CN208904643U - A kind of surge protection circuit - Google Patents
A kind of surge protection circuit Download PDFInfo
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- CN208904643U CN208904643U CN201821622147.4U CN201821622147U CN208904643U CN 208904643 U CN208904643 U CN 208904643U CN 201821622147 U CN201821622147 U CN 201821622147U CN 208904643 U CN208904643 U CN 208904643U
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- electrostatic conducting
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Abstract
The utility model discloses a kind of surge protection circuits, including at least the first electrostatic conducting component that can be connected in surge impact, and include at least the first current-limiting components, the second current-limiting components；One end of first electrostatic conducting component is electrically connected with a pole of one end of the first current-limiting components, external power supply respectively；The other end of first current-limiting components and a pole of external loading output end are electrically connected；The other end of first electrostatic conducting component is electrically connected with another pole of another pole of external power supply, one end of the second current-limiting components respectively；The other end of second current-limiting components and another pole of external loading output end are electrically connected；Turn-on time shifts to an earlier date, and subsequent first current-limiting components, the second current-limiting components form bilateral barrier, prevents surge impact from impacting to rear load.
Description
Technical field
The utility model relates to circuit field, especially a kind of protection circuit of antisurge impact.
Background technique
Traditional surge protection circuit generally comprises at least one electrostatic conducting component 1 ' and extremely as shown in Figure 1-Figure 3
Few current-limiting components 2 ', in the past in the route of power supply to load, can all connect a current-limiting components 2 ' after power supply, then exist
The tail end of a current-limiting components 2 ' electrostatic conducting component 1 ' in parallel, while load is accessed, when surge impact, electrostatic conducting component 1 '
The excessive starting conducting of end voltage, surge current is released from electrostatic conducting component, prevents the load for influencing rear,
However the above structure has obvious problem, the conducting of electrostatic conducting component 1 ' has a degree of hysteresis quality, at this time portion
Electric current is divided to have flowed into rear load.
Utility model content
In order to solve the above technical problems, the fast and effective surge protection the purpose of the utility model is to provide a kind of reaction
Circuit.
The technical solution adopted in the utility model is:
A kind of surge protection circuit, including at least the first electrostatic conducting component that can be connected in surge impact, and
Including at least the first current-limiting components, the second current-limiting components；
An extremely electrical property of the one end of first electrostatic conducting component respectively with one end of the first current-limiting components, external power supply connects
It connects；
The other end of first current-limiting components and a pole of external loading output end are electrically connected；
The other end of first electrostatic conducting component respectively with another pole of external power supply, the second current-limiting components one end it is another
One pole is electrically connected；
The other end of second current-limiting components and another pole of external loading output end are electrically connected.
It further include the second electrostatic conducting component and third current-limiting components；
One end of second electrostatic conducting component pole with the other end of the first current-limiting components, external loading output end respectively
It is electrically connected；
The other end of second electrostatic conducting component respectively with the other end of the second current-limiting components, external loading output end it is another
One pole is electrically connected；
One end of third current-limiting components and a pole of external power supply are electrically connected；
The other end of third current-limiting components is electric with one end of one end of the first current-limiting components, the first electrostatic conducting component respectively
Property connection.
It further include the 4th current-limiting components；
One end of 4th current-limiting components and another pole of external power supply are electrically connected；
The other end of 4th current-limiting components respectively with the other end of the second current-limiting components, the first electrostatic conducting component it is another
End is electrically connected.
First current-limiting components are sequentially connected in series by several current limiting elements.
Second current-limiting components are sequentially connected in series by several current limiting elements.
It further include rectifier bridge component；
One pole of rectifier bridge part input and the other end of the first current-limiting components are electrically connected；
Another pole of rectifier bridge part input and the other end of the second current-limiting components are electrically connected；
One pole of rectifier bridge element outputs and a pole of external power supply are electrically connected；
Another pole of rectifier bridge element outputs and another pole of external power supply are electrically connected.
The first electrostatic conducting component is TVS diode or varistor.
The utility model has the beneficial effects that
The utility model surge protection circuit, surge impact are flowed into from source side and are loaded, the conducting of the first electrostatic conducting component,
It is compared with traditional circuit, turn-on time shifts to an earlier date, and subsequent first current-limiting components, the second current-limiting components form bilateral barrier, prevents
Only surge impact impacts rear load.
Further, the number of current-limiting components or electrostatic conducting component can be increased, to reduce single current-limiting components or quiet
The parameter specification of electrically conducting parts, to reduce the volume of single component, so that protecting effect is more perfect, circuit architecture is stablized
Property is more preferably.
Detailed description of the invention
Specific embodiment of the present utility model is described further with reference to the accompanying drawing.
Fig. 1 is the one embodiment schematic diagram of conventional surge protection circuit.
Fig. 2 is another embodiment schematic diagram of conventional surge protection circuit.
Fig. 3 is the another embodiment schematic diagram of conventional surge protection circuit.
Fig. 4 is the first embodiment schematic diagram of the utility model surge protection circuit.
Fig. 5 is the second embodiment schematic diagram of the utility model surge protection circuit.
Fig. 6 is the 3rd embodiment schematic diagram of the utility model surge protection circuit.
Fig. 7 is the fourth embodiment schematic diagram of the utility model surge protection circuit.
Fig. 8 is the 5th embodiment schematic diagram of the utility model surge protection circuit.
Fig. 9 is the sixth embodiment schematic diagram of the utility model surge protection circuit.
Figure 10 is the 7th embodiment schematic diagram of the utility model surge protection circuit.
Specific embodiment
As shown in Fig. 4-Figure 10, a kind of surge protection circuit is quiet including at least can be connected in surge impact first
Electrically conducting parts 1, and include at least the first current-limiting components 2, the second current-limiting components 3；
An extremely electrical property of the one end of first electrostatic conducting component 1 respectively with one end of the first current-limiting components 2, external power supply connects
It connects；
The other end of first current-limiting components 2 and a pole of external loading output end are electrically connected；
The other end of first electrostatic conducting component 1 one end with another pole of external power supply, second current-limiting components 2 respectively
Another pole is electrically connected；
The other end of second current-limiting components 2 and another pole of external loading output end are electrically connected.
Wherein, the first electrostatic conducting component and electrostatic conducting component mentioned below may each be bis- pole TVS herein
Pipe or varistor, current-limiting components can be the elements such as current-limiting resistance, and a pole of power supply herein can be anode or negative
Pole, and another pole of power supply is then opposite cathode or anode, at the same a pole of the input terminal loaded be also possible to anode or
Person's cathode, another pole of the input terminal of load are then opposite cathode or anode.
Surge impact is flowed into from source side and is loaded, and the conducting of the first electrostatic conducting component is compared, turn-on time with traditional circuit
In advance, and subsequent first current-limiting components, the second current-limiting components form bilateral barrier, prevent surge impact from causing to rear load
It influences.
Further, in conjunction with the connection of above-mentioned access power positive cathode, the design can derive the second and of Fig. 5 and Fig. 6
Three embodiments further include the second electrostatic conducting component 4 and third current-limiting components 5；
One end of second electrostatic conducting component 4 respectively with the other end of the first current-limiting components 2, external loading output end one
Pole is electrically connected；
The other end of second electrostatic conducting component 4 respectively with the other ends of the second current-limiting components 3, external loading output end
Another pole is electrically connected；
One end of third current-limiting components 5 and a pole of external power supply are electrically connected；
The other end of third current-limiting components 5 respectively with one end of the first current-limiting components 2, the first electrostatic conducting component 1 one
End is electrically connected.
Electrostatic conducting component is further added herein, then is to form second to ensure again, improves the security performance of entire circuit,
The volume of discrete component can also be reduced simultaneously.
Further, can also derive Fig. 7-Fig. 9 the 4th, the 5th, sixth embodiment, further include the 4th current-limiting components 6；
One end of 4th current-limiting components 6 and another pole of external power supply are electrically connected；
The other end of 4th current-limiting components 6 respectively with the other end of the second current-limiting components 3, the first electrostatic conducting component 1
The other end is electrically connected.
Meanwhile first current-limiting components 2 be sequentially connected in series by several current limiting elements.
Second current-limiting components 3 are sequentially connected in series by several current limiting elements.
Increase the number of current-limiting components or electrostatic conducting component, to reduce single current-limiting components or electrostatic conducting component
Parameter specification, to reduce the volume of single component, so that protecting effect is more perfect, circuit architecture stability is more preferably.
If external power supply is alternating current, and loading as DC load further includes then correspondingly rectifier bridge as shown in Figure 10
Component；
The other end of one pole of 7 input terminal of rectifier bridge component and the first current-limiting components 2 is electrically connected；
The other end of another pole of 7 input terminal of rectifier bridge component and the second current-limiting components 3 is electrically connected；
One pole of 7 output end of rectifier bridge component and a pole of external power supply are electrically connected；
Another pole of 7 output end of rectifier bridge component and another pole of external power supply are electrically connected.
Similarly, can be first connected on the pole L bus or the pole N bus before external the first electrostatic conducting of plant-grid connection component
Three current-limiting components, the 4th current-limiting components, but after the first electrostatic conducting component, need to increase by the first restriction in the form of bilateral
Part and the second current-limiting components, one end of the first current-limiting components is connect with one end of the first electrostatic conducting component, and the second restriction
The other end of part is connect with the other end of the first electrostatic conducting component, later the other end of the first current-limiting components and the second restriction
The other end of part accesses rectifier bridge again, to guarantee that the first electrostatic conducting component is connected in time, and the first limit of bilateral structure
Stream unit and the second current-limiting components cause to block to surge impact, prevent the component wear of rear end.
The foregoing is merely the preferred embodiments of the utility model, the utility model is not limited to above-mentioned embodiment party
Formula, if with essentially identical means realize the utility model aim technical solution belong to the protection scope of the utility model it
It is interior.
Claims (7)
1. a kind of surge protection circuit, which is characterized in that including at least the first electrostatic conducting that can be connected in surge impact
Component, and include at least the first current-limiting components, the second current-limiting components；
One end of first electrostatic conducting component is electrically connected with a pole of one end of the first current-limiting components, external power supply respectively；
The other end of first current-limiting components and a pole of external loading output end are electrically connected；
The other end of first electrostatic conducting component another pole with another pole of external power supply, one end of the second current-limiting components respectively
It is electrically connected；
The other end of second current-limiting components and another pole of external loading output end are electrically connected.
2. a kind of surge protection circuit according to claim 1, it is characterised in that:
It further include the second electrostatic conducting component and third current-limiting components；
One end of second electrostatic conducting component respectively with the other end of the first current-limiting components, external loading output end one extremely electrically
Connection；
The other end of second electrostatic conducting component another pole with the other end of the second current-limiting components, external loading output end respectively
It is electrically connected；
One end of third current-limiting components and a pole of external power supply are electrically connected；
The one end of the other end of third current-limiting components respectively with one end of the first current-limiting components, the first electrostatic conducting component electrically connects
It connects.
3. a kind of surge protection circuit according to claim 2, it is characterised in that: further include the 4th current-limiting components；
One end of 4th current-limiting components and another pole of external power supply are electrically connected；
The other end of 4th current-limiting components is electric with the other end of the other end of the second current-limiting components, the first electrostatic conducting component respectively
Property connection.
4. a kind of surge protection circuit according to claim 2 or 3, it is characterised in that: if first current-limiting components by
A dry current limiting element is sequentially connected in series.
5. a kind of surge protection circuit according to claim 2 or 3, it is characterised in that: if second current-limiting components by
A dry current limiting element is sequentially connected in series.
6. a kind of surge protection circuit according to claim 2, it is characterised in that: further include rectifier bridge component；
One pole of rectifier bridge part input and the other end of the first current-limiting components are electrically connected；
Another pole of rectifier bridge part input and the other end of the second current-limiting components are electrically connected；
One pole of rectifier bridge element outputs and a pole of external power supply are electrically connected；
Another pole of rectifier bridge element outputs and another pole of external power supply are electrically connected.
7. a kind of surge protection circuit according to claim 1, it is characterised in that: the first electrostatic conducting component is
TVS diode or varistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821622147.4U CN208904643U (en) | 2018-09-30 | 2018-09-30 | A kind of surge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821622147.4U CN208904643U (en) | 2018-09-30 | 2018-09-30 | A kind of surge protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208904643U true CN208904643U (en) | 2019-05-24 |
Family
ID=66574814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821622147.4U Active CN208904643U (en) | 2018-09-30 | 2018-09-30 | A kind of surge protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208904643U (en) |
-
2018
- 2018-09-30 CN CN201821622147.4U patent/CN208904643U/en active Active
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