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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- 239000003990 capacitor Substances 0.000 claims abstract description 41
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 238000007726 management method Methods 0.000 abstract description 12
- 238000013024 troubleshooting Methods 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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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 power technology of single-phase input, especially a fuse fusing warning circuit.
Background
The fuse serves as an overcurrent and current protection device and is widely used for preventing circuit damage. Fuses are generally used in power supply equipment, the fuses are generally connected in series in a circuit power loop, and when the current in the loop exceeds a preset limit value, the fuses are blown to break the circuit, so that other devices in the circuit loop are protected.
In the power management apparatus, the operating state of each power supply is detected by using a computer, and once a certain power supply fuse is blown, it is difficult to quickly determine such a failure.
Therefore, a fuse fusing alarm circuit is needed, which can send a fault signal to a computer when a power fuse is fused, and is convenient to detect.
Disclosure of Invention
The utility model aims to solve the technical problem that a fuse fusing warning circuit is provided, can make things convenient for quick location fuse fusing to with passing to power management system on the fault condition, realize the convenience of remote monitoring automation and maintenance troubleshooting.
In order to realize the purpose of solving the technical problem, the utility model adopts the following technical scheme:
a fuse fusing alarm circuit comprises first to third diodes, first to third capacitors, first to ninth resistors, first and second voltage regulators, a triode and an optocoupler; wherein,
the anode of the first diode is connected with the input end of the fuse, and the cathode of the first diode is connected with the anode of the first capacitor and the first resistor and is used as a rectifier diode; the anode of the second diode is connected with the output end of the fuse, and the cathode of the second diode is connected with the anode of the third capacitor and the fifth resistor and also used as a rectifier diode; the anodes of the first capacitor and the second capacitor are respectively connected with the cathodes of the first diode and the second diode, and the cathodes of the first capacitor and the second capacitor are connected with the anode of the third diode and used as a rectifying filter capacitor; the negative electrode of the third diode is connected with one end of the alternating current loop, which is not connected with the fuse, so that an alarm loop is formed; the first voltage regulator adopts TL431, the other end of the first resistor is connected with the cathode of the first voltage regulator, the third resistor is connected between the cathode and the base of the first voltage regulator, the fourth resistor is connected between the base and the anode of the first voltage regulator, and the anode of the first voltage regulator is connected with the anode of the third diode to form a first voltage regulation loop; the second voltage regulator adopts TL431, the other end of a fifth resistor is connected with the cathode of the second voltage regulator, a seventh resistor is connected between the cathode and the base of the second voltage regulator, an eighth resistor is connected between the base and the anode of the second voltage regulator, and the anode of the second voltage regulator is connected with the anode of a third diode to form a second voltage regulation loop; the second resistor is used as a current limiting resistor and is connected between the cathode of the first voltage regulator and the pin 1 of the optical coupler; the sixth resistor is used as a current-limiting resistor and is connected between the cathode of the second voltage regulator and the base of the triode; the emitter of the triode is connected with the anode of the third diode, and the collector of the triode is connected with the cathode of the first voltage regulator; the ninth resistor is connected between the base electrode of the triode and the transmitter; the third capacitor is connected between pins 1 and 2 of the optical coupler and is used as a delay capacitor for preventing misoperation of the optical coupler; a pin 1 of the optical coupler is connected with the second resistor, a pin 2 is connected with the anode of the third diode, and pins 3 and 4 externally provide a fuse fusing alarm signal for the power management system; and the cathode of the first capacitor, the cathode of the second capacitor, the anode of the first voltage regulator, the anode of the second voltage regulator, the emitter of the triode and the 2 pins of the optocoupler are all connected to the anode of the third diode, and the power ground is defined.
More specifically, the optocoupler type in the circuit is TLP521-1, which is a dc input and NPN triode output optocoupler, pin 1 is an anode of an input end light emitting diode, pin 2 is a cathode of the input end light emitting diode, pin 3 is an emitter of an output end light receiving triode, and pin 4 is a collector of the output end light receiving triode.
When the circuit works normally, the first diode and the second triode input alternating current voltage, the direct current voltage is output through the rectification and filtering of the first diode, the second diode, the first capacitor and the third capacitor, the direct current voltage outputs 7.5V through the third resistor, the fourth resistor, the voltage regulator, the seventh resistor, the eighth resistor and the voltage regulating circuit of the second voltage regulator, wherein the 7.5V voltage output by the second voltage regulator is limited by the sixth resistor and then output to the base electrode of the triode to drive the triode to be conducted, the 7.5V voltage output by the first voltage regulator is output to the collector electrode of the triode and is pulled down to below 1V by the triode, this voltage passes through current-limiting resistance second resistance output to 1 foot of opto-coupler, because the current-limiting effect of second resistance leads to the electric current not enough and can't drive the opto-coupler and switch on, and the fuse alarm signal that power management system received at this moment is normal.
When the fuse is fused, no current is input into 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-working state. And after the 7.5V voltage output by the first voltage regulator is limited by the second resistor, the optocoupler is sufficiently pushed to be conducted, so that a fuse alarm signal received by the power management system is a fault.
By adopting the technical scheme, the utility model discloses following beneficial effect has:
the fuse fusing alarm circuit of this patent can make things convenient for quick location fuse fusing to pass through power management system in with the fault conditions, realize the convenience of remote monitoring automation and maintenance troubleshooting. The circuit can be widely applied to various power supply fields, and particularly can be popularized and applied to the field of power supply management systems with higher requirements on automation performance.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
In the figure, 1 is a first diode, 2, 9 and 15 are respectively a first capacitor, a second capacitor and a third capacitor, and 3, 4, 5, 6, 10, 11, 12, 13 and 17 are respectively a first resistor, a second resistor, a third resistor and a ninth resistor; 7. 14 are a first voltage regulator and a second voltage regulator respectively; 16 is an optical coupler; 18 is a triode, 8-the second diode, 19-the third diode.
Detailed Description
The patent is further explained below with reference to the drawings.
As shown in fig. 1, in the fuse blowout alarm circuit of the present invention, the anode of the diode 1 is connected to the fuse input end, and the cathode of the diode 1 is connected to the anode of the capacitor 2 and the resistor 3, and is used as a rectifier diode. The anode of the diode 8 is connected with the output end of the fuse, the cathode of the diode 8 is connected with the anode of the capacitor 9 and the resistor 10, and the diode is also used as a rectifier diode. The positive electrodes of the capacitors 2 and 9 are connected to the negative electrodes of the diodes 1 and 8, respectively, and the negative electrodes of the capacitors 2 and 9 are connected to the positive electrode of the diode 19, respectively, and are used as rectifier filter capacitors. The negative pole of the diode 19 is connected with one end of the alternating current loop, which is not connected with the fuse, so as to form an alarm loop. The voltage regulator 7 adopts TL431, and resistors 5, 6 and 7 form a voltage regulating circuit. The voltage regulator 14 adopts TL431, and the resistors 12, 13 and 14 form a voltage regulating circuit. Resistor 11 is connected between the cathode of 14 and the base of transistor 18 as a current limiting resistor. The emitter of the triode 18 is connected with the anode of the diode 19, and the collector is connected with the cathode of the voltage regulator 7. The resistor 4 is used as a current limiting resistor and is connected between the cathode of the resistor 7 and the pin 1 of the optical coupler. The capacitor 15 is connected between the pins 1 and 2 of the optical coupler and is used as a delay capacitor for preventing the misoperation of the optical coupler. A pin 1 of the optocoupler 16 is connected with a resistor 4, and a pin 2 is connected with the anode of the diode 19, so that a fuse fusing alarm signal is provided for a power management system.
When the fuse alarm device works normally, alternating current voltage is input into the diodes 1 and 8, direct current voltage is output through rectification filtering of the diodes 1, 8, 2 and 9, the direct current voltage outputs 7.5V direct current voltage through the voltage adjusting circuit of the diodes 5, 6, 7, 12, 13 and 14, the 7.5V voltage output by the diode 14 is limited through the current limiting resistor 11 and then is output to the base electrode of the triode 18 to drive the triode to be conducted, the 7.5V voltage output by the diode 7 is output to the collector electrode of the triode 18 and is reduced to below 1V by the triode 18, the voltage is output to the pin 1 of the optocoupler 16 through the current limiting resistor 4, the pin 16 cannot be driven to be conducted due to insufficient current, and at the moment, a fuse alarm signal received by the power management system is normal.
When the fuse is blown, no current is input to the diode 8, and the current is not input to the diodes 8, 18, 14, 9, 10, 12, 13, 11 and 17. And after the 7.5V voltage output by the 7 is limited by the 4 current, the optocoupler 16 is sufficiently pushed to be conducted, so that a fuse alarm signal received by the power management system is a fault.
Claims (2)
1. A fuse fusing alarm circuit is characterized in that: the circuit comprises first to third diodes, first to third capacitors, first to ninth resistors, first and second voltage regulators, a triode and an optocoupler; wherein:
the anode of the first diode is connected with the input end of the fuse, and the cathode of the first diode is connected with the anode of the first capacitor and the first resistor and is used as a rectifier diode; the anode of the second diode is connected with the output end of the fuse, and the cathode of the second diode is connected with the anode of the third capacitor and the fifth resistor and also used as a rectifier diode; the anodes of the first capacitor and the second capacitor are respectively connected with the cathodes of the first diode and the second diode, and the cathodes of the first capacitor and the second capacitor are connected with the anode of the third diode and used as a rectifying filter capacitor; the negative electrode of the third diode is connected with one end of the alternating current loop, which is not connected with the fuse, so that an alarm loop is formed; the first voltage regulator adopts TL431, the other end of the first resistor is connected with the cathode of the first voltage regulator, the third resistor is connected between the cathode and the base of the first voltage regulator, the fourth resistor is connected between the base and the anode of the first voltage regulator, and the anode of the first voltage regulator is connected with the anode of the third diode to form a first voltage regulation loop; the second voltage regulator adopts TL431, the other end of a fifth resistor is connected with the cathode of the second voltage regulator, a seventh resistor is connected between the cathode and the base of the second voltage regulator, an eighth resistor is connected between the base and the anode of the second voltage regulator, and the anode of the second voltage regulator is connected with the anode of a third diode to form a second voltage regulation loop; the second resistor is used as a current limiting resistor and is connected between the cathode of the first voltage regulator and the pin 1 of the optical coupler; the sixth resistor is used as a current-limiting resistor and is connected between the cathode of the second voltage regulator and the base of the triode; the emitter of the triode is connected with the anode of the third diode, and the collector of the triode is connected with the cathode of the first voltage regulator; the ninth resistor is connected between the base electrode of the triode and the transmitter; the third capacitor is connected between pins 1 and 2 of the optical coupler and is used as a delay capacitor for preventing misoperation of the optical coupler; a pin 1 of the optical coupler is connected with the second resistor, a pin 2 is connected with the anode of the third diode, and pins 3 and 4 externally provide a fuse fusing alarm signal for the power management system; and the cathode of the first capacitor, the cathode of the second capacitor, the anode of the first voltage regulator, the anode of the second voltage regulator, the emitter of the triode and the 2 pins of the optocoupler are all connected to the anode of the third diode, and the power ground is defined.
2. The circuit of claim 1, wherein: the type of the optocoupler is TLP521-1, the optocoupler is a direct current input and NPN triode output type optocoupler, a pin 1 is an anode of a light emitting diode at an input end, a pin 2 is a cathode of the light emitting diode at the input end, a pin 3 is an emitter of a light receiving triode at an output end, and a pin 4 is a collector of the light receiving triode at the output end.
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 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202975237U true CN202975237U (en) | 2013-06-05 |
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Family Applications (1)
| 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 |