CN205610209U - Mains power supply's surge protection circuit - Google Patents
Mains power supply's surge protection circuit Download PDFInfo
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- CN205610209U CN205610209U CN201620341530.7U CN201620341530U CN205610209U CN 205610209 U CN205610209 U CN 205610209U CN 201620341530 U CN201620341530 U CN 201620341530U CN 205610209 U CN205610209 U CN 205610209U
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Abstract
The utility model discloses a mains power supply's surge protection circuit, including rectifier bridge Q, transformer T, diode D1, resistance R1, electric capacity C1 and resistance R2, 220V alternating current one end and transformer T coil L2 are connected respectively to diode D1 positive pole, anodal and the transformer T coil L1 of diode D2 is connected respectively to the 220V alternating current other end, diode D2 negative pole is connected respectively to diode D1 negative pole, resistance R1 and electric capacity C1, the electric capacity C1 other end is the connecting resistance R1 other end respectively, resistance R2 and resistance R3, ground resistance R4 is connected respectively to the resistance R3 other end and diode D3 is anodal, ground resistance R6 and output V2 are connected respectively to diode D3 negative pole, output V1 and rectifier bridge Q pin 2 are connected respectively to the resistance R2 other end. The utility model discloses the voltage sample has been carried out simultaneously to high voltage supply side to 220V exchanges after side and the vary voltage, and the maloperation probability obtains reducing, and the security has obtained the improvement.
Description
Technical field
This utility model relates to a kind of protection circuit, the surge protection circuit of a kind of mains-supplied.
Background technology
The input circuit of Switching Power Supply mostly uses capacitor filtering type rectification circuit, close a floodgate moment at incoming power, owing to the initial voltage on capacitor is zero, capacitor charging transient can form the biggest surge current, particularly high power switching power supply, use the filter capacitor that capacity is bigger, make surge current reach more than 100A.At the surge current that power on moment is the biggest, severe one frequently can lead to input fuse and blows or the burning of contact of closing switch, rectifier bridge overcurrent damage；The lighter also can make air switch close not brake application.Above-mentioned phenomenon all can cause Switching Power Supply normally to work, and is all provided with anti-fluid stopping for this almost all of Switching Power Supply and gushes the soft starting circuit of electric current, to ensure power supply normal and reliability service.Surge protection circuit currently on the market is a lot, but is all individually supply side to be carried out voltage sample control mostly, the situation of maloperation often occurs.
Utility model content
The purpose of this utility model is to provide the surge protection circuit of the mains-supplied that a kind of misuse rate is low, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the following technical scheme of this utility model offer:
nullA kind of surge protection circuit of mains-supplied，Including rectifier bridge Q、Transformator T、Diode D1、Resistance R1、Electric capacity C1 and resistance R2，Described diode D1 positive pole connects 220V alternating current one end and transformator T coil L2 respectively，The 220V alternating current other end connects diode D2 positive pole and transformator T coil L1 respectively，Diode D1 negative pole connects diode D2 negative pole respectively、Resistance R1 and electric capacity C1，The electric capacity C1 other end connects the resistance R1 other end respectively、Resistance R2 and resistance R3，The resistance R3 other end connects earth resistance R4 and diode D3 positive pole respectively，Diode D3 negative pole connects earth resistance R6 and outfan V2 respectively，The resistance R2 other end connects outfan V1 and rectifier bridge Q pin 2 respectively，Rectifier bridge Q pin 3 connects earth resistance R7，The rectifier bridge Q pin 1 connection transformer T coil L1 other end，The rectifier bridge Q pin 4 connection transformer T coil L2 other end.
As this utility model further scheme: described outfan V2 connects single-chip microcomputer detection I/O port.
Compared with prior art, the beneficial effects of the utility model are: this utility model has carried out voltage sampling to the high voltage supply side after 220V AC and transformation simultaneously, and misoperation probability is reduced, and safety is improved.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the surge protection circuit of mains-supplied.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
nullRefer to Fig. 1，In this utility model embodiment，A kind of surge protection circuit of mains-supplied，Including rectifier bridge Q、Transformator T、Diode D1、Resistance R1、Electric capacity C1 and resistance R2，Described diode D1 positive pole connects 220V alternating current one end and transformator T coil L2 respectively，The 220V alternating current other end connects diode D2 positive pole and transformator T coil L1 respectively，Diode D1 negative pole connects diode D2 negative pole respectively、Resistance R1 and electric capacity C1，The electric capacity C1 other end connects the resistance R1 other end respectively、Resistance R2 and resistance R3，The resistance R3 other end connects earth resistance R4 and diode D3 positive pole respectively，Diode D3 negative pole connects earth resistance R6 and outfan V2 respectively，The resistance R2 other end connects outfan V1 and rectifier bridge Q pin 2 respectively，Rectifier bridge Q pin 3 connects earth resistance R7，The rectifier bridge Q pin 1 connection transformer T coil L1 other end，The rectifier bridge Q pin 4 connection transformer T coil L2 other end；Described outfan V2 connects single-chip microcomputer detection I/O port.
Refer to Fig. 1, 220V alternating voltage is through diode D1, after D2 rectification, two-way surge voltage sample circuit is formed with the resistance R2 from high-voltage suppling power sampling by sample resistance R1, through current-limiting resistance R3, divider resistance R4 and coupling speed-up capacitor C1, switch isolation diode D3 delivers to single-chip microcomputer detection I/O port and detects, if detection has recognized surge voltage arrival, single-chip microcomputer cuts out corresponding for electric loading (not shown in figure 1), after treating surge voltage, single-chip microcomputer continues on for electric loading, owing to the high voltage supply side after 220V AC and transformation has been carried out voltage sampling simultaneously, misoperation probability is reduced, safety is improved.
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 in the case of without departing substantially from spirit or essential attributes of the present utility model, it is possible to realize this utility model in other specific forms.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims rather than described above, it is intended that all changes fallen in the implication of equivalency and scope of claim included in this utility model.Should not be considered as limiting involved claim by any reference in claim.
In addition, it is to be understood that, although this specification is been described by according to embodiment, but the most each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should can also be formed, through appropriately combined, other embodiments that it will be appreciated by those skilled in the art that as an entirety, the technical scheme in each embodiment by those skilled in the art.
Claims (2)
- null1. the surge protection circuit of a mains-supplied，Including rectifier bridge Q、Transformator T、Diode D1、Resistance R1、Electric capacity C1 and resistance R2，It is characterized in that，Described diode D1 positive pole connects 220V alternating current one end and transformator T coil L2 respectively，The 220V alternating current other end connects diode D2 positive pole and transformator T coil L1 respectively，Diode D1 negative pole connects diode D2 negative pole respectively、Resistance R1 and electric capacity C1，The electric capacity C1 other end connects the resistance R1 other end respectively、Resistance R2 and resistance R3，The resistance R3 other end connects earth resistance R4 and diode D3 positive pole respectively，Diode D3 negative pole connects earth resistance R6 and outfan V2 respectively，The resistance R2 other end connects outfan V1 and rectifier bridge Q pin 2 respectively，Rectifier bridge Q pin 3 connects earth resistance R7，The rectifier bridge Q pin 1 connection transformer T coil L1 other end，The rectifier bridge Q pin 4 connection transformer T coil L2 other end.
- The surge protection circuit of mains-supplied the most according to claim 1, it is characterised in that described outfan V2 connects single-chip microcomputer detection I/O port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620341530.7U CN205610209U (en) | 2016-04-21 | 2016-04-21 | Mains power supply's surge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620341530.7U CN205610209U (en) | 2016-04-21 | 2016-04-21 | Mains power supply's surge protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205610209U true CN205610209U (en) | 2016-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620341530.7U Expired - Fee Related CN205610209U (en) | 2016-04-21 | 2016-04-21 | Mains power supply's surge protection circuit |
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| Country | Link |
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| CN (1) | CN205610209U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113193792A (en) * | 2021-06-28 | 2021-07-30 | 江苏东成工具科技有限公司 | Input voltage control method |
-
2016
- 2016-04-21 CN CN201620341530.7U patent/CN205610209U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113193792A (en) * | 2021-06-28 | 2021-07-30 | 江苏东成工具科技有限公司 | Input voltage control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yang Yigen Inventor before: Hu Meihua |
|
| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170120 Address after: 523876 Guangdong Province, Dongguan city Changan town Xiabian Jingfu Road No. 8 two floor Patentee after: Dongguan Han Yi Electronics Co., Ltd. Address before: 315700 Ningbo, Xiangshan province Dan Road West Park Road, No. 112 Patentee before: Xiangshan Jie Erde intelligence Science and Technology Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160928 Termination date: 20170421 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |