CN205353185U - Current foldback circuit - Google Patents
Current foldback circuit Download PDFInfo
- Publication number
- CN205353185U CN205353185U CN201521142171.4U CN201521142171U CN205353185U CN 205353185 U CN205353185 U CN 205353185U CN 201521142171 U CN201521142171 U CN 201521142171U CN 205353185 U CN205353185 U CN 205353185U
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- China
- Prior art keywords
- current
- integrated circuit
- input end
- operational amplifier
- limiting resistance
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- Expired - Fee Related
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- 230000009977 dual effect Effects 0.000 claims description 13
- 230000037361 pathway Effects 0.000 claims description 13
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a current foldback circuit has solved the too complicated technical problem of current foldback circuit device structure among the current reactive power compensator, the utility model discloses intelligence current foldback circuit, include that binary channels operational amplifier and two voltage ratios are than integrated circuit, binary channels operational amplifier's positive going input end is connected with a current -limiting resistor, binary channels operational amplifier's output is connected with two the 2nd current -limiting resistor, one the 2nd current -limiting resistor and the positive going input end connection positive threshold voltage module of this pair voltage ratio than integrated circuit are connected than integrated circuit's reverse input end to two voltage ratios, another pair voltage ratio connects another the 2nd current -limiting resistor than integrated circuit's positive going input end and burden threshold voltage module is connected than integrated circuit's reverse input end to this pair voltage ratio.
Description
Technical field
This utility model relates to a kind of current foldback circuit.
Background technology
Current foldback circuit apparatus structure in the reactive power compensator of prior art is excessively complicated, not only has higher power consumption, and fault rate is also significantly high.
Utility model content
Technical problem to be solved in the utility model is just to provide a kind of current foldback circuit, solves the technical problem that the current foldback circuit apparatus structure in existing reactive power compensator is excessively complicated.
For solving above-mentioned technical problem, this utility model adopts the following technical scheme that
A kind of current foldback circuit, integrated circuit is compared including dual pathways operational amplifier and two twin voltage, the positive input of described dual pathways operational amplifier is connected to the first current-limiting resistance, the outfan of dual pathways operational amplifier is connected to two the second current-limiting resistances, one twin voltage compares the reverse input end of integrated circuit and connects second current-limiting resistance and this twin voltage compares the positive input of integrated circuit and connects positive threshold voltage module, another twin voltage compares the positive input of integrated circuit and connects another second current-limiting resistance and this twin voltage compares the reverse input end of integrated circuit and connects negative threshold voltage module.
Further, described positive threshold voltage module includes comparing with twin voltage the reverse input end of integrated circuit and is connected the 3rd current-limiting resistance, concatenates the first adjustable resistance of the 3rd current-limiting resistance and the first electric capacity of the first adjustable resistance in parallel, and described negative threshold voltage module includes comparing with twin voltage the positive input of integrated circuit and is connected the 4th current-limiting resistance, concatenates the second adjustable resistance of the 4th current-limiting resistance and the second electric capacity of the second adjustable resistance in parallel.
The beneficial effects of the utility model are:
The positive input input current of dual pathways operational amplifier gathers signal, current acquisition signal compares integrated circuit by two twin voltage after dual pathways operational amplifier operation amplifier and compares with positive threshold voltage and negative threshold voltage, realize the upset of output level, it is used for detecting whether output electric current crosses stream with this, parts of the present utility model are simple, significantly reduce power consumption and fault rate.
Concrete technique effect of the present utility model will be further described in a specific embodiment.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, this utility model is described further:
Fig. 1 is the circuit diagram of a kind of current foldback circuit of this utility model；
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is elaborated.
