CN206164085U - Direct -current input surge suppression circuit - Google Patents
Direct -current input surge suppression circuit Download PDFInfo
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- CN206164085U CN206164085U CN201621170471.8U CN201621170471U CN206164085U CN 206164085 U CN206164085 U CN 206164085U CN 201621170471 U CN201621170471 U CN 201621170471U CN 206164085 U CN206164085 U CN 206164085U
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- 230000001629 suppression Effects 0.000 title claims abstract description 6
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 10
- 239000000853 adhesive Substances 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 9
- 230000001052 transient effect Effects 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000002955 isolation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model discloses a direct -current input surge suppression circuit, including providing DC power supply's input and being used for connecting the output of back level circuit, connect in surge protection circuit between input and the output, still contains surge protection detection circuitry, through increasing surge protection detection circuitry to current surge protection circuit, follow the input sample voltage signal of the switch element in the surge protection circuit promptly and give surge protection detection circuitry, this voltage signal's height represents that two kinds of different states of relay are actuation or off -state promptly in the surge protection circuit, it outwards exports the CS height to correspond after surge protection detection circuitry carries out level conversion, low level signal, from then the level circuit just can be high according to CS's signal level, low change, whether judge for effective actuation relay in preventing the surge protection circuit, and can regard as the interlock control signal, be the definite signal whether back level circuit supplied power promptly, chain in the control has been realized. The technical scheme of the utility model being applicable to direct current input circuit, being applicable to too and inputing to among the dc circuit of interchange after the rectification, the circuit form is simple, and the reliability is higher.
Description
Technical field
The utility model belongs to field of power electronics, and more particularly, to a kind of direct current surge restraint circuit is input into.
Background technology
In direct current supply in DC supply input or after AC rectification, its circuit rear end is connected to larger capacity
Capacitor C1 in energy storage or filter capacitor, such as Fig. 1.It is nearly hectovolt or hectovolt between DC input terminal DCin+, DCin-
DC voltage above, in the moment for accessing direct current input, the upper voltages of C1 are zero, and very big surge impact electric current is had in circuit
Produce, make circuit short-time overload occur, it is possible to cause circuit unstable, such as short circuit shutdown protection, components and parts failure.So
Direct current is input between DCin+, DCin- and direct current output DCout+, DCout- and must adopt surge restraint circuit.
In prior art, typically there is anti-surge protection circuit as shown in Figure 1.In Fig. 1, using by resistor R1, relay
The circuit arrangement energy of device K1, resistor R2 and resistor R3, filter condenser C1 and delay capacitor C2, switch element N1 compositions
Surge current suppression.Operation principle is, when dc source is accessed, DCin+, DCin- voltage is by resistor R1 to electric capacity C1
Charge, due to the presence of R1, the voltage between DCout+, DCout- slowly charges, so as to prevent circuit in occur it is very big
Surge current；The RC time delays electricity that the voltage of the pin of control end 1 of switch element N1 is made up of resistor R2, resistor R3 and electric capacity C2
Road controls, and the voltage at electric capacity C2 two ends slowly rises, when C2 both end voltages rise to the pin of control end 1 needs of switch element N1
After turning-on voltage, just turn between 2 pin and 3 pin of N1, after N1 conductings, the 3 of the line bag of accessory power supply Vcc voltage Jing relay K1
2 pin and 3 pin of pin and 4 pin and N1（GND）Path is formed, the line bag of relay K1 produces electromagnetic attraction by its relay after being powered
The adhesive of contact 1 and 2 of device, it is after the adhesive of contact that resistor R1 is short-circuit, when DCout+, DCout- to late-class circuit provide power it is defeated
When going out, DC current is powered with regard to the contact 1 of Jing relay K1 and the rear class of 2 couples of DCout+, DCout-.Thus, it is desirable to DCout
+, DCout- to late-class circuit provide power output when, the contact 1 and 2 of relay K1 is necessary for effective attracting state, otherwise electricity
Resistance device R1 will be burnt out to open-circuit condition because continuous power is excessive；If after resistor R1 open circuits, due to there is no R1 when go up electricity again
Metering function, just without slow charging process, two contacts 1 and 2 of relay K1 also can be because of the moment of electric capacity C1 wave for electric capacity C1
Gush dash current and produce spark, cause adhesion or loose contact, so as to cause the failure of the circuit so that equipment job failure.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the utility model provides a kind of direct current and is input into Surge suppression
Circuit.
The utility model provides a kind of direct current and is input into surge restraint circuit, including the input DCin for providing dc source
+, DCin- and output end DCout+, DCout- for connecting late-class circuit, be connected to the input and output end
Surge protection circuit between DCout+, DCout-, described surge protection circuit contains first resistor device R1 and filter capacitor
Partial pressure unit, delay capacitor C2, switch that device C1, relay K1, second resistance device R2 and 3rd resistor device R3 are composed in series
Unit N1, auxiliary DC power supply Vcc, filter capacitor C1 is accessed between both positive and negative polarity DCin+, DCin- of direct-flow input end, and first
The negative pole DCin- of direct-flow input end is accessed in resistor R1 one end, and the other end accesses filter capacitor C1 and direct-flow input end negative pole
DCin- connected node；Two contact 1 and 2 of relay K1 is in parallel respectively to access first resistor device R1 two ends, relay K1 line bags
Auxiliary DC power supply Vcc is accessed in one end, and the other end accesses the input of switch element N1；Second resistance device R2 and 3rd resistor
Access auxiliary DC power supply Vcc, another termination power ground in partial pressure unit one end that device R3 is composed in series；The control of switch element N1
The output end of system termination partial pressure unit is second resistance device R2 and 3rd resistor device R3 series connection nodes, the output of switch element N1
Termination power ground, the control end of switch element N1 controls the conducting between its input and output end；The one of delay capacitor C2
The output end of termination partial pressure unit, another termination power ground；
Described surge restraint circuit also includes that surge protection detects circuit；
Described surge protection detection circuit includes triode V2, transient suppressor V1, a 4th resistor R4, the 5th
Resistor R5；The one termination triode V1 base stages of transient suppressor V1, the other end concatenates the 4th resistor R4 and is followed by described
The input of the switch element N1 in surge protection circuit, the clamp voltage of transient suppressor V1 is less than relay K1 line bags
Supply voltage Vcc, higher than the input terminal voltage of the switch element N1 after conducting；The emitter stage of triode V2 connects power supply ground；Three poles
The colelctor electrode of pipe V2 is connected to auxiliary DC power supply Vcc by the 5th resistor R5, from triode V2 colelctor electrodes and the 5th resistor
Outputs level signals C/S of detection circuit are drawn at R5 connected node, whether is inhaled as surge protection circuit repeat circuit K1
Close, complete the detection signal of Surge suppression function, this signal also can power electricity as DC power output end DCout+, DCout-
The Coordinated Control Signal on road.
Further, between the colelctor electrode and the 5th resistor R5 of the triode V2 in described surge protection detection circuit
Optical coupling isolator is accessed, described C/S signals are exported by optical coupling isolator.
In the technical solution of the utility model, increase existing surge protection circuit surge protection detection circuit, i.e., from wave
The input sampled voltage signal for gushing the switch element N1 in protection circuit detects circuit, the height of this voltage signal to surge protection
The low two kinds of different conditions i.e. contact for representing relay is adhesive or off-state, and through surge protection detection circuit electricity is carried out
Correspondence outwards exports the high and low level signals of C/S after flat turn is changed, so as to late-class circuit just can be high and low according to the signal level of C/S
Change, whether be easily that effective adhesive judges to anti-surge protection circuit repeat circuit, and can be used as chain control
The determination signal whether signal, as late-class circuit power, realizes chain in control.The technical solution of the utility model is fitted
For direct-flow input circuit, in being applied equally to be input into the DC circuit for being exchange after rectified, circuit form is simple, reliable
Higher, the cost economically feasible of property.
Description of the drawings
Fig. 1 is the direct current input anti-surge protection circuit figure that prior art is provided.
Fig. 2 is the circuit diagram that a kind of direct current that the utility model is provided is input into surge restraint circuit.
Another kind of direct current input surge restraint circuit that Fig. 3 the utility model is provided（Isolated form signal output）Circuit
Figure.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage are clearer, it is right below in conjunction with drawings and Examples
The utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain this practicality
It is new, it is not used to limit the utility model.Additionally, involved in the utility model disclosed below each embodiment
As long as technical characteristic do not constitute each other conflict just can be mutually combined.
As shown in Fig. 2 the circuit in dotted line frame is the surge protection detection circuit of direct current input surge restraint circuit.Upper electricity
Afterwards, in the RC delay circuits that the bleeder circuit and delay capacitor C2 that resistor R2 and R3 is composed in series is collectively constituted, C2 two ends electricity
Pressure is slow to be risen, before the turning-on voltage that the pin of control end 1 that C2 both end voltages rise to switch element N1 needs, due to opening
Close the cut-off of unit N1, accessory power supply Vcc, the pin of input 2 of 3 pin of electrical equipment K1 line bags and 4 pin and switch element N1 and defeated
Go out 3 pin of end（GND）Between can not form electric pathway；Resistance value between 3 pin and 4 pin of the line bag of relay K1 is typically equivalent to
Tens of Ohms is to hundreds of ohms, so 2 pin of N1 voltage now is auxiliary power Vcc voltage；Vcc voltage passes through the 4th resistance
Device R4, transient suppressor V1 are sent to the base stage of triode V2, the grounded emitter of triode V2 so that triode V2 saturations are led
Logical, the colelctor electrode of triode V2 is just over the ground the low level of a 0.3V or so；Therefore, when the non-adhesives of relay K1, from this
The output C/S signals that the colelctor electrode of triode V2 is drawn in surging prevention detection circuit are the low level of 0.3V or so.
After the turning-on voltage that the pin of control end 1 that the voltage on C2 two ends rises to switch element N1 needs, the input of N1
Hold and turned between 2 pin and the pin of output end 3, the pin of line bag 3 and 4 pin and 2 pin and 3 pin of N1 of accessory power supply Vcc Jing K1（GND）It
Between form path, now, the voltage of 2 pin of N1 is relatively low level signal；Because transient suppressor V1 is present, the clamper electricity of V1
Pressure is higher than the voltage after switch element N1 conductings so that the level signal of 2 pin of N1 is unable to transient suppressor V1 and punctures conducting,
So, the voltage that the Vbe of triode V2 is just not turned on, V2 is rendered as cut-off state, and the colelctor electrode of V2 is just high level Vcc；
Therefore, after relay K1 adhesives, from the output C/S signals that the colelctor electrode of triode V2 in the surge protection detection circuit is drawn
For high level.
The high and low level change of the C/S signals of circuit is detected by surge protection above, i.e., when surge protection detection electricity
It is the i.e. also non-adhesive of state for disconnecting that the output C/S level signals on road are the low relay that represents at ordinary times, and C/S level signals are Gao Ping
Interval scale relay adhesive, it is possible to judge whether resistor R1 is shorted in surge protection circuit, so as to this C/S letter
Number whether rear class is powered and to be controlled, realized chain in control.
Principle in Fig. 3 with Fig. 2 Suo Shi shown in it is identical, simply C/S signals are sent after light-coupled isolation.Due to defeated
It is by optical coupling isolator isolation and amplifier, so being applied to rear class not altogether in the circuit on ground to go out C/S signals.
As it will be easily appreciated by one skilled in the art that preferred embodiment of the present utility model is the foregoing is only, not
To limit the utility model, all any modifications made within spirit of the present utility model and principle, equivalent and change
Enter, should be included within protection domain of the present utility model.
Claims (2)
1. a kind of direct current is input into surge restraint circuit, including provides input DCin+, DCin- of dc source and for even
Output end DCout+, DCout- of late-class circuit is connect, the wave being connected between the input and output end DCout+, DCout-
Gush protection circuit；
Described surge protection circuit contains first resistor device R1 and filter capacitor C1, relay K1, second resistance device R2 and
Partial pressure unit, delay capacitor C2, switch element N1, auxiliary DC power supply Vcc that three resistor R3 are composed in series, filter capacitor
C1 is accessed between both positive and negative polarity DCin+, DCin- of direct-flow input end, and the negative pole of direct-flow input end is accessed in first resistor device R1 one end
DCin-, the other end accesses the node that filter capacitor C1 is connected with direct-flow input end negative pole DCin-；Two contacts 1 of relay K1
In parallel respectively with 2 to access first resistor device R1 two ends, auxiliary DC power supply Vcc, another termination are accessed in relay K1 line bags one end
Enter the input of switch element N1；Access auxiliary in partial pressure unit one end that second resistance device R2 and 3rd resistor device R3 are composed in series
Help dc source Vcc, another termination power ground；The output end of the control termination partial pressure unit of switch element N1 is second resistance
Device R2 and 3rd resistor device R3 series connection nodes, the output termination power ground of switch element N1, the control end control of switch element N1
Make the conducting between its input and output end；The output end of the one termination partial pressure unit of delay capacitor C2, another termination electricity
Source ground；
Characterized in that, described surge restraint circuit also includes that surge protection detects circuit；
Described surge protection detection circuit includes：One triode V2, transient suppressor V1, the 4th resistor R4, the 5th is electric
Resistance device R5；The one termination triode V1 base stages of transient suppressor V1, the other end concatenates the 4th resistor R4 and is followed by described wave
The input of the switch element N1 in protection circuit is gushed, the clamp voltage of transient suppressor V1 is less than the confession of relay K1 line bags
Piezoelectric voltage Vcc, higher than the input terminal voltage of the switch element N1 after conducting；The emitter stage of triode V2 connects power supply ground；Triode
The colelctor electrode of V2 is connected to auxiliary DC power supply Vcc by the 5th resistor R5, from triode V2 colelctor electrodes and the 5th resistor R5
Outputs level signals C/S of detection circuit are drawn at connected node, as surge protection circuit repeat circuit K1 whether adhesive,
The detection signal of Surge suppression function is completed, this signal also can be used as DC power output end DCout+, DCout- power supply circuits
Coordinated Control Signal.
2. direct current according to claim 1 is input into surge restraint circuit, it is characterised in that：Detect in described surge protection
Optical coupling isolator is accessed between the colelctor electrode and the 5th resistor R5 of the triode V2 in circuit, described C/S signals pass through light
Coupling isolator is exported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621170471.8U CN206164085U (en) | 2016-10-26 | 2016-10-26 | Direct -current input surge suppression circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621170471.8U CN206164085U (en) | 2016-10-26 | 2016-10-26 | Direct -current input surge suppression circuit |
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| Publication Number | Publication Date |
|---|---|
| CN206164085U true CN206164085U (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621170471.8U Expired - Fee Related CN206164085U (en) | 2016-10-26 | 2016-10-26 | Direct -current input surge suppression circuit |
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| CN (1) | CN206164085U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108494238A (en) * | 2018-03-27 | 2018-09-04 | 上海电气分布式能源科技有限公司 | A kind of Power Supply Hot Swap realization circuit device |
| CN109194107A (en) * | 2018-11-20 | 2019-01-11 | 北京汇能精电科技股份有限公司 | A kind of guard method for protecting circuit, photovoltaic inverter and photovoltaic inverter |
| CN109755926A (en) * | 2019-03-22 | 2019-05-14 | 常州市赛尔交通器材有限公司 | Bullet train distribution board and headlamp combined power supply system dash current protective device |
| CN110022053A (en) * | 2019-03-29 | 2019-07-16 | 合肥华耀电子工业有限公司 | It is a kind of to inhibit the three phase rectifier of function to protect circuit with inrush current |
| CN112865050A (en) * | 2019-11-27 | 2021-05-28 | 明纬(广州)电子有限公司 | Adaptive regulation surge current limiter |
| CN112911764A (en) * | 2021-02-02 | 2021-06-04 | 深圳市安普信达软件技术服务有限公司 | LED drive power supply anti-surge system |
-
2016
- 2016-10-26 CN CN201621170471.8U patent/CN206164085U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108494238A (en) * | 2018-03-27 | 2018-09-04 | 上海电气分布式能源科技有限公司 | A kind of Power Supply Hot Swap realization circuit device |
| CN109194107A (en) * | 2018-11-20 | 2019-01-11 | 北京汇能精电科技股份有限公司 | A kind of guard method for protecting circuit, photovoltaic inverter and photovoltaic inverter |
| CN109755926A (en) * | 2019-03-22 | 2019-05-14 | 常州市赛尔交通器材有限公司 | Bullet train distribution board and headlamp combined power supply system dash current protective device |
| CN110022053A (en) * | 2019-03-29 | 2019-07-16 | 合肥华耀电子工业有限公司 | It is a kind of to inhibit the three phase rectifier of function to protect circuit with inrush current |
| CN110022053B (en) * | 2019-03-29 | 2024-03-29 | 合肥华耀电子工业有限公司 | Three-phase rectification protection circuit with input surge current suppression function |
| CN112865050A (en) * | 2019-11-27 | 2021-05-28 | 明纬(广州)电子有限公司 | Adaptive regulation surge current limiter |
| CN112911764A (en) * | 2021-02-02 | 2021-06-04 | 深圳市安普信达软件技术服务有限公司 | LED drive power supply anti-surge system |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170510 |