CN205544916U - Capacitor discharge circuit and capacitor discharge instrument - Google Patents
Capacitor discharge circuit and capacitor discharge instrument Download PDFInfo
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- CN205544916U CN205544916U CN201620111624.5U CN201620111624U CN205544916U CN 205544916 U CN205544916 U CN 205544916U CN 201620111624 U CN201620111624 U CN 201620111624U CN 205544916 U CN205544916 U CN 205544916U
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- resistance
- binding post
- discharge cell
- discharge
- unit
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Abstract
The utility model discloses a capacitor discharge circuit, including a binding post, the 2nd binding post, discharge cell, electric current adjustment unit and sampling unit, a binding post and the 2nd binding post are used for being connected with the two poles of the earth of the electric capacity of waiting to discharge, the input and a binding post of discharge cell are connected, the output of discharge cell is connected with sampling unit's input, and sampling unit's output and the 2nd binding post are connected, sampling unit's the signal acquisition end of end with electric current adjustment unit that is gathered is connected, electric current adjustment unit's electric current adjusted end and being connected by adjusted end of discharge cell, wherein: the discharge cell is used for release wait the to discharge storage voltage of electric capacity, sampling unit is used for gathering the discharge current of discharge cell, electric current adjustment unit is used for adjusting the electric current of discharge cell to it is invariable to make discharge current. The utility model discloses technical scheme has the characteristics that the commonality is strong. The utility model discloses a capacitor discharge instrument is disclosed simultaneously.
Description
Technical field
This utility model relates to electronic technology field, particularly to a kind of capacitor discharging circuit and electric capacity electric discharge
Instrument.
Background technology
After electronic equipment power-off, the capacitor arranged in it is not because having discharge loop and storage high pressure.When
When this electronic equipment is installed or keeped in repair by people, may be wounded by the high pressure of capacitor storage.
Therefore, capacitor discharging circuit is needed discharging capacitors to be processed, to eliminate electric shock hidden danger.
As it is shown in figure 1, capacitor discharging circuit of the prior art includes discharge resistance, current-limiting resistance and instruction
Diode.Owing to this electric discharge instrument utilizes the operation principle of RC circuit to discharge, if electricity the most to be discharged
The voltage holding storage is the highest, then the velocity of discharge of discharge resistance is quickly, now, needs bigger current-limiting resistance
Discharge current is limited；If the voltage of electric capacity to be discharged storage is relatively low, then the electric discharge speed of discharge resistance
Degree is relatively slow, now, need to reduce the resistance of current-limiting resistance as far as possible.But, due at this electric capacity electric discharge electricity
After road makes molding, the value of discharge resistance therein and current-limiting resistance is the most fixing, it is impossible to follow to be discharged
The reservoir voltage situation of electric capacity makes corresponding adjustment.Therefore, there is poor universality in this capacitor discharging circuit
Defect.
Utility model content
Main purpose of the present utility model is to provide a kind of capacitor discharging circuit, it is intended to strengthen the electric discharge of this electric capacity
The versatility of circuit.
For achieving the above object, the capacitor discharging circuit that the utility model proposes, including the first binding post,
Second binding post, discharge cell, current adjustment unit and sampling unit；Described first binding post and
Second binding post is for being connected with the two poles of the earth of electric capacity to be discharged；The input of described discharge cell is with described
First binding post connects；The outfan of described discharge cell is connected with the input of described sampling unit,
The outfan of described sampling unit is connected with described second binding post；The collected end of described sampling unit
Be connected with the signals collecting end of described current adjustment unit, the electric current of described current adjustment unit adjust end with
The end that is adjusted of described discharge cell connects, wherein: described discharge cell, in described first wiring
When terminal and described second binding post are connected with the two poles of the earth of described electric capacity to be discharged, discharge described to be discharged
The storage voltage of electric capacity；Described sampling unit, for gathering the discharge current of described discharge cell；Described
Current adjustment unit, adjusts described electric discharge for the discharge current size collected according to described sampling unit
The electric current of unit, so that described discharge current is constant.
Preferably, described discharge cell includes the first resistance and the second audion；The of described first resistance
One end is connected with described first binding post, the second end of described first resistance and described second audion
Base stage connects；Described first resistance and the quilt that link node is described discharge cell of described second audion
Adjust end, the input of the most described discharge cell of current collection of described second audion, described two or three pole
The outfan of the most described discharge cell of transmitting of pipe.
Preferably, described discharge cell also includes the second resistance；First end of described second resistance is with described
Second end of the first resistance connects, and the second end of described second resistance connects with the base stage of described second audion
Connect；The link node of described second resistance and described second audion be described discharge cell be adjusted end.
Preferably, described current adjustment unit includes the 4th resistance and the first audion；Described 4th resistance
The signals collecting end that the first end is described current adjustment unit, the second end of described 4th resistance is with described
The base stage of the first audion connects, the electricity of the most described current adjustment unit of current collection of described first audion
Stream adjusts end, and the emitter stage of described first audion is connected with described second binding post.
Preferably, described capacitor discharging circuit also includes for indicating described electric capacity discharge condition to be discharged
Display unit；The power input of described display unit is connected with described first binding post, described display
The outfan of unit is connected with the input of described discharge cell.
Preferably, described display unit includes LED.
Preferably, described sampling unit includes that the 3rd resistance, the first end of described 3rd resistance are adopted described in being
The collected end of sample unit and input, the output that the second end is described sampling unit of described 3rd resistance
End.
Preferably, described capacitor discharging circuit also includes rectification unit；First input of described rectification unit
End is connected with described first binding post, the second input of described rectification unit and described second terminals
Son connects, and the cathode output end of described rectification unit is connected with the power input of described display unit, institute
The outfan of the cathode output end and described sampling unit of stating rectification unit is connected.
This utility model also proposes a kind of electric capacity electric discharge instrument, and this electric capacity electric discharge instrument includes as above
Capacitor discharging circuit.
The electric discharge that technical solutions of the utility model gather according to sampling unit by using current adjustment unit
The discharge current of unit adjusts the electric current of discharge cell, so that its constant magnitude.Owing to flowing through described electric discharge
The size of current of unit is constant, therefore, and the electric capacity to be discharged that reservoir voltage is varied in size, this
The capacitor discharging circuit that utility model proposes can be treated discharge capacity steadily, rapidly and discharge, tool
There is the feature of highly versatile.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that,
Accompanying drawing in describing below is only embodiments more of the present utility model, for ordinary skill people
From the point of view of Yuan, on the premise of not paying creative work, it is also possible to obtain according to the structure shown in these accompanying drawings
Obtain other accompanying drawing.
Fig. 1 is the electrical block diagram of capacitor discharging circuit in prior art；
Fig. 2 is the high-level schematic functional block diagram of this utility model capacitor discharging circuit one embodiment；
Fig. 3 is the electrical block diagram of this utility model another embodiment of capacitor discharging circuit.
Drawing reference numeral illustrates:
| Label | Title | Label | Title |
| 10 | Discharge cell | Q1 | First audion |
| 20 | Current adjustment unit | Q2 | Second audion |
| 30 | Sampling unit | R1 | First resistance |
| 40 | Display unit | R2 | Second resistance |
| 50 | Rectification unit | R3 | 3rd resistance |
| P1 | First binding post | R4 | 4th resistance |
| P2 | Second binding post |
The realization of this utility model purpose, functional characteristics and advantage will in conjunction with the embodiments, do referring to the drawings into
One step explanation.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, to the technology in this utility model embodiment
Scheme is clearly and completely described, it is clear that described embodiment is only of the present utility model one
Section Example rather than whole embodiments.Based on the embodiment in this utility model, this area is general
The every other embodiment that logical technical staff is obtained under not making creative work premise, broadly falls into
The scope of this utility model protection.
In this utility model, relate to the description of " first ", " second " etc. be only used for describing purpose, and not
It is understood that as instruction or implies its relative importance or the implicit quantity indicating indicated technical characteristic.
Thus, define " first ", the feature of " second " can express or implicitly include at least one should
Feature.It addition, the technical scheme between each embodiment can be combined with each other, but must be with ability
Based on territory those of ordinary skill is capable of, when the combination of technical scheme occurs conflicting or cannot be real
Will be understood that the combination of this technical scheme does not exists now, the protection model not required at this utility model
Within enclosing.
The utility model proposes a kind of capacitor discharging circuit.
With reference to the functional module signal that Fig. 2 to 3, Fig. 2 are this utility model capacitor discharging circuit one embodiment
Figure；Fig. 3 is the electrical block diagram of this utility model another embodiment of capacitor discharging circuit.
As in figure 2 it is shown, in this utility model embodiment, this capacitor discharging circuit includes the first terminals
Sub-P1, the second binding post P2, discharge cell 10, current adjustment unit 20 and display unit 40；
Described first binding post P1 and the second binding post P2 is used for and electric capacity to be discharged (not shown)
The two poles of the earth connect；The input of described discharge cell 10 is connected with described first binding post P1；Described put
The outfan of electric unit 10 is connected with the input of described sampling unit 30, described sampling unit 30 defeated
Go out end to be connected with described second binding post P2；The collected end of described sampling unit 30 and described electric current
The signals collecting end of adjustment unit 20 connects, and the electric current of described current adjustment unit 20 adjusts end with described
The end that is adjusted of discharge cell 10 connects, wherein: described discharge cell 10, in described first wiring
When terminals P 1 and the second binding post P2 is connected with the two poles of the earth of described electric capacity to be discharged, wait to put described in release
The storage voltage of electricity electric capacity；Described sampling unit 30, for gathering the discharge current of described discharge cell 10；
Described current adjustment unit 20, adjusts for the discharge current size collected according to described sampling unit 30
The electric current of described discharge cell 10, so that described discharge current is constant.
When needs use described capacitor discharging circuit, by described first binding post P1 and electric capacity to be discharged
Positive pole connect, described second binding post P2 is connected with the negative pole of electric capacity to be discharged.Electric capacity to be discharged
Positive pole release positive charge, negative pole release negative charge, electric capacity to be discharged and described discharge cell 10 and described
Sampling unit 30 forms current loop, and described discharge cell 10 discharges.Meanwhile, described sampling is single
Unit 30 gathers the discharge current of described discharge cell 10, and described current adjustment unit 20 is according to described sampling
The discharge current that unit 10 collects adjusts the corresponding signal that adjusts of end output to described electric discharge at its electric current
Unit 10 be adjusted end, constant to flow through the size of current of described discharge cell 10.Through one section
After time t, electric capacity to be discharged has discharged.
Technical solutions of the utility model gather according to sampling unit 30 by using current adjustment unit 20
The discharge current of discharge cell 10 adjust the electric current of discharge cell 10 so that its constant magnitude, due to
The size of current flowing through described discharge cell 10 is constant, therefore, varies in size for reservoir voltage
Electric capacity to be discharged, the capacitor discharging circuit that the utility model proposes can steadily, rapidly to electricity to be discharged
Hold and discharge, there is the feature of highly versatile.
Preferably, as it is shown on figure 3, above-mentioned discharge cell 10 includes the first resistance R1 and the second audion
Q2；First end of described first resistance R1 is connected with described first binding post P1, described first resistance
Second end of R1 is connected with the base stage of described second audion Q2；Described first resistance R1 and described second
The link node of audion Q2 be described discharge cell 10 be adjusted end, described second audion Q2
The input of the most described discharge cell of current collection 10, the transmitting of described second audion Q2 is extremely described
The outfan of discharge cell 10.It should be noted that in the present embodiment, described second audion Q2 is
NPN type triode.
When described capacitor discharging circuit the first binding post P1 and the second binding post P2 respectively with wait to put
When the positive pole of electricity electric capacity and negative pole connect, the positive voltage of capacitance cathode to be discharged is defeated through described first resistance R1
Entering the base stage to described second audion Q2, described second audion Q2 conducting, discharge cell 10 is opened
Begin to discharge.It is noted that described discharge cell 10 also includes the second resistance R2；Described second electricity
First end of resistance R2 is connected with second end of described first resistance R1, the second of described second resistance R2
End is connected with the base stage of described second audion Q2；Described second resistance R2 and described second audion Q2
Link node be described discharge cell 10 be adjusted end.The voltage stored due to electric capacity to be discharged may
Very big, set up described second resistance R2 and can limit the electric current flowing through described second audion Q2 further
Size, thus improve the reliability of capacitor discharging circuit.
Preferably, described sampling unit 30 includes the 3rd resistance R3, first end of described 3rd resistance R3
For collected end and the input of described sampling unit 30, second end of described 3rd resistance R3 is described
The outfan of sampling unit 30.When described discharge cell 10 starts to discharge, described 3rd resistance R3's
There is electric current to flow through between first end and the second end, and forming voltage drop, gather for current adjustment unit 20.
Preferably, described current adjustment unit 20 includes the 4th resistance R4 and the first audion Q1；Described
First end of the 4th resistance R4 is the signals collecting end of described current adjustment unit 20, described 4th resistance
Second end of R4 is connected with the base stage of described first audion Q1, the colelctor electrode of described first audion Q1
Electric current for described current adjustment unit 20 adjusts end, and the emitter stage of described first audion Q1 is with described
Second binding post P2 connects.It should be noted that in the present embodiment, described first audion Q1 is
NPN type triode.Certainly, above-mentioned first audion Q1 and the second audion Q2 can also be PNP
Type audion, but when realizing identical function, its circuit connecting relation needs to change accordingly, this
Place no longer describes in detail.
When the voltage of the first end being carried in described 4th resistance R4 is more than or equal to described one or three pole
During the cut-in voltage of pipe Q1, described first audion Q1 conducting, described first audion Q1 can get
Flow into the electric current of described discharge cell 10, and then adjust the size of current flowing through described discharge cell 10.
When the voltage of the first end being carried in described 4th resistance R4 is less than the unlatching electricity of described first audion Q1
During pressure, described first audion Q1 cut-off, described first audion Q1 is to described discharge cell 10
Duty is without impact.
Further, described capacitor discharging circuit also includes the electric discharge shape for indicating described electric capacity to be discharged
The display unit 40 of state, the power input of described display unit 40 is with described first binding post P1 even
Connecing, the outfan of described display unit 40 is connected with the input of described discharge cell 10.When described aobvious
Show that when the power input of unit 40 has voltage to input, described display unit 40 shows, waits to put to indicate
Electricity electric capacity is in discharge condition this moment.
Owing to described display unit 40 concatenates with described discharge cell 10, and it is single to flow through described electric discharge
The size of current of unit 10 is constant so that as long as electric capacity two ends to be discharged there is also residual voltage, will be persevering
The electric current of sizing flows through described display unit 40.Therefore, described display unit 40 can indicate accurately
Whether electric capacity to be discharged has discharged, and technical solutions of the utility model also have the feature that reliability is high.
Preferably, above-mentioned display unit 40 includes LED.It should be noted that described display unit
40 can include the LED that the specifications parameter of multiple concatenation is identical, it is also possible to include the display such as display screen
Part, this place does not limits.In the present embodiment, described display unit 40 includes that a LED is (such as Fig. 3
Shown LED), easy to use the most cost-effective.
Further, described capacitor discharging circuit also includes rectification unit 50；The first of described rectification unit
Input and the second input are connected with described first binding post P1 and the second binding post P2 respectively,
The cathode output end of described rectification unit 50 is connected with the power input of described display unit 40, described
The cathode output end of rectification unit is connected with the outfan of described sampling unit 30.Wherein, described rectification list
Unit 50 includes the first diode (not shown), the second diode (not shown), the 3rd diode (figure
Not shown) and the 4th diode (not shown)；Described first diode cathode and described second diode
Anode connect, its link node constitute described rectification unit first input end；Described second diode
Negative electrode be connected with the negative electrode of described 3rd diode, its link node constitute described rectification unit positive pole
Outfan；The anode of described 3rd diode is connected with the negative electrode of described 4th diode, its link node
Constitute the second input of described rectification unit；The anode of described 4th diode and described first diode
Anode connect, its link node constitute described rectification unit cathode output end.When needs use described
During capacitor discharging circuit, described first binding post P1 can be connected the positive pole of electric capacity to be discharged, by described
Second binding post P2 connects the negative pole of electric capacity to be discharged；Now, the positive pole of described rectification unit 50 is defeated
Go out end output positive voltage, the cathode output end output negative voltage of described rectification unit 50.Also can, by described
First binding post P1 connects the negative pole of electric capacity to be discharged, is connected by described second binding post P2 and waits to put
The positive pole of electricity electric capacity；Now, the cathode output end output positive voltage of described rectification unit 50, described rectification
The cathode output end output negative voltage of unit 50.Set up described rectification unit 50, described first can be made to connect
The wiring of line terminals P1 and described second binding post P2 is not limited by electric capacity both positive and negative polarity to be discharged, enters
One step enhances the versatility of described capacitor discharging circuit.
Below in conjunction with Fig. 2 and Fig. 3, the operation principle of this utility model capacitor discharging circuit is described:
When described first binding post P1 and described second binding post P2 is connected with electric capacity to be discharged,
The cathode output end output positive electricity of described rectification unit 50 is depressed into described first resistance R1 and described LED.
This positive voltage is delivered to described second audion Q2 through described first resistance R1 and described second resistance R2
Base stage, described second audion Q2 conducting, described second audion Q2 start electric discharge, described LED
Lamp is bright.Meanwhile, the two ends of described 3rd resistance R3 produce voltage drop, and by described 4th resistance
The base stage of R4 input extremely described first audion Q1.
Assume that the constant discharge current arranged by arranging circuit element parameter is I, when described two or three pole
When the discharge current of pipe Q2 is more than I, the voltage drop at described 3rd resistance R3 two ends increases, and described first
The base current of audion Q1 increases, the conducting of described first audion Q1, described first audion
Electric current between colelctor electrode and the emitter stage of Q1 increases, and causes the base current of described second audion Q2
Reducing, the discharge current of described second audion Q2 reduces.Electric discharge electricity as described second audion Q2
When stream is less than I, the voltage drop at described 3rd resistance R3 two ends reduces, the base of described first audion Q1
Electrode current reduces, described first audion Q1 cut-off, the colelctor electrode of described first audion Q1 and transmitting
Electric current between pole reduces, and then the base current of described second audion Q2 increases, described two or three pole
The discharge current of pipe Q2 increases.So, it is achieved that the size of the discharge current of described second audion Q2
Constant.
Owing to the discharge current of described second audion Q2 is the most constant, and stored with electric capacity to be discharged
Voltage swing is unrelated, and therefore, the capacitor discharging circuit that the utility model proposes can tackle the different electricity of storage
The electric discharge of the electric capacity of pressure value, versatility is the strongest.As long as additionally, due to electric capacity to be discharged is stored with voltage,
Described second audion Q2 will discharge, and discharge current constant magnitude, therefore, flows through described LED
The size of current of lamp is constant, and described LED can indicate whether electric capacity to be discharged has discharged exactly,
Reliability is high.
The invention also discloses a kind of electric capacity electric discharge instrument, put including the electric capacity shown in Fig. 1 to Fig. 3
Electricity circuit.
The foregoing is only preferred embodiment of the present utility model, not thereby limit of the present utility model specially
Profit scope, every under utility model of the present utility model is conceived, utilize this utility model description and attached
The equivalent structure transformation that figure content is made, or directly/be indirectly used in other relevant technical fields and all include
In scope of patent protection of the present utility model.
Claims (9)
1. a capacitor discharging circuit, it is characterised in that include the first binding post, the second binding post,
Discharge cell, current adjustment unit and sampling unit；Described first binding post and the second binding post are used
It is connected in the two poles of the earth with electric capacity to be discharged；The input of described discharge cell is with described first binding post even
Connect；The outfan of described discharge cell is connected with the input of described sampling unit, described sampling unit
Outfan is connected with described second binding post；The collected end of described sampling unit adjusts with described electric current
The signals collecting end of unit connects, and the electric current of described current adjustment unit adjusts end and described discharge cell
It is adjusted end to connect, wherein:
Described discharge cell, for be discharged with described at described first binding post and the second binding post
When the two poles of the earth of electric capacity connect, discharge the storage voltage of described electric capacity to be discharged；
Described sampling unit, for gathering the discharge current of described discharge cell；
Described current adjustment unit, adjusts for the discharge current size collected according to described sampling unit
The electric current of described discharge cell, so that described discharge current is constant.
2. capacitor discharging circuit as claimed in claim 1, it is characterised in that described discharge cell includes
First resistance and the second audion；First end of described first resistance is connected with described first binding post,
Second end of described first resistance is connected with the base stage of described second audion；Described first resistance is with described
The link node of the second audion be described discharge cell be adjusted end, the current collection of described second audion
The input of the most described discharge cell, the most described discharge cell of transmitting of described second audion defeated
Go out end.
3. capacitor discharging circuit as claimed in claim 2, it is characterised in that described discharge cell also wraps
Include the second resistance；First end of described second resistance is connected with the second end of described first resistance, and described
Second end of two resistance is connected with the base stage of described second audion；Described second resistance and the described 2nd 3
The link node of pole pipe be described discharge cell be adjusted end.
4. capacitor discharging circuit as claimed in claim 1, it is characterised in that described current adjustment unit
Including the 4th resistance and the first audion；First end of described 4th resistance is described current adjustment unit
Signals collecting end, the second end of described 4th resistance is connected with the base stage of described first audion, and described
The electric current of the most described current adjustment unit of current collection of one audion adjusts end, sending out of described first audion
Emitter-base bandgap grading is connected with described second binding post.
5. capacitor discharging circuit as claimed in claim 1, it is characterised in that described capacitor discharging circuit
Also include the display unit of discharge condition for indicating described electric capacity to be discharged；The electricity of described display unit
Source input is connected with described first binding post, the outfan of described display unit and described discharge cell
Input connect.
6. capacitor discharging circuit as claimed in claim 5, it is characterised in that described display unit includes
LED.
7. capacitor discharging circuit as claimed in claim 1, it is characterised in that described sampling unit includes
3rd resistance, the collected end that the first end is described sampling unit of described 3rd resistance and input, institute
State the outfan that the second end is described sampling unit of the 3rd resistance.
8. the capacitor discharging circuit as described in claim 5 or 6, it is characterised in that described electric capacity discharges
Circuit also includes rectification unit；The first input end of described rectification unit is connected with described first binding post,
Second input of described rectification unit is connected with described second binding post, the positive pole of described rectification unit
Outfan is connected with the power input of described display unit, the cathode output end of described rectification unit and institute
The outfan stating sampling unit connects.
9. an electric capacity electric discharge instrument, it is characterised in that include as described in any one of claim 1 to 8
Capacitor discharging circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620111624.5U CN205544916U (en) | 2016-02-03 | 2016-02-03 | Capacitor discharge circuit and capacitor discharge instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620111624.5U CN205544916U (en) | 2016-02-03 | 2016-02-03 | Capacitor discharge circuit and capacitor discharge instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205544916U true CN205544916U (en) | 2016-08-31 |
Family
ID=56776084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620111624.5U Expired - Fee Related CN205544916U (en) | 2016-02-03 | 2016-02-03 | Capacitor discharge circuit and capacitor discharge instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205544916U (en) |
-
2016
- 2016-02-03 CN CN201620111624.5U patent/CN205544916U/en not_active Expired - Fee Related
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| 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: 20160831 Termination date: 20210203 |
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| CF01 | Termination of patent right due to non-payment of annual fee |