CN220085462U - Alarm driving circuit for arc extinction - Google Patents
Alarm driving circuit for arc extinction Download PDFInfo
- Publication number
- CN220085462U CN220085462U CN202321596434.3U CN202321596434U CN220085462U CN 220085462 U CN220085462 U CN 220085462U CN 202321596434 U CN202321596434 U CN 202321596434U CN 220085462 U CN220085462 U CN 220085462U
- Authority
- CN
- China
- Prior art keywords
- pin
- photoelectric coupler
- resistor
- input voltage
- triode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000008033 biological extinction Effects 0.000 title description 7
- 239000003990 capacitor Substances 0.000 claims abstract description 12
- 230000005856 abnormality Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 description 2
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Electronic Switches (AREA)
Abstract
The utility model provides an arc extinguishing alarm driving circuit, wherein a collector electrode of a triode Q1 is respectively connected with a first input voltage and a 3 rd pin of a photoelectric coupler U7, the first input voltage is connected with a 2 nd pin of the photoelectric coupler U7, a 5 th pin of the photoelectric coupler U7 is grounded, a 6 th pin of the photoelectric coupler U7 is used for outputting a control signal, a 6 th pin of the photoelectric coupler U7 is also connected with one end of a resistor R21, the other end of the resistor R21 is connected with a second input voltage, a 1 st pin of the photoelectric coupler U7 is connected with the second input voltage, a 7 th pin of the photoelectric coupler U7 is connected with the second input voltage through a resistor R13, one end of a capacitor C28 is connected with the second input voltage, the other end of the capacitor C28 is grounded, and the photoelectric coupler U7 is used for converting an input voltage value into a digital level value, so that the alarm control is conveniently carried out by an access controller.
Description
Technical Field
The utility model relates to the technical field of power circuits, in particular to an alarm driving circuit for arc extinction.
Background
In the current electronic circuit technology, the alarm circuit is widely applied to various power utilization occasions, and needs to be applied to industrial production, such as chemical operations, part manufacturing equipment, large-scale detection equipment and the like, from small to small intelligent electronic equipment and household appliances. The alarm circuit can remind people that certain functions of a system or equipment are faulty and needs to be positioned and maintained in time so as to ensure the normal operation of the system or equipment, in a power system, because high-voltage electricity such as a zero line and a fire wire is commonly connected to the system or equipment, if the situation of short circuit of the zero line and the fire wire occurs in the use process, sparks are extremely easy to generate certain potential safety hazards to the whole system, and the complexity of the adopted alarm circuit is different for different systems and equipment, such as a Chinese patent application number 202221116207.1 and a bulletin day 2022.09.02, the alarm circuit comprises one or more input resistors, diodes, triodes, photoelectric couplers, an alarm module, a first input voltage and a second input voltage, wherein the diodes, the triodes, the photoelectric couplers and the alarm module are in one-to-one correspondence with the resistors; one end of the input resistor is connected with one path of alarm signal, and the other end of the input resistor is connected with the anode of the corresponding diode; the negative electrode of the diode is connected with the base electrode of the triode, the emitting electrode of the triode is connected with the input end of the photoelectric coupler, and the collecting electrode of the triode is connected with the first input voltage; the output end of the photoelectric coupler is connected with the second input voltage after being connected with the warning module in series, so that effective and reliable fault warning can be realized, and the practicability is high. But the circuit directly provides an alarm for the buzzer and the light-emitting diode through the triode output end of the photoelectric coupler, and the output voltage value of the circuit is not converted into a logic level signal for outputting, so that the circuit is inconvenient to directly control through the access controller, and inconvenient to control.
Disclosure of Invention
The utility model provides an alarm driving circuit for arc extinction, which can better ensure that a photoelectric coupler can work normally and is convenient to access a controller for alarm control.
In order to achieve the above objective, an alarm driving circuit for arc extinction includes a photo coupler U7, a resistor R14, a resistor R21, a resistor R13, a triode Q1 and a capacitor C28, wherein a signal input end is connected with one end of the resistor R14, the other end of the resistor R14 is connected with a base electrode of the triode Q1, a collector electrode of the triode Q1 is respectively connected with a first input voltage and a 3 rd pin of the photo coupler U7, the first input voltage is connected with a 2 nd pin of the photo coupler U7, a 5 th pin of the photo coupler U7 is grounded, a 6 th pin of the photo coupler U7 is used for outputting a control signal, a 6 th pin of the photo coupler U7 is also connected with one end of the resistor R21, the other end of the resistor R21 is connected with a second input voltage, a 1 st pin of the photo coupler U7 is connected with the second input voltage, one end of the capacitor C28 is connected with the second input voltage through the resistor R13, and the other end of the photo coupler U7 is used for converting the voltage value of the photo coupler U7 into a level value of a digital word.
The device is arranged above, the input voltage value is conducted through the triode Q1 when abnormality is detected, so that the 2 nd pin and the 3 rd pin of the photoelectric coupler U7 are conducted to access the voltage value, the logic level value is output to the controller through the 6 th pin of the photoelectric coupler U7 to be identified, the input voltage value can be converted into a control signal of the logic level through the photoelectric coupler U7, the controller controls the alarm and the photoelectric prompter to carry out alarm prompt, the controller is conveniently accessed, meanwhile, the voltage input to the photoelectric coupler by the capacitor C28 is filtered, and the working stability of the photoelectric coupler is ensured.
Further, the photo coupler U7 includes a light emitting diode D1, a triode Q2, and an and gate, the 2 nd pin and the 3 rd pin of the photo coupler U7 are connected to the positive pole and the negative pole of the light emitting diode D1, the 7 th pin of the photo coupler U7 is connected to the enabling end of the and gate, and the 6 th pin and the 5 th pin of the photo coupler U7 are connected to the collector and the emitter of the triode Q2.
According to the arrangement, when the diode D1 is conducted by the input voltage, light is emitted, so that after the generated voltage value and the input voltage value of the enabling end are subjected to AND gate operation, a digital signal is output to the triode Q2 for conduction, and therefore the 6 th pin of the photoelectric coupler U7 outputs a low-level signal, and further output of a digital logic signal is achieved.
Further, the circuit further comprises a resistor R10 and a resistor R15, wherein the resistor R10 is arranged between the collector of the triode Q1 and the first voltage, and the resistor R15 is arranged between the collector of the triode Q1 and the 3 rd pin of the photoelectric coupler U7.
In the above arrangement, the resistor R10 is provided between the transistor Q1 and the first voltage to divide the input voltage, thereby preventing the voltage input to the collector of the transistor Q1 from becoming excessive, and the resistor R15 is provided between the transistor Q1 and the cathode of the diode D1 to divide the voltage, thereby protecting the diode D1.
Further, the base electrode of the triode Q1 is also connected with one end of a resistor R5, and the other end of the resistor R5 is connected with the emitter electrode of the triode Q1 and grounded.
By arranging the resistor R5 between the base electrode and the emitter electrode of the triode Q1, the voltage entering the base electrode of the triode Q1 is limited, and the triode Q1 is prevented from being damaged due to overlarge input voltage.
Further, the triode Q1 and the triode Q2 are NPN triodes.
Further, the voltage value of the first input voltage is larger than the voltage value of the second input voltage.
The above arrangement can convert the high voltage input into the alarm driving circuit into a digital level signal for small voltage driving.
Drawings
Fig. 1 is a schematic diagram of a circuit connection according to the present utility model.
Fig. 2 is a block diagram of an external circuit according to the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the drawings and the detailed description.
As shown in figures 1 and 2, the alarm driving circuit for arc extinction comprises a photoelectric coupler U7, a resistor R14, a resistor R21, a resistor R13, a triode Q1, a resistor R10, a resistor R15, a resistor R5 and a capacitor C28, wherein a signal input end 1 is connected with one end of the resistor R14, a credit input end 1 is used for externally detecting a voltage value after abnormality and comparing, the other end of the resistor R14 is connected with a base electrode of the triode Q1, a collector electrode of the triode Q1 is respectively connected with a first input voltage 3 and a 3 rd pin of the photoelectric coupler U7, the first input voltage 3 is connected with a 2 nd pin of the photoelectric coupler U7, a 5 th pin of the photoelectric coupler U7 is grounded, a 6 th pin of the photoelectric coupler U7 is connected with a signal output end 2, the signal output end 2 is used for outputting a control signal to a controller, the 6 th pin of the photoelectric coupler U7 is further connected with one end of a resistor R21, the other end of the resistor R21 is connected with a second input voltage 4, the 1 st pin of the photoelectric coupler U7 is connected with the second input voltage 4, the 7 th pin of the photoelectric coupler U7 is connected with the second input voltage 4 through a resistor R13, one end of a capacitor C28 is connected with the second input voltage 4, the other end of the capacitor C28 is grounded, the photoelectric coupler U7 is used for converting an input voltage value into a digital level value, a resistor R10 is arranged between a collector of a triode Q1 and the first voltage, a resistor R15 is arranged between a collector of the triode Q1 and a 3 rd pin of the photoelectric coupler U7, a base of the triode Q1 is further connected with one end of the resistor R5, and the other end of the resistor R5 is connected with an emitter of the triode Q1 and grounded. In this embodiment, the first input voltage 3 is VCC1, VCC1 is 12V, the second input voltage 4 is VCC2, VCC2 is 3.3V, and the transistors Q1 and Q2 are NPN transistors.
The photoelectric coupler U7 comprises a light emitting diode D1, a triode Q2 and an AND gate, the pin 2 and the pin 3 of the photoelectric coupler U7 are respectively connected with the anode and the cathode of the light emitting diode D1, the pin 7 of the photoelectric coupler U7 is connected with the enabling end of the AND gate, and the pin 6 and the pin 5 of the photoelectric coupler U7 are connected with the collector and the emitter of the triode Q2. In this embodiment, the model of the photo coupler U7 may be 6N137.
When the input voltage makes the diode D1 conduct, the diode D1 emits light, so that the generated voltage value and the input voltage value of the enabling end perform AND gate operation and then output a digital signal to the triode Q2 for conduction, so that the 6 th pin of the photoelectric coupler U7 outputs a low-level signal, and further, the output of a digital logic signal is realized.
In this embodiment, the detection and comparison circuit is a circuit for detecting whether the input power supply has abnormal voltage or current, for example, a voltage transformer or a current transformer, and the controller controls the buzzer and the sound diode to be turned on or off according to the control signal output by the alarm driving circuit for arc extinction so as to realize an alarm function. The above detection comparison circuit and controller are prior art and will not be described in detail herein.
The working principle of the utility model is as follows: the input voltage value is conducted through the triode Q1 when abnormality is detected, so that the 2 nd pin and the 3 rd pin of the photoelectric coupler U7 are conducted to access the voltage value, the logic level value is output to the controller through the 6 th pin of the photoelectric coupler U7 to be identified, the input voltage value can be converted into a control signal of the logic level through one photoelectric coupler U7, the controller controls the alarm and the photoelectric indicator to carry out alarm prompt, the controller is conveniently accessed, meanwhile, the voltage input to the photoelectric coupler by the capacitor C28 is filtered, and the working stability of the photoelectric coupler is ensured.
Claims (6)
1. An arc extinguishing alarm driving circuit is characterized in that: the photoelectric coupler comprises a photoelectric coupler U7, a resistor R14, a resistor R21, a resistor R13, a triode Q1 and a capacitor C28, wherein a signal input end is connected with one end of the resistor R14, the other end of the resistor R14 is connected with a base electrode of the triode Q1, a collector electrode of the triode Q1 is respectively connected with a first input voltage and a 3 rd pin of the photoelectric coupler U7, the first input voltage is connected with a 2 nd pin of the photoelectric coupler U7 on the other hand, a 5 th pin of the photoelectric coupler U7 is grounded, a 6 th pin of the photoelectric coupler U7 is used for outputting a control signal, a 6 th pin of the photoelectric coupler U7 is also connected with one end of the resistor R21, the other end of the resistor R21 is connected with a second input voltage, a 7 th pin of the photoelectric coupler U7 is connected with the second input voltage through the resistor R13, one end of the capacitor C28 is connected with the second input voltage, and the other end of the capacitor C28 is grounded, and the photoelectric coupler U7 is used for converting an input voltage value into a digital level value.
2. The arc suppressing alarm driving circuit according to claim 1, wherein: the photoelectric coupler U7 comprises a light emitting diode D1, a triode Q2 and an AND gate, the pin 2 and the pin 3 of the photoelectric coupler U7 are respectively connected with the anode and the cathode of the light emitting diode D1, the pin 7 of the photoelectric coupler U7 is connected with the enabling end of the AND gate, and the pin 6 and the pin 5 of the photoelectric coupler U7 are connected with the collector and the emitter of the triode Q2.
3. The arc suppressing alarm driving circuit according to claim 1, wherein: the resistor R10 is arranged between the collector of the triode Q1 and the first voltage, and the resistor R15 is arranged between the collector of the triode Q1 and the 3 rd pin of the photoelectric coupler U7.
4. The arc suppressing alarm driving circuit according to claim 1, wherein: the base electrode of the triode Q1 is also connected with one end of a resistor R5, and the other end of the resistor R5 is connected with the emitting electrode of the triode Q1 and grounded.
5. The arc suppressing alarm driving circuit according to claim 1, wherein: the audion Q1 and the audion Q2 are NPN audions.
6. The arc suppressing alarm driving circuit according to claim 1, wherein: the voltage value of the first input voltage is larger than that of the second input voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321596434.3U CN220085462U (en) | 2023-06-21 | 2023-06-21 | Alarm driving circuit for arc extinction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321596434.3U CN220085462U (en) | 2023-06-21 | 2023-06-21 | Alarm driving circuit for arc extinction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220085462U true CN220085462U (en) | 2023-11-24 |
Family
ID=88829102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321596434.3U Active CN220085462U (en) | 2023-06-21 | 2023-06-21 | Alarm driving circuit for arc extinction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220085462U (en) |
-
2023
- 2023-06-21 CN CN202321596434.3U patent/CN220085462U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107907777B (en) | Short circuit detection circuit and method and control circuit | |
| CN209150711U (en) | Undervoltage protection system, under-voltage protecting circuit and Switching Power Supply | |
| CN220085462U (en) | Alarm driving circuit for arc extinction | |
| CN212905381U (en) | Live wire zero line ground wire of alternating-current charging stake connects wrong detection circuitry | |
| CN110412341B (en) | IPM over-current detection circuit | |
| CN116599344A (en) | Voltage-stabilizing power supply circuit of electric control system | |
| CN111736088B (en) | Power state indicating circuit | |
| CN207426661U (en) | A kind of overcurrent protective device | |
| CN102347601B (en) | Power protection circuit | |
| CN103446697A (en) | Linkage fault detection device for point type fire detector | |
| CN204719122U (en) | A kind of voltage detecting warning circuit | |
| CN109935950B (en) | Antenna power supply circuit and antenna | |
| CN213693140U (en) | Novel high-voltage protection circuit | |
| CN213986775U (en) | Line fault sampling circuit applying broadcasting system | |
| CN215067216U (en) | Cable detection tool plate circuit | |
| CN111025177A (en) | Power input monitoring device | |
| CN217789299U (en) | Constant current source emergency stop device for energy storage converter | |
| CN216121778U (en) | Low-cost overcurrent protection circuit of sensor | |
| CN215733443U (en) | Overvoltage and overcurrent protection circuit | |
| CN218630142U (en) | Detection circuit for brake blocking circuit abnormity | |
| CN220730371U (en) | Alarm circuit for detecting abnormal closing of normally closed end of relay | |
| CN108306630B (en) | Switch and reset circuit of power supply | |
| CN109326092B (en) | Simple signal alarm circuit | |
| CN215986989U (en) | PLC transistor output circuit with fault detection function | |
| CN214900186U (en) | Overvoltage voltage stabilizing circuit with abnormal output alarm function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |