CN220544698U - Anti-sparking circuit - Google Patents
Anti-sparking circuit Download PDFInfo
- Publication number
- CN220544698U CN220544698U CN202322204629.5U CN202322204629U CN220544698U CN 220544698 U CN220544698 U CN 220544698U CN 202322204629 U CN202322204629 U CN 202322204629U CN 220544698 U CN220544698 U CN 220544698U
- Authority
- CN
- China
- Prior art keywords
- module
- resistor
- circuit
- resistance
- power supply
- 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
- 239000003990 capacitor Substances 0.000 claims abstract description 22
- 230000005669 field effect Effects 0.000 claims description 38
- 238000010892 electric spark Methods 0.000 abstract description 11
- 230000000670 limiting effect Effects 0.000 description 4
- 230000003071 parasitic effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses an anti-sparking circuit, which comprises a power supply module, an analog switch circuit and an overcurrent protection module, wherein the power supply module is connected with the analog switch circuit; the analog switch circuit comprises a resistance loop module, a first switch module, a second switch module and an overcurrent protection module; the positive end of the power supply module is connected with one end of the resistance loop module, the negative electrode of the power supply module is grounded, the other end of the resistance loop module is connected with one end of the switch module I, the other end of the switch module I is grounded, the other end of the resistance loop module is also connected with one end of the switch module II, and the other end of the switch module II is connected with the positive electrode of the power supply module; the other end of the resistance loop module is also connected with the overcurrent protection module. The anti-sparking circuit formed by the power supply module, the analog switch circuit and the overcurrent protection module avoids electric sparks generated by overlarge current flowing through a capacitor in the circuit when the DC socket is connected with a corresponding adapter plug, thereby reducing circuit faults and improving safety.
Description
Technical Field
The utility model relates to the technical field of circuits, in particular to an anti-sparking circuit.
Background
In the prior art, a common socket is directly connected with a power supply, and no current limiting protection measures exist, so that large current pulses can be generated at the moment of plug insertion and plug extraction, and electric sparks can be easily generated when a capacitor in a circuit flows through the large current. And, if the common socket does not consider characteristics of different load devices, such as charging and discharging processes of the large capacity capacitor, there is a risk of overcurrent and overvoltage. The safety specification and test of the common socket are difficult to avoid various hidden circuit fault risks, the service life and the fault rate of the common socket are difficult to predict, certain potential safety hazards exist, and the long-term reliability and the safety are low.
Disclosure of Invention
To the defect of above-mentioned prior art, this application provides a prevent circuit of striking sparks, this circuit passes through DC power module and analog switch circuit and overcurrent protection module's prevent the circuit of striking sparks, avoided DC socket and corresponding adapter plug switch-on to be in the twinkling of an eye, the electric current that flows through electric capacity in the circuit is too big and produce the electric spark, not only reduced circuit trouble, still improved the security to safe and reliable normal operating has improved security performance and life in the socket use greatly, reduction in production cost.
To achieve the above object, the present application provides an anti-ignition circuit, including: the device comprises a power supply module, an analog switch circuit and an overcurrent protection module.
The analog switch circuit comprises a resistor loop module, a first switch module and a second switch module.
In the application, the positive electrode end of the power supply module is connected with one end of the resistance loop module, the negative electrode end of the power supply module is grounded, the other end of the resistance loop module is connected with one end of the first switch module, the other end of the first switch module is grounded, the other end of the resistance loop module is also connected with one end of the second switch module, and the other end of the second switch module is connected with the positive electrode end of the power supply module; the other end of the resistance loop module is also connected with the overcurrent protection module.
Further, the power supply module at least comprises a DC power supply module, and the DC power supply module at least comprises a positive terminal pin 1, a negative terminal pin 2 and a negative terminal pin 3; wherein the negative terminal pin 2 and the negative terminal pin 3 are respectively grounded.
In this application, the resistor loop module includes at least N resistor modules with preset resistances connected in parallel, where N is an integer greater than 1.
The positive terminal pin 1 is connected with one end of the resistor module, and the other end of the resistor module is connected with the VCC power supply terminal.
