CN204836199U - POE power module and be provided with POE power module's cable - Google Patents
POE power module and be provided with POE power module's cable Download PDFInfo
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- CN204836199U CN204836199U CN201520558825.5U CN201520558825U CN204836199U CN 204836199 U CN204836199 U CN 204836199U CN 201520558825 U CN201520558825 U CN 201520558825U CN 204836199 U CN204836199 U CN 204836199U
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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
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Abstract
The utility model discloses a POE power module and POE electric supply cable. POE power module includes: network transformation unit, signal decomposition is data signal and alternating current signal with the POE network, rectifier unit is right alternating current signal carries out rectified output intermediate signal, detecting element, according to intermediate signal produces feedback signal, will feedback signal passes through network transformation unit and transmits the equipment to PSE to make detecting element and the PSE equipment to shake hands, direct current translation unit will after the completion of shaking hands intermediate signal converts the DC signal that power device was suitable for into. POE electric supply cable includes POE power module, network connection cable and PD equipment connection cable. An its POE power supply function is expanded to ethernet customer end equipment for do not support the POE agreement.
Description
Technical field
The utility model relates to web camera technical field, specifically, relates to a kind of POE supply module and a kind of cable being provided with POE supply module.
Background technology
Power over Ethernet (PowerOverEthernet is called for short POE) technology refers in existing Ethernet wiring architecture, for IP terminal transmission data signal also provides the technology of direct current supply simultaneously.POE system is by feeder ear equipment (PowerSourcingEquipment is called for short PSE) and receiving end equipment (PoweredDevice is called for short PD) two parts composition, and PSE device is that PD equipment is powered.
The web camera (IPcamera is called for short IPC) of current support POE agreement needs integrated PD module in common IP video camera, coming from the POE Signal separator of Ethernet for data-signal and power supply signal.Like this, circuit devcie integrated in PD module causes IPC manufacturing cost to increase.In addition, in common IP video camera, integrated PD module also needs the fabric swatch area taking printed circuit board (PCB) (PrintedCircuitBoard is called for short PCB), causes IPC volume to increase.
Consider above-mentioned reason, economical, miniaturized IPC of the prior art, usually can not integrated PD module owing to being subject to the restriction of structure and cost.But this IPC not supporting POE to power can only depend on in-site installation environment provides power supply, and the restriction by application scenario is larger.
The structure of the network interface power cable that the video camera not supporting POE to power in prior art uses as shown in Figure 1.This cable has data input pin 11a, power input 11b and output 12, and wherein, data input pin 11a is connected with output 12 by wire with power input 11b.Like this, this cable only has the transmission effect of data and power supply.In use, the data input pin 11a of this cable is connected with the network equipment, for receiving data-signal; Power input 11b is connected with external power source, to receive external dc electric energy; Output 12 is connected with the receiving port of video camera, thus is video camera communicated data signal and powers.
Obviously, existing network interface power cable is in fact only plain conductor, can not carry out any process to signal.
Therefore, need a kind of network interface power line badly to come for common IP video camera expansion POE function of supplying power.
Utility model content
One of the purpose of this utility model is to provide a kind of POE supply module, can make the integrated POE function of supplying power of common network interface power cable.
First the utility model provides a kind of POE supply module, comprising:
Network voltage transformation unit, is decomposed into data-signal and AC signal by POE network signal;
Rectification unit, carries out rectification to described AC signal and exports M signal;
Detecting unit, produces feedback signal according to described M signal, described feedback signal is transferred to PSE device by network voltage transformation unit, shakes hands to make detecting unit and PSE device;
DC conversion unit, is converted to the direct current signal that power receiving equipment is suitable for after having shaken hands by described M signal.
In one embodiment, also comprise:
Auxiliary power unit, its input receives external dc power signal, and output is connected with the output of DC conversion unit, with by external dc power signal transmission to the output of DC conversion unit.
In one embodiment, described DC conversion unit comprises:
Switching circuit, generates switching signal based on M signal;
Flyback transformer, is converted to described direct current signal by described M signal under the effect of switching signal.
