CN105226732A - The draw-out power supply circuit of cable temperature monitoring device - Google Patents
The draw-out power supply circuit of cable temperature monitoring device Download PDFInfo
- Publication number
- CN105226732A CN105226732A CN201510788088.2A CN201510788088A CN105226732A CN 105226732 A CN105226732 A CN 105226732A CN 201510788088 A CN201510788088 A CN 201510788088A CN 105226732 A CN105226732 A CN 105226732A
- Authority
- CN
- China
- Prior art keywords
- power supply
- resistance
- draw
- monitoring device
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of draw-out power supply circuit of cable temperature monitoring device, comprise current rectifying and wave filtering circuit, the Voltage stabilizing module be connected with described current rectifying and wave filtering circuit and the super capacitor be connected with described Voltage stabilizing module the getting energy coil, be connected with described secondary side winding of getting energy coil that are sheathed on cable, described Voltage stabilizing module exports DC power supply.Above-mentioned draw-out power supply circuit, solve current transformer and get when can there is small area analysis the problem having " getting energy dead band ", namely primary side current is less, output voltage is low and fail to meet power reguirements, the stand-by power supply adopting super capacitor energy-storage as monitoring system is proposed, in order to using in the occasion of induction power taking deficiency; Solve current transformer and get problem saturated when can there is big current, namely primary side current is larger, output voltage is high, proposes to adopt wide input DC-DC voltage stabilizing circuit to ensure the stable of 5V output voltage, and DC-DC voltage reduction module has relative to linear voltage stabilization the advantage that efficiency is high, volume is little.
Description
Technical field
This relates to cable temperature monitoring field, AC network side, particularly a kind of draw-out power supply circuit of cable temperature monitoring device.
Background technology
The on-line temperature monitoring of cable is very important for system cloud gray model, but because its node is many, wide, the harsh environmental conditions of distribution and monitoring equipment install the reasons such as difficulty, makes monitoring equipment adopt powered battery mode not better to be suitable for.Therefore, in the urgent need to a kind of reliable and stable, easy for installation and non-maintaining power supply solution.The existing monitoring equipment method of supplying power to being applicable to transmission line such as solar energy, capacitance partial pressure etc. are difficult to again to be transplanted to during cable monitoring system powers.Other novel supply power modes as laser, microwave and ultrasound, but face that cost is high, conversion efficiency is low or electromagnetic interference problem.
In view of cable is generally laid in underground, has thicker dielectric protection layer, solar energy and capacitance partial pressure mode can not be adopted.But when cable is operated under single-phase mode, alternating current on its inner wire excites stronger quasistatic magnetic field by Exterior cable space, thus can based on electromagnetic induction principle, utilize Exterior cable to place coil-induced go out voltage and get can, be similar to current transformer principle, and be called current transformer pattern, for improving induced voltage, coil is with cored usually, and its advantage is that structure is simple, but also there is small area analysis and have dead band, big current easily saturated, the overcurrent then problem such as induction overvoltage.However, be equivalent to other energy-provision way, it is more feasible that energy mode got by current transformer.
But current transformer is got can exist certain difficulty technically, main cause is that primary side current excursion is comparatively large, and the voltage after rectifying and wave-filtering there will be large-scale fluctuation, the voltage stabilizing link design comparison difficulty of rear class.Although the method adopting current transformer to open air gap can effectively prevent magnetic core saturated, reduce core loss, but input side curent change scope is restricted, usually the occasion that curent change ratio is less than 20 (maximum is than the ratios of minimum value) is only applicable to, get and can there is work " dead band " by electric current, voltage change range after rectification is simultaneously comparatively large, existing defects in application.
Under if primary side current work wide variation can be realized get can, current transformer get can technology can be more widely used.Therefore, need to solve as early as possible the curent change that current transformer exists not wide, get the problems such as energy efficiency is low, reliability is not high.