In this application, the first switch module at least includes: resistor R4, resistor R5, resistor R6, transistor Q1, and capacitor C1.
Further, the other end of resistance module is connected with one end of resistance R4, and the other end of resistance R4 is connected with one end of electric capacity C1, and electric capacity C1's the other end ground connection, resistance R4's the other end still is connected with one end of resistance R5, and resistance R5's the other end ground connection, resistance R4's the other end still is connected with triode Q1's base, triode Q1's projecting pole ground connection, triode Q1's collecting electrode is connected with resistance R6's one end.
In this application, the second switch module at least includes: a field effect transistor Q2, a capacitor C2 and a resistor R7.
Further, the other end of the resistor module is further connected with a source electrode of the field effect tube Q2, a grid electrode of the field effect tube Q2 is connected with one end of the capacitor C2, the grid electrode of the field effect tube Q2 is further connected with one end of the resistor R7, the other end of the capacitor C2 is connected with the positive electrode end pin 1, the other end of the resistor R7 is connected with the positive electrode end pin 1, the grid electrode of the field effect tube Q2 is further connected with the other end of the resistor R6, and a drain electrode of the field effect tube Q2 is connected with one end of the resistor module.
In this application, the overcurrent protection module includes at least a fuse assembly F.
Further, one end of the fuse assembly F is connected to the other end of the resistor module, the source of the fet Q2, and one end of the resistor R4, respectively.
The resistor loop module is arranged in the circuit, so that the high current at the moment of plugging can be limited, and electric spark is avoided; the triode and the field effect transistor are used as a switch, so that the circuit can be cut off and turned on more reliably; the overcurrent protection module is arranged, so that the overcurrent damage of the circuit can be prevented; a plurality of resistors are connected in parallel, so that current sharing and current division can be realized, and the load capacity is improved; the electronic element parameters are reasonably selected, so that the circuit is more stable and reliable, the circuit structure is clear and reasonable, and the realization and the debugging are easy. Overall, the circuit design is more scientific and reasonable, compares ordinary socket circuit, can improve security, reliability and suitability better.
Compared with the prior art, the application has the beneficial effects that:
according to the anti-sparking circuit provided by the utility model, through the anti-sparking circuit formed by the DC power supply module, the analog switch circuit and the overcurrent protection module, the situation that the electric spark is generated due to overlarge current flowing through a capacitor in the circuit when a DC socket is connected with a corresponding adapter plug is avoided, the current between the resistance loop module and the switch module is conducted and flows at the moment that the plug and the socket are electrified in the analog switch circuit, then the current conducted and flowing between the resistance loop module and the switch module II is reduced, and finally the capacitor connected with the anode end of the DC power supply module is charged instantly without generating the electric spark; the overcurrent protection module also plays a role in overcurrent protection. The whole anti-sparking circuit not only reduces circuit faults, but also improves the safety, effectively protects the safety of the socket and the circuit thereof, and prolongs the service life of the socket and the circuit thereof.
Drawings
Fig. 1 is a schematic structural diagram of an anti-ignition circuit according to the present utility model.
Fig. 2 is a schematic circuit diagram of an anti-sparking circuit according to a first embodiment of the present utility model.
Detailed Description
For the purposes, technical solutions and advantages of the embodiments of the present application to be more apparent, the technical solutions will be clearly and completely described below in connection with the embodiments of the present application. It will be apparent that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Embodiment one:
as shown in fig. 1, the present utility model provides an anti-ignition circuit, which mainly comprises: the device comprises a power supply module, an analog switch circuit and an overcurrent protection module.
The analog switch circuit comprises a resistor loop module, a first switch module and a second switch module.
In the application, the positive electrode end of the power supply module is connected with one end of the resistance loop module, the negative electrode end of the power supply module is grounded, the other end of the resistance loop module is connected with one end of the first switch module, the other end of the first switch module is grounded, the other end of the resistance loop module is also connected with one end of the second switch module, and the other end of the second switch module is connected with the positive electrode end of the power supply module; the other end of the resistance loop module is also connected with the overcurrent protection module.
Further, the power supply module at least comprises a DC power supply module, and the DC power supply module at least comprises a positive terminal pin 1, a negative terminal pin 2 and a negative terminal pin 3; wherein the negative terminal pin 2 and the negative terminal pin 3 are respectively grounded.
In this application, the resistor loop module includes at least N resistor modules with preset resistances connected in parallel, where N is an integer greater than 1.
As shown in fig. 2, preferably, taking N as 3, the resistance module may be 3 resistors with resistances of 20-100 ohms connected in parallel, which is not limited thereto.
The positive terminal pin 1 is connected with one end of the resistor module, and the other end of the resistor module is connected with the VCC power supply terminal.
In this application, the first switch module at least includes: resistor R4, resistor R5, resistor R6, transistor Q1, and capacitor C1.
Preferably, the resistor R4, the resistor R5 and the resistor R6 may be selected as resistors with the resistance range of 10k to 100k, the model of the triode Q1 may be selected as 3904, and the specification parameter of the capacitor C1 may be set to 0.1uF/50V, which is not limited thereto.
Further, the other end of resistance module is connected with one end of resistance R4, and the other end of resistance R4 is connected with one end of electric capacity C1, and electric capacity C1's the other end ground connection, resistance R4's the other end still is connected with one end of resistance R5, and resistance R5's the other end ground connection, resistance R4's the other end still is connected with triode Q1's base, triode Q1's projecting pole ground connection, triode Q1's collecting electrode is connected with resistance R6's one end.
In this application, the second switch module at least includes: a field effect transistor Q2, a capacitor C2 and a resistor R7.
Preferably, the type of the field effect transistor Q2 can be selected as VBE2412, the power 1 and the resistance R7 of the capacitor C2 can be selected as 20-100 ohm resistances, and the method is not limited thereto
Further, the other end of the resistor module is further connected with a source electrode of the field effect tube Q2, a grid electrode of the field effect tube Q2 is connected with one end of the capacitor C2, the grid electrode of the field effect tube Q2 is further connected with one end of the resistor R7, the other end of the capacitor C2 is connected with the positive electrode end pin 1, the other end of the resistor R7 is connected with the positive electrode end pin 1, the grid electrode of the field effect tube Q2 is further connected with the other end of the resistor R6, and a drain electrode of the field effect tube Q2 is connected with one end of the resistor module.
In this application, the overcurrent protection module includes at least a fuse assembly F.
Preferably, the fuse assembly may employ an SND1812 patch self-healing fuse, neither of which is limited thereto.
Further, one end of the fuse assembly F is connected to the other end of the resistor module, the source of the fet Q2, and one end of the resistor R4, respectively.
The circuit implementation principle of the anti-sparking circuit is as follows:
when the adapter is not inserted into the DC socket, the G grid of the field effect transistor Q2 in the circuit is at a high level, the field effect transistor Q2 is not conducted,
when the adapter is plugged into the DC socket, electricity is conducted through the resistor, the base electrode of the transistor Q1 is high level, the transistor Q1 is conducted to GND, the G grid electrode of the field effect transistor Q2 is pulled down, and the P-MOS is conducted
After the parallel resistor packaged by 3 x 33r is conducted, the capacitor on the following circuit can be charged instantly, meanwhile, the field effect tube Q2 is conducted to take over large current, and the internal resistance of the field effect tube Q2 is smaller than the resistance of the resistor after being conducted, so that the current is conducted from the field effect tube Q2, and electric spark is prevented from being generated. When the transistor Q1 is turned off, the collector voltage of the transistor Q1 increases, and approaches the power supply voltage Vcc. The collector of transistor Q1 is connected to the gate of field effect transistor Q2, so when transistor Q1 turns off, the gate voltage of field effect transistor Q2 also rises until near Vcc. A parasitic diode is formed between the gate and the source of the field effect transistor Q2, and is turned on when the gate voltage is higher than the source. At this time, the parasitic diode between the gate and the source of the field effect transistor Q2 is turned on, so that the gate voltage cannot be raised continuously, and the turn-on voltage of the parasitic diode is maintained at about 0.6-0.7V. The gate-source voltage of the fet Q2 is about 0.7V, which is less than the threshold voltage, which is typically 1-3V, so that the fet Q2 is turned on at this time. That is, after the transistor is turned off, the gate of the field effect transistor Q2 is pulled high, but the gate-source voltage thereof is kept in the on state due to the parasitic diode effect, so that the PMOS transistor is turned on.
And (3) setting a resistor loop module: 3 resistors 33 ohm parallel connected are arranged at the input end of the circuit, so that transient high current can be limited, the buffer current limiting effect is achieved, and electric spark is prevented from being generated during plugging; the triode is used for switching and controlling the field effect transistor: by utilizing the conduction characteristic of the triode, when the plug is inserted, the triode is conducted to turn off the field effect transistor; when the plug is pulled out, the triode is cut off to conduct the field effect transistor, so that the effect of smooth switching is achieved; field effect transistor load replaces resistance: after the field effect tube is conducted, the internal resistance of the field effect tube is far smaller than that of the current limiting resistor, so that the power can be rapidly supplied to a later-stage circuit, and excessive voltage drop is prevented from being generated in the plugging process; and (3) setting overcurrent protection: the fuse or other overcurrent protection modules are added, so that the circuit can be cut off under abnormal conditions, and damage is prevented.
In a word, a resistor loop module is arranged in the circuit, so that high current at the moment of plugging can be limited, and electric spark is avoided; the triode and the field effect transistor are used as a switch, so that the circuit can be cut off and turned on more reliably; the overcurrent protection module is arranged, so that the overcurrent damage of the circuit can be prevented; a plurality of resistors are connected in parallel, so that current sharing and current division can be realized, and the load capacity is improved; the electronic element parameters are reasonably selected, so that the circuit is more stable and reliable, the circuit structure is clear and reasonable, and the realization and the debugging are easy. Overall, the circuit design is more scientific and reasonable, compares ordinary socket circuit, can improve security, reliability and suitability better.
The anti-sparking circuit is formed by the DC power supply module, the analog switch circuit and the overcurrent protection module, so that electric sparks generated by overlarge current flowing through a capacitor in the circuit at the moment of switching on the DC socket and the corresponding adapter plug are avoided, the current between the resistor loop module and the switch module at the moment of switching on the plug and the socket in the analog switch circuit is conducted and flows, then the conducted and flowing current between the resistor loop module and the switch module II is reduced, and finally the capacitor connected with the anode end of the DC power supply module is charged instantly without generating electric sparks; the overcurrent protection module also plays a role in overcurrent protection. The whole anti-sparking circuit not only reduces circuit faults, but also improves the safety, effectively protects the safety of the socket and the circuit thereof, and prolongs the service life of the socket and the circuit thereof.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solution of the present utility model, and not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that the technical solutions described in the foregoing embodiments may be modified or some of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (9)
1. An anti-sparking circuit, comprising:
the power supply module, the analog switch circuit and the overcurrent protection module;
the analog switch circuit comprises a resistor loop module, a first switch module and a second switch module;
the positive end of the power supply module is connected with one end of the resistance loop module, the negative end of the power supply module is grounded, the other end of the resistance loop module is connected with one end of the first switch module, the other end of the first switch module is grounded, the other end of the resistance loop module is also connected with one end of the second switch module, and the other end of the second switch module is connected with the positive end of the power supply module;
the other end of the resistance loop module is also connected with the overcurrent protection module.
2. An anti-ignition circuit according to claim 1, wherein the power supply module comprises at least a DC power supply module comprising at least a positive terminal pin 1, a negative terminal pin 2 and a negative terminal pin 3;
wherein the negative terminal pin 2 and the negative terminal pin 3 are respectively grounded.
3. An anti-sparking circuit as claimed in claim 2, wherein said resistive circuit module comprises at least N parallel connected resistive modules of a predetermined resistance value, wherein N is an integer greater than 1;
the positive terminal pin 1 is connected with one end of a resistor module, and the other end of the resistor module is connected with the VCC power supply end.
4. A fire protection circuit according to claim 3, wherein said switch module one comprises at least: resistor R4, resistor R5, resistor R6, transistor Q1, and capacitor C1.
5. An anti-sparking circuit as claimed in claim 4, wherein,
the other end of resistance module is connected with resistance R4's one end, and resistance R4's the other end is connected with electric capacity C1's one end, electric capacity C1's the other end ground connection, resistance R4's the other end still is connected with resistance R5's one end, resistance R5's the other end ground connection, resistance R4's the other end still is connected with triode Q1's base, triode Q1's projecting pole ground connection, triode Q1's collecting electrode is connected with resistance R6's one end.
6. An anti-sparking circuit as claimed in claim 5, wherein said second switch module comprises at least: a field effect transistor Q2, a capacitor C2 and a resistor R7.
7. An anti-sparking circuit as claimed in claim 6, wherein,
the other end of the resistor module is further connected with the source electrode of the field effect tube Q2, the grid electrode of the field effect tube Q2 is connected with one end of the capacitor C2, the grid electrode of the field effect tube Q2 is further connected with one end of the resistor R7, the other end of the capacitor C2 is connected with the positive electrode end pin 1, the other end of the resistor R7 is connected with the positive electrode end pin 1, the grid electrode of the field effect tube Q2 is further connected with the other end of the resistor R6, and the drain electrode of the field effect tube Q2 is connected with one end of the resistor module.
8. An anti-sparking circuit as claimed in claim 7, wherein said over-current protection module comprises at least a fuse assembly F.
9. An anti-sparking circuit as claimed in claim 8, wherein one end of said fuse assembly F is connected to the other end of said resistor module, the source of said fet Q2, and one end of said resistor R4, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322204629.5U CN220544698U (en) | 2023-08-16 | 2023-08-16 | Anti-sparking circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322204629.5U CN220544698U (en) | 2023-08-16 | 2023-08-16 | Anti-sparking circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220544698U true CN220544698U (en) | 2024-02-27 |
Family
ID=89969495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322204629.5U Active CN220544698U (en) | 2023-08-16 | 2023-08-16 | Anti-sparking circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220544698U (en) |
-
2023
- 2023-08-16 CN CN202322204629.5U patent/CN220544698U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102629751B (en) | Over-current protection circuit | |
| CN102170117A (en) | Battery protecting device and protecting method | |
| CN107196269A (en) | A kind of DC protection circuit and its guard method | |
| CN107230965A (en) | Port multi-level protection circuit | |
| CN105207652A (en) | Safety protection circuit of contactless electronic relay | |
| CN103633616B (en) | A kind of current foldback circuit | |
| CN112467971A (en) | Slow starting circuit | |
| CN204578083U (en) | To ask for power type lightning arrester supervisory control system | |
| CN212695971U (en) | Short-circuit protection module with current-limiting function | |
| CN220544698U (en) | Anti-sparking circuit | |
| CN111064172A (en) | Protection circuit and variable pitch system | |
| CN204858537U (en) | Battery discharge short -circuit protection circuit | |
| CN205160489U (en) | Contactless electronic relay's safety protection circuit | |
| CN217335073U (en) | Relay control circuit and passive protection device | |
| CN203826946U (en) | Cell explosionproof circuit and cell charging circuit | |
| CN207021659U (en) | A kind of DC protection circuit | |
| CN206673557U (en) | A kind of electric instrument intelligent protection circuit | |
| CN213661197U (en) | Short-circuit protection circuit based on Hall current sensor and voltage comparator | |
| CN210837547U (en) | Mechanical switch circuit structure | |
| CN206640305U (en) | A kind of uninterruption power source surge restraint circuit | |
| CN209282830U (en) | Surge current suppression circuit | |
| CN209217706U (en) | Surge current suppression circuit | |
| CN208753960U (en) | High voltage power distribution circuit and new-energy automobile | |
| CN221747960U (en) | MOSFET-based double overcurrent protection high-side control switch | |
| CN216449626U (en) | Protection circuit of test fixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |