CN202889220U - Switching power supply with input overvoltage detection and alarm circuit - Google Patents
Switching power supply with input overvoltage detection and alarm circuit Download PDFInfo
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- CN202889220U CN202889220U CN 201220587515 CN201220587515U CN202889220U CN 202889220 U CN202889220 U CN 202889220U CN 201220587515 CN201220587515 CN 201220587515 CN 201220587515 U CN201220587515 U CN 201220587515U CN 202889220 U CN202889220 U CN 202889220U
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Abstract
The utility model relates to a switching power supply, and in particular relates to a switching power supply with an input overvoltage detection and alarm circuit. The switching power supply comprises two alternating current input interfaces, a fuse which is connected to an alternating current input end circuit, an electro magnetic compatibility (EMC) filtration module which is connected with the output end of the fuse and a rectifier module which is connected with the output end of the EMC filtration module, wherein the output end of the rectifier module is connected with an isolation conversion module, and the output end of the isolation conversion module is connected with an output filtration module. The switching power supply is characterized in that a voltage detection module is connected to the circuit between the alternating current input interfaces and the isolation conversion module and comprises an overvoltage indicator light. When the voltage of the switching power supply is over high, the voltage detection module detects the overvoltage and turns on the indicator light so as to alarm a construction worker to take action, check circuit connection, rearrange wires reasonably and eliminate project risks, so that the safety and construction efficiency of light-emitting diode (LED) advertising, marking and lighting projects are increased.
Description
Technical field
The utility model relates to a kind of Switching Power Supply, is specifically related to the Switching Power Supply of tape input overvoltage detection and warning circuit.
Background technology
In LED advertisement, sign and lighting engineering, use in enormous quantities Switching Power Supply to drive various led light sources, become the way that relevant industries are in fashion.For large engineering project, its power consumption usually reaches tens, hundreds of even upper megawatt.In this case, with our engineering experience, when the three-phase electricity phase-splitting is used, because the problem of construction, usually cause the input voltage of certain phase too high, but cause the danger of Switching Power Supply damage and fire hazard, also make the regular maintenance, repair of requirement of engineering simultaneously, cause the waste of a large amount of manpower and materials.
More harsh is, most of engineering merchants can change Switching Power Supply repeatedly when running into analogue, until because certain reason, power supply was shouldered its engineering time, and the result must be soon after again damage and the maintenance of Switching Power Supply of engineering time.According to statistics, the ratio that this class problem accounts for engineering failure is to one's surprisely high: for the certain user, the power failure that for this reason causes accounts for the 20-30% of all power failures.Usually require the workmen to measure input voltage for addressing this problem, but need so special instrument, and engineering merchant is reluctant the input voltage of positive sense switch power supply, cause very large loss often for thus user, construction party, power supply producer, reduce LED advertisement, sign and lighting engineering efficiency of construction, therefore needed a kind of simple, directly perceived, effective solution badly.
Summary of the invention
The purpose of this utility model is in order to overcome defects and deficiency, to provide a kind of and can automatically detect and the tape input overvoltage detection of indicator cock supply voltage height and the Switching Power Supply of warning circuit.
For achieving the above object, the tape input overvoltage detection that the utility model provides and the Switching Power Supply of warning circuit, comprise that two exchange input interface, the insurance that connects on the ac input end circuit, the EMC filtration module that is connected with the insurance output, the rectification module that is connected with EMC filtration module output, the output of described rectification module is connected with the isolated variable module, the output of described isolated variable module is connected with the output filtering module, its special feature is: be connected with voltage detection module on the circuit between described interchange input interface and the described isolated variable module, described voltage detection module comprises the overvoltage indicator light.
Above-mentioned voltage detection module is connected in two in parallel and exchanges between the input interface.
Above-mentioned voltage detection module comprise two respectively with the input port AC1 that exchanges input interface and be connected, AC2, the output of input port AC1 is connected with halfwave rectifier diode D1, the output of described halfwave rectifier diode D1 is connected with resistance R 1, be connected in parallel to resistance R 2 and resistance R 3 between the output of described resistance R 1 and the described input port AC2, the output of described resistance R 1 is connected in series with resistance R 5 and voltage stabilizing didoe ZD1, be connected in series with the ghyristor circuit that is consisted of by positive-negative-positive triode TR1 and positive-negative-positive triode between the output of described resistance R 1 and the described input port AC2, LED lamp, the two ends of described resistance R 5 are connected in parallel to filter capacitor C1, and described filter capacitor C1 is connected in the BE utmost point two ends of positive-negative-positive triode TR1 simultaneously in parallel.
