CN103595542B - A power supply terminal device, a power supply system and a power supply method - Google Patents
A power supply terminal device, a power supply system and a power supply method Download PDFInfo
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Abstract
The invention discloses a power supply terminal device, a power supply system and a power supply method, and relates to the field of Ethernet, wherein the power supply terminal device comprises a power supply module and a far-end detection controller. The both ends of the power supply module and the both ends of the far-end detection controller are all connected to the two ends of a parallel circuit composed of a load and a capacitor in a power supply line connection receiving end device through power supply lines. The far-end detection controller detects a current value of a direct current output of the power supply module, and provides a square wave current reused on the direct current output according to the current value of the direct current output. The rectangular wave current is in short circuit by the capacitor, and the rectangular wave current is only loaded on the power supply lines. A voltage value of the rectangular current is returned to the power supply module as a feedback. The power supply module determines a direct current voltage of the power supply lines according to the voltage value of the square wave current so as to obtain a far-end voltage, and the far-end voltage is compared to a far-end stabilization value, so that the output voltage is adjusted to make the far-end voltage value in accordance with the far-end voltage stabilization value. Through the above scheme, even if the power of the device changes a lot, and the lengths of the power supply lines are not determined, normal power supplying can be carried out on a far-end device to guarantee the continuous normal working of the far-end device.
Description
Technical field
The present invention relates to Ethernet field, particularly to a kind of power supply end equipment, electric power system and method for supplying power to.
Background technology
POE（Power Over Ethernet, POE）Technology refers in existing Ethernet wiring architecture not
In the case of making any change, moreover it is possible to provide direct current supply for equipment while for some network equipment transmission data signals
Technology.
POE configuration diagram shown in Figure 1, including PSE（Power Sourcing Equipment, feeder ear sets
Standby）And PD（Powered Device, receiving end equipment）, PSE includes power module 101 etc., and PD includes loading 103 etc., feed
Power supply and signal transmission collinearly do not use, and PSE is powered to PD using the supply lines 4/5 of ethernet port, 7/8 line, and uses
The holding wire 1/2 of ethernet port, 3/6 line carry out transmission signal.Due to Ethernet Cat.5（Surpass 5 class lines）Line is thinner, unit length
Resistance value is bigger than general supply lines, so when adopting existing POE technology, supply lines has larger pressure drop, this may lead
Cause far-end brownout it is impossible to remote equipment normal power supply.
Current solution is when being powered using POE, and the supply voltage at artificial raising PSE end is to compensate supply lines
On pressure drop, this in plant capacity change less, is feasible in the case of power supply line length is fixed.For example, equipment work
Voltage is 48V, and needing, according to plant capacity and the estimation of supply network length, the pressure drop compensating is 3V, then the supply voltage at PSE end
Just select 51V.But in fact, the changed power scope of equipment is that ratio is larger, with epon（Ethernet Passive
Optical Network, Ethernet passive optical network）As a example custom terminal, the maximum power dissipation of busy is 4 times of idle about,
And the power supply line length secretly setting during user's finishing is difficult to measure, these uncertain factors make to be difficult in practical operation
Accurately estimation compensates pressure drop, thus cannot be remote equipment normal power supply.
Content of the invention
An embodiment of the present invention technical problem to be solved is：A kind of power supply end equipment, electric power system and confession are provided
Method for electrically, with solve prior art plant capacity change greatly, in the case of the uncertain factor such as power supply line length is uncertain it is impossible to
Problem for remote equipment normal power supply.
A kind of power supply end equipment that one side according to embodiments of the present invention provides, described power supply end equipment includes：Electricity
Source module and far-end detection controller, the two ends of described power module and described far-end detect the two ends of controller all by power supply
Line connects the two ends of the parallel circuit of load and electric capacity composition in receiving end equipment；Described far-end detection controller detects described electricity
The current value of source module direct current output, the current value according to described direct current output provides square wave in described direct current output for the multiplexing
Electric current, described square wave current is by described capacitance short-circuit, so that described square wave current is carried on supply lines, by described square wave current
Magnitude of voltage feed back to described power module；Described power module determines on supply lines according to the magnitude of voltage of described square wave current
DC voltage, output voltage is deducted the DC voltage on supply lines and obtains far-end voltage, by far-end voltage and far-end voltage stabilizing value
Being compared, and adjust output voltage according to comparative result makes far-end voltage consistent with described far-end voltage stabilizing value.
Preferably, described far-end detects that the current value of controller described direct current output according to a certain percentage is described to determine
The peak-to-peak value of square wave current.
Preferably, described power module according to the peak-to-peak value of the magnitude of voltage of described square wave current and described square wave current with straight
DC voltage on the ratio-dependent supply lines formed by current value of stream output.
Preferably, described power module, when far-end voltage is more than far-end voltage stabilizing value, reduces output voltage, to reduce remote
Terminal voltage makes far-end voltage consistent with described far-end voltage stabilizing value；Described power module when far-end voltage be less than far-end voltage stabilizing value when,
Improving output voltage, making far-end voltage consistent with described far-end voltage stabilizing value to improve far-end voltage.
Preferably, described power supply end equipment also includes：First transformator and the second transformator；Described power module and described
Far-end detection controller all with the outfan of described first transformator and the outfan Colaesce of described second transformator, described first
The outfan of the outfan of transformator and described second transformator is also connected with supply lines.
A kind of electric power system that other side according to embodiments of the present invention provides, described electric power system includes above-mentioned confession
Electric end equipment and receiving end equipment, described power supply end equipment is powered for described receiving end equipment by supply lines；Described receiving end
Equipment includes load and electric capacity, and described load is in parallel with described electric capacity, and described far-end detects the square wave current quilt that controller provides
Described capacitance short-circuit, so that described square wave current is carried on supply lines.
Preferably, described receiving end equipment also includes the 3rd transformator and the 4th transformator, described load and described electric capacity
All it is connected with the input of described 3rd transformator and the input of described 4th transformator, the input of described 3rd transformator
It is also connected with supply lines with the input of described 4th transformator.
A kind of method of supplying power to that another aspect according to embodiments of the present invention provides, methods described includes：Far-end detects
Controller detects the current value of power module direct current output, and the current value according to described direct current output provides multiplexing in described direct current
Square wave current in output, described square wave current is by capacitance short-circuit in parallel with load in receiving end equipment, described square wave current
It is carried on supply lines, the magnitude of voltage of described square wave current is fed back to described power module；Described power module is according to described
The magnitude of voltage of square wave current determines the DC voltage on supply lines, and DC voltage output voltage being deducted on supply lines obtains far
Terminal voltage, far-end voltage is compared with far-end voltage stabilizing value, and according to comparative result adjust output voltage make far-end voltage with
Described far-end voltage stabilizing value is consistent.
Preferably, described far-end detects that controller provides multiplexing defeated in described direct current according to the current value of described direct current output
Square wave current on going out includes：Described far-end detects the current value of controller described direct current output according to a certain percentage to determine
The peak-to-peak value of described square wave current.
Preferably, described power module determines the unidirectional current briquetting on supply lines according to the magnitude of voltage of described square wave current
Include：Described power module is according to the electric current of the magnitude of voltage of described square wave current and the peak-to-peak value of described square wave current and direct current output
DC voltage on ratio-dependent supply lines formed by value.
Preferably, described power module adjusts output voltage according to comparative result and makes far-end voltage and described far-end voltage stabilizing value
Consistent inclusion：Described power module, when far-end voltage is more than far-end voltage stabilizing value, reduces output voltage, to reduce far-end voltage
Make far-end voltage consistent with described far-end voltage stabilizing value；Described power module, when far-end voltage is less than far-end voltage stabilizing value, improves defeated
Going out voltage, making far-end voltage consistent with described far-end voltage stabilizing value to improve far-end voltage.
Power supply end equipment, electric power system and the method for supplying power to being provided based on the present invention, detects controller by increasing far-end,
Detect that controller detects the current value of power module direct current output by far-end, square wave current in direct current output for the multiplexing be provided,
By capacitance short-circuit in parallel with load in receiving end equipment, it is all carried on supply lines square wave current, by square wave current
Magnitude of voltage feeds back to power supply mould, and power module determines the DC voltage on supply lines according to the magnitude of voltage of square wave current, will export
The DC voltage that voltage deducts on supply lines obtains far-end voltage, and far-end voltage is compared with far-end voltage stabilizing value, and according to
Comparative result adjustment output voltage make far-end voltage consistent with far-end voltage stabilizing value, even plant capacity change greatly, supply lines
Length does not know etc. in the case of uncertain factor it is also possible to be embodied as remote equipment normal power supply, ensures that remote equipment just continues
Often work.
Below by drawings and Examples, technical scheme is described in further detail.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, also may be used
So that other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 illustrates the configuration diagram of POE in prior art.
Fig. 2 illustrates the schematic diagram of one embodiment of electric power system of the present invention.
Fig. 3 illustrates the current value of direct current output of the present invention and the corresponding relation schematic diagram of square wave current.
Fig. 4 illustrates the schematic diagram of another embodiment of electric power system of the present invention.
Fig. 5 illustrates the schematic diagram of another embodiment of electric power system of the present invention.
The flow chart that Fig. 6 illustrates one embodiment of method of supplying power to of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
Fig. 2 is the schematic diagram of an embodiment of electric power system of the present invention.As shown in Fig. 2 electric power system includes feeder ear
Equipment and receiving end equipment, power supply end equipment is powered for receiving end equipment by supply lines.In fig. 2, C represents electric capacity.
Wherein power supply end equipment includes：Power module 201 and far-end detection controller 202, two ends of power module and remote
The two ends of end detection controller all connect two of the parallel circuit of load 203 and electric capacity composition in receiving end equipment by supply lines
End；Far-end detects that controller detects the current value of power module direct current output, and the current value according to direct current output provides multiplexing to exist
Square wave current in direct current output, square wave current is by capacitance short-circuit, so that square wave current is carried on supply lines, by square wave current
Magnitude of voltage feed back to power module；Power module determines the DC voltage on supply lines according to the magnitude of voltage of square wave current, will
The DC voltage that output voltage deducts on supply lines obtains far-end voltage, and far-end voltage is compared with far-end voltage stabilizing value, and
Adjusting output voltage according to comparative result makes far-end voltage consistent with far-end voltage stabilizing value.
Wherein, receiving end equipment at least includes loading 203 and electric capacity, and load is in parallel with electric capacity, and far-end detection controller carries
For square wave current by capacitance short-circuit so that square wave current is all carried on supply lines.Load can be various electrical equipments,
Such as PC etc., the present embodiment does not limit to this.Above-mentioned electric capacity is used for filtering spurious components or the arteries and veins in direct current supply
Punching, reduces AC ripple ripple coefficient, smooth direct current output.As a kind of energy storage device, electric capacity not only makes power supply direct current output
Steadily, reduce the impact to electronic circuit for the alternation pulse ripple, produce in also absorbable electronic circuit work process simultaneously
Current fluctuation and the interference that seals in via alternating current power supply are so that the service behaviour of electronic circuit is more stable.In addition, according to aforementioned
Already mentioned above, this electric capacity can also detect the square wave current that controller provides, so that square wave current all loads by short circuit far-end
On supply lines.The value of this electric capacity can be between 100uF-1000uF, for example, and this capacitance can be 470uF, here not
Exhaustive capacitance again, F is the iu of electric capacity, represents farad.
In fig. 2, P1 represents the first supply lines pair, and P2 represents the second supply lines pair, and the two ends of power module can be distinguished
Connect the first supply lines to and the second supply lines pair, be that the receiving end equipment of far-end is powered.Two power supplies of each supply lines pair
Line can be parallel relationship, can reduce the resistance of supply lines, improve power supplying efficiency.It should be noted that in ethernet networks, end
Mouthfuls 4,5,7,8 netting twine can be used separately as the first supply lines in the present embodiment to and the second supply lines pair, the present invention is not
Limit port and supply lines between specific corresponding relation.A kind of example is only gived, that is, between port 4 and port 5 in Fig. 2
Netting twine can be used as the first supply lines pair, the netting twine between port 7 and port 8 can be used as the second supply lines pair.This area
Technical staff is appreciated that port and other corresponding relations of supply lines pair are equally applicable to the present invention, no longer exhaustive here.Separately
Outward, the first supply lines in the present embodiment to and the second supply lines to being ethernet line, for example, Ethernet surpass 5 class lines, five
Class line, six class lines, twisted-pair feeder etc., the usually twisted-pair feeder of fine copper matter or copper-bearing alloy, this line is thinner, resistance per unit length value
Bigger than general supply lines, line has larger pressure drop, it is therefore possible to use pressure drop on the scheme compensating line of the present embodiment offer.
Wherein, far-end detect controller can direct current output according to a certain percentage current value determining square wave current
Peak-to-peak value, this ratio can according to circumstances flexibly set, and for example, with reference to shown in Fig. 3, the peak-to-peak value of square wave current can be equal to
The current value I of 10% direct current output0, then square wave current alternate between the 95% and 105% of direct current output, certainly, this
This ratio setting as needed, can also be 20%, 30% etc. by skilled person, concrete numerical value the present embodiment of this ratio
Do not limit.In addition, square-wave variations frequency the present embodiment does not also limit, for example, change frequency can be 5kHz.In addition, it is remote
Detection controller in end can collect, by the feedback circuit that inside carries, the magnitude of voltage obtaining square wave current, so that far-end detection control
The magnitude of voltage of square wave current is fed back to power module by device processed.
Wherein, power module can be according to the electricity of the peak-to-peak value of the magnitude of voltage of square wave current and square wave current and direct current output
DC voltage on ratio-dependent supply lines formed by flow valuve.Specifically, the magnitude of voltage of square wave current is divided by the peak of square wave current
Ratio formed by the current value of peak value and direct current output, you can obtain the DC voltage on supply lines.For example, the peak of square wave current
Ratio formed by the current value of peak value and direct current output is 10%, then the DC voltage on supply lines is 10 times of square wave current
Magnitude of voltage.In addition, above-mentioned power module can be any galvanic device can be provided, the present embodiment is not construed as limiting to this.
Wherein, power module adjusts output voltage according to comparative result makes far-end voltage consistent with far-end voltage stabilizing value, specifically
Including：
Power module, when far-end voltage is more than far-end voltage stabilizing value, illustrates that output voltage is too high, power module can reduce
Output voltage, makes far-end voltage consistent with far-end voltage stabilizing value to reduce far-end voltage；In addition, reduce can be pre- during output voltage
First set certain amplitude, be gradually lowered output voltage, during avoiding voltage suddenly significantly to change, damage remote equipment.
Power module, when far-end voltage is less than far-end voltage stabilizing value, illustrates that output voltage is too low, power module can improve
Output voltage, makes far-end voltage consistent with far-end voltage stabilizing value to improve far-end voltage.In addition, improve can be pre- during output voltage
First set certain amplitude, gradually step up output voltage, during avoiding voltage suddenly significantly to change, damage remote equipment.
When far-end voltage is equal to far-end voltage stabilizing value, illustrates that output voltage is just suitable, output voltage can be kept constant.
Generally also has the transformator of some standard configurations in ethernet device, for example, the present embodiment is powered the electricity in end equipment
Source module and far-end detection controller can be connected with supply lines using transformator, but not using the transformation function of transformator,
Transformator only plays interconnection function, such that it is able to compatible existing equipment well；And for example, the load in receiving end equipment and electric capacity
Can be connected with supply lines using transformator, but not using the transformation function of transformator, transformator only plays interconnection function, from
And can be very good compatible existing equipment.Illustrate below with reference to Fig. 4, Fig. 4 be feeder ear device systems of the present invention another
The schematic diagram of embodiment.In the diagram, T1 represents the first transformator, and T2 represents the second transformator, and T3 represents the 3rd transformator, T4
Represent the 4th transformator, other symbol implications are identical with Fig. 2, repeat no more here.
On the basis of power supply end equipment shown in Fig. 2, as shown in figure 4, power supply end equipment can also include：First transformator
With the second transformator；Power module and far-end detection controller all with the outfan of the first transformator and the output of the second transformator
End connects, and the outfan of the outfan of the first transformator and the second transformator is also connected with supply lines, the wherein first transformator defeated
Go out end and can connect the first supply lines pair, the outfan of the second transformator can connect the second supply lines pair.
