CN217824253U - Prevent circuit of striking sparks - Google Patents
Prevent circuit of striking sparks Download PDFInfo
- Publication number
- CN217824253U CN217824253U CN202221779628.2U CN202221779628U CN217824253U CN 217824253 U CN217824253 U CN 217824253U CN 202221779628 U CN202221779628 U CN 202221779628U CN 217824253 U CN217824253 U CN 217824253U
- Authority
- CN
- China
- Prior art keywords
- circuit
- current
- anode
- load
- input
- 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
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a prevent circuit of striking sparks connects between switching power supply's alternating current input and load, and it includes switching circuit, current-limiting resistance circuit and delay control circuit, current-limiting resistance circuit and switching circuit all connect between alternating current input and load, delay control circuit is connected with current-limiting resistance circuit and switching circuit to control switching circuit's switching on according to the voltage that comes from the current-limiting resistance circuit, and thus do not switch on switching circuit in the twinkling of an eye at the power plug for the alternating current of input is supplied power for the load through current-limiting resistance circuit earlier, alleviates instantaneous current's impact. The utility model discloses prevent circuit of striking sparks is through not conducting switch circuit in the twinkling of an eye at the power plug for the alternating current of input is earlier through current-limiting resistance circuit for the load power supply, and because of the electric current through current-limiting resistance circuit is less, can not have the big impact current of transient state, can alleviate instantaneous current's impact, thereby eliminate the phenomenon of striking sparks, the life of extension socket etc. and can reduce the interference to peripheral electrical apparatus.
Description
Technical Field
The utility model relates to an electronic circuit technical field, more specifically relate to a prevent circuit of striking sparks.
Background
The existing switch power supply product, for example common charger, adapter etc., when using, when power plug inserts the operation on the socket, because of switching power supply in the electric capacity filtering process after the input rectification, the electrolytic capacitor of filtering charges and leads to the transient current very big, the transient current changes very fast when inserting power plug, lead to appearing instantaneous high voltage, puncture air discharge and form the phenomenon of striking sparks, can make the user feel unsafe like this, and the metal shrapnel of power plug sheetmetal and socket easily produces the trace of striking sparks, shorten the life of the metal shrapnel of power plug sheetmetal and socket, can also influence the life of filtering electrolytic capacitor simultaneously, and also can produce the interference to peripheral electrical apparatus.
Disclosure of Invention
The utility model aims to solve the technical problem that an instantaneous current impact when providing a circuit of preventing striking sparks in order to alleviate the power plug eliminates the phenomenon of striking sparks.
In order to solve the technical problem, the utility model provides a prevent circuit of striking sparks connects between switching power supply's alternating current input and load, and it includes switching circuit, current-limiting resistance circuit and delay control circuit, current-limiting resistance circuit and switching circuit all connect between alternating current input and load, delay control circuit and current-limiting resistance circuit and switching circuit are connected to come control switch circuit's switching on according to the voltage that comes from the current-limiting resistance circuit, thereby do not switch on switching circuit in the twinkling of an eye at the power plug, make the alternating current of input supply power for the load through the current-limiting resistance circuit earlier, alleviate instantaneous current's impact.
The further technical scheme is as follows: the switch circuit comprises a bidirectional thyristor, a control electrode of the bidirectional thyristor is connected with the delay control circuit, and a first anode and a second anode of the bidirectional thyristor are respectively connected with the alternating current input and the load.
The further technical scheme is as follows: and a second resistor is connected between the control electrode of the bidirectional controllable silicon and the first anode.
The further technical scheme is as follows: the time delay control circuit comprises a fourth resistor, a first diode, a first electrolytic capacitor and a photoelectric coupler, wherein the anode and the cathode of a light emitting diode in the photoelectric coupler are respectively connected with the anode and the cathode of the first electrolytic capacitor, the anode of the first electrolytic capacitor is also connected with the cathode of the first diode, the anode of the first diode is connected with a current-limiting resistor circuit through the fourth resistor, the second anode in the photosensitive bidirectional thyristor of the photoelectric coupler is connected with one end of a load through a third resistor and a current-limiting resistor circuit, and the first anode in the photosensitive bidirectional thyristor of the photoelectric coupler is connected with the switch circuit to output a control signal to control the on and off of the switch circuit.
The further technical scheme is as follows: the delay control circuit also comprises a voltage stabilizing diode, and the voltage stabilizing diode is connected between the anode and the cathode of the light emitting diode in the photoelectric coupler.
The further technical scheme is as follows: the current limiting resistor circuit includes a first resistor connected between an ac input and a load.
The utility model has the advantages of: compared with the prior art, the utility model discloses prevent circuit connection that strikes sparks between switching power supply's alternating current input and load, this prevent delay control circuit in the circuit that strikes sparks can come switching on of control switch circuit according to the voltage that comes from the current-limiting resistance circuit to do not switch on in the twinkling of an eye at the power plug switching circuit for the alternating current of input gives the load power supply through the current-limiting resistance circuit earlier, and because of the electric current through the current-limiting resistance circuit is less, there is not the big rush current of transient state, can alleviate instantaneous current's impact, thereby eliminate the phenomenon of striking sparks, prolong the life of devices such as socket, and can reduce the interference to peripheral electrical apparatus.
Drawings
Fig. 1 is a schematic circuit diagram of an embodiment of the anti-sparking circuit of the present invention.
Fig. 2 is a schematic diagram of a specific circuit structure of the ignition prevention circuit of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention will be further described with reference to the accompanying drawings and examples.
Referring to fig. 1 and 2, an embodiment of an anti-sparking circuit 100 according to the present invention is shown. The anti-sparking circuit 100 of the present embodiment is used for being connected between an ac input 200 and a load 300 to delay the instantaneous large current input at the moment of power plugging and unplugging, so as to eliminate the sparking phenomenon during the power plugging and unplugging.
In this embodiment, the anti-sparking circuit 100 includes a switch circuit 12, a current-limiting resistor circuit 11, and a delay control circuit 13, the current-limiting resistor circuit 11 and the switch circuit 12 are both connected between the ac input 200 and the load 300, and the delay control circuit 13 is connected to the current-limiting resistor circuit 11 and the switch circuit 12 to control the conduction of the switch circuit 12 according to the voltage from the current-limiting resistor circuit 11, so that the switch circuit 12 is not turned on at the moment of power plugging and unplugging, so that the input ac power is supplied to the load 300 through the current-limiting resistor circuit 11, and the impact of the instantaneous current is alleviated. Preferably, the current limiting resistor circuit 11 includes a first resistor R1 connected between the ac input 200 and the load 300, and understandably, the first resistor R1 is a high power resistor. Based on the design, at the moment of plugging and unplugging the power supply, the switch circuit 12 can be switched off, so that the input alternating current firstly supplies power to the load 300 through the current-limiting resistor circuit 11, and because the resistance value of the first resistor R1 is larger and the current passing through the current-limiting resistor circuit 11 is smaller, transient large impact current cannot exist, the impact of the instantaneous current can be relieved, and the ignition phenomenon can be eliminated.
In some embodiments, the switching circuit 12 includes a triac Q1, a control electrode of the triac Q1 is connected to the delay control circuit 13, a first anode and a second anode of the triac Q1 are respectively connected to the ac input 200 and the load 300, and a second resistor R2 is further connected between the control electrode and the first anode of the triac Q1.
In some embodiments, the delay control circuit 13 includes a fourth resistor R4, a first diode D1, a first electrolytic capacitor EC1, and a photo coupler U1, wherein an anode (pin 1) and a cathode (pin 2) of a light emitting diode in the photo coupler U1 are respectively connected to an anode and a cathode of the first electrolytic capacitor EC1, the anode of the first electrolytic capacitor EC1 is further connected to a cathode of the first diode D1, the anode of the first diode D1 is connected to the current limiting resistor circuit 11 through the fourth resistor R4, a second anode (pin 6) in the photo-sensitive bidirectional thyristor Q1 of the photo coupler U1 is connected to the switch circuit 12 and one end of the current limiting resistor circuit 11 through a third resistor R3, and the first anode (pin 4) in the photo-sensitive bidirectional thyristor Q1 of the photo coupler U1 is connected to a control electrode of the bidirectional thyristor Q1 in the switch circuit 12 to output a control signal to control on and off of the bidirectional thyristor Q1. Preferably, in this embodiment, the photocoupler U1 is a triac output photocoupler of MOC30 series (e.g., MOC 3020).
Specifically, the utility model discloses prevent among the circuit 100 of striking sparks first resistance R1 and bidirectional thyristor Q1 parallel connection between the one end of alternating current input 200 positive poles and load 300, the other end of alternating current input 200 negative poles and load 300 is still connected to emitting diode's negative pole (pin 2) among this photoelectric coupler U1, understandably, the utility model discloses when preventing circuit 100 of striking sparks and being applied to concrete switching power supply circuit, at the positive pole of alternating current input 200 and still can connect a protective tube between the circuit 100 of preventing striking sparks, just alternating current input 200 still can handle the back through piezo-resistor, EMI filter circuit and rectifier filter circuit etc. after preventing circuit 100 of striking sparks and pass through filtering electrolytic capacitor energy storage, supply power again and export to load 300.
Further, the delay control circuit 13 further includes a zener diode ZD1, and the zener diode ZD1 is connected between the anode and the cathode of the light emitting diode in the photocoupler U1. Preferably, in this embodiment, the anode (pin 1) of the light emitting diode in the photocoupler U1 is connected to the zener diode ZD1 and the first electrolytic capacitor EC1 through a fifth resistor R5.
Understandably, when the alternating current is switched on, because the bidirectional thyristor Q1 is not conducted, the power is supplied to a rear circuit only through the first resistor R1 with larger resistance, one path of the power can be charged to the filter electrolytic capacitor through the EMI filter circuit, the rectifier filter circuit and the like after passing through the first resistor R1, the other path of the power can be charged to the first electrolytic capacitor EC1 after passing through the first resistor R1 through the fourth resistor R4 and the first diode D1, when the voltage of the first electrolytic capacitor EC1 is charged to enable the photoelectric coupler U1 to normally drive the bidirectional thyristor Q1 to work and conduct, the voltage on the filter electrolytic capacitor of the energy storage is slightly charged, the voltage is not suddenly changed, namely, the transient large impact current can not exist, the socket can not be ignited during broadcasting, the impact current can not exist, and the service lives of the protective tube and the filter electrolytic capacitor can be prolonged.
To sum up, the utility model discloses prevent circuit connection that strikes sparks between switching power supply's alternating current input and load, this prevent delay control circuit in the circuit that strikes sparks can come switching control circuit's switching on according to the voltage that comes from the current-limiting resistance circuit to do not switch on in the twinkling of an eye at the power plug switching circuit for the alternating current of input supplies power for the load through the current-limiting resistance circuit earlier, and because of the electric current through the current-limiting resistance circuit is less, there is not the big rush current of transient state, can alleviate instantaneous current's impact, thereby eliminate the phenomenon of striking sparks, prolong the life of devices such as socket, and can reduce the interference to peripheral electrical apparatus.
The foregoing is considered as illustrative of the preferred embodiments of the invention and is not intended to limit the invention in any way. Various equivalent changes and modifications can be made on the basis of the above embodiments by those skilled in the art, and all equivalent changes and modifications within the scope of the claims should fall within the protection scope of the present invention.
Claims (6)
1. An anti-sparking circuit, connected between an AC input of a switching power supply and a load, characterized in that: the current-limiting resistor circuit and the switch circuit are connected between an alternating current input and a load, the delay control circuit is connected with the current-limiting resistor circuit and the switch circuit to control the switch-on of the switch circuit according to the voltage from the current-limiting resistor circuit, so that the switch circuit is not switched on at the moment of plugging and unplugging of a power supply, the input alternating current firstly supplies power to the load through the current-limiting resistor circuit, and the impact of instantaneous current is relieved.
2. The anti-sparking circuit of claim 1, wherein: the switch circuit comprises a bidirectional thyristor, a control electrode of the bidirectional thyristor is connected with the delay control circuit, and a first anode and a second anode of the bidirectional thyristor are respectively connected with the alternating current input and the load.
3. The anti-sparking circuit of claim 2, wherein: and a second resistor is connected between the control electrode of the bidirectional controllable silicon and the first anode.
4. The anti-sparking circuit of claim 1, wherein: the time delay control circuit comprises a fourth resistor, a first diode, a first electrolytic capacitor and a photoelectric coupler, wherein the anode and the cathode of a light emitting diode in the photoelectric coupler are respectively connected with the anode and the cathode of the first electrolytic capacitor, the anode of the first electrolytic capacitor is also connected with the cathode of the first diode, the anode of the first diode is connected with a current-limiting resistor circuit through the fourth resistor, the second anode in the photosensitive bidirectional thyristor of the photoelectric coupler is connected with one end of a load through a third resistor and a current-limiting resistor circuit, and the first anode in the photosensitive bidirectional thyristor of the photoelectric coupler is connected with the switch circuit to output a control signal to control the on and off of the switch circuit.
5. The anti-sparking circuit of claim 4, wherein: the delay control circuit also comprises a voltage stabilizing diode, and the voltage stabilizing diode is connected between the anode and the cathode of the light emitting diode in the photoelectric coupler.
6. The anti-sparking circuit of claim 1, wherein: the current limiting resistor circuit includes a first resistor connected between an ac input and a load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221779628.2U CN217824253U (en) | 2022-07-11 | 2022-07-11 | Prevent circuit of striking sparks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221779628.2U CN217824253U (en) | 2022-07-11 | 2022-07-11 | Prevent circuit of striking sparks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217824253U true CN217824253U (en) | 2022-11-15 |
Family
ID=83963748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221779628.2U Active CN217824253U (en) | 2022-07-11 | 2022-07-11 | Prevent circuit of striking sparks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217824253U (en) |
-
2022
- 2022-07-11 CN CN202221779628.2U patent/CN217824253U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217824253U (en) | Prevent circuit of striking sparks | |
| CN209881386U (en) | Protection circuit for electrification of shell | |
| CN209516926U (en) | A kind of soft startup of electric power protection circuit | |
| CN206922644U (en) | A kind of anti-firing circuit of Switching Power Supply and Switching Power Supply | |
| CN216390805U (en) | Secondary power supply constant voltage and constant current switching circuit | |
| CN210577783U (en) | Surge current suppression circuit and switching power supply | |
| CN210724716U (en) | Reset overload protection circuit of high-voltage pulse generator | |
| CN212785162U (en) | Switch power supply | |
| CN110460232A (en) | A kind of DC power supply with isolation module | |
| CN212435409U (en) | Heavy current charging circuit and charger and electronic equipment thereof | |
| CN220797858U (en) | Battery charging connection control circuit and charger | |
| CN205017204U (en) | Zero power consumption release circuit for anti -interference capacitors on switching power supply AC end | |
| CN205336584U (en) | LED power with protection circuit | |
| CN218071330U (en) | Power supply driving circuit safe to use | |
| CN218829197U (en) | Mobile power supply charger circuit and mobile power supply charger | |
| CN214544107U (en) | Self-adaptive discharge circuit of energy storage capacitor after power failure of switching power supply | |
| CN220671531U (en) | High-precision zero-crossing detection circuit | |
| CN219227867U (en) | High-efficiency LED driving circuit and lamp tube | |
| CN214675105U (en) | Power-on trigger reset circuit of standby power supply | |
| CN211923841U (en) | Electric lock control circuit | |
| CN210053241U (en) | Output short-circuit sparkless generation and battery zero-voltage charging circuit | |
| CN211405855U (en) | AC input voltage suppression circuit of adapter | |
| CN216086173U (en) | Robot and robot system | |
| CN218771294U (en) | ARM intelligent input surge suppressor | |
| CN211656000U (en) | Power supply circuit for inhibiting instant starting-up impact current |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |