CN103595542A - 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 a kind of feeder ear equipment, electric power system and method for supplying power to.
Background technology
POE(Power Over Ethernet, Power over Ethernet) technology refers in the situation that existing Ethernet wiring architecture does not make any changes, and when being some network equipment transmission of data signals, can also provide for equipment the technology of direct current supply.
POE configuration diagram shown in Figure 1, comprise PSE(Power Sourcing Equipment, feeder ear equipment) and PD(Powered Device, receiving end equipment), PSE comprises power module 101 etc., and PD comprises load 103 etc., and feed power supply and signal transmit not conllinear to be used, PSE carrys out the power supply to PD with supply lines 4/5,7/8 line of ethernet port, and carrys out signal transmission with holding wire 1/2,3/6 line of ethernet port.Because Ethernet Cat.5(surpasses 5 class lines) line is thinner, and resistance per unit length value is larger than general supply lines, so while adopting existing POE technology, have larger pressure drop on supply lines, this just may cause far-end brownout, cannot be to remote equipment normal power supply.
Current solution is when adopting POE power supply, and the supply power voltage of artificial raising PSE end is with the pressure drop on compensation supply lines, and this changes little at plant capacity, in the fixed situation of supply lines length, be feasible.For example, equipment operating voltage is 48V, according to the pressure drop of plant capacity and the compensation of supply network length estimation needs, is 3V, and the supply power voltage of PSE end is just selected 51V.But in fact, the power excursion of equipment is larger, with epon(Ethernet Passive Optical Network, Ethernet passive optical network) custom terminal is example, the maximum power dissipation of busy is 4 times of left and right of idle, and the supply lines length that user secretly sets while fitting up is difficult to measure, these uncertain factors make to be difficult to accurately estimation compensation pressure drop in practical operation, thereby cannot be remote equipment normal power supply.
Summary of the invention
An embodiment of the present invention technical problem to be solved is: a kind of feeder ear equipment, electric power system and method for supplying power to are provided, to solve in the uncertain factor situations such as prior art changes greatly at plant capacity, supply lines length is uncertain, it cannot be the problem of remote equipment normal power supply.
A kind of feeder ear equipment providing according to the embodiment of the present invention aspect, described feeder ear equipment comprises: power module and far-end detect controller, and the two ends that the two ends of described power module and described far-end detect controller are all connected the two ends of the parallel circuits of load and electric capacity composition in receiving end equipment by supply lines; Described far-end detects the current value that controller detects described power module direct current output, according to the current value of described direct current output, provide multiplexing square wave current in described direct current output, described square wave current is by 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 is determined the direct voltage on supply lines according to the magnitude of voltage of described square wave current, the direct voltage that output voltage is deducted on supply lines obtains far-end voltage, far-end voltage and far-end voltage stabilizing value are compared, and make far-end voltage consistent with described far-end voltage stabilizing value according to comparative result adjustment output voltage.
Preferably, the current value of described far-end detection controller described direct current output is according to a certain percentage determined the peak-to-peak value of described square wave current.
Preferably, the direct voltage on the ratio-dependent supply lines that described power module becomes with the current value of direct current output according to the peak-to-peak value of the magnitude of voltage of described square wave current and described square wave current.
Preferably, described power module, when far-end voltage is greater than far-end voltage stabilizing value, reduces output voltage, to reduce far-end voltage, makes 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 output voltage, to improve far-end voltage, makes far-end voltage consistent with described far-end voltage stabilizing value.
Preferably, described feeder ear equipment also comprises: the first transformer and the second transformer; Described power module and described far-end detect controller all with the output Colaesce of output and described second transformer of described the first transformer, the output of the output of described the first transformer and described the second transformer is also connected supply lines.
A kind of electric power system providing according to another aspect of the embodiment of the present invention, described electric power system comprises above-mentioned feeder ear equipment and receiving end equipment, described feeder ear equipment is that described receiving end equipment is powered by supply lines; Described receiving end equipment comprises load and electric capacity, described load and described Capacitance parallel connection, and the square wave current that described far-end detection controller provides is by described capacitance short-circuit, so that described square wave current is carried on supply lines.
Preferably, described receiving end equipment also comprises the 3rd transformer and the 4th transformer, described load is all connected with the input of described the 4th transformer with the input of described the 3rd transformer with described electric capacity, and the input of the input of described the 3rd transformer and described the 4th transformer is also connected supply lines.
A kind of method of supplying power to providing according to another aspect of the embodiment of the present invention, described method comprises: far-end detects the current value that controller detects the output of power module direct current, according to the current value of described direct current output, provide multiplexing square wave current in described direct current output, described square wave current is by capacitance short-circuit in parallel with load in receiving end equipment, 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 is determined the direct voltage on supply lines according to the magnitude of voltage of described square wave current, the direct voltage that output voltage is deducted on supply lines obtains far-end voltage, far-end voltage and far-end voltage stabilizing value are compared, and make far-end voltage consistent with described far-end voltage stabilizing value according to comparative result adjustment output voltage.
Preferably, described far-end detects controller provides multiplexing square wave current in described direct current output to comprise according to the current value of described direct current output: the current value of described far-end detection controller described direct current output is according to a certain percentage determined the peak-to-peak value of described square wave current.
Preferably, described power module determines that according to the magnitude of voltage of described square wave current the direct voltage on supply lines comprises: the direct voltage on the ratio-dependent supply lines that described power module becomes with the current value of direct current output according to the peak-to-peak value of the magnitude of voltage of described square wave current and described square wave current.
Preferably, described power module is adjusted output voltage according to comparative result and is made far-end voltage and described far-end voltage stabilizing value consistent comprising: described power module is when far-end voltage is greater than far-end voltage stabilizing value, reduce 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 output voltage, to improve far-end voltage, makes far-end voltage consistent with described far-end voltage stabilizing value.
Based on feeder ear equipment provided by the invention, electric power system and method for supplying power to, by increasing far-end, detect controller, by far-end, detect the current value that controller detects the output of power module direct current, multiplexing square wave current in direct current output is provided, square wave current is by capacitance short-circuit in parallel with load in receiving end equipment, 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 determined the direct voltage on supply lines according to the magnitude of voltage of square wave current, the direct voltage that output voltage is deducted on supply lines obtains far-end voltage, far-end voltage and far-end voltage stabilizing value are compared, and make far-end voltage consistent with far-end voltage stabilizing value according to comparative result adjustment output voltage, even if change greatly at plant capacity, in the uncertain factor situations such as supply lines length is uncertain, also can be embodied as remote equipment normal power supply, ensure that remote equipment continues normal operation.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 illustrates the configuration diagram of Power over Ethernet in prior art.
Fig. 2 illustrates the schematic diagram of an 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.
Fig. 6 illustrates the flow chart of an embodiment of method of supplying power to of the present invention.
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 clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to 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 Figure 2, electric power system comprises feeder ear equipment and receiving end equipment, and feeder ear equipment is that receiving end equipment is powered by supply lines.In Fig. 2, C represents electric capacity.
Wherein feeder ear equipment comprises: power module 201 and far-end detect controller 202, and the two ends that the two ends of power module and far-end detect controller are all connected the two ends of the parallel circuits of load 203 and electric capacity composition in receiving end equipment by supply lines; Far-end detects the current value that controller detects the output of power module direct current, according to the current value of direct current output, provide multiplexing square wave current in direct current output, square wave current, by capacitance short-circuit, so that square wave current is carried on supply lines, feeds back to power module by the magnitude of voltage of square wave current; Power module is determined the direct voltage on supply lines according to the magnitude of voltage of square wave current, the direct voltage that output voltage is deducted on supply lines obtains far-end voltage, far-end voltage and far-end voltage stabilizing value are compared, and make far-end voltage consistent with far-end voltage stabilizing value according to comparative result adjustment output voltage.
Wherein, receiving end equipment at least comprises load 203 and electric capacity, load and Capacitance parallel connection, and the square wave current that far-end detection controller provides is by capacitance short-circuit, so that square wave current is all carried on supply lines.Load can be various power consumption equipments, and such as PC etc., the present embodiment does not limit this.Above-mentioned electric capacity, for spuious component or the pulse of filtering direct current supply, reduces and exchanges pulse ripple coefficient, smooth direct current output.As a kind of energy storage device, electric capacity not only makes the output of power supply direct current steadily, reduced the impact of alternation pulse ripple on electronic circuit, also can absorb the current fluctuation producing in the electronic circuit course of work and the interference sealing in via AC power simultaneously, make the service behaviour of electronic circuit more stable.In addition, according to aforementioned, mentioned, this electric capacity can also detect the square wave current that controller provides by short circuit far-end, so that square wave current is all carried on supply lines.The value of this electric capacity can be between 100uF-1000uF, and for example, this capacitance can be 470uF, no longer exhaustive capacitance here, and F is the international unit of electric capacity, represents farad.
