WO2019100280A1 - Circuit de réception d'énergie - Google Patents

Circuit de réception d'énergie Download PDF

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Publication number
WO2019100280A1
WO2019100280A1 PCT/CN2017/112528 CN2017112528W WO2019100280A1 WO 2019100280 A1 WO2019100280 A1 WO 2019100280A1 CN 2017112528 W CN2017112528 W CN 2017112528W WO 2019100280 A1 WO2019100280 A1 WO 2019100280A1
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WO
WIPO (PCT)
Prior art keywords
module
power receiving
receiving circuit
circuit device
poe network
Prior art date
Application number
PCT/CN2017/112528
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English (en)
Chinese (zh)
Inventor
安云霖
陆承明
陈天
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201780037703.3A priority Critical patent/CN110073635A/zh
Priority to PCT/CN2017/112528 priority patent/WO2019100280A1/fr
Publication of WO2019100280A1 publication Critical patent/WO2019100280A1/fr

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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

Definitions

  • the present application relates to the field of communications, and in particular, to a power receiving circuit device.
  • PoE Power over Ethernet
  • PoE technology provides the power required to operate the device while transmitting the required data to a standard network device through a simple interface and an existing standard network cable. PoE technology can ensure the normal operation of existing networks while minimizing costs while ensuring the security of existing structured cabling.
  • the power supply system using PoE technology includes two devices: Power Sourcing Equipment (PSE) and Powered Device (PD), as shown in Figure 1.
  • the power supply device 101 provides a -48 V DC power supply on each of the power supply ports (RJ-45 ports) to directly drive the standard network cable 103. Power is supplied to the power receiving apparatus 102 under the condition of a maximum length of 100 m.
  • the main function of the PSE is to detect whether a compatible powered device is connected to or disconnected from the system, and to classify the powered device to provide power for the corresponding power or to cut off the power.
  • the power receiving device 102 is a device that obtains power from a standard network line through a PoE network port, such as a Voice over Internet Protocol (VoIP) phone, a wireless access point (AP), a network camera, and the like.
  • VoIP Voice over Internet Protocol
  • AP wireless access point
  • network camera and the like.
  • VoIP technology based on VoIP technology more and more widely used in enterprise business.
  • the industry's VoIP phones support the use of standard power cord power and PoE power.
  • PoE PoE for power supply.
  • the VoIP phone used in the industry is convenient for a personal computer (PC) and a VoIP phone to share a network (the network data of the PC is transparently transmitted through the network port of the VoIP phone), and both adopt a dual PoE network port design.
  • the uplink network port supports PoE power supply, and is connected to a wall-mounted network socket through a network cable to provide power and network connection for the VoIP phone.
  • the downlink network port is connected to the PC, and the network connection obtained by the uplink network port is provided to the PC. This design limits the way users connect to VoIP phones, which limits their use.
  • the embodiment of the present application provides a power receiving circuit device, which can solve the problem that the two PoE network ports of the power receiving device supply power to the power receiving device without any difference.
  • a power receiving circuit device is provided, the power receiving circuit device being applied to a device comprising two Power over Ethernet PoE network ports.
  • a circuit arrangement includes a detection module, a control module and a switch module.
  • the detection module includes two input ends: a first input end and a second input end. The first input end is connected to the first PoE network port of the device, and the second input end is connected to the second PoE network port of the device.
  • the detection module is used to detect the voltage of two PoE network ports.
  • the power receiving circuit device includes two switch modules, wherein the first switch module is serially connected between the first PoE network port and the output end of the power receiving circuit device, and the second switch module is serially connected to the second PoE network port.
  • the control module includes an input that is coupled to the output of the detection module.
  • the control module is configured to control the on and off of the two switch modules according to the output voltage of the detection module: the first output end of the control module controls the on and off of the first switch module, and the second output end of the control module controls the on and off of the second switch module .
  • the first output end of the control module controls the on and off of the first switch module
  • the second output end of the control module controls the on and off of the second switch module .
  • the detection module includes a comparator circuit structure. Through the comparator circuit structure, it is possible to accurately detect which one of the two PoE network ports is connected to the power supply device. The PoE network port connected to the power supply device is different, and the output level of the detection module is different.