On the basis of power supply end equipment shown in Fig. 2, as shown in figure 4, receiving end equipment can also include the 3rd transformator
With the 4th transformator, load and electric capacity is all connected with the input of the 3rd transformator and the input of the 4th transformator, the 3rd change
The input of the input of depressor and the 4th transformator is also connected with supply lines, and the input of the wherein the 3rd transformator can connect
One supply lines pair, the input of the 4th transformator can connect the second supply lines pair.
Above-described embodiment, detects controller by increasing far-end, defeated by far-end detection controller detection power module direct current
The current value going out, provides square wave current in direct current output for the multiplexing, and square wave current is by parallel with load in receiving end equipment
Capacitance short-circuit, it is all carried on supply lines, the magnitude of voltage of square wave current is fed back to power supply mould, power module is according to square wave
The magnitude of voltage of electric current determines the DC voltage on supply lines, output voltage is deducted the DC voltage on supply lines and obtains far-end electricity
Pressure, far-end voltage is compared with far-end voltage stabilizing value, and makes far-end voltage and far-end according to comparative result adjustment output voltage
Voltage stabilizing value is consistent, even plant capacity change greatly, power supply line length the uncertain factor such as do not know in the case of it is also possible in fact
It is now remote equipment normal power supply, ensure that remote equipment continues normal work.
Fig. 5 is the schematic diagram of another embodiment of electric power system of the present invention, and the electric power system of this embodiment also includes：For
The part of transmission signal.In Figure 5, T5 represents the 5th transformator, and T6 represents the 6th transformator, and T7 represents the 7th transformator, T8
Represent the 8th transformator, S1 represents the first holding wire pair, S2 represents secondary signal line pair.As shown in figure 5, in power supply end equipment
Also include the 5th transformator and the 6th transformator, the outfan of the 5th transformator connects ethernet port 1 and 2, the 6th change respectively
The outfan of depressor connects ethernet port 3 and 6, and the input of the 5th transformator and the 6th transformator can connect signal transmitting and receiving
Equipment；Also include the 7th transformator and the 8th transformator in receiving end equipment, the input of the 7th transformator connect respectively with
Net very much port 1 and 2, the input of the 8th transformator connects ethernet port 3 and 6, the 7th transformator and the 8th transformator defeated
Go out end and can connect signal sending and receiving equipment；Wherein, ethernet port 1 is corresponding is the first holding wire, and ethernet port 2 is corresponding
It is secondary signal line, ethernet port 3 is corresponding to be the 3rd holding wire, ethernet port 6 is corresponding to be the 4th holding wire.
In above-described embodiment, feed power supply and signal transmission are not collinearly used, thus being realized respectively by different circuits
Power supply and the transmission of signal.
Each transformator mentioned above, i.e. the first transformator, the second transformator, the 3rd transformator and the 4th transformator, with
And the 5th transformator, the 6th transformator, the 7th transformator and the 8th transformation implement body can be ethernet network transformators, referred to as
Network transformer, Main Function is to improve EMI（Electromagnetic interference）Characteristic, level isolation etc..Network transformer specifically have T1/E1 every
From transformator, T3/E3 isolating transformer；ISDN（Integrated Service Digital Network, Integrated Digital Services
Net）/ADSL（Asymmetric Digital Subscriber Line, ADSL）Interface transformer；
VDSL（Very-high-bit-rate Digital Subscriber loop, very-high-bit-rate digital subscriber loop）Interface transformation
Device；SDH（Synchronous Digital Hierarchy, SDH）Interface transformer etc., the present embodiment is to this not
Limit.
Fig. 6 is the flow chart of one embodiment of method of supplying power to of the present invention.As shown in fig. 6, the method for supplying power in this embodiment
Including：
S602, far-end detects that controller detects the current value of power module direct current output, according to the current value of direct current output
There is provided square wave current in direct current output for the multiplexing, square wave current is by capacitance short-circuit in parallel with load in receiving end equipment, institute
State square wave current to be carried on supply lines, the magnitude of voltage of square wave current is fed back to power module；
S604, power module determines the DC voltage on supply lines according to the magnitude of voltage of square wave current, and output voltage is subtracted
Go the DC voltage on supply lines to obtain far-end voltage, far-end voltage is compared with far-end voltage stabilizing value, and according to comparing knot
Fruit adjustment output voltage makes far-end voltage consistent with far-end voltage stabilizing value.