In Fig. 2, P1 represents the first supply lines pair, and P2 represents the second supply lines pair, the two ends of power module can connect respectively the first supply lines to the second supply lines pair, be the receiving end equipment power supply of far-end.Two right supply lines of each supply lines can be relations in parallel, can reduce the resistance of supply lines, improve power supplying efficiency.It should be noted that, in Ethernet, the netting twine of port 4,5,7,8 can be used separately as the first supply lines in the present embodiment to the second supply lines pair, the present invention do not limit port and supply lines between specific corresponding relation.In Fig. 2, only provided a kind of example, the netting twine between port 4 and port 5 can be used as the first supply lines pair, and the netting twine between port 7 and port 8 can be used as the second supply lines pair.Other right corresponding relations are equally applicable to the present invention to it will be appreciated by those skilled in the art that port and supply lines, no longer exhaustive here.In addition, the first supply lines in the present embodiment to the second supply lines to being ethernet line, for example, Ethernet surpasses 5 class lines, category-5 cable, six class lines, twisted-pair feeder etc., is generally the twisted-pair feeder of fine copper matter or copper-bearing alloy, and this line is thinner, resistance per unit length value is larger than general supply lines, on line, there is larger pressure drop, therefore, can adopt pressure drop on the scheme compensating wire that the present embodiment provides.
Wherein, the current value that far-end detects the direct current output that controller can be is according to a certain percentage determined the peak-to-peak value of square wave current, and this ratio can according to circumstances be set flexibly, for example, shown in Figure 3, the peak-to-peak value of square wave current can equal the current value I of 10% direct current output
0, square wave current direct current output 95% and 105% between alternately change, certainly, those skilled in the art as required, can also be 20%, 30% etc. by this ratio setting, concrete numerical value the present embodiment of this ratio does not limit.In addition, square-wave variations frequency the present embodiment does not limit yet, and for example, change frequency can be 5kHz.In addition, the feedback circuit that far-end detection controller can carry by inside is collected the magnitude of voltage that obtains square wave current, so that far-end detects controller, the magnitude of voltage of square wave current is fed back to power module.
Wherein, the direct voltage on the ratio-dependent supply lines that power module can become with the current value of direct current output according to the peak-to-peak value of the magnitude of voltage of square wave current and square wave current.Concrete, the ratio that the current value that the magnitude of voltage of square wave current is exported divided by peak-to-peak value and the direct current of square wave current becomes, can obtain the direct voltage on supply lines.For example, the peak-to-peak value of square wave current is 10% with the ratio that the current value of direct current output becomes, and the direct voltage on supply lines is the magnitude of voltage of the square wave current of 10 times.In addition, above-mentioned power module can be anyly can provide galvanic device, and the present embodiment is not construed as limiting this.
Wherein, power module is adjusted output voltage according to comparative result makes far-end voltage consistent with far-end voltage stabilizing value, specifically comprises:
Power module, when far-end voltage is greater than far-end voltage stabilizing value, illustrates that output voltage is too high, and power module can reduce output voltage, to reduce far-end voltage, makes far-end voltage consistent with far-end voltage stabilizing value; In addition, while reducing output voltage, can preset certain amplitude, reduce gradually output voltage, when 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, and power module can improve output voltage, to improve far-end voltage, makes far-end voltage consistent with far-end voltage stabilizing value.In addition, while improving output voltage, can preset certain amplitude, improve gradually output voltage, when avoiding voltage suddenly significantly to change, infringement remote equipment.
When far-end voltage equals far-end voltage stabilizing value, illustrate that output voltage is just in time suitable, can keep output voltage constant.
