CN101753319B - Network equipment - Google Patents
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- CN101753319B CN101753319B CN 200810187205 CN200810187205A CN101753319B CN 101753319 B CN101753319 B CN 101753319B CN 200810187205 CN200810187205 CN 200810187205 CN 200810187205 A CN200810187205 A CN 200810187205A CN 101753319 B CN101753319 B CN 101753319B
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Abstract
The invention relates to network equipment which is applied to an Ethernet power supply system, and can be connected with a plurality of network cables; the network cables can respectively transmit a network signal and DC power carried on the network signal; the network equipment comprises a plurality of Ethernet connecting ports, a transformation module, a signal processing circuit and a power supply module, wherein the Ethernet connecting ports are connected with the network cables and respectively receive the network signals and DC power therein. The transformation module is coupled with the Ethernet connecting ports, separates the network signals received by the Ethernet connecting ports from the DC power, and outputs the signals to the signal processing circuit and the power supply module. The signal processing circuit receives the network signals and processes the signals, and the power supply module receives the DC power and accumulates the DC power to be used by the network equipment. The network equipment has the advantage of providing stable output voltage with quite high output power.
Description
Technical field
The present invention relates to a kind of network equipment, particularly relate to a kind of network equipment of Ethernet.
Background technology
Power over Ethernet (Power Over Ethernet, POE) refer under existing Ethernet wiring infrastructure, follow the IEEE802.3af international standard, at transmission of data signals in the terminal equipment (such as radio network router, web camera or the networking telephone etc.), kind equipment provides the technology of direct current supply for this reason, thus, as long as terminal equipment connects grid line and just can work, and need not be more in addition plug or battery provide terminal equipment required power supply, very convenient.
According to the IEEE802.3af international standard, a complete Power over Ethernet system comprises feeder ear equipment (PowerSourcing Equipment, PSE) and receiving end equipment (Powered Device, PD), consult Fig. 1, Fig. 2 and Fig. 3, the mode of its power supply is divided into two kinds, a kind of is terminal cross-over connection method (End-Span, as shown in Figures 1 and 2), the transmission direct current is to receiving end equipment 92 in the transmission of data, 92 ', another kind then is that (Mid-Span as shown in Figure 3), transmits direct current by mid-span feeder ear equipment (Midspan PSE) 94 to the mid-span method.
The Power over Ethernet system also has two kinds by the principle of cable power supply, a kind of is first and second pin and the 3rd, six pin powereds (as shown in Figure 1) by feeder ear equipment 91, another kind then is fourth, fifth pin and the 7th, eight pin powereds (as shown in Figure 2) by feeder ear equipment 91 ', what pay special attention to is, Arabic numerals among Fig. 1 and Fig. 2 (1,2...8) are the pins of standard five classes (Catalog 5) grid line.Consult Fig. 1, when by first and second pin and the 3rd, six pin powereds, power generation device 93 is added in the mid point of transformer 95, does not affect transfer of data, and first and second pin and the 3rd, six pins can be any polarity.Consult Fig. 2, when by fourth, fifth pin and the 7th, eight pin powereds, fourth, fifth pin is connected to the positive pole of power generation device 93 ', and the 7th, eight pins then are connected to the negative pole of power generation device 93 '.
In addition, standard according to IEEE802.3af, it is 15.4 watts that feeder ear equipment can provide the maximum power of receiving end equipment, that is to say, the required power of receiving end equipment must be lower than 15.4 watts, if be higher than 15.4 watts of then by this standard power supplies, but so restriction will more and more can't be satisfied the now demand of receiving end equipment.It is worth mentioning that the power supply change-over device of a kind of receiving end equipment for an Ethernet electric power system of No. 095135781 patent disclosure of TaiWan, China is the application's reference frame.
Summary of the invention
Therefore, purpose of the present invention namely is to provide a kind of network equipment that can improve power output.
So, the network equipment of the present invention is applied to the Power over Ethernet system, can connect many grid lines, these grid lines can transmit respectively a network signal and and be stated from direct current power on this network signal, this network equipment comprises a plurality of Ethernets connectivity port, one voltage changing module, one signal processing circuit and a supply module, wherein, Ethernet of the present invention connectivity port can be one first Ethernet terminal and the second Ethernet terminal, connect respectively two grid lines and reception network signal and direct current power wherein, and having respectively one first to the 4th pair of pin, direct current power is at least by first pair of pin and the second pair of pin one of them or the 3rd pair of pin and the 4th pair of one of them reception of pin and output.
Voltage changing module is coupled to the first Ethernet terminal and the second Ethernet terminal, separates rear output with direct current power in order to the network signal that it is received, and wherein comprises one first transforming circuit and one second transforming circuit.Signal processing circuit then is coupled to voltage changing module, and the network signal that responsible reception transforming circuit separates also carries out signal and processes, and wherein comprises one first ethernet physical layer unit and one second ethernet physical layer unit.
The first transforming circuit is coupled between the first Ethernet terminal and the first ethernet physical layer unit and is exported by the one centre cap to first pair of pin of major general and the second pair of pin one of them or the 3rd pair of pin and the 4th pair of one of them voltage of exporting of pin.And the second transforming circuit is coupled between the second Ethernet terminal and the second ethernet physical layer unit and to first pair of pin of major general and the second pair of pin one of them or the 3rd pair of pin and the 4th pair of one of them voltage of exporting of pin by the output of one centre cap, and the centre cap of first and second transforming circuit mutually also (string) join.
Preferably, the first transforming circuit (the second transforming circuit) comprises one first transformer, the second transformer, the 3rd transformer and the 4th transformer, and it is connected across respectively between first pair of pin of the first Ethernet terminal (the second Ethernet terminal), the second pair of pin, the 3rd pair of pin and the 4th pair of pin and the first ethernet physical layer unit (the second ethernet physical layer unit).
In addition, the center tap of the first transformer of the first transforming circuit (the second transforming circuit) is exported the output voltage of first pair of pin of the first Ethernet terminal (the second Ethernet terminal), and the center tap of the second transformer of the first transforming circuit (the second transforming circuit) is exported the output voltage of second pair of pin of this first Ethernet terminal (the second Ethernet terminal), and first pair of pin and second pair of pin only have one of them output voltage at one time; In the same manner, the center tap of the 3rd transformer of the first transforming circuit (the second transforming circuit) is exported the output voltage of the 3rd pair of pin of the first Ethernet terminal (the second Ethernet terminal), and the center tap of the 4th transformer of the first transforming circuit (the second transforming circuit) is exported the output voltage of the 4th pair of pin of this first Ethernet terminal (the second Ethernet terminal), and the 3rd pair of pin and the 4th pair of pin only have one of them output voltage at one time.
Supply module is coupled to voltage changing module, and comprise four DC-DC converters, the first transformer of the first transforming circuit and the center tap of the second transformer couple a DC-DC converter, the 3rd transformer of the first transforming circuit and the center tap of the 4th transformer couple a DC-DC converter, the first transformer of the second transforming circuit and the center tap of the second transformer couple a DC-DC converter, the 3rd transformer of this second transforming circuit and the center tap of the 4th transformer couple a DC-DC converter, and the output of these DC-DC converters mutually also (string) connection.
First pair of pin of the first Ethernet terminal and the second Ethernet terminal is respectively its first pin and the second pin, second pair of pin of the first Ethernet terminal and the second Ethernet terminal is respectively its 3rd pin and the 6th pin, the 3rd pair of pin of the first Ethernet terminal and the second Ethernet terminal is respectively its 4th pin and the 5th pin, and the 4th pair of pin of the first Ethernet terminal and the second Ethernet terminal is respectively its 7th pin and the 8th pin.Effect of the present invention is, provides to have higher output power and stable output voltage.
Description of drawings
Fig. 1 is a circuit diagram, illustrates that known Power over Ethernet device is by first and second pin and the 3rd, six pin powereds;
Fig. 2 is a circuit diagram, illustrates that known Power over Ethernet device is by fourth, fifth pin and the 7th, eight pin powereds;
Fig. 3 one circuit diagram illustrates the supply power mode of known Power over Ethernet device mid-span;
Fig. 4 is a circuit block diagram, and the first preferred embodiment of the network equipment of the present invention is described;
Fig. 5 is a circuit diagram, and the internal circuit of the present invention's the first preferred embodiment is described;
Fig. 6 is a circuit diagram, and the internal circuit of the present invention's the second preferred embodiment is described;
Fig. 7 is a circuit diagram, and the internal circuit of the present invention's the 3rd preferred embodiment is described; And
Fig. 8 is a circuit diagram, and the internal circuit of the present invention's the 4th preferred embodiment is described.
The primary clustering symbol description:
10............... network equipment 264.............. the 4th transformer
1................ Ethernet connectivity port 3................ signal processing circuit
11............... the first Ethernet terminal 31............... the first ethernet physical layer unit
12............... the second Ethernet terminal 32............... the second ethernet physical layer unit
2................ voltage changing module 4................ supply module
25............... the first transforming circuit 41............... the first bridge rectifier
251.............. the first transformer 42............... the second bridge rectifier
252.............. the second transformer 43............... the 3rd bridge rectifier
253.............. the 3rd transformer 44............... the 4th bridge rectifier
254.............. the 4th transformer 51............... the first DC-DC converter
26............... the second transforming circuit 52............... the second DC-DC converter
261.............. the first transformer 53............... the 3rd DC-DC converter
262.............. the second transformer 54............... the 4th DC-DC converter
263.............. the 3rd transformer 81,82........... grid line
Embodiment
About aforementioned and other technology contents, characteristics and effect of the present invention, in the detailed description of following cooperation four preferred embodiments with reference to the accompanying drawings, can clearly present.
Before the present invention is described in detail, be noted that in the following description content similarly assembly is to represent with identical numbering.
Consult Fig. 4, be the first preferred embodiment of the network equipment of the present invention, this network equipment 10 is the receiving end equipment for the Power over Ethernet system, for example: radio access bridger (Access Point, AP), modulator-demodulator etc.In the present embodiment, this network equipment 10 connects two grid lines 81,82, and these grid lines 81,82 transmit one from feeder ear equipment (Power Sourcing Equipment, PSE) and the network signal of following the IEEE802.3af international standard, and a direct current power that is stated from this network signal, comprise a plurality of Ethernets connectivity port 1, a voltage changing module 2, a signal processing circuit 3 and a supply module 4 in the network equipment 10.
Cooperate and consult Fig. 5, the Ethernet connectivity port 1 of present embodiment is general RJ-45 terminal in the network system now, and under the IEEE802.3af international standard, every grid line can only transmit the direct current power of certain limit, so the designer can decide according to the needs of heterogeneous networks equipment 10 quantity of Ethernet connectivity port 1.In the present embodiment, the quantity of Ethernet connectivity port 1 is two, and for convenience of description, is defined as respectively the first Ethernet terminal 11 and the second Ethernet terminal 12 at this.This first Ethernet terminal 11 and the second Ethernet terminal 12 can be connected with two grid lines 81,82 respectively, and receive wherein network signal and direct current power.
The first Ethernet terminal 11 has one first pair of pin (the first pin of the first Ethernet terminal 11 and the second pin), one second pair of pin (the 3rd pin of the first Ethernet terminal 11 and the 6th pin), one the 3rd pair of pin (the 4th pin of the first Ethernet terminal 11 and the 5th pin) and one the 4th pair of pin (the 7th pin of the first Ethernet terminal 11 and the 8th pin), and receives network signal and direct current power and the output that grid line 11 transmits by first pair of pin and the 3rd pair of pin.Certainly, the first Ethernet terminal 11 can only receive network signal and direct current power by first pair of pin or second pair of pin, also or only received by the 3rd pair of pin or the 4th pair of pin, so long as the first pair of pin and the second pair of pin one of them and the 3rd pair of pin and the 4th pair of pin one of them receive network signal and direct current power and output and get final product.
The architecture of the second Ethernet terminal 12 is identical with the first Ethernet terminal 11, also has one first pair of pin (the first pin of the second Ethernet terminal 12 and the second pin), one second pair of pin (the 3rd pin of the second Ethernet terminal 12 and the 6th pin), one the 3rd pair of pin (the 4th pin of the second Ethernet terminal 12 and the 5th pin) and one the 4th pair of pin (the 7th pin of the second Ethernet terminal 12 and the 8th pin), and by first pair of pin and the 3rd pair of network signal and direct current power and the output that pin reception grid line 12 transmits.
The first transforming circuit 25 is coupled to the first Ethernet terminal 11 and has one and is connected across the first pair of pin of the first Ethernet terminal 11 and the first transformer 251, between the first ethernet physical layer unit 31 and is connected across the second pair of pin of the first Ethernet terminal 11 and the 3rd transformer 253 and that the second transformer 252, between the first ethernet physical layer unit 31 is connected across the 3rd pair of pin between the first Ethernet terminal 11 and the first ethernet physical layer unit 31 and is connected across the 4th pair of pin of the first Ethernet terminal 11 and the 4th transformer 254 between the first ethernet physical layer unit 31.
With 251 explanations of the first transformer, will be sent to the first ethernet physical layer unit 31 by the first transformer 251 from the network signal of first pair of pin of the first Ethernet terminal 11 processes, and direct current power will be blocked in a side of the first transformer 251, and the one first output OP1 that is pulled out by the center tap of this first transformer 251 output, that is to say that the network signal that first pair of pin of the first Ethernet terminal 11 outputs to and direct current power will separate by the first transformer 251.Similarly, the one second output OP2 output that can pull out from the center tap of the second transformer 252 of the direct current power exported of the second pair of pin; The 3rd pair of direct current power that pin is exported can be exported from one the 3rd output OP3 that the center tap of the 3rd transformer 253 is pulled out; The 4th pair of direct current power that pin is exported can be exported from one the 4th output OP4 that the center tap of the 4th transformer 254 is pulled out.And because present embodiment only receives also output DC power by first pair of pin and the 3rd pair of pin, so the voltage that the second output OP2 and the 4th output OP4 export can be zero.
The second transforming circuit 26 is coupled to the second Ethernet terminal 12 and has one and is connected across the first pair of pin of the second Ethernet terminal 12 and the first transformer 261 between the second ethernet physical layer unit 32, one is connected across the second pair of pin of the second Ethernet terminal 12 and the second transformer 262 between the second ethernet physical layer unit 32, one is connected across the 3rd pair of pin of the second Ethernet terminal 12 and the 3rd transformer 263 between the second ethernet physical layer unit 32, and one is connected across the 4th pair of pin of the second Ethernet terminal 12 and the 4th transformer 264 between the second ethernet physical layer unit 32.
The principle of the second transforming circuit 26 is identical with the first transforming circuit 25, and the direct current power that first pair of pin of the second Ethernet terminal 12 exported can be exported from the one first output OP1 ' that the center tap of the first transformer 261 is pulled out; The direct current power that second pair of pin of the second Ethernet terminal 12 exported can be exported from the one second output OP2 ' that the center tap of the second transformer 262 is pulled out; The 3rd pair of direct current power that pin is exported of the second Ethernet terminal 12 can be exported from one the 3rd output OP3 ' that the center tap of the 3rd transformer 263 is pulled out; The 4th pair of direct current power that pin is exported of the second Ethernet terminal 12 can be exported from one the 4th output OP4 ' that the center tap of the 4th transformer 264 is pulled out.In the same manner, present embodiment is to be received and output DC power by first pair of pin and the 3rd pair of pin, so the voltage that the second output OP2 ' and the 4th output OP4 ' export is zero because of output DC power not.
Certainly, first and second can also share same transformer to pin in the first Ethernet terminal 11, be about to that the first pin is connected with the 3rd pin and the second pin is connected with the 6th pin, and the first pin and the second pin are coupled to transformer, and also one of them is exported from its center tap; In the same manner, the 3rd and the 4th pair of pin can also share same transformer, is about to that the 4th pin is connected with the 7th pin and the 5th pin is connected with the 8th pin, and the 4th pin and the 5th pin are coupled to transformer, and also one of them is exported from its center tap.And the second Ethernet terminal 12 can also identical principle reduce the quantity of transformer, so repeat no more.
And it is worth mentioning that, all transformers in the voltage changing module 2 are except separated network signal and direct current power, also can be used for isolating Ethernet connectivity port 1 and signal processing circuit 3, so that be coupled to the work that voltage changing module 2 supply module 4 afterwards can not have influence on signal processing circuit 3, and the turn ratio of all transformers is all 1: 1.Therefore, can be identical with the received direct current power in Ethernet connectivity port 1 by the voltage of the output output of the center tap of transformer.
In addition, because the first Ethernet terminal 11 (or second Ethernet terminal 12) is that to receive direct current power by first pair of pin or the second pair of pin be to be determined by feeder ear equipment, that is to say, the received voltage level of the first pair of pin can be according to different feeder ear equipment and change between the voltage of direct current power or no-voltage, so can cause and can't correctly power to receiving end equipment.Similarly, the 3rd pair of pin also has identical problem with the 4th pair of pin, and therefore, signal demand carries out first rectification can guarantee that just receiving end equipment obtains correct signal (or no-voltage).
Therefore, supply module 4 includes the 4th bridge rectifier 44 that the 3rd bridge rectifier 43, that the second bridge rectifier 42, that first bridge rectifier 41, that is coupled to the center tap of the first transformer 251 of the first transforming circuit 25 and the second transformer 252 is coupled to the center tap of the 3rd transformer 253 of the first transforming circuit 25 and the 4th transformer 254 is coupled to the center tap of the first transformer 261 of the second transforming circuit 26 and the second transformer 262 is coupled to the center tap of the 3rd transformer 263 of the second transforming circuit 26 and the 4th transformer 264.
Four bridge rectifiers 41～44 are comprised of four diode D1～D4 respectively, wherein, the anode of the diode D1 of the first bridge rectifier 41 is connected the first output OP1 of the first transformer 251 with the negative electrode of diode D4, the anode of diode D3 is connected the second output OP2 of the second transformer 252 with the negative electrode of diode D2, the negative electrode of diode D1 is connected the positive pole of the output of the first bridge rectifier 41 with the negative electrode of diode D3, the negative pole of the output of anodic bonding the first bridge rectifier 41 of the anode of diode D2 and diode D4, the first bridge rectifier 41 is for the output voltage of the second output OP2 of the first output OP1 that integrates the first transformer 251 and the second transformer 252.
Similarly, the anode of the diode D1 of the second bridge rectifier 42 is connected the 3rd output OP3 of the 3rd transformer 253 with the negative electrode of diode D4, the anode of diode D3 is connected the 4th output OP4 of the 4th transformer 254 with the negative electrode of diode D2, the negative electrode of diode D1 is connected the positive pole of the output of the second bridge rectifier 42 with the negative electrode of diode D3, the negative pole of the output of anodic bonding the second bridge rectifier 42 of the anode of diode D2 and diode D4,42 output voltages for the 4th output OP4 of the 3rd output OP3 that integrates the 3rd transformer 253 and the 4th transformer 254 of the second bridge rectifier.
In the same manner, the anode of the diode D1 of the 3rd bridge rectifier 43 is connected the first output OP1 ' of the first transformer 261 with the negative electrode of diode D4, the anode of diode D3 is connected the second output OP2 ' of the second transformer 262 with the negative electrode of diode D2, the negative electrode of diode D1 is connected the positive pole of the output of the 3rd bridge rectifier 43 with the negative electrode of diode D3, the negative pole of the output of anodic bonding the 3rd bridge rectifier 43 of the anode of diode D2 and diode D4.The 3rd bridge rectifier 43 is used for integrating the first output OP1 ' of the first transformer 261 and the output voltage of the second output OP2 ' of the second transformer 262.
The anode of the diode D1 of the 4th bridge rectifier 44 is connected the 3rd output OP3 ' of the 3rd transformer 263 with the negative electrode of diode D4, the anode of diode D3 is connected the 4th output OP4 ' of the 4th transformer 264 with the negative electrode of diode D2, the negative electrode of diode D1 is connected the positive pole of the output of the 4th bridge rectifier 44 with the negative electrode of diode D3, the negative pole of the output of anodic bonding the 4th bridge rectifier 44 of the anode of diode D2 and diode D4, therefore, the 4th bridge rectifier 44 is used for integrating the 3rd output OP3 ' of the 3rd transformer 263 and the output voltage of the 4th output OP4 ' of the 4th transformer 264.
With the first bridge rectifier 41, if first pair of pin of the first Ethernet terminal 11 receives direct current power and second pair of pin is no-voltage output, then exported by the first output OP1 of the first transformer 251 and the second output OP2 of the second transformer 252 respectively, so that diode D1 and D2 can open (D3 and D4 are for closing), namely the output voltage of the first bridge rectifier 41 is the voltage that the first output OP1 exports; Otherwise if first pair of pin output no-voltage and second pair of pin receive direct current power, diode D3 and D4 then can open (D1 and D2 are for closing), so the voltage that the output voltage of the first bridge rectifier 41 can be exported for the second output OP2; In like manner, the bridge rectifier operation of its excess-three is all identical with the first bridge rectifier 41, so repeat no more.
Importantly, the first bridge rectifier 41 of present embodiment and the output head anode of the second bridge rectifier 42 interconnect, the negative pole of output end of the first bridge rectifier 41 and the second bridge rectifier 42 interconnects, the output head anode of the 3rd bridge rectifier 43 and the 4th bridge rectifier 44 interconnects, and the negative pole of output end of the 3rd bridge rectifier 43 and the 4th bridge rectifier 44 interconnects.Therefore, with regard to the first Ethernet terminal 11, it is to receive direct current power by first pair of pin and the 3rd pair of pin, again according to the standard of IEEE802.3af, singlely can provide 15.4 watts power to the received direct current power maximum of pin, so the output end voltage Vo1 that is produced by the first bridge rectifier 41 and the 42 output parallel connections of the second bridge rectifier is constant, but electric current can double, thereby can supply the power that doubles, namely 30.8 watts power is to receiving end equipment.In the same manner, the current summation that produces of the 3rd bridge rectifier 43 and 44 parallel connections of the 4th bridge rectifier also exportable 30.8 watts power to receiving end equipment.
Moreover, the supply module 4 of present embodiment also comprises two DC-DC converters 51,52, wherein, the output that the first bridge rectifier 41 and the second bridge rectifier 42 connect couples one of them DC-DC converter 51, the output that the 3rd bridge rectifier 43 and the 4th bridge rectifier 44 connect couples wherein another DC-DC converter 52, be used for providing receiving end equipment one stable supply voltage, in addition, two DC-DC converters 51,52 output interconnects (output parallel connection, be that positive pole interconnects and negative pole interconnects) and produce this supply voltage Vout, because two DC-DC converters 51,52 output can provide respectively 30.8 watts power, therefore, the network equipment 10 can provide 61.6 watts power.
In other words, if only receive direct current power by first pair of pin in the first Ethernet terminal 11 (the second Ethernet terminal 12), then the first output maximum can provide 15.4 watts power, so supply voltage Vout can be because of two DC-DC converters 51,52 parallel with one another so that its power that can provide is 30.8 watts.Certainly, the quantity of Ethernet connectivity port 1 can also be N (N＞2), as long as each Ethernet connectivity port 1 receives respectively a direct current power, and the output of supply module 4 is parallel with one another, can obtain the power of N * 30.8 watt (if only have pair of pins to receive direct current power in the Ethernet connectivity port 1, the power that then can supply is N * 15.4 watt), thus, the network equipment 10 can obtain higher power.In addition, the network equipment 10 of present embodiment is to follow the IEEE802.3af international standard, certainly also can be used on the international standard of IEEE802.3at, not as limit.
It is worth mentioning that, the electric power that supply module 4 produces is be used to being supplied to the whole network equipment 10, because the electric power difference that each circuit (for example: Ethernet connectivity port 1, signal processing circuit 3 etc.) is required, so the network equipment 10 of present embodiment also can comprise an electric power management circuit (not shown), the electric power that produces in order to receive supply module 4, and according to this electric power of demand assignment of different circuit to each circuit.
Consult Fig. 6, internal circuit diagram for the second preferred embodiment of the network equipment of the present invention, roughly identical with the first preferred embodiment, its difference is, each bridge rectifier can carry out its output being in parallel after the voltage stabilizing through DC-DC converter first again, that is the supply module of present embodiment is to connect a DC-DC converter 51～54 at the output of each bridge rectifier respectively, output parallel connection with each DC-DC converter 51～54 (is that output head anode interconnects again, the negative pole of output interconnects), the addition so that the electric current that the output of each bridge rectifier is exported is connected in parallel to each other is to obtain 15.4 * 4=61.6 watt power output.Similarly, if the quantity of the Ethernet connectivity port 1 of the network equipment of present embodiment 10 is N (N＞2), as long as the output of supply module is parallel with one another, can obtain the power of N * 30.8 watt (if only have pair of pins to receive direct current power in the Ethernet connectivity port 1, the power that then can supply is N * 15.4 watt), so still be not limited with two Ethernet terminals 11,12.
Consult Fig. 7, internal circuit diagram for the 3rd preferred embodiment of the network equipment of the present invention, roughly identical with the first preferred embodiment, its difference is, the first preferred embodiment is to utilize the output parallel connection of each bridge rectifier so that current summation and improve power output, and present embodiment then is that output series connection with each bridge rectifier is so that power output improves in voltage phase Calais.Therefore, as shown in Figure 6, the negative pole of the output of the first bridge rectifier 41 (the 3rd bridge rectifier 43) connects the positive pole of the output of the second bridge rectifier 42 (the 4th bridge rectifier 44).
In addition, the positive pole of the output of the first bridge rectifier 41 is connected the first DC-DC converter 51 with the negative pole of the output of the second bridge rectifier 42, and the positive pole of the output of the 3rd bridge rectifier 43 of second source change-over circuit 22 is connected the second DC-DC converter 52 with the negative pole of the output of the 4th bridge rectifier 44, negative pole with the output of the first DC-DC converter 51 is connected with the positive pole of the output of the second DC-DC converter 52 again, namely the output of two DC-DC converters is connected mutually, so that the voltage Vo1 of output and Vo2 addition, and then 1 power output that can provide of the increase network equipment, similarly, as long as N of series connection of DC-DC converter (N＞1), and each Ethernet connectivity port 1 receives respectively a direct current power, can obtain the power of N * 30.8 watt (if only have pair of pins to receive direct current power in the Ethernet connectivity port 1, the power that then can supply is N * 15.4 watt), so the network equipment 10 can obtain higher power.
Consult Fig. 8, internal circuit diagram for the 4th preferred embodiment of the network equipment of the present invention, roughly identical with the 3rd preferred embodiment, its difference is, bridge rectifier 41～44 can carry out the output of DC-DC converter 51～54 being connected after the voltage stabilizing through a DC-DC converter 51～54 first separately again, can supply 15.4 * 4=61.6 watt power output.
In sum, the network equipment 10 of present embodiment utilizes a plurality of Ethernets connectivity port 1 to receive respectively a direct current electric power, export behind the output series/parallel with its supply module 4 again, can providing network devices 10 higher power outputs and be not subjected to the restriction of IEEE802.3af international standard.
The above-described content of thought, it only is preferred embodiment of the present invention, can not limit scope of the invention process with this, i.e. every simple equivalent variations and modification of doing according to claims scope of the present invention and invention description content all still belongs in the scope that patent of the present invention contains.
Claims (9)
1. network equipment, be applied to the Power over Ethernet system, couple many grid lines, described these grid lines can transmit respectively a network signal and and be stated from direct current power on the described network signal, and described direct current power is less than the required electric power of described network device driver, and the described network equipment comprises:
A plurality of Ethernets connectivity port couples described these grid lines and reception network signal and direct current power wherein;
One voltage changing module is coupled to described a plurality of Ethernets connectivity port, and the network signal that described these Ethernet connectivity ports are received separates rear output with direct current power;
One signal processing circuit is coupled to described voltage changing module, and described signal processing circuit receives the network signal that described voltage changing module separates and carries out signal and process; And
One supply module, be coupled to described voltage changing module, described supply module comprises one first bridge rectifier and one second bridge rectifier, described supply module receives the direct current power that described voltage changing module separates, and the output series/parallel by described supply module will described these direct current powers mutually cumulative after the described network equipment of supply;
By this, described a plurality of Ethernets connectivity port receives direct current power and mutual the adding up that described many grid lines transmit, so that a plurality of direct current power superposition becomes to be enough to drive the electric power of the described network equipment; Wherein, described these Ethernet connectivity ports are one first Ethernet terminal and one second Ethernet terminal, described the first Ethernet terminal and described the second Ethernet terminal have respectively one first to the 4th pair of pin, and described network signal and direct current power are at least by described first pair of pin and the second pair of pin one of them or described the 3rd pair of pin and the 4th pair of one of them reception of pin and output; Wherein, described voltage changing module comprises:
One first transforming circuit, be coupled between described the first Ethernet terminal and the described signal processing circuit and to the described first pair of pin of major general and described second pair of pin one of them or described the 3rd pair of pin and described the 4th pair of one of them voltage of exporting of pin by the output of one centre cap, and
One second transforming circuit is coupled between described the second Ethernet terminal and the described signal processing circuit and is exported by the one centre cap to the described first pair of pin of major general and described second pair of pin one of them or described the 3rd pair of pin and described the 4th pair of one of them voltage of exporting of pin; Wherein, described the first transforming circuit comprises:
One is connected across first pair of pin of described the first Ethernet terminal and the first transformer between the described signal processing circuit, and
One is connected across second pair of pin of described the first Ethernet terminal and the second transformer between the described signal processing circuit,
The center tap of the first transformer of described the first transforming circuit is exported the output voltage of first pair of pin of described the first Ethernet terminal, the center tap of the second transformer of described the first transforming circuit is exported the output voltage of second pair of pin of described the first Ethernet terminal
Described the second transforming circuit comprises:
One is connected across first pair of pin of described the second Ethernet terminal and the first transformer between the described signal processing circuit, and
One is connected across second pair of pin of described the second Ethernet terminal and the second transformer between the described signal processing circuit,
The center tap of the first transformer of described the second transforming circuit is exported the output voltage of first pair of pin of described the second Ethernet terminal, the center tap of the second transformer of described the second transforming circuit is exported the output voltage of second pair of pin of described the second Ethernet terminal, and described first pair of pin and second pair of pin only have one of them output voltage at one time.
2. the network equipment according to claim 1, wherein,
Described the first transforming circuit also comprises:
One is connected across the 3rd pair of pin of described the first Ethernet terminal and the 3rd transformer between the described signal processing circuit, and
One is connected across the 4th pair of pin of described the first Ethernet terminal and the 4th transformer between the described signal processing circuit,
The center tap of the 3rd transformer of described the first transforming circuit is exported the output voltage of the 3rd pair of pin of described the first Ethernet terminal, the center tap of the 4th transformer of described the first transforming circuit is exported the output voltage of the 4th pair of pin of described the first Ethernet terminal
Described the second transforming circuit also comprises:
One is connected across the 3rd pair of pin of described the second Ethernet terminal and the 3rd transformer between the described signal processing circuit, and
One is connected across the 4th pair of pin of described the second Ethernet terminal and the 4th transformer between the described signal processing circuit,
The center tap of the 3rd transformer of described the second transforming circuit is exported the output voltage of the 3rd pair of pin of described the second Ethernet terminal, the center tap of the 4th transformer of described the second transforming circuit is exported the output voltage of the 4th pair of pin of described the second Ethernet terminal, and described the 3rd pair of pin and the 4th pair of pin only have one of them output voltage at one time.
3. the network equipment according to claim 1, wherein, described the first bridge rectifier is coupled to the first transformer of described the first transforming circuit and the center tap of the second transformer, and described the second bridge rectifier is coupled to the first transformer of described the second transforming circuit and the center tap of the second transformer.
4. the network equipment according to claim 3, wherein, described supply module also comprises two DC-DC converters, is respectively coupled to described the first bridge rectifier and the second bridge rectifier, and the mutual series/parallel of the output of described these DC-DC converters.
5. the network equipment according to claim 2, wherein, described the first bridge rectifier is coupled to the first transformer of described the first transforming circuit and the center tap of the second transformer, described the second bridge rectifier is coupled to the 3rd transformer of described the first transforming circuit and the center tap of the 4th transformer, and described supply module also comprises:
One the 3rd bridge rectifier is coupled to the first transformer of described the second transforming circuit and the center tap of the second transformer, and
One the 4th bridge rectifier is coupled to the 3rd transformer of described the second transforming circuit and the center tap of the 4th transformer.
6. the network equipment according to claim 5, wherein, described supply module also comprises four DC-DC converters, be respectively coupled to described the first bridge rectifier, described the second bridge rectifier, described the 3rd bridge rectifier and the 4th bridge rectifier, and the mutual series/parallel of the output of described these DC-DC converters.
7. the network equipment according to claim 5, wherein, described supply module also comprises two DC-DC converters, couple a DC-DC converter wherein after the output of the output of described the first bridge rectifier and described the second bridge rectifier is parallel with one another, couple a DC-DC converter wherein after the output of the output of described the 3rd bridge rectifier and described the 4th bridge rectifier is parallel with one another, and the mutual series/parallel of the output of described these DC-DC converters.
8. according to claim 6 or the 7 described network equipments, wherein, first pair of pin of described the first Ethernet terminal and described the second Ethernet terminal is respectively its first pin and the second pin, second pair of pin of described the first Ethernet terminal and described the second Ethernet terminal is respectively its 3rd pin and the 6th pin, the 3rd pair of pin of described the first Ethernet terminal and described the second Ethernet terminal is respectively its 4th pin and the 5th pin, and the 4th pair of pin of described the first Ethernet terminal and described the second Ethernet terminal is respectively its 7th pin and the 8th pin.
9. the network equipment according to claim 8, wherein, described the first Ethernet terminal and described the second Ethernet terminal are all a RJ-45 terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810187205 CN101753319B (en) | 2008-12-18 | 2008-12-18 | Network equipment |
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| CN 200810187205 CN101753319B (en) | 2008-12-18 | 2008-12-18 | Network equipment |
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| CN101753319A CN101753319A (en) | 2010-06-23 |
| CN101753319B true CN101753319B (en) | 2013-01-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102710425B (en) * | 2011-03-28 | 2015-03-04 | 启碁科技股份有限公司 | Ethernet power relay system, feeder device and access bridging device |
| CN102447492A (en) * | 2011-11-18 | 2012-05-09 | 北京志翔领驭科技有限公司 | Wiring apparatus of humiture monitoring terminal |
| CN103023663A (en) * | 2012-12-07 | 2013-04-03 | 中兴通讯股份有限公司 | Router power supply device and router power supply device method |
| CN110460449B (en) * | 2018-05-08 | 2021-07-20 | 杭州海康威视数字技术股份有限公司 | Repeater and power supply method |
| CN113362725A (en) * | 2020-03-04 | 2021-09-07 | 隆达电子股份有限公司 | Spliced display module |
| CN113541328A (en) * | 2021-07-08 | 2021-10-22 | 北京零壹空间电子有限公司 | Power supply and communication device and system of electric equipment on arrow |
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