CN203840201U - Power supply circuit for network distribution equipment temperature rise monitoring device - Google Patents
Power supply circuit for network distribution equipment temperature rise monitoring device Download PDFInfo
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- CN203840201U CN203840201U CN201420279533.3U CN201420279533U CN203840201U CN 203840201 U CN203840201 U CN 203840201U CN 201420279533 U CN201420279533 U CN 201420279533U CN 203840201 U CN203840201 U CN 203840201U
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- 238000004146 energy storage Methods 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 41
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- 102100036894 Protein patched homolog 2 Human genes 0.000 claims description 17
- 101710161395 Protein patched homolog 2 Proteins 0.000 claims description 17
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- 238000006243 chemical reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
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- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
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- 230000002441 reversible effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 102100028680 Protein patched homolog 1 Human genes 0.000 description 1
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- 238000002679 ablation Methods 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
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- 239000003381 stabilizer Substances 0.000 description 1
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Abstract
The utility model discloses a power supply circuit for a network distribution equipment temperature rise monitoring device. The power supply circuit comprises an input circuit and an output circuit. The input circuit comprises an overcurrent protection circuit and a filtering energy storage circuit. The overcurrent protection circuit is connected with a plugging joint J2 and is connected with an external power source through the plugging joint J2. The output circuit comprises a voltage reduction circuit, a voltage-stabilization filter circuit, feedback resistors R4-R6 and an energy-storage inductor L2. The feedback resistors R4-R6 and the energy-storage inductor L2 are connected between the voltage reduction circuit and the voltage-stabilization filter circuit. The power supply circuit for the network distribution equipment temperature rise monitoring device has the advantages of high power supply reliability, low power consumption and strong anti-interference capability and the like.
Description
Technical field
The utility model relates to a kind of power circuit of distribution net equipment temperature rise monitoring device.
Background technology
The controller switching equipment of electric power system is generally made up of electric equipments such as circuit breaker, ring main unit, cable, bus, switch cubicles.It is each other by connections such as bus, lead-in wire, cables, because electric current flows through generation heat, so nearly all electric fault all can cause the variation of fault point temperature.The monitoring of temperature to realizing high temperature, the abnormal Real-time Alarm of power equipment such as be rapidly heated, can find in time and treatment facility excess temperature phenomenon, avoid ablation to cause serious equipment breakdown, contribute to quick positioning equipment hidden danger, Accident prevention occurs, and accomplishes to prevent trouble before it happens.Provide important evaluation foundation for realizing equipment state overhauling simultaneously, alleviate the operating pressure of a line producers collecting device state, in implementation efficiency and intellectual analysis level, there is great advantage, distribution net equipment maintenance is changed to repair based on condition of component from periodic inspection.
Distribution net equipment temperature rise monitoring device generally adopts solar panels batteries or gets and can carry out power taking by CT, select suitable supply power mode according to different site of deployment, generally adopt the mode of solar panels batteries at outdoor or the sun-drenched distribution net equipment in field.Can be more for convenience when using CT to get at city backbone network node or load current larger part.Two kinds of modes are generally voltage DC12V, electric current 500-1500mA output, power output is less, due to the long-time non-stop run of temperature rise monitoring device, for the reliability of safeguards system, conversion efficiency and the low-power consumption of distribution net equipment temperature rise monitoring device power circuit seem particularly important.
The power supply unit of distribution net equipment temperature rise monitoring device, its power supply characteristic is trickle continued power, provides high-power ability mostly poor.So require the interior Power Management Design efficiency of temperature rise monitoring device more high better, and there is the ability of overcurrent protection and short-circuit protection, and reduce the probability that burns out device.The input of described power circuit is connected with the output of power supply unit.
Fig. 2 is the power circuit of the distribution net equipment temperature rise monitoring device of existing techniques in realizing.J1 is supply socket, resettable fuse PTC1 and TVS-D2 collaborative can anti-overflow, anti-pulse voltage, C1 and C3 are filter capacitor, U1 is that electric pressure converter converts DC12V to DC5V, for load below provides power supply, C2 and C4 are low-voltage filter electric capacity, and C5 is storage capacitor, realize the instantaneous power consumption of rear class load or transmitted signal module.
