CN202975237U - Fuse burn-out alarm circuit - Google Patents
Fuse burn-out alarm circuit Download PDFInfo
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- CN202975237U CN202975237U CN2012202191372U CN201220219137U CN202975237U CN 202975237 U CN202975237 U CN 202975237U CN 2012202191372 U CN2012202191372 U CN 2012202191372U CN 201220219137 U CN201220219137 U CN 201220219137U CN 202975237 U CN202975237 U CN 202975237U
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Abstract
The utility model discloses a fuse burn-out alarm circuit, comprising first to third diodes, first to third capacitors, first to ninth resistors, first and second voltage regulators, a triode and an optical coupler. After the fuse is burned out, zero current is input to the second diode, and the second diode, the triode, the second voltage regulator, the third capacitor, the fifth resistor, the seventh resistor, the eighth resistor, the sixth resistor and the ninth capacitor are in a non-work state, the voltage output by the first voltage regulator promotes the conduction of the optical coupler after current limiting of the second resistor, and the fuse alarm signal received by a power supply management system is a fault. According to the fuse burn-out alarm circuit provided in the utility model, the fuse burn-out problem is conveniently and rapidly positioned, the fault is uploaded to the power supply management system, and automatic remote monitor and the convenient troubleshooting are realized.
Description
Technical field
The utility model relates to a kind of power technology of single-phase input, particularly a kind of fuse burn-out alarm circuit.
Background technology
Fuse is as a kind of overcurrent, current protective device, and it is used for widely preventing that circuit from damaging.Generally all can use fuse in power-supply device, fuse generally is serially connected in the circuit power loop, after electric current in the loop surpasses preset limit value, and blown fuse disconnecting circuit, other devices in the holding circuit loop.
In power supply management device, use the duty of each power supply of COMPUTER DETECTION, in case the situation of certain main fuse fusing occurs, be difficult to judge fast such fault.
Therefore, need a kind of fuse burn-out alarm circuit, can send fault-signal to computing machine in main fuse fusing, the convenient detection.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of fuse burn-out alarm circuit, fuse-positioning fusing easily and fast, and failure condition is uploaded to power-supply management system, realize remote monitoring robotization and the convenience of keeping in repair troubleshooting.
For the purpose that realizes solving the problems of the technologies described above, the utility model has adopted following technical scheme:
A kind of fuse burn-out alarm circuit comprises the first to the 3rd diode, the first to the 3rd electric capacity, the first to the 9th resistance, the first and second voltage adjusters, triode, optocoupler; Wherein,
The positive pole of the first diode connects the fuse input end, and the negative pole of the first diode connects the first capacitance cathode and the first resistance, uses as a commutation diode; The positive pole of the second diode connects the fuse output terminal, and the negative pole of the second diode connects positive pole and the 5th resistance of the 3rd electric capacity, also uses as a commutation diode; The positive pole of the first electric capacity, the second electric capacity connects respectively the negative pole of the first diode, the second diode, and the negative pole of the first electric capacity, the second electric capacity connects the positive pole of the 3rd diode, uses as rectifying and wave-filtering electric capacity; The negative pole of the 3rd diode connects an end that does not connect fuse in ac circuit, forms alarm circuit; The first voltage adjuster adopts TL431, the negative electrode of another termination the first voltage adjuster of the first resistance, the 3rd resistance is connected between the negative electrode and ground level of the first voltage adjuster, the 4th resistance is connected between the base stage and anode of the first voltage adjuster, the anode of the first voltage adjuster is received the positive pole of the 3rd diode, forms the first voltage and adjusts the loop; The second voltage adjuster adopts TL431, the negative electrode of another termination second voltage adjuster of the 5th resistance, the 7th resistance is connected between the negative electrode and ground level of second voltage adjuster, the 8th resistance is connected between the base stage and anode of second voltage adjuster, the anode of second voltage adjuster is received the positive pole of the 3rd diode, forms second voltage and adjusts the loop; The second resistance is as current-limiting resistance, is connected between 1 pin of the negative electrode of the first voltage regulator and optocoupler; The 6th resistance is as current-limiting resistance, is connected between the base stage of the negative electrode of second voltage adjuster and triode; Transistor emitter connects the positive pole of the 3rd diode, and collector connects the negative electrode of the first voltage regulator; The 9th resistance is connected between the base stage and transmitter of triode; The 3rd electric capacity connects between 1,2 pin of optocoupler, uses as the delay capacitor that prevents the optocoupler misoperation; 1 pin of optocoupler connects the second resistance, and 2 pin connect the positive pole of the 3rd diode, and 3 pin, 4 pin externally provide the blown fuse alerting signal for power-supply management system; Wherein 2 pin of the emitter of the anode of the anode of the negative pole of the negative pole of the first electric capacity, the second electric capacity, the first voltage regulator, second voltage regulator, triode, optocoupler all are connected to the positive pole of the 3rd diode, are defined as power supply ground.
Further concrete, optocoupler model in this circuit is TLP521-1, it is the optocoupler of a kind of direct current input, NPN triode output type, 1 pin is the anode of input end light emitting diode, 2 pin are the negative electrode of the light emitting diode of input end, 3 pin are the emitter of the illuminated triode of output terminal, and 4 pin are the collector of the illuminated triode of output terminal.
during normal operation, the first diode and the equal input ac voltage of the second triode, by the first diode, the second diode, the first electric capacity, the rectifying and wave-filtering output dc voltage of the 3rd electric capacity, DC voltage is by the 3rd resistance, the 4th resistance, voltage regulator and the 7th resistance, the 8th resistance, DC voltage 7.5V of voltage-regulating circuit output of second voltage regulator, wherein the 7.5V voltage of second voltage regulator output outputs to the base stage of triode after by the 6th resistance current limliting, drive the triode conducting, the 7.5V Voltage-output of the first voltage regulator output is to the collector of triode, be pulled low to below 1V by triode, this voltage exports 1 pin of optocoupler to by current-limiting resistance the second resistance, metering function due to the second resistance, cause electric current can't drive the optocoupler conducting not, the fuse alarm signal that this moment, power-supply management system received is for normal.
After blown fuse, the second diode no current input, the second diode, triode, second voltage regulator, the 3rd electric capacity, the 5th resistance, the 7th resistance, the 8th resistance, the 6th resistance, the 9th electric capacity all are in off position.And the 7.5V voltage of the first voltage regulator output enough promotes the optocoupler conducting by after the second resistance current limliting, and making the fuse alarm signal that power-supply management system receives is fault.
By adopting technique scheme, the utlity model has following beneficial effect:
The fuse burn-out alarm circuit of this patent, fuse-positioning fusing easily and fast, and failure condition is uploaded to power-supply management system, realize remote monitoring robotization and the convenience of keeping in repair troubleshooting.But the various field of power supplies of this circuit widespread use more can be applicable robotization performance requirement higher power-supply management system field especially.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
In figure, 1-the first diode, 2,9,15 are respectively first, second, third electric capacity, and 3,4,5,6,10,11,12,13,17 are respectively the first to the 9th resistance; 7,14 be respectively first, second voltage regulator; 16 is optocoupler; 18 is triode, 8-the second diode, 19-the 3rd diode.
Embodiment
Below by accompanying drawing, this patent is further explained explanation.
As shown in Figure 1, in a kind of fuse burn-out alarm circuit of this patent, the positive pole of diode 1 connects the fuse input end, and the negative pole of diode 1 connects electric capacity 2 positive pole and resistance 3, uses as a commutation diode.The positive pole of diode 8 connects the fuse output terminal, and the negative pole of diode 8 connects positive pole and the resistance 10 of electric capacity 9, also uses as a commutation diode.Electric capacity 2,9 positive pole connect respectively diode 1,8 negative pole, and electric capacity 2,9 negative pole connect the positive pole of diode 19, use as rectifying and wave-filtering electric capacity.The negative pole of diode 19 connects an end that does not connect fuse in ac circuit, forms alarm circuit.Voltage adjuster 7 adopts TL431, and resistance 5,6 and 7 forms regulating circuit.Voltage adjuster 14 adopts TL431, and resistance 12,13 and 14 forms regulating circuit.Resistance 11 is as current-limiting resistance, is connected between the base stage of 14 negative electrode and triode 18.Triode 18 emitters connect the positive pole of diode 19, and collector connects the negative electrode of voltage regulator 7.Resistance 4 is as current-limiting resistance, is connected between 1 pin of 7 negative electrode and optocoupler.Electric capacity 15 connects between 1,2 pin of optocoupler, uses as the delay capacitor that prevents the optocoupler misoperation.1 pin connecting resistance 4,2 pin of optocoupler 16 connect the positive pole of diode 19, for power-supply management system provides the blown fuse alerting signal.
during normal operation, diode 1 and 8 equal input ac voltages, by 1, 8, 2, 9 rectifying and wave-filtering output dc voltage, DC voltage is by 5, 6, 7 and 12, 13, DC voltage 7.5V of voltage-regulating circuit output of 14, wherein the 7.5V voltages of 14 outputs output to the base stage of triode 18 after by 11 current limlitings, drive the triode conducting, the 7.5V Voltage-output of 7 outputs is to the collector of triode 18, be pulled low to below 1V by triode 18, this voltage exports 1 pin of optocoupler 16 to by current-limiting resistance 4, because electric current can't drive 16 conductings not, the fuse alarm signal that this moment, power-supply management system received is for normal.
After blown fuse, diode 8 no current inputs, 8,18,14,9,10,12,13,11,17 all are in off position.And the 7.5V voltage of 7 outputs enough promotes optocoupler 16 conductings by after 4 current limlitings, and making the fuse alarm signal that power-supply management system receives is fault.
Claims (2)
1. a fuse burn-out alarm circuit, is characterized in that: comprise the first to the 3rd diode, the first to the 3rd electric capacity, the first to the 9th resistance, the first and second voltage adjusters, triode, optocoupler; Wherein:
The positive pole of the first diode connects the fuse input end, and the negative pole of the first diode connects the first capacitance cathode and the first resistance, uses as a commutation diode; The positive pole of the second diode connects the fuse output terminal, and the negative pole of the second diode connects positive pole and the 5th resistance of the 3rd electric capacity, also uses as a commutation diode; The positive pole of the first electric capacity, the second electric capacity connects respectively the negative pole of the first diode, the second diode, and the negative pole of the first electric capacity, the second electric capacity connects the positive pole of the 3rd diode, uses as rectifying and wave-filtering electric capacity; The negative pole of the 3rd diode connects an end that does not connect fuse in ac circuit, forms alarm circuit; The first voltage adjuster adopts TL431, the negative electrode of another termination the first voltage adjuster of the first resistance, the 3rd resistance is connected between the negative electrode and ground level of the first voltage adjuster, the 4th resistance is connected between the base stage and anode of the first voltage adjuster, the anode of the first voltage adjuster is received the positive pole of the 3rd diode, forms the first voltage and adjusts the loop; The second voltage adjuster adopts TL431, the negative electrode of another termination second voltage adjuster of the 5th resistance, the 7th resistance is connected between the negative electrode and ground level of second voltage adjuster, the 8th resistance is connected between the base stage and anode of second voltage adjuster, the anode of second voltage adjuster is received the positive pole of the 3rd diode, forms second voltage and adjusts the loop; The second resistance is as current-limiting resistance, is connected between 1 pin of the negative electrode of the first voltage regulator and optocoupler; The 6th resistance is as current-limiting resistance, is connected between the base stage of the negative electrode of second voltage adjuster and triode; Transistor emitter connects the positive pole of the 3rd diode, and collector connects the negative electrode of the first voltage regulator; The 9th resistance is connected between the base stage and transmitter of triode; The 3rd electric capacity connects between 1,2 pin of optocoupler, uses as the delay capacitor that prevents the optocoupler misoperation; 1 pin of optocoupler connects the second resistance, and 2 pin connect the positive pole of the 3rd diode, and 3 pin, 4 pin externally provide the blown fuse alerting signal for power-supply management system; Wherein 2 pin of the emitter of the anode of the anode of the negative pole of the negative pole of the first electric capacity, the second electric capacity, the first voltage regulator, second voltage regulator, triode, optocoupler all are connected to the positive pole of the 3rd diode, are defined as power supply ground.
2. fuse burn-out alarm circuit according to claim 1, it is characterized in that: described optocoupler model is TLP521-1, it is the optocoupler of a kind of direct current input, NPN triode output type, 1 pin is the anode of input end light emitting diode, 2 pin are the negative electrode of the light emitting diode of input end, 3 pin are the emitter of the illuminated triode of output terminal, and 4 pin are the collector of the illuminated triode of output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202191372U CN202975237U (en) | 2012-05-16 | 2012-05-16 | Fuse burn-out alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202191372U CN202975237U (en) | 2012-05-16 | 2012-05-16 | Fuse burn-out alarm circuit |
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| Publication Number | Publication Date |
|---|---|
| CN202975237U true CN202975237U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202191372U Expired - Fee Related CN202975237U (en) | 2012-05-16 | 2012-05-16 | Fuse burn-out alarm circuit |
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| CN (1) | CN202975237U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499767A (en) * | 2013-10-21 | 2014-01-08 | 刘海先 | Electronic instrument input fuse monitoring device |
| CN104851763A (en) * | 2015-05-26 | 2015-08-19 | 苏州福利恒电子科技有限公司 | Fuse monitoring circuit |
| CN108614186A (en) * | 2018-07-02 | 2018-10-02 | 优利德科技(中国)股份有限公司 | The device and method of automatic detection protective tube fusing |
-
2012
- 2012-05-16 CN CN2012202191372U patent/CN202975237U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499767A (en) * | 2013-10-21 | 2014-01-08 | 刘海先 | Electronic instrument input fuse monitoring device |
| CN104851763A (en) * | 2015-05-26 | 2015-08-19 | 苏州福利恒电子科技有限公司 | Fuse monitoring circuit |
| CN108614186A (en) * | 2018-07-02 | 2018-10-02 | 优利德科技(中国)股份有限公司 | The device and method of automatic detection protective tube fusing |
| CN108614186B (en) * | 2018-07-02 | 2024-03-12 | 优利德科技(中国)股份有限公司 | Device and method for automatically detecting fusing of fuse tube |
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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: 20130605 Termination date: 20190516 |