CN220440712U - Three-phase coupling circuit of power line carrier - Google Patents
Three-phase coupling circuit of power line carrier Download PDFInfo
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- CN220440712U CN220440712U CN202322267786.0U CN202322267786U CN220440712U CN 220440712 U CN220440712 U CN 220440712U CN 202322267786 U CN202322267786 U CN 202322267786U CN 220440712 U CN220440712 U CN 220440712U
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- 230000008878 coupling Effects 0.000 title claims abstract description 159
- 238000010168 coupling process Methods 0.000 title claims abstract description 159
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 159
- 238000004891 communication Methods 0.000 claims abstract description 45
- 238000005191 phase separation Methods 0.000 claims abstract description 34
- 239000003990 capacitor Substances 0.000 claims description 24
- 230000005611 electricity Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 7
- 239000000969 carrier Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The application provides a power line carrier three-phase coupling circuit. The power line carrier three-phase coupling circuit comprises a three-phase split-phase circuit and a three-phase coupling circuit; the three-phase separation circuit comprises a first phase separation processor, a second phase separation processor, a third phase separation processor and a voltage reduction circuit; the three-phase coupling circuit comprises a constant voltage circuit and a coupling circuit, wherein a first end of a secondary side of a first coupling transformer is connected with a first phase-splitting live wire of a mains supply, a first end of a secondary side of a second coupling transformer is connected with a second phase-splitting live wire of the mains supply, and a first end of a secondary side of a third coupling transformer is connected with a third phase-splitting live wire of the mains supply. The communication signals are converted into three independent power line carrier signals through the three split-phase processors, the carrier signals are loaded onto the power lines through the coupling transformers, the electronic communication equipment can realize power line carrier communication through any phase of electricity, the three-phase power line carrier communication device is suitable for three-phase power line carrier communication, and the capacity of accommodating the communication equipment is effectively improved.
Description
Technical Field
The utility model relates to the technical field of power line carriers, in particular to a power line carrier three-phase coupling circuit.
Background
Communication technologies that have been used in low voltage distribution networks include fiber optic communication, power line carrier communication (broadband and narrowband), RS485/232, and micropower wireless communication, among others. Because the power line omits a communication professional cable, the existing power distribution network is directly utilized as an energy, information and control integrated network platform, and the same network transmission of power and information is truly realized. There are many advantages to other communication technologies, but communication reliability is the most significant cause of limited and questioned current applications. The complexity of the power line communication channel environment and the sharing, openness and diversity of the communication medium environment are essential causes of poor reliability of the power line communication system. For power line communication, only improving the communication high reliability of point-to-point between nodes does not mean that the communication high reliability of the whole network can be improved, which is merely the basis and premise of the network reliability.
However, most of the power carrier gateways in the market at present are mainly single-phase power, and the number of the accommodating devices is limited, so that the power carrier gateway is only suitable for small engineering projects, such as houses and apartments, and cannot be suitable for engineering projects such as large hotels and shops.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provides a power line carrier three-phase coupling circuit suitable for three-phase power line carrier communication.
The aim of the utility model is realized by the following technical scheme:
a power line carrier three-phase coupling circuit, comprising: a three-phase split-phase circuit and a three-phase coupling circuit; the three-phase separation circuit comprises a first phase separation processor, a second phase separation processor, a third phase separation processor and a voltage reduction circuit, wherein the input ends of the first phase separation processor, the second phase separation processor and the third phase separation processor are used for receiving communication signals, and the output end of the voltage reduction circuit is respectively connected with the power supply ends of the first phase separation processor, the second phase separation processor and the third phase separation processor; the three-phase coupling circuit comprises a constant voltage circuit and a coupling circuit, wherein the input end of the constant voltage circuit is connected with a mains supply zero line, the output end of the constant voltage circuit is connected with the input end of the step-down circuit, the coupling circuit comprises a first coupling transformer, a second coupling transformer and a third coupling transformer, the primary side of the first coupling transformer is connected with the output end of the first split-phase processor, the first end of the secondary side of the first coupling transformer is connected with a mains supply first split-phase live line, the second end of the secondary side of the first coupling transformer is connected with the mains supply zero line, the primary side of the second coupling transformer is connected with the output end of the second split-phase processor, the first end of the secondary side of the second coupling transformer is connected with the mains supply zero line, the primary side of the third coupling transformer is connected with the output end of the third split-phase processor, the secondary side of the third coupling transformer is connected with the third split-phase transformer, and the third end of the third coupling transformer is connected with the mains supply zero line.
