CN207265678U - A kind of power supply circuit for monitoring of equipment terminal by rail - Google Patents
A kind of power supply circuit for monitoring of equipment terminal by rail Download PDFInfo
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- CN207265678U CN207265678U CN201721059814.8U CN201721059814U CN207265678U CN 207265678 U CN207265678 U CN 207265678U CN 201721059814 U CN201721059814 U CN 201721059814U CN 207265678 U CN207265678 U CN 207265678U
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Abstract
It the utility model is related to a kind of power supply circuit for monitoring of equipment terminal by rail, the circuit includes electromagnetic compatibility unit, isolating transformer, rectification filtering unit and signal isolation reactor, the input terminal access alternating current power line of the electromagnetic compatibility unit, the input terminal of output terminal and isolating transformer connects, the output terminal of the isolating transformer and the input terminal of rectification filtering unit connect, the output terminal of the rectification filtering unit is connected with the input terminal of signal isolation reactor, the output terminal of the signal isolation reactor is connected with monitoring of equipment terminal by rail.Compared with prior art, the utility model has the advantages that high transmission of electricity efficiency, good communication quality and interference are small.
Description
Technical field
Power carrier field is the utility model is related to, more particularly, to a kind of confession for monitoring of equipment terminal by rail
Circuit.
Background technology
Power carrier is applied more in civil field at present, is mainly used in electricity meter-reading, street lamp detection and photovoltaic generation
The projects such as monitoring, it is powered and the circuit of communication is utility grid, and there is voltage instability, and circuit noise is big, transmission range
It is short, the shortcomings of signal stabilization is poor, and real-time communication is low.At present, power carrier is applied less in railway territory, still belongs to starting
Stage, power supply generally use ac power supply method.Due to Alternating Current Power Supply there are power factor (for general line power factor
Less than 0.8) problem, transmission of electricity efficiency is relatively low, and interference of power frequency (50Hz) harmonic wave to power carrier is larger, can directly affect logical
Believe quality.
Utility model content
The purpose of this utility model is to provide a kind of power supply for monitoring of equipment terminal by rail regarding to the issue above
Circuit.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of power supply circuit for monitoring of equipment terminal by rail, the circuit include electromagnetic compatibility unit, isolation
Transformer, rectification filtering unit and signal isolation reactor, the input terminal access alternating current power line of the electromagnetic compatibility unit are defeated
The input terminal of outlet and isolating transformer connects, and the output terminal of the isolating transformer and the input terminal of rectification filtering unit connect
Connect, the output terminal of the rectification filtering unit is connected with the input terminal of signal isolation reactor, the signal isolation reactor
Output terminal is connected with monitoring of equipment terminal by rail.
The electromagnetic compatibility unit includes sequentially connected varistor component and capacitance component, the varistor component
Alternating current power line is accessed with capacitance component, the capacitance component is connected with isolating transformer.
The varistor component includes the first varistor, the second varistor and the 3rd varistor, and described first
The both ends of varistor are respectively connected between the firewire and zero curve of alternating current power line, the both ends of second varistor respectively with
The firewire of alternating current power line is connected with ground wire, the both ends of the 3rd varistor zero curve and ground wire with alternating current power line respectively
Connection.
The capacitance component includes the first capacitance, the second capacitance and the 3rd capacitance, and the both ends of first capacitance connect respectively
Between the firewire and zero curve that enter alternating current power line, the first end of second capacitance is respectively with the firewire of alternating current power line and isolating
The first terminals connection of transformer, the second end of second capacitance are connected with ground wire, the first end point of the 3rd capacitance
It is not connected with the zero curve of alternating current power line and the second terminals of isolating transformer, second end and the ground wire of the 3rd capacitance connect
Connect.
The rectification filtering unit includes rectifier bridge, the 3rd capacitance and the 4th capacitance, the first input end of the rectifier bridge
It is connected with the 3rd terminals of isolating transformer, the second input terminal of the rectifier bridge and the 4th terminals of isolating transformer connect
Connect, after the 3rd capacitance and the 4th capacitance parallel connection, respectively the first output terminal with rectifier bridge, rectifier bridge the second output terminal and
Signal isolation reactor connects.
The circuit further includes lightning protection unit, and the lightning protection unit accesses alternating current power line, and electric with signal isolation respectively
Anti- device is connected with monitoring of equipment terminal by rail.
The lightning protection unit includes the 4th varistor and discharge tube, after the 4th varistor and the discharge tube series connection
Monitoring of equipment terminal is connected first end by the firewire with alternating current power line, signal isolation reactor and rail respectively, after series connection
Second end be connected respectively with monitoring of equipment terminal by the zero curve and rail of alternating current power line.
The monitoring terminal of the railway trackside equipment includes collection extension set and communication extension set.
Compared with prior art, the utility model has the advantages that：
(1) the utility model proposes power supply circuit, pass through electromagnetic compatibility unit, isolating transformer, rectification filtering unit
Cooperation between signal isolation reactor, monitoring of equipment terminal by rail and 220V electric mains is completely isolated, avoid
The noise intrusion communication extension set and collection extension set of power grid, improve transmission of electricity efficiency and communication quality.
(2) the first varistor in electromagnetic compatibility unit can absorb the surge or lightning stroke ripple arteries and veins between alternating current power line
Punching, makes impulse amplitude clamp in 470V or so, so as to protect subsequent conditioning circuit；The second varistor and the 3rd varistor can at the same time
To absorb the lightning stroke wave impulse between alternating current power line and ground wire, make impulse amplitude clamp in 470V or so, prevent between line-ground absolutely
Edge is breakdown.
(3) first capacitances are mainly used to absorb the DM EMI and electric fast-pulse between alternating current power line, the second electricity
Hold and the 3rd capacitance is used for filtering the common mode interference between alternating current power line and ground wire.
(4) isolating transformer on the one hand can be completely isolated by monitoring of equipment terminal by rail and 220V electric mains,
The transmission of high-frequency noise can also be effectively obstructed at the same time, subsequent conditioning circuit power supply is floated ground, prevents staff from getting an electric shock, and ensured open-minded
The safety of maintenance personnel.
(5) direct current supply is changed into by rectifier bridge Alternating Current Power Supply, can effectively reduces industrial frequency harmonic to carrier signal
Interference.
(6) extension set that communicates can be sent the low-resistance device to the carrier signal of power line and input side by signal isolation reactor
Effectively isolated, also can effectively reduce the decay for the small-signal sent from distal end collection extension set, ensure communication extension set
Remote sends and collection extension set signal normally received.
(7) lightning protection unit can preferably absorb the lightning stroke from trackside power line and the energy of surge pulse, it is ensured that communication
Extension set it is safe for operation
Brief description of the drawings
Fig. 1 is the schematic block circuit diagram of the utility model；
Fig. 2 is the circuit diagram of the utility model；
Wherein, 1 is electromagnetic compatibility unit, and 2 be isolating transformer, and 3 be rectification filtering unit, and 4 be signal isolation reactor,
5 be lightning protection unit, and 6 be communication extension set.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
As shown in Figure 1, a kind of power supply circuit for monitoring of equipment terminal by rail is present embodiments provided, including electricity
Magnetic compatible unit 1, isolating transformer 2, rectification filtering unit 3 and signal isolation reactor 4, the input terminal of electromagnetic compatibility unit 1
Alternating current power line is accessed, output terminal is connected with the input terminal of isolating transformer 2, the output terminal and rectifying and wave-filtering of isolating transformer 2
The input terminal connection of unit 3, the output terminal of rectification filtering unit 3 are connected with the input terminal of signal isolation reactor 4, signal isolation
The output terminal of reactor 4 is connected with monitoring of equipment terminal by rail.
Wherein, electromagnetic compatibility unit 1 includes sequentially connected varistor component and capacitance component, varistor component and
Capacitance component accesses alternating current power line, and capacitance component is connected with isolating transformer 2.Varistor component includes the first pressure-sensitive electricity
Resistance, the second varistor and the 3rd varistor, the both ends of the first varistor are respectively connected to the firewire and zero of alternating current power line
Between line, the both ends of the second varistor are connected with the firewire and ground wire of alternating current power line respectively, the both ends of the 3rd varistor
It is connected respectively with the zero curve and ground wire of alternating current power line.Capacitance component includes the first capacitance, the second capacitance and the 3rd capacitance, and first
The both ends of capacitance are respectively connected between the firewire and zero curve of alternating current power line, the first end of the second capacitance respectively with alternating current power line
Firewire connected with the first terminals of isolating transformer 2, the second end of the second capacitance is connected with ground wire, the first of the 3rd capacitance
End is connected with the zero curve of alternating current power line and the second terminals of isolating transformer 2 respectively, the second end and ground wire of the 3rd capacitance
Connection.Rectification filtering unit 3 includes rectifier bridge, the 3rd capacitance and the 4th capacitance, and the first input end of rectifier bridge is with isolating transformation
The 3rd terminals connection of device 2, the second input terminal of rectifier bridge are connected with the 4th terminals of isolating transformer 2, the 3rd capacitance
After the 4th capacitance parallel connection, the second output terminal and signal isolation reactor 4 of the first output terminal with rectifier bridge, rectifier bridge respectively
Connection.Circuit further includes lightning protection unit 5, and lightning protection unit 5 accesses alternating current power line, and respectively with signal isolation reactor 4 and iron
Monitoring of equipment terminal connection by rail.Lightning protection unit 5 includes the 4th varistor and discharge tube, the 4th varistor and discharge tube
Monitoring of equipment terminal connects first end after series connection by the firewire with alternating current power line, signal isolation reactor 4 and rail respectively
Connect, the second end after series connection is connected with monitoring of equipment terminal by the zero curve and rail of alternating current power line respectively.Set by rail
Standby monitoring terminal includes collection extension set and communication extension set 6.
For the physical circuit realized according to said structure as shown in Fig. 2, in the present embodiment, electromagnetic compatibility unit 1 includes 3 pressures
Quick resistance, model 20D471K, Ru1 are connected between line-line, and Ru2, Ru3 are connected between line-ground respectively；1 X capacitance, uses
Safety capacitance, specification 0.1u/275VAC, is connected between line-line；2 Y capacitances, using 1500P/300VAC, are connected to respectively
Between line-ground.Isolating transformer T1 uses high-quality R-type core coiling, and 1:The isolation output of 1 turn ratio, is connected to EMC unit output terminals.
Rectification filtering unit 3 includes 1 rectifier bridge N1, model KBJ1010, and input connects the output terminal of transformer T1；1 electrolytic capacitor
C1, specification 330u/450V, 1 safety capacitance C2, specification 0.1u/275VAC, are connected to the output terminal of rectifier bridge N1；Letter
Number isolation reactor L1, specification 100uH/3A, are connected to the cathode of C1.Lightning protection unit 5, including 1 varistor Ru4, model
14D471K；1 discharge tube G1, model UN2E5-470L；After Ru4 is connected with G1, termination a L1's, another termination C1 is negative
Pole.
The operation principle of the circuit is：Alternating current AC220V passes through EMC units (i.e. electromagnetic compatibility unit 1), and wherein Ru1 is used for
Surge between Absorption Line-line or lightning stroke wave impulse, make impulse amplitude clamp in 470V or so, for protecting subsequent conditioning circuit.Ru2、
Ru3 is used for the lightning stroke wave impulse between Absorption Line-ground, makes impulse amplitude clamp in 470V or so, prevents from insulating between line-ground being hit
Wear.Cx is mainly used to DM EMI and electric fast-pulse between Absorption Line-line, and Cy1, Cy2, which are used for common mode between filtering line-ground, to be done
Disturb；Alternating current is sent after EMC purification units to isolating transformer T1, the effect of isolating transformer：A, inside and outside mainly to system
Electrically isolated；B, the transmission of high-frequency noise can be effectively obstructed, subsequent conditioning circuit power supply is floated ground, prevents from getting an electric shock, is ensured open-minded
The safety of maintenance personnel；Alternating current is through 1:Rectified bridge N1 is converted to direct current again after the output of 1 transformer isolation, wherein C1 to rectification
" steamed bun " ripple afterwards carries out smothing filtering, and C2 filters the high-frequency signal on circuit, is allowed to the smooth straight of output about 310V
Galvanic electricity pressure, the purpose of rectification are mainly the interference for reducing industrial frequency harmonic to carrier signal；The DC voltage of output passes through signal again
Isolation reactor L1 send to power circuit and provides electric power for outdoor trackside detection unit.Signal isolation reactor can be by PLC carrier waves
Machine is sent to the carrier signal of power line is effectively isolated with the low-resistance device of input side, also can effectively be reduced from distal end
The decay for the small-signal that collection extension set is sent, ensures that the remote of communication extension set 6 is sent and to the normal of collection extension set signal
Receive；Lightning protection unit 5, is in series using Ru4 and G1, consumption of the main capacitance considered in varistor to carrier signal.And
Lightning protection assembled unit can preferably absorb the lightning stroke from trackside power line and the energy of surge pulse, it is ensured that communication extension set 6
It is safe for operation.
Claims (8)
1. a kind of power supply circuit for monitoring of equipment terminal by rail, it is characterised in that the circuit includes electromagnetic compatibility
Unit, isolating transformer, rectification filtering unit and signal isolation reactor, the input terminal access alternating current of the electromagnetic compatibility unit
The input terminal connection of power line, output terminal and isolating transformer, the output terminal of the isolating transformer and rectification filtering unit
Input terminal connects, and the output terminal of the rectification filtering unit is connected with the input terminal of signal isolation reactor, the signal isolation
The output terminal of reactor is connected with monitoring of equipment terminal by rail.
