectively. In an example, the first Ethernet interface 102 The typical value of the power output from the second Ethernet port 103 is 48VDC.
第一以太网接口102通过第一直流电源输出端与第一整流桥堆104的输入端连接。第一以太网接口102设置有变压器，变压器中心抽头输出的电源有两条正极电源信号VIN+和两条负极电源信号VIN-，使用第一整流桥堆104能够实现对上述电源信号的正负分离，防止倒灌和正负串扰。同理，第二以太网接口103通过第二直流电源输出端与第二整流桥堆105的输入端连接，通过第二整流桥堆105实现对第一以太网接口输出电源信号的正负分离，防止倒灌和正负串扰。The first Ethernet interface 102 is connected to the input end of the first rectifier bridge stack 104 through the output end of the first DC power supply. The first Ethernet interface 102 is provided with a transformer, and the power supply output by the center tap of the transformer has two positive power supply signals VIN+ and two negative power supply signals VIN-, the use of the first rectifier bridge stack 104 can realize the positive and negative separation of the above-mentioned power supply signals, Prevent backflow and positive and negative crosstalk. Similarly, the second Ethernet interface 103 is connected to the input end of the second rectifier bridge stack 105 through the second DC power output end, and the positive and negative separation of the output power signal of the first Ethernet interface is realized through the second rectifier bridge stack 105, Prevent backflow and positive and negative crosstalk.
第一整流桥堆104的输出端和第二整流桥堆105的输出端分别与共模电感106的输入端连接，共模电感106可以过滤第一整流桥堆104和第二整流桥堆105之间共模产生的电磁干扰信号。经过共模电感106过滤的电源信号进入转换模块107，可以将44～57VDC的电源降压为负载所需的低电压直流电源，从而稳定输出电压为12.00V-12.03V，最大电流为2.5A的供电电源。The output end of the first rectifier bridge stack 104 and the output end of the second rectifier bridge stack 105 are respectively connected to the input end of the common mode inductor 106 , and the common mode inductor 106 can filter the gap between the first rectifier bridge stack 104 and the second rectifier bridge stack 105 . Electromagnetic interference signals generated by common mode. The power signal filtered by the common mode inductor 106 enters the conversion module 107, which can step down the power supply of 44-57VDC to the low-voltage DC power supply required by the load, thereby stabilizing the output voltage of 12.00V-12.03V and the maximum current of 2.5A. Power supply.
在一个示例中，转换模块107可以为PoE+DC-DC转换模块，其输出的电源为PoE直流电源。In one example, the conversion module 107 may be a PoE+DC-DC conversion module, and the output power source is a PoE DC power source.
转换模块107输出的PoE直流电源通过场效应管108的源极传递至场效应管108，当场效应管108的栅极没有外接电压时，源极与漏极处于导通状态，场效应管108的漏极可通过隔离二极管109向外输送PoE直流电 源。而当场效应管108的栅极存在外接电压时，源极与漏极的导通状态会被阻断。The PoE DC power output from the conversion module 107 is transmitted to the FET 108 through the source of the FET 108. When there is no external voltage on the gate of the FET 108, the source and the drain are in a conducting state, and the The drain can send PoE DC power out through the isolation diode 109 . When the gate of the field effect transistor 108 has an external voltage, the conduction state of the source and the drain is blocked.
本发明实施例通过直流电源连接器101输出的直流电源为场效应管108的栅极提供正压，用于控制是否输出PoE直流电源。同时，当直流电源连接器101输出直流电源时，直流电源连接器101通过隔离二极管109向外输送直流电源。具体地，当栅极有直流电源输入时，P沟道场效应管栅极电压大于源极电压，P沟道场效应管处于截止状态，PoE直流电源关断，使用直流电源供电；当栅极没有直流电源输入时，P沟道场效应管栅极电压小于源极电压，P沟道场效应管处于导通状态，PoE直流电源导通，使用PoE直流电源供电。In this embodiment of the present invention, the DC power output from the DC power connector 101 provides a positive voltage for the gate of the field effect transistor 108 to control whether to output the PoE DC power. Meanwhile, when the DC power connector 101 outputs DC power, the DC power connector 101 transmits the DC power to the outside through the isolation diode 109 . Specifically, when the gate has a DC power input, the gate voltage of the P-channel FET is greater than the source voltage, the P-channel FET is in an off state, the PoE DC power supply is turned off, and the DC power supply is used for power supply; when the gate has no DC power When the power supply is input, the gate voltage of the P-channel FET is less than the source voltage, the P-channel FET is in a conducting state, the PoE DC power supply is turned on, and the PoE DC power supply is used for power supply.
由上述内容可以理解，直流电源连接器101输出的直流电源可以阻断PoE直流电源的导通。因此直流电源连接器101输出的直流电源比PoE直流电源具有更高的优先级。同时直流电源和PoE直流电源两者之间同一时间内只有一路电源向外供电。It can be understood from the above content that the DC power output by the DC power connector 101 can block the conduction of the PoE DC power. Therefore, the DC power output by the DC power connector 101 has a higher priority than the PoE DC power. At the same time, between the DC power supply and the PoE DC power supply, only one power supply can supply power to the outside at the same time.
在本发明实施例中，为了防止两路电源之间倒灌，可以对两路电源使用隔离二极管109进行隔离。具体体现为两路电源按导通方向分别接入第一隔离二极管和第二隔离二极管。从而形成互为冗余备份的关系。In this embodiment of the present invention, in order to prevent backflow between the two power sources, an isolation diode 109 may be used to isolate the two power sources. Specifically, the two power sources are respectively connected to the first isolation diode and the second isolation diode according to the conduction direction. Thereby forming a relationship of mutual redundant backup.
需要说明的是，第一以太网接口102和第二以太网接口103输入的两路供电同样是冗余备份关系，以最先和PoE+DC-DC转换模块协商成功的接口作为外部供电输入。当第一以太网接口102或第二以太网接口103停止供电时，PoE+DC-DC转换模块立即与另外一路接口进行PoE供电的协商，并最终和协商成功的以太网接口建立供电-受电关系。It should be noted that the two power supplies input by the first Ethernet interface 102 and the second Ethernet interface 103 are also in a redundant backup relationship, and the first interface successfully negotiated with the PoE+DC-DC conversion module is used as the external power supply input. When the first Ethernet interface 102 or the second Ethernet interface 103 stops power supply, the PoE+DC-DC conversion module immediately negotiates PoE power supply with another interface, and finally establishes power supply-receiving power with the successfully negotiated Ethernet interface relation.
在本发明实施例中，还包括：In the embodiment of the present invention, it also includes:
一端与所述第一直流电源输出端连接，另一端与预设接地线连接的第一瞬态抑制二极管(第一TVS管)110。One end is connected to the output end of the first DC power supply, and the other end is connected to a first TVS diode (a first TVS tube) 110 with a predetermined ground line.
一端与所述第二直流电源输出端连接，另一端与所述预设接地线连接的第二瞬态抑制二极管(第二TVS管)111。One end is connected to the output end of the second DC power supply, and the other end is connected to the second TVS diode (second TVS tube) 111 connected to the predetermined ground line.
具体地，第一瞬态抑制二极管110和第二瞬态抑制二极管111用于抑制共模浪涌。浪涌指电源刚开通的那一瞬息产生的强力脉冲。由于电路本身的线性有可能高于电源本身的脉冲；浪涌很可能使电路在浪涌一瞬间烧 坏，如PN结电容击穿，电阻烧断等。Specifically, the first TVS diode 110 and the second TVS diode 111 are used to suppress common mode surges. Surge refers to a powerful pulse generated at the moment when the power supply is just turned on. Because the linearity of the circuit itself may be higher than the pulse of the power supply itself; the surge is likely to cause the circuit to burn out in an instant, such as PN junction capacitor breakdown, resistor burnout, etc.
在本发明实施例中，共模电感106的输入端包括正信号输入接口和负信号输入接口，以太网双网口和直流冗余供电系统还包括：In the embodiment of the present invention, the input end of the common mode inductor 106 includes a positive signal input interface and a negative signal input interface, and the Ethernet dual network port and DC redundant power supply system further includes:
一端与所述正信号输入接口连接，另一端与所述负信号输入接口连接的第三瞬态抑制二极管(第三TVS管)112。A third TVS diode (third TVS tube) 112 having one end connected to the positive signal input interface and the other end connected to the negative signal input interface.