In ethernet device, conventionally also has the transformer of some standard configurations, for example, power module in the present embodiment feeder ear equipment detects controller with far-end and can utilize transformer to be connected with supply lines, but do not use the transformation function of transformer, transformer only plays connection function, thereby can well compatible existing equipment; And for example, the load in receiving end equipment can utilize transformer to be connected with supply lines with electric capacity, but does not use the transformation function of transformer, and transformer only plays connection function, thereby can well compatible existing equipment.Below with reference to Fig. 4, describe, Fig. 4 is the schematic diagram of another embodiment of feeder ear device systems of the present invention.In Fig. 4, T1 represents the first transformer, and T2 represents the second transformer, and T3 represents the 3rd transformer, and T4 represents the 4th transformer, and other symbol implications are identical with Fig. 2, repeat no more here.
On the basis of the equipment of feeder ear shown in Fig. 2, as shown in Figure 4, feeder ear equipment can also comprise: the first transformer and the second transformer; Power module detects controller with far-end and is all connected with the output of the second transformer with the output of the first transformer, the output of the output of the first transformer and the second transformer is also connected supply lines, wherein the output of the first transformer can connect the first supply lines pair, and the output of the second transformer can connect the second supply lines pair.
On the basis of the equipment of feeder ear shown in Fig. 2, as shown in Figure 4, receiving end equipment can also comprise the 3rd transformer and the 4th transformer, load is all connected with the input of the 4th transformer with the input of the 3rd transformer with electric capacity, the input of the input of the 3rd transformer and the 4th transformer is also connected supply lines, wherein the input of the 3rd transformer can connect the first supply lines pair, and the input of the 4th transformer can connect the second supply lines pair.
Above-described embodiment, by increasing far-end, detect controller, by far-end, detect the current value that controller detects the output of power module direct current, multiplexing square wave current in direct current output is provided, square wave current is by capacitance short-circuit in parallel with load in receiving end equipment, 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 determined the direct voltage on supply lines according to the magnitude of voltage of square wave current, the direct voltage that output voltage is deducted on supply lines obtains far-end voltage, far-end voltage and far-end voltage stabilizing value are compared, and make far-end voltage consistent with far-end voltage stabilizing value according to comparative result adjustment output voltage, even if change greatly at plant capacity, in the uncertain factor situations such as supply lines length is uncertain, also can be embodied as remote equipment normal power supply, ensure that remote equipment continues normal operation.
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 comprises: for the parts of signal transmission.In Fig. 5, T5 represents the 5th transformer, and T6 represents the 6th transformer, and T7 represents the 7th transformer, and T8 represents the 8th transformer, and S1 represents first signal line pair, and S2 represents secondary signal line pair.As shown in Figure 5, in feeder ear equipment, also comprise the 5th transformer and the 6th transformer, the output of the 5th transformer connects respectively ethernet port 1 and 2, the input that the output of the 6th transformer connects ethernet port 3 and 6, the five transformers and the 6th transformer can be connected signal sending and receiving equipment; In receiving end equipment, also comprise the 7th transformer and the 8th transformer, the input of the 7th transformer connects respectively ethernet port 1 and 2, the output that the input of the 8th transformer connects ethernet port 3 and 6, the seven transformers and the 8th transformer can be connected signal sending and receiving equipment; Wherein, ethernet port 1 correspondence be first signal line, ethernet port 2 correspondences be secondary signal line, ethernet port 3 correspondences be the 3rd holding wire, ethernet port 6 correspondences be the 4th holding wire.
In above-described embodiment, feed power supply and signal transmit not conllinear to be used, thereby by different circuits, realizes respectively the transmission of power supply and signal.
Above-mentioned each transformer of mentioning, i.e. the first transformer, the second transformer, the 3rd transformer and the 4th transformer, and the 5th transformer, the 6th transformer, the 7th transformer and the 8th transformer can be specifically ethernet network transformers, be called for short network transformer, Main Function is to improve EMI(electromagnetic interference) characteristic, level isolation etc.Network transformer specifically has T1/E1 isolating transformer, T3/E3 isolating transformer; ISDN(Integrated Service Digital Network, integrated services digital network)/ADSL(Asymmetric Digital Subscriber Line, ADSL (Asymmetric Digital Subscriber Line)) interface transformer; VDSL(Very-high-bit-rate Digital Subscriber loop, very-high-bit-rate digital subscriber loop) interface transformer; SDH(Synchronous Digital Hierarchy, SDH (Synchronous Digital Hierarchy)) interface transformer etc., the present embodiment does not limit this.
