CN201234122Y - Self-protection switch electric power - Google Patents
Self-protection switch electric power Download PDFInfo
- Publication number
- CN201234122Y CN201234122Y CNU2008201501445U CN200820150144U CN201234122Y CN 201234122 Y CN201234122 Y CN 201234122Y CN U2008201501445 U CNU2008201501445 U CN U2008201501445U CN 200820150144 U CN200820150144 U CN 200820150144U CN 201234122 Y CN201234122 Y CN 201234122Y
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- power supply
- self
- detection module
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Abstract
The utility model relates to a self-protection switch power supply, which comprises an input circuit, a conversion circuit, an output circuit and a control chip, wherein the conversion circuit includes a switch device, and a transformer connected with the switch device; the self-protection switch power supply further includes a circuit protection unit connected with each of the above circuits; the circuit protection unit includes an over-voltage and under-voltage detection module, a start delay module, a current detection module, and a relay operation and locking module; and the over-voltage and under-voltage detection module, the start delay module, the current detection module and the delay pull-in and lock module are connected with a control chip. Compared with the prior art, the self-protection switch power supply has the advantages of high self-protection capability and convenient use. When failure occurs, the switch power supply can stop operating, and the relay contacts are pulled in and locked until the failure is eliminated by users.
Description
Technical field
The utility model relates to Switching Power Supply, particularly relates to a kind of self-shield Switching Power Supply.
Background technology
At present, the production of Switching Power Supply and use are very general, and the Switching Power Supply of most of manufacturer production also can be accomplished output ripple less than 50mV, and antijamming capability is stronger.
But, the Switching Power Supply that does not also have the self-shield ability on the market, (the overcurrent of existing Switching Power Supply, overvoltage, under-voltage etc.) protection, all be relay point moving contact pattern: when breaking down, just formed the relay contact adhesive, Switching Power Supply quits work, relay loses voltage like this, the contact is just decontroled naturally, and Switching Power Supply brings into operation again, should not fix a breakdown, so relay contact adhesive once more, Switching Power Supply quits work again, and the cyclic process that so goes round and begins again finally causes Switching Power Supply to be damaged; Perhaps when relay contact moment adhesive, the user provides electronic circuit for oneself and carries out safeguard measure, and Switching Power Supply is closed, and cuts off the input power supply, reruns after waiting to fix a breakdown.
Summary of the invention
Technical problem to be solved in the utility model is exactly to provide a kind of self-shield Switching Power Supply for the defective that overcomes above-mentioned prior art existence.
The purpose of this utility model can be achieved through the following technical solutions: the self-shield Switching Power Supply; comprise input circuit; translation circuit; output circuit; control chip; described translation circuit comprises switching device; and the transformer that is connected with switching device; it is characterized in that; also comprise the circuit protection unit that is connected with above-mentioned each circuit; described circuit protection unit comprises the over-and under-voltage detection module; start time delay module; current detection module; relay adhesive and locking module, described over-and under-voltage detection module; start time delay module; current detection module all is connected with control chip with relay adhesive and locking module.
Compared with prior art, the utility model self-shield ability is strong, and is easy to use, and when Switching Power Supply broke down, Switching Power Supply quit work, and relay contact adhesive and locking are till the user fixes a breakdown.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model;
Fig. 2 is the electrical block diagram of the over-and under-voltage detection module of the utility model embodiment;
Fig. 3 is the electrical block diagram of the current detection module of the utility model embodiment;
Fig. 4 is the electrical block diagram of the startup time delay module of the utility model embodiment;
Fig. 5 is the relay adhesive of the utility model embodiment and the electrical block diagram of locking module.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Shown in Fig. 1～5; the self-shield Switching Power Supply; comprise input circuit 1; translation circuit 2; output circuit 3; control chip 4; described translation circuit 2 comprises switching device 21; and the transformer 22 that is connected with switching device 21; it is characterized in that; also comprise the circuit protection unit 5 that is connected with above-mentioned each circuit; described circuit protection unit 5 comprises over-and under-voltage detection module 51; start time delay module 52; current detection module 53; relay adhesive and locking module 54, described over-and under-voltage detection module 51; start time delay module 52; current detection module 53 all is connected with control chip 4 with relay adhesive and locking module 54.
When control chip 4 detects: output voltage is greater than setting voltage (overvoltage), output voltage is less than setting voltage (under-voltage), and output current is greater than setting electric current (overcurrent), when electric current infinity (short circuit) or field effect transistor temperature surpass uniform temperature (overheated), quit work lock-up relay.
A series of the present utility model:
Series A: input (5,8,12,15,18,24,36,48) V/3A
Input voltage (85-260VAC) output Vout-VDC
Embodiment
1, over-and under-voltage detects, and as Fig. 2: voltage sampling signal has output voltage V CC through (R34, R35, R36) dividing potential drop, from (R34, R35) middle the heart channel of Hang-Shaoyin current-limiting resistance R33 flows into optocoupler (IC9) PC817A, optocoupler flows to comparator (IC4_1, IC4_2) the LM339_4 pin is V4, and the LM339_7 pin is V7, as V7 during greater than V6 (being set at 2.5V), (IC4_1) LM339_1 pin output high level, through diode D7 drive optocoupler (IC7, IC8), V6 is (IC4_1) LM339_6 pin voltage;
2, current detecting, as Fig. 3: voltage sampling signal has output voltage V CC through (R34, R35, R36) dividing potential drop, from (R34, R35) middle the heart channel of Hang-Shaoyin current-limiting resistance R33 flows into optocoupler (IC9) PC817A, and optocoupler flows to comparator, (IC4_1, IC4_2) the LM339_4 pin is V4, the LM339_7 pin is V7; As V4 during less than V5 (being set at 2.2V), (IC4_2) LM339_2 pin output high level, through diode D8 drive optocoupler (IC7, IC8), V5 is (IC4_2) LM339_5 pin voltage;
3, start time-delay, as Fig. 4: because when powering on, the output of Switching Power Supply reached set point after will delaying time 0.5 second, and the control detection circuit powered on speed less than 0.5 second, if do not delay time, then detection signal is always error protection, Switching Power Supply can't operate as normal, so when powering on, 5V voltage is through (R32, C21) time-delay is after 1 second, (IC4_4) the LM339_11 pin be V11 greater than V10 (being set at 2.5V), at this moment, triode Q4 conducting, (IC4_4) LM339_14 pin output high level, (IC7 IC8) draws into the loop to optocoupler, and V10 is (IC4_4) LM339_10 voltage;
4, relay adhesive and locking module, as Fig. 5: after the time-delay process finished, (R26 Q4) drew into the loop for IC7, IC8, and when breaking down, ((D7, D8 D9) are the logic OR circuit, relay adhesive and locking, Switching Power Supply stop for IC7, IC8) conducting simultaneously.
Claims (1)
1. self-shield Switching Power Supply; comprise input circuit, translation circuit, output circuit, control chip; described translation circuit comprises switching device; and the transformer that is connected with switching device; it is characterized in that; also comprise the circuit protection unit that is connected with above-mentioned each circuit; described circuit protection unit comprises the over-and under-voltage detection module, starts time delay module, current detection module, relay adhesive and locking module, and described over-and under-voltage detection module, startup time delay module, current detection module all are connected with control chip with relay adhesive and locking module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201501445U CN201234122Y (en) | 2008-06-27 | 2008-06-27 | Self-protection switch electric power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201501445U CN201234122Y (en) | 2008-06-27 | 2008-06-27 | Self-protection switch electric power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201234122Y true CN201234122Y (en) | 2009-05-06 |
Family
ID=40620511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201501445U Expired - Fee Related CN201234122Y (en) | 2008-06-27 | 2008-06-27 | Self-protection switch electric power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201234122Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105006959A (en) * | 2015-07-27 | 2015-10-28 | 上海沪工焊接集团股份有限公司 | Inversion power supply slow-start control circuit and control method |
-
2008
- 2008-06-27 CN CNU2008201501445U patent/CN201234122Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105006959A (en) * | 2015-07-27 | 2015-10-28 | 上海沪工焊接集团股份有限公司 | Inversion power supply slow-start control circuit and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090506 Termination date: 20130627 |