Multi-coupling network switching device

Abstract

The invention provides a multi-coupling network switching device which comprises a combination wave generator used for transmitting a surge interference signal or an electrical fast transient pulse train interference signal; the first coupling network comprises a first coupling sub-network, a second coupling sub-network and a first change-over switch group; the second coupling network comprises a third coupling sub-network, a fourth coupling sub-network and a second change-over switch group; and the third change-over switch group is respectively connected with the first coupling network and the second coupling network and is used for realizing switching between the first coupling network and the second coupling network. According to the invention, through the multiple change-over switch groups, multiple coupling networks can be flexibly switched, so that different interference signals are respectively coupled to the tested equipment, and integration of electrical fast transient burst immunity and surge immunity tests is realized.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electromagnetic compatibility testing equipment, and in particular to a multi-coupling network switching device. Background Art

[0002] In the industrial and medical fields, electromagnetic compatibility testing of products is an important link in whether a product can be put on the market, and electrical fast transient pulse group immunity test and surge (impact) immunity test are two very important tests in electromagnetic compatibility testing.

[0003] However, the current EFT and surge (impact) immunity tests still have the following problems: when performing surge and EFT immunity tests on the power ports of high-power active devices, there is no suitable coupling network on the market. At the same time, high-power active devices are often complex and bulky, and two different test devices are required to perform the above two immunity tests on them. During the test, frequent wiring and disconnection arrangements are required, which is very complicated. Summary of the invention

[0004] In view of the above problems, an embodiment of the present disclosure provides a multi-coupling network switching device.

[0005] One aspect of the present disclosure provides a multi-coupling network switching device, including: a combination wave generator, used to transmit a surge interference signal or an electrical fast transient pulse group interference signal; a first coupling network, including a first coupling sub-network, a second coupling sub-network and a first switching switch group, the first coupling sub-network is used to convert the surge interference signal into a first interference signal and couple it to a power port of a test device, the first interference signal is used to apply surge differential mode interference to the test device; the second coupling sub-network is used to convert the surge interference signal into a second interference signal and couple it to the power port, the second interference signal is used to apply surge common mode interference to the test device; the first switching switch group is used to control the surge interference signal to flow to the first coupling sub-network or the second coupling sub-network; the second coupling network, including a first coupling sub-network, a second coupling sub-network and a first switching switch group. Three coupling sub-networks, a fourth coupling sub-network and a second switching switch group, the third coupling sub-network is used to convert the electrical fast transient pulse group interference signal into a third interference signal and couple it to the power port, the third interference signal is used to apply the electrical fast transient pulse group single-line interference to the test device; the fourth coupling sub-network is used to convert the electrical fast transient pulse group interference signal into a fourth interference signal and couple it to the power port, the fourth interference signal is used to apply the electrical fast transient pulse group multi-line interference to the test device; the second switching switch group is used to control the electrical fast transient pulse group interference signal to flow to the third coupling sub-network or the fourth coupling sub-network; the third switching switch group is connected to the first coupling network and the second coupling network respectively, and is used to realize the switching between the first coupling network and the second coupling network.

[0006] According to an embodiment of the present disclosure, the first coupling subnetwork is partially connected in parallel with the second coupling subnetwork, the first switching switch group includes a first switch and a second switch, there are multiple power ports, and the first coupling subnetwork includes: a first capacitor, which is arranged between the combination wave generator and the first switch; the second coupling subnetwork includes: a first resistor, which is connected to the combination wave generator; a second capacitor, which is arranged between the first resistor and the second switch; the multi-coupling network switching device also includes: a first multi-way switch, the first end of the first multi-way switch is respectively connected to the first switch and the second switch, and the second end of the first multi-way switch is respectively connected to one of the multiple power ports.

[0007] According to an embodiment of the present disclosure, the first switching switch group also includes: a third switch, connected to the combination wave generator; the first coupling subnetwork also includes: a second multi-way switch, the first end of the second multi-way switch is connected to the third switch, and the second end of the second multi-way switch is respectively connected to one of the multiple power ports.

[0008] According to an embodiment of the present disclosure, the first multi-way switch and the second multi-way switch have the same number of ways, and the lines connected to the same power port are interlocked.

[0009] According to an embodiment of the present disclosure, the power port includes a ground port, the first switching switch group also includes a fourth switch, the first end of the fourth switch is connected to the combination wave generator, and the second end of the fourth switch is connected to the ground port; the first switch and the third switch are turned on and off at the same time, and the second switch and the fourth switch are turned on and off at the same time; when the first switch is closed, the first coupling network is characterized as a surge differential mode coupling network, and when the second switch is closed, the first coupling network is characterized as a surge common mode coupling network.

