CN204334321U - A kind of confession electrical delay circuit of intrinsically safe power supply - Google Patents
A kind of confession electrical delay circuit of intrinsically safe power supply Download PDFInfo
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- CN204334321U CN204334321U CN201420838412.8U CN201420838412U CN204334321U CN 204334321 U CN204334321 U CN 204334321U CN 201420838412 U CN201420838412 U CN 201420838412U CN 204334321 U CN204334321 U CN 204334321U
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- resistance
- intrinsic safety
- voltage stabilizer
- triode
- adjustable voltage
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Abstract
What the utility model discloses a kind of intrinsically safe power supply supplies electrical delay circuit, comprising: adjustable voltage stabilizer, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first triode, the first electric capacity and the first diode.The conducting that the utility model utilizes the charge characteristic of electric capacity to control triode turns off, and then control the adjustable terminal voltage of adjustable voltage stabilizer, and then control size and the time of adjustable voltage stabilizer output voltage, adjustable voltage stabilizer output voltage is powered to operational amplifier in the intrinsically safe circuit of intrinsic safety electric source simultaneously, thus realize the supply power voltage postponing operational amplifier, intrinsic safety electric source can either be allowed to provide transient high-current when starting, intrinsic safety electric source maximum output current is limited rapidly when can normally work upon actuation again, so just meet intrinsic safety electric equipment both by spark test, again can the requirement of load with having capacitive characteristics.Further, this circuit has that structure is simple, reliability is high, the feature of stable performance.
Description
Technical field
The utility model relates to electronic circuit technology field, particularly relates to a kind of confession electrical delay circuit being applicable to being used on mining intrinsic safety electro source.
Background technology
At present, China's ex electrical product more and more adopts essential safe type (abbreviation intrinsic safety) electric equipment, and for intrinsic safety electric equipment, require at the specified experimental conditions, the spark that its circuit comprised produces can not light the explosive gas mixture of regulation.Power unit is as the energy core of whole intrinsic safety electric equipment, it is again the root that equipment produces electric spark simultaneously, therefore the intrinsic safety electric source that intrinsic safety electric equipment uses limits output current as much as possible to limit the electric current in sparkover, to reach best spark-extinguishing effect, and the scheme of intrinsic safety electric source restriction output current is all limit output current to be no more than specified load current.But the load of some intrinsic safety electric equipment has capacitive characteristics now, as the telephone set of communication, these load request intrinsic safety electric sources with capacitive characteristics can provide the electric current larger than rated current instantaneous, and this and traditional intrinsic safety electric source limit maximum output current and be no more than nominal load current and contradict.
Utility model content
For above-mentioned technical problem, the purpose of this utility model is the confession electrical delay circuit providing a kind of intrinsic safety electric source, the supply power voltage of operational amplifier in the intrinsically safe circuit of this circuit delay intrinsic safety electric source, make intrinsically safe circuit inoperative when intrinsic safety electric source starts, when normally working after power initiation, intrinsically safe circuit recovers normal.Intrinsic safety electric source can either be allowed to provide transient high-current when starting, intrinsic safety electric source maximum output current is limited rapidly when can normally work upon actuation again, so just meet intrinsic safety electric equipment both by spark test, again can the requirement of load with having capacitive characteristics.
For reaching this object, the utility model by the following technical solutions:
A kind of confession electrical delay circuit of intrinsic safety electric source, it is characterized in that, comprise: adjustable voltage stabilizer, first resistance, second resistance, 3rd resistance, 4th resistance, first triode, first electric capacity and the first diode, wherein, the voltage input end of adjustable voltage stabilizer is connected with the positive pole of external power supply, the positive supply pin of operational amplifier in the intrinsically safe circuit of the external intrinsic safety electric source of voltage output end of adjustable voltage stabilizer, the adjustment end of adjustable voltage stabilizer is connected rear ground connection with the first resistance, second resistance is connected between adjustable voltage stabilizer adjustment end and voltage output end, the collector electrode of the first triode connects the adjustment end of adjustable voltage stabilizer, the grounded emitter of the first triode, the base stage of the first triode is through the 4th grounding through resistance, be connected between the base stage of the first triode and adjustable voltage stabilizer voltage output end after 3rd resistance and the first capacitances in series, between the common port that first diode is connected to the first electric capacity and the 3rd resistance and ground.
Especially, the confession electrical delay circuit of described intrinsic safety electric source, is characterized in that, described first triode adopts NPN triode.
The confession electrical delay circuit of the intrinsic safety electric source that the utility model proposes, the conducting that this circuit utilizes the charge characteristic of electric capacity to control triode turns off, and then control the adjustable terminal voltage of adjustable voltage stabilizer, and then control size and the time of adjustable voltage stabilizer output voltage, adjustable voltage stabilizer output voltage is powered to operational amplifier in the intrinsically safe circuit of intrinsic safety electric source simultaneously, thus realize the supply power voltage postponing operational amplifier, thus make intrinsically safe circuit inoperative when intrinsic safety electric source starts, when normally working after power initiation, intrinsically safe circuit recovers normal.Intrinsic safety electric source can either be allowed to provide transient high-current when starting, intrinsic safety electric source maximum output current is limited rapidly when can normally work upon actuation again, so just meet intrinsic safety electric equipment both by spark test, again can the requirement of load with having capacitive characteristics.Further, this circuit has that structure is simple, reliability is high, the feature of stable performance.
Accompanying drawing explanation
Fig. 1 is the intrinsically safe circuit structure chart of the intrinsic safety electric source that the utility model embodiment provides;
Fig. 2 is the confession electrical delay circuit structure chart of the intrinsic safety electric source that the utility model embodiment provides.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.Be understandable that, specific embodiment described herein only for explaining the utility model, but not to restriction of the present utility model.It also should be noted that, for convenience of description, the part relevant to the utility model is illustrate only but not full content in accompanying drawing, unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model understand usually.The object of the term used in specification of the present utility model herein just in order to describe specific embodiment, is not intended to be restriction the utility model.Term as used herein " and/or " comprise arbitrary and all combinations of one or more relevant Listed Items.
As shown in Figure 1, Fig. 1 is the intrinsically safe circuit structure chart of the intrinsic safety electric source that the utility model embodiment provides.In the present embodiment, the intrinsically safe circuit principle of intrinsic safety electric source utilizes the characteristic of operational amplifier A 2 to limit the output current of intrinsic safety electric source, and the maximum output current value of restriction is usually exactly load current value.But, when intrinsic safety electric source band capacitive load, because capacitive load requires that intrinsic safety electric source can provide the electric current larger than rated current instantaneous, it is that load current value contradicts that this and the intrinsically safe circuit of intrinsic safety electric source limit maximum output current value, therefore intrinsic safety electric source instantaneous starting there will be abnormal phenomenon.
For solving the problem, concrete way is as follows:
As shown in Figure 2, Fig. 2 is the power supply delay circuit structure chart of the intrinsic safety electric source that the utility model embodiment provides.This circuit specifically comprises: adjustable voltage stabilizer A1, first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, first triode Q1, first electric capacity C1 and the first diode D1, wherein, the voltage input end of adjustable voltage stabilizer A1 is connected with the positive pole of external power supply, the positive supply pin of operational amplifier A 2 in the intrinsically safe circuit of the external intrinsic safety electric source of voltage output end of adjustable voltage stabilizer A1, the adjustment end of adjustable voltage stabilizer A1 is connected rear ground connection with the first resistance R1, second resistance R2 is connected to adjustable voltage stabilizer A1 and adjusts between end and voltage output end, first triode Q1 collector electrode connects the adjustment end of adjustable voltage stabilizer A1, the grounded emitter of the first triode Q1, the base stage of the first triode Q1 is through the 4th resistance R4 ground connection, 3rd resistance R3 and the first electric capacity C1 is connected between the base stage of the first triode Q1 and adjustable voltage stabilizer A1 voltage output end after connecting, between the common port that first diode D1 is connected to the first electric capacity C1 and the 3rd resistance R3 and ground.
In the present embodiment, described first triode Q1 adopts NPN triode.
The course of work of the power supply delay circuit of described intrinsic safety electric source is: external power supply is to the voltage input end input direct voltage of adjustable voltage stabilizer A1, then the output output voltage of adjustable voltage stabilizer A1 rises, it has just started to rise just by the 3rd resistance R3, 4th resistance R4 charges to the first electric capacity C1, first triode Q1 conducting simultaneously, first triode Q1 collector potential is dragged down, collector electrode due to the first triode Q1 connects the adjustment end of adjustable voltage stabilizer A1, therefore the adjustment terminal potential of adjustable voltage stabilizer A1 is dragged down, then adjustable voltage stabilizer A1 output voltage is lower, and the positive supply pin of operational amplifier A 2 in the intrinsically safe circuit of the external intrinsic safety electric source of the voltage output end of adjustable voltage stabilizer A1, adjustable voltage stabilizer A1 output voltage is powered to operational amplifier A 2, so just cause operational amplifier A 2 cisco unity malfunction, the intrinsically safe circuit of intrinsic safety electric source is inoperative.When the first electric capacity C1 is full of, the base voltage of the first triode Q1 disappears, first triode Q1 turns off, the voltage output end of adjustable voltage stabilizer A1 obtains the output voltage set by sampling resistor R1, R2, the voltage of setting is exported to the operational amplifier A 2 in the intrinsically safe circuit of intrinsic safety electric source, then operational amplifier A 2 normally works, and the intrinsically safe circuit of intrinsic safety electric source works.When the power supply delay circuit power-off of intrinsic safety electric source, the first electric capacity C1 is discharged by the first diode D1, and like this when the power supply delay circuit of intrinsic safety electric source powers on again, the first electric capacity C1 again can charge and start working.
It should be noted that, the start-up time required for different intrinsic safety electric sources is different, and the 3rd resistance R3, the 4th resistance R4 are different with the specification that the first electric capacity C1 selects, and ensures that the time of time and intrinsic safety electric source startup needs that the first electric capacity C1 is full of electricity matches.
The technical solution of the utility model can either allow intrinsic safety electric source provide transient high-current when starting, intrinsic safety electric source maximum output current is limited rapidly when can normally work upon actuation again, so just meet intrinsic safety electric equipment both by spark test, again can the requirement of load with having capacitive characteristics.Further, this circuit has that structure is simple, reliability is high, the feature of stable performance.
Note, above are only preferred embodiment of the present utility model and institute's application technology principle.Skilled person in the art will appreciate that the utility model is not limited to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and protection range of the present utility model can not be departed from.Therefore, although be described in further detail the utility model by above embodiment, but the utility model is not limited only to above embodiment, when not departing from the utility model design, can also comprise other Equivalent embodiments more, and scope of the present utility model is determined by appended right.
Claims (2)
1. the confession electrical delay circuit of an intrinsically safe power supply, it is characterized in that, comprise: adjustable voltage stabilizer, first resistance, second resistance, 3rd resistance, 4th resistance, first triode, first electric capacity and the first diode, wherein, the voltage input end of adjustable voltage stabilizer is connected with the positive pole of external power supply, the positive supply pin of operational amplifier in the intrinsically safe circuit of the external intrinsically safe power supply of voltage output end of adjustable voltage stabilizer, the adjustment end of adjustable voltage stabilizer is connected rear ground connection with the first resistance, second resistance is connected between adjustable voltage stabilizer adjustment end and voltage output end, the collector electrode of the first triode connects the adjustment end of adjustable voltage stabilizer, the grounded emitter of the first triode, the base stage of the first triode is through the 4th grounding through resistance, be connected between the base stage of the first triode and adjustable voltage stabilizer voltage output end after 3rd resistance and the first capacitances in series, between the common port that first diode is connected to the first electric capacity and the 3rd resistance and ground.
2. the confession electrical delay circuit of intrinsically safe power supply according to claim 1, is characterized in that, described first triode adopts NPN triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420838412.8U CN204334321U (en) | 2014-12-25 | 2014-12-25 | A kind of confession electrical delay circuit of intrinsically safe power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420838412.8U CN204334321U (en) | 2014-12-25 | 2014-12-25 | A kind of confession electrical delay circuit of intrinsically safe power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204334321U true CN204334321U (en) | 2015-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420838412.8U Expired - Fee Related CN204334321U (en) | 2014-12-25 | 2014-12-25 | A kind of confession electrical delay circuit of intrinsically safe power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204334321U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051632A (en) * | 2017-12-19 | 2018-05-18 | 西安安森智能仪器股份有限公司 | A kind of method of transmitter load supplying and two-wire system 4-20mA transmitter circuits |
-
2014
- 2014-12-25 CN CN201420838412.8U patent/CN204334321U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051632A (en) * | 2017-12-19 | 2018-05-18 | 西安安森智能仪器股份有限公司 | A kind of method of transmitter load supplying and two-wire system 4-20mA transmitter circuits |
| CN108051632B (en) * | 2017-12-19 | 2023-06-06 | 西安安森智能仪器股份有限公司 | Method for supplying power to load of transmitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20211225 |
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| CF01 | Termination of patent right due to non-payment of annual fee |