CN215817917U - Disturbance suppression device for electric fast transient pulse group - Google Patents
Disturbance suppression device for electric fast transient pulse group Download PDFInfo
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- CN215817917U CN215817917U CN202122326972.8U CN202122326972U CN215817917U CN 215817917 U CN215817917 U CN 215817917U CN 202122326972 U CN202122326972 U CN 202122326972U CN 215817917 U CN215817917 U CN 215817917U
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Abstract
The utility model relates to the technical field of suppression circuits, in particular to an electric fast transient pulse group disturbance suppression device which comprises a connecting wire used for connecting a power supply and electric equipment, wherein the connecting wire comprises a live wire, a zero line and a ground wire, and the live wire, the zero line and the ground wire are all connected with an inductor and a ferrite magnetic ring in series; and capacitors are connected between the live wire and the ground wire and between the zero line and the ground wire. The device is connected between a power supply and electric equipment, when the power supply outputs current, the ferrite magnetic ring is matched with the inductor to absorb a part of electromagnetic waves, meanwhile, the capacitor further filters a part of electromagnetic waves, and finally, common mode interference formed by the electric fast transient pulse group is coupled into the ground through the ground wire, so that disturbance suppression of the electric fast transient pulse group is realized, and the electric equipment is protected from normal work.
Description
Technical Field
The utility model relates to the technical field of suppression circuits, in particular to an electric fast transient pulse group disturbance suppression device.
Background
Electrical fast transient burst interference is the interference generated by numerous mechanical switches in the grid when switching inductive loads. Such interference is characterized by: narrow pulses that appear in clusters, high repetition frequency of the pulses (of the order of kHz-MHz), steep rising edges (of the order of ns), short duration of a single pulse (of the order of 10-100 ns), amplitudes up to the order of kV. The narrow pulses that occur in clusters can charge the junction capacitance of the semiconductor device, which can cause line or device errors when energy is accumulated to some extent.
Because various devices are arranged in the power grid at present, the switching is frequent, and the generated disturbance signals of the electric fast transient pulse group can enter some sensitive devices through conductive coupling. The electronic circuit is relatively sensitive to impulse disturbances. If the electronic circuit contains digital circuits, the electronic circuit is more sensitive to impulse disturbance. The disturbance signal of the electric fast transient pulse group entering the electronic circuit makes the electronic circuit work abnormally through direct triggering and electric induction coupling. To solve the above problems, an electrical fast transient burst disturbance suppression device needs to be added to the circuit to protect the equipment from working normally.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention aims to provide an electrical fast transient burst disturbance suppression device.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
an electric fast transient pulse group disturbance suppression device comprises a connecting wire used for connecting a power supply and electric equipment, wherein the connecting wire comprises a live wire, a zero line and a ground wire, and the live wire, the zero line and the ground wire are all connected with an inductor and a ferrite magnetic ring in series; and capacitors are connected between the live wire and the ground wire and between the zero line and the ground wire.
The advantage of this scheme of adoption lies in:
when the device is used, the device is connected between a power supply and electric equipment, when the power supply outputs current, the ferrite magnetic ring is matched with the inductor to absorb a part of electromagnetic waves, meanwhile, the capacitor further filters a part of electromagnetic waves, and finally common-mode interference formed by the electric fast transient pulse group is coupled into the ground through the ground wire, so that disturbance suppression of the electric fast transient pulse group is realized, and normal work of the electric equipment is protected.
The connecting wire, the inductor and the ferrite magnetic ring are all packaged in the shell; and the live wire, the zero line and the ground wire comprise an access end connected with a power supply and an output end connected with electric equipment.
Furthermore, the access end and the access end are both positioned outside the shell.
Further, the ground wire is electrically connected with the shell.
Furthermore, the live wire includes 3, all connects the electric capacity between every live wire and the ground wire, and all connects inductance and ferrite bead in series on every live wire.
Further, the capacitor is a ceramic capacitor, and/or the inductance value of the inductor is greater than 10 uH.
Other advantages and effects of the utility model are specifically set forth in the detailed description section.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the present invention applied to a three-phase power supply;
FIG. 3 is a schematic diagram of the present invention applied to a DC power supply;
fig. 4 is a schematic diagram of the present invention applied to the commercial power.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in order to make the technical solution of the present invention easier to understand and understand.
Example (b):
as shown in fig. 1, the present embodiment provides an electrical fast transient burst disturbance suppression apparatus, which includes a connection line for connecting a power source and a consumer, where the consumer may be a household appliance, such as an air conditioner, and the connection line is mainly used for connecting the power source and the consumer.
The connecting wire comprises a live wire, a zero line N and a ground wire G, and the live wire, the zero line N and the ground wire G are all connected with an inductor L and a ferrite magnetic ring 2 in series; and capacitors C are connected between the live wire and the ground wire G and between the zero line N and the ground wire G.
When the device is used, the device is connected between a power supply and electric equipment, when the power supply outputs current, the ferrite magnetic ring 2 is matched with the inductor L to absorb a part of electromagnetic waves, meanwhile, the capacitor C further filters a part of electromagnetic waves, and finally common-mode interference formed by the electric fast transient pulse group is coupled into the ground through the ground wire G, so that disturbance suppression of the electric fast transient pulse group is realized, and normal work of the electric equipment is protected.
In order to design the device as an integrated module for convenient use, the device further comprises a shell 1, and the connecting wire, the inductor L and the ferrite bead 2 are all packaged in the shell 1.
The ground wire G is electrically connected with the shell 1, so that the wire G can be communicated with the ground through the shell 1; the live wire, the zero line N and the ground wire G respectively comprise an incoming end 12 connected with a power supply and an outgoing end 11 connected with electric equipment, the ferrite magnetic ring 2 is positioned on one side of the incoming end 12, and the inductor L is positioned on one side of the outgoing end 11; the presence of the incoming end 12 and the outgoing end 11 is mainly used to provide a connection point for connecting a power source and an electrical device, and in use, the power source is connected to the incoming end 12, and the electrical device is connected to the outgoing end 11, so that the device is connected between the power source and the electrical device.
For convenience of access and exit, in this embodiment, the access end 12 and the exit end 11 are both located outside the housing 1, and of course, outside the housing 1 herein mainly refers to the outside of the housing 1, including on the outer wall of the housing 1; as for the specific form of the input end 12 and the output end 11, both ends of the connecting line extend out of the housing 1, and both ends of the connecting line are used as the input end 12 and the output end 11, taking a live wire as an example, both ends of the live wire respectively penetrate through the side walls of both sides of the housing 1 to be used as the input end 12 and the output end 11; of course, two interfaces or terminals connected to two ends of the connection line may be directly disposed on the housing 1, and the interfaces or terminals may serve as the input end 12 and the output end 11 for connecting the electric device and the power source.
In order to improve the adaptability of the device, in the present embodiment, the number of the live wires specifically includes 3, namely, live wires L1, L2 and L3, so as to adapt to a three-phase power supply; 3 live wires are independently arranged; and a capacitor C is connected between each live wire and the ground wire G, namely, a capacitor C is electrically connected between the live wire L1 and the electric wire G, between the live wire L2 and the electric wire G and between the live wire L3 and the electric wire G.
Each live wire is connected with an inductor L and a ferrite magnetic ring 2 in series, namely, live wires L1, L2 and L3 are connected with the inductor L and the ferrite magnetic ring 2 in series.
As a preferred embodiment, the capacitor C is a ceramic capacitor, and the inductance L of the inductance L has an inductance L value greater than 10 uH.
Because the selected power supply is different, the wiring mode of the device is also different, and the following description is respectively given for the power supply adopting three-phase power supply, direct-current power supply and commercial power:
(1) and a three-phase power supply:
as shown in fig. 2, when in use, the incoming ends 12 of the live line L1, the live line L2, the live line L3, the neutral line N, and the ground line G are respectively and correspondingly connected with a three-phase power supply, and the outgoing ends 11 of the live line L1, the live line L2, the live line L3, the neutral line N, and the ground line G are connected with an electric device, and at this time, the shell 1 may be grounded or not grounded.
(2) Commercial power:
as shown in fig. 3, a ground wire G, a zero line N, and any one of three live wires are selected to form a connection line for connecting a power supply and an electric device, for example, a live wire L1, a ground wire G, and a zero line N are adopted, when wiring, the input end 12 of the live wire L1, the ground wire G, and the zero line N is connected to a commercial power, the output end 11 of the live wire L1, the ground wire G, and the zero line N is connected to the electric device, and the casing 1 may be grounded or not grounded.
(3) And a direct current power supply:
as shown in fig. 4, there is generally no ground terminal for the dc power supply, so that only one of the zero line N and the 3 live lines needs to be connected between the electric equipment and the power supply; for example, live wire L1 and zero line N are adopted, at this moment, connect DC power supply with live wire L1 and zero line N incoming end 12, be connected live wire L1 and zero line N's the end of meeting 11 and consumer, can get into the ground with the common mode interference coupling that electric fast transient pulse crowd formed in order to guarantee the device, casing 1 needs ground connection this moment, the during operation, the interference electromagnetic signal passes through ground wire G and leads to casing 1, finally by the leading-in ground of casing 1 ground connection.
The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the present invention.
Claims (6)
1. An electric fast transient pulse group disturbance suppression device is characterized by comprising a connecting wire for connecting a power supply and electric equipment, wherein the connecting wire comprises a live wire, a zero line and a ground wire, and the live wire, the zero line and the ground wire are all connected with an inductor and a ferrite magnetic ring in series; and capacitors are connected between the live wire and the ground wire and between the zero line and the ground wire.
2. An electrical fast transient burst disturbance suppression device as defined in claim 1, further comprising a housing, said connecting wires, inductor and ferrite bead being enclosed within said housing; and the live wire, the zero line and the ground wire comprise an access end connected with a power supply and an output end connected with electric equipment.
3. An electrical fast transient burst disturbance suppression device as claimed in claim 2, wherein said input and output terminals are located outside said housing.
4. An electric fast transient burst disturbance suppression device as claimed in claim 2 or 3 wherein said ground line is electrically connected to said housing.
5. An electrical fast transient burst disturbance rejection device as claimed in claim 1 wherein said live wires comprise 3 live wires, each live wire having a capacitor connected to ground, and each live wire having an inductor and a ferrite bead connected in series.
6. An electric fast transient burst disturbance suppression device as claimed in claim 1, wherein said capacitor is a ceramic capacitor and/or said inductor has an inductance value greater than 10 uH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122326972.8U CN215817917U (en) | 2021-09-24 | 2021-09-24 | Disturbance suppression device for electric fast transient pulse group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122326972.8U CN215817917U (en) | 2021-09-24 | 2021-09-24 | Disturbance suppression device for electric fast transient pulse group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215817917U true CN215817917U (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122326972.8U Active CN215817917U (en) | 2021-09-24 | 2021-09-24 | Disturbance suppression device for electric fast transient pulse group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215817917U (en) |
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2021
- 2021-09-24 CN CN202122326972.8U patent/CN215817917U/en active Active
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