Fig. 6 is the flow chart of an embodiment of method of supplying power to of the present invention.As shown in Figure 6, the method for supplying power in this embodiment comprises:
S602, far-end detects the current value that controller detects the output of power module direct current, according to the current value of direct current output, provide multiplexing square wave current in direct current output, square wave current is by capacitance short-circuit in parallel with load in receiving end equipment, described square wave current is carried on supply lines, and the magnitude of voltage of square wave current is fed back to power module;
S604, power module is determined the direct voltage on supply lines according to the magnitude of voltage of square wave current, the direct voltage that output voltage is deducted on supply lines obtains far-end voltage, far-end voltage and far-end voltage stabilizing value are compared, and make far-end voltage consistent with far-end voltage stabilizing value according to comparative result adjustment output voltage.
Wherein, far-end detects controller provides multiplexing square wave current in direct current output to comprise according to the current value of direct current output: the current value of far-end detection controller direct current output is according to a certain percentage determined the peak-to-peak value of square wave current.
Wherein, power module determines that according to the magnitude of voltage of square wave current the direct voltage on supply lines comprises: the direct voltage on the ratio-dependent supply lines that power module becomes with the current value of direct current output according to the peak-to-peak value of the magnitude of voltage of square wave current and square wave current.
The present embodiment also provides power module to adjust output voltage according to comparative result and has made the far-end voltage a kind of scheme consistent with far-end voltage stabilizing value, is specially:
When far-end voltage is greater than far-end voltage stabilizing value, illustrate that output voltage is too high, power module can reduce output voltage, to reduce far-end voltage, makes far-end voltage consistent with far-end voltage stabilizing value; In addition, while reducing output voltage, can preset certain amplitude, reduce gradually output voltage, when avoiding voltage suddenly significantly to change, damage 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, to improve far-end voltage, makes far-end voltage consistent with far-end voltage stabilizing value.In addition, while improving output voltage, can preset certain amplitude, improve gradually output voltage, when avoiding voltage suddenly significantly to change, infringement remote equipment.
When far-end voltage equals far-end voltage stabilizing value, illustrate that output voltage is just in time suitable, can keep output voltage constant.
Above-described embodiment, by increasing far-end, detect controller, by far-end, detect the current value that controller detects the output of power module direct current, multiplexing square wave current in direct current output is provided, the magnitude of voltage of square wave current is fed back to power supply mould, power module is determined the direct voltage on supply lines according to the magnitude of voltage of square wave current, the direct voltage that output voltage is deducted on supply lines obtains far-end voltage, far-end voltage and far-end voltage stabilizing value are compared, and make far-end voltage consistent with far-end voltage stabilizing value according to comparative result adjustment output voltage, even if change greatly at plant capacity, in the uncertain factor situations such as supply lines length is uncertain, also can be embodied as remote equipment normal power supply, ensure that remote equipment continues normal operation.
The ethernet port the present invention relates to can be specifically RJ45 interface, supports 10,000,000 and 100,000,000 adaptive network connection speeds.Common RJ45 interface has two classes: for the DTE(data terminal equipment of ethernet nic, router ethernet interface etc.) type, be also useful on the DCE(data communications equipment of switch etc.) type.
One of ordinary skill in the art will appreciate that all or part of step that realizes above-described embodiment can complete by hardware, also can come the hardware that instruction is relevant to complete by program, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (11)
1. a feeder ear equipment, it is characterized in that, described feeder ear equipment comprises: power module and far-end detect controller, and the two ends that the two ends of described power module and described far-end detect controller are all connected the two ends of the parallel circuits of load and electric capacity composition in receiving end equipment by supply lines; Described far-end detects the current value that controller detects described power module direct current output, according to the current value of described direct current output, provide multiplexing square wave current in described direct current output, described square wave current is by 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 is determined the direct voltage on supply lines according to the magnitude of voltage of described square wave current, the direct voltage that output voltage is deducted on supply lines obtains far-end voltage, far-end voltage and far-end voltage stabilizing value are compared, and make far-end voltage consistent with described far-end voltage stabilizing value according to comparative result adjustment output voltage.
2. feeder ear equipment according to claim 1, is characterized in that, the current value of described far-end detection controller described direct current output is according to a certain percentage determined the peak-to-peak value of described square wave current.
