CN214845554U - Power port injection device for EFT test - Google Patents
Power port injection device for EFT test Download PDFInfo
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- CN214845554U CN214845554U CN202121331378.1U CN202121331378U CN214845554U CN 214845554 U CN214845554 U CN 214845554U CN 202121331378 U CN202121331378 U CN 202121331378U CN 214845554 U CN214845554 U CN 214845554U
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Abstract
The utility model discloses a power port injection device for EFT is experimental belongs to electric and electronic equipment EMC and detects technical field, is applicable to high power, heavy current and is greater than or equal to 16A electrical system test. The structure of the high-current testing device comprises a high-current wiring terminal connected with a ground wire, a neutral wire and a phase wire, wherein the high-current wiring terminal is used for being connected with a power supply end of a device to be tested; coupling capacitors are respectively arranged on the ground wire, the neutral wire and the phase wire, the other sides of the coupling capacitors are electrically connected to a signal injection terminal, and the signal injection terminal is used for being connected with a signal injection cable of the test generator. Coupling capacitance is located metal casing's inside, and metal casing's both sides all are provided with ground terminal. The utility model discloses the technical scheme of example is applicable to and carries out electric fast transient pulse crowd immunity test to the electric and electronic equipment that use the heavy current, has advantages such as the structure is simple and easy, with low costs, small, easy operation, security are good, offers convenience for the measurement personnel.
Description
Technical Field
The utility model belongs to the technical field of electric and electronic equipment EMC (electromagnetic compatibility) detects, specifically speaking is a power port injection device for EFT is experimental, is applicable to that EMC carries out electric fast transient pulse crowd immunity (EFT) test to electric and electronic equipment who uses the heavy current in detecting.
Background
An electrical fast transient burst immunity (EFT) test is a test in which a burst of many fast transient pulses is coupled to power, control, signal and ground ports of electrical and electronic equipment. GB/T17626.4 electromagnetic compatibility test and measurement technology electric fast transient pulse burst immunity test stipulates that the immunity performance of the equipment is evaluated according to the evaluation basis and the test method reproduced by the common energy.
At present, a schematic diagram of a typical layout of a test for conducting an electrical fast transient burst immunity test is shown in fig. 1 of the attached drawings of the specification, and as can be seen from fig. 1, a main equipment unit comprises: the device comprises an electric fast transient pulse burst generator 1, a coupling device, a decoupling network, a ground reference plane and a device to be tested (EUT) 2, wherein the device to be tested is placed on an insulating support, and the electric fast transient pulse burst generator 1 is connected with an alternating current power supply 3.
When performing EFT tests on electrical and electronic devices, a commonly used electrical fast transient burst generator 1 generally uses a built-in coupling/decoupling network, which is often suitable for testing devices with small current, and for performing field tests on large-current three-phase devices, such testing devices are not suitable, and an extra coupling/decoupling network (CDN) is often customized for testing.
Because the large-current equipment needs to customize an additional coupling and decoupling network, the defects of long customization period, high price, large volume and the like exist, and great inconvenience is brought to the EFT test of the large-current equipment.
SUMMERY OF THE UTILITY MODEL
In order to solve the deficiencies in the prior art, the utility model aims to provide a power port injection device for EFT is experimental, the device have the structure simple and easy, with low costs, small, easy operation, security advantage such as good, facilitate for the measurement personnel.
The utility model provides a technical scheme that its technical problem adopted does:
the power port injection device for the EFT test comprises a high-current wiring terminal connected with a ground wire, a neutral wire and a phase wire, wherein the high-current wiring terminal is used for being connected with a power supply end of equipment to be tested; coupling capacitors are respectively arranged on the ground wire, the neutral wire and the phase wire, the other sides of the coupling capacitors are electrically connected to a signal injection terminal through the corresponding ground wire, the neutral wire and the phase wire, and the signal injection terminal is used for being connected with a signal injection cable of the test generator.
Furthermore, the coupling capacitor is located inside the metal shell, and the large-current wiring terminal and the signal injection terminal are both located on the metal shell.
Furthermore, both sides of the metal shell are provided with grounding terminals.
Furthermore, the large-current wiring terminal is in one-to-one correspondence with the ground wire, the neutral wire and the phase wire.
Furthermore, only one signal injection terminal is arranged, and the ground wire, the neutral wire and the phase wire which are connected with the coupling capacitor are all converged on the signal injection terminal.
Furthermore, the metal shell is rectangular, and two sides of the metal shell are provided with side plates extending outwards.
Further, the ground terminal is mounted on the side plate.
Furthermore, the large-current wiring terminals all adopt banana head interfaces, and the signal injection terminals adopt coaxial cable interfaces.
Further, the coupling capacitance adopts a capacitance of 33 +/-6.6 nF.
Further, the phase lines are three.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a power port injection device for EFT is experimental, be provided with coupling capacitor, coupling capacitor has sufficient withstand voltage and bandwidth, the equipment to be tested (EUT) of heavy current passes through coupling capacitor and pours into interfering signal into, need not the extra coupling of customization decoupling network, the customization cycle length of having avoided the extra coupling of customization decoupling network to bring is higher, the price is great shortcoming, it is simple and easy to have the structure, with low costs, small, easy operation, advantages such as security is good, bring the facility for the measurement personnel.
2. The utility model discloses a power port injection device for EFT is experimental, be provided with metal casing, metal casing forms the guard action to the part of inside, the placing of the device of also being convenient for, and heavy current binding post and signal injection terminal all are located metal casing, and the plug of the cable of being convenient for, the detection personnel's of being convenient for operation.
3. The utility model discloses a power port injection device for EFT test, the both sides of metal casing all are provided with ground terminal, have guaranteed the security that the device used; the metal shell is rectangular, so that the metal shell is more stable to place; the side plates are arranged on two sides of the metal shell, so that the stability of the device is improved, the grounding terminal is convenient to install through the side plates, and the device is convenient to manufacture.
4. The utility model discloses a power port injection device for EFT is experimental, heavy current binding post with ground wire, central line and phase line one-to-one set up, and the signal injection terminal only sets up one, with experimental generator and the fine matching of the equipment that awaits measuring, is convenient for connect the operation.
5. The power port injection device for the EFT test of the example of the utility model adopts banana head interfaces for large current wiring terminals, which is convenient and safe; the coupling capacitor adopts a capacitor of 33 +/-6.6 nF, and meets the requirements of relevant standards; the phase line is provided with three, is applicable to the three-phase alternating current of universal adoption, and the adaptability is good.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a typical prior art test arrangement for performing an electrical fast transient burst immunity test;
fig. 2 is a schematic structural diagram of an embodiment of the present invention;
fig. 3 is a schematic external structural diagram of an embodiment of the present invention;
fig. 4 is a schematic diagram of a test arrangement in use of an embodiment of the present invention.
In the figure: the device comprises a 1-electric fast transient pulse group generator (with a coupling/decoupling network inside), 2-devices to be tested, 3-an alternating current power supply, 4-a metal shell, 5-a grounding terminal, 6-a signal injection cable, 7-a signal injection terminal, 8-a large-current wiring terminal, 9-a test generator, L1, L2, L3-a phase line, an N-neutral line, a PE-ground line and a Cc-coupling capacitor.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.
The components of the embodiments of the present invention, as 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 accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
As shown in fig. 2 and 3, an embodiment of the utility model provides a power port injection device for EFT test, including being connected with the heavy current binding post 8 of ground wire PE, central line N and phase line, in this embodiment, the phase line is provided with three, is L1, L2 and L3 respectively, with the three-phase alternating current looks adaptation of current commonly used. The large-current wiring terminal 8 is used for being connected with a power supply end of the device to be tested 2; coupling capacitors Cc are respectively arranged on the ground wire PE, the neutral wire N and the phase wires L1, L2 and L3, the other side of each coupling capacitor Cc is connected to a signal injection terminal 7 through the corresponding ground wire PE, the neutral wire N and the phase wires L1, L2 and L3, and the signal injection terminal 7 is used for being connected with a signal injection cable 6 of the test generator 9.
As shown in fig. 3, the coupling capacitor Cc is located inside the metal housing 4, and the large current connection terminal 8 and the signal injection terminal 7 are both located on the metal housing 4. To ensure safety in use, both sides of the metal case 4 are provided with ground terminals 5.
The metal shell 4 is rectangular, side plates extending outwards are arranged on two sides of the metal shell 4, and the grounding terminal 5 is mounted on the side plates. This structural style can enough make metal casing place firmly, and the internal part is convenient for walk the line, is convenient for again the installation of ground terminal 5.
In order to facilitate connection between the test generator 9 and the device to be tested 2, the large-current wiring terminal 8 is arranged in one-to-one correspondence with the ground wire PE, the neutral wire N and the phase wires L1, L2 and L3; only one signal injection terminal 7 is provided, and the ground line PE, the neutral line N, and the phase lines L1, L2, and L3 to which the coupling capacitor Cc is connected are all collected to the signal injection terminal 7. The large-current wiring terminals 8 are all banana head interfaces, so that convenience and safety are realized; the signal injection terminal 7 adopts a coaxial cable interface in the prior art, which is also called a coaxial cable interface.
Preferably, the coupling capacitance is 33 +/-6.6 nF, and meets the requirements of relevant standards of capacitive coupling devices.
As shown in fig. 4, during testing, the test generator 9, the device to be tested 2 and the power port injection device of this embodiment are all reliably grounded, the signal injection cable 6 of the test generator 9 is connected to the signal injection terminal 7, the high-current connection terminal 8 and the power supply terminal of the device to be tested 2 are connected together in a one-to-one correspondence manner by using the connection line, the device to be tested 2 is connected to the ac power supply 3, and the test generator 9 and the device to be tested 2 are supplied with power by the ac power supply. Specifically, one end of the connecting wire is connected to the large-current wiring terminal 8 of the L1, the L2, the L3, or the N, PE, and the other end of the connecting wire is connected to the same terminal position as the power supply end of the device to be tested 2. And (3) connecting the test generator 9 with the alternating current power supply 3, finishing the arrangement of the test equipment, and carrying out the next test according to the steps of the conventional EFT test.
The test generator 9 used in this embodiment is a pulse burst generator, also called a burst pulse generator, and is EFT test equipment in the prior art. In fig. 4, for clarity, the large-current connection terminal 8 including L1, L2, L3, and N, PE is simplified into one cable by a simple expression method, and in actual operation, the large-current connection terminal is generally divided into five cables, and each cable corresponds to a corresponding connection terminal (interface).
The test requires the operation of the device in a dry environment, and the test device 2 and the test generator 9 can be powered up only after the test device and the device to be tested 2 are completely connected. The power supply size and the protection function of the fusing of the AC power supply are both in accordance with the electrical code and EUT requirements. Improper alignment, installation, wiring, operation, or grounding can affect the safety features of the test system. Both the test system and the device under test 2 are live during testing and the power must be cut off first for any operation to be performed on the device under test 2 or the coupling means.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Besides the technical features described in the specification, other technical features are known to those skilled in the art, and further description of the other technical features is omitted here in order to highlight the innovative features of the present invention.
Claims (10)
1. A power port injection device for an EFT test is characterized by comprising a high-current wiring terminal connected with a ground wire, a neutral wire and a phase wire, wherein the high-current wiring terminal is used for being connected with a power supply end of equipment to be tested; coupling capacitors are respectively arranged on the ground wire, the neutral wire and the phase wire, the other sides of the coupling capacitors are electrically connected to a signal injection terminal through the corresponding ground wire, the neutral wire and the phase wire, and the signal injection terminal is used for being connected with a signal injection cable of the test generator.
2. The power port injection device for EFT testing of claim 1, wherein the coupling capacitor is located inside a metal casing, and the high current connection terminal and the signal injection terminal are both located on the metal casing.
3. The power port injection device for EFT testing of claim 2, wherein both sides of the metal housing are provided with ground terminals.
4. The power port injection device for EFT testing of claim 1, wherein the high current terminals are disposed in one-to-one correspondence with the ground, neutral and phase lines.
5. The power port injection device for EFT testing of claim 1, wherein only one signal injection terminal is provided, and a ground line, a neutral line and a phase line connected with a coupling capacitor are converged onto the signal injection terminal.
6. The power port injection device for EFT testing of claim 3 wherein the metal casing is rectangular and has outwardly extending side plates on both sides.
7. The power port injection device for EFT testing of claim 6, wherein the ground terminal is mounted on the side plate.
8. The power port injection device for EFT testing of claim 1, wherein the high current terminals are all banana head interfaces and the signal injection terminal is a coaxial cable interface.
9. The power port injection device for EFT testing of claim 1, wherein the coupling capacitance is 33 ± 6.6 nF.
10. The power port injection apparatus for EFT testing of claim 1 wherein the phase lines are provided in three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121331378.1U CN214845554U (en) | 2021-06-16 | 2021-06-16 | Power port injection device for EFT test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121331378.1U CN214845554U (en) | 2021-06-16 | 2021-06-16 | Power port injection device for EFT test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214845554U true CN214845554U (en) | 2021-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121331378.1U Active CN214845554U (en) | 2021-06-16 | 2021-06-16 | Power port injection device for EFT test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214845554U (en) |
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2021
- 2021-06-16 CN CN202121331378.1U patent/CN214845554U/en active Active
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