In one embodiment, described flyback transformer comprises armature winding, secondary winding and is arranged at the auxiliary winding of armature winding side;
Described switching circuit comprises pwm chip and zero cross detection circuit;
Wherein, the inner integrated PWM logic element of pwm chip and switching transistor, PWM logic element output pulse width modulation signal carrys out the grid of driving switch transistor, the drain electrode of switching transistor produces switching signal, armature winding produces pulse voltage according to described switching signal, thus excite the pulse voltage that amplitude reduces on the secondary winding, and then the pulse voltage that amplitude reduces is carried out to filtering and exported described direct current signal;
One end of zero cross detection circuit connects auxiliary winding, and the other end connects the detection pin of pwm chip, and pwm chip is according to the duty ratio of the auxiliary winding voltage adjustment pulse width modulating signal detected.
In one embodiment, described feedback signal comprises detection feedback signal and power classification feedback signal, and the process that detecting unit and PSE device carry out shaking hands comprises detection-phase and power classification stage;
Wherein, in detection-phase, the detection electric current that detecting unit produces described M signal is as detection feedback signal, and POE supply module is identified as based on described detection feedback signal the legitimate device meeting IEEE802.3af agreement by PSE device;
In the power classification stage, the characteristic current that detecting unit produces described M signal is as power classification feedback signal, and PSE device is based on the power grade of described power classification feedback signal identification POE supply module.
The utility model also provides a kind of POE power cable, comprising:
POE supply module, it is arranged in described POE power cable, and described POE supply module comprises: network voltage transformation unit, and POE network signal is decomposed into data-signal and AC signal; Rectification unit, carries out rectification to described AC signal and exports M signal; Detecting unit, produces feedback signal according to described M signal, described feedback signal is transferred to PSE device by network voltage transformation unit, shakes hands to make detecting unit and PSE device; DC conversion unit, is converted to the direct current signal that power receiving equipment is suitable for after having shaken hands by described M signal;
Network connection cable, its one end connects the input of described network voltage transformation unit, and the other end connects Ethernet adaptation module;
PD equipment connection cable, its one end connects the data output end of described network voltage transformation unit and the output of described DC conversion unit, and the other end connects PD device interface module.
In one embodiment, described PD interfacility link cable wrap is drawn together:
PD device data line, its one end connects the data signal output of described network voltage transformation unit, and the other end connects the data terminal of PD device interface module;
PD device power supply (DPS) line, its one end connects the output of described DC conversion unit, and the other end connects the power supply terminal of PD device interface module.
In one embodiment, described POE supply module also comprises:
Auxiliary power unit, its input receives external dc power signal, and output is connected with the output of DC conversion unit, with by external dc power signal transmission to the output of DC conversion unit.
In one embodiment, comprise further:
Auxiliary power supply line, its one end connects the input of described auxiliary power unit, and the other end connects accessory power supply port.
In one embodiment, described DC conversion unit comprises:
Switching circuit, generates switching signal based on M signal;
Flyback transformer, is converted to described direct current signal by described M signal under the effect of switching signal.
In one embodiment, it is characterized in that,
Described flyback transformer comprises armature winding, secondary winding and is arranged at the auxiliary winding of armature winding side;
Described switching circuit comprises pwm chip and zero cross detection circuit;
Wherein, the inner integrated PWM logic element of pwm chip and switching transistor, PWM logic element output pulse width modulation signal carrys out the grid of driving switch transistor, the drain electrode of switching transistor produces switching signal, armature winding produces pulse voltage according to described switching signal, thus excite the pulse voltage that amplitude reduces on the secondary winding, and then the pulse voltage that amplitude reduces is carried out to filtering and exported described direct current signal;
One end of zero cross detection circuit connects auxiliary winding, and the other end connects the detection pin of pwm chip, and pwm chip is according to the duty ratio of the auxiliary winding voltage adjustment pulse width modulating signal detected.
In one embodiment, described feedback signal comprises detection feedback signal and power classification feedback signal, and the process that detecting unit and PSE device carry out shaking hands comprises detection-phase and power classification stage;
Wherein, in detection-phase, the detection electric current that detecting unit produces described M signal is as detection feedback signal, and POE supply module is identified as based on described detection feedback signal the legitimate device meeting IEEE802.3af agreement by PSE device;
In the power classification stage, the characteristic current that detecting unit produces described M signal is as power classification feedback signal, and PSE device is based on the power grade of described power classification feedback signal identification POE supply module.
In one embodiment, comprise further: protective housing, for holding described POE supply module.
The circuit structure of POE supply module of the present utility model is simple, can omitting external MOS circuit module and opto-coupled feedback circuit module, greatly reduces PCB fabric swatch area, is applicable to very much being packaged in wire rod using.
Embodiment of the present utility model adds the sleeve of certain diameter and length between the input and output of common network interface power source combination wire harness, in sleeve, add the circuit board that can realize POE function of supplying power, wire rod line sequence is completely compatible with the network interface power pack zygonema line sequence of money not with POE function.
POE power cable of the present utility model can directly be applied in develop shaping not to be supported in the ethernet client equipment of POE, expands its POE function of supplying power, thus realizes the expansion of product line, save secondary development cost, improving product competitiveness.
Other features and advantages of the utility model will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the utility model.The purpose of this utility model and other advantages realize by structure specifically noted in specification, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for specification, with embodiment of the present utility model jointly for explaining the utility model, does not form restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of network interface power line in prior art;
Fig. 2 is the structural representation of the POE power cable of the embodiment of the present application one;
Fig. 3 is the structured flowchart of the POE supply module of the embodiment of the present application one;
Fig. 4 is the electrical block diagram of the DC conversion unit of the embodiment of the present application two.
Embodiment
Describe execution mode of the present utility model in detail below with reference to drawings and Examples, to the utility model, how application technology means solve technical problem whereby, and the implementation procedure reaching relevant art effect can fully understand and implement according to this.Each feature in the embodiment of the present application and embodiment, can be combined with each other under not afoul prerequisite, the technical scheme formed is all within protection range of the present utility model.
The application provides a kind of network interface power line of built-in POE supply module, to the ethernet client expansion POE function not possessing POE function of supplying power, do not affect existing ethernet client main body hardware and structure.For non-POE ethernet client, only existing network interface power line need be replaced with the novel power cable that the utility model provides, the switching of non-POE client device and POE client device can be realized.
It should be noted that, only be described using web camera IPC as client device example in the embodiment of the present application, be not limited thereto, the novel power cable that the present embodiment provides is equally applicable to other client devices of POE system, as IP phone, AP, palmtop PC (PDA) or charger for mobile phone etc.
embodiment one
Fig. 2 is the structural representation of the POE power cable of the present embodiment.As shown in Figure 2, this cable mainly comprises network connection cable 210, POE supply module 220 and PD equipment connection cable 230.
Power cable in the present embodiment can use under POE powering mode and non-POE powering mode.
pOE powering mode
Under POE powering mode, network connection cable 210 is connected with the PSE device in POE system, POE supply module 220 extracts data-signal and DC power signal from the POE signal meeting IEEE802.3af agreement, PD equipment connection cable 230 and PD equipment connection, provide DC power supply to PD equipment.Wherein, PD equipment is the ethernet client equipment not supporting IEEE802.3af agreement.
Fig. 3 is the structured flowchart of POE supply module 220.As shown in Figure 3, POE supply module 220 mainly comprises network voltage transformation unit 221, rectification unit 222, detecting unit 223 and DC conversion unit 224.
Network voltage transformation unit 221 has input 221a, for receiving POE signal.Network voltage transformation unit 221 is also provided with data output end 221b and power output end 221c.POE network signal is decomposed into data-signal and AC signal by network voltage transformation unit 221, and on data output end 221b outputting data signals, output AC signal on power output end 221c.
The input of rectification unit 222 is connected with the power output end 221c of network voltage transformation unit 221, exports M signal for carrying out rectification process to AC signal.
Detecting unit 223 is connected with the output of rectification unit 222, and detecting unit 223 produces feedback signal according to M signal, feedback signal is transferred to PSE device by network voltage transformation unit, shakes hands with PSE device.Wherein, feedback signal comprises detection feedback signal and power classification feedback signal.
Specifically, the process that detecting unit and PSE device carry out shaking hands comprises detection-phase and power classification stage.First, in detection-phase, detecting unit 223 identifies the less level signal that PSE device exports, produce based on the featured resistance of self under the effect of this level signal and detect electric current, using this detection electric current as detection feedback signal, POE supply module 220 is identified as based on detection feedback signal the legal PD equipment meeting IEEE802.3af agreement to make PSE device.Subsequently, in the power classification stage, produce characteristic current under the hierarchical detection level effect that detecting unit 223 exports in PSE device, using this characteristic current as power classification feedback signal, PSE device is based on the power grade of power classification feedback signal identification POE supply module.After detection and classification complete, POE supply module 220 and PSE device complete shakes hands.In power supply process subsequently, PSE device provides the intermediate dc power supply signal of 48V to PD equipment.
As shown in Figure 3, DC conversion unit 224 has input 224a and output 224b, and the input 224a of DC conversion unit is connected with the output of rectification unit 222.In detecting unit 223 completes the power supply process after shaking hands, the 48V intermediate dc power supply signal that rectification unit 222 exports by DC conversion unit 224 is converted to the 12V direct current signal that power receiving equipment is suitable for, and exports this direct current signal on output 224b.
Under POE powering mode, the input 221a of one end interconnection network voltage transformation unit 221 of network connection cable 210, the other end connects Ethernet adaptation module 210a, thus POE Signal transmissions PSE device produced is to network voltage transformation unit 221, extracts data-signal and DC power signal.
Ethernet adaptation module 210a is RJ45 port, 8 twisted-pair feeders in 8 twisted-pair feeders cable 210 connected to the network wherein connect correspondingly, and the input 221a of interconnection network voltage transformation unit 221,1,2,3,6 data wires and 4,5,7,8 idle lines can be supported to power two kinds of supply power modes.
The data output end 221b of one end interconnection network voltage transformation unit 221 of PD equipment connection the cable 230 and output 224b of DC conversion unit, the other end connects PD device interface module 230a, provides data-signal and DC power signal to PD equipment.
In a preferred example, PD equipment is web camera IPC, establishes 6 heart yearns to plate end socket (male) in it, its corresponding, PD device interface module 230a is configured to 6 core glue shells socket (female), has D1 to D6 totally 6 splicing ears.PD equipment connection cable 230 comprises PD device data line and PD device power supply (DPS) line.Wherein, PD device data line comprises 4 twisted-pair feeders, the data signal output 221b of one end interconnection network voltage transformation unit of PD device data line, and the other end connects the data terminal D1 to D4 of PD device interface module.PD device power supply (DPS) line comprises 2 twisted-pair feeders, and one end of PD device power supply (DPS) line connects the output 224b of DC conversion unit, and the other end connects the power supply terminal D5 to D6 of PD device interface module.Thus the data-signal extracted from POE signal is transferred to PD equipment by data terminal D1 to D4, and the DC power signal decomposed from POE signal is supplied to PD equipment by power supply terminal D5 to D6.
non-POE powering mode
Again get back to Fig. 2, the POE power cable of the present embodiment also comprises auxiliary power supply line 240, connects outside 12V DC power supply, under non-POE powering mode for PD equipment provides power supply.
Under non-POE powering mode, network connection cable 210 with do not support that the ethernet switching device of IEEE802.3af agreement is connected, POE supply module 210 only forwards data-signal.Specifically, network voltage transformation unit 221 is outputting data signals on data output end 221b, and does not have power supply signal to export on power output end 221c.Like this, rectification unit 222, detecting unit 223 and DC conversion unit 224 do not work, and need by auxiliary power supply line 240 for PD equipment provides extra DC power supply.
Correspondingly, as shown in Figure 3, POE supply module 220 also comprises auxiliary power unit 225, and its input 225a receives external dc power signal, and output 225b is connected with the output 224b of DC conversion unit.In fig. 2, one end of auxiliary power supply line 240 connects the input 225a of auxiliary power unit, the other end connects accessory power supply port, and then by external dc power signal transmission to the output 224b of DC conversion unit, and be supplied to PD equipment by power supply terminal D5 to D6.
From technique scheme, the present embodiment is equivalent to expand by the function of POE supply module by common network interface power line, and it is easy to install, do not affect the hardware capability of non-POE client device, same client device only need switch the switching that network interface power line material just can realize POE type and non-POE.
When network inputs the network signal not with POE function, POE power cable is transmission effect to network signal.When input is the network signal of band POE function, the exportable DC12V of POE power cable and network signal, thus the input of DC12V power supply can be saved.In addition, if when POE network signal and outside DC12V power supply input, also can not cause any interference simultaneously.
In order to meet the demand of the airtight and water proofing property of wire design, POE power cable arranges protective housing 250 for holding POE supply module 220.This protective housing is preferably designed for columnar sleeve.This cover tube length 80mm, diameter 18.5mm, be manufactured on POE supply module 220 on one piece of minitype circuit board, and be arranged in sleeve 250.
embodiment two
The following particular circuit configurations that DC conversion unit 224 is described according to Fig. 4.DC conversion unit comprises flyback transformer 410 and switching circuit 420.The M signal that switching circuit 420 produces based on rectification unit generates switching signal, and intermediate dc power supply signal is converted to direct current signal by flyback transformer 410 under the effect of switching signal.
The circuit structure of the DC conversion unit 224 provided in the present embodiment is simple, can omitting external MOS circuit module, opto-coupled feedback circuit module, greatly reduces PCB fabric swatch area, is applicable to very much being packaged in wire rod using.
As shown in Figure 4, flyback transformer 410 comprises armature winding, secondary winding and is placed in the auxiliary winding of armature winding side.
The input (No. 2 ends) of armature winding is configured to the input Vi of DC conversion unit 224, is connected to rectification unit, receives the 48V intermediate dc signal that rectification unit produces.Output (No. 1 end) the connecting valve circuit 420 of armature winding, control the voltage on armature winding according to switching signal, when this switching signal is closed, a flyback voltage reflexes to secondary winding and auxiliary winding from armature winding.
One end (No. 5 ends) of secondary winding connects the anode of output diode DP1, and the negative electrode of output diode DP1 is connected to the output end vo of DC conversion unit 224.The other end (No. 6 ends) connecing secondary winding connects one end of output capacitance CP4, and the other end of output capacitance CP4 connects the negative electrode of output diode DP1.The 12V direct voltage that output capacitance CP4 is used for exporting carries out filtering.
One end (No. 3 ends) of auxiliary winding connects reference level HGND, and the other end (No. 4 ends) connecting valve circuit 420, provides feedback voltage V s to switching circuit.
In the present embodiment, switching circuit 420 is realized by PWM controller SY6177FAC and peripheral circuit thereof.Because in the embodiment of the application, POE supply module is integrated in power cable, require that circuit has higher integrated level, take less volume.And in SY6177FAC, be integrated with PWM control element and MOS element, and can peripheral circuits.
Specifically, switching circuit 420 mainly comprises pwm chip (SY6177FAC) and zero cross detection circuit.Wherein, the inner integrated PWM logic element of pwm chip and switching transistor (metal-oxide-semiconductor), PWM logic element output pulse width modulation signal carrys out the grid of driving switch transistor, the drain electrode of switching transistor produces switching signal, pulse voltage is produced for controlling armature winding, excite the pulse voltage that amplitude reduces on the secondary winding, export the applicable low-voltage DC source signal of power receiving equipment by filter circuit.
As shown in Figure 4, the input pin (DR) of SY6177FAC chip is the drain electrode of metal-oxide-semiconductor in sheet, connects the output (No. 1 end) of flyback transformer 410 armature winding.SY6177FAC adopts output current former limit regulation technology, and metal-oxide-semiconductor is controlled by inner PWM logic element, and the drain electrode of metal-oxide-semiconductor produces switching signal.When metal-oxide-semiconductor conducting, electric current in armature winding, is had to flow through, when metal-oxide-semiconductor ends, the current interruptions of armature winding, thus control armature winding break-make.The pulse width modulating signal that PWM logic element exports determines the ON time length of metal-oxide-semiconductor.Armature winding produces pulse voltage, secondary winding can be excited to produce the pulse voltage of amplitude reduction, this pulse voltage, after the filter circuit be made up of output capacitance CP4 and diode DP1 carries out filtering, exports the low pressure 12V DC power signal that power receiving equipment is suitable for.
Output pin (GND) ground connection (herein isolating with the ground of flyback transformer secondary winding) of SY6177FAC chip.
In the diagram, RP11 and RP14 forms zero cross detection circuit.In zero cross detection circuit, one end of RP14 and one end of RP11 are connected the detection pin (ZCS) of SY6177FAC chip jointly, the other end ground connection (HGND) of RP14, and the other end of RP11 connects No. 4 ends of auxiliary winding.
Flyback transformer of the prior art usually arranges opto-coupled feedback circuit module and the output voltage of secondary limit winding is fed back to pwm chip, and opto-coupled feedback circuit module in the present embodiment, can be saved, the voltage of auxiliary winding is utilized to realize zero passage detection, auxiliary winding voltage Vs and internal reference voltage compare by SY6177FAC chip, the duty ratio of pulse width modulating signal is adjusted, to keep time voltage constant of limit winding output according to the auxiliary winding voltage Vs detected.
In addition, one end of sampling resistor RP12 is connected with the current feedback pin (ISEN) of switch chip, other end ground connection.PWM logic element completes current sample by sampling resistor RP12, the duty ratio of adjustment pwm signal, and realizes overcurrent protection.
Resistance RP10 and electric capacity CP12 is composed in series RC compensating circuit, and one end of resistance RP10 is connected with the compensation pins (COMP) of switch chip, and electric capacity CP12 connects GND.Compensation circuit is used for stability contorting closed loop, to realize fast transient response.
In the present embodiment, SY6177FAC is a PWM controller that can strengthen flyback transformer performance.This chip internal is integrated with the withstand voltage triode (MOSFET) of a 200V, without the need to external metal-oxide-semiconductor, saves the physical size of switching circuit 420.SY6177FAC, by former limit control technology adjustment voltage and current, is applicable to the application of low cost.In order to reach higher efficiency and better EMI performance, SY6177FAC drives flyback transformer 410 to be operated in quasi-resonance state.
Can be found out by above scheme, SY6177FAC resolution circuitry structure is simple, can omitting external MOS circuit module, opto-coupled feedback circuit module, saves volume and resource, greatly reduces PCB fabric swatch area.
Technical staff in any the utility model art; under the prerequisite not departing from spirit and scope disclosed in the utility model; any amendment and change can be done what implement in form and in details; but scope of patent protection of the present utility model, the scope that still must define with appending claims is as the criterion.
Claims (13)
1. a POE supply module, comprising:
Network voltage transformation unit, is decomposed into data-signal and AC signal by POE network signal;
Rectification unit, carries out rectification to described AC signal and exports M signal;
Detecting unit, produces feedback signal according to described M signal, described feedback signal is transferred to PSE device by network voltage transformation unit, shakes hands to make detecting unit and PSE device;
DC conversion unit, is converted to the direct current signal that power receiving equipment is suitable for after having shaken hands by described M signal.
2. POE supply module as claimed in claim 1, is characterized in that, also comprise:
Auxiliary power unit, its input receives external dc power signal, and output is connected with the output of DC conversion unit, with by external dc power signal transmission to the output of DC conversion unit.
3. POE supply module as claimed in claim 1 or 2, it is characterized in that, described DC conversion unit comprises:
Switching circuit, generates switching signal based on M signal;
Flyback transformer, is converted to described direct current signal by described M signal under the effect of switching signal.
4. POE supply module as claimed in claim 3, is characterized in that,
Described flyback transformer comprises armature winding, secondary winding and is arranged at the auxiliary winding of armature winding side;
Described switching circuit comprises pwm chip and zero cross detection circuit;
Wherein, the inner integrated PWM logic element of pwm chip and switching transistor, PWM logic element output pulse width modulation signal carrys out the grid of driving switch transistor, the drain electrode of switching transistor produces switching signal, armature winding produces pulse voltage according to described switching signal, thus excite the pulse voltage that amplitude reduces on the secondary winding, and then the pulse voltage that amplitude reduces is carried out to filtering and exported described direct current signal;
One end of zero cross detection circuit connects auxiliary winding, and the other end connects the detection pin of pwm chip, and pwm chip is according to the duty ratio of the auxiliary winding voltage adjustment pulse width modulating signal detected.
5. POE supply module as claimed in claim 1, is characterized in that, described feedback signal comprises detection feedback signal and power classification feedback signal, and the process that detecting unit and PSE device carry out shaking hands comprises detection-phase and power classification stage;
Wherein, in detection-phase, the detection electric current that detecting unit produces described M signal is as detection feedback signal, and POE supply module is identified as based on described detection feedback signal the legitimate device meeting IEEE802.3af agreement by PSE device;
In the power classification stage, the characteristic current that detecting unit produces described M signal is as power classification feedback signal, and PSE device is based on the power grade of described power classification feedback signal identification POE supply module.
6. a POE power cable, comprising:
POE supply module, it is arranged in described POE power cable, and described POE supply module comprises: network voltage transformation unit, and POE network signal is decomposed into data-signal and AC signal; Rectification unit, carries out rectification to described AC signal and exports M signal; Detecting unit, produces feedback signal according to described M signal, described feedback signal is transferred to PSE device by network voltage transformation unit, shakes hands to make detecting unit and PSE device; DC conversion unit, is converted to the direct current signal that power receiving equipment is suitable for after having shaken hands by described M signal;
Network connection cable, its one end connects the input of described network voltage transformation unit, and the other end connects Ethernet adaptation module;
PD equipment connection cable, its one end connects the data output end of described network voltage transformation unit and the output of described DC conversion unit, and the other end connects PD device interface module.
7. POE power cable as claimed in claim 6, it is characterized in that, described PD interfacility link cable wrap is drawn together:
PD device data line, its one end connects the data signal output of described network voltage transformation unit, and the other end connects the data terminal of PD device interface module;
PD device power supply (DPS) line, its one end connects the output of described DC conversion unit, and the other end connects the power supply terminal of PD device interface module.
8. POE power cable as claimed in claim 7, it is characterized in that, described POE supply module also comprises:
Auxiliary power unit, its input receives external dc power signal, and output is connected with the output of DC conversion unit, with by external dc power signal transmission to the output of DC conversion unit.
9. POE power cable as claimed in claim 8, is characterized in that, comprise further:
Auxiliary power supply line, its one end connects the input of described auxiliary power unit, and the other end connects accessory power supply port.
10. the POE power cable according to any one of claim 6-9, is characterized in that, described DC conversion unit comprises:
Switching circuit, generates switching signal based on M signal;
Flyback transformer, is converted to described direct current signal by described M signal under the effect of switching signal.
11. POE power cables as claimed in claim 10, is characterized in that,
Described flyback transformer comprises armature winding, secondary winding and is arranged at the auxiliary winding of armature winding side;
Described switching circuit comprises pwm chip and zero cross detection circuit;
Wherein, the inner integrated PWM logic element of pwm chip and switching transistor, PWM logic element output pulse width modulation signal carrys out the grid of driving switch transistor, the drain electrode of switching transistor produces switching signal, armature winding produces pulse voltage according to described switching signal, thus excite the pulse voltage that amplitude reduces on the secondary winding, and then the pulse voltage that amplitude reduces is carried out to filtering and exported described direct current signal;
One end of zero cross detection circuit connects auxiliary winding, and the other end connects the detection pin of pwm chip, and pwm chip is according to the duty ratio of the auxiliary winding voltage adjustment pulse width modulating signal detected.
12. POE power cables as claimed in claim 6, is characterized in that, described feedback signal comprises detection feedback signal and power classification feedback signal, and the process that detecting unit and PSE device carry out shaking hands comprises detection-phase and power classification stage;
Wherein, in detection-phase, the detection electric current that detecting unit produces described M signal is as detection feedback signal, and POE supply module is identified as based on described detection feedback signal the legitimate device meeting IEEE802.3af agreement by PSE device;
In the power classification stage, the characteristic current that detecting unit produces described M signal is as power classification feedback signal, and PSE device is based on the power grade of described power classification feedback signal identification POE supply module.
13. POE power cables as claimed in claim 6, is characterized in that, comprise further: protective housing, for holding described POE supply module.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520558825.5U CN204836199U (en) | 2015-07-29 | 2015-07-29 | POE power module and be provided with POE power module's cable |
| PCT/CN2016/084480 WO2017016314A1 (en) | 2015-07-29 | 2016-06-02 | Power over ethernet (poe) power sourcing module and cable configured with poe power sourcing module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520558825.5U CN204836199U (en) | 2015-07-29 | 2015-07-29 | POE power module and be provided with POE power module's cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204836199U true CN204836199U (en) | 2015-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520558825.5U Active CN204836199U (en) | 2015-07-29 | 2015-07-29 | POE power module and be provided with POE power module's cable |
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| WO (1) | WO2017016314A1 (en) |
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Effective date of registration: 20230804 Address after: No.555, Qianmo Road, Binjiang District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Hikvision Digital Technology Co.,Ltd. Patentee after: Jiangsu Tongbao Intelligent Transportation Technology Co.,Ltd. Address before: No. 555, Qianmo Road, Binjiang District, Hangzhou, Zhejiang 310000 Patentee before: Hangzhou Hikvision Digital Technology Co.,Ltd. |