As shown in Figure 1, a kind of current foldback circuit, integrated circuit 2 is compared including dual pathways operational amplifier 1 and two twin voltage, the positive input of dual pathways operational amplifier 1 is connected to the first current-limiting resistance 11, the outfan of dual pathways operational amplifier 1 is connected to two the second current-limiting resistances 12, one twin voltage compares the reverse input end of integrated circuit 2 and connects second current-limiting resistance 12 and this twin voltage compares the positive input of integrated circuit 2 and connects positive threshold voltage module 3, another twin voltage compares the positive input of integrated circuit 2 and connects another second current-limiting resistance 12 and this twin voltage compares the reverse input end of integrated circuit 2 and connects negative threshold voltage module 4.
Positive threshold voltage module 3 includes comparing with twin voltage the reverse input end of integrated circuit 2 and is connected the 3rd current-limiting resistance 31, concatenates the first adjustable resistance 32 of the 3rd current-limiting resistance 31 and the first electric capacity 33 of the first adjustable resistance 32 in parallel, and negative threshold voltage module 4 includes comparing with twin voltage the positive input of integrated circuit 2 and is connected the 4th current-limiting resistance 41, concatenates the second adjustable resistance 42 of the 4th current-limiting resistance 41 and the second electric capacity 43 of the second adjustable resistance 42 in parallel.
The positive input input current of dual pathways operational amplifier 1 gathers signal, current acquisition signal compares integrated circuit 2 by two twin voltage after dual pathways operational amplifier 1 operation amplifier and compares with positive threshold voltage and negative threshold voltage, realize the upset of output level, it is used for detecting whether output electric current crosses stream with this, parts of the present utility model are simple, significantly reduce power consumption and fault rate.
Above this utility model preferred embodiment is described, but is not to be construed as limitations on claims.This utility model is not only limited to above example, its concrete structure allows to change, those skilled in the art can be variously modified according to this utility model and deform, and without departing from spirit of the present utility model, belong to the scope that this utility model claims are defined.
Claims (2)
1. a current foldback circuit, it is characterized in that, integrated circuit is compared including dual pathways operational amplifier and two twin voltage, the positive input of described dual pathways operational amplifier is connected to the first current-limiting resistance, the outfan of dual pathways operational amplifier is connected to two the second current-limiting resistances, one twin voltage compares the reverse input end of integrated circuit and connects second current-limiting resistance and this twin voltage compares the positive input of integrated circuit and connects positive threshold voltage module, another twin voltage compares the positive input of integrated circuit and connects another second current-limiting resistance and this twin voltage compares the reverse input end of integrated circuit and connects negative threshold voltage module.
2. a kind of current foldback circuit according to claim 1; it is characterized in that; described positive threshold voltage module includes comparing with twin voltage the reverse input end of integrated circuit and is connected the 3rd current-limiting resistance, concatenates the first adjustable resistance of the 3rd current-limiting resistance and the first electric capacity of the first adjustable resistance in parallel, and described negative threshold voltage module includes comparing with twin voltage the positive input of integrated circuit and is connected the 4th current-limiting resistance, concatenates the second adjustable resistance of the 4th current-limiting resistance and the second electric capacity of the second adjustable resistance in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521142171.4U CN205353185U (en) | 2015-12-31 | 2015-12-31 | Current foldback circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521142171.4U CN205353185U (en) | 2015-12-31 | 2015-12-31 | Current foldback circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205353185U true CN205353185U (en) | 2016-06-29 |
Family
ID=56173484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521142171.4U Expired - Fee Related CN205353185U (en) | 2015-12-31 | 2015-12-31 | Current foldback circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205353185U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113252969A (en) * | 2021-04-15 | 2021-08-13 | 厦门华联电子股份有限公司 | Double-limit adjustable overcurrent detection circuit and overcurrent detection device |
-
2015
- 2015-12-31 CN CN201521142171.4U patent/CN205353185U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113252969A (en) * | 2021-04-15 | 2021-08-13 | 厦门华联电子股份有限公司 | Double-limit adjustable overcurrent detection circuit and overcurrent detection device |
| CN113252969B (en) * | 2021-04-15 | 2023-12-15 | 厦门华联电子股份有限公司 | Double-limit adjustable overcurrent detection circuit and overcurrent detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160629 Termination date: 20211231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |