CN103051461A - PLC (Power Line Communication) modem power supply equipment - Google Patents
PLC (Power Line Communication) modem power supply equipment Download PDFInfo
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- CN103051461A CN103051461A CN2012105126416A CN201210512641A CN103051461A CN 103051461 A CN103051461 A CN 103051461A CN 2012105126416 A CN2012105126416 A CN 2012105126416A CN 201210512641 A CN201210512641 A CN 201210512641A CN 103051461 A CN103051461 A CN 103051461A
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Abstract
The invention discloses PLC (Power Line Communication) modem power supply equipment which comprises an AC (Alternate Current) fire wire input end, an AC zero line input end, an AC-DC (Alternate Current to Direct Current) conversion circuit, a first signal coupling circuit, a second signal coupling circuit, a power supply anode output end and a power supply cathode output end. Both input ends of the first signal coupling circuit are respectively connected with the AC fire wire input end and the AC zero line input end; both output ends of the first signal coupling circuit are respectively connected to the power supply anode output end and the power supply cathode output end; both input ends of a zero crossing detection circuit are respectively connected with the AC fire wire input end and the AC zero line input end; an output end of the zero crossing detection circuit is connected to the AC-DC conversion circuit; both input ends of the AC-DC conversion circuit are respectively connected with the AC fire wire input end and the AC zero line input end; both output ends of the AC-DC conversion circuit are respectively connected with two input ends of the second signal coupling circuit; and both output ends of the second signal coupling circuit are respectively connected to the power supply anode output end and the power supply cathode output end. The invention implements the separated PLC modem power supply equipment which adopts a low-voltage power supply manner.
Description
Technical field
The present invention relates to the power communication field, particularly a kind of Homeplug power-supply device.
Background technology
Homeplug has another name called the electric power networks bridger, is a kind of network signal to be modulated on the electric wire, utilizes existing electric wire to solve the equipment of network layout problem.At present, Homeplug is as the third generation networks transmission equipment, and the high speed that not only has netting twine is stable, and also to possess the movement of wireless network convenient.
In Technology of Power Line Communication, Homeplug is used very extensive, it utilizes electric wire to transmit high-frequency signal, the high-frequency signal of carrying information is loaded on the electric current, then transmit with electric wire, the modulator-demodulator of reception information out and is sent to high-frequency signal " decomposition " from electric current on computer or the phone again, thereby realizes online, makes a phone call and watch IPTV on the basis that is not needing rewiring, use the multiple application such as video monitoring equipment.
Present Homeplug equipment is Direct Plug-In substantially, and alternating current 220V directly inputs, and perhaps civil power is directly inputted desktop type Homeplug equipment.
As shown in Figure 1, a kind of zero cross detection circuit of Homeplug power-supply device of prior art, electric-power wire communication signal and power supply three tunnel outputs are independently, and it exports 5 lines.Two is the Homeplug signal of communication, and one is the zero passage detection signal, and other two are respectively VDD-to-VSS.There are the following problems for the Homeplug power-supply device of prior art: slotting wall equipment can only be placed and insert the wall position, can't move, and is dumb; If lengthen the desktop type Homeplug of AC power cord, then have the danger of high-tension electricity; Adopt the Homeplug of separate power supply to have fail safe, can suitably move, but five core power connections are complicated, single core interface that can't be general, cost is high.And cabling is long, and power supply and holding wire intercouple, and disturbs excessive.
Summary of the invention
In order to solve the problems referred to above of prior art, be necessary to provide the Homeplug power-supply device of a kind of separate type and low-voltage power supply.
The technical scheme that technical solution problem of the present invention provides is:
A kind of Homeplug power-supply device, it comprises alternating current fire wire input, alternating current zero line input, AC-DC change-over circuit, first signal coupling circuit, secondary signal coupling circuit, positive source output and power cathode output; Two inputs of first signal coupling circuit are connected with alternating current zero line input with the alternating current fire wire input respectively, and two outputs are connected to respectively positive source output and power cathode output; Two inputs of AC-DC change-over circuit are connected with alternating current zero line input with the alternating current fire wire input respectively, and two outputs are connected with two inputs of secondary signal coupling circuit respectively, and it comprises an output feedback module; Two inputs of zero cross detection circuit are connected with alternating current fire wire input and alternating current zero line are defeated respectively, and output is connected to the output feedback module of AC-DC change-over circuit; Two outputs of secondary signal coupling circuit are connected to respectively positive source output and power cathode output.
Wherein, described first signal coupling circuit comprises communications transformer T1, capacitor C 1, capacitor C 2 and capacitor C 4, capacitor C 4 is connected between the input of power firestreak input and communications transformer T1, another input of communications transformer T1 is connected with the zero line input, and two outputs of communications transformer T1 are connected to positive source output and power cathode output by capacitor C 1 and capacitor C 2 respectively.
Wherein, the secondary signal coupling circuit comprises common mode inductance T2, capacitor C 3, inductance L 1 and inductance L 2, two inputs of common mode inductance T2 are connected with two outputs of AC-DC change-over circuit respectively, two outputs of common mode inductance T2 are connected to positive source output and power cathode output by inductance L 1 and inductance L 2 respectively, and capacitor C 3 is connected with two outputs of common mode inductance T2 respectively.
Wherein, the alternating current fire wire input is connected with alternating current zero line input be connected N with zero line with the live wire (L) of AC power) be connected.
Wherein, the positive source output is respectively applied to be connected with the ground wire link with the data wire link of outside single-core plug with the power cathode output.
Compared with prior art, Homeplug power-supply device of the present invention provides the Homeplug power supply of separate type, has realized guaranteeing simultaneously effective signal of communication in the situation of low tension power supply, for the Homeplug equipment of powering separately provides new trial.
Description of drawings
Fig. 1 is the circuit theory diagrams of the Homeplug power-supply device of prior art.
Fig. 2 is the circuit theory diagrams of Homeplug power-supply device of the present invention.
Embodiment
As shown in Figure 2, the circuit theory diagrams of Homeplug power-supply device of the present invention, it comprises alternating current fire wire input, alternating current zero line input, AC-DC change-over circuit, first signal coupling circuit, secondary signal coupling circuit, positive source output and power cathode output.The AC-DC change-over circuit comprises the output feedback module.The first signal coupling circuit comprises communications transformer T1, capacitor C 1, capacitor C 2 and capacitor C 4.The secondary signal coupling circuit comprises common mode inductance T2, capacitor C 3, inductance L 1 and inductance L 2.
The alternating current fire wire input is respectively applied to be connected with zero line (N) with the live wire (L) of AC power with alternating current zero line input.Two inputs of first signal coupling circuit are connected with alternating current zero line input with the alternating current fire wire input respectively, and two outputs are connected to respectively positive source output and power cathode output.Two inputs of zero cross detection circuit are connected with alternating current fire wire input and alternating current zero line are defeated respectively, and output is connected with the output feedback module of AC-DC change-over circuit.Two inputs of AC-DC change-over circuit are connected with alternating current zero line input with the alternating current fire wire input respectively, and two outputs are connected with two inputs of secondary signal coupling circuit respectively.Two outputs of secondary signal coupling circuit are connected to respectively positive source output and power cathode output.Positive source output and power cathode output are respectively applied to be connected to data wire link and the ground wire link of outside single-core plug.
Capacitor C 4 is connected between the input of power firestreak input and communications transformer T1, another input of communications transformer T1 is connected with the zero line input, and two outputs of communications transformer T1 are connected to positive source output and power cathode output by capacitor C 1 and capacitor C 2 respectively.The secondary signal coupling circuit further comprises common mode inductance T2, capacitor C 3, inductance L 1 and inductance L 2.Two inputs of common mode inductance T2 are connected with two outputs of AC-DC change-over circuit respectively, two outputs of common mode inductance T2 are connected to positive source output and power cathode output by inductance L 1 and inductance L 2 respectively, and capacitor C 3 is connected with two outputs of common mode inductance T2 respectively.
Zero cross detection circuit is used for providing power line zero crossing detection signal.The AC-DC change-over circuit is used for the 220V electric main is converted to DC power supply, and it mainly is 12V that the DC power supply after the conversion provides, 5V.The effect of output feedback module is according to the feedback adjusting output voltage, by gathering the zero passage detection signal, make the DC power supply voltage of AC-DC change-over circuit output do cyclic variation with the period of change of alternating current, thereby so that Homeplug equipment can restore zero cross signal by the cyclic variation of DC power supply voltage.The effect of capacitor C 4 is isolation alternating currents, and the coupling path of electric-power wire communication signal is provided simultaneously.The effect of communications transformer T1 provides the coupling path of electric-power wire communication signal.When the effect of capacitor C 1, C2 provided coupling path, the isolated DC out-put supply was to the feedback of communications transformer T1.Common mode inductance T2, capacitor C 3, inductance L 1 and inductance L 2 consist of low pass filter together, the isolation high-frequency communication signal.
The first signal coupling circuit will be coupled in the alternating current signal extraction of two-way plc communication out, be transported to the cathode output end of Homeplug power-supply device, with the zero passage detection signal coupling in the output cycle of DC power supply, thereby realized the two-way output of Homeplug power-supply device, can be connected with outside single-core plug.
Compared with prior art, Homeplug power-supply device of the present invention provides the Homeplug power supply of separate type, has realized guaranteeing simultaneously effective signal of communication in the situation of low tension power supply, for the Homeplug equipment of powering separately provides new trial.
Above content is the further description of the present invention being done in conjunction with concrete preferred implementation, can not assert that implementation of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (5)
1. Homeplug power-supply device, its spy is being, comprises alternating current fire wire input, alternating current zero line input, AC-DC change-over circuit, first signal coupling circuit, secondary signal coupling circuit, positive source output and power cathode output;
Two inputs of first signal coupling circuit are connected with alternating current zero line input with the alternating current fire wire input respectively, and two outputs are connected to respectively positive source output and power cathode output;
Two inputs of AC-DC change-over circuit are connected with alternating current zero line input with the alternating current fire wire input respectively, and two outputs are connected with two inputs of secondary signal coupling circuit respectively, and it comprises an output feedback module;
Two inputs of zero cross detection circuit are connected with alternating current fire wire input and alternating current zero line are defeated respectively, and output is connected to the output feedback module of AC-DC change-over circuit;
Two outputs of secondary signal coupling circuit are connected to respectively positive source output and power cathode output.
2. Homeplug power-supply device according to claim 1, it is characterized in that, described first signal coupling circuit comprises communications transformer T1, capacitor C 1, capacitor C 2 and capacitor C 4, capacitor C 4 is connected between the input of power firestreak input and communications transformer T1, another input of communications transformer T1 is connected with the zero line input, and two outputs of communications transformer T1 are connected to positive source output and power cathode output by capacitor C 1 and capacitor C 2 respectively.
3. Homeplug power-supply device according to claim 1, it is characterized in that, the secondary signal coupling circuit comprises common mode inductance T2, capacitor C 3, inductance L 1 and inductance L 2, two inputs of common mode inductance T2 are connected with two outputs of AC-DC change-over circuit respectively, two outputs of common mode inductance T2 are connected to positive source output and power cathode output by inductance L 1 and inductance L 2 respectively, and capacitor C 3 is connected with two outputs of common mode inductance T2 respectively.
4. Homeplug power-supply device according to claim 1 is characterized in that, the alternating current fire wire input is connected with alternating current zero line input be connected N with zero line with the live wire (L) of AC power) be connected.
5. Homeplug power-supply device according to claim 1 is characterized in that, the positive source output is respectively applied to be connected with the ground wire link with the data wire link of outside single-core plug with the power cathode output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210512641.6A CN103051461B (en) | 2012-12-04 | 2012-12-04 | A kind of Homeplug power-supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210512641.6A CN103051461B (en) | 2012-12-04 | 2012-12-04 | A kind of Homeplug power-supply device |
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| Publication Number | Publication Date |
|---|---|
| CN103051461A true CN103051461A (en) | 2013-04-17 |
| CN103051461B CN103051461B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210512641.6A Expired - Fee Related CN103051461B (en) | 2012-12-04 | 2012-12-04 | A kind of Homeplug power-supply device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040110483A1 (en) * | 2002-12-10 | 2004-06-10 | Mollenkopf James Douglas | Power line communication sytem and method |
| KR20090013359A (en) * | 2007-08-01 | 2009-02-05 | 한국전기연구원 | Circuit for reducing stand by power consumption in power supply device having power line communication function |
| CN101635522A (en) * | 2009-06-26 | 2010-01-27 | 江苏利通电子有限公司 | Switch power supply for powerline carrier communication modem |
| CN101908911A (en) * | 2010-08-31 | 2010-12-08 | 刘利华 | Intelligent home control system and method for networking by utilizing power line and remote controllers |
| CN201797502U (en) * | 2010-07-17 | 2011-04-13 | 刘利华 | Intelligent touch switch for power line carrier network |
-
2012
- 2012-12-04 CN CN201210512641.6A patent/CN103051461B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040110483A1 (en) * | 2002-12-10 | 2004-06-10 | Mollenkopf James Douglas | Power line communication sytem and method |
| KR20090013359A (en) * | 2007-08-01 | 2009-02-05 | 한국전기연구원 | Circuit for reducing stand by power consumption in power supply device having power line communication function |
| CN101635522A (en) * | 2009-06-26 | 2010-01-27 | 江苏利通电子有限公司 | Switch power supply for powerline carrier communication modem |
| CN201797502U (en) * | 2010-07-17 | 2011-04-13 | 刘利华 | Intelligent touch switch for power line carrier network |
| CN101908911A (en) * | 2010-08-31 | 2010-12-08 | 刘利华 | Intelligent home control system and method for networking by utilizing power line and remote controllers |
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| CN103051461B (en) | 2016-01-20 |
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