CN204304403U - Electric automobile direct current generator current foldback circuit - Google Patents
Electric automobile direct current generator current foldback circuit Download PDFInfo
- Publication number
- CN204304403U CN204304403U CN201420591438.7U CN201420591438U CN204304403U CN 204304403 U CN204304403 U CN 204304403U CN 201420591438 U CN201420591438 U CN 201420591438U CN 204304403 U CN204304403 U CN 204304403U
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- CN
- China
- Prior art keywords
- circuit
- direct current
- current generator
- comparator
- sample resistance
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a kind of electric automobile direct current generator current foldback circuit, it is characterized in that, described DC protection circuit comprises the sampling protection circuit, signal amplification circuit, voltage comparator circuit and the driving latching circuit that connect successively; Described sampling protection circuit comprises sample resistance R1, load is connected with sample resistance R1, sample resistance R1 is by amplifier protection circuit connection signal amplifying circuit, signal amplification circuit is in-phase amplifier, in-phase amplifier connects voltage comparator circuit, voltage comparator circuit is comparator circuit, and its comparator connects upper resistance R7, R5; The output pin of comparator connects one-way SCR, and the pin of one-way SCR gets involved the on-off circuit of direct current generator.The utility model can adapt to the fluctuation of electric car power supply, and can stablize lasting maintenance UNICOM state.If occur, large over-current state can cut off supply line in time, prevents direct current generator to be compromised.
Description
Technical field
The utility model relates to a kind of electric automobile direct current generator current foldback circuit.
Background technology
Direct current generator as the most important actuating unit of electric automobile, most important thing when it normally works.If power failure can cause direct current generator operating current unstable, affect Power output.
When present overcurrent protection is above setting numerical value, fuse protection silk cuts off electric current and power supply.Due to the special role of electric automobile direct current generator, add that automobile power source in use has certain fluctuation to belong to unavoidable situation.According to existing current protection technology, easily occur that overcurrent does not react or the lasting situation that cannot work.
Utility model content
According to above deficiency of the prior art, the technical problems to be solved in the utility model is: provide one can overcome above-mentioned defect, can play the electric automobile direct current generator current foldback circuit of good protection effect.
Electric automobile direct current generator current foldback circuit provided by the utility model, is characterized in that, described DC protection circuit comprises the sampling protection circuit, signal amplification circuit, voltage comparator circuit and the driving latching circuit that connect successively;
Described sampling protection circuit comprises sample resistance R1, load is connected with sample resistance R1, sample resistance R1 is by amplifier protection circuit connection signal amplifying circuit, signal amplification circuit is in-phase amplifier, in-phase amplifier connects voltage comparator circuit, voltage comparator circuit is comparator circuit, its comparator connect upper resistance R7, R5; The output pin of comparator connects one-way SCR, and the pin of one-way SCR gets involved the on-off circuit of direct current generator.
The beneficial effects of the utility model it is possible to the fluctuation adapting to electric car power supply, and can stablize lasting maintenance UNICOM state.If occur, large over-current state can cut off supply line in time, prevents direct current generator to be compromised.Effectively can adapt to the duty of electric automobile, good protection electric automobile direct current generator.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
As shown in Figure 1
Electric automobile direct current generator current foldback circuit, described DC protection circuit comprises the sampling protection circuit, signal amplification circuit, voltage comparator circuit and the driving latching circuit that connect successively;
Described sampling protection circuit comprises sample resistance R1, load is connected with sample resistance R1, sample resistance R1 is by amplifier protection circuit connection signal amplifying circuit, signal amplification circuit is in-phase amplifier, in-phase amplifier connects voltage comparator circuit, voltage comparator circuit is comparator circuit, its comparator connect upper resistance R7, R5; The output pin of comparator connects one-way SCR, and the pin of one-way SCR gets involved the on-off circuit of direct current generator.
Sample resistance R1 connection load and load two sections of electric currents are identical, and amplifier protection circuit comprises R3 and D1 be connected in series, and the large voltage that preventing fluctuates occurs damages signal amplification circuit.Signal amplification circuit is in-phase amplifier conventional at present.Compare and then control the access signal of one-way SCR after voltage comparator circuit receives the signal that signal amplification circuit sends with the numerical value preset.
One-way SCR enters conducting state after receiving the signal of comparator, and is in conducting state always, even if there is slight fluctuations in electric car power supply, and excessively also can not block suddenly through comparator.If after there is larger fluctuation and overcurrent, comparator stops to one-way SCR conveying, and be equivalent to load to peel off one-way SCR, one-way SCR ends, and then cuts off on-off circuit S2 and S3 of direct current generator, makes power supply cannot continue transmission of electricity to direct current generator.Ensure the use safety of direct current generator.
Claims (1)
1. an electric automobile direct current generator current foldback circuit, is characterized in that, described DC protection circuit comprises the sampling protection circuit, signal amplification circuit, voltage comparator circuit and the driving latching circuit that connect successively;
Described sampling protection circuit comprises sample resistance R1, load is connected with sample resistance R1, sample resistance R1 is by amplifier protection circuit connection signal amplifying circuit, signal amplification circuit is in-phase amplifier, in-phase amplifier connects voltage comparator circuit, voltage comparator circuit is comparator circuit, its comparator connect upper resistance R7, R5; The output pin of comparator connects one-way SCR Q1, and the pin of one-way SCR Q1 gets involved the on-off circuit of direct current generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420591438.7U CN204304403U (en) | 2014-10-14 | 2014-10-14 | Electric automobile direct current generator current foldback circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420591438.7U CN204304403U (en) | 2014-10-14 | 2014-10-14 | Electric automobile direct current generator current foldback circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204304403U true CN204304403U (en) | 2015-04-29 |
Family
ID=53109917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420591438.7U Expired - Fee Related CN204304403U (en) | 2014-10-14 | 2014-10-14 | Electric automobile direct current generator current foldback circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204304403U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188126A (en) * | 2018-08-22 | 2019-01-11 | 深圳市矽电半导体设备有限公司 | A kind of ESD equipment operation condition monitoring device and its monitoring method |
-
2014
- 2014-10-14 CN CN201420591438.7U patent/CN204304403U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188126A (en) * | 2018-08-22 | 2019-01-11 | 深圳市矽电半导体设备有限公司 | A kind of ESD equipment operation condition monitoring device and its monitoring method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150429 Termination date: 20211014 |