CN205829161U - A kind of surge protection circuit and Surge Protector - Google Patents
A kind of surge protection circuit and Surge Protector Download PDFInfo
- Publication number
- CN205829161U CN205829161U CN201620681029.5U CN201620681029U CN205829161U CN 205829161 U CN205829161 U CN 205829161U CN 201620681029 U CN201620681029 U CN 201620681029U CN 205829161 U CN205829161 U CN 205829161U
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- circuit
- discharge tube
- surge protection
- gas
- varistor
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Abstract
This utility model provides a kind of surge protection circuit, including: varistor, gas-discharge tube, transient diode, booster circuit and rectification circuit.Gather the electric current of transient diode by booster circuit and produce a high voltage, then, this high voltage rectifier is become to trigger the trigger high voltage of gas-discharge tube by rectification circuit, to trigger gas-discharge tube conducting, it is achieved the instantaneous large-currents such as thunder and lightning are released by piezoresistor series connection gas-discharge tube branch road.Visible; use this programme; when lightning current impacts; transient diode fast response time, while part of releasing lightning current, gather its electric current by boosting, rectification circuit trigger varistor series connection gas-discharge tube branch road release major part lightning current; and this programme does not uses inductance; circuit volume is little, and avoids the energy consumption of inductance so that the lower power consumption of whole surge protection circuit.Except this, transient diode has the effect of clamp voltage, can effectively reduce the restriction voltage of Surge Protector.
Description
Technical field
This utility model relates to circuit engineering field, particularly relates to a kind of surge protection circuit and Surge Protector.
Background technology
Along with the development of science and technology, electronic equipment has become as a part indispensable in daily life.And due to
Thunder and lightning, electronic equipment start and stop or failure and other reasons, can cause electronic equipment internal moment overvoltage or cross stream, and then burning electronics and set
Standby.
At present, frequently with Surge Protector, electronic equipment is protected.As it is shown in figure 1, respectively illustrate traditional wave
The circuit diagram of surge protector (SPD), Fig. 1 a be the SPD circuit diagram of conventional parallel type, Fig. 1 b and Fig. 1 c be conventional serial type
SPD circuit diagram.Now as a example by Fig. 1 c, introduce the operation principle of existing SPD.
This surge protection circuit includes varistor MOV, gas-discharge tube GDT, inductance L and transient diode TVS, its
In, the branch circuit parallel connection after varistor MOV connects with gas-discharge tube GDT is connected to the two ends of supply port (+,-), inductance L
Connect with electronic equipment, and electronic equipment is in parallel with transient diode TVS.
When having induced lightening or other switching overvoltage invades power transmission line, gas-discharge tube GDT and varistor
The first order lightning protection component of MOV composition first turns on, and absorbs major part surging signal；The effect of inducer L is to stop thunder and lightning
Quick after invade；The effect of the second level lightning protection component being made up of TVS is the lightning current invaded after small part of releasing, and drops to greatest extent
Voltage at low output port, thus protect the safe operation of electronic equipment.
But, inventor finds, along with the increase of load current, and the increase of the sectional area of used inductance and also resulting in
Increase is the most also followed in internal resistance so that power consumption and the volume of Surge Protector all increase.
Utility model content
In view of this, this utility model provides a kind of surge protection circuit and Surge Protector, protects realizing surge
While protecting, circuit volume is little, low in energy consumption.
In view of this, this utility model provides a kind of surge protection circuit, including: varistor, gas-discharge tube, wink
State diode, booster circuit and rectification circuit；
First end of described varistor respectively with the input anode and one end of described transient diode of external power supply
It is connected, and as the output plus terminal of described surge protection circuit；
Second end of described varistor defeated with the input of described gas-discharge tube and described rectification circuit respectively
Go out end to be connected；
The other end of described transient diode is connected with the input of described booster circuit；
The outfan of described booster circuit is connected with the input of described rectification circuit；
The outfan of described gas-discharge tube is connected with the input negative terminal of described external power supply, and as described surge protection
The output negative terminal of circuit；
Described booster circuit gathers the electric current of described transient diode and produces a high voltage, and described rectification circuit is by described
High voltage rectifier becomes trigger high voltage, described trigger high voltage to make described gas-discharge tube turn on.
Preferably, described booster circuit includes that transformator, described transformator include primary side winding and vice-side winding, and institute
State the quantity quantity more than described primary side winding of vice-side winding；
The primary side winding of described transformator is connected with described transient diode.
Described transient diode includes unidirectional transient diode and two-way transient diode, and described transient diode includes one
Individual transient diode or multiple transient diode be in parallel or multiple transient diode series connection or multiple transient diode is in parallel and
It is composed in series.
The two ends of the vice-side winding of described transformator are as the outfan of described booster circuit.
Preferably, described rectification circuit includes rectifier bridge,
The input of described rectifier bridge is connected with the outfan of described transformator, the outfan of described rectifier bridge and described gas
The input of body discharge tube is connected.
Preferably, described rectifier bridge is full-bridge rectification bridge.
Preferably, also including: the varistor group in parallel with described varistor, described varistor group at least includes one
Individual varistor.
Preferably, described rectification circuit includes rectifier bridge and pull-up current-limiting circuit,
First end of described rectifier bridge is connected with the outfan of described gas-discharge tube by described pull-up current-limiting circuit, institute
One end of the second end and the vice-side winding of described transformator of stating rectifier bridge is connected, the 3rd end of described rectifier bridge and described transformation
The other end of the vice-side winding of device is connected, and the outfan of described rectifier bridge is connected with the input of described gas-discharge tube.
Preferably, described pull-up current-limiting circuit at least includes a pull-up current-limiting resistance.
Preferably, described pull-up current-limiting circuit includes diode and resistance, and gas described in the anode of described diode is put
The outfan of fulgurite is connected, and the negative electrode of described diode is connected with the first end of described rectifier bridge by described resistance.
Preferably, described rectification circuit also includes drop-down current-limiting circuit,
First end of described rectifier bridge is connected with the first end of described varistor by described drop-down current-limiting circuit.
A kind of Surge Protector, is packaged with the surge protection circuit that any one is above-mentioned.
From such scheme, this utility model provides a kind of surge protection circuit, including: varistor, gas are put
Fulgurite, transient diode, booster circuit and rectification circuit.Gather the electric current of transient diode by booster circuit and produce one
High voltage, then, this high voltage rectifier is become to trigger the trigger high voltage of gas-discharge tube by rectification circuit, in order to trigger gas
Discharge tube turns on, it is achieved the instantaneous large-currents such as thunder and lightning are released by piezoresistor series connection gas-discharge tube branch road.Visible, use
This programme, when lightning current impacts, transient diode fast response time, while part of releasing lightning current, gather its electric current and lead to
Cross boosting, major part lightning current released by rectification circuit triggering varistor series connection gas-discharge tube branch road, and this programme does not uses
Inductance, circuit volume is little, and avoids the energy consumption of inductance so that the lower power consumption of whole surge protection circuit.Except this, this programme
Middle transient diode has the effect of clamp voltage, can effectively reduce the restriction voltage of Surge Protector.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only
It is embodiments more of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work
Under, it is also possible to other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 a is the circuit theory diagrams of Surge Protector in prior art；
Fig. 1 b is the circuit theory diagrams of another kind of Surge Protector in prior art；
Fig. 1 c is the circuit theory diagrams of another Surge Protector in prior art；
The circuit theory analysis chart of a kind of surge protection circuit that Fig. 2 provides for this utility model embodiment；
The circuit theory diagrams of a kind of surge protection circuit that Fig. 3 provides for this utility model embodiment；
The circuit theory diagrams of another surge protection circuit that Fig. 4 provides for this utility model embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise
The every other embodiment obtained, broadly falls into the scope of this utility model protection.
Embodiment one
As in figure 2 it is shown, the circuit theory diagrams of a kind of surge protection circuit provided for this utility model embodiment, this surge
Protection circuit includes: varistor MOV, gas-discharge tube GDT, transient diode TVS, booster circuit 10 and rectification circuit
20。
The annexation of each device is:
First end of varistor MOV respectively with the input anode of external power supply (in Fig. 2 In side+end) and transient state two
One end of pole pipe TVS is connected, and as the output plus terminal of surge protection circuit.Second end of varistor MOV respectively with gas
The input of discharge tube GDT and the outfan of rectification circuit 20 are connected.The other end of transient diode TVS and booster circuit 10
Input be connected.The outfan of booster circuit 10 is connected with the input of rectification circuit 20.The outfan of gas-discharge tube GDT
It is connected with the input negative terminal of external power supply (in Fig. 2 In side-end), and as the output negative terminal of surge protection circuit.
Its operation principle is:
When lightning current impacts, transient diode fast response time, while part of releasing lightning current, passes through booster circuit
Gathering the electric current of transient diode and produce a high voltage, then, this high voltage rectifier is become to trigger gas by rectification circuit puts
The trigger high voltage of fulgurite, in order to trigger gas-discharge tube conducting, it is achieved the instantaneous large-currents such as thunder and lightning pass through piezoresistor string
Connection gas-discharge tube branch road is released.And this programme does not uses inductance, circuit volume is little, and avoids the energy consumption of inductance so that whole
The lower power consumption of individual surge protection circuit.Except this, in this programme, transient diode has the effect of clamp voltage, can effectively drop
The low restriction voltage of Surge Protector.
Embodiment two
On the basis of above-described embodiment, the surge protecting circuit that the present embodiment provides, also include and described varistor
Varistor group in parallel, described varistor group at least includes a varistor.In the present embodiment, varistor group is adopted
With three resistance in parallel, i.e. RV1, RV2 and RV3 in Fig. 3.
More specific, the present embodiment rectification circuit can also be rectifier bridge and the circuit knot of pull-up current-limiting circuit composition
Structure.
It should be noted that in the present embodiment, transient diode uses unidirectional transient diode.
Its circuit connecting relation is:
First end of described rectifier bridge is connected with the outfan of described gas-discharge tube by described pull-up current-limiting circuit, institute
One end of the second end and the vice-side winding of described transformator of stating rectifier bridge is connected, the 3rd end of described rectifier bridge and described transformation
The other end of the vice-side winding of device is connected, and the outfan of described rectifier bridge is connected with the input of described gas-discharge tube.
In the present embodiment, pull-up current-limiting circuit at least includes a pull-up resistor.In fig. 3 it is shown that use three
The example of pull-up resistor, i.e. R1, R2 and R3 series connection.It should be noted that the present embodiment does not limit the number of pull-up resistor,
Can be one, two or more.
Its operation principle is:
At lightning current by moment, transient diode VD1 fast response time, first turn on, be connected on transient diode VD1
The primary side winding of transformator quickly sense the electric current flow through, vice-side winding will produce a high voltage, whole by full-bridge
After stream, produce the trigger high voltage of a high potential, trigger gas-discharge tube V1 conducting, so that varistor RV1, varistor
The branch road of R2 and varistor R3 series connection gas-discharge tube V1 is released major part lightning current, and transient diode VD1 branch road is simply
Flow through fraction electric current and by residual voltage clamper to certain scope, effectively reduce the restriction voltage of Surge Protector.And
And this programme does not uses inductance, circuit volume is little, and avoids the energy consumption of inductance so that the power consumption fall of whole surge protection circuit
Low.
Embodiment three
The present embodiment is on the basis of embodiment two, is changed, the structure of pull-up current-limiting circuit in this enforcement
In example, as shown in Figure 4, pull-up current-limiting circuit includes diode and current-limiting resistance, and gas described in the anode of described diode is put
The outfan of fulgurite is connected, and the negative electrode of described diode is connected with the first end of described rectifier bridge by described resistance.
Embodiment adds drop-down current-limiting circuit.Concrete, drop-down current-limiting circuit includes diode and current-limiting resistance,
First end of varistor described in the anode of described diode is connected, and the negative electrode of described diode is whole with described by described resistance
First end of stream bridge is connected.
It should be noted that in the present embodiment, transient diode uses two-way transient diode.
Its operation principle is identical with embodiment two, for:
At lightning current by moment, transient diode VD1 fast response time, first turn on, be connected on transient diode VD1
The primary side winding of transformator quickly sense the electric current flow through, vice-side winding will produce a high voltage, whole by full-bridge
After stream, produce the trigger high voltage of a high potential, trigger gas-discharge tube V1 conducting, so that varistor RV1, varistor
The branch road of R2 and varistor R3 series connection gas-discharge tube V1 is released major part lightning current, and transient diode VD1 branch road is simply
Flow through fraction electric current and by residual voltage clamper to certain scope, effectively reduce the restriction voltage of Surge Protector.And
And this programme does not uses inductance, circuit volume is little, and avoids the energy consumption of inductance so that the power consumption fall of whole surge protection circuit
Low.
In sum: this utility model provides a kind of surge protection circuit, including varistor, gas-discharge tube, wink
State diode, booster circuit and rectification circuit.Gather the electric current of transient diode by booster circuit and produce a high voltage,
Then, this high voltage rectifier is become to trigger the trigger high voltage of gas-discharge tube by rectification circuit, in order to trigger gas-discharge tube
Conducting, it is achieved the instantaneous large-currents such as thunder and lightning are released by piezoresistor series connection gas-discharge tube branch road.Visible, use we
Case, when lightning current impacts, transient diode fast response time, while part of releasing lightning current, gather its electric current by rising
Press, major part lightning current released by rectification circuit triggering varistor series connection gas-discharge tube branch road, and this programme does not uses inductance,
Circuit volume is little, and avoids the energy consumption of inductance so that the lower power consumption of whole surge protection circuit.Except this, wink in this programme
State diode has the effect of clamp voltage, can effectively reduce the restriction voltage of Surge Protector.
In this specification, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment, same or similar part sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses this practicality new
Type.Multiple amendment to these embodiments will be apparent from for those skilled in the art, is determined herein
The General Principle of justice can realize in the case of without departing from spirit or scope of the present utility model in other embodiments.Cause
This, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (10)
1. a surge protection circuit, it is characterised in that including: varistor, gas-discharge tube, transient diode, rises piezoelectricity
Road and rectification circuit；
First end of described varistor is connected with the input anode of external power supply and one end of described transient diode respectively,
And as the output plus terminal of described surge protection circuit；
Second end of described varistor respectively with the input of described gas-discharge tube and the outfan of described rectification circuit
It is connected；
The other end of described transient diode is connected with the input of described booster circuit；
The outfan of described booster circuit is connected with the input of described rectification circuit；
The outfan of described gas-discharge tube is connected with the input negative terminal of described external power supply, and as described surge protection circuit
Output negative terminal；
Described booster circuit gathers the electric current of described transient diode and produces a high voltage, and described rectification circuit is by described high electricity
Pressure is rectified into trigger high voltage, and described trigger high voltage makes described gas-discharge tube turn on.
Surge protection circuit the most according to claim 1, it is characterised in that described booster circuit includes transformator, described
Transformator includes primary side winding and vice-side winding, and the quantity of described vice-side winding is more than the quantity of described primary side winding；
The primary side winding of described transformator is connected with described transient diode,
The two ends of the vice-side winding of described transformator are as the outfan of described booster circuit.
Surge protection circuit the most according to claim 2, it is characterised in that described rectification circuit includes rectifier bridge,
The input of described rectifier bridge is connected with the outfan of described transformator, and the outfan of described rectifier bridge is put with described gas
The input of fulgurite is connected.
Surge protection circuit the most according to claim 3, it is characterised in that described rectifier bridge is full-bridge rectification bridge.
Surge protection circuit the most according to claim 1, it is characterised in that also include: in parallel with described varistor
Varistor group, described varistor group at least includes a varistor.
Surge protection circuit the most according to claim 2, it is characterised in that described rectification circuit include rectifier bridge and on
Draw current-limiting circuit,
First end of described rectifier bridge is connected with the outfan of described gas-discharge tube by described pull-up current-limiting circuit, described whole
Second end of stream bridge is connected with one end of the vice-side winding of described transformator, the 3rd end of described rectifier bridge and described transformator
The other end of vice-side winding is connected, and the outfan of described rectifier bridge is connected with the input of described gas-discharge tube.
Surge protection circuit the most according to claim 6, it is characterised in that described pull-up current-limiting circuit at least includes one
Pull-up current-limiting resistance.
Surge protection circuit the most according to claim 6, it is characterised in that described pull-up current-limiting circuit include diode with
And resistance, the outfan of gas-discharge tube described in the anode of described diode is connected, and the negative electrode of described diode passes through described electricity
Resistance is connected with the first end of described rectifier bridge.
Surge protection circuit the most according to claim 6, it is characterised in that described rectification circuit also includes drop-down current limliting electricity
Road,
First end of described rectifier bridge is connected with the first end of described varistor by described drop-down current-limiting circuit.
10. a Surge Protector, it is characterised in that encapsulation is just like the surge protection described in any one in claim 1-9
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620681029.5U CN205829161U (en) | 2016-06-29 | 2016-06-29 | A kind of surge protection circuit and Surge Protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620681029.5U CN205829161U (en) | 2016-06-29 | 2016-06-29 | A kind of surge protection circuit and Surge Protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205829161U true CN205829161U (en) | 2016-12-21 |
Family
ID=57567668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620681029.5U Withdrawn - After Issue CN205829161U (en) | 2016-06-29 | 2016-06-29 | A kind of surge protection circuit and Surge Protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205829161U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159926A (en) * | 2016-06-29 | 2016-11-23 | 四川中光防雷科技股份有限公司 | A kind of surge protection circuit and Surge Protector |
| WO2020038119A1 (en) * | 2018-08-20 | 2020-02-27 | 成都铁达电子股份有限公司 | Novel anti-lightning and over-voltage protection circuit and protection apparatus |
-
2016
- 2016-06-29 CN CN201620681029.5U patent/CN205829161U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159926A (en) * | 2016-06-29 | 2016-11-23 | 四川中光防雷科技股份有限公司 | A kind of surge protection circuit and Surge Protector |
| WO2018000791A1 (en) * | 2016-06-29 | 2018-01-04 | 四川中光防雷科技股份有限公司 | Surge protection circuit and surge protective device |
| WO2020038119A1 (en) * | 2018-08-20 | 2020-02-27 | 成都铁达电子股份有限公司 | Novel anti-lightning and over-voltage protection circuit and protection apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161221 Effective date of abandoning: 20190115 |
|
| AV01 | Patent right actively abandoned |