3. feeder ear equipment according to claim 1, is characterized in that, the direct voltage on the ratio-dependent supply lines that described power module becomes with the current value of direct current output according to the peak-to-peak value of the magnitude of voltage of described square wave current and described square wave current.
4. feeder ear equipment according to claim 1, is characterized in that, described power module, when far-end voltage is greater than far-end voltage stabilizing value, reduces output voltage, to reduce far-end voltage, makes 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 output voltage, to improve far-end voltage, makes far-end voltage consistent with described far-end voltage stabilizing value.
5. feeder ear equipment according to claim 1, is characterized in that, described feeder ear equipment also comprises: the first transformer and the second transformer; Described power module detects controller with described far-end and is all connected with the output of described the second transformer with the output of described the first transformer, and the output of the output of described the first transformer and described the second transformer is also connected supply lines.
6. an electric power system, is characterized in that, described electric power system comprises feeder ear equipment and the receiving end equipment as described in claim 1-5 any one, and described feeder ear equipment is that described receiving end equipment is powered by supply lines; Described receiving end equipment comprises load and electric capacity, described load and described Capacitance parallel connection, and the square wave current that described far-end detection controller provides is by described capacitance short-circuit, so that described square wave current is carried on supply lines.
7. electric power system according to claim 6, it is characterized in that, described receiving end equipment also comprises the 3rd transformer and the 4th transformer, described load is all connected with the input of described the 4th transformer with the input of described the 3rd transformer with described electric capacity, and the input of the input of described the 3rd transformer and described the 4th transformer is also connected supply lines.
8. a method of supplying power to, is characterized in that, described method comprises:
Far-end detects the current value that controller detects the output of power module direct current, according to the current value of described direct current output, provide multiplexing square wave current in described direct current output, described square wave current is by capacitance short-circuit in parallel with load in receiving end equipment, 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 is determined the direct voltage on supply lines according to the magnitude of voltage of described square wave current, the direct voltage that output voltage is deducted on supply lines obtains far-end voltage, far-end voltage and far-end voltage stabilizing value are compared, and make far-end voltage consistent with described far-end voltage stabilizing value according to comparative result adjustment output voltage.
9. method according to claim 8, is characterized in that, described far-end detects controller provides multiplexing square wave current in described direct current output to comprise according to the current value of described direct current output:
The current value of described far-end detection controller described direct current output is according to a certain percentage determined the peak-to-peak value of described square wave current.
10. method according to claim 8, is characterized in that, described power module determines that according to the magnitude of voltage of described square wave current the direct voltage on supply lines comprises:
Direct voltage on the ratio-dependent supply lines that described power module becomes with the current value of direct current output according to the peak-to-peak value of the magnitude of voltage of described square wave current and described square wave current.
11. methods according to claim 8, is characterized in that, described power module is adjusted output voltage according to comparative result and made far-end voltage and described far-end voltage stabilizing value consistent comprising:
Described power module, when far-end voltage is greater than far-end voltage stabilizing value, reduces output voltage, to reduce far-end voltage, makes 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 output voltage, to improve far-end voltage, makes far-end voltage consistent with described far-end voltage stabilizing value.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| 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 |
| CN110266103A (en) * | 2019-05-28 | 2019-09-20 | 华信咨询设计研究院有限公司 | A kind of 5G power supply system for communications and its control method |
| CN110762794A (en) * | 2019-10-31 | 2020-02-07 | 广东美的制冷设备有限公司 | Power supply voltage determining method and device, compressor and air conditioner |
| CN114624634A (en) * | 2022-05-17 | 2022-06-14 | 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105357017A (en) * | 2015-11-16 | 2016-02-24 | 上海斐讯数据通信技术有限公司 | System and method for stabilizing POE (power over Ethernet) power supply voltage |
| 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 |
| CN110266103A (en) * | 2019-05-28 | 2019-09-20 | 华信咨询设计研究院有限公司 | A kind of 5G power supply system for communications and its control method |
| CN110762794A (en) * | 2019-10-31 | 2020-02-07 | 广东美的制冷设备有限公司 | Power supply voltage determining method and device, compressor and air conditioner |
| 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 |
| CN114624634A (en) * | 2022-05-17 | 2022-06-14 | 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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