CN105576618A - Protection circuit - Google Patents
Protection circuit Download PDFInfo
- Publication number
- CN105576618A CN105576618A CN201410530231.3A CN201410530231A CN105576618A CN 105576618 A CN105576618 A CN 105576618A CN 201410530231 A CN201410530231 A CN 201410530231A CN 105576618 A CN105576618 A CN 105576618A
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- China
- Prior art keywords
- circuit
- voltage
- chip microcomputer
- isolation
- power supply
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Abstract
The invention discloses a protection circuit capable of preventing damages on a storage battery charger caused by abrupt change of AC voltage. The protection circuit comprises an isolation power supply transformation circuit (1), an isolation voltage sampling circuit (2), a single-chip microcomputer processing circuit (4), a control relay circuit (3), and an AC voltage acquisition output circuit (5), and is characterized in that the isolation power supply transformation circuit (1) and the isolation voltage sampling circuit (2) are respectively connected with the single-chip microcomputer processing circuit (4); the control relay circuit (3) and the AC voltage acquisition output circuit (5) are respectively connected with the single-chip microcomputer processing circuit (4). The protection circuit is advantageous in that the acquisition and output function of the AC voltage, which is fast in the motion reaction under the undervoltage condition and is highly isolated, can be provided.
Description
Technical field
The present invention relates to a kind of protective circuit, be specifically related to a kind of to there is the protective circuit that anti-alternating voltage significantly changes and the battery charger that causes damages.
Background technology
Common overvoltage-undervoltage protector is when voltage fluctuation, and reflection of cutting off the electricity supply wants 1-2 second slowly, cannot play the object of protection battery charger.When voltage fluctuation is to 400V, protector self damages.
Summary of the invention
The object of this invention is to provide a kind of protective circuit, the features such as the function that when it has under-voltage, movement response speed AC voltage sampling that is fast, high accuracy isolation exports.
In order to solve the problem existing for background technology, the present invention is by the following technical solutions: it comprises insulating power supply transforming circuit 1, isolation voltage sample circuit 2, single-chip microcomputer treatment circuit 4, control relay circuit 3, AC voltage sampling output circuit 5, insulating power supply transforming circuit 1 is connected with single-chip microcomputer treatment circuit 4 respectively with isolation voltage sample circuit 2, and control relay circuit 3 is also connected with single-chip microcomputer treatment circuit 4 respectively with AC voltage sampling output circuit 5.
Described insulating power supply transforming circuit 1, it is the step-down transformer that an input ac voltage reaches 400V, reliable and stable working power can both be provided for protective circuit when alternating voltage is in 100V to 400V voltage fluctuation, and common protector is with regard to likely when alternating voltage 400V, self burns out, described isolation voltage sample circuit 2, it is a Miniature precision voltage transformer, described single-chip microcomputer treatment circuit 4 is microprocessors of 8 low costs, described AC voltage sampling output circuit 5 is the low voltage pulse signals exported by Single-chip Controlling, the alternating voltage of its frequency and input is proportional, provide conveniently for other products reads alternating voltage.
The advantage that the present invention has: movement response speed is fast when overvoltage/undervoltage; reach Millisecond to cut off the electricity supply thus the function playing protection battery charger; according to the fluctuation situation intellectual analysis when function of supplying power sending into voltage during power transmission; thus effectively can prevent the damage of battery charger; also provide the function that the AC voltage sampling of high accuracy isolation exports, for the access of other products and detection provide conveniently simultaneously.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention.
Embodiment
With reference to Fig. 1, it comprises insulating power supply transforming circuit 1, isolation voltage sample circuit 2, single-chip microcomputer treatment circuit 4, control relay circuit 3, AC voltage sampling output circuit 5, insulating power supply transforming circuit 1 is connected with single-chip microcomputer treatment circuit 4 respectively with isolation voltage sample circuit 2, and control relay circuit 3 is also connected with single-chip microcomputer treatment circuit 4 respectively with AC voltage sampling output circuit 5.
Insulating power supply transforming circuit 1, effect is to provide protective circuit power supply.Isolation voltage sample circuit 2, effect is to provide high-precision sampling voltage and gives single-chip microcomputer treatment circuit 4, carrys out the break-make of control relay circuit 3, thus play a protective role through the analysis of single-chip microcomputer.Through single-chip microcomputer treatment circuit 4, the pulse signal of reflection alternating voltage change is sent in AC voltage sampling output circuit 5 in addition, what AC voltage sampling output circuit 5 exported is the pulse signal proportional with alternating voltage, is convenient to other equipment reading alternating voltage and carries out data processing.
Claims (5)
1. a protective circuit; it is characterized in that it comprises insulating power supply transforming circuit (1), isolation voltage sample circuit (2), single-chip microcomputer treatment circuit (4), control relay circuit (3), AC voltage sampling output circuit (5); insulating power supply transforming circuit (1) is connected with single-chip microcomputer treatment circuit (4) respectively with isolation voltage sample circuit (2), and control relay circuit (3) is also connected with single-chip microcomputer treatment circuit (4) respectively with AC voltage sampling output circuit (5).
2. a kind of protective circuit according to claim 1 is characterized in that described insulating power supply transforming circuit (1); it is the step-down transformer that an input ac voltage reaches 400V; can both provide reliable and stable working power for protective circuit when alternating voltage is in 100V to 400V voltage fluctuation, and common protector is with regard to likely self burns out when alternating voltage 400V.
3. a kind of protective circuit according to claim 1 is characterized in that described isolation voltage sample circuit (2), is a Miniature precision voltage transformer.
4. a kind of protective circuit according to claim 1 is characterized in that described single-chip microcomputer treatment circuit (4) is the microprocessor of 8 low costs.
5. a kind of protective circuit according to claim 1 is characterized in that described AC voltage sampling output circuit (5) is a low voltage pulse signal exported by Single-chip Controlling; the alternating voltage of its frequency and input is proportional, provides conveniently for other products reads alternating voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410530231.3A CN105576618A (en) | 2014-10-10 | 2014-10-10 | Protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410530231.3A CN105576618A (en) | 2014-10-10 | 2014-10-10 | Protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105576618A true CN105576618A (en) | 2016-05-11 |
Family
ID=55886459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410530231.3A Pending CN105576618A (en) | 2014-10-10 | 2014-10-10 | Protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105576618A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026013A (en) * | 2016-05-19 | 2016-10-12 | 安徽信邦塑业有限公司 | Protection circuit for storage battery charger |
-
2014
- 2014-10-10 CN CN201410530231.3A patent/CN105576618A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026013A (en) * | 2016-05-19 | 2016-10-12 | 安徽信邦塑业有限公司 | Protection circuit for storage battery charger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160511 |