CN207926177U - A kind of lightning stroke absorbing circuit - Google Patents
A kind of lightning stroke absorbing circuit Download PDFInfo
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- CN207926177U CN207926177U CN201721513477.5U CN201721513477U CN207926177U CN 207926177 U CN207926177 U CN 207926177U CN 201721513477 U CN201721513477 U CN 201721513477U CN 207926177 U CN207926177 U CN 207926177U
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Abstract
The utility model is related to a kind of lightning stroke absorbing circuits, including level-one inhales wave circuit, two level inhales wave circuit, three-level inhales wave circuit；The input terminal that the level-one inhales wave circuit is circuit input end,The output end that level-one inhales wave circuit is electrically connected with the input terminal of two level suction wave circuit,The output end that two level inhales wave circuit is electrically connected with the input terminal of three-level suction wave circuit,The output end that three-level inhales wave circuit is circuit output end,The lightning stroke absorbing circuit,Do not increase component excessively in original circuit topological structure,Do not lose electric property,Too many cost is not increased,This performance is done using primary circuit architectural characteristic,The lightning stroke absorbing circuit,Circuit is simple,Core is to constitute gradually to decay plus suction wave element varistor using the element in the EMC structures in primary circuit to absorb to control its energy level,So greatly reducing the effect of circuit cost and absorption,Reliability is also improved,Cost and effect are all significantly improved compared with traditional input single-stage absorption circuit.
Description
Technical field
The utility model belongs to lightning protection circuit technical field, and in particular to a kind of lightning stroke absorbing circuit.
Background technology
Requirement of the LED lamp to driving power has the following：
A. the high anti-lightning requirement of client.
B. inexpensive demand
C. the requirement of regulation：Such as IEC61000-4-5.
For a long time, the lamps and lanterns products such as tengsten lamp, the energy-saving lamp that traditional lighting uses are because light efficiency is poor, short life, is not easy intelligence
The problems such as energyization (intelligence is than of high cost), is gradually replaced by emerging LED lamp.
And world today's scarcity of resources, the time of mankind's activity are increasingly longer, it is also higher and higher to rely on illumination.With
The time lengthening of illumination, higher requirements are also raised for reliability and service life to illuminator, the time lengthening of illumination
Imply business, industry and services rise and prosperity, everything activity all mix countless electronic equipments and lamps and lanterns with
Mankind's activity on-line operation and use, the electromagnetic problem interfered with each other and unstable power grid have been consequently increased in power grid
Voltage, it is even more serious in less developed country and area.Because of On-line Product long operational time, power grid incurs the general of nature thunder and lightning
Rate also increases therewith, and outdoor products are even more so, and the data reacted through power grid enterprises are shown, the bad original of the product run outdoors
Because 70% from broken by lightning.
Fig. 1 is existing input single-stage lightning stroke absorbing circuit figure, and the element of the undamped energy of this circuit because is lightning stroke 2KV
It is all highly difficult.
Fig. 2 is existing input single-stage lightning stroke absorbing circuit block diagram, the element of the undamped energy of this circuit because, but because increasing
Discharge tube, can select the varistor anti-lightning ability of low-voltage and high-current to be improved, but component value also to select it is larger
Could effect, and cost is also relatively high.
Utility model content
In view of the above-mentioned problems, the utility model provides a kind of lightning stroke absorbing circuit, including level-one inhales wave circuit, two level inhales wave
Circuit, three-level inhale wave circuit；The input terminal that the level-one inhales wave circuit is circuit input end, level-one inhale the output end of wave circuit with
Two level inhales the input terminal electrical connection of wave circuit, and the output end that two level inhales wave circuit is electrically connected with the input terminal of three-level suction wave circuit,
The output end that three-level inhales wave circuit is circuit output end.
It includes varistor M1 that the level-one, which inhales wave circuit, varistor M1 be set to circuit positive electrode and negative electrode it
Between.
It includes that varistor M2, inductance CM1, the inductance CM1 are set to level-one and inhale wave circuit that the two level, which inhales wave circuit,
Output end, the varistor M2 is set between the output cathode and cathode of inductance CM1.
The two level suction wave circuit is also electrically connected with rectifier bridge DBI, the varistor M2 and is set to the friendship of rectifier bridge DBI
Stream input terminal or varistor M2 are set to the DC output end of rectifier bridge DBI.
It includes varistor M3, inductance L1 that the three-level, which inhales wave circuit, and it is defeated that the inductance L1 is set to two level suction wave circuit
The anode gone out, the varistor M3 are set between the output end and ground terminal of inductance L1.
