CN203747501U - Mine intrinsically-safe direct current uninterruptible power source - Google Patents
Mine intrinsically-safe direct current uninterruptible power source Download PDFInfo
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- CN203747501U CN203747501U CN201420128364.3U CN201420128364U CN203747501U CN 203747501 U CN203747501 U CN 203747501U CN 201420128364 U CN201420128364 U CN 201420128364U CN 203747501 U CN203747501 U CN 203747501U
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Abstract
The utility model relates to a power source circuit, in particular, a mine intrinsically-safe direct current uninterruptible power source device. The mine intrinsically-safe direct current uninterruptible power source includes a voltage reduction and isolation transformer, rectification and filtering circuits, a voltage stabilizing circuit and an intrinsically-safe output module; two paths of conversion output which are led out from the voltage reduction and isolation transformer are respectively connected into two paths of rectification and filtering circuits; the output of one path of rectification and filtering circuit is connected with a direct current-direct current conversion output circuit; the output of the other path of the rectification and filtering circuit is connected with the voltage stabilizing circuit; the output of the voltage stabilizing circuit is connected with a storage battery; a switching circuit is connected with the direct current-direct current conversion output circuit and the storage battery; the direct current-direct current conversion output circuit and the storage battery are connected with the intrinsically-safe output module through the switching circuit and a protection circuit. According to the mine intrinsically-safe direct current uninterruptible power source of the utility model, when an external-connection power source supplies power, a standby power source is in a floating charging state; when the external-connection power source is switched off, the standby power source automatically operates, and therefore, overcharge and over-discharge of the battery can be prevented.
Description
Technical field
The utility model relates to a kind of power circuit, particularly relates to a kind of Mine-used I. S DC UPS device.
Background technology
Down-hole operational environment is special, is prone to accidents, and causes Alternating Current Power Supply to interrupt.For accident being rushed to repair to processing, many transducers and communication apparatus must work on after grid power failure.Therefore, intrinsic safety electric source must have reserve battery, to continued to power to the load by reserve battery when grid power blackout.In addition, mine intrinsic safety DC UPS (abbreviation intrinsic safety electric source) requires in working temperature at-10～+ 40 ℃, in the time of relative humidity≤95%(25 ℃), there are methane or coal-dust explosion mixture, etc. can normally work safely under condition.In addition, according to the output voltage of stipulating in GB GB3836.4-2010 or electric current, can not light imflammable gas around, between intrinsically safe circuit and immaterial safety circuit, must have reliable electrical isolation, to meet the requirement for height of mine work to power supply.
Summary of the invention
The utility model is not enough for prior art, has proposed a kind of simple in structure, volume is little, cost is low Mine-used I. S DC UPS.Easy for installation, practical.
The technical scheme that the utility model adopts:
A kind of Mine-used I. S DC UPS, comprise step-down isolation transformer, current rectifying and wave filtering circuit, voltage stabilizing circuit, intrinsic safety output module, from described step-down isolation transformer, draw two-way conversion output and access respectively two-way current rectifying and wave filtering circuit, wherein a road current rectifying and wave filtering circuit output connects DC-DC direct current conversion output circuit, another road current rectifying and wave filtering circuit output connects voltage stabilizing circuit, and described voltage stabilizing circuit output connects storage battery; Be connected with commutation circuit with described DC-DC direct current conversion output circuit and storage battery; Described DC-DC direct current conversion output circuit and storage battery connect intrinsic safety output module by described commutation circuit and protective circuit.
Described DC-DC direct current conversion output circuit adopts voltage-dropping type DC/DC transducer XL2576, the positive and negative electrode of current rectifying and wave filtering circuit output connects respectively 1 pin and 3 pin of DC/DC transducer XL2576, between 2 pin of DC/DC transducer XL2576 and 4 pin, connect adjustable resistance, between 2 pin of DC/DC transducer XL2576 and power cathode, be connected voltage stabilizing didoe, 5 pin of DC/DC transducer XL2576 connect change over switch, and DC/DC transducer XL2576 exports direct current powering load after realizing DC-DC conversion.
Described voltage stabilizing circuit adopts the adjustable voltage-stabiliser tube LM317T formation of three ends charging circuit to charge to Ni-MH battery; The adjustable voltage-stabiliser tube LM317T of described three end input connects rectification filter circuit output end, and the adjustable voltage-stabiliser tube LM317T of three ends output connects storage battery.
Described protective circuit comprises over-and under-voltage protective circuit and current foldback circuit, described over-and under-voltage protective circuit comprises overvoltage and the under-voltage comparison circuit of two groups of parallel connections, the output of DC/DC transducer XL2576 accesses respectively overvoltage and under-voltage comparator through sample circuit, described two comparator output terminals connect transistor switch, and described transistor switch connects 5 pin of DC/DC transducer XL2576; Described current foldback circuit comprises current transformer, sample circuit, reference pressure stabilization power and comparator; reference pressure stabilization power provides reference voltage and power supply for comparator; sample circuit output connects comparator input terminal, and described comparator output terminal connects 5 pin of DC/DC transducer XL2576.
Described commutation circuit comprises normally opened relay K1, normally closed relay K2, triode Q4; The adjustable voltage-stabiliser tube LM317T of three ends output is connected with normally opened relay K1, normally closed relay K2 by diode D8, normally opened relay K1 controls the charging of storage battery, the controlled triode Q4 that is connected in of normally opened relay K1, triode Q4 controls the sample circuit that base stage connects circuit output end of pressure-stabilizing, normally closed relay K2 closure when civil power breaks down, realization is load supplying by storage battery, realizes conversion.
The beneficial effects of the utility model:
1, the utility model mine intrinsic safety DC UPS, when external Power supply, stand-by power supply is in floating charge state, and has the defencive function that prevents over-charging of battery; During external power supply power-off, stand-by power supply puts into operation automatically, and prevents over-charging of battery, Cross prevention measure.Can be used for needing high-risk environment and the energy-conserving and environment-protective Workplace such as colliery, chemical industry, oil of intrinsic safety type D.C. regulated power supply.
2, the utility model intrinsic safety type DC UPS, can realize DC voltage-stabilizing output, also carries out over-and under-voltage protection simultaneously, utilizes relay to realize the quick switching of circuit.Have circuit simple, conversion efficiency is high, uninterrupted power supply, low cost and other advantages.This intrinsic safety electric source supply power voltage is 220V, allowable fluctuation range 80%-110%; Output voltage is 18V; Operating current=<800mA, its value can regulate according to corresponding loading demand.
3, the utility model mine intrinsic safety DC UPS, employing overcharges, over circuit is protected fully to accumulator charging/discharging process, has met the requirement for height of mine work to power supply.Adopt voltage-dropping type DC/DC transducer XL2576, the adjustable voltage-stabiliser tube LM317T of three ends and LM339 to realize the management to uninterrupted power supply, when Alternating Current Power Supply is normal, by ac power supply system, powered; When alternating current breaks down, by storage battery, provide power supply, met the requirement of mining uninterrupted power supply.
4, the utility model mine intrinsic safety DC UPS; this device utilizes the circuit such as over-and under-voltage, overcurrent, short-circuit protection and charge in batteries management; met the requirement for height of mine work to power supply; and it also have volume little, the series of advantages such as simple, cost is lower are installed, practical application is strong.
Accompanying drawing explanation
Fig. 1 is the theory of constitution block diagram of the utility model D.C. regulated power supply;
Fig. 2 is the utility model D.C. regulated power supply DC-DC direct current conversion output circuit;
Fig. 3 is the utility model D.C. regulated power supply over-and under-voltage protective circuit;
Fig. 4 is the utility model D.C. regulated power supply current foldback circuit;
Fig. 5 is the charging of the utility model D.C. regulated power supply and commutation circuit.
Embodiment
Below by embodiment, the technical solution of the utility model is described in further detail.
Embodiment 1
Referring to Fig. 1, the utility model Mine-used I. S DC UPS, comprise step-down isolation transformer, current rectifying and wave filtering circuit, voltage stabilizing circuit, intrinsic safety output module, from described step-down isolation transformer, draw two-way conversion output and access respectively two-way current rectifying and wave filtering circuit, wherein a road current rectifying and wave filtering circuit output connects DC-DC direct current conversion output circuit, another road current rectifying and wave filtering circuit output connects voltage stabilizing circuit, and described voltage stabilizing circuit output connects storage battery; Be connected with commutation circuit with described DC-DC direct current conversion output circuit and storage battery; Described DC-DC direct current conversion output circuit and storage battery connect intrinsic safety output module by described commutation circuit and protective circuit.
Embodiment 2
Referring to Fig. 1, Fig. 2, the Mine-used I. S DC UPS of the present embodiment, as different from Example 1, further: described DC-DC direct current conversion output circuit adopts voltage-dropping type DC/DC transducer XL2576, current rectifying and wave filtering circuit output just, negative pole connects respectively 1 pin and 3 pin of DC/DC transducer XL2576, between 2 pin of DC/DC transducer XL2576 and 4 pin, connect adjustable resistance, between 2 pin of DC/DC transducer XL2576 and power cathode, be connected voltage stabilizing didoe, 5 pin of DC/DC transducer XL2576 connect change over switch, DC/DC transducer XL2576 exports direct current powering load after realizing DC-DC conversion.
As shown in Figure 2, DC-DC direct current conversion output circuit adopts voltage-dropping type DC/DC transducer XL2576.XL2576 is a 52KHz fixed frequency pulse width modulated DC-DC direct current transducer; control circuit for pulse-width modulation can linear regulation duty ratio from 0 to 100%, low ripple, built-in overcurrent and short-circuit protection function; when there is overcurrent and short-circuit protection, XL2576 operating frequency drops to 31KHz from 52KHz.Built-in frequency compensation, softly open, hot shutoff, current limliting and short-circuit protection function.The output voltage range of XL2576 be 1.23V to 38V, load current is 3A to the maximum.Alternating current entered after step-down, rectification filtering high order harmonic component, the input pin of access voltage-dropping type DC/DC transducer XL2576, and the input voltage range of XL2576 is at 3.6V to 40V, and external bypass electric capacity is eliminated input noise to ground.2 pin by XL2576 are exported, and 3 pin are grounding pin, and this pin must be placed on Xiao Jite diode and output capacitance to the outside on ground, stops the switching current burr that inductive drop noise causes to be input to XL2576.By the precision of fixed resistance R2 and an adjustable potentiometer R1 raising regulation output voltage.
Embodiment 3
Referring to Fig. 1, Fig. 2, the Mine-used I. S DC UPS of the present embodiment, as different from Example 2, further: described voltage stabilizing circuit adopts the adjustable voltage-stabiliser tube LM317T formation of three ends charging circuit to charge to Ni-MH battery; The adjustable voltage-stabiliser tube LM317T of described three end input connects rectification filter circuit output end, and the adjustable voltage-stabiliser tube LM317T of three ends output connects storage battery.
The utility model Mine-used I. S DC UPS, when mining AC-powered, the alternating current of 220V is after isolating transformer conversion output,, after rectification, filtering, charges to Ni-MH battery by take the charging circuit that the adjustable voltage-stabiliser tube LM317T of three ends is core in a road; Direct current powering load, after rectification, filtering, is exported in another road after XL2576 realizes DC-DC conversion.When mining alternating current power-off, there is the diverter switch of commutation circuit to automatically switch, by the Ni-MH battery powering load of 24V.
As shown in Figure 1, the interchange of power supply network must be through transformer pressure-reducing, at transformer secondary output 18V and 24V two-way alternating current, charging and commutation circuit that the pulsating voltage of rectifier bridge output is respectively rear class DC-DC direct current conversion output and voltage-stabiliser tube LM317T control after electrochemical capacitor filtering provide power supply.Owing to being the intrinsic safety type electric equipment of mains supply under coal mine, step-down transformer adopting used meets the R type isolating transformer of the 6.1st regulation of GB3836.4-83.
Embodiment 4
Referring to Fig. 1～Fig. 4, the Mine-used I. S DC UPS of the present embodiment, different from aforementioned each embodiment is, further: described protective circuit comprises over-and under-voltage protective circuit and current foldback circuit, described over-and under-voltage protective circuit comprises overvoltage and the under-voltage comparison circuit of two groups of parallel connections, the output of DC/DC transducer XL2576 accesses respectively overvoltage and under-voltage comparator through sample circuit, described two comparator output terminals connect transistor switch Q1, and the collector output of described transistor switch Q1 connects 5 pin of DC/DC transducer XL2576; Described current foldback circuit comprises current transformer, sample circuit, reference pressure stabilization power and comparator; reference pressure stabilization power provides reference voltage and power supply for comparator; sample circuit output connects comparator input terminal, and described comparator output terminal connects 5 pin of DC/DC transducer XL2576.
In order to prevent that power supply from occurring that abnormal conditions cause that electric power output voltage is too high or electric current is excessive and occur that paradoxical discharge causes spark ignition imflammable gas; the utility model Mine-used I. S DC UPS; overvoltage protection and overcurrent protection have been designed, as shown in Figure 3.And there is when abnormal protective circuit response rapidly in power supply and precisely.Components and parts R9, capacitor C 3, diode D form delay circuit, and for preventing the moment of power initiation, the too high power supply of surge voltage is not also worked and caused mistake protection, and power supply cannot be started normally.When input voltage Vc is equal with Vb; under-voltage comparator N1 is output as low level; thereby drive signal PWM to be blocked; now triode Q1 becomes cut-off from original conducting; the driving signal that 5 pin of XL2576 are received also changes high level into by low level; so because XL2576 is that low level triggers now XL2576 and quits work, play a protective role, regulate RP5 can regulate the voltage threshold of over-and under-voltage action.When the signal voltage Vc of contrast is between threshold voltage time, window voltage △ V=Vb-Va, this voltage is used for judging that applied signal voltage is whether between threshold voltage.In the design, we Vb is set to 18.5V, and Va is set to 17.5V, so window voltage △ V=Vb-Va=18.5-17.5=1V.So no matter be that overvoltage or under-voltage fault occur; comparator output level is by high step-down; thereby drive signal PWM to be blocked; now triode Q1 becomes cut-off from original conducting; the driving signal that 5 pin of XL2576 are received also changes high level into by low level; so because XL2576 is that low level triggers now XL2576 and quits work, play a protective role.
As shown in Figure 4, adopting current transformer in current foldback circuit, is voltage signal by resistance by the current conversion collecting, and through resistance series connection bleeder circuit, is gathering voltage signal, by signal by LM339 and standard+5V voltage-contrast.Normal voltage is input to the inverting input of comparator, and signal is input to positive input.5 pin of the output termination DC-DC chip XL2576 of comparator.Maximum current is set to 800mA, and when output current reaches 800mA, comparator positive input voltage is+5V, comparator output high level, and 5 pin of XL2576 obtain high level signal, will export cut-off rapidly, play the effect of protection.Error range is 5%.
Embodiment 5
Referring to Fig. 1～Fig. 5, the Mine-used I. S DC UPS of the present embodiment, as different from Example 4, further: described commutation circuit comprises normally opened relay K1, normally closed relay K2, triode Q4; The adjustable voltage-stabiliser tube LM317T of three ends output is connected with normally opened relay K1, normally closed relay K2 by diode D8, normally opened relay K1 controls the charging of storage battery, the controlled triode Q4 that is connected in of normally opened relay K1, triode Q4 controls the sample circuit that base stage connects circuit output end of pressure-stabilizing, normally closed relay K2 is when civil power breaks down, and realizing is load supplying by storage battery.
Charging and commutation circuit are mainly that storage battery is charged, and when civil power quits work, are switched to fast storage battery power supply operating state, stop electric discharge when storage battery over-discharge can, reduce unnecessary loss and harm, and its circuit theory as shown in Figure 5.After the step-down of 220V alternating current, what from bridge rectifier, export is pulsating voltage, need to, by after electrochemical capacitor filtering higher harmonic components, just can access the input of the adjustable voltage-stabiliser tube LM317T of three ends.Its output is by diode D8 and normally opened relay K1, and normally closed relay K2 connects, the charging of normally opened relay K1 control storage battery, and normally closed relay K2 commutation circuit, and by the LED high brightness LED operating state of display power supply intuitively.When civil power is working properly, D6 green LED is bright, triode Q4 conducting, and relay K 2 coils have electric current to flow through, and relay disconnects, and storage battery does not discharge.In K1, have electric current to flow through, relay closes, starts charging.When battery tension reaches 26V after electric resistance partial pressure sample circuit gathers voltage with standard+9V voltage ratio, standard signal connects positive input, comparator output low level when gathering voltage and be greater than 9V, Q4 cut-off, storage battery stops charging.When civil power breaks down, be switched to fast storage battery, due to diode, D8 has unilateral conduction, so triode Q4 cut-off, does not have electric current in relay K 2 coils, normally closed relay is closed, storage battery is started working, and realizes conversion, and now D9 red LED light-emitting diode is bright.Storage battery is connected with 2 pin of DC-DC chip XL2576 by relay, is connected thus with over-and under-voltage, current foldback circuit below.Another road, with LM7809, the 24V voltage of storage battery is converted into 9V reference voltage is provided, by regulating the value of R29, when battery tension is less than 22V, the voltage of R28 is less than 9V, comparator LM339 output low level, triode Q5 cut-off Q4 conducting, storage battery adopts the Ni-MH battery of single-unit 1.2V totally 20 to save, and the minimum discharge voltage of single-unit Ni-MH battery is 1V.Therefore, the minimum discharge voltage of the storage battery of 24V can not, lower than 20V, at this, be set as 22V.
Table 1 is test event and the test result analysis of the utility model Mine-used I. S DC UPS, result show actual emulation experiment value and calculated value basically identical, error is very little, in allowed band, has proved that this circuit design is correct, scientific and reasonable.
Table 1: test event and test result analysis
The utility model adopts voltage-dropping type DC/DC transducer XL2576, the adjustable voltage-stabiliser tube LM317T of three ends and LM339 to realize the management to uninterrupted power supply, when Alternating Current Power Supply is normal, by ac power supply system, is powered; When alternating current breaks down, by storage battery, provide power supply, met the requirement of mining uninterrupted power supply.This device utilizes the circuit such as over-and under-voltage, overcurrent, short-circuit protection and charge in batteries management, has met the requirement for height of mine work to power supply, and it also have volume little, the series of advantages such as simple, cost is lower are installed, practical application is strong.
Claims (5)
1. a Mine-used I. S DC UPS, comprise step-down isolation transformer, current rectifying and wave filtering circuit, voltage stabilizing circuit, intrinsic safety output module, it is characterized in that: from described step-down isolation transformer, draw two-way conversion output and access respectively two-way current rectifying and wave filtering circuit, wherein a road current rectifying and wave filtering circuit output connects DC-DC direct current conversion output circuit, another road current rectifying and wave filtering circuit output connects voltage stabilizing circuit, and described voltage stabilizing circuit output connects storage battery; Be connected with commutation circuit with described DC-DC direct current conversion output circuit and storage battery; Described DC-DC direct current conversion output circuit and storage battery connect intrinsic safety output module by described commutation circuit and protective circuit.
2. Mine-used I. S DC UPS according to claim 1, it is characterized in that: described DC-DC direct current conversion output circuit adopts voltage-dropping type DC/DC transducer XL2576, current rectifying and wave filtering circuit output just, negative pole connects respectively 1 pin and 3 pin of DC/DC transducer XL2576, between 2 pin of DC/DC transducer XL2576 and 4 pin, connect adjustable resistance, between 2 pin of DC/DC transducer XL2576 and power cathode, be connected voltage stabilizing didoe, 5 pin of DC/DC transducer XL2576 connect change over switch, DC/DC transducer XL2576 exports direct current powering load after realizing DC-DC conversion.
3. Mine-used I. S DC UPS according to claim 1 and 2, is characterized in that: described voltage stabilizing circuit adopts the adjustable voltage-stabiliser tube LM317T formation of three ends charging circuit to charge to Ni-MH battery; The adjustable voltage-stabiliser tube LM317T of described three end input connects rectification filter circuit output end, and the adjustable voltage-stabiliser tube LM317T of three ends output connects storage battery.
4. Mine-used I. S DC UPS according to claim 3, it is characterized in that: protective circuit comprises over-and under-voltage protective circuit and current foldback circuit, described over-and under-voltage protective circuit comprises overvoltage and the under-voltage comparison circuit of two groups of parallel connections, the output of DC/DC transducer XL2576 accesses respectively overvoltage and under-voltage comparator through sample circuit, described two comparator output terminals connect transistor switch, and described transistor switch connects 5 pin of DC/DC transducer XL2576; Described current foldback circuit comprises current transformer, sample circuit, reference pressure stabilization power and comparator; reference pressure stabilization power provides reference voltage and power supply for comparator; sample circuit output connects comparator input terminal, and described comparator output terminal connects 5 pin of DC/DC transducer XL2576.
5. Mine-used I. S DC UPS according to claim 4, is characterized in that: described commutation circuit comprises normally opened relay K1, normally closed relay K2, triode Q4; The adjustable voltage-stabiliser tube LM317T of three ends output is connected with normally opened relay K1, normally closed relay K2 by diode D8, normally opened relay K1 controls the charging of storage battery, the controlled triode Q4 that is connected in of normally opened relay K1, triode Q4 controls the sample circuit that base stage connects circuit output end of pressure-stabilizing, normally closed relay K2 closure when civil power breaks down, realizes the conversion that is load supplying by storage battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420128364.3U CN203747501U (en) | 2014-03-21 | 2014-03-21 | Mine intrinsically-safe direct current uninterruptible power source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420128364.3U CN203747501U (en) | 2014-03-21 | 2014-03-21 | Mine intrinsically-safe direct current uninterruptible power source |
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| CN203747501U true CN203747501U (en) | 2014-07-30 |
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| CN201420128364.3U Expired - Fee Related CN203747501U (en) | 2014-03-21 | 2014-03-21 | Mine intrinsically-safe direct current uninterruptible power source |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333121A (en) * | 2014-11-17 | 2015-02-04 | 济南轨道交通装备有限责任公司 | DC continuous power supply system applied to cleaning trolley of subway tunnel |
| CN105071522A (en) * | 2015-08-05 | 2015-11-18 | 北京百度网讯科技有限公司 | High-voltage direct current power supply system and power supply method thereof |
| CN105207350A (en) * | 2015-11-11 | 2015-12-30 | 江苏银佳企业集团有限公司 | Intelligent centralized type emergency power supply |
| CN105208757A (en) * | 2015-11-11 | 2015-12-30 | 江苏银佳企业集团有限公司 | Emergency lighting control system |
| CN107659203A (en) * | 2017-09-28 | 2018-02-02 | 中国矿业大学 | A kind of deep tunnel roof monitoring wireless sensing node based on wind collecting |
| CN108663561A (en) * | 2018-07-12 | 2018-10-16 | 河南森源电气股份有限公司 | A kind of self-powered multifunctional electric meter |
| CN115995875A (en) * | 2023-03-23 | 2023-04-21 | 国网湖北省电力有限公司经济技术研究院 | Energy storage system applied to current transformer electricity taking and control method thereof |
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2014
- 2014-03-21 CN CN201420128364.3U patent/CN203747501U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333121A (en) * | 2014-11-17 | 2015-02-04 | 济南轨道交通装备有限责任公司 | DC continuous power supply system applied to cleaning trolley of subway tunnel |
| CN105071522A (en) * | 2015-08-05 | 2015-11-18 | 北京百度网讯科技有限公司 | High-voltage direct current power supply system and power supply method thereof |
| CN105207350A (en) * | 2015-11-11 | 2015-12-30 | 江苏银佳企业集团有限公司 | Intelligent centralized type emergency power supply |
| CN105208757A (en) * | 2015-11-11 | 2015-12-30 | 江苏银佳企业集团有限公司 | Emergency lighting control system |
| CN107659203A (en) * | 2017-09-28 | 2018-02-02 | 中国矿业大学 | A kind of deep tunnel roof monitoring wireless sensing node based on wind collecting |
| CN108663561A (en) * | 2018-07-12 | 2018-10-16 | 河南森源电气股份有限公司 | A kind of self-powered multifunctional electric meter |
| CN115995875A (en) * | 2023-03-23 | 2023-04-21 | 国网湖北省电力有限公司经济技术研究院 | Energy storage system applied to current transformer electricity taking and control method thereof |
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