CN206412761U - A kind of surge protecting circuit and surge protector - Google Patents
A kind of surge protecting circuit and surge protector Download PDFInfo
- Publication number
- CN206412761U CN206412761U CN201621376285.XU CN201621376285U CN206412761U CN 206412761 U CN206412761 U CN 206412761U CN 201621376285 U CN201621376285 U CN 201621376285U CN 206412761 U CN206412761 U CN 206412761U
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- surge
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- circuit
- power supply
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Abstract
The utility model provides a kind of surge protecting circuit and surge protector, by collecting unit collection by the surge signal in protection load supplying or signal line；By processing unit when the surge signal meets default protective condition, trigger signal is generated；Trigger signal loads on the first vent unit, it is ensured that first vent unit can be acted in good time, and the surge in power supply or signal line is released；Surge in power supply or signal line can be then clamped to by the pressure-resistant scope of protection load by the second vent unit.This programme passes through collection and processing procedure, it is ensured that first vent unit can be triggered in good time, solves matching problem between the level between first order vent unit and second level vent unit.
Description
Technical field
The utility model is related to field of circuit technology, more particularly to a kind of surge protecting circuit and surge protector.
Background technology
With continuing to develop for science and technology, electronic equipment has become a part indispensable in daily life.And due to
Thunder and lightning, electronic equipment start and stop or failure and other reasons, can cause the overvoltage of electronic equipment internal moment or excessively stream, and then damage electronics setting
It is standby.Therefore, electronic equipment is protected frequently with surge protector (SPD) at present.
It is a kind of SPD commonly used in the prior art referring to Fig. 1；The SPD includes：Piezo-resistance MOV, gas-discharge tube
GDT, decoupling inductance L and diode TVS；When having induced lightening or other switching overvoltages intrusion power transmission line, gas is put
The first order lightning protection component of fulgurite GDT and piezo-resistance MOV compositions is first turned on, and absorbs most of surge signal；By two poles
The effect of the second level lightning protection component of pipe TVS compositions is the lightning current invaded after small part of releasing, and output port is reduced to greatest extent
The voltage at place, so as to protect electronic equipment being capable of safe operation；But, if two-stage lightning protection component is apart from close, it is possible to the
The also not operating second level lightning protection component of one-level lightning protection component has just been broken, therefore, in order to ensure first order lightning protection component can
Action, when two-stage lightning protection component distance is not remote enough, is generally required between two-stage lightning protection component plus a decoupling inductance L, with
Prevent thunder and lightning it is quick after invade, solve the matching problem between multistage lightning protection component on a circuit.
However, with the increase of load current, the program uses decoupling inductance L sectional area will be while increasing so that
SPD volume is excessive.
Utility model content
In view of this, the utility model provides a kind of surge protecting circuit and surge protector, is realizing surge guarantor
While shield, by surge Signal sampling and processing process, matching problem between the level of multistage link of releasing is solved, circuit can be achieved
Miniaturization Design, and improve the reliability of circuit.
To achieve the above object, the technical scheme that the application is provided is as follows：
A kind of surge protecting circuit, including：
Gather by the collecting unit of surge signal in the power supply of protection load or signal line；
The surge signal that the collecting unit is exported is handled, and the default protection of surge signal satisfaction after treatment
During condition, the processing unit of trigger signal is generated；The input of the processing unit is connected with the output end of the collecting unit；
The power supply powered for the processing unit；
After being triggered by the trigger signal, first that the surge on the power supply or signal line is released and clamped
Vent unit；First vent unit is connected between the power supply or the both threads cable of signal line, and described first releases
The input of discharging gap is connected with the output end of the processing unit in unit；
The surge released on the power supply or signal line, and the surge on the power supply or signal line is clamped to institute
State by the second vent unit in the pressure-resistant scope of protection load；Second vent unit and first vent unit are simultaneously
Connection.
It is preferred that, the processing unit includes：
The signal conditioning circuit nursed one's health the surge signal that the collecting unit is exported, the signal conditioning circuit
Input is connected with the output end of the collecting unit；
When the signal exported in the signal conditioning circuit meets the default protective condition, the control of control signal is generated
Circuit, the input of the control circuit is connected with the output end of the signal conditioning circuit；
According to the control signal, the triggers circuit of the trigger signal is generated；The input of the triggers circuit and institute
The output end for stating control circuit is connected.
It is preferred that, the triggers circuit is：Marx generator, or condenser type energy pre-storage loop, or contain boosting transformation
The boosting loop of device.
It is preferred that, the collecting unit is：Current transformer；The current transformer is arranged at the power supply or signal wire
Lu Shang.
It is preferred that, the collecting unit is：Current transformer；The current transformer is arranged at second vent unit
Branch road on；
The response speed of second vent unit is faster than the response speed of first vent unit.
It is preferred that, first vent unit includes：
Discharging gap branch road；The discharging gap branch road includes a discharging gap, or, the electric discharge that multiple connection in series-parallel are connected
Gap；
Or, the discharging gap branch road and piezo-resistance branch road being connected in series；The discharging gap branch road is put including one
Electric gap, or, the discharging gap that multiple connection in series-parallel are connected；The piezo-resistance branch road includes a piezo-resistance, or, multiple strings
The piezo-resistance being connected in parallel.
It is preferred that, second vent unit is：Diode or piezo-resistance.
It is preferred that, the power supply can also be used to power for the collecting unit.
A kind of surge protector, it is characterised in that be packaged with the surge protecting circuit as described in above-mentioned any one.
From such scheme, the utility model provides a kind of surge protecting circuit, is protected by collecting unit collection
The surge signal protected in load supplying or signal line；Default protective condition is met in the surge signal by processing unit
When, generate trigger signal；Trigger signal loads on the first vent unit, it is ensured that first vent unit can be acted in good time,
Surge in power supply or signal line is released, the reliability of circuit is improved；Second vent unit then can will power supply or
Surge on signal line is clamped to by the pressure-resistant scope of protection load, realizes surge protection.This programme by collection and
Processing procedure, it is ensured that first vent unit can be triggered in good time, solves first order vent unit and the second level and releases list
Matching problem between level between member；And without decoupling inductance between level of the prior art, circuit is realized compared with prior art
Miniaturization Design.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit theory diagrams of surge protector in the prior art；
The structural representation for the surge protecting circuit that Fig. 2 provides for the utility model embodiment；
The part-structure schematic diagram for the surge protecting circuit that Fig. 3 provides for the utility model embodiment；
Another part structural representation for the surge protecting circuit that Fig. 4 provides for the utility model embodiment；
Another part structural representation for the surge protecting circuit that Fig. 5 provides for the utility model embodiment；
Another part structural representation for the surge protecting circuit that Fig. 6 provides for the utility model embodiment；
Another structural representation for the surge protecting circuit that Fig. 7 provides for the utility model embodiment；
Another structural representation for the surge protecting circuit that Fig. 8 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
The utility model provides a kind of surge protecting circuit, while surge protection is realized, is adopted by surge signal
Collection and processing procedure, solve matching problem between the level of multistage link of releasing, the Miniaturization Design of circuit can be achieved, and improve circuit
Reliability.
The surge protecting circuit, referring to Fig. 2, including：Collecting unit 100, processing unit 200, power supply 500, first are released
The vent unit 400 of unit 300 and second；
Specifically annexation is：
Fig. 2 is parallel to by two power supplies of protection load or believed after being connected with collecting unit 100 with the second vent unit 400
It is shown exemplified by between number circuit, but is not necessarily limited to this, can also be arranged at by a power supply of protection load
Or on signal line, depending on its concrete application environment；The output end phase of the input of processing unit 200 and collecting unit 100
Even；First vent unit 300 is connected between two power supplies by protection load or signal line, in the first vent unit 300
The input of discharging gap is connected with the output end of processing unit 200；Second vent unit 400 and the first vent unit 300 are simultaneously
Connection.
What deserves to be explained is, the first vent unit 300 and the second vent unit 400 can be located at same surge protector
It is interior, it can also be located at respectively in connected surge protector, be not specifically limited herein, in the protection domain of the application.
Specifically operation principle is：
Collecting unit 100 is used to gather the surge signal by the power supply of protection load or signal line；Power supply 500 is used for
Powered for processing unit 200；Processing unit 200 is used to handle the surge signal that collecting unit 100 is exported, and in processing
When surge signal afterwards meets default protective condition, trigger signal is generated；First vent unit 300 is used to be touched by the trigger signal
After hair, the surge on the power supply or signal line is released and clamped；Second vent unit 400 be used for release the power supply or
Surge on signal line, and the surge on the power supply or signal line is clamped to this by the pressure-resistant scope of protection load.
The surge protecting circuit that the present embodiment is provided, was causing electricity due to thunder and lightning, load start and stop or failure and other reasons
When stream or the surge signal of overvoltage occur, pass through the collection to the surge signal and processing procedure, it is ensured that first releases list
Member 300 can be triggered in good time, coordinate between the level between solution first order vent unit 300 and second level vent unit 400 and ask
Topic；And without decoupling inductance between level of the prior art, the Miniaturization Design of circuit is realized compared with prior art.
Another embodiment of the utility model additionally provides another surge protecting circuit, on the basis of above-described embodiment
On, referring to Fig. 3, processing unit 200 includes：Signal conditioning circuit 201, control circuit 202 and triggers circuit 203；
Specifically annexation is：
The input of signal conditioning circuit 201 is connected with the output end of collecting unit 100, controls the input of circuit 202
It is connected with the output end of signal conditioning circuit 201, the input of triggers circuit 203 is with controlling the output end of circuit 202 to be connected.
Specifically operation principle is：
Signal conditioning circuit 201 is used to nurse one's health the surge signal that collecting unit 100 is exported；The conditioning can be wrapped
Include：Partial pressure, filtering, amplification and analog-to-digital conversion etc. are operated, and are not specifically limited herein, in the protection domain of the application.
Control circuit 202 is used for when the signal that signal conditioning circuit 201 is exported meets the default protective condition, generation
Control signal；The control signal is used for start triggering circuit 202；
Triggers circuit 202 is used to, according to the control signal, generate the trigger signal；The trigger signal can be one
The pulse signal of high pressure, for triggering the discharging gap in the first vent unit 300.
Specifically, the default protective condition in control circuit 202 can be：The letter that signal conditioning circuit 201 is exported
Number be more than reference voltage signal U0；What reference voltage signal U0 can provide for power supply 500 (referring to Fig. 3, controls circuit 202
It is connected with power supply 500), or the control internal preset of circuit 202；It is not specifically limited herein, the protection model in the application
In enclosing.
In specific practical application, the control circuit 202 can be single-chip microcomputer, be not specifically limited herein, at this
In the protection domain of application.
It is preferred that, triggers circuit 202 is：
Marx generator as shown in Figure 4；
Or, condenser type energy pre-storage loop as shown in Figure 5,
Or, the boosting loop containing step-up transformer as shown in Figure 6.
Referring to Fig. 4, before the Marx generator generates trigger signal according to control signal, plural parallel stage electricity therein
Container has completed charging by the transformer shown in Fig. 4, commutation diode and corresponding charging resistor, realizes energy storage.Due to
The trigger signal voltage of Marx generator output is higher, therefore, it is possible to improve the success rate of triggering.
Referring to Fig. 5, when the signal exported in signal conditioning circuit 201 meets the default protective condition, circuit 202 is controlled
The control signal of generation closes the switch in control figure 5, the electric capacity electric discharge in Fig. 5, forms a high-voltage pulse signal loading
To the first vent unit 300, the triggering for the first vent unit 300 is completed.
Referring to Fig. 6 when the signal that signal conditioning circuit 201 is exported meets the default protective condition, circuit 202 is controlled
The control signal of generation closes the switch in control figure 6, and the primary coil two ends of the step-up transformer in Fig. 6 load an electricity
Pressure value, after the boosting of step-up transformer, forms a high-voltage pulse signal, then is loaded into after over commutation first and releases list
Member 300, completes the triggering for the first vent unit 300.
Fig. 4 to Fig. 6 be only give three kinds of triggers circuits 202 implement form, but be not necessarily limited to this,
It can also be configured, no longer repeated one by one herein according to specific actual conditions, in the protection domain of the application.
Another embodiment of the utility model additionally provides another surge protecting circuit, on the basis of above-described embodiment
On, collecting unit 100 is：Current transformer；
The current transformer can select Rogowski coil or Hall element etc. according to concrete application environment, herein
It is not specifically limited, in the protection domain of the application.
Referring to Fig. 7, the current transformer is arranged on the power supply or signal line.
Or, referring to Fig. 8, the current transformer is arranged on the branch road of the second vent unit 400；
The response speed of second vent unit 400 is faster than the response speed of the first vent unit 300.
Second vent unit 400 can be diode or piezo-resistance；As long as ensureing the device in the second vent unit 400
Part is not specifically limited herein than the fast response time of the first vent unit 100, can regard its concrete application environment and
It is fixed, in the protection domain of the application.
In Fig. 8, the surge signal of overcurrent or overvoltage is being caused to go out due to thunder and lightning, load start and stop or failure and other reasons
Now, fast response time of the device than the first vent unit 100 in the second vent unit 400, surge is released list by second
Member 400 and collecting unit 100, pass through collecting unit 100 and processing unit 200 so that the first vent unit 100 is turned on, and is flowed through
Most of overcurrent in surge；And the second vent unit 400 simply flows through the fraction overcurrent in surge signal, residual voltage meeting
It is clamped in certain scope.
What deserves to be explained is, a processing unit 200 can be used for while multiple bleeders are triggered, that is, above-mentioned reality
It can be that piezo-resistance is connected in series a discharging gap (such as gas puts pipe) to apply the first vent unit 300 in example, can also
Be discharging gap or piezo-resistance using it is multiple it is in parallel by the way of；That is, the first vent unit 300 includes：
Discharging gap branch road；Discharging gap branch road is included between a discharging gap, or, the electric discharge of multiple connection in series-parallel connection
Gap；
Or, the discharging gap branch road and piezo-resistance branch road being connected in series；Discharging gap branch road is included between an electric discharge
Gap, or, the discharging gap that multiple connection in series-parallel are connected；Piezo-resistance branch road includes a piezo-resistance, or, multiple connection in series-parallel connection
Piezo-resistance.
When the first vent unit 300 only includes discharging gap branch road, the surge protecting circuit can be used for protection and receive
The load of Alternating Current Power Supply；When the first vent unit 300 includes the discharging gap branch road and piezo-resistance branch road that are connected in series, lead to
Suitable parameter setting is crossed, the surge protecting circuit can be used for the load that protection receives direct current or Alternating Current Power Supply；Herein not
It is specifically limited, can be depending on its concrete application environment, in the protection domain of the application.
Additionally, it is preferred that, power supply 500 can also be used to power for collecting unit 100.
When collecting unit 100 is also required to extra power supply, same power supply 500 can be used with processing unit 200, also may be used
To use other power supply, it is not specifically limited herein, in the protection domain of the application.
Another embodiment of the utility model additionally provides a kind of surge protector, is packaged with as described in above-mentioned any embodiment
Surge protecting circuit.
Specific annexation and operation principle are same as the previously described embodiments, no longer repeat one by one herein.
The embodiment of each in this specification is described by the way of progressive, what each embodiment was stressed be with it is other
Between the difference of embodiment, each embodiment same or similar part mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can in other embodiments be realized in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (9)
1. a kind of surge protecting circuit, it is characterised in that including：
Gather by the collecting unit of surge signal in the power supply of protection load or signal line；
The surge signal that the collecting unit is exported is handled, and the default protective condition of surge signal satisfaction after treatment
When, generate the processing unit of trigger signal；The input of the processing unit is connected with the output end of the collecting unit；
The power supply powered for the processing unit；
After being triggered by the trigger signal, first that the surge on the power supply or signal line is released and clamped is released
Unit；First vent unit is connected between the power supply or the both threads cable of signal line, first vent unit
The input of middle discharging gap is connected with the output end of the processing unit；
The surge released on the power supply or signal line, and the surge on the power supply or signal line is clamped to the quilt
Protect the second vent unit in the pressure-resistant scope of load；Second vent unit is in parallel with first vent unit.
2. surge protecting circuit according to claim 1, it is characterised in that the processing unit includes：
The signal conditioning circuit nursed one's health the surge signal that the collecting unit is exported, the input of the signal conditioning circuit
End is connected with the output end of the collecting unit；
When the signal exported in the signal conditioning circuit meets the default protective condition, the control electricity of control signal is generated
Road, the input of the control circuit is connected with the output end of the signal conditioning circuit；
According to the control signal, the triggers circuit of the trigger signal is generated；The input of the triggers circuit and the control
The output end of circuit processed is connected.
3. surge protecting circuit according to claim 2, it is characterised in that the triggers circuit is：Marx generator,
Or condenser type energy pre-storage loop, or the boosting loop containing step-up transformer.
4. surge protecting circuit according to claim 1, it is characterised in that the collecting unit is：Current transformer；Institute
Current transformer is stated to be arranged on the power supply or signal line.
5. surge protecting circuit according to claim 1, it is characterised in that the collecting unit is：Current transformer；Institute
Current transformer is stated to be arranged on the branch road of second vent unit；
The response speed of second vent unit is faster than the response speed of first vent unit.
6. according to any described surge protecting circuit of claim 1 to 5, it is characterised in that first vent unit includes：
Discharging gap branch road；The discharging gap branch road is included between a discharging gap, or, the electric discharge of multiple connection in series-parallel connection
Gap；
Or, the discharging gap branch road and piezo-resistance branch road being connected in series；The discharging gap branch road is included between an electric discharge
Gap, or, the discharging gap that multiple connection in series-parallel are connected；The piezo-resistance branch road includes a piezo-resistance, or, multiple connection in series-parallel
The piezo-resistance of connection.
7. according to any described surge protecting circuit of claim 1 to 5, it is characterised in that second vent unit is：Two
Pole pipe or piezo-resistance.
8. according to any described surge protecting circuit of claim 1 to 5, it is characterised in that the power supply can be additionally used in for institute
Collecting unit is stated to power.
9. a kind of surge protector, it is characterised in that be packaged with surge protection as claimed in any of claims 1 to 8 in one of claims
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621376285.XU CN206412761U (en) | 2016-12-14 | 2016-12-14 | A kind of surge protecting circuit and surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621376285.XU CN206412761U (en) | 2016-12-14 | 2016-12-14 | A kind of surge protecting circuit and surge protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206412761U true CN206412761U (en) | 2017-08-15 |
Family
ID=59550869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621376285.XU Withdrawn - After Issue CN206412761U (en) | 2016-12-14 | 2016-12-14 | A kind of surge protecting circuit and surge protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206412761U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532673A (en) * | 2016-12-14 | 2017-03-22 | 四川中光防雷科技股份有限公司 | Surge protection circuit and surge protection device |
-
2016
- 2016-12-14 CN CN201621376285.XU patent/CN206412761U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532673A (en) * | 2016-12-14 | 2017-03-22 | 四川中光防雷科技股份有限公司 | Surge protection circuit and surge protection device |
| CN106532673B (en) * | 2016-12-14 | 2019-01-15 | 四川中光防雷科技股份有限公司 | A kind of surge protecting circuit and surge protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170815 Effective date of abandoning: 20190115 |
|
| AV01 | Patent right actively abandoned |