  • the detecting module when the voltage of the first input end of the detecting module is higher than the voltage of the second input end, the detecting module outputs a high power The detection module outputs a low level when the voltage of the first input terminal of the detection module is lower than the voltage of the second input terminal.
  • the control module includes an N-type metal oxide semiconductor field effect transistor MOSFET And a P-type MOSFET having a gate connected to the gate of the P-type MOSFET and connected to the input of the control module.
  • the source of the N-type MOSFET is grounded to the drain of the P-type MOSFET.
  • the drain of the N-type MOSFET is connected to the first output of the control module
  • the source of the P-type MOSFET is connected to the second output of the control module.
  • the drain of the N-type MOSFET is connected to the second output of the control module
  • the source of the P-type MOSFET is connected to the first output of the control module.
  • the above connection method allows only one MOSFET to be turned on at the same time: the N-type MOSFET is turned on when the detection module outputs a high level, and the P-type MOSFET is turned on when the output is low. It is guaranteed that only one of the two switch modules is turned on at the same time.
  • the power receiving circuit device further includes a first rectifier bridge stack and a The second rectifier bridge stack, the first rectifier bridge stack and the second rectifier bridge stack are used to convert alternating current into direct current.
  • the first rectifier bridge stack is connected between the first PoE network port and the first input end of the detection module, and the second rectifier bridge stack is connected between the second PoE network port and the second input end of the detection module.
  • the first switch module is connected in series between the first rectifier bridge stack and the output end of the power receiving circuit device, and the second switch module is serially connected between the second rectifier bridge stack and the output terminal.
  • a power receiving circuit device in a second aspect, is provided, the power receiving circuit device being applied to a device comprising two Power over Ethernet PoE network ports.
  • a circuit arrangement includes a detection module and a switch module.
  • the detection module includes two input ends: a first input end and a second input end. The first input end is connected to the first PoE network port of the device, and the second input end is connected to the second PoE network port of the device.
  • the detection module is used to detect the voltage of two PoE network ports.
  • the switch module includes three input terminals: a first input terminal, a second input terminal, and a third input terminal.
  • the first input end is connected to the first PoE network port
  • the second input end is connected to the second PoE network port
  • the third input end is connected to the output end of the detecting module
  • the third input end is used according to the output voltage of the detecting module
  • the output voltage of the output of the switch module is controlled, and the output of the switch module is used to supply power to the device.
  • any one of the PoE network ports can be connected to the power supply device, and the power supply to the power receiving device can be realized.
  • the user must use the specified method to connect to the restricted device.
  • the detection module includes a comparator circuit structure.
  • the characteristics and effects of the comparator circuit structure have been previously described and will not be repeated here.
  • the detecting module In combination with the second aspect or the first possible implementation of the second aspect, in a second possible implementation manner, When the voltage of the first input end of the detecting module is higher than the voltage of the second input end, the detecting module outputs a high level; when the voltage of the first input end of the detecting module is lower than the voltage of the second input end, the detecting module outputs a low level.
  • the switch module includes a multiplexer circuit structure. Through the multiplexer circuit structure, the path conduction between one of the input terminals and the output terminal of the switch module can be controlled according to the output voltage of the detection module.
  • a fourth possible implementation manner when the detection module outputs a high level, the first input of the switch module The path between the terminal and the output of the switch module is turned on.
  • a fifth possible implementation manner when the detection module outputs a low level, the second input of the switch module The path between the terminal and the output of the switch module is turned on.
  • the above connection method ensures that no matter which PoE network port the user uses to connect to the power supply device, the power supply can be supplied to the powered device.
  • the circuit device further includes a first rectifier bridge stack and a second rectification
  • the bridge stack, the first rectifier bridge stack and the second rectifier bridge stack are used to convert alternating current to direct current.
  • the first rectifier bridge stack is connected between the first PoE network port and the first input end of the detection module, and the second rectifier bridge stack is connected between the second PoE network port and the second input end of the detection module.
  • the first rectifier bridge stack is connected between the first PoE network port and the first input end of the switch module, and the second rectifier bridge stack is connected between the second PoE network port and the second input end of the switch module.
  • the limitation that the user must connect to the powered device in a specified manner is released.
  • FIG. 1 is a schematic diagram of a PoE networking in the prior art
  • FIG. 2 is a schematic structural diagram of a power receiving circuit device 200 according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a power receiving circuit device 300 according to an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a power receiving circuit device 400 according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a power receiving circuit device 500 according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a VoIP telephone connection according to an embodiment of the present application.
  • the embodiment of the present application provides a power receiving circuit device, which can solve the problem that the two PoE network ports of the powered device have no difference to supply power to the powered device, and the limitation that the user must connect to the powered device in a specified manner is removed. From the perspective of the power supply device, the power receiving circuit device receives power supply from the power supply device; from the perspective of the power receiving device, the power receiving circuit device supplies power from the power supply device to the power receiving device, and the power receiving device receives the power The device is powered.
  • the embodiments of the present application are described below.
  • FIG. 2 is a schematic structural diagram of a power receiving circuit device 200 according to an embodiment of the present application.
  • the power receiving circuit The device 200 includes a detection module 201, a control module 202, and switch modules 2031, 2032.
  • the detecting module 201 is configured to detect the voltages of the PoE network ports 2041 and 2042
  • the control module 202 is configured to control the switching of the switch modules 2031 and 2032 according to the output voltage of the detecting module 201.
  • the switch module 2031 is configured to control whether the voltage of the PoE network port 2041 is transmitted to the output end
  • the switch module 2032 is configured to control whether the voltage of the PoE network port 2042 is transmitted to the output end.
  • the input terminal D1 of the detection module 201 is connected to the PoE network port 2041, and the input terminal D2 of the detection module is connected to the PoE network port 2042.
  • the switch module 2031 is connected in series between the PoE network port 2041 and the output end of the power receiving circuit device 200.
  • the switch module 2032 is connected in series between the PoE network port 2042 and the output terminal.
  • the output of the power receiving circuit device 200 is used to connect a load to supply power to the load.
  • the load is a power receiving device.
  • the input terminal C1 of the control module 202 is connected to the output terminal D3 of the detection module 201.
  • the output terminal C2 of the control module 202 controls the switching of the switch module 2031.
  • the output terminal C3 of the control module 202 controls the switching of the switch module 2032.
  • the switch module 2031 When one of 2032 is in the on state, the other is in the off state.
  • the embodiment of the present application provides a schematic structural diagram of the power receiving circuit device 300, as shown in FIG.
  • the detection module 304 includes a comparator circuit structure
  • the control module 305 includes two Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) Q1 and Q2.
  • MOSFETs Metal-Oxide-Semiconductor Field-Effect Transistors
  • the resistors R1, R2, and R3 may be included, and the two switch modules respectively include switches S1 and S2, and S1 and S2 may specifically be N-channel MOSFETs.
  • the power receiving circuit device 300 may further include a rectifier bridge stack 3021, 3022 and a PoE chip.
  • the rectifier bridge stack 3021 is connected between the PoE network port 3011 and the input terminal X1 of the detection module 304.
  • the rectifier bridge stack 3022 is connected between the PoE network port 3012 and the input terminal X2 of the detection module 304 for converting AC power into DC power.
  • a PoE chip (not shown) is connected between the output end of the power receiving circuit device and the power receiving device, and is configured to convert the voltage at the output end of the power receiving circuit device into a voltage power source required by the power receiving device. Generally, PoE The chip is used to reduce the voltage at the output of the powered circuit device.
  • the input voltage is 48V after being processed by the rectifier bridge stack 3021, that is, the voltage at point A is 48V. Since the power supply port is not the PoE network port 3012 at this time, the input voltage of the PoE network port 3012 is 0 V after being processed by the rectifier bridge stack 3022, that is, the voltage at the point B is 0V.
  • the voltage at point A and the voltage at point B are transmitted to detection module 304 for detection.
  • the input voltage of input terminal X1 of the comparator device is 48V, and the input voltage of input terminal X2 is 0V.
  • the output terminal when the input voltage of the X1 terminal is higher than the X2 terminal, the output terminal outputs a high level; when the input voltage of the X1 terminal is lower than the X2 terminal, the output terminal outputs a low level. Therefore, at this time, point C outputs a high level, which is a logic "1".
  • An input of the control module 305 is coupled to an output of the detection module 304. Since point C is high, Q1 is turned on, Q2 is turned off, and voltage at point E is low, that is, logic "0". At this time, the switch module 3031 is turned on, and the 48V voltage processed by the PoE network port 3011 through the rectifier bridge stack 3021 is transmitted to the output end of the power receiving circuit device to supply power to the power receiving device.
  • the PoE load in the figure is a powered device that needs to be powered.
  • the input voltage is 48V after being processed by the rectifier bridge stack 3022, that is, the voltage at point B is 48V. Since the power supply port is not the PoE network port 3011 at this time, the input voltage of the PoE network port 3011 is 0 V after being processed by the rectifier bridge stack 3021, that is, the voltage at the point A is 0V. The voltage at point A and the voltage at point B are transmitted to detection module 304 for detection.
  • the input voltage of input terminal X1 of the comparator device is 0V, and the input voltage of input terminal X2 is 48V.
  • the C point outputs a low level, which is a logical "0".
  • the input terminal of the control module 305 inputs a low level, so Q2 is turned on, Q1 is turned off, and the voltage at the D point is low level, that is, logic "0".
  • the switch module 3032 is turned on, and the 48V voltage processed by the PoE network port 3012 through the rectifier bridge stack 3022 is transmitted to the output end of the power receiving circuit device to supply power to the power receiving device.
  • circuit configuration of the detection module, the control module, and the switch module in the embodiment of FIG. 3 is a In the embodiment, those skilled in the art may also use other circuits to implement the functions of the above detection module, control module and switch module, but are included in the scope of protection of the present application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.
  • CMOS complementary MOSFETs
  • the power receiving circuit device is added between the PoE network port and the power receiving device, so that no matter which PoE network port the user connects to the power supply device, power can be supplied to the power receiving device.
  • the purpose is to relieve the user from having to use one of the specified PoE ports to connect to the powered device and the powered device, and the other to connect to other devices that require a network connection.
  • FIG. 4 is a schematic structural diagram of a power receiving circuit device 400 according to an embodiment of the present application.
  • the power receiving circuit device 400 includes a detecting module 401 and a switch module 402.
  • the detecting module 401 is configured to detect the voltages of the PoE network ports 4031 and 4032.
  • the switch module 402 is configured to control whether the voltages of the PoE network ports 4031 and 4032 are transmitted to the output end according to the output voltage of the detection module.
  • the input terminal D1 of the detection module 201 is connected to the PoE network port 4031, and the input terminal D2 of the detection module is connected to the PoE network port 4032.
  • the input terminal C1 of the switch module 402 is connected to the PoE network port 4031, the input terminal C2 of the switch module 402 is connected to the PoE network port 4032, and the input terminal C3 of the switch module 402 is connected to the output terminal D3 of the detection module 201.
  • the input terminal C3 of the switch module 402 is used to control the conduction between the input terminal C1 and the output terminal C4 according to the output voltage of the output terminal D3 of the detection module 201, or to control the path between the input terminal C2 and the output terminal C4. Turn on.
  • the path between the input terminal C1 and the output terminal C4 When the path between the input terminal C1 and the output terminal C4 is turned on, the path between the input terminal C2 and the output terminal C4 is turned off; when the path between the input terminal C1 and the output terminal C4 is turned off, the input terminal C2 and the output terminal are turned off.
  • the path between C4 is turned on.
  • the output terminal C4 of the switch module is connected to the output terminal of the power receiving circuit device 400.
  • the output of the power receiving circuit device 400 is used to connect a load to supply power to the load.
  • the load is a power receiving device.
  • the embodiment of the present application provides a schematic structural diagram of the power receiving circuit device 500, as shown in FIG. 5.
  • the detection module 501 includes a comparator circuit structure
  • the switch module 502 includes a multiplexer circuit structure.
  • the power receiving circuit device 500 may further include a rectifier bridge stack 5031, 5032 and a PoE chip.
  • the rectifier bridge stack 5031 is connected between the PoE network port 5041 and the input terminal X1 of the detection module 501.
  • the rectifier bridge stack 5032 is connected between the PoE network port 5041 and the input terminal X2 of the detection module 501 for converting AC power into DC power.
  • a PoE chip (not shown) is connected between the output end of the power receiving circuit device and the power receiving device, and is configured to convert the voltage at the output end of the power receiving circuit device into a voltage power source required by the power receiving device.
  • PoE The chip is used to reduce the voltage at the output of the powered circuit device.
  • the input voltage is 48V after being processed by the rectifier bridge stack 5031, that is, the voltage at point A is 48V. Since the power supply port is not the PoE network port 5042 at this time, the input voltage of the PoE network port 5042 is 0 V after being processed by the rectifier bridge stack 5032, that is, the voltage at the point B is 0V. The voltage at point A and the voltage at point B are transmitted to the detection module for detection.
  • the input voltage of the input terminal X1 of the comparator device is 48V, and the input voltage of the input terminal X2 is 0V.
  • the output terminal when the input voltage of the X1 terminal is higher than the X2 terminal, the output terminal outputs a high level; when the input voltage of the X1 terminal is lower than the X2 terminal, the output terminal outputs a low level. Therefore, at this time, point C outputs a high level, which is a logic "1".
  • the input C of the switch module 502 is connected to the output U1 of the detection module. Since point C is at a high level, the path between the input terminal S1 and the output terminal D is turned on at this time, and the path between the input terminal S2 and the output terminal D is turned off.
  • PoE network The port 5041 passes the 48V voltage processed by the rectifier bridge stack 5031 to the output terminal D to supply power to the powered device.
  • the PoE load in the figure is a powered device that needs to be powered.
  • the input voltage is 48V after being processed by the rectifier bridge stack 5032, that is, the voltage at point B is 48V. Since the power supply port is not the PoE network port 5041 at this time, the input voltage of the PoE network port 5041 is 0 V after being processed by the rectifier bridge stack 5031, that is, the voltage at the point A is 0V. The voltage at point A and the voltage at point B are transmitted to the detection module for detection.
  • the input voltage of the input terminal X1 of the comparator device is 0V, and the input voltage of the input terminal X2 is 48V.
  • the C point outputs a low level, which is a logical "0".
  • the input terminal C of the switch module 502 inputs a low level, so at this time, the path between the input terminal S2 and the output terminal D is turned on, and the path between the input terminal S1 and the output terminal D is turned off.
  • the 48V voltage processed by the PoE network port 5042 through the rectifier bridge stack 5032 is transmitted to the output terminal D to supply power to the powered device.
  • the ENB terminal of the multiplexer in the figure is the enable terminal, and the multiplexer can be used normally when enabled.
  • circuit configuration of the detection module and the switch module in the embodiment of FIG. 5 is a specific implementation manner, and those skilled in the art may also use other circuit configurations to implement the functions of the foregoing detection module and the switch module, but should be covered in Within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.
  • a resistor is added between the input terminals X1, X2 of the comparator and the rectifier bridge stack 5031, 5032 to reduce the input voltage of the comparator, and the comparator is protected; in the control module, in the multi-path complex A resistor is added between the input terminals S1, S2 of the user and the rectifier bridge stack 5031, 5032 to reduce the input voltage of the multiplexer, protect the multiplexer, and the like.
  • the power receiving circuit device is added between the PoE network port and the power receiving device, so that no matter which PoE network port the user connects to the power supply device, power can be supplied to the power receiving device.
  • the purpose is to relieve the user from having to use one of the specified PoE ports to connect to the powered device and the powered device, and the other to connect to other devices that require a network connection.
  • FIG. 6 is a schematic diagram of a VoIP telephone connection according to an embodiment of the present application.
  • the VoIP phone in the figure incorporates the power receiving circuit device described in any of the embodiments of Figs. 2 to 5.
  • the VoIP phone can be powered.
  • another PoE network port that is not connected to the power supply device can be connected to the PC to provide a network connection for the PC.

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Abstract

L'invention concerne un circuit de réception d'énergie, appliqué à un dispositif comprenant deux ports de réseau d'alimentation électrique par câble Ethernet (PoE). Le circuit de réception d'énergie comprend un module de détection, un module de commande et deux modules de commutation. Le module de détection est conçu pour détecter des tensions au niveau des deux ports de réseau PoE d'un dispositif, et le module de détection délivre différents niveaux en fonction de différents niveaux de tension des deux ports de réseau PoE. Le module de commande est conçu pour commander la marcher et l'arrêt des deux modules de commutation en fonction d'un niveau émis par le module de détection. Les modules de commutation activés réagissent différemment à différents niveaux émis par le module de détection. Lorsque l'un des deux modules de commutation est à l'état allumé, l'autre est à l'état éteint. La solution technique fournie par les modes de réalisation de la présente invention élimine la restriction selon laquelle les utilisateurs ont besoin d'utiliser un port de réseau PoE spécifié pour se connecter à un dispositif de réception d'énergie.
PCT/CN2017/112528 2017-11-23 2017-11-23 Circuit de réception d'énergie WO2019100280A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201780037703.3A CN110073635A (zh) 2017-11-23 2017-11-23 一种受电电路装置
PCT/CN2017/112528 WO2019100280A1 (fr) 2017-11-23 2017-11-23 Circuit de réception d'énergie

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Application Number Priority Date Filing Date Title
PCT/CN2017/112528 WO2019100280A1 (fr) 2017-11-23 2017-11-23 Circuit de réception d'énergie

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CN116192541B (zh) * 2022-12-28 2024-06-25 深圳市丰润达科技有限公司 PoE供电电路及装置

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TW201025786A (en) * 2008-12-31 2010-07-01 Asustek Comp Inc Current regulator
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CN101778460B (zh) * 2010-01-20 2012-08-08 华为技术有限公司 无线局域网内的受电方法、系统及多入多出设备
CN102215113B (zh) * 2011-06-08 2013-12-25 北京星网锐捷网络技术有限公司 以太网供电方法、装置及网络设备
CN103220155A (zh) * 2013-04-02 2013-07-24 京信通信系统（中国）有限公司 一种扩流方法、受电模块及以太网供电系统

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Publication number Priority date Publication date Assignee Title
US20060290208A1 (en) * 2005-06-13 2006-12-28 Micrel, Inc. Relay switch including an energy detection circuit
TW201025786A (en) * 2008-12-31 2010-07-01 Asustek Comp Inc Current regulator
CN101771273A (zh) * 2008-12-31 2010-07-07 华硕电脑股份有限公司 电流调节装置
CN107135082A (zh) * 2017-04-28 2017-09-05 上海斐讯数据通信技术有限公司 一种利用两个供电端设备共同供电的系统及方法

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