The beneficial effects of the utility model：This lightning stroke absorbing circuit provided by the utility model, is opened up in original circuit
It flutters and does not increase component in structure excessively, do not lose electric property, do not increase too many cost, done using primary circuit architectural characteristic
This performance, the lightning stroke absorbing circuit, circuit is simple, and core is first plus wave is inhaled using the element in the EMC structures in primary circuit
Part varistor constitutes gradually decaying and absorbs to control its energy level, so greatly reducing the effect of circuit cost and absorption
Fruit, reliability are also improved.Cost and effect are all significantly improved compared with traditional input single-stage absorption circuit.
The utility model is described in further details below with reference to attached drawing.
Description of the drawings
Fig. 1 is existing input single-stage lightning stroke absorbing circuit figure.
Fig. 2 is existing input single-stage lightning stroke absorbing circuit block diagram.
Fig. 3 is the lightning stroke absorbing circuit block diagram that the embodiment of the present invention provides.
Fig. 4 is the lightning stroke absorbing circuit block diagram that the embodiment of the present invention provides.
Fig. 5 is the LED drive circuit principle that the embodiment of the present invention provides.
Fig. 6 is the input voltage waveform figure of electric power network.
Fig. 7 is the oscillogram that the voltage of Fig. 6 obtains after input rectifying filter circuit.
Fig. 8 is the voltage of Fig. 7 via the oscillogram obtained after control and the exchange component of feedback circuit control.
Fig. 9 is the oscillogram that the voltage of Fig. 8 is obtained through secondary winding.
Figure 10 is the oscillogram that the voltage of Fig. 9 obtains after output rectifier and filter.
Specific implementation mode
Reach the technological means and effect that predetermined purpose is taken for the utility model is expanded on further, below in conjunction with attached drawing
And embodiment, to specific embodiment of the present utility model, structure feature and its effect, detailed description are as follows.
Embodiment 1
As shown in Figure 3, Figure 4, a kind of lightning stroke absorbing circuit is present embodiments provided, including level-one inhales wave circuit 1, two level is inhaled
Wave circuit 2, three-level inhale wave circuit 3；The input terminal that the level-one inhales wave circuit 1 is circuit input end, and level-one inhales the defeated of wave circuit 1
Enter to be additionally provided with circuit element F1 between end and circuit output end, element F1 can be fuse, insure resistance, NTC or electricity
Sense.Output end and the two level that level-one inhales wave circuit 1 are inhaled the input terminal of wave circuit 2 and be electrically connecteds, the output end of two level suction wave circuit 2 and
Three-level inhales the input terminal electrical connection of wave circuit 3, and the output end that three-level inhales wave circuit 3 is circuit output end.
It includes varistor M1 that above-mentioned level-one, which inhales wave circuit 1, varistor M1 be set to circuit positive electrode and negative electrode it
Between；Two level inhales wave circuit 2 and is set to the output that level-one inhales wave circuit including varistor M2, inductance CM1, the inductance CM1
End, the varistor M2 are set between the output cathode and cathode of inductance CM1；Two level suction wave circuit 2 is also electrically connected with whole
Bridge DBI is flowed, the varistor M2 is set to the ac input end of rectifier bridge DBI or varistor M2 is set to rectifier bridge
The DC output end of DBI；Three-level inhales wave circuit 3 and is set to two level including varistor M3, inductance L1, the inductance L1 and inhales wave
The anode of circuit output, the varistor M3 are set between the output end and ground terminal of inductance L1.It is utilized in every grade of circuit
Original fuse or EMC inductance do energy attenuation, are then gradually absorbed using varistor, the input height lightning stroke energy to make
Amount flows to very low when output, reaches the energy level that late-class circuit is fully able to bear.
Embodiment 2
Fig. 5 is the LED drive power circuit figure that the present embodiment is applied in LED illumination lamp, which is operated in
Switching mode, on off state is by feedback and control circuit signal deciding.Pass through induction in electric power network AC voltages (waveform such as Fig. 6)
After inhaling wave circuit decaying absorption via the level-one of fuse F1, varistor M1 compositions to a lightning stroke voltage, enter back by common mode
The two level of inductance CM1, bridge heap DB1 and varistor M2 composition is inhaled after wave circuit decaying absorbs, enter back by differential mode inductance L1 and
The three-level of varistor M3 composition inhales after wave circuit decaying absorbs one to make the D/C voltage that late-class circuit receives (waveform is as schemed
7) feedback and control circuit and exchange component that, this D/C voltage is formed via the winding of IC1, T1 again are chopped into square wave, and (waveform is such as
After Fig. 8), it is added in isolation power transformer first winding (the N1 windings of T1), then be coupled to secondary winding through magnetic core of transformer
Upper (the N2 windings of T1), so secondary winding obtains the square wave proportional to first winding (secondary winding waveform such as Fig. 9), this side
The D/C voltage (waveform such as Figure 10) that wave is needed after output rectifier and filter again, this D/C voltage resupplies LED light.To make
This LED drive power anti-lightning ability enhances, and the present embodiment is to increase by two by the circuit structure characteristic of this power circuit itself
A pressure-sensitive absorber element has just achieved the purpose that the ability for improving anti-lightning.This circuit operation is as follows:
Sense a lightning stroke voltage via fuse F1, varistor M1 groups in electric power network AC voltages (waveform such as Fig. 6)
At level-one inhale wave circuit decaying absorb after, enter back into the two level being made of common mode inductance CM1, bridge heap DB1 and varistor M2
After inhaling wave circuit decaying absorption, enters back into the three-level suction wave circuit decaying being made of differential mode inductance L1 and varistor M3 and absorb
A D/C voltage (waveform such as Fig. 7) that late-class circuit can be made to receive is obtained afterwards, this D/C voltage is returned via what the winding of IC1, T1 formed again
It grants control circuit and after exchange component is chopped into square wave (waveform such as Fig. 8), is added in isolation power transformer first winding
(the N1 windings of T1), then it is coupled in secondary winding (the N2 windings of T1) through magnetic core of transformer, so secondary winding obtains and one
The secondary square wave (secondary winding waveform such as Fig. 9) around composition ratio, what this square wave was needed after output rectifier and filter again
D/C voltage (waveform such as Figure 10).
Inductance in power supply EMC functional circuits is had intrinsic attenuation characteristic to the lightning stroke of this high frequency and is done using varistor more
It is one of most crux factor for the LED drive power that can this circuit be used for this high anti-lightning that grade, which absorbs,.
Above-mentioned only typical case one of of the present embodiment in LED drive power.Component parameters when the present embodiment is applied
Depending on being needed by actual design, does not do describe one by one here.
In conclusion this lightning stroke absorbing circuit, does not increase component excessively in original circuit topological structure, does not damage
Electric property is lost, does not increase too many cost, this performance is done using primary circuit architectural characteristic, the lightning stroke absorbing circuit, circuit letter
Single, core is that plus wave element varistor composition is inhaled, gradually decaying absorbs using the element in the EMC structures in primary circuit
Its energy level is controlled, so greatly reducing the effect of circuit cost and absorption, reliability is also improved.With it is traditional
Input single-stage absorption circuit is all significantly improved compared to cost and effect.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is confined to these explanations.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the scope of protection of the utility model.
Claims (3)
1. a kind of lightning stroke absorbing circuit, it is characterised in that：Wave circuit is inhaled including level-one, two level inhales wave circuit, three-level inhales wave circuit；
The input terminal that the level-one inhales wave circuit is circuit input end, and level-one inhales the input of the output end and two level suction wave circuit of wave circuit
End electrical connection, the output end that two level inhales wave circuit are electrically connected with the input terminal of three-level suction wave circuit, and three-level inhales the output of wave circuit
End is circuit output end；It includes varistor M1 that the level-one, which inhales wave circuit, varistor M1 be set to the anode of circuit with
Between cathode；It includes that varistor M2, inductance CM1, the inductance CM1 are set to level-one and inhale wave circuit that the two level, which inhales wave circuit,
Output end, the varistor M2 is set between the output cathode and cathode of inductance CM1；It is also electric that the two level inhales wave circuit
It is connected with rectifier bridge DBI, the varistor M2 is set to the ac input end of rectifier bridge DBI or varistor M2 is set to
The DC output end of rectifier bridge DBI.
2. lightning stroke absorbing circuit as described in claim 1, it is characterised in that：It includes varistor that the three-level, which inhales wave circuit,
M3, inductance L1, the inductance L1 are set to the anode that two level inhales wave circuit output, and the varistor M3 is set to inductance L1's
Between output end and ground terminal.
3. lightning stroke absorbing circuit as described in claim 1, it is characterised in that：The level-one inhales the input terminal and circuit of wave circuit
Circuit element is additionally provided between output end, which can be fuse, insure resistance, NTC or inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721513477.5U CN207926177U (en) | 2017-11-14 | 2017-11-14 | A kind of lightning stroke absorbing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721513477.5U CN207926177U (en) | 2017-11-14 | 2017-11-14 | A kind of lightning stroke absorbing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207926177U true CN207926177U (en) | 2018-09-28 |
Family
ID=63612988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721513477.5U Expired - Fee Related CN207926177U (en) | 2017-11-14 | 2017-11-14 | A kind of lightning stroke absorbing circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN207926177U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347079A (en) * | 2018-12-26 | 2019-02-15 | 深圳市科安技术有限公司 | A kind of two-in-one lightning with voltage conversion function |
-
2017
- 2017-11-14 CN CN201721513477.5U patent/CN207926177U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347079A (en) * | 2018-12-26 | 2019-02-15 | 深圳市科安技术有限公司 | A kind of two-in-one lightning with voltage conversion function |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180928 Termination date: 20211114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |