CN203368469U - Coupling separation circuit of power line communication high-speed modulation signal and DC power supply - Google Patents
Coupling separation circuit of power line communication high-speed modulation signal and DC power supply Download PDFInfo
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- CN203368469U CN203368469U CN 201320403608 CN201320403608U CN203368469U CN 203368469 U CN203368469 U CN 203368469U CN 201320403608 CN201320403608 CN 201320403608 CN 201320403608 U CN201320403608 U CN 201320403608U CN 203368469 U CN203368469 U CN 203368469U
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- power supply
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- modulation signal
- speed modulation
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Abstract
The utility model discloses a coupling separation circuit of a power line communication high-speed modulation signal and a DC power supply. The circuit comprises a first coupling capacitor, a first coupling inductor, a high-frequency signal transformer, a second coupling capacitor, a second coupling inductor and a power adaptor, wherein the first coupling capacitor is electrically connected with the power adaptor successively through the high-frequency signal transformer and the second coupling capacitor, and the first coupling inductor is electrically connected with the power adaptor through the second coupling inductor. According to the utility model, the high-speed modulation signal and the DC power supply, after coupled and separated, can be directly connected in the power adaptor, and the signal finally generated in the power adaptor comprises both the high-speed modulation signal and also a DC power supply signal, so that a power communication signal can be directly coupled to the output end of the power adaptor, the high-speed modulation signal and the output end of the DC power supply can be combined into one body, and the wiring is simplified.
Description
Technical field
The utility model relates to the communications field, relates in particular to the integrated separation circuit of a kind of power line communication High Speed Modulation signal and DC power supply.
Background technology
At present, most communication equipments are powered by external power adapter, so these communication equipments can be considered weak current equipment.When communication equipment need to be introduced power line communications interface, two kinds of practices are arranged traditionally: 1) refer to Fig. 5, commercial power interface is sent in communication equipment, complete the coupling of High Speed Modulation signal and civil power-separate in equipment; 2) refer to Fig. 6, by the plc communication module integration, in the externally fed adapter, in AC-DC Switching Power Supply, the externally fed adapter is connected with communication equipment by Ethernet interface again, completes the conversion of Ethernet to power line communication.Above-mentioned the first practice is that weak current equipment is become to heavy current installation, therefore need to complete the authentication expended consuming time; The second practice is that complicated communication module has been integrated into simply, cheaply in power supply adaptor, and wiring has been become to more complicated.
The demand that the electric connection mode that existing communication equipment is introduced power line communications interface all can't satisfying the market is to sum up described.
The utility model content
For the weak point existed in above-mentioned technology, the utility model provides the integrated separation circuit of a kind of power line communication High Speed Modulation signal and DC power supply, the integrated separation pattern of this circuit can realize that the output of power line High Speed Modulation signal and DC power supply unites two into one, and has simplified wiring.
For achieving the above object, the utility model provides the integrated separation circuit of a kind of power line communication High Speed Modulation signal and DC power supply, comprises for by High Speed Modulation signal isolated the first coupling capacitance, the first coupling inductance, high-frequency signal transformer, the second coupling capacitance, the second coupling inductance and power supply adaptor for isolate DC power supply from commercial power interface commercial power interface; Described the first coupling capacitance is successively by being electrically connected to power supply adaptor after high-frequency signal transformer and the second coupling capacitance, and described the first coupling inductance is electrically connected to power supply adaptor by the second coupling inductance.
Wherein, described circuit also comprises for isolating the common mode noise rejection device of common-mode noise, and described high-frequency signal transformer is electrically connected to the second coupling capacitance by the common mode noise rejection device.
Wherein, described common mode noise rejection device is common mode inductance or reversible balance-to-nonbalance converter.
Wherein, described power supply adaptor is AC-DC adapter or DC-DC adapter.
Wherein, the transformation ratio of described high-frequency signal transformer 1: 1 or 1: n, wherein n is greater than zero number.