具体地，第三瞬态抑制二极管112用于抑制差模浪涌。Specifically, the third TVS diode 112 is used to suppress differential mode surges.
在本发明实施例中，第一以太网接口102还具有第一网络信号输出端口，第一网络输出端口用于输出第一网络信号。In this embodiment of the present invention, the first Ethernet interface 102 further has a first network signal output port, and the first network output port is used for outputting the first network signal.
第二以太网接口103还具有第二网络信号输出端口，用于输出第二网络信号。The second Ethernet interface 103 also has a second network signal output port for outputting the second network signal.
第一网络输出端口通过第一防静电瞬态抑制二极管阵列(第一TVS阵列)113与接地线连接，第二网络输出端口通过第二防静电瞬态抑制二极管阵列(第二TVS阵列)114与接地线连接，第一防静电瞬态抑制二极管阵列113和第二防静电瞬态抑制二极管阵列114用于防止外部静电损害和干扰。The first network output port is connected to the ground wire through the first anti-static TVS array (first TVS array) 113 , and the second network output port is connected to the ground through the second anti-static TVS array (second TVS array) 114 . The ground wire is connected, and the first ESD TVS diode array 113 and the second ESD TVS diode array 114 are used to prevent external static electricity damage and interference.
请参阅图2，图2为本发明另一实施例提供的一种以太网双网口和直流冗余供电系统的结构示意图。其中包括图1所有模块组成的A部分。Please refer to FIG. 2 , which is a schematic structural diagram of an Ethernet dual network port and DC redundant power supply system according to another embodiment of the present invention. This includes Part A, which consists of all the modules in Figure 1.
参见图1和图2，本发明实施例所涉及的系统，还可以包括：Referring to FIG. 1 and FIG. 2 , the system involved in the embodiment of the present invention may further include:
通过直流供电线115与直流电源连接器101的输入端连接的直流电源116；A DC power supply 116 connected to the input end of the DC power supply connector 101 through the DC power supply line 115;
通过第一以太网线缆117与第一以太网接口102的输入端连接的第一交换机118；a first switch 118 connected to the input end of the first Ethernet interface 102 through the first Ethernet cable 117;
通过第二以太网线缆119与第二以太网接口103的输入端连接的第二交换机120。The second switch 120 is connected to the input end of the second Ethernet interface 103 through the second Ethernet cable 119 .
在本发明实施例中，电源及信号输入源为直流电源116，PSE(Power Sourcing Equipment，供电设备)交换机118和PSE交换机120，输出降压后的直流供电和网络信号。在实际应用中，可以根据后端负载电路的功率需要，选择输入电源的功率和交换机的等级。In this embodiment of the present invention, the power supply and signal input sources are a DC power supply 116, a PSE (Power Sourcing Equipment, power supply equipment) switch 118 and a PSE switch 120, which output the reduced DC power supply and network signals. In practical applications, the power of the input power supply and the level of the switch can be selected according to the power requirements of the back-end load circuit.
PSE交换机根据供电标准的不同分为三种类型：PSE switches are divided into three types according to different power supply standards:
1)IEEE802.3af(PoE)交换机，可输出功率15.40瓦，受电端可用的最 大功率为12.95瓦；1) IEEE802.3af (PoE) switch, the output power is 15.40 watts, and the maximum power available at the receiving end is 12.95 watts;
2)IEEE802.3at(PoE+)交换机，可输出功率34.2瓦，受电端可用的最大功率为25.50瓦；兼容IEEE802.3af；2) IEEE802.3at (PoE+) switch, the output power is 34.2 watts, and the maximum power available at the receiving end is 25.50 watts; compatible with IEEE802.3af;
3)IEEE802.3bt(PoE++)交换机，可输出功率72瓦以上，受电端可用的最大功率为71瓦；兼容IEEE802.3af，IEEE802.3at。3) IEEE802.3bt (PoE++) switch, which can output more than 72 watts of power, and the maximum power available at the receiving end is 71 watts; compatible with IEEE802.3af, IEEE802.3at.
当PSE交换机为IEEE802.3af(PoE)交换机类型时，本发明可输出最大12.95瓦直流电源；当PSE交换机为IEEE802.3at(PoE+)或IEEE802.3bt(PoE++)交换机类型时，本发明可输出最大25.5瓦直流电源。When the PSE switch is an IEEE802.3af (PoE) switch type, the present invention can output a maximum of 12.95 watts of DC power; when the PSE switch is an IEEE802.3at (PoE+) or IEEE802.3bt (PoE++) switch type, the present invention can output a maximum of 12.95 watts of DC power. 25.5W DC power supply.