Wherein, far-end detects that controller provides square wave current in direct current output for the multiplexing according to the current value of direct current output
Including：The peak-to-peak value to determine square wave current for the current value of far-end detection controller direct current output according to a certain percentage.
Wherein, power module determines that according to the magnitude of voltage of square wave current the DC voltage on supply lines includes：Power module
The peak-to-peak value of the magnitude of voltage according to square wave current and square wave current and ratio-dependent supply lines formed by the current value of direct current output
On DC voltage.
The present embodiment additionally provides power module and makes far-end voltage and far-end voltage stabilizing according to comparative result adjustment output voltage
It is worth a kind of consistent scheme, specially：
When far-end voltage is more than far-end voltage stabilizing value, illustrate that output voltage is too high, power module can reduce output voltage,
Make far-end voltage consistent with far-end voltage stabilizing value to reduce far-end voltage；In addition, one can be preset when reducing output voltage
Fixed amplitude, is gradually lowered output voltage, during avoiding voltage suddenly significantly to change, damages remote equipment.
When far-end voltage is less than far-end voltage stabilizing value, illustrate that output voltage is too low, power module can improve output voltage,
Make far-end voltage consistent with far-end voltage stabilizing value to improve far-end voltage.In addition, one can be preset when improving output voltage
Fixed amplitude, gradually steps up output voltage, during avoiding voltage suddenly significantly to change, damages remote equipment.
When far-end voltage is equal to far-end voltage stabilizing value, illustrates that output voltage is just suitable, output voltage can be kept constant.
Above-described embodiment, detects controller by increasing far-end, defeated by far-end detection controller detection power module direct current
The current value going out, provides square wave current in direct current output for the multiplexing, the magnitude of voltage of square wave current is fed back to power supply mould, power supply
Module determines the DC voltage on supply lines according to the magnitude of voltage of square wave current, output voltage is deducted the unidirectional current on supply lines
Pressure obtains far-end voltage, and far-end voltage is compared with far-end voltage stabilizing value, and is made far according to comparative result adjustment output voltage
Terminal voltage is consistent with far-end voltage stabilizing value, even plant capacity change greatly, the uncertain factor feelings such as power supply line length is uncertain
It is also possible to be embodied as remote equipment normal power supply under condition, ensure that remote equipment continues normal work.
Ethernet port according to the present invention can be specifically RJ45 interface, support 10,000,000 and 100,000,000 adaptive networks
Connection speed.Common RJ45 interface has two classes：DTE for ethernet nic, router ethernet interface etc.（Data terminal
Equipment）Type, is also used for the DCE of switch etc.（Data communications equipment）Type.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can pass through hardware
To complete it is also possible to the hardware being instructed correlation by program is completed, described program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read only memory, disk or CD etc..
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (11)
1. a kind of power supply end equipment is it is characterised in that described power supply end equipment includes：Power module and far-end detection controller,
The two ends of described power module and described far-end detect that the two ends of controller are all connected in receiving end equipment by supply lines and load
Two ends with the parallel circuit of electric capacity composition；Described far-end detects that controller detects the electric current of described power module direct current output
Value, the current value according to described direct current output provides square wave current in described direct current output for the multiplexing, described square wave current quilt
Described capacitance short-circuit, so that described square wave current is carried on supply lines, the magnitude of voltage of described square wave current is fed back to described
Power module；Described power module determines the DC voltage on supply lines according to the magnitude of voltage of described square wave current, will export electricity
Press the DC voltage that deducts on supply lines to obtain far-end voltage, far-end voltage be compared with far-end voltage stabilizing value, and according to than
Relatively result adjustment output voltage makes far-end voltage consistent with described far-end voltage stabilizing value.
2. power supply end equipment according to claim 1 is it is characterised in that described far-end detects controller according to a certain percentage
Described direct current output the peak-to-peak value to determine described square wave current for the current value.
3. power supply end equipment according to claim 1 is it is characterised in that described power module is according to described square wave current
Unidirectional current on the peak-to-peak value of magnitude of voltage and described square wave current and ratio-dependent supply lines formed by the current value of direct current output
Pressure.
