CN205945006U - Over -current protective control circuit - Google Patents
Over -current protective control circuit Download PDFInfo
- Publication number
- CN205945006U CN205945006U CN201620882206.6U CN201620882206U CN205945006U CN 205945006 U CN205945006 U CN 205945006U CN 201620882206 U CN201620882206 U CN 201620882206U CN 205945006 U CN205945006 U CN 205945006U
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- relay
- diode
- resistance
- contact
- electric capacity
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Abstract
The utility model discloses an over -current protective control circuit, including resistance R1, key switch S, electric capacity C1, diode D1, relay J1, relay J2, emitting diode LED1 and emitting diode LED2, 220V alternating current one end is connected to key switch S one end, the key switch S other end is connecting resistance R1 respectively, relay J1 coil and electric capacity C1, anodal and the resistance R1 other end of diode D1 is connected respectively to the electric capacity C1 other end, diode D2 negative pole is connected respectively to diode D1 negative pole, electric capacity C2, emitting diode LED1 is anodal, relay J2 coil, diode D3 negative pole and emitting diode LED2 are anodal, emitting diode LED2 negative pole connecting resistance R3. The utility model discloses over -current protective control circuit, because overflow and lead to electrical load power when increase, under key switch S must press to automatic cutout load power supply behind power power is reduced, need could resume to supply power, the security height, circuit structure is simple, and is with low costs.
Description
Technical field
This utility model is related to a kind of protection circuit, specifically a kind of overcurrent protection control circuit.
Background technology
Because power-converting device is all operated in high-power environment, excessively stream and short circuit are inevitable, in order to ensure
Power-converting device safely and reliably works, and effective current protection design is necessary.The circuit of existing overcurrent protection sets
Meter is varied, and some are controlled using PLD although precision is higher, but cost is also high.
Utility model content
The purpose of this utility model is to provide a kind of overcurrent protection control circuit, to solve to propose in above-mentioned background technology
Problem.
For achieving the above object, this utility model provides following technical scheme：
A kind of overcurrent protection control circuit, including resistance R1, key switch S, electric capacity C1, diode D1, relay J1, continues
Electrical equipment J2, LED 1 and LED 2, described key switch S one end connects 220V alternating current one end, presses
The key switch S other end connects resistance R1, relay J1 coil and electric capacity C1 respectively, and the electric capacity C1 other end connects diode D1 respectively
Positive pole and the resistance R1 other end, diode D1 negative pole is just connecting diode D2 negative pole, electric capacity C2, LED 1 respectively
Pole, relay J2 coil, diode D3 negative pole and LED 2 positive pole, LED 2 negative pole connects resistance
R3, the resistance R3 other end connects diode D3 positive pole, relay J2 contact J2-1 pin 1, the relay J2 contact other end respectively
With relay J1 contact J1-1, the relay J1 contact J1-1 other end connects the electric capacity C2 other end, resistance R2, diode D2 respectively
Positive pole, the 220V alternating current other end and relay J2 contact J2-1 pin 2, relay J2 contact J2-1 pin 3 connects outfan
Vo, resistance R2 other end connecting luminous diode LED1 negative pole, it is another that the described relay J1 coil other end connects output end vo
End.
As further program of the utility model：Described relay J1 contact J1-1 is normally opened contact.
Compared with prior art, the beneficial effects of the utility model are：This utility model overcurrent protection control circuit, because
When leading to electrical load power to increase for excessively stream, automatically cut off load supplying it is necessary to after power reduces, push button
Switch S, needs just can restore electricity, and safe, circuit structure is simple, low cost.
Brief description
Fig. 1 is the circuit diagram of overcurrent protection control circuit.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely description is it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of making creative work
The every other embodiment being obtained, broadly falls into the scope of this utility model protection.
Refer to Fig. 1, in this utility model embodiment, a kind of overcurrent protection control circuit, including resistance R1, key switch
S, electric capacity C1, diode D1, relay J1, relay J2, LED 1 and LED 2, described button is opened
Close S one end and connect 220V alternating current one end, the key switch S other end connects resistance R1, relay J1 coil and electric capacity C1 respectively,
The electric capacity C1 other end connects diode D1 positive pole and the resistance R1 other end respectively, and diode D1 negative pole connects diode D2 respectively and bears
Pole, electric capacity C2, LED 1 positive pole, relay J2 coil, diode D3 negative pole and LED 2 positive pole, send out
Optical diode LED2 negative pole connects resistance R3, and the resistance R3 other end connects diode D3 positive pole, relay J2 contact J2-1 respectively
Pin 1, the relay J2 contact other end and relay J1 contact J1-1, the relay J1 contact J1-1 other end connects electric capacity respectively
The C2 other end, resistance R2, diode D2 positive pole, the 220V alternating current other end and relay J2 contact J2-1 pin 2, relay J2
Contact J2-1 pin 3 connects output end vo, resistance R2 other end connecting luminous diode LED1 negative pole, described relay J1 coil
The other end connects the output end vo other end；Described relay J1 contact J1-1 is normally opened contact.
Operation principle of the present utility model is：Refer to Fig. 1, output end vo two ends connect electrical load, 220V alternating current
Obtain galvanic current after blood pressure lowering, rectification, filtering, when normal electricity consumption, on relay J1 coil produced magnetic field is not
Enough to make J1-1 adhesive, circuit is normally powered to electrical load through relay J2 contact J-1 pin 2 and pin 3.When power supply goes out
Now abnormal, after general power increases to a certain extent, flowing through magnetic field produced by the electric current of relay J1 coil will make normally opened touching
Point J1-1 adhesive, from causing relay J2 adhesive, makes relay contact J2-1 pin 2 get at pin 1, now light emitting diode
LED2 lights, and instruction, because of excessively stream power-off protection, will release this protective effect, only click button after power
Switch S, makes the contact of relay J2 discharge, thus recovering the normal power supply to electrical load.
It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, this practicality can be realized in other specific forms new
Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, this practicality is new
The scope of type is limited by claims rather than described above, it is intended that the containing of equivalency that will fall in claim
All changes in justice and scope are included in this utility model.Any reference in claim should not be considered as limiting
Involved claim.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment only wraps
Containing an independent technical scheme, only for clarity, those skilled in the art should for this narrating mode of description
Using description as an entirety, the technical scheme in each embodiment can also form those skilled in the art through appropriately combined
Understandable other embodiment.
Claims (2)
1. a kind of overcurrent protection control circuit, including resistance R1, key switch S, electric capacity C1, diode D1, relay J1, relay
Device J2, LED 1 are with LED 2 it is characterised in that described key switch S one end connection 220V exchanges
Electric one end, the key switch S other end connects resistance R1, relay J1 coil and electric capacity C1 respectively, and the electric capacity C1 other end connects respectively
Connect diode D1 positive pole and the resistance R1 other end, diode D1 negative pole connects diode D2 negative pole, electric capacity C2, light-emitting diodes respectively
Pipe LED1 positive pole, relay J2 coil, diode D3 negative pole and LED 2 positive pole, LED 2 negative pole is even
Connecting resistance R3, the resistance R3 other end connects diode D3 positive pole, relay J2 contact J2-1 pin 1, relay J2 contact respectively
The other end and relay J1 contact J1-1, the relay J1 contact J1-1 other end connect respectively the electric capacity C2 other end, resistance R2, two
Pole pipe D2 positive pole, the 220V alternating current other end and relay J2 contact J2-1 pin 2, relay J2 contact J2-1 pin 3 connects
Output end vo, resistance R2 other end connecting luminous diode LED1 negative pole, the described relay J1 coil other end connects outfan
The Vo other end.
2. overcurrent protection control circuit according to claim 1 is it is characterised in that described relay J1 contact J1-1 is normal
Open contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620882206.6U CN205945006U (en) | 2016-08-15 | 2016-08-15 | Over -current protective control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620882206.6U CN205945006U (en) | 2016-08-15 | 2016-08-15 | Over -current protective control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205945006U true CN205945006U (en) | 2017-02-08 |
Family
ID=57920435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620882206.6U Expired - Fee Related CN205945006U (en) | 2016-08-15 | 2016-08-15 | Over -current protective control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205945006U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106961093A (en) * | 2017-03-22 | 2017-07-18 | 无锡飞翎电子有限公司 | Washing machine and the short-circuit protection circuit for it |
-
2016
- 2016-08-15 CN CN201620882206.6U patent/CN205945006U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106961093A (en) * | 2017-03-22 | 2017-07-18 | 无锡飞翎电子有限公司 | Washing machine and the short-circuit protection circuit for it |
| CN106961093B (en) * | 2017-03-22 | 2020-04-14 | 无锡飞翎电子有限公司 | Washing machine and short-circuit protection circuit used for same |
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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: 20170208 Termination date: 20180815 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |