CN112953730B - Power supply and communication integrated transmission system - Google Patents
Power supply and communication integrated transmission system Download PDFInfo
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- CN112953730B CN112953730B CN202110110199.3A CN202110110199A CN112953730B CN 112953730 B CN112953730 B CN 112953730B CN 202110110199 A CN202110110199 A CN 202110110199A CN 112953730 B CN112953730 B CN 112953730B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract
The invention provides a power supply and communication integrated transmission system, which comprises a switching circuit and a transmission cable, wherein the switching circuit is connected with the transmission cable; the switching circuit is respectively connected with a power supply and a signal source and is also connected with one end of the transmission cable; the other end of the transmission cable is used for connecting electronic equipment; the switching circuit is used for: outputting power supply to the transmission cable according to the alternating current provided by the power supply; and: transmitting a communication signal between the signal source and the transmission cable; the transmission cable is used for: and transmitting the power supply to the electronic equipment, and transmitting the communication signal between the switching circuit and the electronic equipment.
Description
Technical Field
The invention relates to the field of power supply and communication among devices, in particular to a power supply and communication integrated transmission system.
Background
Along with the rapid development of electronic equipment, the electronic equipment that emerges in the market is of a great variety, and these electronic equipment mostly need the cable to connect, install and just can realize specific function in the assigned position, for example be applied to the intelligent cutting head of laser cutting trade, need the power supply on the one hand, need with host computer communication on the one hand, how to work a telephone switchboard more rationally one of the urgent problem of solution in order to the industry.
There are two wiring schemes in the prior art:
one is a cable splitting scheme, that is, two cable interfaces are designed on the device and are respectively used for communication and power supply, and correspondingly, two different cables for communication and power supply need to be adopted, but the scheme occupies larger space resources and needs to pay larger cable cost;
secondly, the POE scheme, under the condition that adopts same cable promptly, superpose communication signal on the power supply, however this scheme is subject to POE power supply standard, and the user can't adjust the power supply voltage value in a flexible way, in addition, need the additional and complicated POE support module of design at cable subassembly both ends, just can satisfy POE power supply standard again when realizing signal stack, nevertheless can bring the higher problem of cost.
Therefore, the prior art cannot effectively meet the requirements of low cost, flexibility of voltage and the like.
Disclosure of Invention
The invention provides a power supply and communication integrated transmission system, which aims to solve the problem that requirements of low cost, voltage flexibility and the like cannot be effectively considered.
According to a first aspect of the present invention, a power supply and communication integrated transmission system is provided, which includes a switching circuit and a transmission cable;
the switching circuit is respectively connected with a power supply and a signal source and is also connected with one end of the transmission cable; the other end of the transmission cable is used for connecting electronic equipment;
the switching circuit is used for: outputting power to the transmission cable according to the direct current provided by the power supply; transmitting a communication signal between the signal source and the transmission cable, and filtering the transmitted power supply and communication signal respectively;
the transmission cable is used for: and transmitting the power supply to the electronic equipment, and transmitting the communication signal between the switching circuit and the electronic equipment.
Optionally, the switching circuit includes a power supply filtering unit, a communication filtering unit and a connector;
the transmission cable comprises a power wire core group and a communication wire core group;
the input side of the power supply filtering unit is connected with the power supply, and the output side of the power supply filtering unit is connected with one end of the power cord core group through the connector; one side of the communication filtering unit is connected with the signal source, and the other side of the communication filtering unit is connected with one end of the communication wire core group through the connector.
Optionally, the connector comprises a plurality of communication connection parts for connecting the communication conductor core groups and a plurality of power connection parts for connecting the power conductor core groups;
the plurality of communication connection parts comprise a first communication connection part, a second communication connection part, a third communication connection part and a fourth communication connection part;
the plurality of power connection portions include a first power connection portion, a second power connection portion, a third power connection portion, and a fourth power connection portion;
the second communication connecting part, the third communication connecting part, the fourth communication connecting part, the first power supply connecting part, the second power supply connecting part, the third power supply connecting part and the fourth power supply connecting part are distributed around the first communication connecting part in sequence;
the first communication connecting part and the second communication connecting part are connected with a pair of communication wire cores for transmitting a first differential signal; the third communication connecting part and the fourth communication connecting part are connected with a pair of wire cores for transmitting a second differential signal; the first power supply connecting part and the second power supply connecting part are grounded through the power supply filtering unit, and the third power supply connecting part and the fourth power supply connecting part are connected with the anode of the output side of the power supply filtering unit.
Optionally, the power supply filtering unit includes a power supply differential mode filtering module and a power supply common mode filtering module;
the input side of the power supply differential mode filtering module is connected with the power supply, the output side of the power supply differential mode filtering module is connected with the input side of the power supply common mode filtering module, and the output side of the power supply common mode filtering module is connected with the power supply wire core group through the connector.
Optionally, the power supply differential mode filtering module includes a first voltage dependent resistor and a first capacitor;
two ends of the first piezoresistor are connected between the anode and the cathode of the power supply;
the first capacitor is connected in parallel to the first piezoresistor.
Optionally, the power supply filtering unit further includes a surge protection module, where the surge protection module includes a second voltage dependent resistor, a third voltage dependent resistor, a fuse, a gas discharge tube, a second capacitor, and a third capacitor;
the first end of the second piezoresistor is connected with the positive electrode of the power supply, the second end of the second piezoresistor is connected with the first end of the fuse, the second end of the fuse is connected with the first end of the gas discharge tube, and the second end of the gas discharge tube is grounded;
the first end of the third piezoresistor is connected with the negative electrode of the power supply, and the second end of the third piezoresistor is connected with the first end of the fuse;
the first end of the second capacitor is connected to the negative electrode of the power supply, and the second end of the second capacitor is grounded;
and the first end of the third capacitor is connected with the anode of the power supply, and the second end of the third capacitor is grounded.
Optionally, the power supply common-mode filtering module includes a first-stage power supply common-mode inductor and a second-stage power supply common-mode inductor;
the input side of the first-stage power supply common-mode inductor is connected to the output side of the power supply differential-mode filtering module, the input side of the second-stage power supply common-mode inductor is connected to the output side of the first-stage power supply common-mode inductor, and the output side of the second-stage power supply common-mode inductor is connected to the power supply core group through the connector.
Optionally, the communication filtering unit includes a signal common mode filtering module and a signal differential mode filtering module;
the first side of the signal common mode filtering module is connected with the signal source, and the second side of the signal common mode filtering module is connected with the communication wire core group through the connector; the first side of the signal differential mode filtering module is connected with the first side of the signal common mode filtering module; and the second side of the signal differential mode filtering module is connected with the second side of the signal common mode filtering module.
Optionally, the signal common-mode filtering module includes a first-stage communication common-mode inductor and a second-stage communication common-mode inductor;
the first side of the first-stage communication common-mode inductor and the first side of the second-stage communication common-mode inductor are both connected with the signal source, and the second side of the first-stage communication common-mode inductor and the second side of the second-stage communication common-mode inductor are respectively connected with the communication wire core group through the connectors.
Optionally, the signal differential-mode filtering module includes a first TVS unit, a second TVS unit, and an integrated TVS chip; the first TVS unit and the second TVS unit are both bidirectional conductive TVS units;
two ends of the first TVS unit are respectively connected with two ends of a first side of the second-stage communication common-mode inductor; two ends of the second TVS unit are respectively connected with two ends of a first side of the first-stage communication common-mode inductor;
and four ends of the integrated TVS chip are respectively connected with two ends of the second side of the second-stage communication common-mode inductor and two ends of the second side of the first-stage communication common-mode inductor.
The power supply and communication integrated transmission system provided by the invention can integrate the power supply function and the communication transmission function into one cable through the switching circuit and the transmission cable, avoids the adoption of two cables for respectively transmitting power supply and communication signals, effectively saves the cost and the wiring space, simultaneously, as the switching circuit is matched with the transmission cable to respectively transmit the power supply and the communication signals, the superposition of electric signals between the power supply and the communication signals can not occur, and as the POE standard is not required to be met, the positive effect of flexible and variable voltage can also be achieved, in addition, as other complex circuits (such as a POE support module) are introduced without the superposition of electric signals, the positive effects of saving the cost, simplifying the circuits and the like are further achieved.
In the invention, the switching circuit can also filter power supply and communication signals (such as the introduction of a power supply related filtering module and a signal related filtering module), and has stronger filtering capability, so that the anti-interference capability of the transmission system is enhanced while single-wire power supply and communication transmission are realized.
In a further scheme, the invention provides the connector, the power wire core group and the communication wire core group can be reasonably distributed, so that the interference of a power wire on communication signals in the transmission process is reduced, and the anti-electromagnetic interference capability of the system is further optimized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1a is a schematic structural diagram of a power supply and communication integrated transmission system according to an embodiment of the present invention;
fig. 1b is a schematic structural diagram of a transmission system integrating power supply and communication according to an embodiment of the present invention;
fig. 2 is a third schematic structural diagram of a power supply and communication integrated transmission system according to an embodiment of the present invention;
FIG. 3 is a schematic view of a connector according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a power supply and communication integrated transmission system according to an embodiment of the present invention;
fig. 5 is a fifth schematic structural diagram of a power supply and communication integrated transmission system according to an embodiment of the present invention;
fig. 6 is a sixth schematic structural diagram of a power supply and communication integrated transmission system according to an embodiment of the present invention;
fig. 7 is a seventh schematic structural diagram of a power supply and communication integrated transmission system according to an embodiment of the present invention;
fig. 8 is an eighth schematic structural diagram of a power supply and communication integrated transmission system according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a power supply and communication integrated transmission system in an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a power and communication integrated transmission system according to an embodiment of the present invention;
fig. 11 is an eleventh schematic structural diagram of a power supply and communication integrated transmission system according to an embodiment of the present invention;
fig. 12 is a twelfth schematic structural diagram of a power supply and communication integrated transmission system according to an embodiment of the present invention;
FIG. 13 is a first schematic view of a transmission cable according to an embodiment of the present invention;
FIG. 14 is a second schematic view of the transmission cable according to the embodiment of the present invention;
fig. 15 is a third schematic structural diagram of a transmission cable according to an embodiment of the present invention.
Description of the reference numerals
1-a switching circuit;
11-a supply filtering unit;
111-a power differential mode filtering module;
112-surge protection module;
113-power common mode filtering module;
12-a communication filtering unit;
121-signal common mode filtering module;
122-a signal differential mode filtering module;
13-a connector;
131-a first communication connection;
132-a second communication connection;
133-a third communication connection;
134-a fourth communication connection;
135-a first power supply connection;
136-a second power supply connection;
137-a third power connection;
138-a fourth power supply connection;
2-a transmission cable;
21-power cord core group;
22-a set of communication cores;
23-a filler;
24-power inner shielding layer;
25-a cable sheath;
26-outer shielding layer of power supply;
27-a communication outer shield;
28-a communication inner shield layer;
3, a power supply;
4-a signal source;
5-an electronic device;
c1-a first capacitor;
c2-a second capacitor;
c3-third capacitance;
c4-fourth capacitance;
r1-a first resistor;
r2-a second resistor;
d1-diode;
d2-light emitting diodes;
VDR 1-first varistor;
VDR2 — second varistor;
VDR 3-third varistor;
f1-a fuse;
GDT-gas discharge tube;
t1-a first stage power supply common mode inductor;
t2-a second stage power supply common mode inductor;
t3-first-stage communication common-mode inductor;
t4-a second-stage communication common-mode inductor;
TD 1-a first TVS unit;
TD 2-second TVS unit;
TD 3-Integrated TVS chip.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Furthermore, the term "coupled" in the description and claims of the present invention refers to electrical connections and may include direct connections or indirect connections.
Referring to fig. 1a in combination with fig. 1b, a power supply and communication integrated transmission system includes: the switching circuit 1 and the transmission cable 2;
the switching circuit 1 is respectively connected with a power supply 3 and a signal source 4, and the switching circuit 1 is also connected with one end of the transmission cable 2; the other end of the transmission cable 2 is used for connecting an electronic device 5;
the switching circuit 1 is used for: outputting power supply to the transmission cable 2 according to the alternating current provided by the power supply 3; transmitting a communication signal between the signal source 4 and the transmission cable 2, and filtering the transmitted power supply and communication signal respectively;
the transmission cable 2 is used for: the power supply is transmitted to the electronic device 5, and the communication signal is transmitted between the adapting circuit 1 and the electronic device 5.
The electronic device 5 may be any electronic device with communication and power consumption requirements, and may be, for example, an intelligent cutting head, an industrial camera, a detection device, a sports device, an industrial device, a monitoring device, or the like. Correspondingly, the signal source 4 and the power source 5 can be constructed in an upper computer and a cabinet.
In addition, the connection line between the adaptor circuit 1 and the signal source 4 may adopt a conventional RJ45 network cable, the connection line between the adaptor circuit 1 and the power supply may adopt a plurality of common copper strands, and the power supply voltage of the power supply 3 may be flexibly selected, for example, may be 24V, may also be 48V, and may also be other voltage values.
An exemplary transmission flow of power supply and communication is as follows: the user connects the power line from the power source 3 to the power interface, the power signal is imported into the transmission cable 2 through the switching circuit 1 to reach the terminal device (such as the electronic device 5), the communication signal is imported from the upper computer (i.e. the signal source 4) to reach the switching circuit 1 through the network cable, and then the communication signal is imported into the transmission cable 2 to reach the terminal device (such as the electronic device 5).
In order to facilitate the explanation of the positive effects of the embodiments of the present invention and their alternatives, several industrial cable connection schemes are further described and compared as follows:
1) The cable distributing scheme comprises the following steps:
two cable interfaces are designed on the equipment, which are a power supply interface and a communication interface respectively. When the customer uses, need to connect two cables, one is used for supplying power, and the other is used for transmitting communication signal.
Compared with a branching cable scheme, the power supply and communication integrated transmission system provided by the embodiment of the invention only needs to design and manufacture one industrial cable, thereby reducing the cost and saving the wiring space;
2) POE (Power over Ethernet) protocol:
the cable is a four-core wire, communication signal voltage is superposed on the power supply voltage, the power supply voltage is used for supplying power, the differential voltage of the communication wire is used for signal communication, and power supply and communication can be completed by one cable.
However, in the POE scheme, the power supply standard is specifically defined in ieee802.3af and ieee802.3 at: the typical value of the POE power supply voltage is 48V, and a user cannot flexibly adjust the power supply voltage value; the standard also clearly specifies that the power supply end and the equipment end must establish information connection in the aspects of connection condition, equipment type, power consumption level and the like; therefore, in the POE power supply, additional POE support modules including a voltage conversion circuit and a POE detection chip need to be designed at both ends of the cable assembly, so that compared with the POE scheme, the adopted power supply voltage is flexible and variable, corresponding modules do not need to be added at both ends of the cable, the cabinet side switching module is only composed of protection devices, and the cost is low.
In the next exemplary PWE scheme of the embodiment of the present invention, a common single shielding layer six-core transmission cable may be used, four cores are selected as communication cores, two cores are selected as power supply cores, and the power supply cores and the communication cores are integrated in one cable; both ends of the transmission cable are connected by a connector (for example, a ydode connector).
However, in the above exemplary PWE scheme, the power core and the signal core are concentrated in one cable with a single shielding layer, and interference is easily coupled into the communication core from the vicinity of the power core, which causes communication interruption or poor communication quality, and the anti-interference capability of the system is weak; and if the connector in the prior art is selected (for example, a universal Ycode connector in the world is used), the cost is high; therefore, in addition to configuring the switchover circuit as a circuit having a filtering function, the solutions exemplified hereinafter according to embodiments of the present invention are further improved with respect thereto.
In a further scheme, referring to fig. 2, the adapting circuit 1 includes a power supply filtering unit 11, a communication filtering unit 12 and a connector 13;
the transmission cable 2 comprises a power wire core group 21 and a communication wire core group 22;
the input side of the power supply filtering unit 11 is connected with the power supply 3, and the output side of the power supply filtering unit 11 is connected with one end of the power cord core group 21 through the connector 13; one side of the communication filtering unit 11 is connected to the signal source 4, and the other side of the communication filtering unit 12 is connected to one end of the communication wire core set 22 through the connector 13.
In one example, the communication core set 22 may use 19 AWG copper conductors 26, the power core set 21 may use 19 AWG copper conductors 22, and in other examples, other specifications and materials of the conductors may also be used.
Referring to fig. 3, the connector 13 includes a plurality of communication connection portions for connecting the communication core pack 22 and a plurality of power connection portions for connecting the power core pack 21;
the plurality of communication connection portions include a first communication connection portion 131, a second communication connection portion 132, a third communication connection portion 133 and a fourth communication connection portion 134;
the plurality of power connection portions include a first power connection portion 135, a second power connection portion 136, a third power connection portion 137, and a fourth power connection portion 138;
the second communication connection portion 132, the third communication connection portion 133, the fourth communication connection portion 134, the first power connection portion 135, the second power connection portion 136, the third power connection portion 137, and the fourth power connection portion 138 are sequentially distributed around the first communication connection portion;
the first communication connection portion 131 and the second communication connection portion 132 are connected to a pair of communication wire cores for transmitting a first differential signal; the third communication connection portion 133 and the fourth communication connection portion 134 are connected to a pair of communication wire cores for transmitting a second differential signal; the first power connection portion 135 and the second power connection portion 136 are grounded through the power supply filtering unit 11, and the third power connection portion 137 and the fourth power connection portion 138 are connected to a positive electrode of the output side of the power supply filtering unit 11.
In addition, in the above scheme, the Ycode terminal frequently used in PWE design is abandoned, and the integration of communication transmission and power transmission is realized through rationally arranging the connecting part position (namely the arrangement position of the communication connecting part and the power connecting part) aiming at the connector originally used for signal (such as sensor signal, communication signals of industrial buses IOlink, profibus and the like) transmission, and the EMC performance of the system is effectively improved.
The connecting parts can be respectively understood as a pin, and experimental results show that aiming at the arrangement positions (namely the pin design) of the communication connecting part and the power supply connecting part, the power line is prevented from being transmitted in the middle, so that the interference of the power supply transmission on peripheral signals can be greatly reduced.
Further, the transmission cable 2 and the electronic device 5 may be connected by a similar connector 13.
Further, referring to fig. 4, the power supply filtering unit 11 includes a power supply differential mode filtering module 111, a power supply common mode filtering module 113, and a surge protection module 112;
the surge protection module 112 and the input side of the power supply differential mode filtering module 111 are both connected with the power supply 3, the output side of the power supply differential mode filtering module 111 is connected with the input side of the power supply common mode filtering module 113, and the output side of the power supply common mode filtering module 113 is connected with the power supply line core group 21 through the connector 13.
Referring to fig. 5, the power differential mode filtering module 111 includes a first voltage dependent resistor VDR1 and a first capacitor C1, two ends of the first voltage dependent resistor VDR1 are connected between the positive electrode and the negative electrode of the power supply, and the first capacitor C1 is connected in parallel to the first voltage dependent resistor VDR1.
Further, referring to fig. 6, the power supply filtering unit 11 further includes a surge protection module 112, where the surge protection module 112 includes a second voltage dependent resistor VDR2, a third voltage dependent resistor VDR3, a fuse F1, a gas discharge tube GDT, a second capacitor C2, and a third capacitor C3;
a first end of the second voltage dependent resistor VDR2 is connected to the positive electrode of the power supply, a second end of the second voltage dependent resistor VDR2 is connected to a first end of the fuse F1, a second end of the fuse F1 is connected to a first end of the gas discharge tube GDT, and a second end of the gas discharge tube GDT is grounded;
a first end of the third voltage dependent resistor VDR3 is connected with a negative electrode of the power supply, and a second end of the third voltage dependent resistor VDR3 is connected with a first end of the fuse F1;
a first end of the second capacitor C2 is connected to a negative electrode of the power supply, and a second end of the second capacitor C2 is grounded;
the first end of the third capacitor C3 is connected to the positive electrode of the power supply, and the second end of the third capacitor C3 is grounded.
Further, referring to fig. 8 and 9, the power common mode filtering module 113 includes a first power common mode inductor T1 and a second power common mode inductor T2;
the input side of the first-stage power supply common-mode inductor T1 is connected to the output side of the power supply differential-mode filtering module 111, the input side of the second-stage power supply common-mode inductor T2 is connected to the output side of the first-stage power supply common-mode inductor T1, one end of the output side of the second-stage power supply common-mode inductor T2 is connected to the third power supply connecting part 137 and the fourth power supply connecting part 138, and the other end of the output side of the second-stage power supply common-mode inductor T2 is connected to the first power supply connecting part 135 and the second power supply connecting part 136;
in an example, referring to fig. 9, the power supply filtering unit 11 further includes a diode D1, a light emitting diode D2, a first resistor R1, and a second resistor R2;
the light emitting diode D2, the first resistor R1, and the second resistor R2 are connected in series between the positive electrode and the negative electrode of the power supply, specifically, the first end of the first resistor R1 is connected to the negative electrode of the diode D1, the second end of the first resistor R1 is connected to the first end of the second resistor R2, the second end of the second resistor R2 is connected to the positive electrode of the light emitting diode D2, and the negative electrode of the light emitting diode D2 is connected to the negative electrode of the power supply.
In an example, referring to fig. 9, the power supply filtering unit 11 further includes a fourth capacitor C4, and two ends of the fourth capacitor C4 are connected to two ends of the output side of the second stage power supply common mode inductor T2.
In one embodiment, referring to fig. 10, the communication filtering unit 12 includes a signal common mode filtering module 121 and a signal differential mode filtering module 122;
the first side of the signal common mode filtering module 121 is connected to the signal source 4, and the second side of the signal common mode filtering module 121 is connected to the communication wire core set 22 through the connector 13; a first side of the signal differential mode filtering module 122 is connected to a first side of the signal common mode filtering module 121; the second side of the signal differential mode filtering module 122 is connected to the second side of the signal common mode filtering module 121.
In a further embodiment, referring to fig. 11, the signal common mode filtering module 121 includes a first-stage communication common mode inductor T3 and a second-stage communication common mode inductor T4;
the first side of the first-stage communication common-mode inductor T3 and the first side of the second-stage communication common-mode inductor T4 are both connected with the signal source 4, and the second side of the first-stage communication common-mode inductor T3 and the second side of the second-stage communication common-mode inductor T4 are respectively connected with the communication wire core group 22 through the connector 13.
In a specific embodiment, a first pin of the first-stage communication common-mode inductor T3 and a second pin of the first-stage communication common-mode inductor are respectively connected to a first pin of the signal source 4 and a second pin of the signal source 4, and a first pin of the second-stage communication common-mode inductor T4 and a second pin of the second-stage communication common-mode inductor T4 are respectively connected to a third pin of the signal source 4 and a fourth pin of the signal source 4; the third pin of the first-stage communication common-mode inductor T3 and the fourth pin of the first-stage communication common-mode inductor are respectively connected to the fourth communication connection portion 134 and the third communication connection portion 133 of the connector 13, and the third pin of the second-stage communication common-mode inductor T4 and the fourth pin of the second-stage communication common-mode inductor T4 are respectively connected to the second communication connection portion 132 and the first communication connection portion 131 of the connector 13.
Referring to fig. 11, the signal differential mode filtering module 122 includes a first TVS unit TD1, a second TVS unit TD2 and an integrated TVS chip TD3; the first TVS unit and the second TVS unit are both bidirectional conductive TVS units;
two ends of the first TVS unit TD1 are connected to two ends of a first side of the second-stage communication common-mode inductor T4, respectively; two ends of the second TVS unit TD2 are respectively connected to two ends of the first side of the first-stage communication common-mode inductor T3;
and four ends of the integrated TVS chip TD3 are respectively connected with two ends of the second-stage communication common-mode inductor T4 and two ends of the second side of the first-stage communication common-mode inductor T3.
In a specific embodiment, a first pin of the first TVS unit TD1 and a second pin of the first TVS unit TD1 are respectively connected to a first pin of the second-level communication common-mode inductor T4 and a second pin of the second-level communication common-mode inductor T4, a first pin of the second TVS unit TD2 and a second pin of the second TVS unit are respectively connected to a first pin of the first-level communication common-mode inductor T3 and a second pin of the first-level communication common-mode inductor T3, and four pins of the integrated TVS chip TD3 are respectively connected to a third pin of the first-level communication common-mode inductor T3, a fourth pin of the first-level communication common-mode inductor T3, a third pin of the second-level communication common-mode inductor T4 and a fourth pin of the second-level communication common-mode inductor T4.
In an example, the first TVS unit TD1 and the second TVS unit TD2 may be TVS chips, or may be other electronic devices.
Therefore, the power supply line function and the communication transmission function can be integrated into one cable through the adapter circuit 1, the adapter circuit 1 filters signals through the power supply differential mode filtering module 111, the power supply common mode filtering module 113, the communication common mode filtering module 121 and the communication differential mode filtering module 122, the system has strong filtering capacity, and meanwhile, the transmission cable 2 matched with the adapter circuit 1 is provided, so that the anti-interference capacity of the system is enhanced while single-line power supply and communication transmission are achieved, meanwhile, the power supply voltage of the embodiment of the invention is not limited, and a foundation is provided for flexibly configuring and adjusting power supply parameters.
Referring to fig. 12, the transmission cable 2 further includes a communication inner shielding layer 28, a communication outer shielding layer 27, a filler 23, a power inner shielding layer 24, a power outer shielding layer 26 and a cable sheath 25;
the communication wire core group 22 is wrapped inside the communication inner shielding layer 28, and the communication outer shielding layer 27 covers the outer side of the communication inner shielding layer 28; the power cord core group 21 is in the communication outer shielding layer 27 with between the power internal shielding layer 24, filler 23 fill in the communication outer shielding layer 27 with between the power internal shielding layer 24, power outer shielding layer 26 cover in the outside of power internal shielding layer 24, cable sheath 25 cover in the outside of power outer shielding layer 26.
The communication inner shield layer 28 and the power inner shield layer 24 may be made of aluminum foil or other materials, and the cable sheath 25 may be made of PUR (polyurethane) or other materials; the communication outer shield 27 and the power outer shield 24 may be woven metal mesh.
In one example, the number of the power cores in the power core group 21 is 4, and the number of the communication cores in the communication core group 22 is 4, and in other examples, the number of the power cores and the number of the communication cores may be other numbers.
In a specific embodiment, the transmission cable 2 is connected to the connector 13 through a screw, please refer to fig. 13, a fixing position of the first communication connection portion 131 is higher than fixing positions of other screws, so as to further ensure the quality of the transmission signal, and therefore, in the cable connection process, the length of the communication wire core corresponding to the first communication connection portion 131 is cut short, so as to ensure the equal length of the differential signal, and maximize the signal transmission quality; in the cable shielding process, please refer to fig. 14, the transmission cable 2 may be wrapped inside the metal shell, and in the specific implementation process, the power source outer shielding layer 26 (e.g., metal mesh grid) and the communication outer shielding layer 27 (e.g., metal mesh grid) may be stripped and connected to the metal shell, so as to avoid the risk of short circuit between the power source outer shielding layer 26, the communication outer shielding layer 27 and the power line core set 21 and/or the communication wire core set 22, and ensure the shielding effect of the transmission cable.
Therefore, the power line core group 21 and the communication line core group 22 can be reasonably distributed, so that interference of a power line on communication signals in a transmission process is reduced, the anti-electromagnetic interference capability of the system is further enhanced, and further, the cross section area of the power line is larger and the current-carrying capacity is higher because the transmission cable 2 is an eight-core cable.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A power supply and communication integrated transmission system is characterized by comprising a switching circuit and a transmission cable;
the switching circuit is respectively connected with a power supply and a signal source and is also connected with one end of the transmission cable; the other end of the transmission cable is used for connecting electronic equipment;
the switching circuit is used for: outputting power supply to the transmission cable according to the alternating current provided by the power supply; transmitting a communication signal between the signal source and the transmission cable, and filtering the transmitted power supply and communication signal respectively;
the transmission cable is used for: transmitting the power supply to the electronic equipment and transmitting the communication signal between the switching circuit and the electronic equipment;
the switching circuit comprises a power supply filtering unit, a communication filtering unit and a connector;
the transmission cable comprises a power core group and a communication core group;
the input side of the power supply filtering unit is connected with the power supply, and the output side of the power supply filtering unit is connected with one end of the power cord core group through the connector; one side of the communication filtering unit is connected with the signal source, and the other side of the communication filtering unit is connected with one end of the communication wire core group through the connector;
the connector comprises a plurality of communication connecting parts for connecting the communication wire core groups and a plurality of power supply connecting parts for connecting the power wire core groups;
the plurality of communication connection parts comprise a first communication connection part, a second communication connection part, a third communication connection part and a fourth communication connection part;
the plurality of power connection portions include a first power connection portion, a second power connection portion, a third power connection portion, and a fourth power connection portion;
the second communication connection part, the third communication connection part, the fourth communication connection part, the first power supply connection part, the second power supply connection part, the third power supply connection part and the fourth power supply connection part are distributed in sequence around the first communication connection part;
the first communication connecting part and the second communication connecting part are connected with a pair of communication wire cores for transmitting a first differential signal; the third communication connecting part and the fourth communication connecting part are connected with a pair of communication wire cores for transmitting a second differential signal; the first power supply connecting part and the second power supply connecting part are grounded through the power supply filtering unit, and the third power supply connecting part and the fourth power supply connecting part are connected with the anode of the output side of the power supply filtering unit.
2. The power and communication integrated transmission system according to claim 1, wherein the power supply filtering unit comprises a power supply differential mode filtering module and a power supply common mode filtering module;
the input side of the power supply differential mode filtering module is connected with the power supply, the output side of the power supply differential mode filtering module is connected with the input side of the power supply common mode filtering module, and the output side of the power supply common mode filtering module is connected with the power line core group through the connector.
3. The integrated power and communication transmission system according to claim 2, wherein the power differential mode filtering module comprises a first voltage dependent resistor and a first capacitor;
two ends of the first piezoresistor are connected between the anode and the cathode of the power supply;
the first capacitor is connected in parallel with the first piezoresistor.
4. The power and communication integrated transmission system according to claim 2, wherein the power supply filtering unit further comprises a surge protection module, and the surge protection module comprises a second voltage dependent resistor, a third voltage dependent resistor, a fuse, a gas discharge tube, a second capacitor and a third capacitor;
the first end of the second piezoresistor is connected with the positive electrode of the power supply, the second end of the second piezoresistor is connected with the first end of the fuse, the second end of the fuse is connected with the first end of the gas discharge tube, and the second end of the gas discharge tube is grounded;
the first end of the third piezoresistor is connected with the negative electrode of the power supply, and the second end of the third piezoresistor is connected with the first end of the fuse;
the first end of the second capacitor is connected with the negative electrode of the power supply, and the second end of the second capacitor is grounded;
and the first end of the third capacitor is connected with the anode of the power supply, and the second end of the third capacitor is grounded.
5. The integrated power and communication transmission system of claim 2, wherein the power common mode filter module comprises a first stage power common mode inductor and a second stage power common mode inductor;
the input side of the first-stage power supply common-mode inductor is connected to the output side of the power supply differential-mode filtering module, the input side of the second-stage power supply common-mode inductor is connected to the output side of the first-stage power supply common-mode inductor, and the output side of the second-stage power supply common-mode inductor is connected to the power supply core group through the connector.
6. The integrated power and communication transmission system according to any one of claims 1 to 5, wherein the communication filtering unit comprises a signal common mode filtering module and a signal differential mode filtering module;
the first side of the signal common mode filtering module is connected with the signal source, and the second side of the signal common mode filtering module is connected with the communication wire core group through the connector; the first side of the signal differential mode filtering module is connected with the first side of the signal common mode filtering module; and the second side of the signal differential mode filtering module is connected with the second side of the signal common mode filtering module.
7. The integrated power and communication transmission system according to claim 6, wherein the signal common mode filter module comprises a first stage communication common mode inductor and a second stage communication common mode inductor;
the first side of the first-level communication common-mode inductor and the first side of the second-level communication common-mode inductor are both connected with the signal source, and the second side of the first-level communication common-mode inductor and the second side of the second-level communication common-mode inductor are respectively connected with the communication wire core group through the connector.
8. The integrated power and communication transmission system of claim 7, wherein the signal differential mode filtering module comprises a first TVS unit, a second TVS unit and an integrated TVS chip; the first TVS unit and the second TVS unit are both bidirectional conductive TVS units;
two ends of the first TVS unit are respectively connected with two ends of a first side of the second-stage communication common-mode inductor; two ends of the second TVS unit are respectively connected with two ends of a first side of the first-stage communication common-mode inductor;
and four ends of the integrated TVS chip are respectively connected with two ends of the second side of the second-stage communication common-mode inductor and two ends of the second side of the first-stage communication common-mode inductor.
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| CN202110110199.3A CN112953730B (en) | 2021-01-26 | 2021-01-26 | Power supply and communication integrated transmission system |
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| CN202110110199.3A CN112953730B (en) | 2021-01-26 | 2021-01-26 | Power supply and communication integrated transmission system |
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| CN112953730A (en) | 2021-06-11 |
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