The beneficial effects of the utility model are: compared with prior art, the power line communication High Speed Modulation signal that the utility model provides and the integrated separation circuit of DC power supply, by the first coupling capacitance, the High Speed Modulation signal is isolated from commercial power interface, again this signal is isolated the unsafe civil power of human body by high-frequency signal transformer handle, signal access power supply adaptor after finally isolating, the first coupling inductance is electrically connected to power supply adaptor by DC power supply by the second coupling inductance, above-mentioned signal can directly be connected after integrated separation with direct current in power supply adaptor, the final signal produced in power supply adaptor had both comprised the High Speed Modulation signal, also comprised DC power signal, realized the electric-power wire communication signal direct-coupling on the output of power supply adaptor, the output of High Speed Modulation signal and DC power supply unites two into one, simplified wiring.The utlity model has reasonable in design, wiring is simple, be simple and easy to by characteristics such as, with low cost and operating efficiency are high.
The accompanying drawing explanation
Fig. 1 is working envelope figure of the present utility model;
The fundamental diagram that Fig. 2 is the utility model specific embodiment;
Fig. 3 is the inside communication equipment schematic diagram supporting with the utility model;
Fig. 4 is the schematic diagram that the utility model is connected with communication equipment;
The connection diagram that Fig. 5 is prior art the first embodiment;
Fig. 6 is prior art the second embodiment schematic diagram.
The main element symbol description is as follows:
10, the first coupling capacitance 11, the first coupling inductance
12, high-frequency signal transformer 13, the second coupling capacitance
14, the second coupling inductance 15, power supply adaptor
16, common mode noise rejection device
Embodiment
In order more clearly to explain the utility model, below in conjunction with accompanying drawing, the utility model is further described.
Refer to Fig. 1, the integrated separation circuit of power line communication High Speed Modulation signal of the present utility model and DC power supply, comprise for by High Speed Modulation signal isolated the first coupling capacitance 10, the first coupling inductance 11, high-frequency signal transformer 12, the second coupling capacitance 13, the second coupling inductance 14 and power supply adaptor 15 for isolate DC power supply from commercial power interface commercial power interface; The first coupling capacitance 10 is electrically connected to power supply adaptor 15 by being electrically connected to power supply adaptor 15, the first coupling inductances 11 after high-frequency signal transformer 12 and the second coupling capacitance 13 by the second coupling inductance 14 successively.
Situation compared to prior art, the power line communication High Speed Modulation signal that the utility model provides and the integrated separation circuit of DC power supply, by the first coupling capacitance 10, the High Speed Modulation signal is isolated from commercial power interface, again this signal is isolated the unsafe civil power of human body by 12, high-frequency signal transformer, signal access power supply adaptor 15 after finally isolating, the first coupling inductance 11 is electrically connected to power supply adaptor 15 by DC power supply by the second coupling inductance 14, above-mentioned signal and direct current can be in the interior direct connections of power supply adaptor 15 after integrated separation, the final signal produced in power supply adaptor 15 had both comprised the High Speed Modulation signal, also comprised DC power signal, realized directly the electric-power wire communication signal direct-coupling on the output of power supply adaptor 15, the output of High Speed Modulation signal and DC power supply unites two into one, simplified wiring.The utlity model has reasonable in design, wiring is simple, be simple and easy to by characteristics such as, with low cost and operating efficiency are high, this circuit is not limited to power supply adaptor 15 inputs, output voltage amplitude, is not limited to the impact of power output yet.
In the present embodiment, circuit also comprises for isolating the common mode noise rejection device 16 of common-mode noise, and high-frequency signal transformer 12 is electrically connected to the second coupling capacitance 13 by common mode noise rejection device 16.By the effect of common mode noise rejection device 16, the impact that can effectively avoid common-mode noise to bring the electric line communication system performance.Common mode noise rejection device 16 is common mode inductance or reversible balance-to-nonbalance converter.Certainly; being not limited to above-mentioned two types, can also be that other have the device of common mode inhibition capacity or circuit etc., if to the change of common mode noise rejection device 16 types; so also can be understood as simple deformation of the present utility model or conversion, fall into protection range of the present utility model.
In the present embodiment, power supply adaptor 15 is AC-DC adapter or DC-DC adapter, and this power supply adaptor 15 is for the circuit to the external circuit power supply.Certainly, be not limited to the type of power supply adaptor 15, if, to the change of power supply adaptor 15 types, so also can be understood as simple deformation of the present utility model or conversion, fall into protection range of the present utility model.
In the present embodiment, the transformation ratio 1:1 of high-frequency signal transformer 12 or 1:n, wherein n is greater than zero number.When the conversion of high-frequency signal no resistance requires, select the transformer of 1:1; Otherwise according to the impedance transformation requirement, be adjusted into the 1:n transformer, the user can select dissimilar transformer as required.
In prior art, for the High-Speed Power Line Communication signal, the general lower bound of its analog frequency band is 2MHz, high limit depends on adopted modulation technique, be generally 25MHz～100MHz, and the output of the direct current of power supply adaptor directly is connected with output capacitance, in the time of high frequency, equivalent resistance is close to 0, so electric-power wire communication signal can't be directly coupled to the power supply adaptor output.For realizing that above-mentioned High Speed Modulation signal coupling is on DC power supply, the job step that the utility model adopts is: the first step: the High Speed Modulation signal is separated from the alternating current interface by the first coupling capacitance 10, and the signal output impedance of separating is the equiva lent impedance of ac cable; Second step: will separate by the first coupling inductance 11 for the low frequency civil power of 50Hz or 60Hz, and send into the AC-DC Switching Power Supply, to produce the needed DC power supply of communication equipment; The 3rd step: by isolated power line high-frequency modulation signal in the first step by high-frequency signal transformer 12 with the unsafe civil power of human body is isolated; The 4th step: the isolation high-frequency modulation signal produced in the 3rd step is accessed to then out connector or the stube cable of power supply adaptors 15 by the second coupling capacitance 13; The 5th step: the DC power supply that the 3rd step is produced accesses power supply adaptors 15 then out connector or stube cable by the second coupling inductance 14, and realization directly is connected with the High Speed Modulation signal in power supply adaptor 15.
The signal that the power supply adaptor 15 obtained by above-mentioned steps produces had both comprised the High Speed Modulation signal, had also comprised DC power signal.For DC power supply, the DC impedance that its output impedance is power supply adaptor 15 adds the DC impedance of two upper coupling inductances; And the output impedance of High Speed Modulation signal still equals the impedance of medium-high frequency signal transformer 12 output signals.It should be noted that High Speed Modulation sense in above-mentioned steps is separation from the power line to the communication equipment-coupling-separation process, from the signal of communication to the power line, need to similarly be coupled-separate-coupling process in the reverse direction.Because foregoing circuit is linear, symmetrical, so be reversible, same circuit can complete reciprocal process.In addition, the coupling inductance in each part mentioned above is selected extremely important, and the minimum value of coupling inductance depends on the lower-frequency limit of power line modulation signal.Generally speaking, inductance must not be lower than 5 times of power line equiva lent impedance in the equiva lent impedance of frequency modulating signal lower limit, otherwise more serious loss of signal and reflection are arranged.For instance, when being 75 ohm, while under power line signal, being limited to 2MHz, the minimum value of coupling inductance is=33uH.Simultaneously, the saturation current of inductance is greater than AC power supplies input current and DC output current.
Please further consulting Fig. 2 is specific embodiment of the utility model: due to coupling inductance L1 and the higher blocking action of coupling inductance L3 high frequency equiva lent impedance, the power line high-frequency modulation signal of connector J1 can only enter high-frequency path by coupling capacitance C1 and coupling capacitance C3, and can not sponged by the AC-DC adapter.In like manner, due to coupling capacitance C1 and the higher blocking action of coupling capacitance C3 low frequency equiva lent impedance, civil power can only enter the AC-DC adapter from coupling inductance L1 and coupling inductance L3; High-frequency modulation signal enters high-frequency signal transformer 12 by coupling capacitance C1 and coupling capacitance C3, and the effect of common mode inductance T is the common-mode noise that isolation is transmitted from the civil power electric wire, avoids common-mode noise to bring impact to the electric line communication system performance; In this process, due to coupling inductance L2 and the higher blocking action of coupling inductance L4 high frequency equiva lent impedance, high-frequency modulation signal can only be sent into communication equipment by connector J2, and can not enter AC-and the DC adapter is absorbed.As a same reason, also can only enter communication equipment by connector J2 from the direct voltage of AC-DC adapter output.
Please further consult Fig. 3, connector J3 is by coupling inductance L5 and the higher blocking action of coupling inductance L6 high frequency equiva lent impedance, and high-frequency modulation signal enters the PLC input circuit and receives after processed and export from the PLC output circuit; Then, in the blocking action by coupling capacitance C5 and coupling capacitance C6, the DC power supply can be afterwards after filtering communication equipment power supply is provided.
Above-mentioned Fig. 2 and Fig. 3, describe separation from power line to the plc communication receiving circuit-coupling-separation process in detail.Coupling from the plc communication radiating circuit to power line-separation-coupling process and said process full symmetric, reversible.，
Please further consult Fig. 4-6, the scheme when adopting Fig. 5, be built in communication equipment by power line communication module, and communication equipment will become a heavy current installation, needs by safety complicated and consuming time, Electro Magnetic Compatibility authentication; Former casing die needs redesign, and the electric model that supplies of whole communication equipment all will change.When adopting Fig. 6 scheme, commercial power interface becomes the communication system of a complexity from a simple AC-DC adapter, original design, and parts selection all will change a lot; Communication module is built in the power supply adaptor of high temperature, high pressure, and its reliability is difficult to be guaranteed; The outer casing mold of power supply adaptor 15 also must change.And the specific embodiment shown in employing Fig. 4 can be avoided the shortcoming of above-mentioned two schemes, only need in power supply adaptor 15 and communication equipment, add coupling-split circuit, can realize communication function, and little to the change of power supply, communication equipment.
Above disclosed be only several specific embodiment of the present utility model, but the utility model is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection range of the present utility model.
Claims (4)
1. the integrated separation circuit of a power line communication High Speed Modulation signal and DC power supply, it is characterized in that, comprise for by High Speed Modulation signal isolated the first coupling capacitance, the first coupling inductance, high-frequency signal transformer, the second coupling capacitance, the second coupling inductance and power supply adaptor for isolate DC power supply from commercial power interface commercial power interface; Described the first coupling capacitance is successively by being electrically connected to power supply adaptor after high-frequency signal transformer and the second coupling capacitance, and described the first coupling inductance is electrically connected to power supply adaptor by the second coupling inductance; Also comprise for isolating the common mode noise rejection device of common-mode noise, described high-frequency signal transformer is electrically connected to the second coupling capacitance by the common mode noise rejection device.
2. the integrated separation circuit of power line communication High Speed Modulation signal according to claim 1 and DC power supply, is characterized in that, described common mode noise rejection device is common mode inductance or reversible balance-to-nonbalance converter.
3. according to the integrated separation circuit of claim 1-2 any one described power line communication High Speed Modulation signal and DC power supply, it is characterized in that, described power supply adaptor is AC-DC adapter or DC-DC adapter.
4. the integrated separation circuit of power line communication High Speed Modulation signal according to claim 3 and DC power supply, is characterized in that, the transformation ratio of described high-frequency signal transformer 1: 1 or 1: n, and wherein n is greater than zero number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320403608 CN203368469U (en) | 2013-07-01 | 2013-07-01 | Coupling separation circuit of power line communication high-speed modulation signal and DC power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320403608 CN203368469U (en) | 2013-07-01 | 2013-07-01 | Coupling separation circuit of power line communication high-speed modulation signal and DC power supply |
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| Publication Number | Publication Date |
|---|---|
| CN203368469U true CN203368469U (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320403608 Expired - Fee Related CN203368469U (en) | 2013-07-01 | 2013-07-01 | Coupling separation circuit of power line communication high-speed modulation signal and DC power supply |
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| CN (1) | CN203368469U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233991A (en) * | 2018-01-09 | 2018-06-29 | 杭州万高科技股份有限公司 | A kind of DC carrier wave communication system based on RS485 |
| CN112285481A (en) * | 2019-07-12 | 2021-01-29 | 北京德意新能科技有限公司 | Device for insulation monitoring and fault positioning of direct-current line |
-
2013
- 2013-07-01 CN CN 201320403608 patent/CN203368469U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233991A (en) * | 2018-01-09 | 2018-06-29 | 杭州万高科技股份有限公司 | A kind of DC carrier wave communication system based on RS485 |
| CN108233991B (en) * | 2018-01-09 | 2021-09-24 | 杭州万高科技股份有限公司 | RS 485-based direct current carrier communication system |
| CN112285481A (en) * | 2019-07-12 | 2021-01-29 | 北京德意新能科技有限公司 | Device for insulation monitoring and fault positioning of direct-current line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20150701 |
|
| EXPY | Termination of patent right or utility model |