CN105357017B - Stablize the system and method for POE supply voltages - Google Patents
Stablize the system and method for POE supply voltages Download PDFInfo
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- CN105357017B CN105357017B CN201510787120.5A CN201510787120A CN105357017B CN 105357017 B CN105357017 B CN 105357017B CN 201510787120 A CN201510787120 A CN 201510787120A CN 105357017 B CN105357017 B CN 105357017B
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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
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Abstract
The present invention relates to POE to supply electrical domain more particularly to a kind of system and method for stable POE supply voltages.Applied to based on POE technologies, supply voltage of the Power Source Equipment to terminal power receiving equipment is adjusted, detects receiving voltage module and being connect by electric module in the terminal power receiving equipment, by the voltage of electric module described in detecting real-time, generates detecting data；Power receiving equipment CPU is connect with the detecting receiving voltage module, is exported after handling the detecting data；Power supply unit CPU is connect with the power receiving equipment CPU, receives treated the detecting data, and treated that detecting data is further processed to described, generates control signal；Power supply of the feedback regulation module respectively with the power supply unit CPU, Power Source Equipment is connect, and the supply voltage of the power supply is adjusted according to the control signal.
Description
Technical field
The present invention relates to POE to supply electrical domain more particularly to a kind of system and method for stable POE supply voltages.
Background technology
POE (Power Over Ethernet) be it is a kind of using cable to rear end equipment transmission data and simultaneously power supply
Technology makes rear end power receiving equipment (abbreviation PD：Power Device) it does not need to be additionally provided power and can work.As shown in Figure 1,
End equipment power (referred to as：PSE, Power Sourcing Equipment) wherein two pairs of 4 pairs of lines of transmission are originally used in net
The voltage that mouth transformer rear end adds 48V is realized to distal end PD power supplies.Currently used POE system is as shown in Fig. 2, more than one
Mouthful POE interchangers rear end can the multiple PD equipment of carry, but the PSE power supplys for PD power supplies inside the interchanger only there are one, institute
There is power supply network interface to share.
But in above-mentioned method of supplying power to, voltage loss and the work of a large amount of PD equipment on cable inevitably result in
The voltage instability of PSE power supplies or decline are stablized so as to influence system.There is no detect voltage from PD ends by traditional POE
Feedback, to prevent on line, using generation pressure drop, voltage design can be 53.5V in design by PSE power supplys, be higher than for loss and PD ends
Representative value 48V is removed estimate pressure drop on cable in this way, and the voltage that PD equipment ends receive is close to 48V, but due to line length and resistance
The receiving voltage of anti-different PD is simultaneously inaccurate, and PSE ends cannot know the receiving voltage of PD and adjust in real time.Using this
Mode is not fed back, and the voltage being lost on cable cannot be calculated accurately, therefore the voltage that PD is received is inaccurate.
Invention content
In view of the defects existing in the prior art, the present invention will introduce a kind of system and method for stable POE supply voltages, will
Detecting voltage and feedback regulation techniques apply in POE electric power systems, can accurately realize the stabilization of PD ends power supply.
The present invention adopts the following technical scheme that：
A kind of system of stable POE supply voltages, applied to based on POE technologies, adjust Power Source Equipment to terminal by
The supply voltage of electric equipment, the terminal power receiving equipment include：
Detect receiving voltage module, and being connect by electric module in the terminal power receiving equipment, by electricity described in detecting real-time
The voltage of module generates detecting data；
Power receiving equipment CPU connect with the detecting receiving voltage module, is exported after handling the detecting data；
The Power Source Equipment includes：
Power supply unit CPU is connect with the power receiving equipment CPU, receives treated the detecting data, and to the place
Detecting data after reason is further processed, and generates control signal；
Feedback regulation module, respectively the power supply with the power supply unit CPU, Power Source Equipment connect, according to institute
Control signal is stated the supply voltage of the power supply is adjusted.
Preferably, the detecting receiving voltage module includes：
Multiple comparators, the forward end or negative end of the comparator input a reference voltage, and the comparator is opposite
The voltage obtained described in forward end or negative end input detecting by electric module, the output terminal of the comparator and the power receiving equipment
CPU connections export the detecting data to the power receiving equipment CPU.
Preferably, the detecting receiving voltage module further includes：
The forward end and/or negative end of the comparator are connect by diode with described by electric module；Also,
The forward end and/or negative end of the comparator and described one or more voltage stabilizings are also associated between by electric module
Resistance.
Preferably, the feedback regulation module includes：
Multiple feedback resistances are connect with the power supply of the Power Source Equipment,
Multiple metal-oxide-semiconductors, the source electrode of the metal-oxide-semiconductor or drain electrode are connect respectively with all or part in the feedback resistance,
And the grid of the metal-oxide-semiconductor is connect with the power supply unit CPU；And
The power supply unit CPU generates the conducting and cut-off that control signal controls the multiple metal-oxide-semiconductor, so as to change access
The feedback regulation mould feedback resistance value in the block.
Preferably, the feedback regulation module includes：
Power supply chip is connect by the feedback resistance with the power supply of the power supply unit, is the feedback regulation module
Operation provide electric energy.
Preferably, it is connected between the Power Source Equipment and the terminal power receiving equipment by wirelessly or non-wirelessly cable.
A kind of method of stable POE supply voltages, the method includes：
Power receiving equipment starts by electricity, detects in the power receiving equipment by the voltage of electric module, generates detecting data；
Judge whether to need to adjust according to the detecting data, if desired adjust, the detecting data is input to by electricity
It is handled in equipment CPU, the detecting data of processing is input to power supply unit CPU later is further processed, and generates control letter
Number；
The supply voltage of the power supply is adjusted according to the control signal.
Preferably, in the method,
By the forward end or negative end of the control source of detecting to comparator, the comparator is by the voltage and benchmark of detecting
Voltage compares, and obtains detecting data.
Preferably, in the method,
The grid of metal-oxide-semiconductor accesses the control signal, and the control signal controls the conducting and cut-off of the metal-oxide-semiconductor；
The conducting of the metal-oxide-semiconductor accesses the feedback resistance value of the power supply with cut-off control, so as to adjust the confession
The supply voltage of power supply.
Preferably, the method further includes,
Judge whether to need to adjust according to the detecting data, if not needing to adjust, continue to detect the power receiving equipment
In by electric module voltage.
The beneficial effects of the invention are as follows：
The feedback information of PD equipment in distal end of the present invention is not needed to additionally be laid with cable, be reduced by original network cable transmission
Application cost, and the detecting of voltage is automatically performed by PD, very long feeder line is not needed to, the voltage value of feedback can be more smart
Really.
Description of the drawings
Fig. 1 is the POE power supply the principle figures of the prior art；
Fig. 2 is the structure diagram of the electric power system of prior art POE；
Fig. 3 is POE voltage designs figure in the prior art；
Fig. 4 is a kind of structure diagram of the system of stable POE supply voltages of the present invention；
Fig. 5 is the voltage detection circuit connection figure of PD of the present invention；
Fig. 6 is logical signal table of the detecting data of the present invention with detecting voltage；
Fig. 7 is the connection figure of the feedback regulating circuit of PSE of the present invention；
Fig. 8 is the corresponding table between present invention control signal and feedback voltage；
Fig. 9 is a kind of schematic diagram of the method for stable POE supply voltages of the present invention.
Specific embodiment
It should be noted that in the absence of conflict, following technical proposals can be combined with each other between technical characteristic.
The specific embodiment of the present invention is further described below in conjunction with the accompanying drawings：
The present embodiment, which will voluntarily be detected and be returned using a kind of PD ends, compares numerical value, and PSE ends are according to return value adjust automatically
Technology, the structure diagram of the present embodiment is as shown in figure 4, since it employs feedback and adjustment, the voltage value that PD ends receive
Will be closer to standard value, such as 48V, voltage value are also more accurate.
Mainly include PSE device and PD equipment in the present embodiment, carried out between PSE device and PD equipment using POE technologies
Power supply, PD equipment introduce the circuit (detecting receiving voltage module) of detecting receiving voltage, and PD equipment can obtain one and benchmark
The value that voltage compares feeds back to PSE device and adjusts.
Increase a feedback regulating circuit (feedback regulation module) in PSE device, the power supply unit CPU in PSE receives PD
The feedback information of power receiving equipment CPU in equipment can do the adjusting of superpressure or decompression.
Feedback in PD equipment in the present embodiment adjusts circuit using Zener diode, logic comparator composition detecting voltage
Network judges current voltage and exports logic low and high level.PD detecting receiving voltage circuit diagrams in the present embodiment, such as Fig. 5 institutes
Show, U1 and U2 is comparator, and principle is to compare two voltage values of input terminal and export logical value 0 or 1, the positive termination of U1
Enter reference voltage, the negative end of U2 equally accesses reference voltage, the negative end of U1 and the forward end of U2 with by electric module (PD by
Electric module) connection, detect the voltage by electric module；VIN is that PD is received and needed the voltage detected, i.e., by the voltage of electric module,
Can be divided by electric module.D1, D2, D3 are Zener diodes, and C1 is filter capacitor.R1~R7 is divider resistance.In Fig. 5
GPIO1, GPIO2 be connected to by electric two GPIO of CPU.
The formula that the reference voltage V ref of two comparators can be calculated by electric resistance partial pressure is：
Vref=D1 × R3/ (R2+R3)；
2pin (negative end) voltage of U1 is：
V_U1=(VIN-D2) × R4/ (R4+R5)；
1pin (forward end) voltage of U2：
V_U2=(VIN-D3) × R6/ (R6+R7)；
As shown in fig. 6, therefore deduce that when VIN voltage is in some range, the GPIO1 of powered device PD and
GPIO2 is just like output shown in fig. 6.
Power supply unit PSE is connected using the feedback resistance in the GPIO output control signal control feedback networks for the CPU that powers
And it is in parallel, realize the change adjustment output voltage of feedback parameter.The feedback regulating circuit of PSE in the present embodiment as shown in fig. 7,
FB is the feedback voltage pin of power supply chip, usually a fixed voltage value, in the present embodiment, the FB for the chip that can be selected
Terminal voltage is VFB=3V.Then the formula of the output voltage VO UT of feedback regulating circuit (feedback regulation module) is：
VOUT=VFB×(R1+R2)/R2
It is adjusted in the feedback network of power supply chip using multistage, R1, R2 are the initial feedback parameters of chip, the power supply of PSE
CPU can to Q1~Q4 as shown in Figure 7, this 4 metal-oxide-semiconductors carry out cut-offfing control with 4 GPIO, and R1 and R2 will be because in parallel other
Resistance changes feedback network.When GPIO outputs are different, the adjustment of feedback network can obtain the output as shown in the table of Fig. 8
Voltage VOUT.
For the working method of system as shown in figure 9, PD is starting to work after by electricity, voltage detection circuit starts detection by electricity
Voltage, and the GPIO0 and GPIO1 for passing through PD itself detect current state, the CPU of PD can be judged according to the value of reception,
If the value of the GPIO0 and GPIO1 of PD is (0,0), voltage is meant that in zone of reasonableness, and circuit for detecting continues to detect, when value is
(1,0), PD can judge that current voltage is relatively low, send this information to PSE, the CPU of PSE can to the GPIO3 and GPIO4 of PSE into
Row adjusts (ascending to adjust step by step) output voltage again, and then PD is detected again by electricity, until judging that receiving voltage is closing
In the range of reason only.Similarly, when value is (0,1), PD can judge that current voltage is higher, send this information to PSE, PSE can be right
The GPIO1 and GPIO2 of PSE itself is adjusted (ascending step by step adjust) output voltage again, then PD detect again by
Electricity, until judging that receiving voltage stops in the reasonable scope.
In conclusion the feedback information of PD equipment in distal end of the present invention does not need to additionally be laid with by original network cable transmission
Cable reduces application cost, and the detecting of voltage is automatically performed by PD, does not need to very long feeder line, the voltage of feedback
Value can be more accurate.
By explanation and attached drawing, the exemplary embodiments of the specific structure of specific embodiment are given, based on essence of the invention
God can also make other conversions.Although foregoing invention proposes existing preferred embodiment, however, these contents are not intended as
Limitation.
For a person skilled in the art, after reading above description, various changes and modifications undoubtedly will be evident.
Therefore, appended claims should regard the whole variations and modifications of true intention and range for covering the present invention as.It is weighing
The range and content of any and all equivalence, are all considered as still belonging to the intent and scope of the invention in the range of sharp claim.
Claims (8)
1. a kind of system of stable POE supply voltages, which is characterized in that based on POE technologies, adjust Power Source Equipment to terminal
The supply voltage of power receiving equipment, the terminal power receiving equipment include：
Detect receiving voltage module, and being connect by electric module in the terminal power receiving equipment, by electric module described in detecting real-time
Voltage, generate detecting data；
Power receiving equipment CPU connect with the detecting receiving voltage module, is exported after handling the detecting data；
The Power Source Equipment includes：
Power supply unit CPU is connect with the power receiving equipment CPU, receives treated the detecting data, and to the processing after
Detecting data be further processed, generate control signal；
Feedback regulation module, respectively the power supply with the power supply unit CPU, Power Source Equipment connect, according to the control
The supply voltage of the power supply is adjusted in signal processed；
The detecting receiving voltage module includes：
Multiple comparators, the forward end or negative end of the comparator input a reference voltage, the opposite forward direction of the comparator
The voltage obtained described in end or negative end input detecting by electric module, the output terminal of the comparator and the power receiving equipment CPU
Connection, the detecting data is exported to the power receiving equipment CPU.
2. the system of stable POE supply voltages according to claim 1, which is characterized in that the detecting receiving voltage mould
Block further includes：
The forward end and/or negative end of the comparator are connect by diode with described by electric module；Also,
The forward end and/or negative end of the comparator and described one or more voltage stabilizings electricity is also associated between by electric module
Resistance.
3. the system of stable POE supply voltages according to claim 1, which is characterized in that the feedback regulation module packet
It includes：
Multiple feedback resistances are connect with the power supply of the Power Source Equipment,
Multiple metal-oxide-semiconductors, the source electrode of the metal-oxide-semiconductor or drain electrode are connect respectively with all or part in the feedback resistance, and
The grid of the metal-oxide-semiconductor is connect with the power supply unit CPU；And
The power supply unit CPU generates the conducting and cut-off that control signal controls the multiple metal-oxide-semiconductor, so as to change described in access
Feedback regulation mould feedback resistance value in the block.
4. the system of stable POE supply voltages according to claim 3, which is characterized in that the feedback regulation module packet
It includes：
Power supply chip is connect by the feedback resistance with the power supply of the power supply unit, is the fortune of the feedback regulation module
Row provides electric energy.
5. the system of stable POE supply voltages according to claim 1, which is characterized in that the Power Source Equipment with
It is connected between the terminal power receiving equipment by wirelessly or non-wirelessly cable.
A kind of 6. method of stable POE supply voltages, which is characterized in that the method includes：
Power receiving equipment starts by electricity, detects in the power receiving equipment by the voltage of electric module, generates detecting data；
Judge whether to need that the supply voltage of power supply is adjusted according to the detecting data, if desired adjust, by institute
It states detecting data and is input in power receiving equipment CPU and handle, the detecting data of processing is input to power supply unit CPU into traveling later
The processing of one step generates control signal；
The supply voltage of the power supply is adjusted according to the control signal；
In the method,
By the forward end or negative end of the control source of detecting to comparator, the comparator is by the voltage and reference voltage of detecting
Compare, obtain detecting data；
The forward end and/or negative end of the comparator are connect by diode with described by electric module.
7. the method for stable POE supply voltages according to claim 6, which is characterized in that in the method, metal-oxide-semiconductor
Grid accesses the control signal, and the control signal controls the conducting and cut-off of the metal-oxide-semiconductor；The conducting of the metal-oxide-semiconductor with
Cut-off control accesses the feedback resistance value of the power supply, so as to adjust the supply voltage of the power supply；
The source electrode of the metal-oxide-semiconductor or drain electrode are connect respectively with all or part in the feedback resistance, and the metal-oxide-semiconductor
Grid is connect with the power supply unit CPU.
8. the method for stable POE supply voltages according to claim 6, which is characterized in that the method further includes,
Judge whether to need that the supply voltage of power supply is adjusted according to the detecting data, if not needing to adjust,
Continue to detect in the power receiving equipment by the voltage of electric module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510787120.5A CN105357017B (en) | 2015-11-16 | 2015-11-16 | Stablize the system and method for POE supply voltages |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510787120.5A CN105357017B (en) | 2015-11-16 | 2015-11-16 | Stablize the system and method for POE supply voltages |
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| CN105357017A CN105357017A (en) | 2016-02-24 |
| CN105357017B true CN105357017B (en) | 2018-06-19 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130742A (en) * | 2016-08-30 | 2016-11-16 | 杭州华三通信技术有限公司 | Equipment method of supplying power to based on POE system and device |
| CN106487523A (en) * | 2016-09-08 | 2017-03-08 | 上海斐讯数据通信技术有限公司 | A kind of voltage feedback method of network power supply and Voltage Feedback system |
| CN106899415A (en) * | 2017-04-28 | 2017-06-27 | 上海斐讯数据通信技术有限公司 | It is a kind of to utilize the two POE mouthfuls system and method for common power supply |
| CN106972936A (en) * | 2017-04-28 | 2017-07-21 | 上海斐讯数据通信技术有限公司 | A kind of system and method for adjustable POE supply voltages |
| CN107257286A (en) * | 2017-05-19 | 2017-10-17 | 上海斐讯数据通信技术有限公司 | A kind of verification expression POE electric power systems, method and control system |
| CN109597453A (en) * | 2017-09-30 | 2019-04-09 | 华为技术有限公司 | Power supply energy-saving method, power supply unit and power receiving equipment |
| TWI649982B (en) * | 2017-12-08 | 2019-02-01 | 和碩聯合科技股份有限公司 | Ethernet power supply |
| CN109921914B (en) * | 2019-04-12 | 2021-04-06 | 上海剑桥科技股份有限公司 | POE equipment |
| CN110365495B (en) * | 2019-07-03 | 2021-07-30 | 普联技术有限公司 | PoE power receiving method, device and system |
| CN112422298B (en) * | 2020-10-21 | 2022-10-18 | 武汉虹信科技发展有限责任公司 | POE power supply device, method and system |
| CN113194586B (en) * | 2021-04-23 | 2023-04-25 | 勤上光电股份有限公司 | Lighting control method and lighting system based on edge computing gateway |
| CN114201026A (en) * | 2021-11-19 | 2022-03-18 | 锐捷网络股份有限公司 | Voltage control method, voltage control device, storage medium and electronic equipment |
| CN118054389A (en) * | 2022-11-16 | 2024-05-17 | 华为技术有限公司 | Power supply equipment, power receiving equipment, chip and power supply system |
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