在一个示例中，当多网口负载电路121需要的功率P≤12.95瓦(即电压12V，电流≤1.08A)时，可选以上任意一种交换机作为输入供电；当后端负载需要的功率P>12.95瓦且≤25.50瓦时(即电压12V，1.08A≤电流≤2.125A)时，可选IEEE802.3at(PoE+)交换机或IEEE802.3bt(PoE++)交换机作为输入供电。In an example, when the power P required by the multi-network port load circuit 121 is less than or equal to 12.95 watts (ie, the voltage is 12V and the current is less than or equal to 1.08A), any one of the above switches can be selected as the input power supply; when the power required by the back-end load P When >12.95W and ≤25.50Wh (ie voltage 12V, 1.08A≤current≤2.125A), IEEE802.3at (PoE+) switch or IEEE802.3bt (PoE++) switch can be selected as input power supply.
需要说明的是，以太网线缆的选择需要注意：PoE供电的安全传输距离为100米，线缆等级为超五类(或六类)全铜网线。It should be noted that the selection of Ethernet cables requires attention: the safe transmission distance of PoE power supply is 100 meters, and the cable grade is all copper network cables of Category 5e (or Category 6).
本发明通过直流电源连接器101控制场效应管108的栅极，以控制第一以太网接口102和第二以太网接口103的输出电源的导通和关断，实现同一时间只有一路电源供电，且直流电源连接器101输出的电源为最高优先级。同时场效应管108的漏极和直流电源连接器101的输出端通过隔离二极管109隔离，防止了直流电源连接器101的输出电源和场效应管108的输出电源之间出现倒灌现象，形成互为冗余备份的关系。In the present invention, the gate of the field effect transistor 108 is controlled by the DC power connector 101 to control the turn-on and turn-off of the output power of the first Ethernet interface 102 and the second Ethernet interface 103, so that only one power supply can be supplied at the same time, And the power output from the DC power connector 101 has the highest priority. At the same time, the drain of the FET 108 and the output end of the DC power connector 101 are isolated by the isolation diode 109, which prevents the backflow phenomenon between the output power of the DC power connector 101 and the output power of the FET 108, forming a mutual The relationship of redundant backup.
在本申请所提供的几个实施例中，应该理解到，所揭露的系统，可以通过其它的方式实现。In the several embodiments provided in this application, it should be understood that the disclosed system may be implemented in other manners.
以上所述，以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: The technical solutions described in the embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

  1. 一种以太网双网口和直流冗余供电系统，其特征在于，包括：An Ethernet dual network port and DC redundant power supply system is characterized in that, comprising:
    直流电源连接器，第一以太网接口，第二以太网接口，第一整流桥堆，第二整流桥堆，共模电感，转换模块，场效应管和隔离二极管；所述场效应管具有源极，栅极和漏极；所述隔离二极管包括第一隔离二极管和第二隔离二极管；DC power connector, first Ethernet interface, second Ethernet interface, first rectifier bridge stack, second rectifier bridge stack, common mode inductor, conversion module, field effect transistor and isolation diode; the field effect transistor has a source pole, gate and drain; the isolation diode includes a first isolation diode and a second isolation diode;
    所述第一以太网接口具有第一直流电源输出端，所述第一直流电源输出端与所述第一整流桥堆的输入端连接；The first Ethernet interface has a first DC power output terminal, and the first DC power output terminal is connected to the input terminal of the first rectifier bridge stack;
    所述第二以太网接口具有第一直流电源输出端，所述第二直流电源输出端与所述第二整流桥堆的输入端连接；The second Ethernet interface has a first DC power output terminal, and the second DC power output terminal is connected to the input terminal of the second rectifier bridge stack;
    所述第一整流桥堆的输出端、所述第二整流桥堆的输出端分别与所述共模电感的输入端连接；The output end of the first rectifier bridge stack and the output end of the second rectifier bridge stack are respectively connected with the input end of the common mode inductor;
    所述共模电感的输出端与所述转换模块的输入端连接；The output end of the common mode inductor is connected to the input end of the conversion module;
    所述转换模块的输出端与所述场效应管的源极连接；The output end of the conversion module is connected to the source of the field effect transistor;
    所述直流电源连接器的输出端与所述场效应管的栅极、所述所述第一隔离二极管一端连接；The output end of the DC power connector is connected to the gate of the field effect transistor and one end of the first isolation diode;
    所述场效应管的漏极与所述第二隔离二极管一端连接。The drain of the field effect transistor is connected to one end of the second isolation diode.
  2. 根据权利要求1所述的以太网双网口和直流冗余供电系统，其特征在于，还包括：The Ethernet dual network port and DC redundant power supply system according to claim 1, further comprising:
    一端与所述第一直流电源输出端连接，另一端与预设接地线连接的第一瞬态抑制二极管。One end is connected to the output end of the first DC power supply, and the other end is connected to a first transient suppression diode with a preset ground line.
  3. 根据权利要求1所述的以太网双网口和直流冗余供电系统，其特征在于，还包括：The Ethernet dual network port and DC redundant power supply system according to claim 1, further comprising:
    一端与所述第二直流电源输出端连接，另一端与所述预设接地线连接的第二瞬态抑制二极管。One end is connected to the output end of the second DC power supply, and the other end is connected to the second transient suppression diode of the preset ground line.
  4. 根据权利要求1所述的以太网双网口和直流冗余供电系统，其特征在于，所述共模电感的输入端包括正信号输入接口和负信号输入接口；所述以太网双网口和直流冗余供电系统还包括：The Ethernet dual network port and DC redundant power supply system according to claim 1, wherein the input end of the common mode inductor comprises a positive signal input interface and a negative signal input interface; the Ethernet dual network port and The DC redundant power supply system also includes:
    一端与所述正信号输入接口连接，另一端与所述负信号输入接口连接 的第三瞬态抑制二极管。A third TVS diode whose one end is connected to the positive signal input interface and the other end is connected to the negative signal input interface.
  5. 根据权利要求1所述的以太网双网口和直流冗余供电系统，其特征在于，所述第一以太网接口还具有第一网络信号输出端口。The Ethernet dual network port and DC redundant power supply system according to claim 1, wherein the first Ethernet interface further has a first network signal output port.
  6. 根据权利要求1所述的以太网双网口和直流冗余供电系统，其特征在于，所述第二以太网接口还具有第二网络信号输出端口。The Ethernet dual network port and DC redundant power supply system according to claim 1, wherein the second Ethernet interface further has a second network signal output port.
  7. 根据权利要求1所述的以太网双网口和直流冗余供电系统，其特征在于，还包括：The Ethernet dual network port and DC redundant power supply system according to claim 1, further comprising:
    通过直流供电线与所述直流电源连接器的输入端连接的直流电源。A DC power supply connected to the input end of the DC power supply connector through a DC power supply line.
  8. 根据权利要求1所述的以太网双网口和直流冗余供电系统，其特征在于，还包括：The Ethernet dual network port and DC redundant power supply system according to claim 1, further comprising:
    通过第一以太网线缆与所述第一以太网接口的输入端连接的第一交换机；a first switch connected to the input end of the first Ethernet interface through a first Ethernet cable;
    通过第二以太网线缆与所述第二以太网接口的输入端连接的第二交换机。A second switch connected to the input end of the second Ethernet interface through a second Ethernet cable.
  9. 根据权利要求5所述的以太网双网口和直流冗余供电系统，其特征在于，还包括：The Ethernet dual network port and DC redundant power supply system according to claim 5, further comprising:
    一端与所述第一网络信号输出端口连接，另一端与预设接地线连接的第一防静电瞬态抑制二极管阵列。One end is connected to the first network signal output port, and the other end is connected to a first anti-static transient suppression diode array with a preset ground line.
  10. 根据权利要求6所述的以太网双网口和直流冗余供电系统，其特征在于，还包括：The Ethernet dual network port and DC redundant power supply system according to claim 6, further comprising:
    一端与所述第二网络信号输出端口连接，另一端与预设接地线连接的第二防静电瞬态抑制二极管阵列。One end is connected to the second network signal output port, and the other end is connected to a second anti-static transient suppression diode array with a preset ground line.
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