4. power supply end equipment according to claim 1 is more than far-end it is characterised in that described power module works as far-end voltage
During voltage stabilizing value, reducing output voltage, making far-end voltage consistent with described far-end voltage stabilizing value to reduce far-end voltage；Described power supply
Module when far-end voltage be less than far-end voltage stabilizing value when, improve output voltage so that improve far-end voltage make far-end voltage with described
Far-end voltage stabilizing value is consistent.
5. power supply end equipment according to claim 1 is it is characterised in that described power supply end equipment also includes：First transformation
Device and the second transformator；Described power module and described far-end detection outfan and institute all with described first transformator for the controller
The outfan stating the second transformator connects, and the outfan of the outfan of described first transformator and described second transformator is also connected with
Supply lines.
6. a kind of electric power system is it is characterised in that described electric power system includes the power supply as described in any one of claim 1-5
End equipment and receiving end equipment, described power supply end equipment is powered for described receiving end equipment by supply lines；Described receiving end sets
Standby inclusion load and electric capacity, described load is in parallel with described electric capacity, and described far-end detects the square wave current of controller offer by institute
State capacitance short-circuit, so that described square wave current is carried on supply lines.
7. electric power system according to claim 6 it is characterised in that described receiving end equipment also include the 3rd transformator and
4th transformator, described load and described electric capacity all with the input of described 3rd transformator and the input of described 4th transformator
End connects, and the input of described 3rd transformator and the input of described 4th transformator are also connected with supply lines.
8. a kind of method of supplying power to is it is characterised in that power supply end equipment includes：Power module and far-end detection controller, described electricity
The two ends of source module and described far-end detect that the two ends of controller all connect load and electric capacity in receiving end equipment by supply lines
The two ends of the parallel circuit of composition；Methods described includes：
Described far-end detects that controller detects the current value of described power module direct current output, according to the electric current of described direct current output
Value provides square wave current in described direct current output for the multiplexing, and described square wave current is by electricity in parallel with load in receiving end equipment
Hold short circuit, described square wave current is carried on supply lines, and the magnitude of voltage of described square wave current is fed back to described power module；
Described power module determines the DC voltage on supply lines according to the magnitude of voltage of described square wave current, and output voltage is deducted
DC voltage on supply lines obtains far-end voltage, and far-end voltage is compared with far-end voltage stabilizing value, and according to comparative result
Adjustment output voltage makes far-end voltage consistent with described far-end voltage stabilizing value.
9. method according to claim 8 is it is characterised in that described far-end detection controller is according to described direct current output
Current value provides square wave current in described direct current output for the multiplexing to include：
Described far-end detects the current value of controller described direct current output according to a certain percentage to determine described square wave current
Peak-to-peak value.
10. method according to claim 8 is it is characterised in that described power module is according to the voltage of described square wave current
Value determines that the DC voltage on supply lines includes：
Described power module is according to the electricity of the magnitude of voltage of described square wave current and the peak-to-peak value of described square wave current and direct current output
DC voltage on ratio-dependent supply lines formed by flow valuve.
11. methods according to claim 8 are it is characterised in that described power module is according to comparative result adjustment output electricity
Pressure makes that far-end voltage is consistent with described far-end voltage stabilizing value to be included：
Described power module, when far-end voltage is more than far-end voltage stabilizing value, reduces output voltage, reduce far-end voltage to make far
Terminal voltage is consistent with described far-end voltage stabilizing value；Described power module, when far-end voltage is less than far-end voltage stabilizing value, improves output electricity
Pressure, makes far-end voltage consistent with described far-end voltage stabilizing value to improve far-end voltage.
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| CN105357017B (en) * | 2015-11-16 | 2018-06-19 | 上海斐讯数据通信技术有限公司 | Stablize the system and method for POE supply voltages |
| 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 |
| CN110266103B (en) * | 2019-05-28 | 2020-09-15 | 华信咨询设计研究院有限公司 | 5G communication power supply system and control method thereof |
| CN110762794B (en) * | 2019-10-31 | 2021-07-20 | 广东美的制冷设备有限公司 | Power supply voltage determining method and device, compressor and air conditioner |
| CN114624634B (en) * | 2022-05-17 | 2022-09-30 | 陕西天视致远航空技术有限公司 | Plug detection system and method of Ethernet interface and electronic equipment |
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