2. the power supply circuit according to claim 1 for monitoring of equipment terminal by rail, it is characterised in that the electricity
Magnetic compatible unit includes sequentially connected varistor component and capacitance component, and the varistor component and capacitance component connect
Enter alternating current power line, the capacitance component is connected with isolating transformer.
3. the power supply circuit according to claim 2 for monitoring of equipment terminal by rail, it is characterised in that the pressure
Quick resistor assembly includes the first varistor, the second varistor and the 3rd varistor, the both ends of first varistor
It is respectively connected between the firewire and zero curve of alternating current power line, the both ends of second varistor fire with alternating current power line respectively
Line is connected with ground wire, and the both ends of the 3rd varistor are connected with the zero curve and ground wire of alternating current power line respectively.
4. the power supply circuit according to claim 2 for monitoring of equipment terminal by rail, it is characterised in that the electricity
Holding component includes the first capacitance, the second capacitance and the 3rd capacitance, and the both ends of first capacitance are respectively connected to alternating current power line
Between firewire and zero curve, the first end of second capacitance connects with the firewire of alternating current power line and the first of isolating transformer respectively
Line end connects, and the second end of second capacitance is connected with ground wire, the first end of the 3rd capacitance respectively with alternating current power line
Zero curve connected with the second terminals of isolating transformer, the second end of the 3rd capacitance is connected with ground wire.
5. the power supply circuit according to claim 1 for monitoring of equipment terminal by rail, it is characterised in that described whole
Stream filter unit includes rectifier bridge, the 3rd capacitance and the 4th capacitance, the first input end of the rectifier bridge and isolating transformer
3rd terminals connect, and the second input terminal of the rectifier bridge and the 4th terminals of isolating transformer connect, the 3rd electricity
After appearance and the 4th capacitance parallel connection, the first output terminal with rectifier bridge, the second output terminal of rectifier bridge and signal isolation reactance respectively
Device connects.
6. the power supply circuit according to claim 1 for monitoring of equipment terminal by rail, it is characterised in that the electricity
Road further includes lightning protection unit, and the lightning protection unit accesses alternating current power line, and respectively with by signal isolation reactor and rail
Monitoring of equipment terminal connects.
7. the power supply circuit according to claim 6 for monitoring of equipment terminal by rail, it is characterised in that described anti-
Thunder unit includes the 4th varistor and discharge tube, the first end after the 4th varistor and the discharge tube series connection respectively with city
Monitoring of equipment terminal connects by the firewire of electric power line, signal isolation reactor and rail, the second end after series connection respectively with
The zero curve of alternating current power line is connected with monitoring of equipment terminal by rail.
8. the power supply circuit according to claim 1 for monitoring of equipment terminal by rail, it is characterised in that the iron
The monitoring terminal of road trackside equipment includes collection extension set and communication extension set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721059814.8U CN207265678U (en) | 2017-08-23 | 2017-08-23 | A kind of power supply circuit for monitoring of equipment terminal by rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721059814.8U CN207265678U (en) | 2017-08-23 | 2017-08-23 | A kind of power supply circuit for monitoring of equipment terminal by rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207265678U true CN207265678U (en) | 2018-04-20 |
Family
ID=61922144
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721059814.8U Active CN207265678U (en) | 2017-08-23 | 2017-08-23 | A kind of power supply circuit for monitoring of equipment terminal by rail |
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| Country | Link |
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| CN (1) | CN207265678U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108958127A (en) * | 2018-07-31 | 2018-12-07 | 深圳市道尔智控科技股份有限公司 | A kind of control circuit and control method of pedestrian guardrail |
| CN109510185A (en) * | 2018-12-07 | 2019-03-22 | 北京世纪瑞尔技术股份有限公司 | A kind of signal isolating device of anti-electric railway traction reflux interference |
-
2017
- 2017-08-23 CN CN201721059814.8U patent/CN207265678U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108958127A (en) * | 2018-07-31 | 2018-12-07 | 深圳市道尔智控科技股份有限公司 | A kind of control circuit and control method of pedestrian guardrail |
| CN109510185A (en) * | 2018-12-07 | 2019-03-22 | 北京世纪瑞尔技术股份有限公司 | A kind of signal isolating device of anti-electric railway traction reflux interference |
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