CN106033883A - Discharging circuit - Google Patents
Discharging circuit Download PDFInfo
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- CN106033883A CN106033883A CN201510122703.6A CN201510122703A CN106033883A CN 106033883 A CN106033883 A CN 106033883A CN 201510122703 A CN201510122703 A CN 201510122703A CN 106033883 A CN106033883 A CN 106033883A
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- resistance
- divider resistance
- audion
- control module
- discharge circuit
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Abstract
The invention discloses a discharging circuit. The discharging circuit comprises a control module, a first branch, a second branch and an intermediate capacitor, and the first branch, the second branch and the intermediate capacitor are connected in parallel between two voltage ends of the power grid; the first branch comprises a current-limiting resistor and a triode in serial connection; the second branch comprises a first voltage dividing resistor and a second voltage dividing resistor in serial connection; one end of the control module is connected between the first voltage dividing resistor and the second voltage dividing resistor; a base electrode of the triode is connected between the first voltage dividing resistor and the second voltage dividing resistor, and connected to one end of the control module; and one end of the intermediate capacitor is connected to the positive voltage end of the power grid, and the other end of the intermediate capacitor is connected to the negative voltage end of the power grid and the other end of the control module. According to the discharging circuit provided by the invention, the control module and the voltage dividing resistors are used to control connection and disconnection of the triode; and compared with a mechanical contactor in the prior art, the triode can be connected rapidly, and rapid discharging can be realized.
Description
Technical field
The present invention relates to electronic applications, particularly relate to discharge circuit.
Background technology
At present in the design of track traffic high-vol, need to introduce quick discharging circuit.This circuit
Effect be when current transformer stops or during fault, the electric charge quickly retained in release intermediate capacitance, it is ensured that set
Standby safety.
In traditional discharge circuit, generally utilize mechanical contactor as switch, when current transformer stops
Or fault is when needing repid discharge, control system sends control instruction makes mechanical contactor close, and is formed
Closed-loop path so that the electric charge retained in electric capacity is discharged by mechanical contactor switch.Fig. 1 is
The structural representation of discharge circuit of the prior art, as it is shown in figure 1, the electric capacity 51 in this discharge circuit
It is that the Guan Bi by mechanical contactor 21 carries out discharging.
But, when mechanical contactor is as switch, control system is closed from sending control mechanical contactor
The time interval that the instruction closed performs Guan Bi electric discharge to mechanical contactor is the longest, it is impossible to reach good fast
Speed discharge effect.
Summary of the invention
It is an object of the invention to provide a kind of discharge circuit, use in order to solve the discharge circuit of prior art
What mechanical contactor caused as switch response time length cannot the problem of repid discharge.
The present invention provides a kind of discharge circuit, including: control module and parallel with one another in line voltage two ends
The first branch road, the second branch road, intermediate capacitance；Described first branch road includes: the current limliting electricity being serially connected
Resistance and audion, described current-limiting resistance is at transistor collector described in described triode ON limit
Or the electric current at emitter stage two ends, the two ends of described first branch road respectively with the anode of described line voltage and negative
End connects；Described second branch road includes: the first divider resistance being serially connected and the second divider resistance, institute
The anode of one end and described line voltage of stating the first divider resistance is connected, the one of described second divider resistance
End is connected with the negative terminal of described line voltage；One end of described control module is connected to described first dividing potential drop electricity
Hindering between described second divider resistance, described control module leads through and off for control described triode
Open；The base stage of described audion is connected between described first divider resistance and described second divider resistance,
And be connected with one end of described control module；One end of described intermediate capacitance and the anode of described line voltage
Be connected, the other end of described intermediate capacitance respectively with the negative terminal of described line voltage and described control module
The other end be connected.
The discharge circuit that the present invention provides, controls the conducting of audion by control module and divider resistance
With disconnection, compared with the mechanical contactor of prior art, triode ON is rapid, it is possible to achieve quickly
Electric discharge, and the volume ratio mechanical contactor of audion is little, and cost is relatively low.
Accompanying drawing explanation
Fig. 1 is the structural representation of discharge circuit of the prior art；
Fig. 2 is the discharge circuit structural representation of one embodiment of the invention；
Fig. 3 is the discharge circuit structural representation of another embodiment of the present invention；
Fig. 4 is the discharge circuit structural representation of further embodiment of this invention.
Detailed description of the invention
Fig. 2 is the discharge circuit structural representation of the embodiment of the present invention.As in figure 2 it is shown, the present embodiment carries
The discharge circuit of confession include control module 6 and the first branch road in line voltage two ends parallel with one another, second
Branch road and intermediate capacitance 5.
Wherein, the first branch road includes current-limiting resistance 1 and the audion 2 being serially connected, and current-limiting resistance 1 is used
In turning on limit audion 2 colelctor electrode or the electric current at emitter stage two ends at audion 2, the first branch road
Two ends are connected with anode and the negative terminal of line voltage respectively.Wherein, current-limiting resistance 1 can be as shown in Figure 2
It is connected to one end of audion 2 colelctor electrode, naturally it is also possible to be connected to one end of audion 2 emitter stage,
Thus prevent short circuit between the both positive and negative polarity of line voltage.
Second branch road includes the first divider resistance 3 and the second divider resistance 4, the first dividing potential drop being serially connected
One end of resistance 3 is connected with the anode of line voltage, one end of the second divider resistance 4 and line voltage
Negative terminal connects.
One end 61 of control module 6 is connected between the first divider resistance 3 and the second divider resistance 4, control
Molding block 6 is for controlling conducting and the disconnection of triode 2.
The base stage of audion 2 is connected between the first divider resistance 3 and the second divider resistance 4, and with control
One end 61 of molding block 6 is connected, and wherein, audion 2 is NPN type triode.
One end of intermediate capacitance 5 is connected with the anode of line voltage, and the other end of intermediate capacitance 5 is respectively
It is connected with the negative terminal of line voltage and the other end 62 of control module 6.
Concrete, when converter system normally works, the control instruction that control module 6 sends is high electricity
Flat, and one end 61 of control module 6 turns on the other end 62, now the base stage of audion 2 with
Voltage between emitter-base bandgap grading is 0V, is unsatisfactory for the turn-on condition of audion 2, and audion 2 is not turned on.And work as
When converter system breaks down or shuts down, the control instruction that now control system 6 sends is low level,
One end 61 of control module 6 is not turned on the other end 62, and now audion 2 is at line voltage and
Audion 2 is made to meet conducting voltage, audion under the effect of one divider resistance 3 and the second divider resistance 4
2 conductings, the electric charge therefore retained in intermediate capacitance 5 quickly can be discharged by the first branch road, first
Electric charge can be derived, wherein it should be noted that control module 6 by road with ground connection or by other means
Realize the connection between its one end 61 and other end 62 and disconnect the circuit design that can use prior art,
Such as mechanical relay or solid-state relay etc., as long as device or the circuit of break-make can be controlled,
It is not limited at this.
From above technical scheme, the discharge circuit that the present invention provides is by control module 6 and dividing potential drop
Resistance controls the conducting of audion 2, and compared with the mechanical contactor of prior art, audion 2 can
Respond rapidly to, and then realize repid discharge, and the volume ratio mechanical contactor of audion 2 is little, become
This is relatively low.
Owing to line voltage is typically larger than 600V, therefore, in order to prevent the high pressure of line voltage to controlling mould
Block 6 causes damage, and therefore on the basis of above-described embodiment, Fig. 3 is putting of another embodiment of the present invention
Electricity electrical block diagram, as it is shown on figure 3, this discharge circuit also includes light-coupled isolation module 7, is used for
Isolation line voltage and control module 6, the first outfan 71 of light-coupled isolation module 6 is connected to first point
It is connected between piezoresistance 3 and the second divider resistance 4 and with the base stage of audion 2, light-coupled isolation module 6
The second outfan 72 be connected with emitter stage, the second divider resistance 4 and the intermediate capacitance 5 of audion 2,
The input of light-coupled isolation module 7 is connected with control module 6.Wherein, light-coupled isolation module 7 is high electricity
The optocoupler of flat conducting, optocoupler uses linear optical coupling and non-linear optocoupler, can make according to actual needs
Go out corresponding selection.
Concrete, when converter system normally works, the control instruction that control module 6 sends is high electricity
Flat, now light-coupled isolation module 7 turns on, the first outfan 71 and the second output of light-coupled isolation module 7
End 72 conducting, now the voltage between base stage and the emitter stage of audion 2 is 0V, is unsatisfactory for audion 2
Turn-on condition, audion 2 is not turned on.And when converter system breaks down or shuts down, now
The control instruction that control system 6 sends is low level, and therefore light-coupled isolation module 7 is not turned on, now three
Pole pipe 2 makes audion under the effect of line voltage and the first divider resistance 3 and the second divider resistance 4
2 meet conducting voltage, and audion 2 turns on, and the electric charge therefore retained in intermediate capacitance 5 can be by the
One branch road quickly discharges.
From above technical scheme, the discharge circuit that the present invention provides is possible not only to realize audion 2
Rapidly conducting carries out repid discharge, can realize simultaneously between line voltage and control module 6 electric every
From, enhance the electric stability of circuit, and light-coupled isolation module 7 cost is relatively low, its operation principle
Being that applied voltage makes the diode current flow within light-coupled isolation module 7 luminous, rear end light-receiving device accepts light
Producing electric current after line, therefore it receives the response speed device more than control break-make of the prior art of signal
Part is fast, the most further accelerates the velocity of discharge of whole discharge circuit.
Further, on the basis of above-described embodiment, Fig. 4 is the electric discharge of further embodiment of this invention
Electrical block diagram, as shown in Figure 4, the discharge circuit that the present embodiment provides also includes optocoupler current limliting
Resistance 8, optocoupler current-limiting resistance 8 is connected to the base stage of audion 2 and the first of light-coupled isolation module 7
Between outfan 71, it is used for preventing light-coupled isolation module 7 from crossing stream, i.e. leads in light-coupled isolation module 7
In the case of Tong, be can ensure that the first outfan of light-coupled isolation module 7 by optocoupler current-limiting resistance 8
71 and second electric currents between outfan 72, below rated current, play protection light-coupled isolation module
Light-receiving device in 7 is not damaged.
Owing to line voltage is typically the magnitude of voltage of upper kilovolt, and the conducting voltage of audion is the most not
When conducting voltage to 1V, i.e. line voltage Yu audion differs greatly, in order to ensure that audion 2 turns on
Voltage, therefore the resistance of the first divider resistance 3 is more than the resistance of the second divider resistance 4.
Further, in the case of light-coupled isolation module 7 turns on, due to the second divider resistance 4 and light
It is parallel relationship between coupling current-limiting resistance 8, for audion while preventing light-coupled isolation module 7 from turning on
2 mislead, therefore, the resistance of optocoupler current-limiting resistance 8 should be far smaller than the resistance of the second divider resistance 4
Value guarantee audion 2 base stage and emitter stage between voltage close to 0V, i.e. optocoupler current-limiting resistance
The resistance of 8 should be far smaller than the resistance of the second divider resistance 4 could be in the feelings of light-coupled isolation module 7 conducting
Under condition, audion is not turned on, thus preferably ensures the stability that whole discharge circuit works.Preferably,
The resistance of the resistance of the second divider resistance/described optocoupler current-limiting resistance is more than or equal to 100.
Through test, the discharge time of discharge circuit of the prior art is the 4-6 second, and the present embodiment provides
Discharge circuit be only the 2-3 second discharge time.
It should be noted that according to electric circuit knowledge, the voltage at the second divider resistance 4 two ends is
U × R2/ (R2+R1), wherein, U is line voltage, and R1 is the resistance of the first divider resistance, and R2 is second
The resistance of divider resistance, the voltage at the first divider resistance 3 two ends is U × R1/ (R2+R1).Therefore, exist
In different engineer applied, can be according to electric pressure and three poles being carried in whole discharge circuit two ends
The conducting voltage of pipe 2 adjusts the resistance of first divider resistance the 3, second divider resistance 4, if certainly
Discharge circuit also includes optocoupler current-limiting resistance 8, also should condition optocoupler current-limiting resistance 8 according to actual needs
Resistance.
From above technical scheme, the discharge circuit that the present invention provides is permissible by optocoupler current-limiting resistance 8
Prevent misleading of audion 2, and the metering function to light-coupled isolation module 7 can be played, it is ensured that
The stability of circuit work, and the design of whole discharge circuit is simple, with low cost.
Last it is noted that above example is only in order to illustrate technical scheme, rather than to it
Limit；Although the present invention being described in detail with reference to previous embodiment, the ordinary skill of this area
Personnel it is understood that the technical scheme described in foregoing embodiments still can be modified by it, or
Person carries out equivalent to wherein portion of techniques feature；And these amendments or replacement, do not make corresponding skill
The essence of art scheme departs from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1. a discharge circuit, it is characterised in that including: control module and parallel with one another in line voltage
First branch road at two ends, the second branch road, intermediate capacitance；
Described first branch road includes: the current-limiting resistance being serially connected and audion, and described current-limiting resistance is used for
At transistor collector or the electric current at emitter stage two ends described in described triode ON limit, described first
The two ends of branch road are connected with anode and the negative terminal of described line voltage respectively；
Described second branch road includes: the first divider resistance being serially connected and the second divider resistance, described
One end of one divider resistance is connected with the anode of described line voltage, one end of described second divider resistance with
The negative terminal of described line voltage connects；
One end of described control module is connected between described first divider resistance and described second divider resistance,
Described control module is for controlling conducting and the disconnection of described triode；
The base stage of described audion is connected between described first divider resistance and described second divider resistance,
And be connected with one end of described control module；
One end of described intermediate capacitance is connected with the anode of described line voltage, and described intermediate capacitance is additionally
One end other end with the negative terminal of described line voltage and described control module respectively is connected.
Discharge circuit the most according to claim 1, it is characterised in that also include: light-coupled isolation mould
Block, is used for isolating described line voltage and described control module, the first output of described light-coupled isolation module
End is connected to be connected between described first divider resistance and the second divider resistance and with the base stage of described audion,
Second outfan of described light-coupled isolation module and the emitter stage of described audion, described second divider resistance
And described intermediate capacitance is connected, the input of described light-coupled isolation module is connected with described control module.
Discharge circuit the most according to claim 2, it is characterised in that also include: optocoupler current limliting electricity
Resistance, described optocoupler current-limiting resistance is connected to the base stage of described audion and the first of described light-coupled isolation module
Between outfan, it is used for preventing light-coupled isolation module from crossing stream.
Discharge circuit the most according to claim 1, it is characterised in that described first divider resistance
Resistance is more than the resistance of described second divider resistance.
5. according to the discharge circuit described in claim 3 or 4, it is characterised in that described second dividing potential drop electricity
The resistance of the resistance/described optocoupler current-limiting resistance of resistance is more than or equal to 100.
Discharge circuit the most according to claim 1, it is characterised in that described audion is NPN type
Audion.
Discharge circuit the most according to claim 2, it is characterised in that described light-coupled isolation module is
The optocoupler of high level conducting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510122703.6A CN106033883A (en) | 2015-03-19 | 2015-03-19 | Discharging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510122703.6A CN106033883A (en) | 2015-03-19 | 2015-03-19 | Discharging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106033883A true CN106033883A (en) | 2016-10-19 |
Family
ID=57149147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510122703.6A Pending CN106033883A (en) | 2015-03-19 | 2015-03-19 | Discharging circuit |
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| Country | Link |
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| CN (1) | CN106033883A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787657A (en) * | 2016-12-29 | 2017-05-31 | 上海新时达电气股份有限公司 | Vehicle-mounted drive control device capacitor discharging circuit |
| CN106899283A (en) * | 2017-02-22 | 2017-06-27 | 南京南瑞继保电气有限公司 | Protectiveness triggers circuit based on discrete component |
| CN108711842A (en) * | 2018-08-20 | 2018-10-26 | 珠海格力电器股份有限公司 | Discharge device |
| CN109327934A (en) * | 2018-10-22 | 2019-02-12 | 横店集团得邦照明股份有限公司 | A kind of capacitor quick discharging circuit and its implementation |
| CN112165241A (en) * | 2020-09-08 | 2021-01-01 | 深圳市瑞沃德生命科技有限公司 | Discharge circuit and centrifuge |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110062919A1 (en) * | 2009-09-17 | 2011-03-17 | Foxsemicon Integrated Technology, Inc. | Discharge circuit |
| CN102025357A (en) * | 2009-09-18 | 2011-04-20 | 富士迈半导体精密工业（上海）有限公司 | Discharge circuit |
| CN102594111A (en) * | 2012-02-24 | 2012-07-18 | 中兴通讯股份有限公司 | Quick discharge circuit |
| CN202586329U (en) * | 2012-05-25 | 2012-12-05 | 深圳市中兴昆腾有限公司 | Self-discharge circuit |
| CN204517389U (en) * | 2015-03-19 | 2015-07-29 | 北车大连电力牵引研发中心有限公司 | Discharge circuit |
-
2015
- 2015-03-19 CN CN201510122703.6A patent/CN106033883A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110062919A1 (en) * | 2009-09-17 | 2011-03-17 | Foxsemicon Integrated Technology, Inc. | Discharge circuit |
| CN102025357A (en) * | 2009-09-18 | 2011-04-20 | 富士迈半导体精密工业（上海）有限公司 | Discharge circuit |
| CN102594111A (en) * | 2012-02-24 | 2012-07-18 | 中兴通讯股份有限公司 | Quick discharge circuit |
| CN202586329U (en) * | 2012-05-25 | 2012-12-05 | 深圳市中兴昆腾有限公司 | Self-discharge circuit |
| CN204517389U (en) * | 2015-03-19 | 2015-07-29 | 北车大连电力牵引研发中心有限公司 | Discharge circuit |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787657A (en) * | 2016-12-29 | 2017-05-31 | 上海新时达电气股份有限公司 | Vehicle-mounted drive control device capacitor discharging circuit |
| CN106899283A (en) * | 2017-02-22 | 2017-06-27 | 南京南瑞继保电气有限公司 | Protectiveness triggers circuit based on discrete component |
| CN106899283B (en) * | 2017-02-22 | 2019-12-06 | 南京南瑞继保电气有限公司 | Protective trigger circuit based on discrete components |
| CN108711842A (en) * | 2018-08-20 | 2018-10-26 | 珠海格力电器股份有限公司 | Discharge device |
| CN109327934A (en) * | 2018-10-22 | 2019-02-12 | 横店集团得邦照明股份有限公司 | A kind of capacitor quick discharging circuit and its implementation |
| CN109327934B (en) * | 2018-10-22 | 2024-01-23 | 横店集团得邦照明股份有限公司 | Capacitor rapid discharging circuit and implementation method thereof |
| CN112165241A (en) * | 2020-09-08 | 2021-01-01 | 深圳市瑞沃德生命科技有限公司 | Discharge circuit and centrifuge |
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Application publication date: 20161019 |
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