In one embodiment, the coupling circuit further includes a first capacitor, and the second end of the secondary side of the first coupling transformer is connected to a mains zero line through the first capacitor.
In one embodiment, the coupling circuit further comprises a second capacitor, and the second end of the secondary side of the second coupling transformer is connected with a mains zero line through the second capacitor.
In one embodiment, the coupling circuit further includes a third capacitor, and the second end of the secondary side of the third coupling transformer is connected to the mains zero line through the third capacitor.
In one embodiment, the coupling circuit further comprises a first varistor, and the first end of the secondary side of the first coupling transformer is connected to a mains zero line through the first varistor.
In one embodiment, the coupling circuit further comprises a second varistor, and the first end of the secondary side of the second coupling transformer is connected to the mains zero line through the second varistor.
In one embodiment, the coupling circuit further comprises a third varistor, and the first end of the secondary side of the third coupling transformer is connected to the mains zero line through the third varistor.
In one embodiment, the coupling circuit further comprises a first split-phase fuse, a first end of the first split-phase fuse is connected with a first split-phase live wire of the mains supply, and a second end of the first split-phase fuse is connected with a first end of a secondary side of the first coupling transformer.
In one embodiment, the coupling circuit further comprises a second phase-splitting fuse, a first end of the second phase-splitting fuse is connected with a mains supply second phase-splitting line, and a second end of the second phase-splitting fuse is connected with a first end of a secondary side of the second coupling transformer.
In one embodiment, the coupling circuit further comprises a third split-phase fuse, a first end of the third split-phase fuse is connected with a third split-phase live wire of the mains supply, and a second end of the third split-phase fuse is connected with a first end of a secondary side of the third coupling transformer.
Compared with the prior art, the utility model has at least the following advantages:
the communication signals are converted into three independent power line carrier signals through the three split-phase processors, the carrier signals are loaded onto the power lines through the coupling transformers respectively, communication of three-phase power line carriers is achieved, the electronic communication equipment can achieve power line carrier communication through any phase of electricity, the communication equipment is suitable for three-phase power line carrier communication, and the capacity of containing communication equipment is effectively improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a circuit diagram of a three-phase coupling circuit of a power line carrier according to an embodiment;
FIG. 2 is a circuit diagram of a three-phase split-phase circuit in the power line carrier three-phase coupling circuit shown in FIG. 1;
fig. 3 is a circuit diagram of a three-phase coupling circuit of the power line carrier three-phase coupling circuit shown in fig. 1.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The utility model relates to a power line carrier three-phase coupling circuit. In one embodiment, the power line carrier three-phase coupling circuit comprises a three-phase split-phase circuit and a three-phase coupling circuit; the three-phase separation circuit comprises a first phase separation processor, a second phase separation processor, a third phase separation processor and a voltage reduction circuit, wherein the input ends of the first phase separation processor, the second phase separation processor and the third phase separation processor are used for receiving communication signals, and the output end of the voltage reduction circuit is respectively connected with the power supply ends of the first phase separation processor, the second phase separation processor and the third phase separation processor; the three-phase coupling circuit comprises a constant voltage circuit and a coupling circuit, wherein the input end of the constant voltage circuit is connected with a mains supply zero line, the output end of the constant voltage circuit is connected with the input end of the step-down circuit, the coupling circuit comprises a first coupling transformer, a second coupling transformer and a third coupling transformer, the primary side of the first coupling transformer is connected with the output end of the first split-phase processor, the first end of the secondary side of the first coupling transformer is connected with a mains supply first split-phase live line, the second end of the secondary side of the first coupling transformer is connected with the mains supply zero line, the primary side of the second coupling transformer is connected with the output end of the second split-phase processor, the first end of the secondary side of the second coupling transformer is connected with the mains supply zero line, the primary side of the third coupling transformer is connected with the output end of the third split-phase processor, the secondary side of the third coupling transformer is connected with the third split-phase transformer, and the third end of the third coupling transformer is connected with the mains supply zero line. The communication signals are converted into three independent power line carrier signals through the three split-phase processors, the carrier signals are loaded onto the power lines through the coupling transformers respectively, communication of three-phase power line carriers is achieved, the electronic communication equipment can achieve power line carrier communication through any phase of electricity, the communication equipment is suitable for three-phase power line carrier communication, and the capacity of containing communication equipment is effectively improved.
Please refer to fig. 1, which is a circuit diagram of a power line carrier three-phase coupling circuit according to an embodiment of the present utility model.
The power line carrier three-phase coupling circuit 10 of an embodiment includes a three-phase split-phase circuit 100 and a three-phase coupling circuit 200. Referring to fig. 2, the three-phase split-phase circuit 100 includes a first split-phase processor U1, a second split-phase processor U2, a third split-phase processor U3, and a voltage-reducing circuit 110. The input ends of the first split-phase processor U1, the second split-phase processor U2 and the third split-phase processor U3 are used for receiving communication signals, and the output end of the step-down circuit 110 is respectively connected with the power supply ends of the first split-phase processor U1, the second split-phase processor U2 and the third split-phase processor U3. Referring to fig. 3, the three-phase coupling circuit 200 includes a constant voltage circuit 210 and a coupling circuit 220, wherein an input end of the constant voltage circuit 210 is connected to a mains voltage zero line, and an output end of the constant voltage circuit 210 is connected to an input end of the step-down circuit 110. The coupling circuit 220 includes a first coupling transformer T2, a second coupling transformer T3, and a third coupling transformer T4. The primary side of the first coupling transformer T2 is connected with the output end of the first split-phase processor U1, the first end of the secondary side of the first coupling transformer T2 is connected with a first split-phase live wire of the mains supply, and the second end of the secondary side of the first coupling transformer T2 is connected with a zero line N of the mains supply. The primary side of the second coupling transformer T3 is connected with the output end of the second phase splitting processor U2, the first end of the secondary side of the second coupling transformer T3 is connected with a mains supply second phase splitting live wire, and the second end of the secondary side of the second coupling transformer T3 is connected with a mains supply zero line N. The primary side of the third coupling transformer T4 is connected with the output end of the third split-phase processor U3, the first end of the secondary side of the third coupling transformer T4 is connected with a third split-phase live wire of the mains supply, and the second end of the secondary side of the third coupling transformer T4 is connected with a zero line N of the mains supply.
In this embodiment, the communication signal is converted into three independent power line carrier signals through the three split-phase processors, the carrier signals are loaded onto the power lines through the coupling transformers respectively, communication of three-phase power line carriers is achieved, the electronic communication equipment can achieve power line carrier communication through any one phase of electricity, the communication equipment is suitable for three-phase power line carrier communication, and the capacity of accommodating the communication equipment is effectively improved.
The first end of the secondary side of the first coupling transformer T2, the first end of the secondary side of the second coupling transformer T3, and the first end of the secondary side of the third coupling transformer T4 are the same name ends of the secondary side of the transformer, and the second end of the secondary side is the different name end of the secondary side of the transformer.
In one embodiment, referring to fig. 3, the coupling circuit 220 further includes a first capacitor CX1, and the second end of the secondary side of the first coupling transformer T2 is connected to the mains zero line N through the first capacitor CX 1. In this embodiment, the first capacitor CX1 is connected to the first coupling transformer T2, specifically, the first capacitor CX1 is connected in series to the synonym terminal on the secondary side of the first coupling transformer T2, and the first capacitor CX1 filters the single-phase power line carrier signal on the first split-phase fire line of the utility power to ensure the stability of loading the first-phase carrier signal on the power line in the three-phase power grid.
In one embodiment, referring to fig. 3, the coupling circuit 220 further includes a second capacitor CX2, and the second end of the secondary side of the second coupling transformer T3 is connected to the mains zero line N through the second capacitor CX 2. In this embodiment, the second capacitor CX2 is connected to the second coupling transformer T3, specifically, the second capacitor CX2 is connected in series to the synonym terminal on the secondary side of the second coupling transformer T3, and the second capacitor CX2 filters the single-phase power line carrier signal on the second phase-division line of the utility power to ensure the stability of loading the second phase-carrier signal on the power line in the three-phase power network.
In one embodiment, referring to fig. 3, the coupling circuit 220 further includes a third capacitor CX3, and the second end of the secondary side of the third coupling transformer T4 is connected to the mains zero line N through the third capacitor CX 3. In this embodiment, the third capacitor CX3 is connected to the second coupling transformer T3, specifically, the third capacitor CX3 is connected in series to the synonym terminal on the secondary side of the third coupling transformer T4, and the third capacitor CX3 filters the single-phase power line carrier signal on the third phase-splitting fire line of the utility power to ensure the stability of loading the third phase carrier signal on the power line in the three-phase power grid.
In one embodiment, referring to fig. 3, the coupling circuit 220 further includes a first varistor RV1, and a first end of the secondary side of the first coupling transformer T2 is connected to the mains zero line N through the first varistor RV 1. In this embodiment, the first varistor RV1 is connected to the first coupling transformer T2, specifically, the first varistor RV1 is on the same-name end of the secondary side of the first coupling transformer T2, that is, the first varistor RV1 is connected in parallel between the first phase-splitting line and the zero line of the utility power. The first piezoresistor RV1 is a resistor with an adjustable resistance, and the current of the single-phase power line carrier signal on the first phase-splitting fire wire of the commercial power is adjusted by changing the resistance of the first piezoresistor RV1, so that the condition that the current of the first phase carrier signal in the three-phase power grid loaded on the power wire is overlarge is avoided, the anti-surge effect is achieved, and the transmission stability of the three-phase carrier signal is ensured.
In one embodiment, referring to fig. 3, the coupling circuit 220 further includes a second varistor RV2, and the first end of the secondary side of the second coupling transformer T3 is connected to the mains zero line N through the second varistor RV 2. In this embodiment, the second varistor RV2 is connected to the second coupling transformer T3, specifically, the second varistor RV2 is on the same-name end of the secondary side of the second coupling transformer T3, that is, the second varistor RV2 is connected in parallel between the second phase-division line and the neutral line of the utility power. The second piezoresistor RV2 is a resistor with an adjustable resistance, and the current of the single-phase power line carrier signal on the mains supply second phase-splitting fire wire is adjusted by changing the resistance of the second piezoresistor RV2, so that the condition that the current of the second phase carrier signal loaded on the power wire in the three-phase power grid is overlarge is avoided, the anti-surge effect is achieved, and the transmission stability of the three-phase carrier signal is ensured.
In one embodiment, referring to fig. 3, the coupling circuit 220 further includes a third varistor RV3, and the first end of the secondary side of the third coupling transformer T4 is connected to the mains zero line N through the third varistor RV 3. In this embodiment, the third varistor RV3 is connected to the third coupling transformer T4, specifically, the third varistor RV3 is on the same-name end of the secondary side of the third coupling transformer T4, that is, the third varistor RV3 is connected in parallel between the third phase-splitting line and the neutral line of the utility power. The third piezoresistor RV3 is a resistor with an adjustable resistance, and the current of the single-phase power line carrier signal on the third phase-splitting fire wire of the commercial power is adjusted by changing the resistance of the third piezoresistor RV3, so that the condition that the current of the third phase carrier signal in the three-phase power grid loaded on the power wire is overlarge is avoided, the anti-surge effect is achieved, and the transmission stability of the three-phase carrier signal is ensured.
In one embodiment, referring to fig. 3, the coupling circuit 220 further includes a first split-phase fuse F1, a first end of the first split-phase fuse F1 is connected to a first split-phase live line of the mains supply, and a second end of the first split-phase fuse F1 is connected to a first end of the secondary side of the first coupling transformer T2. In this embodiment, the first split-phase fuse F1 is connected to the first coupling transformer T2, specifically, the first split-phase fuse F1 is connected in series to the first split-phase fire line of the mains supply, and the first split-phase fuse F1 performs fusing protection on the current on the first split-phase fire line of the mains supply, so as to fuse when the current on the first split-phase fire line of the mains supply is too large, thereby effectively ensuring the transmission security of three-phase carrier signals.
In one embodiment, referring to fig. 3, the coupling circuit 220 further includes a second phase-splitting fuse F2, a first end of the second phase-splitting fuse F2 is connected to a second phase-splitting line of the mains, and a second end of the second phase-splitting fuse F2 is connected to a first end of the secondary side of the second coupling transformer T3. In this embodiment, the second phase-splitting fuse F2 is connected to the second coupling transformer T3, specifically, the second phase-splitting fuse F2 is connected in series to the mains supply second phase-splitting fire wire, and the second phase-splitting fuse F2 performs fusing protection on the current on the mains supply second phase-splitting fire wire, so as to fuse when the current on the mains supply second phase-splitting fire wire is too large, thereby effectively ensuring the transmission security of the three-phase carrier signal.
In one embodiment, referring to fig. 3, the coupling circuit 220 further includes a third split-phase fuse F3, a first end of the third split-phase fuse F3 is connected to a third split-phase live line of the mains supply, and a second end of the third split-phase fuse F3 is connected to a first end of the secondary side of the third coupling transformer T4. In this embodiment, the third split-phase fuse F3 is connected to the third coupling transformer T4, specifically, the third split-phase fuse F3 is connected in series to the third split-phase line of the mains supply, and the third split-phase fuse F3 performs fusing protection on the current on the third split-phase line of the mains supply, so as to fuse when the current on the third split-phase line of the mains supply is too large, thereby effectively ensuring the transmission safety of the three-phase carrier signal.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. A power line carrier three-phase coupling circuit, comprising:
the three-phase separation circuit comprises a first phase separation processor, a second phase separation processor, a third phase separation processor and a voltage reduction circuit, wherein the input ends of the first phase separation processor, the second phase separation processor and the third phase separation processor are used for receiving communication signals, and the output end of the voltage reduction circuit is respectively connected with the power supply ends of the first phase separation processor, the second phase separation processor and the third phase separation processor;
the three-phase coupling circuit comprises a constant voltage circuit and a coupling circuit, wherein the input end of the constant voltage circuit is connected with a mains supply zero line, the output end of the constant voltage circuit is connected with the input end of the step-down circuit, the coupling circuit comprises a first coupling transformer, a second coupling transformer and a third coupling transformer, the primary side of the first coupling transformer is connected with the output end of the first split-phase processor, the first end of the secondary side of the first coupling transformer is connected with a mains supply first split-phase line, the second end of the secondary side of the first coupling transformer is connected with the mains supply zero line, the primary side of the second coupling transformer is connected with the output end of the second split-phase processor, the first end of the secondary side of the second coupling transformer is connected with a mains supply second split-phase line, the primary side of the third coupling transformer is connected with the output end of the third split-phase processor, the secondary side of the second coupling transformer is connected with the third split-phase line of the third coupling transformer, and the third end of the third coupling transformer is connected with the mains supply zero line.
2. The power line carrier three-phase coupling circuit of claim 1, further comprising a first capacitor through which the second end of the secondary side of the first coupling transformer is connected to a mains zero line.
3. The power line carrier three-phase coupling circuit according to claim 1, further comprising a second capacitor through which a second end of the secondary side of the second coupling transformer is connected to a mains zero line.
4. The power line carrier three-phase coupling circuit according to claim 1, further comprising a third capacitor through which the second end of the secondary side of the third coupling transformer is connected to a mains zero line.
5. The power line carrier three-phase coupling circuit according to claim 1, further comprising a first varistor, wherein a first end of the secondary side of the first coupling transformer is connected to a mains zero line via the first varistor.
6. The power line carrier three-phase coupling circuit according to claim 1, further comprising a second varistor, the first end of the secondary side of the second coupling transformer being connected to a mains zero line via the second varistor.
7. The power line carrier three-phase coupling circuit according to claim 1, further comprising a third varistor, wherein the first end of the secondary side of the third coupling transformer is connected to a mains zero line via the third varistor.
8. The power line carrier three-phase coupling circuit of claim 1, further comprising a first split-phase fuse, a first end of the first split-phase fuse being connected to a mains first split-phase hot, a second end of the first split-phase fuse being connected to a first end of a secondary side of the first coupling transformer.
9. The power line carrier three-phase coupling circuit of claim 1, further comprising a second phase-splitting fuse, a first end of the second phase-splitting fuse being connected to a mains second phase-splitting hot, a second end of the second phase-splitting fuse being connected to a first end of a secondary side of the second coupling transformer.
10. The power line carrier three-phase coupling circuit of claim 1, further comprising a third split-phase fuse, a first end of the third split-phase fuse connected to a mains third split-phase hot, and a second end of the third split-phase fuse connected to a first end of a secondary side of the third coupling transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322267786.0U CN220440712U (en) | 2023-08-22 | 2023-08-22 | Three-phase coupling circuit of power line carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322267786.0U CN220440712U (en) | 2023-08-22 | 2023-08-22 | Three-phase coupling circuit of power line carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220440712U true CN220440712U (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322267786.0U Active CN220440712U (en) | 2023-08-22 | 2023-08-22 | Three-phase coupling circuit of power line carrier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220440712U (en) |
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2023
- 2023-08-22 CN CN202322267786.0U patent/CN220440712U/en active Active
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