CN210074769U - Circuit for preventing DC direct current plug from contacting to generate electric spark - Google Patents
Circuit for preventing DC direct current plug from contacting to generate electric spark Download PDFInfo
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- CN210074769U CN210074769U CN201921277325.9U CN201921277325U CN210074769U CN 210074769 U CN210074769 U CN 210074769U CN 201921277325 U CN201921277325 U CN 201921277325U CN 210074769 U CN210074769 U CN 210074769U
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Abstract
The utility model discloses a prevent DC direct current plug contact circuit that produces electric spark, including resistance R1, R2, electric capacity C1, zener diode D1, and N type field effect transistor Q1, direct current plug positive input end and direct current plug positive output are connected to resistance R1 one end, resistance R1 other end connecting resistance R2 one end, direct current plug negative pole input is connected to the resistance R2 other end, resistance R2 still with electric capacity C1, zener diode D1 is parallelly connected, the grid of N type field effect transistor Q1 is connected at resistance R1, the junction of R2, direct current plug negative pole input is connected to N type field effect transistor Q1's source electrode, direct current plug negative pole output is connected to N type field effect transistor Q1's drain electrode. The utility model discloses a several simple electronic components design prevents that DC direct current plug from contacting the circuit that produces the electric spark, and the cost is lower, and the security is good, and the practicality is strong.
Description
The technical field is as follows:
the utility model relates to a technical field that charges especially relates to a prevent DC direct current plug contact circuit that produces the electric spark.
Background art:
certain arc sparks can be generated during the plugging process of a DC output power plug of a DC power supply and a socket of a loaded DC power supply appliance. The larger the working current and the higher the voltage, the larger the electric spark generated when the plug is plugged in, and the fire hazard is easy to occur on some occasions for storing inflammable goods.
The utility model has the following contents:
an object of the utility model is to provide a prevent that DC direct current plug contact from producing the circuit of electric spark to solve prior art not enough.
The utility model discloses by following technical scheme implement: a circuit for preventing electric sparks generated by contact of a DC (direct current) plug comprises resistors R1 and R2, a capacitor C1, a voltage stabilizing diode D1 and an N-type field effect transistor Q1, wherein one end of the resistor R1 is connected with the positive input end of the DC plug and the positive output end of the DC plug, the other end of the resistor R1 is connected with one end of a resistor R2, the other end of the resistor R2 is connected with the negative input end of the DC plug, the resistor R2 is further connected with the capacitor C1 and the voltage stabilizing diode D1 in parallel, the grid of the N-type field effect transistor Q1 is connected at the connection point of the resistors R1 and R2, the source of the N-type field effect transistor Q1 is connected with the negative input end of the DC plug, and the drain of the N-type field effect transistor Q1.
Furthermore, the negative electrode input end of the direct current plug is connected with a power ground.
Furthermore, the anode of the zener diode D1 is connected to the negative input end of the dc plug, and the cathode of the zener diode D1 is connected to the connection point of the resistors R1 and R2.
The utility model has the advantages that:
the utility model discloses a resistance R1, R2, electric capacity C1, zener diode D1 to and several simple electronic components of N type field effect transistor Q1 design prevents that DC direct current plug contact from producing the circuit of electric spark, avoid direct current power plug to insert and produce the electric arc spark in the contact use, the cost is lower, and the security is good, and the practicality is strong.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of the present invention.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, a circuit for preventing DC direct current plug contact from generating electric spark includes resistors R1, R2, a capacitor C1, a zener diode D1, and an N-type fet Q1, wherein one end of the resistor R1 is connected to the positive input end of the DC plug and the positive output end of the DC plug, the other end of the resistor R1 is connected to one end of a resistor R2, the other end of the resistor R2 is connected to the negative input end of the DC plug, the resistor R2 is further connected in parallel to the capacitor C1 and the zener diode D1, the gate of the N-type fet Q1 is connected to the connection point of the resistors R1 and R2, the source of the N-type fet Q1 is connected to the negative input end of the DC plug, and the drain of the N-type fet Q1 is connected to the.
Wherein, the negative input end of the direct current plug is connected with the power ground. The anode of the voltage-stabilizing diode D1 is connected with the cathode input end of the direct-current plug, and the cathode of the voltage-stabilizing diode D1 is connected with the connecting point of the resistors R1 and R2.
The circuit principle is as follows:
as shown IN fig. 1, DC-IN of the circuit is the plug contact input of the DC power supply and DC-OUT is the appliance terminal of the DC power load. When a DC socket at the DC-IN end of the direct current input end is plugged IN and electrified, the voltage of the G pin of the Q1 cannot suddenly change due to the existence of R1 and C1, at the moment when the DC socket is electrified, the Q1 is not conducted, the current of an electric appliance at the DC-OUT end is removed, and therefore, the DC-IN end does not generate contact arc sparks. When the R1 charges the C1 slowly, the voltage of the C1 rises to the G pin opening voltage of the Q1, the Q1 is conducted, and the current flow at the DC-OUT terminal normally works. D1 is a voltage regulator tube for protecting the G pin voltage of Q1 and avoiding the Q1 from being damaged due to the overhigh G pin voltage. R2 discharges C1, can discharge C1 after the DC-IN cut off the power supply rapidly, make Q1 enter the off-state, avoid producing the arc spark when the DC-OUT end electric apparatus is turned on directly when the DC-IN connects the electricity.
The time from the DC-IN insertion input to the conduction of the Q1 can be adjusted by adjusting the sizes of R1, R2 and C1 according to the RC charge-discharge circuit principle.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A circuit for preventing electric sparks generated by contact of a DC (direct current) plug is characterized by comprising resistors R1 and R2, a capacitor C1, a voltage-stabilizing diode D1 and an N-type field effect transistor Q1, wherein one end of a resistor R1 is connected with a positive input end of the DC plug and a positive output end of the DC plug, the other end of the resistor R1 is connected with one end of a resistor R2, the other end of the resistor R2 is connected with a negative input end of the DC plug, the resistor R2 is further connected with the capacitor C1 and the voltage-stabilizing diode D1 in parallel, a grid of the N-type field effect transistor Q1 is connected at the connection point of the resistors R1 and R2, a source of the N-type field effect transistor Q1 is connected with a negative input end of the DC plug, and a drain of the N-type field effect transistor Q1.
2. The circuit for preventing sparking from DC plug contact according to claim 1, wherein said DC plug negative input terminal is connected to a power ground.
3. The circuit for preventing spark from DC plug contact according to claim 1, wherein the positive terminal of the zener diode D1 is connected to the negative terminal of the DC plug, and the negative terminal of the zener diode D1 is connected to the connection point of the resistors R1 and R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921277325.9U CN210074769U (en) | 2019-08-06 | 2019-08-06 | Circuit for preventing DC direct current plug from contacting to generate electric spark |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921277325.9U CN210074769U (en) | 2019-08-06 | 2019-08-06 | Circuit for preventing DC direct current plug from contacting to generate electric spark |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210074769U true CN210074769U (en) | 2020-02-14 |
Family
ID=69430938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921277325.9U Active CN210074769U (en) | 2019-08-06 | 2019-08-06 | Circuit for preventing DC direct current plug from contacting to generate electric spark |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210074769U (en) |
-
2019
- 2019-08-06 CN CN201921277325.9U patent/CN210074769U/en active Active
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