CN113740572A - Inductive coupler for indirect injection of HEMP short pulse current source - Google Patents
Inductive coupler for indirect injection of HEMP short pulse current source Download PDFInfo
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- CN113740572A CN113740572A CN202110930964.6A CN202110930964A CN113740572A CN 113740572 A CN113740572 A CN 113740572A CN 202110930964 A CN202110930964 A CN 202110930964A CN 113740572 A CN113740572 A CN 113740572A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
Abstract
The invention discloses an inductive coupler for indirect injection of a HEMP short pulse current source, which comprises an input module, a coupling module and an output module. Through the design of matching the input end structure of the input module and the magnetic rings of the coupling part, the separable connection of the HEMP short pulse current source and the coupler is realized, under the condition of meeting the requirements of insulation and voltage resistance, the indirect injection of the pulse current into the tested equipment in a working state and a non-working state is realized, the normal working state of a pulse source circuit is not changed after the coupler is connected into a pulse source, and the output pulse current can meet the requirements of a pulse current injection test when the pulse current of the HEMP short pulse current source is indirectly injected through the coupler.
Description
Technical Field
The invention belongs to the field of transformers, and particularly relates to an inductive coupler for indirect injection of a HEMP short pulse current source.
Background
Along with the development of electromagnetic compatibility technology and the gradual complexity of electromagnetic environment, electronic equipment needs to have certain electromagnetic protection capability to satisfy people's life work requirement to guarantee that it still can normally work when receiving certain degree of electromagnetic interference.
To verify the electromagnetic compatibility of an electronic device, it is often necessary to perform a related tamper resistance test, including a pulsed current injection test. The pulse current injection test is to inject pulse current into the tested electronic equipment in a certain mode, and simulate the working operation condition of the equipment under electromagnetic interference so as to evaluate the anti-interference capability of the equipment.
The manner of pulse current injection includes direct injection and indirect injection. Direct injection needs pass through the cable direct link to each other with the output port of pulse current source and the equipment that is surveyed, and the pulse source has direct electrical contact with the circuit that is surveyed, can change the electrical connection and the operating condition of circuit that is surveyed, consequently can't carry out anti-interference test when equipment work. The indirect injection is to connect the pulse source with the tested object through the inductive capacitive coupler, and the indirectly injected pulse source is not in direct electrical contact with the tested device, so that the physical line and the electrical parameters of the tested object are not influenced. The tested equipment can be tested under working and non-working states. The excitation generated by the inductance-capacitance coupling is injected in an electric field, a magnetic field and the like, and the test process is closer to the real situation that the electromagnetic interference influences the circuit.
In systems where pulsed current injection tests are performed by means of indirect injection, current injection couplers are an important component. The introduction of the coupler can not influence the operation of the original circuit, needs to meet the insulation requirement, and can carry out current injection when the pulse injection source operates at full voltage. The inductive coupler can be regarded as a pulse transformer with one turn of primary and secondary sides, and pulse current is coupled into a secondary side test cable through the primary side of the transformer. The primary and secondary coupling process is magnetic coupling, so the experimental process is non-contact coupling, and continuous running equipment can be tested. Since the permeability of air is 1, the air-core coil cannot perform large current output coupling. The magnetic core is needed to improve the coupling efficiency in the coupler, the leakage inductance of the coupler is increased due to the increase of the magnetic core, the rising edge of the output pulse current waveform is slowed, and the pulse current waveform does not meet the standard requirement due to the excessive leakage inductance. The difficulty in coupler design is therefore the balanced adjustment of the coupling efficiency and the rising edge of the waveform.
Disclosure of Invention
The invention aims to overcome the problems in the prior art, and provides an inductive coupler for indirect injection of a HEMP short pulse current source, which is used for injecting pulse current into load equipment in a coupling manner, reducing the influence of the connection of the coupler on the waveform characteristics of the pulse current as much as possible, realizing a multi-cable common-mode interference test and a non-contact coupling test, and simulating the interfered condition of the equipment in the operation process.
In order to achieve the purpose, the invention adopts the following technical scheme:
an inductive coupler for indirect injection of a HEMP short pulse current source comprises an input module, a coupling module and an output module, wherein one end of the input module is connected with the HEMP short pulse current source, the other end of the input module is connected with the coupling module and receives pulse current output by a pulse source, the coupling module is coupled with the input module and the output module and couples the pulse current of the input module to the output module, one end of the output module is connected with the coupling module, and the other end of the output module is connected with load equipment to output the pulse current.
The invention has the further improvement that the input module comprises an SL-16 socket, a limiting polytetrafluoroethylene tube, a banana socket, a plastic cushion table and a silica gel wire; the SL-16 socket is fixed on a circular hole of the engineering plastic shell, one end of the limiting polytetrafluoroethylene tube is sleeved with the SL-16 socket, the other end of the limiting polytetrafluoroethylene tube is sleeved with the banana socket, the banana socket is fixed on the plastic cushion table, the plastic cushion table is fixed at the inner bottom of the engineering plastic shell, one end of the silica gel wire is connected with the banana socket, the other end of the silica gel wire is connected with the SL-16 socket, and the middle part of the silica gel wire penetrates through a gap between the isolating polytetrafluoroethylene tube and the magnetic ring.
The invention has the further improvement that the coupling module comprises a magnetic ring; the magnetic ring is sleeved outside the isolation polytetrafluoroethylene tube, and two sides of the magnetic ring are tightly attached to the limiting plastic blocks.
The invention has the further improvement that the output module comprises an isolation polytetrafluoroethylene tube, a limiting plastic block and an output loop lead; two ends of the isolation polytetrafluoroethylene tube are fixed on the circular holes of the engineering plastic shell, the limiting plastic block is fixed at the inner top of the engineering plastic shell and clings to two sides of the magnetic ring, two ends of the output loop lead are connected with load equipment, and the middle part of the output loop lead penetrates through the isolation polytetrafluoroethylene tube.
The invention is further improved in that the SL-16 socket is positioned on the outer part of the engineering plastic shell and is provided with external threads, and the middle part of the SL-16 socket is hollowed out.
The further improvement of the invention is that the outside of the silica gel wire insulating layer is wrapped by an insulating adhesive tape.
The invention has the further improvement that the magnetic rings are arranged randomly.
The invention has the further improvement that the magnetic ring is made of manganese zinc ferrite, nickel zinc ferrite, iron silicon magnetic powder core and amorphous material.
Compared with the prior art, the invention has at least the following beneficial technical effects:
the input module, the coupling module and the output module are integrated into the closed box, so that the box is simple in structure, convenient to assemble and carry.
Furthermore, the coupler is butted and fixed with a high-voltage wire through the hollow SL-16 socket arranged at the input end, the problem that the socket is not high-voltage resistant is solved, the voltage-resistant requirement is met, and the high-voltage pulse source and the coupler can be interconnected through the joint socket.
Furthermore, the pulse source and the coupler are relatively independent and separated in a pluggable connection mode of the input module, and the experiment and maintenance of each part are convenient to carry out independently.
Furthermore, a silica gel wire of the input loop is wrapped by an insulating adhesive tape, and the output loop is separated from the input loop through a polytetrafluoroethylene tube channel, so that the input and output electrical isolation is realized, the insulating and voltage-withstanding requirements are met, and the tested equipment can carry out pulse current injection tests through the coupler in working and non-working states.
Furthermore, the coupling module of the invention adopts magnetic rings made of four different materials, namely manganese zinc ferrite, nickel zinc ferrite, iron silicon magnetic powder core and amorphous material, and the combination and matching of the magnetic rings made of different materials meet the requirements that the normal working state of a pulse source circuit is not changed and the rising front edge of the output pulse current waveform is not excessively changed after the coupler is introduced, so that the condition that the coupler has higher coupling efficiency is ensured.
Drawings
FIG. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a schematic diagram of an input/output connection according to the present invention;
FIG. 3 is a schematic diagram of an equivalent circuit of the present invention;
FIG. 4 is a schematic view of a single magnet ring of FIG. 1;
FIG. 5 is a waveform of pulse current output from a preceding HEMP short pulse source connected in accordance with the present invention;
FIG. 6 shows the waveform of the pulse current coupled out after the present invention is applied.
Description of reference numerals:
1. an SL-16 jack; 2. a limiting polytetrafluoroethylene tube; 3. a banana jack; 4. a plastic cushion table; 5. a silicone wire; 6. isolating the polytetrafluoroethylene tube; 7. a limiting plastic block; 8. a magnetic ring; 9. an engineering plastic housing; 10. a high-voltage wire shielding layer; 11. a high voltage line insulating layer; 12. a high-voltage plug; 13. an output loop wire; 14. a load device.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
The internal structure of the inductive coupler for the indirect injection of the HEMP short pulse current source is shown in figure 1, and the connection between the inductive coupler and the pulse source and the connection between the inductive coupler and a load device are shown in figure 2. The external SL-16 socket 1 of the input end of the input module is connected with one pole of a HEMP short pulse source through a high-voltage wire shielding layer 10, the internal part of the input end is connected with a silica gel wire 5 of an input loop through a banana socket 3, and a high-voltage plug 12 which is conducted with the other pole of the pulse source passes through the SL-16 socket 1 and is connected with the banana socket 3. The coupling module is composed of a plurality of magnetic rings 8, and the materials of the magnetic rings 8 comprise manganese zinc ferrite, nickel zinc ferrite, iron silicon magnetic powder cores and amorphous materials. The output module comprises a limiting polytetrafluoroethylene tube 6 used as an output loop channel, a limiting plastic block 7 and an output loop lead 13.
The whole coupler is wrapped by a cuboid engineering plastic shell 9, two round through holes are formed in the upper portion of the engineering plastic shell 9 and used for installing and fixing an isolation polytetrafluoroethylene tube 6 of an output module, and a round through hole is formed in the lower portion of the engineering plastic shell and used for installing and fixing an SL-16 socket 1 of the input module.
The input end of the input module is a hollow SL-16 socket 1 which is embedded in a circular groove below the engineering plastic shell 9, and the connectors of the SL-16 socket 1 outside and inside the shell are male connectors with external threads. The external connector of the SL-16 socket 1 is used for butting the connector of the high-voltage wire shielding layer 11 and fixing the external connection of the input end, and the internal connector of the SL-16 socket 1 is connected with one end of the silica gel wire 5 of the input loop.
For an input module in the shell, the plastic pad table 4 is fixed with the bottom of the engineering plastic shell 9 through hot melt adhesive, the banana socket 3 is fixed on the plastic pad table 4, one end of the banana socket 3 is in butt joint with a high-voltage plug 12 penetrating through the SL-16 socket 1, and the other end of the banana socket 3 is connected with the other end of the silica gel wire 5.
A fixed limit polytetrafluoroethylene tube 2 is arranged between the SL-16 socket 1 and the banana socket 3 and is used for fixing the positions of a high-voltage wire 11 and a high-voltage plug 12 which are inserted into the engineering plastic shell 9.
The outside of the silica gel line 5 is wrapped by an insulating adhesive tape, one end of the silica gel line is connected with the SL-16 socket 1, and the other end of the silica gel line is connected with the banana socket 3. The silica gel wire 5 passes through the inside of the magnetic ring 8 from the outside of the teflon tube 6 of the output module.
The magnetic ring 8 is hung on the limiting polytetrafluoroethylene tube 6 of the output module in a sleeved mode, and the distance between the lower inner side of the magnetic ring 8 and the outer side of the limiting polytetrafluoroethylene tube 6 is not less than 4mm so that the silica gel wire 5 can penetrate through the magnetic ring. The left end and the right end of the magnetic ring 8 are fixed with the limiting plastic blocks 7, and the limiting plastic blocks 7 are fixed above the inside of the engineering plastic shell 9 by hot melt adhesive.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Finally, the experimental conditions of the present invention on the influence of the waveform of the output current of the HEMP short pulse current source are as follows. The output current waveform of the HEMP short pulse current source used in combination with the invention is shown in figure 5, and the output current waveform is the rising edge 25.60ns of the double-exponential pulse and the peak value 520A. The output current waveform after coupling by the coupler is shown in figure 6, and the output current waveform is a double-exponential pulse rising edge 34.40ns and a peak value 496A. It can be seen from the comparison between the output current waveforms of fig. 5 and fig. 6 that the present invention satisfies the condition that after the introduction, the normal working state of the pulse source circuit is not changed, the rising front edge of the output pulse current waveform is not excessively changed, and the high coupling efficiency can be ensured.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The inductive coupler for the indirect injection of the HEMP short pulse current source is characterized by comprising an input module, a coupling module and an output module, wherein one end of the input module is connected with the HEMP short pulse current source, the other end of the input module is connected with the coupling module to receive pulse current output by a pulse source, the coupling module is coupled with the input module and the output module to couple the pulse current of the input module to the output module, one end of the output module is connected with the coupling module, the other end of the output module is connected with load equipment, and the pulse current is output.
2. The inductive coupler for indirect injection of a HEMP short-pulse current source according to claim 1, wherein the input module comprises an SL-16 socket (1), a position-limited Teflon tube (2), a banana socket (3), a plastic pad (4), and a silica gel wire (5); SL-16 socket (1) is fixed on the circular hole of engineering plastics shell (9), SL-16 socket (1) is cup jointed to spacing polytetrafluoroethylene pipe (2) one end, banana socket (3) is cup jointed to the other end, banana socket (3) are fixed on plastics pad platform (4), plastics pad platform (4) are fixed at the interior bottom of engineering plastics shell (9), banana socket (3) are connected to silica gel line (5) one end, SL-16 socket (1) is connected to the other end, the mid portion passes in the clearance between isolation polytetrafluoroethylene pipe (6) and magnetic ring (8).
3. The inductive coupler for indirect injection of a HEMP short-pulse current source as claimed in claim 2, wherein the SL-16 socket (1) is externally threaded at the outer part of the engineering plastic shell (9) and is hollowed out at the middle part.
4. The inductive coupler for indirect injection of a HEMP short-pulse current source as claimed in claim 2, wherein the outside of the insulation layer of the silica gel line (5) is wrapped with an insulation tape.
5. The inductive coupler for indirect injection of a HEMP short pulse current source of claim 1, wherein the output module comprises an isolating Teflon tube (6), a limiting plastic block (7), and an output loop wire (13); two ends of the isolation polytetrafluoroethylene tube (6) are fixed on a circular hole of the engineering plastic shell (9), the limiting plastic block (7) is fixed at the inner top of the engineering plastic shell (9) and clings to two sides of the magnetic ring (8), two ends of the output loop lead (13) are connected with load equipment (14), and the middle part of the isolation polytetrafluoroethylene tube (6) penetrates through the inner part of the isolation polytetrafluoroethylene tube.
6. An inductive coupler for indirect injection of a HEMP short pulse current source as claimed in claim 1, wherein the coupling module comprises a magnetic loop (8); the magnetic ring (8) is sleeved outside the isolation polytetrafluoroethylene tube (6), and two sides of the magnetic ring are tightly attached to the limiting plastic block (7).
7. An inductive coupler for indirect injection of a HEMP short pulse current source as claimed in claim 6, characterized in that the magnetic ring (8) is arranged arbitrarily.
8. The inductive coupler for indirect injection of a HEMP short-pulse current source as claimed in claim 6, wherein the magnetic ring (8) is made of Mn-Zn ferrite, Ni-Zn ferrite, Fe-Si magnetic powder core and amorphous material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110930964.6A CN113740572A (en) | 2021-08-13 | 2021-08-13 | Inductive coupler for indirect injection of HEMP short pulse current source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110930964.6A CN113740572A (en) | 2021-08-13 | 2021-08-13 | Inductive coupler for indirect injection of HEMP short pulse current source |
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|---|---|
| CN113740572A true CN113740572A (en) | 2021-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110930964.6A Pending CN113740572A (en) | 2021-08-13 | 2021-08-13 | Inductive coupler for indirect injection of HEMP short pulse current source |
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| CN (1) | CN113740572A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115149236A (en) * | 2022-07-25 | 2022-10-04 | 西安交通大学 | Non-contact capacitive coupling device for high-altitude electromagnetic pulse conducted interference injection and use method thereof |
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2021
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Application publication date: 20211203 |
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