The subject matter that prior art exists: this circuit design energy conversion efficiency is low, non-low-power consumption, particularly, in the situation that getting energy difficulty, has wasted more energy.For example: in the time that circuit load is 500mA, this circuit input voltage 12V, electric current 500mA, output voltage 5V, electric current 500mA, power consumption is 3.5W so, conversion efficiency is only 41.67%.And need instantaneously powerful time in rear class, power supply changeover device U1 only cannot provide and provide limited power by capacitor C 5 energy storage.So Fig. 1 circuit has the problems such as high power consumption and poor reliability.
Utility model content
The utility model is the weak point existing in above-mentioned prior art for avoiding, and a kind of power circuit of distribution net equipment temperature rise monitoring device is provided, to reduce power consumption, to improve power supply reliability and antijamming capability.
The utility model be technical solution problem by the following technical solutions.
The power circuit of distribution net equipment temperature rise monitoring device, its design feature is to comprise input circuit and output circuit; Described input circuit comprises current foldback circuit and filtering accumulator; Described current foldback circuit is connected with connection-peg J2, and connects external power source by connection-peg J2; Described output circuit comprises reduction voltage circuit, filter circuit of pressure-stabilizing and feedback resistance R4～R6, energy storage inductor L2; Described feedback resistance R4～R6, energy storage inductor L2 are connected between described reduction voltage circuit, filter circuit of pressure-stabilizing.
The design feature of the power circuit of distribution net equipment temperature rise monitoring device of the present utility model is also:
Described current foldback circuit comprises resettable fuse PTC2 and TVS pipe D3; One end of described resettable fuse PTC2 is connected with a terminal of described connection-peg J2, the other end of described resettable fuse PTC2 is connected with the negative pole of described TVS pipe D3, and the described TVS pipe positive pole of D3 and another terminal of described connection-peg J2 are connected.
Described filtering accumulator comprises alminium electrolytic condenser C7～C8, inductance L 1, nonpolarity ceramic disc capacitor C9～C10; The positive pole of described alminium electrolytic condenser C7 is connected with one end of inductance L 1, and the other end of alminium electrolytic condenser C7 is connected and ground connection with the positive pole of described TVS pipe D3; One end after being connected in parallel between two between described alminium electrolytic condenser C8, nonpolarity ceramic disc capacitor C9, C10 is connected with the other end of described inductance L 1, is also connected with the reduction voltage circuit of described output circuit simultaneously; Other end ground connection after being connected in parallel between two between described alminium electrolytic condenser C8, nonpolarity ceramic disc capacitor C9, C10.
Described reduction voltage circuit comprises supply convertor U2, bootstrap capacitor C6 and Schottky diode D4; Described supply convertor U2 is connected with the filtering accumulator of described input circuit; Described Schottky diode D4 is connected with described supply convertor U2 by described bootstrap capacitor C6;
Described filter circuit of pressure-stabilizing comprises alminium electrolytic condenser C11, C12 and nonpolarity ceramic disc capacitor C13; One end between described alminium electrolytic condenser C11, C12 and nonpolarity ceramic disc capacitor C13 after parallel connection is between two connected with described supply convertor U2 by energy storage inductor L2, the other end between described alminium electrolytic condenser C11, C12 and nonpolarity ceramic disc capacitor C13 after parallel connection is between two connected with one end of feedback resistance R4, and the other end of described feedback resistance R4 is connected with described supply convertor U2 with feedback resistance R5 by feedback resistance R6 successively.
Compared with the prior art, the utility model beneficial effect is embodied in:
The power circuit of distribution net equipment temperature rise monitoring device of the present utility model, its input circuit comprises resettable fuse PTC2, voltage-stabiliser tube D3, storage capacitor C7, C8, filter inductance L1, the components and parts such as filter capacitor C9, C10, its output circuit comprises inductance L 2, capacitor C 6, C11, C12, C13, resistance R 4, R5, R6, DC/DC supply convertor U2, the components and parts such as Schottky diode D4.
In the input stage design of power circuit of the present utility model; adopt safeguard measure; can effectively prevent the problem such as short circuit, overcurrent of circuit input; and according to the characteristic of power supply unit; before supply convertor U2, adopt storage capacitor, it is steady that the instantaneous power of guarantee U2 is supplied, the quality of power supply ripple that output stage has adopted filter capacitor effective guarantee; and adopt Schottky diode to coordinate supply convertor U2, its conversion efficiency is effectively promoted.It is lower that such power circuit design makes it power consumption, and instantaneous power is more reliable, efficiently solves the deficiencies in the prior art.
