CN208782480U - A kind of surging protection circuit - Google Patents
A kind of surging protection circuit Download PDFInfo
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- CN208782480U CN208782480U CN201821557189.4U CN201821557189U CN208782480U CN 208782480 U CN208782480 U CN 208782480U CN 201821557189 U CN201821557189 U CN 201821557189U CN 208782480 U CN208782480 U CN 208782480U
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Abstract
The utility model discloses a kind of surging protection circuits, belong to field of circuit technology, including rectification circuit, the rectification circuit includes rectifier bridge and the energy storage filter capacitor being in parallel with rectification bridge output end, the input terminal of rectification circuit has also concatenated self-recovery fuse, the output end of rectification circuit TVS pipe also in parallel.The input terminal of the rectifier bridge also and has connect pi type filter, can reduce power supply feedback to input ripple.The output end of rectifier bridge also and has connect a bleeder resistance, load disconnect when it can consume the charge stored in capacitor.The utility model realizes the two-in-one effect of rectification and surge absoption, and compared in the past that rectification circuit and surging protection circuit is separated design method, this programme is more advantageous to circuit realization and PCB layout, and then saves cost.
Description
Technical field
The utility model belongs to field of circuit technology, and in particular to a kind of surging protection circuit.
Background technique
Moment is connected in circuit power or can be generated in the case where exception occurs in circuit much larger than circuit steady-state current
Peak point current or overload current, this is referred to as surge.Surge can bringing on a disaster property harm and accumulation property harm, an electricity
Voltage is gushed from the ability to bear for being more than equipment, then this equipment is totally disrupted or the service life substantially reduces；Multiple small surge accumulations
Effect will cause performance of semiconductor device decline, equipment hair failure and shortened equipment life, finally result in halt production or production
The decline of power.
There are a variety of surge protective devices on the market at present, for example, Transient Suppression Diode (TVS), varistor (MOV),
Ceramic gas discharge tube (DDT), glass discharge vessel (SPG) etc..It is emerged one after another using the circuit that these devices are designed, performance
Quality is different.Currently, generally rectification circuit and surging protection circuit are separately designed in conjunction with carrying out using but such in the industry
Implementation causes circuit structure complex, and circuit is realized and PCB layout difficulty increases, and cost is also higher.Therefore, how
Circuit design and cost factor are taken into account, the relatively high surge absorbing circuit of a cost performance and stability is designed, becomes wide
The new target of big Electronics Engineer.
Summary of the invention
The purpose of this utility model is that: a kind of surging protection circuit is provided, surging protection circuit in the prior art is solved
The problem of structure is realized complexity, higher cost, is had a single function.
The technical solution adopted in the utility model is as follows:
A kind of surging protection circuit, it is characterised in that: including rectification circuit, the rectification circuit include rectifier bridge and with
The energy storage filter capacitor that rectification bridge output end is in parallel, it is characterised in that: the input terminal of the rectification circuit has also been concatenated from extensive
Double insurance silk, the output end of rectification circuit TVS pipe also in parallel.
Further, the input terminal of the rectifier bridge also and is connected to pi type filter, and the self-recovery fuse is serially connected in π
The input terminal of mode filter.
Further, the pi type filter includes diplopore inductance and is attempted by diplopore inductance input terminal and defeated respectively
The capacitor of outlet.
Further, the energy storage filter capacitor quantity is three.
Further, the rectification circuit output end also and has connect a resistance.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are:
1. in the utility model, being modified on the basis of traditional full-wave rectifying circuit, in the input terminal of rectifier bridge
A self-recovery fuse is concatenated.When line failure or overload, self-recovery fuse becomes high-impedance state, work electricity
Stream is reduced rapidly, and then circuit is limited and protected.After troubleshooting, self-recovery fuse reverts to low-resistance shape
State, circuit revert to normal operating conditions.Rectification bridge output end also and has connect energy storage filter capacitor and TVS pipe, rectifier bridge with
And energy storage filter capacitor ensure that the filter effect of circuit, TVS pipe can absorb high-frequency impulse impact, protection load.This is practical
It is novel to realize rectification and the two-in-one effect of carrying out surge protection, reduce the difficulty of circuit realization, PCB layout, overall cost energy
Enough reduce by 10%.
2. in the utility model, also and it is connected to pi type filter in the input terminal of rectifier bridge, pi type filter can reduce electricity
Feed back the ripple to input terminal in source, moreover it is possible to filter out high frequency spikes, help is played to carrying out surge protection process.
3. in the utility model, rectifier bridge output end and connect three energy storage filter capacitors, one is electrolytic capacitor,
Enable to pulsation, in addition two of them ceramic condenser its capacity one big one smoothened containing jagged and ripple direct current
Small, in difference filtering circuit low frequency and high-frequency noise.
4. in the utility model, the output end of rectifier bridge also and has connect a bleeder resistance, removes suddenly in backend load
When, can release the charge for consuming and storing in capacitor, play a protective role to circuit.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the utility model surging protection circuit schematic diagram.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention, i.e., described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is logical
The component for the embodiment of the present invention being often described and illustrated herein in the accompanying drawings can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
It should be noted that the relational terms of term " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described
There is also other identical elements in the process, method, article or equipment of element.
A kind of surging protection circuit realizes complexity, higher cost, function for surging protection circuit structure in the prior art
Single problem, it is characterised in that: including be attempted by incoming line rectifier bridge, be serially connected in rectifier bridge input terminal and can resist
The self-recovery fuse of dash current, the energy storage filter capacitor for being attempted by rectification bridge output end and high-frequency percussion can be absorbed
TVS pipe.The input terminal of the rectifier bridge also and has connect pi type filter, can reduce ripple and filter of the power supply feedback to input
Except high frequency spikes, help is played for the absorption of surging signal.The output end of rectifier bridge also and has connect a bleeder resistance, negative
It can consume the charge stored in capacitor when load disconnects.The utility model carries out on the basis of traditional full-wave rectifying circuit
Modification, in the input terminal of rectifier bridge has concatenated a self-recovery fuse, also and has connect energy storage filtering in rectification bridge output end
Capacitor and TVS pipe, rectifier bridge and energy storage filter capacitor ensure that the filter effect of circuit, self-recovery fuse and TVS pipe
Surge impact can effectively be resisted by matching, protection load.The utility model will be rectified and be combined with carrying out surge protection, compared to
Rectification circuit is separately designed with surging protection circuit in traditional scheme, is realized in circuit, it is undoubtedly more succinct on PCB layout,
Cost can also be effectively reduced simultaneously, and overall cost reduces by 10.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
A kind of surging protection circuit that present pre-ferred embodiments provide, as shown in Figure 1, including being attempted by incoming line
Rectifier bridge, be serially connected in rectifier bridge input terminal self-recovery fuse, be attempted by the energy storage filter capacitor of rectification bridge output end with
And TVS pipe, specifically: on incoming line and it is connected to GBU4K rectifier bridge Q1, the input terminal of rectifier bridge is parallel with by two
The pi type filter of MKP62 222K275 safety capacitor C1, C2 and 8801 diplopore inductance L composition, C1, C2 are electric with diplopore respectively
Input terminal and the output end for feeling L are in parallel, and the input terminal of pi type filter has also concatenated RUEF500 30V 5A self-recovery fuse
F1.The pi type filter can reduce power supply feedback to the ripple of input terminal, can also filter out high frequency when surging signal arrives
Spike, self-recovery fuse can be transformed to high-impedance state when short circuit or overload occur for route, so that operating current subtracts rapidly
It is small, to be limited circuit and be protected.After troubleshooting, self-recovery fuse can revert to low resistive state, in turn
Circuit is set to return normal operating conditions.The output end of the rectifier bridge has simultaneously met three energy storage filter capacitor C3, C4, C5, wherein
C4 is 104/50V capacitor, C5 is 102/50V capacitor, C4, C5 small one and large one filter out low frequency and high-frequency noise respectively.C3 be 330 μ/
35V electrolytic capacitor, capacitance is larger, and the pulsating direct current after capable of rectifying rectifier bridge becomes smooth direct current.The rectifier bridge
Output end also and be connected to 1.5KE24A TVS pipe D and 104 resistance R1.TVS pipe can absorb high-frequency impulse impact, Jin Erbao
Shield load, resistance R1 can consume the charge of capacitor storage when loading and disconnecting, protect circuit.The utility model is traditional complete
It is modified on the basis of wave rectification circuit, a self-recovery fuse has been concatenated in the input terminal of rectifier bridge, in rectifier bridge
Output end also and has connect energy storage filter capacitor and TVS pipe, and rectifier bridge and energy storage filter capacitor ensure that the filtering effect of circuit
Fruit, self-recovery fuse is matched with TVS pipe can effectively resist surge impact, protection load.The utility model will rectify
It combines with carrying out surge protection, separately designs rectification circuit with surging protection circuit compared in traditional scheme, realized in circuit,
It is undoubtedly more succinct on PCB layout, while cost can also be effectively reduced, overall cost reduces by 10.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (5)
1. a kind of surging protection circuit, including rectification circuit, the rectification circuit includes rectifier bridge Q1 and defeated with rectifier bridge Q1
The energy storage filter capacitor that outlet is in parallel, it is characterised in that: the input terminal of the rectification circuit has also concatenated self-recovery fuse
F1, the output end of rectification circuit TVS pipe D also in parallel.
2. a kind of surging protection circuit according to claim 1, it is characterised in that: the input terminal of the rectifier bridge Q1 is also simultaneously
It is connected to pi type filter, the self-recovery fuse F1 is serially connected in the input terminal of pi type filter.
3. a kind of surging protection circuit according to claim 2, it is characterised in that: the pi type filter includes diplopore electricity
Sense L and the capacitor C1 and C2 for being attempted by diplopore inductance input terminal and output end respectively.
4. a kind of surging protection circuit according to claim 1, it is characterised in that: the energy storage filter capacitor quantity is three
It is a.
5. a kind of surging protection circuit according to claim 1, it is characterised in that: the rectification circuit output end is also in parallel
One resistance R1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821557189.4U CN208782480U (en) | 2018-09-21 | 2018-09-21 | A kind of surging protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821557189.4U CN208782480U (en) | 2018-09-21 | 2018-09-21 | A kind of surging protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208782480U true CN208782480U (en) | 2019-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821557189.4U Active CN208782480U (en) | 2018-09-21 | 2018-09-21 | A kind of surging protection circuit |
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| Country | Link |
|---|---|
| CN (1) | CN208782480U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987708A (en) * | 2019-05-21 | 2020-11-24 | 施耐德电气It公司 | Surge protection circuit with integrated monitoring function |
-
2018
- 2018-09-21 CN CN201821557189.4U patent/CN208782480U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987708A (en) * | 2019-05-21 | 2020-11-24 | 施耐德电气It公司 | Surge protection circuit with integrated monitoring function |
| CN111987708B (en) * | 2019-05-21 | 2023-11-03 | 施耐德电气It公司 | Surge protection circuit with integrated monitoring function |
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