Above-mentioned isolated variable module comprises power switch, high frequency transformer and secondary rectifying tube.
Technique scheme also comprises and is connected to the feedback loop on the circuit between isolated variable module and the output filtering module output.
The utility model is by being connected with voltage detection module at the circuit that exchanges between input interface and the described isolated variable module, voltage detection module comprises the overvoltage indicator light, when the overtension of Switching Power Supply, voltage detection module detects overtension and makes indicator light bright, remind the workmen to process, check connection, again reasonable line arrangement, eliminate hidden dangers in project, greatly improved LED advertisement, sign and lighting engineering efficiency of construction.
Description of drawings
Fig. 1 is circuit block diagram of the present utility model;
Fig. 2 is voltage detection module circuit diagram of the present utility model;
1, exchanges input interface; 2, insurance; 3, EMC filtration module; 4, rectification module; 5, isolated variable module; 6, output filtering module; 7, voltage detection module; 8, feedback loop.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
The Switching Power Supply of tape input overvoltage detection and warning circuit, comprise that two exchange the insurance 2 that connects on input interface 1, the ac input end circuit, the EMC filtration module 3 that is connected with insurance 2 outputs, the rectification module 4 that is connected with EMC filtration module 3 outputs, the output of rectification module 4 is connected with isolated variable module 5, the output of isolated variable module 5 is connected with output filtering module 6, exchange on the circuit between input interface 1 and the isolated variable module 5 and be connected with voltage detection module 7, voltage detection module comprises the overvoltage indicator light.Preferably, voltage detection module 7 is connected in parallel between two interchange input interfaces 1.Also comprise being connected to and exchange the feedback loop 8 on the circuit between input interface 1 and output filtering module 6 outputs.The isolated variable module comprises power switch, high frequency transformer and secondary rectifying tube.
As a kind of embodiment, voltage detection module 7 comprise two respectively with the input port AC1 that exchanges input interface 1 and be connected, AC2, the output of input port AC1 is connected with halfwave rectifier diode D1, the output of halfwave rectifier diode D1 is connected with resistance R 1, be connected in parallel to resistance R 2 and resistance R 3 between the output of resistance R 1 and the input port AC2, the output of resistance R 1 is connected in series with resistance R 5 and voltage stabilizing didoe ZD1, be connected in series with the ghyristor circuit that is consisted of by positive-negative-positive triode TR1 and positive-negative-positive triode between the output of resistance R 1 and the input port AC2, LED lamp, the two ends of resistance R 5 are connected in parallel to filter capacitor C1, and filter capacitor C1 is connected in the BE utmost point two ends of positive-negative-positive triode TR1 simultaneously in parallel.
The operation principle of voltage detection module 7 is: AC1, AC2 are the input of Switching Power Supply, and D1 carries out halfwave rectifier to the alternating voltage of input.The operating voltage that the voltage divider that R1, R2, R3 consist of and R5, ZD1 form compares mutually.Surpass certain value at the input ac voltage peak value, make the voltage of getting on R2, the R3 surpass the voltage stabilizing value of ZD1, the electric current of ZD1 and R5 of flowing through causes the voltage on the R5 to surpass the BE utmost point operating voltage of TR1, then TR1 starts working, the ghyristor circuit triggering and conducting that is consisted of by TR1 and TR2, the Light-Emitting Diode instant igniting that is used for demonstration, the indication overpressure situation occurs.C1 in this circuit is used for filtering clutter, prevents the false triggering of circuit.
The utility model places voltage detection module 7 before the insurance 2, be between the interchange input interface 1 and insurance 2 of power supply, when overvoltage appears in power circuit, voltage detection module 7 is indicated overpressure conditions, and passes through the overpressure conditions of Light-Emitting Diode instant igniting cue circuit, even follow-up power circuit is because the overvoltage damage, the utility model circuit still can be indicated overpressure conditions, remind operating personnel, prevent from changing simply power supply and cause more damages, reliable operation.
Claims (6)
1. the Switching Power Supply of a tape input overvoltage detection and warning circuit, comprise that two exchange input interface (1), the insurance that connects on the ac input end circuit (2), the EMC filtration module (3) that is connected with insurance (2) output, the rectification module (4) that is connected with EMC filtration module (3) output, the output of described rectification module (4) is connected with isolated variable module (5), the output of described isolated variable module (5) is connected with output filtering module (6), it is characterized in that: be connected with voltage detection module (7) on the circuit between described interchange input interface (1) and the described isolated variable module (5), described voltage detection module comprises the overvoltage indicator light.
2. the Switching Power Supply of tape input overvoltage detection according to claim 1 and warning circuit is characterized in that: described voltage detection module (7) is connected in two in parallel and exchanges between the input interfaces (1).
3. the Switching Power Supply of tape input overvoltage detection according to claim 1 and 2 and warning circuit, it is characterized in that: described voltage detection module (7) comprise two respectively with the input port AC1 that exchanges input interface (1) and be connected, AC2, the output of input port AC1 is connected with halfwave rectifier diode D1, the output of described halfwave rectifier diode D1 is connected with resistance R 1, be connected in parallel to resistance R 2 and resistance R 3 between the output of described resistance R 1 and the described input port AC2, the output of described resistance R 1 is connected in series with resistance R 5 and voltage stabilizing didoe ZD1, be connected in series with the ghyristor circuit that is consisted of by positive-negative-positive triode TR1 and positive-negative-positive triode between the output of described resistance R 1 and the described input port AC2, LED lamp, the two ends of described resistance R 5 are connected in parallel to filter capacitor C1, and described filter capacitor C1 is connected in the BE utmost point two ends of positive-negative-positive triode TR1 simultaneously in parallel.
4. the Switching Power Supply of tape input overvoltage detection according to claim 3 and warning circuit, it is characterized in that: described isolated variable module comprises power switch, high frequency transformer and secondary rectifying tube.
5. the Switching Power Supply of tape input overvoltage detection according to claim 3 and warning circuit is characterized in that: also comprise being connected to the feedback loop (8) on the circuit between isolated variable module (5) and output filtering module (6) output.
6. the Switching Power Supply of tape input overvoltage detection according to claim 4 and warning circuit is characterized in that: also comprise being connected to the feedback loop (8) on the circuit between isolated variable module (5) and output filtering module (6) output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220587515 CN202889220U (en) | 2012-11-09 | 2012-11-09 | Switching power supply with input overvoltage detection and alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220587515 CN202889220U (en) | 2012-11-09 | 2012-11-09 | Switching power supply with input overvoltage detection and alarm circuit |
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| Publication Number | Publication Date |
|---|---|
| CN202889220U true CN202889220U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220587515 Expired - Fee Related CN202889220U (en) | 2012-11-09 | 2012-11-09 | Switching power supply with input overvoltage detection and alarm circuit |
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| CN (1) | CN202889220U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105551396A (en) * | 2016-03-12 | 2016-05-04 | 张蓁蓁 | Advertisement system with prolonged service life |
| CN105573172A (en) * | 2016-01-27 | 2016-05-11 | 姚安宇 | Rotary advertisement screen control circuit |
| CN105590566A (en) * | 2016-03-12 | 2016-05-18 | 徐美琴 | Advertisement system capable of prolonging service life |
| CN107656131A (en) * | 2017-09-25 | 2018-02-02 | 联想(北京)有限公司 | A kind of over-voltage detection circuit and method |
-
2012
- 2012-11-09 CN CN 201220587515 patent/CN202889220U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105573172A (en) * | 2016-01-27 | 2016-05-11 | 姚安宇 | Rotary advertisement screen control circuit |
| CN105573172B (en) * | 2016-01-27 | 2018-12-28 | 姚安宇 | Rotary advertisment screen control circuit |
| CN105551396A (en) * | 2016-03-12 | 2016-05-04 | 张蓁蓁 | Advertisement system with prolonged service life |
| CN105590566A (en) * | 2016-03-12 | 2016-05-18 | 徐美琴 | Advertisement system capable of prolonging service life |
| CN105590566B (en) * | 2016-03-12 | 2016-10-26 | 徐美琴 | A kind of ad system increased the service life |
| CN107656131A (en) * | 2017-09-25 | 2018-02-02 | 联想(北京)有限公司 | A kind of over-voltage detection circuit and method |
| CN107656131B (en) * | 2017-09-25 | 2020-01-31 | 联想(北京)有限公司 | overvoltage detection circuit and method |
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| 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: 20130417 Termination date: 20151109 |
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| EXPY | Termination of patent right or utility model |