The power circuit of distribution net equipment temperature rise monitoring device of the present utility model, is especially applicable to the distributed distribution net equipment temperature rise monitoring device of needs wireless transmission, realizes the Power Management Design of distribution net equipment temperature rise monitoring device with the power circuit of low power consumption high efficiency; Increase safety protective circuit, realize the security performance of temperature rise monitoring device, there is the advantages such as the high and low power consumption of power supply reliability, antijamming capability are strong.
Brief description of the drawings
Fig. 1 is the schematic diagram of the power circuit of distribution net equipment temperature rise monitoring device of the present utility model.
Fig. 2 is the schematic diagram of the power circuit of the distribution net equipment temperature rise monitoring device of prior art.
Below pass through embodiment, and the utility model is described in further detail by reference to the accompanying drawings.
Embodiment
Referring to Fig. 1, the power circuit of distribution net equipment temperature rise monitoring device, it comprises input circuit and output circuit; Described input circuit comprises current foldback circuit and filtering accumulator; Described current foldback circuit is connected with connection-peg J2, and connects external power source by connection-peg J2; Described output circuit comprises reduction voltage circuit, filter circuit of pressure-stabilizing and feedback resistance R4～R6, energy storage inductor L2; Described feedback resistance R4～R6, energy storage inductor L2 are connected between described reduction voltage circuit, filter circuit of pressure-stabilizing.
Described current foldback circuit comprises resettable fuse PTC2 and TVS pipe D3; One end of described resettable fuse PTC2 is connected with a terminal of described connection-peg J2, the other end of described resettable fuse PTC2 is connected with the negative pole of described TVS pipe D3, and the described TVS pipe positive pole of D3 and another terminal of described connection-peg J2 are connected.
Described filtering accumulator comprises alminium electrolytic condenser C7～C8, inductance L 1, nonpolarity ceramic disc capacitor C9～C10; The positive pole of described alminium electrolytic condenser C7 is connected with one end of inductance L 1, and the other end of alminium electrolytic condenser C7 is connected and ground connection with the positive pole of described TVS pipe D3; One end after being connected in parallel between two between described alminium electrolytic condenser C8, nonpolarity ceramic disc capacitor C9, C10 is connected with the other end of described inductance L 1, is also connected with the reduction voltage circuit of described output circuit simultaneously; Other end ground connection after being connected in parallel between two between described alminium electrolytic condenser C8, nonpolarity ceramic disc capacitor C9, C10.
Described reduction voltage circuit comprises supply convertor U2, bootstrap capacitor C6 and Schottky diode D4; Described supply convertor U2 is connected with the filtering accumulator of described input circuit; Described Schottky diode D4 is connected with described supply convertor U2 by described bootstrap capacitor C6;
Described filter circuit of pressure-stabilizing comprises alminium electrolytic condenser C11, C12 and nonpolarity ceramic disc capacitor C13; One end between described alminium electrolytic condenser C11, C12 and nonpolarity ceramic disc capacitor C13 after parallel connection is between two connected with described supply convertor U2 by energy storage inductor L2, the other end between described alminium electrolytic condenser C11, C12 and nonpolarity ceramic disc capacitor C13 after parallel connection is between two connected with one end of feedback resistance R4, and the other end of described feedback resistance R4 is connected with described supply convertor U2 with feedback resistance R5 by feedback resistance R6 successively.
Referring to Fig. 1, the power circuit of distribution net equipment temperature rise monitoring device of the present utility model is made up of input circuit and output circuit.Input circuit comprises current foldback circuit and filtering accumulator; Output circuit comprises DC/DC supply convertor U2, feedback resistance and filter regulator circuit.
Described current foldback circuit is made up of resettable fuse PTC2 and TVS pipe D3-SMCJ40A; The backward end of D3 is connected with one end of PTC2, and PTC2 can effectively prevent that electric current is excessive, allow the overcurrent that passes through larger, but the reaction time of PTC2 is ms level, and the response time is slightly long.TVS (Transient Voltage Suppressor; Transient Voltage Suppressor) pipe D3 has over-voltage over-current protection function, and the response time be only ns level, still allows the electric current passing through not as good as PTC2; both can seamlessly combine, and can prevent reliably the fault such as overload and short circuit of circuit.
Filtering accumulator is by alminium electrolytic condenser C7, inductance L 1, alminium electrolytic condenser C8, nonpolarity ceramic disc capacitor C9, C10 composition.Due to the characteristic of power supply unit, before supply convertor, adopting large capacity alminium electrolytic condenser C7 and C8 is storage capacitor, can greatly improve the stability of supply convertor.Because power supply unit input stage is longer by circuit, the ripple of input voltage is also larger, so must adopt nonpolarity ceramic disc capacitor C9, C10 to carry out filter design.C9 is that 100nf can filter low-frequency ripple, and C10 is that 10nf can filter high frequency ripple.
Referring to Fig. 1, described input circuit comprises the part such as protective circuit and filtering accumulator.Described power interface J2-2 (terminal 2 on J2) input DC12V connects PTC2 one end, the backward end that the PTC2 other end connects D3 connects capacitor C 7 positive poles simultaneously, J2-1 (terminal 1 on J2), D3 forward end are connected with power supply unit power supply GND with C7 negative pole, L1 connects DC-12V, the L1 other end connects the positive pole of storage capacitor C8, and C8 negative pole is connected GND with one end of filter capacitor C9, C10.Its other end connects the VIN pin of supply convertor U2, makes input power be stabilized in reliably 12V input.
Output circuit is made up of reduction voltage circuit and filter circuit of pressure-stabilizing.Supply convertor U2 has good linearity and load regulation characteristic.Obtain higher efficiency by the N-channel MOS FET (metal oxide semiconductor field effect tube) that uses a low on-resistance.Application is used Schottky backflow diode, the application for U2 in high input voltage and low output voltage occasion, and the reverse recovery characteristic of Schottky diode D4 near ideal and low forward voltage drop are particularly important diode characteristics.Its reverse recovery characteristic has determined in each cycle the duration of current surge in the time of N-channel MOS FET (metal oxide semiconductor field effect tube) conducting.In the time using D4, corresponding switching loss can reduce greatly.
Bootstrap capacitor C6 in reduction voltage circuit between the BOOT of U2 and SW pin provides the conducting U2 grid current of inner N-channel MOS FET.Should be as 10nF of this electric capacity, and should select the ceramic condenser of high-quality, low ESR.Can extend for small resistor of bootstrap capacitor series connection the conducting transit time of inner N-channel MOS FET.Can use the resistance of 10 to 50 Ω to extend transit time.This contributes to reduce the electromagnetic interference of switch type power supply circuits.
Filter circuit of pressure-stabilizing is made up of alminium electrolytic condenser C11, C12 and non-polar C13.The C11 of 470uf and C12 be switching noise and the low-frequency ripple of filter out power effectively.Non-polar C13 is 100nf, can effectively filtering high frequency ripple, and three's better effects if arranged side by side.
Referring to Fig. 1, bootstrap capacitor C6 connects energy storage inductor L2 one end and Schottky diode D4 end of oppisite phase, D4 forward termination GND, and the L2 other end connects filtering C11, C12 and C13 one end, another termination GND, 4 pin, 8 pin of feedback resistance R4, R5, R6 connection and U2 also meet GND.This power circuit is VCC5 by DC converting by DC12V Efficient Conversion, its efficiency is more promoted to 90% left and right by Schottky diode D4, and its consumed power is reduced in a large number, experimental results show that, when loading under similarity condition as Fig. 1, input voltage 12V, input current 228.5mA, output voltage is 5V, output current 500mA, consume power consumption 0.25W, efficiency 91.16%, with Fig. 1 circuit comparison raising efficiency be 49.49%.And by prime accumulator, instantaneous power providing capability is strengthened, significantly increase the reliability of circuit.
Although the utility model is illustrated hereinbefore according to preferred embodiment, this does not represent that scope of the present utility model is confined to above-mentioned structure, as long as the structure being covered by the utility model claim is all within protection range.Those skilled in the art are reading the equivalent substitution structure that can develop easily after above-mentioned explanation, and equalization variation and the modification under the spirit that does not depart from the utility model and scope, done, within all should being covered by the utility model protection range.
Claims (5)
1. the power circuit of distribution net equipment temperature rise monitoring device, is characterized in that, comprises input circuit and output circuit; Described input circuit comprises current foldback circuit and filtering accumulator; Described current foldback circuit is connected with connection-peg J2, and connects external power source by connection-peg J2; Described output circuit comprises reduction voltage circuit, filter circuit of pressure-stabilizing and feedback resistance R4～R6, energy storage inductor L2; Described feedback resistance R4～R6, energy storage inductor L2 are connected between described reduction voltage circuit, filter circuit of pressure-stabilizing.
2. the power circuit of distribution net equipment temperature rise monitoring device according to claim 1, is characterized in that, described current foldback circuit comprises resettable fuse PTC2 and TVS pipe D3; One end of described resettable fuse PTC2 is connected with a terminal of described connection-peg J2, the other end of described resettable fuse PTC2 is connected with the negative pole of described TVS pipe D3, and the described TVS pipe positive pole of D3 and another terminal of described connection-peg J2 are connected.
3. the power circuit of distribution net equipment temperature rise monitoring device according to claim 1, is characterized in that, described filtering accumulator comprises alminium electrolytic condenser C7～C8, inductance L 1, nonpolarity ceramic disc capacitor C9～C10; The positive pole of described alminium electrolytic condenser C7 is connected with one end of inductance L 1, and the other end of alminium electrolytic condenser C7 is connected and ground connection with the positive pole of described TVS pipe D3; One end after being connected in parallel between two between described alminium electrolytic condenser C8, nonpolarity ceramic disc capacitor C9, C10 is connected with the other end of described inductance L 1, is also connected with the reduction voltage circuit of described output circuit simultaneously; Other end ground connection after being connected in parallel between two between described alminium electrolytic condenser C8, nonpolarity ceramic disc capacitor C9, C10.
4. the power circuit of distribution net equipment temperature rise monitoring device according to claim 1, is characterized in that, described reduction voltage circuit comprises supply convertor U2, bootstrap capacitor C6 and Schottky diode D4; Described supply convertor U2 is connected with the filtering accumulator of described input circuit; Described Schottky diode D4 is connected with described supply convertor U2 by described bootstrap capacitor C6.
5. the power circuit of distribution net equipment temperature rise monitoring device according to claim 1, is characterized in that, described filter circuit of pressure-stabilizing comprises alminium electrolytic condenser C11, C12 and nonpolarity ceramic disc capacitor C13; One end between described alminium electrolytic condenser C11, C12 and nonpolarity ceramic disc capacitor C13 after parallel connection is between two connected with described supply convertor U2 by energy storage inductor L2, the other end between described alminium electrolytic condenser C11, C12 and nonpolarity ceramic disc capacitor C13 after parallel connection is between two connected with one end of feedback resistance R4, and the other end of described feedback resistance R4 is connected with described supply convertor U2 with feedback resistance R5 by feedback resistance R6 successively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420279533.3U CN203840201U (en) | 2014-05-28 | 2014-05-28 | Power supply circuit for network distribution equipment temperature rise monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420279533.3U CN203840201U (en) | 2014-05-28 | 2014-05-28 | Power supply circuit for network distribution equipment temperature rise monitoring device |
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| CN203840201U true CN203840201U (en) | 2014-09-17 |
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| CN201420279533.3U Expired - Fee Related CN203840201U (en) | 2014-05-28 | 2014-05-28 | Power supply circuit for network distribution equipment temperature rise monitoring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103997203A (en) * | 2014-05-28 | 2014-08-20 | 国家电网公司 | Power circuit of electric distribution device temperature rise monitoring device |
| CN109617006A (en) * | 2019-02-21 | 2019-04-12 | 奥克斯空调股份有限公司 | A kind of power supply circuit, device and air conditioner |
| CN113933738A (en) * | 2021-09-08 | 2022-01-14 | 国网甘肃省电力公司电力科学研究院 | Monitoring method and device for switching power supply |
-
2014
- 2014-05-28 CN CN201420279533.3U patent/CN203840201U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103997203A (en) * | 2014-05-28 | 2014-08-20 | 国家电网公司 | Power circuit of electric distribution device temperature rise monitoring device |
| CN103997203B (en) * | 2014-05-28 | 2017-03-15 | 国家电网公司 | The power circuit of distribution net equipment temperature rise monitoring device |
| CN109617006A (en) * | 2019-02-21 | 2019-04-12 | 奥克斯空调股份有限公司 | A kind of power supply circuit, device and air conditioner |
| CN113933738A (en) * | 2021-09-08 | 2022-01-14 | 国网甘肃省电力公司电力科学研究院 | Monitoring method and device for switching power supply |
| CN113933738B (en) * | 2021-09-08 | 2024-04-16 | 国网甘肃省电力公司电力科学研究院 | Monitoring method and device for switching power supply |
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Granted publication date: 20140917 Termination date: 20190528 |