Summary of the invention
For above-mentioned the deficiencies in the prior art, technical problem to be solved by this invention is: provide a kind of can realize under primary side current work wide variation get can, improve and get energy efficiency, overcome the draw-out power supply circuit that the cable temperature monitoring device of the deficiency that instrument transformer is easily saturated when having " getting energy dead band ", big current got when can there is small area analysis by current transformer.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the draw-out power supply circuit providing a kind of cable temperature monitoring device, comprise current rectifying and wave filtering circuit, the Voltage stabilizing module be connected with described current rectifying and wave filtering circuit and the super capacitor be connected with described Voltage stabilizing module the getting energy coil, be connected with described secondary side winding of getting energy coil that are sheathed on cable, described Voltage stabilizing module exports DC power supply.
Further, the DC-DC voltage reduction module that described Voltage stabilizing module adopts wide input ,+5V exports.
Further, also comprise be connected to described in get can impact protection circuit between coil and described current rectifying and wave filtering circuit.
Further, the overvoltage crowbar be connected between current rectifying and wave filtering circuit and Voltage stabilizing module is also comprised.
Further; described impact protection circuit comprises the first two-way Transient Suppression Diode and the second two-way Transient Suppression Diode; the first end of first and second two-way Transient Suppression Diode is connected with the described first end getting the secondary side winding of energy coil; second end of first and second two-way Transient Suppression Diode is connected with described the second end getting the secondary side winding of energy coil, and the two ends of first and second two-way Transient Suppression Diode described are also directly connected with the input of current rectifying and wave filtering circuit.
Further, described current rectifying and wave filtering circuit comprises rectifier bridge and filter capacitor C1, the first end of all two-way with first and second Transient Suppression Diode of one of them input of described rectifier bridge is connected, and another input of described rectifier bridge is connected with the second end of first and second two-way Transient Suppression Diode; One of them output of described rectifier bridge is connected with the anode of filter capacitor C1, and another output of described rectifier bridge is connected with the negative terminal of filter capacitor C1, the negativing ending grounding of described filter capacitor C1.
Further, described overvoltage crowbar comprises unidirectional Transient Suppression Diode D3, resistance R1, resistance R2 and metal-oxide-semiconductor Q1, the negative electrode of described unidirectional Transient Suppression Diode D3 is connected with the anode of electric capacity C1, anode is by described resistance R1 ground connection, described unidirectional Transient Suppression Diode D3 is connected with the grid of described metal-oxide-semiconductor with the node between resistance R1, the drain electrode of described metal-oxide-semiconductor Q1 is connected with the negative electrode of described unidirectional Transient Suppression Diode D3 by described resistance R2, the source electrode of described metal-oxide-semiconductor Q1 is connected with described DC-DC voltage reduction module, the drain electrode of described metal-oxide-semiconductor Q1 is also connected with described DC-DC voltage reduction module by described resistance R2.
Further, described DC-DC voltage reduction module comprises step-down chip U1, some resistance, some electric capacity, diode D4, inductance L 1, the VCC pin of described step-down chip U1 is connected with metal-oxide-semiconductor Q1 by interface J3, the TCAP pin of described step-down chip U1 is by electric capacity C2 ground connection, the DRC pin of described step-down chip U1, IS pin, SWC pin is all successively by resistance R3, electric capacity C3 ground connection, also connect with interface J3, the SWE pin of described step-down chip U1 is connected with the negative electrode of described diode D4, the plus earth of described diode D4, the SWE pin of described step-down chip U1 is also successively by inductance L 1, resistance R4, resistance R5 ground connection, described inductance L 1 also passes through electric capacity C4 ground connection with the node of resistance R4, also be connected with first pin of output interface J4, second pin ground connection of described output interface, the CII pin of described step-down chip U1 is connected with the node between resistance R4 with resistance R5, the GND pin ground connection of described step-down chip U1.
Further, energy coil strap is got described in cored.
Further, get described in coil to be current transformer.
The draw-out power supply circuit of cable temperature monitoring device of the present invention, there is following beneficial effect: 1. solve current transformer and get when can there is small area analysis the problem having " getting energy dead band ", namely primary side current is less, output voltage is low and fail to meet power reguirements, the stand-by power supply adopting super capacitor energy-storage as monitoring system is proposed, in order to using in the occasion of induction power taking deficiency; 2. solve current transformer and get problem saturated when can there is big current, namely primary side current is larger, output voltage is high, proposes to adopt wide input DC-DC voltage stabilizing circuit to ensure the stable of 5V output voltage, and DC-DC voltage reduction module has relative to linear voltage stabilization the advantage that efficiency is high, volume is little.Even if when input and output voltage falls very large, efficiency can not reduce, and power supply does not need large radiator; 3. fault-resistant ability is strong.To be short-circuited fault and the overcurrent caused for primary side, secondary side will induce impulse overvoltage, thus devise impact protection circuit, to ensure the safety of rear module.4. circuit is simple, and volume is little, lightweight.Adopt electronic devices and components, be convenient to integrated, this electric supply installation directly can be hung on cable.5. extensibility is strong.Instrument transformer and super capacitor can be adjusted as required, to reach higher output voltage and power.6. easy for installation, adopting open-close type current transformer, can directly be enclosed within existing cable, installing without the need to disconnecting cable joint.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the block diagram of the draw-out power supply circuit of cable temperature monitoring device of the present invention.
Fig. 2 is impact protection circuit in Fig. 1, current rectifying and wave filtering circuit and overvoltage crowbar schematic diagram.
Fig. 3 is DC-DC voltage reduction module schematic diagram in Fig. 1.
Fig. 4 is the source test circuit figure of the draw-out power supply circuit of cable temperature monitoring device of the present invention.
Current transformer output waveform figure when Fig. 5 is primary side input 70A.
Fig. 6 is bridge rectifier output waveform figure.
Fig. 7 is the unloaded output waveform figure of DC-DC voltage reduction module.
Fig. 8 is the graph of relation of draw-out power supply output voltage and load.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1 to Fig. 3; the draw-out power supply circuit of the cable temperature monitoring device of the present embodiment; comprise be sheathed on cable 100 get can coil 201, can coil 201 impact protection circuit 202, the current rectifying and wave filtering circuit 203 be connected with described impact protection circuit 202, the overvoltage crowbar 204 be connected with described current rectifying and wave filtering circuit 203, the Voltage stabilizing module 205 be connected with described overvoltage crowbar 204, the super capacitor 206 that is connected with described Voltage stabilizing module 205 that are connected with described getting, described Voltage stabilizing module 205 exports DC power supply.Cable 100 is through getting energy coil 201; get and can will induce electromotive force in coil 201 two ends; through impact protection circuit 202, current rectifying and wave filtering circuit 203 output dc voltage, then through overvoltage crowbar 204, finally adopt Voltage stabilizing module 205 combining super capacitor 206 to obtain 5V voltage again and export.Wherein:
Described impact protection circuit 202 comprises the first two-way Transient Suppression Diode D1 and the second two-way Transient Suppression Diode D2; the first end of first and second two-way Transient Suppression Diode D1, D2 is connected with the described first end getting the secondary side winding of energy coil 201; second end of first and second two-way Transient Suppression Diode D1, D2 is connected with described the second end getting the secondary side winding of energy coil 201, and the two ends of described first and second two-way Transient Suppression Diode D1, D2 are also directly connected with the input of current rectifying and wave filtering circuit 203.In the present embodiment, the two ends of described first and second two-way Transient Suppression Diode D1, D2 are connected with the two ends of getting energy coil 201 respectively by interface J1.In the present embodiment, described impact protection circuit 202 also comprises resettable fuse F1, and second end of described first and second two-way Transient Suppression Diode D1, D2 is connected with the second end of the secondary side winding of getting energy coil 201 by described resettable fuse F1.Self-recoverage insurance F1 play impulse current protective effect, when be short-circuited fault and electric current excessive time, insurance F1 fusing.Two-way Transient Suppression Diode D1, D2 play surge voltage protective effect; under normal condition, D1, D2 do not work; when secondary side winding induce comparatively HI high impact voltage time; two-way Transient Suppression Diode D1, D2 reverse breakdown; both end voltage clamper numerically certain, protection subsequent conditioning circuit is not damaged by moment impact voltage.
Described current rectifying and wave filtering circuit 203 comprises rectifier bridge and filter capacitor C1, the first end of one of them input all two-way with first and second Transient Suppression Diode D1, D2 of described rectifier bridge is connected, and another input of described rectifier bridge is connected with second end of first and second two-way Transient Suppression Diode D1, D2; One of them output of described rectifier bridge is connected with the anode of filter capacitor C1, and another output of described rectifier bridge is connected with the negative terminal of filter capacitor C1, the negativing ending grounding of described filter capacitor C1.Diode bridge rectifier circuit selected by rectification circuit.C1 is filter capacitor, and consider that secondary side induction voltage waveform may occur larger distortion because magnetic core is saturated, C1 is taken as 3300 μ F bulky capacitor with smooth waveform ripple.
Described overvoltage crowbar 204 comprises unidirectional Transient Suppression Diode D3, resistance R1, resistance R2 and metal-oxide-semiconductor Q1, the negative electrode of described unidirectional Transient Suppression Diode D3 is connected with the anode of electric capacity C1, anode is by described resistance R1 ground connection, described unidirectional Transient Suppression Diode D3 is connected with the grid of described metal-oxide-semiconductor with the node between resistance R1, the drain electrode of described metal-oxide-semiconductor Q1 is connected with the negative electrode of described unidirectional Transient Suppression Diode D3 by described resistance R2, the source electrode of described metal-oxide-semiconductor Q1 is connected with described DC-DC voltage reduction module, the drain electrode of described metal-oxide-semiconductor Q1 is also connected with described DC-DC voltage reduction module by described resistance R2.Transient Suppression Diode D3, resistance R1, R2 and metal-oxide-semiconductor Q1 form overvoltage crowbar 204 jointly.Consider that the follow-up DC-DC voltage reduction module input voltage range upper limit is 40V, therefore, when input voltage is greater than 40V; unidirectional Transient Suppression Diode D3 reverse breakdown, R1 has electric current flow through generation pressure drop, Q1 conducting; resistance R2 forms discharge loop, thus realizes over-voltage protecting function.
Voltage stabilizing circuit adopts DC-DC voltage reduction module, has relative to linear voltage stabilization the advantage that efficiency is high, volume is little.Even if when input and output voltage falls very large, efficiency can not reduce, and power supply does not need large radiator.The input range of selected module is 7 ~ 40V herein, and export as 5V, super capacitor 206 is also received in the output of described Voltage stabilizing module 205.Adopt super capacitor 206 energy storage as the stand-by power supply of monitoring system, solve current transformer small area analysis and there is dead-time problem.
Described Voltage stabilizing module 205 adopts wide input, the DC-DC voltage reduction module that+5V exports, described DC-DC voltage reduction module comprises step-down chip U1, some resistance, some electric capacity, diode D4, inductance L 1, the VCC pin of described step-down chip U1 is connected with metal-oxide-semiconductor Q1 by interface J3, the TCAP pin of described step-down chip U1 is by electric capacity C2 ground connection, the DRC pin of described step-down chip U1, IS pin, SWC pin is all successively by resistance R3, electric capacity C3 ground connection, also connect with interface J3, the SWE pin of described step-down chip U1 is connected with the negative electrode of described diode D4, the plus earth of described diode D4, the SWE pin of described step-down chip U1 is also successively by inductance L 1, resistance R4, resistance R5 ground connection, described inductance L 1 also passes through electric capacity C4 ground connection with the node of resistance R4, also be connected with first pin of output interface J4, second pin ground connection of described output interface, the CII pin of described step-down chip U1 is connected with the node between resistance R4 with resistance R5, the GND pin ground connection of described step-down chip U1.MC34063 chip is selected to make buck converter, it contains the control circuit of DC/DC converter, and main composition part has the voltage source of temperature-compensating, duty ratio controlled oscillator, driver, comparator, High-current output switching circuit and R-S trigger.MC34063 monitors output voltage by outer meeting resistance R1, R2, and chip internal reference voltage is 1.25V, and when output voltage is lower than reference voltage, chip internal comparator exports leaping voltage, and internal trigger S pin is high level; When oscillator is to capacitor charging, R pin is high level, trigger Q is held as high level, thus makes the conducting of output switch pipe, and then have input voltage VIN to charge to improve output voltage VO to output filter electric capacity C2, reach the effect that control VO is stable automatically.
In the present embodiment, described in get can coil 201 be with cored.Reality can reinstate Current Transformer.The present invention adopts open-close type current transformer, can directly be enclosed within existing cable 100, without the need to disconnecting cable 100 jiont treatment.
The draw-out power supply circuit of cable temperature monitoring device of the present invention; cable 100 is through getting energy coil 201; get and can will induce electromotive force in coil 201 two ends; through impact protection circuit 202, current rectifying and wave filtering circuit 203 output dc voltage; again through overvoltage crowbar 204, finally adopt DC-DC Voltage stabilizing module 205 combining super capacitor 206 to obtain 5V voltage again and export.The present invention all adopts analog component, and circuit is simple, cost is low, antijamming capability is strong.Open-close type current transformer is adopted to be convenient to install.Remarkable result of the present invention solves current transformer to get the deficiency that can exist, realize under primary side current work wide variation get can, improve and get energy efficiency.Adopt super capacitor 206 as stand-by power supply; overcome current transformer and get and can exist when small area analysis " get can dead band "; the deficiency that when adopting wide input DC-DC voltage stabilizing circuit to overcome big current, instrument transformer is easily saturated; design surge protection and overvoltage crowbar 204, to ensure the safety of rear module when primary side fault, reliable and stable to be powered for on-line monitoring equipment.
The draw-out power supply circuit of cable temperature monitoring device of the present invention, there is following beneficial effect: 1. solve current transformer and get when can there is small area analysis the problem having " getting energy dead band ", namely primary side current is less, output voltage is low and fail to meet power reguirements, the stand-by power supply adopting super capacitor 206 energy storage as monitoring system is proposed, in order to using in the occasion of induction power taking deficiency; 2. solve current transformer and get problem saturated when can there is big current, namely primary side current is larger, output voltage is high, proposes to adopt wide input DC-DC voltage stabilizing circuit to ensure the stable of 5V output voltage, and DC-DC voltage reduction module has relative to linear voltage stabilization the advantage that efficiency is high, volume is little.Even if when input and output voltage falls very large, efficiency can not reduce, and power supply does not need large radiator; 3. fault-resistant ability is strong.To be short-circuited fault and the overcurrent caused for primary side, secondary side will induce impulse overvoltage, thus devise impact protection circuit 202, to ensure the safety of rear module.4. circuit is simple, and volume is little, lightweight.Adopt electronic devices and components, be convenient to integrated, this electric supply installation directly can be hung on cable 100.5. extensibility is strong.Instrument transformer and super capacitor 206 can be adjusted as required, to reach higher output voltage and power.6. easy for installation, adopting open-close type current transformer, can being directly enclosed within existing cable 100, without the need to disconnecting cable 100 jiont treatment.
Refer to Fig. 4 to Fig. 8, the draw-out power supply circuit of this part to above-mentioned cable temperature monitoring device is tested, testing equipment mainly contains: strong current generator SLQ-500A, oscilloscope UTD1025C, punching open-close type current transformer KHCT911L-600A/5A, and DC-DC voltage reduction module and 0.33F, 5.5V super capacitor 206.For reducing current in wire, primary side instrument transformer punching wire 101 is taken as 10 circles, and input total current is 70A, DC-DC voltage reduction module output no-load.
By the known current transformer works fine of above-mentioned a few width figure, the enough subsequent conditioning circuits of induced voltage of generation use.After DC-DC voltage stabilizing, the+5V left and right voltage of circuit stable output, meets the power reguirements of 5V using electricity system, and can charge to super capacitor 206.
Table 1 is in the loaded situation of band, and controlling primary side input total current is 70A, records output voltage effective value U and power output P under different loads resistance R.
| U（V） | P（mW） | R（ ） |
| 4.6 | 450.2 | 47 |
| 4.8 | 307.2 | 75 |
| 5.0 | 250.0 | 100 |
| 5.6 | 156.8 | 200 |
| 5.8 | 122.3 | 275 |
| 5.8 | 71.5 | 470 |
| 5.8 | 42.0 | 800 |
| 5.8 | 33.6 | 1000 |
Table 1
From the above: for the ac cable 100 of single phasing, available current instrument transformer mode gets energy from cable 100 outside.For improving coil-induced voltage, the available coil containing iron core, considers the convenience of installation simultaneously, and the present invention proposes to adopt punching open-close type current transformer.Voltage stabilizing circuit adopts DC-DC voltage reduction module, and opposite linear voltage stabilizing, even if when input and output voltage falls very large, still keep high efficiency; And power supply does not need large radiator, there is the advantage that volume is little.The test of draw-out power supply shows: herein the draw-out power supply of Design and implementation can reliably working, has certain load capacity, can solve the powerup issue of cable temperature monitoring device.
These are only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. the draw-out power supply circuit of a cable temperature monitoring device, comprise current rectifying and wave filtering circuit, the Voltage stabilizing module be connected with described current rectifying and wave filtering circuit and the super capacitor be connected with described Voltage stabilizing module the getting energy coil, be connected with described secondary side winding of getting energy coil that are sheathed on cable, described Voltage stabilizing module exports DC power supply.
2. the draw-out power supply circuit of cable temperature monitoring device as claimed in claim 1, is characterized in that: the DC-DC voltage reduction module that described Voltage stabilizing module adopts wide input ,+5V exports.
3. the draw-out power supply circuit of cable temperature monitoring device as claimed in claim 2, is characterized in that: also comprise that get described in being connected to can impact protection circuit between coil and described current rectifying and wave filtering circuit.
4. the draw-out power supply circuit of cable temperature monitoring device as claimed in claim 3, is characterized in that: also comprise the overvoltage crowbar be connected between current rectifying and wave filtering circuit and Voltage stabilizing module.
5. the draw-out power supply circuit of cable temperature monitoring device as claimed in claim 4, it is characterized in that: described impact protection circuit comprises the first two-way Transient Suppression Diode and the second two-way Transient Suppression Diode, the first end of first and second two-way Transient Suppression Diode is connected with the described first end getting the secondary side winding of energy coil, second end of first and second two-way Transient Suppression Diode is connected with described the second end getting the secondary side winding of energy coil, the two ends of first and second two-way Transient Suppression Diode described are also directly connected with the input of current rectifying and wave filtering circuit.
6. the draw-out power supply circuit of cable temperature monitoring device as claimed in claim 5, it is characterized in that: described current rectifying and wave filtering circuit comprises rectifier bridge and filter capacitor C1, the first end of all two-way with first and second Transient Suppression Diode of one of them input of described rectifier bridge is connected, and another input of described rectifier bridge is connected with the second end of first and second two-way Transient Suppression Diode; One of them output of described rectifier bridge is connected with the anode of filter capacitor C1, and another output of described rectifier bridge is connected with the negative terminal of filter capacitor C1, the negativing ending grounding of described filter capacitor C1.
7. the draw-out power supply circuit of cable temperature monitoring device as claimed in claim 6, it is characterized in that: described overvoltage crowbar comprises unidirectional Transient Suppression Diode D3, resistance R1, resistance R2 and metal-oxide-semiconductor Q1, the negative electrode of described unidirectional Transient Suppression Diode D3 is connected with the anode of electric capacity C1, anode is by described resistance R1 ground connection, described unidirectional Transient Suppression Diode D3 is connected with the grid of described metal-oxide-semiconductor with the node between resistance R1, the drain electrode of described metal-oxide-semiconductor Q1 is connected with the negative electrode of described unidirectional Transient Suppression Diode D3 by described resistance R2, the source electrode of described metal-oxide-semiconductor Q1 is connected with described DC-DC voltage reduction module, the drain electrode of described metal-oxide-semiconductor Q1 is also connected with described DC-DC voltage reduction module by described resistance R2.
8. the draw-out power supply circuit of cable temperature monitoring device as claimed in claim 7, it is characterized in that: described DC-DC voltage reduction module comprises step-down chip U1, some resistance, some electric capacity, diode D4, inductance L 1, the VCC pin of described step-down chip U1 is connected with metal-oxide-semiconductor Q1 by interface J3, the TCAP pin of described step-down chip U1 is by electric capacity C2 ground connection, the DRC pin of described step-down chip U1, IS pin, SWC pin is all successively by resistance R3, electric capacity C3 ground connection, also connect with interface J3, the SWE pin of described step-down chip U1 is connected with the negative electrode of described diode D4, the plus earth of described diode D4, the SWE pin of described step-down chip U1 is also successively by inductance L 1, resistance R4, resistance R5 ground connection, described inductance L 1 also passes through electric capacity C4 ground connection with the node of resistance R4, also be connected with first pin of output interface J4, second pin ground connection of described output interface, the CII pin of described step-down chip U1 is connected with the node between resistance R4 with resistance R5, the GND pin ground connection of described step-down chip U1.
9. the draw-out power supply circuit of cable temperature monitoring device as claimed in claim 1, is characterized in that: described in get can coil strap cored.
10. the draw-out power supply circuit of cable temperature monitoring device as claimed in claim 9, is characterized in that: described in get coil to be current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510788088.2A CN105226732B (en) | 2015-11-16 | 2015-11-16 | The draw-out power supply circuit of cable temperature monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510788088.2A CN105226732B (en) | 2015-11-16 | 2015-11-16 | The draw-out power supply circuit of cable temperature monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105226732A true CN105226732A (en) | 2016-01-06 |
| CN105226732B CN105226732B (en) | 2018-06-26 |
Family
ID=54995521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510788088.2A Expired - Fee Related CN105226732B (en) | 2015-11-16 | 2015-11-16 | The draw-out power supply circuit of cable temperature monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105226732B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356824A (en) * | 2016-09-21 | 2017-01-25 | 天津百利机械装备研究院有限公司 | 220KV current transformer electricity-using overcurrent protection circuit |
| CN106410981A (en) * | 2016-12-08 | 2017-02-15 | 天津市百利纽泰克电气科技有限公司 | Busbar electricity getting circuit of high-voltage side of current transformer |
| CN106487101A (en) * | 2016-09-13 | 2017-03-08 | 中国农业大学 | A kind of current transformer energy taking device based on load control and method |
| CN108548615A (en) * | 2018-04-17 | 2018-09-18 | 安徽合电正泰电气成套设备有限公司 | Watchband type passive wireless temperature measuring device |
| CN109038865A (en) * | 2018-08-16 | 2018-12-18 | 四川瑞霆电力科技有限公司 | Temperature measuring equipment and its electricity-fetching module, switching power circuit applied to cable accessory |
| CN110095205A (en) * | 2019-05-05 | 2019-08-06 | 新奥数能科技有限公司 | A kind of system monitoring cable temperature |
| CN113437808A (en) * | 2021-05-18 | 2021-09-24 | 中国科学院电工研究所 | Electric energy acquisition device and monitoring system suitable for intelligent motor monitoring |
| CN113746214A (en) * | 2021-08-31 | 2021-12-03 | 西安交通大学 | Power supply circuit for three-core cable thermal state online monitoring system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202634061U (en) * | 2012-04-20 | 2012-12-26 | 东北电力大学 | High-voltage switch monitoring system power supply for transformer station |
| CN103121409A (en) * | 2011-11-18 | 2013-05-29 | 北汽福田汽车股份有限公司 | Automobile braking circuit protecting device and automobile braking device provided with the same |
-
2015
- 2015-11-16 CN CN201510788088.2A patent/CN105226732B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103121409A (en) * | 2011-11-18 | 2013-05-29 | 北汽福田汽车股份有限公司 | Automobile braking circuit protecting device and automobile braking device provided with the same |
| CN202634061U (en) * | 2012-04-20 | 2012-12-26 | 东北电力大学 | High-voltage switch monitoring system power supply for transformer station |
Non-Patent Citations (1)
| Title |
|---|
| 解军等: "电网监测设备TA取能电源性能分析与改进研究", 《电测与仪表》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106487101A (en) * | 2016-09-13 | 2017-03-08 | 中国农业大学 | A kind of current transformer energy taking device based on load control and method |
| CN106356824A (en) * | 2016-09-21 | 2017-01-25 | 天津百利机械装备研究院有限公司 | 220KV current transformer electricity-using overcurrent protection circuit |
| CN106410981A (en) * | 2016-12-08 | 2017-02-15 | 天津市百利纽泰克电气科技有限公司 | Busbar electricity getting circuit of high-voltage side of current transformer |
| CN108548615A (en) * | 2018-04-17 | 2018-09-18 | 安徽合电正泰电气成套设备有限公司 | Watchband type passive wireless temperature measuring device |
| CN109038865A (en) * | 2018-08-16 | 2018-12-18 | 四川瑞霆电力科技有限公司 | Temperature measuring equipment and its electricity-fetching module, switching power circuit applied to cable accessory |
| CN109038865B (en) * | 2018-08-16 | 2024-01-30 | 四川瑞霆智汇科技有限公司 | Temperature measuring device applied to cable accessory, power taking module thereof and switching power supply circuit |
| CN110095205A (en) * | 2019-05-05 | 2019-08-06 | 新奥数能科技有限公司 | A kind of system monitoring cable temperature |
| CN113437808A (en) * | 2021-05-18 | 2021-09-24 | 中国科学院电工研究所 | Electric energy acquisition device and monitoring system suitable for intelligent motor monitoring |
| CN113437808B (en) * | 2021-05-18 | 2022-10-14 | 中国科学院电工研究所 | Electric energy acquisition device and monitoring system suitable for intelligent motor monitoring |
| CN113746214A (en) * | 2021-08-31 | 2021-12-03 | 西安交通大学 | Power supply circuit for three-core cable thermal state online monitoring system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105226732B (en) | 2018-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105226732A (en) | The draw-out power supply circuit of cable temperature monitoring device | |
| CN103219878B (en) | A kind of capacitor discharging circuit and power inverter | |
| CN103457467B (en) | One is isolated buck-type DC-DC converter not | |
| CN103227515A (en) | Non-contact self-powered power supply for overhead high voltage line | |
| CN202150743U (en) | Coupling energy taking power supply system for high voltage transmission line fault monitoring | |
| CN103312178A (en) | Bi-directional DC/DC (direct current/direct current) converter and battery testing device applied with same | |
| CN103647448B (en) | Integrated step-down-flyback type high power factor constant current circuit and device | |
| CN201887660U (en) | LPC switch power supply circuit and air conditioner with same | |
| CN110544942B (en) | Reactive compensation type capacitor voltage-reducing electricity-taking device and working method | |
| CN206865350U (en) | A kind of filter circuit and power supply adaptor | |
| CN101635523A (en) | External mining intrinsic safety power supply | |
| CN101944857B (en) | Power adapter including power reducer | |
| CN107834832A (en) | A kind of voltage peak absorbing circuit | |
| CN104901342A (en) | Capacitor voltage division-based high-voltage electricity taking device | |
| CN104319910A (en) | Power source energy taking circuit based on high-voltage power transmission line | |
| CN102324778A (en) | High-efficiency energy-saving charger | |
| CN201418038Y (en) | External intrinsic safety power supply for mining use | |
| CN206962730U (en) | Integrated PFC high voltage half-bridge resonance synchronous rectification AC/DC power modules | |
| CN203180773U (en) | Passive intelligent power distribution apparatus | |
| CN202334336U (en) | Active electronic type transformer power supply | |
| CN205430061U (en) | Keep apart power adapter system with power factor correction function | |
| CN203840004U (en) | Intelligent high efficiency fast charger | |
| CN203522564U (en) | Power supply circuit used for measurement at high-tension side | |
| CN107749664B (en) | Design circuit of acquisition system emergency power supply | |
| CN201656574U (en) | Non-contact induction power-taking device of power tunnel cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180626 Termination date: 20191116 |