[0010] According to an embodiment of the present disclosure, the second switching switch group includes a fifth switch, there are multiple power ports, and the third coupling sub-network includes: a third capacitor, connected to the fifth switch; a third multi-way switch, the first end of the third multi-way switch is connected to the third capacitor, and the second end of the third multi-way switch is respectively connected to one of the multiple power ports; wherein, when the fifth switch is closed, the second coupling network is characterized as a single-line coupling network of an electrical fast transient pulse group.

[0011] According to an embodiment of the present disclosure, the second switching switch group also includes: a sixth switch, connected to the combination wave generator; the fourth coupling sub-network includes: a plurality of fourth capacitors, the first ends of the plurality of fourth capacitors are respectively connected to the sixth switch, the second ends of the plurality of fourth capacitors are respectively connected to one of the plurality of power ports, and the number of the fourth capacitors is the same as the number of the power ports; wherein, when the sixth switch is closed, the second coupling network is characterized as a full-line coupling network of an electrical fast transient pulse group.

[0012] According to an embodiment of the present disclosure, the second ends of the multiple fourth capacitors are respectively connected to one of the second ends of the third multi-way switch, and the third switching switch group is respectively connected to the second end of the first multi-way switch and the second end of the third multi-way switch to realize switching between the first coupling network and the second coupling network.

[0013] According to an embodiment of the present disclosure, the first interference signal, the second interference signal, the third interference signal and the fourth interference signal are output through multiple output ports, the multiple output ports correspond one-to-one to the multiple power ports respectively, and the output ports use banana bases.

[0014] According to an embodiment of the present disclosure, the rated current of the device under test is greater than 200A.

[0015] According to the embodiments of the present disclosure, by flexibly switching the surge common-mode coupling network, the surge differential-mode coupling network, the EFT pulse group single-line coupling network and the EFT pulse group multi-line coupling network through a variety of switches, different interference signals can be coupled to the test equipment respectively, thereby realizing the integration of the EFT pulse group immunity test and the surge immunity test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above contents and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0017] Figure 1 A network structure diagram of a multi-coupling network switching device according to an embodiment of the present disclosure is schematically shown;

[0018] Figure 2 A circuit diagram of a multi-coupling network switching device according to an embodiment of the present disclosure is schematically shown;

[0019] Figure 3 Schematically shows an input and output port diagram of a multi-coupling network switching device according to an embodiment of the present disclosure;

[0020] Figure 4 The control button diagram of the multi-coupling network switching device according to the embodiment of the present disclosure is schematically shown.

[0021] [Description of Reference Numerals]

[0022] 1-combination wave generator; 2-first coupling network; 3-second coupling network; 4-first coupling sub-network; 5-first switching switch group; 6-second coupling sub-network; 7-third coupling sub-network; 8-second switching switch group; 9-fourth coupling sub-network; 10-third switching switch group; 11-test equipment; A-interlocking structure. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0024] It should be noted that in the drawings or descriptions, similar or identical parts use the same figure numbers. The technical features in the various embodiments exemplified in the specification can be freely combined to form a new solution without conflict. In addition, each claim can be used as an embodiment alone or the technical features in each claim can be combined as a new embodiment. In the drawings, the shape or thickness of the embodiment can be expanded and simplified or conveniently indicated. Furthermore, the elements or implementations not shown or described in the drawings are in a form known to a person of ordinary skill in the art. In addition, although demonstrations of parameters containing specific values ​​may be provided herein, it should be understood that the parameters do not need to be exactly equal to the corresponding values, but can be approximated to the corresponding values ​​within an acceptable error tolerance or design constraint.

[0025] Unless there are technical obstacles or contradictions, the above-mentioned various embodiments of the present disclosure can be freely combined to form additional embodiments, and these additional embodiments are all within the protection scope of the present disclosure.

[0026] Although the present disclosure is described in conjunction with the accompanying drawings, the embodiments disclosed in the accompanying drawings are intended to exemplify the preferred embodiments of the present disclosure and should not be construed as limiting the present disclosure. The dimensional ratios in the accompanying drawings are merely illustrative and should not be construed as limiting the present disclosure.

[0027] Although some embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept, the scope of which is defined by the claims and their equivalents.

[0028] Figure 1 The network structure diagram of the multi-coupling network switching device according to the embodiment of the present disclosure is schematically shown.

[0029] According to the embodiments of the present disclosure, Figure 1As shown, the present disclosure provides a multi-coupling network switching device including: a combination wave generator 1 for transmitting a surge interference signal or an electrical fast transient pulse group interference signal. A first coupling network 2, including a first coupling subnetwork 4, a second coupling subnetwork 6 and a first switching switch group 5, the first coupling subnetwork 4 is used to convert the surge interference signal into a first interference signal and couple it to the power port of the device under test 11, and the first interference signal is used to apply surge differential mode interference to the device under test 11. The second coupling subnetwork 6 is used to convert the surge interference signal into a second interference signal and couple it to the power port, and the second interference signal is used to apply surge common mode interference to the device under test 11. The first switching switch group 5 is used to control the surge interference signal to flow to the first coupling subnetwork 4 or the second coupling subnetwork 6. The second coupling network 3, including a third coupling subnetwork 7, a fourth coupling subnetwork 9 and a second switching switch group 8, the third coupling subnetwork 7 is used to convert the electrical fast transient pulse group interference signal into a third interference signal and couple it to the power port, and the third interference signal is used to apply electrical fast transient pulse group single-line interference to the device under test 11. The fourth coupling sub-network 9 is used to convert the EFT pulse group interference signal into a fourth interference signal and couple it to the power port. The fourth interference signal is used to apply EFT pulse group multi-line interference to the device under test 11. The second switching switch group 8 is used to control the EFT pulse group interference signal to flow to the third coupling sub-network 7 or the fourth coupling sub-network 9. The third switching switch group 10 is connected to the first coupling network 2 and the second coupling network 3, respectively, and is used to realize the switching between the first coupling network 2 and the second coupling network 3.

[0030] In some embodiments, for example, the combination wave generator 1 can transmit a surge interference signal to the first coupling network 2. After receiving the surge interference signal, the first coupling network 2 outputs the surge interference signal to the first coupling sub-network 4 or the second coupling sub-network 6 according to the on-off state of the first switching switch group 5 at this time. The first coupling sub-network 4 and the second coupling sub-network 6 are respectively used to convert the surge interference signal into a first interference signal and a second interference signal, and couple them to the power port of the device under test 11.

[0031] At the same time, the combination wave generator 1 can also emit an EFT pulse group interference signal to the second coupling network 3. After receiving the EFT pulse group interference signal, the second coupling network 3 outputs the EFT pulse group interference signal to the third coupling sub-network 7 or the fourth coupling sub-network 9 according to the on-off state of the second switching switch group 8 at this time. The third coupling sub-network 7 and the fourth coupling sub-network 9 are respectively used to convert the EFT pulse group interference signal into the third interference signal and the fourth interference signal, and couple them to the power port of the device under test 11.

[0032] For example, the first coupling sub-network 4, the second coupling sub-network 6, the third coupling sub-network 7 and the fourth coupling sub-network 9 can be connected to the device under test 11 through the third switching switch group 10. When the third switching switch group 10 connects the first coupling sub-network 4 or the second coupling sub-network 6 to the device under test 11, the device is switched to the first coupling network 2. When the third switching switch group 10 connects the third coupling sub-network 7 or the fourth coupling sub-network 9 to the device under test 11, the device is switched to the second coupling network 3.

[0033] Through the embodiments of the present disclosure, the injection requirements of different interference signals in the electrical fast transient pulse group immunity test and the surge (impact) immunity test can be met at the same time, so that when the above two tests are performed on the test equipment 11, there is no need to replace different test devices to complete them, which greatly reduces the difficulty of arranging the above two tests.

[0034] Figure 2 The circuit diagram of the multi-coupling network switching device according to an embodiment of the present disclosure is schematically shown.

[0035] According to the embodiments of the present disclosure, Figure 2 As shown, the first coupling sub-network 4 is partially connected in parallel with the second coupling sub-network 6, the first switching switch group 5 includes a first switch S9 and a second switch S10, there are multiple power supply ports, and the first coupling sub-network 4 includes: a first capacitor C1, which is arranged between the combination wave generator 1 and the first switch S9. The second coupling sub-network 6 includes: a first resistor R1, which is connected to the combination wave generator 1. The second capacitor C2 is arranged between the first resistor R1 and the second switch S10. The multi-coupling network switching device also includes: a first multi-way switch H, the first end of the first multi-way switch H is respectively connected to the first switch S9 and the second switch S10, and the second end of the first multi-way switch H is respectively connected to one of the multiple power supply ports.

[0036] In some embodiments, for example, when the first switch S9 is closed and the second switch S10 is open, after the combination wave generator 1 sends out a surge interference signal, the surge interference signal first flows into the 18μF first capacitor C1. At this time, the surge interference signal is converted into a first interference signal through the pressure of the 18μF first capacitor C1, and the first interference signal then flows to the first multi-way switch H, and the output end of the first multi-way switch H is connected to one of the multiple power ports, so as to couple the first interference signal to any one of the power ports. After the first interference signal enters the device under test 11 through a certain power port, it will return to the combination wave generator 1 from another power port to form a complete first coupling sub-network 4. Among them, the multiple power ports include, for example, three phase line ports L1-L3 and one neutral line port N.

[0037] For example, when the second switch S10 is closed and the first switch S9 is open, after the combination wave generator 1 sends out a surge interference signal, the surge interference signal first flows into the first resistor R1 of 10Ω and the second capacitor C2 of 9μF. At this time, the surge interference signal is converted into a second interference signal through the pressure of the first resistor R1 of 10Ω and the second capacitor C2 of 9μF, and the second interference signal then flows to the first multi-way switch H, and the output end of the first multi-way switch H is connected to one of the multiple power ports, which is used to couple the second interference signal to any power port. After the second interference signal enters the test device 11 through a certain power port, it will return to the combination wave generator 1 from another power port to form a complete second coupling sub-network 6. Among them, the multiple power ports include, for example, three phase line ports L1-L3, a neutral line port N and a ground line port PE.

[0038] Through the embodiments of the present disclosure, the current coupling network can be switched to the first coupling sub-network 4 or the second coupling sub-network 6 by turning on and off the first and second switches, which not only meets the injection requirements of different interference signals in the surge (impact) immunity test, but also improves the flexibility of the injection operation of different interference signals in the surge (impact) immunity test.

[0039] According to the embodiments of the present disclosure, Figure 2 As shown, the first switching switch group 5 further includes: a third switch S11 connected to the combination wave generator 1. The first coupling sub-network 4 further includes: a second multi-way switch L, a first end of the second multi-way switch L is connected to the third switch S11, and a second end of the second multi-way switch L is respectively connected to one of the multiple power ports.

[0040] After the first interference signal is injected into the device under test 11 through the power port, it needs to be returned from another power port to the combination wave generator 1 to form a complete first coupling sub-network 4 .

[0041] In some embodiments, for example, in the process of the first interference signal returning to the combination wave generator 1 , a second multi-way switch L is added to select the power port on the device under test 11 through which the first interference signal is output.

[0042] For example, the combination wave generator 1 sends a surge interference signal to the first capacitor C1 of 18μF, and the first capacitor C1 of 18μF converts the surge interference signal into a first interference signal, and couples it to the phase line port L1 of the device under test 11 through the first multi-way switch H. At this time, the third switch S11 is closed, one end of the second multi-way switch L is connected to the third switch S11, and the other end is connected to the phase line port L2 of the device under test 11, and the first interference signal is input into the device under test 11 from the phase line port L1, and then returns to the combination wave generator 1 from the phase line port L2, forming a first coupling sub-network 4 for injecting interference into the phase line ports L1 and L2 of the device under test 11.

[0043] For another example, the combination wave generator 1 sends a surge interference signal to the first capacitor C1 of 18μF, and the first capacitor C1 of 18μF converts the surge interference signal into a first interference signal, and couples it to the phase line port L3 of the device under test 11 through the first multi-way switch H. At this time, the third switch S11 is closed, one end of the second multi-way switch L is connected to the third switch S11, and the other end is connected to the neutral line port N of the device under test 11. The first interference signal is input into the device under test 11 from the phase line port L3, and then returns to the combination wave generator 1 from the neutral line port N, forming a first coupling sub-network 4 for injecting interference into the phase line port L3 and the neutral line port N of the device under test 11.

[0044] Through the embodiments of the present disclosure, the control of the power port outputted by the first interference signal on the device under test 11 is realized, and in actual tests, the second multi-way switch L can be used to perform surge (impact) immunity tests on different power ports.

[0045] According to the embodiments of the present disclosure, Figure 2 As shown, the first multi-way switch H and the second multi-way switch L have the same number of lines, and the lines connected to the same power port are interlocked.

[0046] In some embodiments, for example, the first multi-way switch H has four interfaces: a first interface S1, a second interface S2, a third interface S4, and a fourth interface S4. The second multi-way switch L also has four interfaces: a fifth interface S5, a sixth interface S6, a seventh interface S7, and an eighth interface S8. Among them, the first interface S1 and the fifth interface S5 are simultaneously connected to the phase line port L1. The second interface S2 and the sixth interface S6 are simultaneously connected to the phase line port L2. The third interface S3 and the seventh interface S7 are simultaneously connected to the phase line port L3. The fourth interface S4 and the eighth interface S8 are simultaneously connected to the neutral line port N.

[0047] Wherein, the first multi-way switch H and the second multi-way switch L have an interlocking structure A. That is, the first interface S1 is interlocked with the second interface S2, the third interface S3, the fourth interface S4 and the fifth interface S5. The second interface S2 is interlocked with the first interface S1, the third interface S3, the fourth interface S4 and the sixth interface S6. The third interface S3 is interlocked with the first interface S1, the second interface S2, the fourth interface S4 and the seventh interface S7. The fourth interface S4 is interlocked with the first interface S1, the second interface S2, the third interface S3 and the eighth interface S8. The fifth interface S5 is interlocked with the first interface S1, the sixth interface S6, the seventh interface S7 and the eighth interface S8. The sixth interface S6 is interlocked with the second interface S2, the fifth interface S5, the seventh interface S7 and the eighth interface S8. The seventh interface S7 is interlocked with the third interface S3, the fifth interface S5, the sixth interface S6 and the eighth interface S8. The eighth interface S8 is interlocked with the fourth interface S4, the fifth interface S5, the sixth interface S6 and the seventh interface S7. Interlocking means that when an interface is closed, the other interfaces interlocked with the interface remain disconnected.

[0048] Through the embodiments of the present disclosure, the first multi-way switch H and the second multi-way switch L with the same number of paths are used and interlocked, thereby avoiding the short-circuit risk caused by the input and output ports of the first interference signal on the test device 11 being at the same port, thereby ensuring the personal safety of the test personnel and the safety of the test device 11.

[0049] According to the embodiments of the present disclosure, Figure 2 As shown, the power port includes a ground port PE, the first switch group 5 also includes a fourth switch S12, the first end of the fourth switch S12 is connected to the combination wave generator 1, and the second end of the fourth switch S12 is connected to the ground port PE. The first switch S9 and the third switch S11 are turned on and off at the same time, and the second switch S10 and the fourth switch S12 are turned on and off at the same time. When the first switch S9 is closed, the first coupling network 2 is characterized as a surge differential mode coupling network, and when the second switch S10 is closed, the first coupling network 2 is characterized as a surge common mode coupling network.

[0050] After the second interference signal is injected into the device under test 11 through the power port, it needs to be returned from the ground port to the combination wave generator 1 to form a complete second coupling sub-network 6.

[0051] In some embodiments, for example, a fourth switch S12 may be added to control the connection between the combination wave generator 1 and the ground port PE during the process of the second interference signal returning to the combination wave generator 1. After the connection, a complete second coupling sub-network 6 may be formed, and the surge interference signal may be injected into the ground port PE and one of the phase port L1-L3 and the neutral port N through the first resistor R1 of 10Ω and the second capacitor C2 of 9μF to achieve surge common-mode coupling.

[0052] The first coupling sub-network 4 and the second coupling sub-network 6 can be switched by the four switches of the first switching switch group 5. However, in actual operation, the operator is likely to switch on switches that should not be switched on at the same time, thereby causing a short circuit in the equipment and causing danger. Therefore, it is necessary to limit the on and off conditions of the switches in the first switching switch group 5.

[0053] In some embodiments, for example, the first switch S9 and the third switch S11 are turned on and off at the same time, and the second switch S10 and the fourth switch S12 are turned on and off at the same time.

[0054] When the first switch S9 is closed, the third switch S11 also remains closed, and the surge interference signal flows to the first capacitor C1. At this time, the first coupling network 2 is characterized as a first coupling sub-network 4, and the first coupling sub-network 4 is used to apply surge differential mode interference to the test device 11, that is, the first coupling network 2 at this time is characterized as a surge differential mode coupling network.

[0055] Similarly, when the second switch S10 is closed, the fourth switch S4 also remains closed, and the surge interference signal flows to the first resistor R1 and the second capacitor C2. At this time, the first coupling network 2 is characterized as the second coupling sub-network 6, and the second coupling sub-network 6 is used to apply surge common-mode interference to the test device 11, that is, the first coupling network 2 at this time is characterized as a surge common-mode coupling network.

[0056] It is easy to understand that the first coupling network 2 can only represent one coupling network at the same time, so the first switch S9 and the second switch S10 cannot be closed at the same time.

[0057] Through the embodiments of the present disclosure, the on-off conditions of the switches in the first switching switch group 5 are restricted, making the test operation safer. At the same time, the on-off of the first switch S9 and the second switch S10 can be controlled to switch the current coupling network to a surge differential mode coupling network or a surge common mode coupling network, thereby improving the convenience of switching different surge coupling networks in the surge (impact) immunity test.

[0058] According to the embodiments of the present disclosure, Figure 2 As shown, the second switching switch group 8 includes a fifth switch S13, a plurality of power ports, and the third coupling sub-network 7 includes: a third capacitor C3 connected to the fifth switch S13. A third multi-way switch D, a first end of the third multi-way switch D is connected to the third capacitor C3, and a second end of the third multi-way switch D is respectively connected to one of the plurality of power ports. When the fifth switch S13 is closed, the second coupling network 3 is characterized as an electrical fast transient pulse group single-line coupling network.

[0059] In some embodiments, for example, when the fifth switch S13 is closed, after the combination wave generator 1 emits an EFT pulse group interference signal, the EFT pulse group interference signal first flows into the 33nF third capacitor C3 through the fifth switch S13. At this time, the surge interference signal is converted into a third interference signal by the pressure of the 33nF third capacitor C3, and the third interference signal then flows to the third multi-way switch D, and the output end of the third multi-way switch D is connected to the phase line port L1-L3, the neutral line port N and the ground line port PE, for coupling the third interference signal to any power supply port. Among them, the third multi-way switch D is connected to the ground line port and is connected to the fourth switch S12 in the second coupling sub-network 6. The third interference signal enters the device under test 11 through a certain power supply port to form a complete third coupling sub-network 7.

[0060] When the fifth switch S13 is closed, the EFT pulse group interference signal flows to the third capacitor C3. At this time, the second coupling network 3 is characterized as the third coupling sub-network 7, and the third coupling sub-network 7 is used to apply the EFT pulse group single-line interference to the test device 11. That is, the second coupling network 3 at this time is characterized as the EFT pulse group single-line coupling network.

[0061] Through the embodiments of the present disclosure, the third multi-way switch D can meet the requirements of injecting interference signals into different power ports in the electrical fast transient pulse group immunity test, thereby improving the flexibility of the interference signal injection operation in the electrical fast transient pulse group immunity test.

[0062] According to the embodiments of the present disclosure, Figure 2 As shown, the second switching switch group 8 also includes: a sixth switch S14, connected to the combination wave generator 1. The fourth coupling sub-network 9 includes: a plurality of fourth capacitors C4, the first ends of the plurality of fourth capacitors C4 are respectively connected to the sixth switch S14, the second ends of the plurality of fourth capacitors C4 are respectively connected to one of the plurality of power ports, and the number of the fourth capacitors C4 is the same as the number of the power ports. Wherein, when the sixth switch S14 is closed, the second coupling network 3 is characterized as an electrical fast transient pulse group multi-line coupling network.

[0063] In some embodiments, for example, when the sixth switch S14 is closed, after the combination wave generator 1 emits an EFT pulse group interference signal, the EFT pulse group interference signal first flows into five 33nF fourth capacitors C4 respectively. At this time, the EFT pulse group interference signal is converted into five fourth interference signals through the pressure of the five 33nF fourth capacitors C4, and the fourth interference signal then flows to the phase line ports L1-L3, the neutral line port N and the ground line port PE. After the fourth interference signal enters the test device 11 through the five power ports, a complete fourth coupling sub-network 9 is formed. At this time, the fourth coupling sub-network 9 simultaneously applies full-line interference to the phase line ports L1-L3, the neutral line port N and the ground line port PE of the test device 11 through the five 33nF fourth capacitors C4.

[0064] When the sixth switch S14 is closed, the EFT pulse group interference signal flows to the plurality of fourth capacitors C4. At this time, the second coupling network 3 is characterized as a fourth coupling sub-network 9, and the fourth coupling sub-network 9 is used to apply the EFT pulse group full-line interference to the device under test 11. That is, the second coupling network 3 at this time represents an EFT pulse group multi-line coupling network.

[0065] It is easy to understand that the second coupling network 3 can only represent one coupling network at the same time, so the fifth switch S13 and the sixth switch S14 cannot be closed at the same time.

[0066] Through the embodiments of the present disclosure, the current coupling network can be switched to an EFT pulse group single-line coupling network or an EFT pulse group multi-line coupling network by controlling the on and off of the fifth switch 13 and the sixth switch S14, thereby improving the convenience of switching different EFT pulse group coupling networks in the EFT pulse group test.

[0067] According to the embodiments of the present disclosure, Figure 2 As shown, the second ends of the plurality of fourth capacitors C4 are respectively connected to one of the second ends of the third multi-way switch D, and the third switching switch group 10 is respectively connected to the second end of the first multi-way switch H and the second end of the third multi-way switch D to realize switching between the first coupling network 2 and the second coupling network 3.

[0068] In some embodiments, for example, the third switching switch group 10 has four interfaces, the first end of each interface is respectively connected to the second end of the first multi-way switch H and the second end of the second multi-way switch L or the second end of the third multi-way switch D, and the second end of each interface is respectively connected to the phase line port L1-L3 and the neutral line port N of the test device 11.

[0069] When the third switch group 10 is connected to the second end of the first multi-way switch H and the second end of the second multi-way switch L, the network switching device of the present disclosure switches to the first coupling network 2. When the third switch group 10 is connected to the second end of the third multi-way switch D, the network switching device of the present disclosure switches to the second coupling network 3.

[0070] Through the embodiments of the present disclosure, the current coupling network can be switched to the first coupling network 2 or the second coupling network 3 by using the third switching switch group 10, thereby improving the flexibility of different interference signal injection operations in electrical fast transient pulse group immunity and surge (impact) immunity tests.

[0071] Figure 3 The diagram schematically shows the input and output ports of a multi-coupling network switching device according to an embodiment of the present disclosure.

[0072] According to an embodiment of the present disclosure, the first interference signal, the second interference signal, the third interference signal and the fourth interference signal are output through multiple output ports, the multiple output ports correspond one-to-one to the multiple power ports respectively, and the output ports use banana bases.

[0073] In some embodiments, Figure 3 As shown, for example, the appearance of the network switching device disclosed in the present invention is an iron hexahedron box. There are 4 input ports, located on the left side of the hexahedron, which are: 2 surge input banana head sockets, 1 electrical fast transient pulse group BNC female base and 1 shell protection grounding banana head socket. There are 5 output ports, located on the right side of the hexahedron, and banana head sockets are used to connect the phase line ports L1-L3, the neutral line port N and the ground line port PE of the network power port of the device to be tested.

[0074] The H and C ports of the network switching device of the present disclosure are connected to the surge output terminal of the combination wave generator 1, and are used to receive the surge interference signal emitted by the combination wave generator 1. The PE port of the network switching device of the present disclosure is connected to the reference ground, and the EFT pulse group BNC terminal of the network switching device of the present disclosure is connected to the EFT pulse group BNC output terminal of the combination wave generator 1, and is used to receive the EFT pulse group interference signal emitted by the combination wave generator 1. The output ports L1, L2, L3, N, and PE are respectively connected to the phase line ports L1-L3, the neutral line port N, and the ground line port PE of the equipment under test 11.

[0075] The output port of the device disclosed in the present invention adopts a banana base, for example. When connecting the port of the network switching device disclosed in the present invention and the test device 11, a cable with an alligator clip can be used to connect the banana base of the output port of the network switching device disclosed in the present invention and the power port of the test device 11 accordingly, so that the input and output ports are respectively in two opposite directions.

[0076] Through the embodiments of the present disclosure, a banana base is used at the output port of the network switching device of the present disclosure, so that the connection with the test device 11 is more convenient and more conducive to the overall layout of the test.

[0077] According to an embodiment of the present disclosure, the rated current of the device under test 11 is greater than 200A.

[0078] For low-power (rated current less than 200A) test equipment 11, a coupling-decoupling integrated network is used for the electrical fast transient pulse group immunity and surge (impact) immunity tests. However, for high-power (rated current greater than 200A) active equipment, which has a complex composition and large size, it is impossible to use a coupling-decoupling integrated network when conducting electrical fast transient pulse group immunity and surge (impact) immunity tests. The coupling and decoupling operations need to be separated, that is, the electrical fast transient pulse group immunity and surge (impact) immunity tests for high-power active equipment (rated current greater than 200A) need to design coupling networks and decoupling networks separately.

[0079] In some embodiments, for example, the network switching device of the present disclosure provides a multi-coupled network switching device that can meet the requirements of performing electrical fast transient pulse group immunity and surge (impact) immunity tests on the equipment under test 11 with a rated current greater than 200 A. The multi-coupled network switching device used in the present disclosure can conveniently and efficiently complete the application of interference signals, ensuring the implementation of electrical fast transient pulse group immunity and surge (impact) immunity tests.

[0080] The embodiments of the present disclosure provide a more flexible test method for electrical fast transient pulse group immunity and surge (impact) immunity tests for high-power active equipment (rated current greater than 200A).

[0081] Figure 4 The control button diagram of the multi-coupling network switching device according to the embodiment of the present disclosure is schematically shown.

[0082] In some embodiments, Figure 4 As shown, the button control area of ​​the network switching device of the present disclosure is composed of 12 button switches and a selection switch, which are used for switching the coupling network and selecting the coupling path. The switch of the network switching device of the present disclosure can be controlled by buttons S1-S12 and the selection switch.

[0083] For example, the interfaces connected to the first multi-way switch H and the second multi-way switch L can be controlled by buttons S1-S8 to select different coupling paths. When buttons S1 and S6 are pressed, the first multi-way switch H is connected to the first interface S1, and the second multi-way switch L is connected to the sixth interface S6. When buttons S3 and S5 are pressed, the first multi-way switch H is connected to the third interface S3, and the second multi-way switch L is connected to the fifth interface S5. Through this interlocking switch, the surge interference signal can be applied to the device under test 11 through the first capacitor C1 of 18μF.

[0084] For example, the first switching switch group 5 can be controlled by the button S9 to switch the first coupling sub-network 4 and the second coupling sub-network 6, which are interlocked and cannot be effective at the same time. When no button is pressed, the first switch S9 and the third switch S11 are closed at the same time, and the second switch S10 and the fourth switch S12 are opened at the same time. At this time, the internal coupling network of the network switching device of the present disclosure is the first coupling sub-network 4. When the button S9 is pressed, the first switch S9 and the third switch S11 are opened at the same time, and the second switch S10 and the fourth switch S12 are closed at the same time. At this time, the internal coupling network of the network switching device of the present disclosure is switched to the second coupling sub-network 6.

[0085] For example, the on and off of the second switching switch group 8 can be controlled by the button S12 to switch the third coupling sub-network 7 and the fourth coupling sub-network 9, which are interlocked and cannot be effective at the same time. When no button is pressed, the fifth switch S13 is closed and the sixth switch S14 is opened. At this time, the internal coupling network of the network switching device of the present disclosure is the third coupling sub-network 7. When the button S12 is pressed, the fifth switch S13 is opened and the sixth switch S14 is closed. At this time, the internal coupling network of the network device of the present disclosure is the fourth coupling sub-network 9.

[0086] For example, the connection of the third switching switch group 10 can be controlled by buttons S10 and S11 to switch the first coupling network 2 and the second coupling network 3, which are interlocked and cannot be effective at the same time. When no button is pressed, the four interfaces of the third switching switch group 10 are connected to the second end of the first multi-way switch H, and the internal coupling network of the network device of the present disclosure is the first coupling network 2. When buttons S10 and S11 are pressed at the same time, the four interfaces of the third switching switch group 10 are connected to the second end of the third multi-way switch D, and the internal coupling network of the network switching device of the present disclosure is switched to the second coupling network 3.

[0087] In addition, the interface connected to the third multi-way switch D can be controlled by a selection switch to select different coupling paths.

[0088] For example, the selection switch can be pressed to connect the second end of the third multi-way switch D with the phase line port L1. If the fifth switch S13 is closed, the network device of the present disclosure can apply an EFT pulse group single-line interference to the phase line port L1.

[0089] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims present the elements of the various steps in an exemplary order and are not intended to be limited to a specific order or hierarchy.

[0090] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only reference directions of the drawings and are not intended to limit the scope of protection of the present disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or configurations will be omitted when they may cause confusion in the understanding of the present disclosure. In addition, the shapes, sizes, and positional relationships of the components in the drawings do not reflect the actual sizes, proportions, and actual positional relationships.

[0091] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the attached claims, the disclosure is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the attached claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the disclosure.

[0092] In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. With respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", as explained in terms of "including," used as a transitional word in the claims. Any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

[0093] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present disclosure. It should be understood that the above description is only a specific embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A multi-coupling network switching device, connected to a device under test, for applying an interference signal to the device under test, characterized in that: include: Combination wave generator, used to transmit surge interference signal or electrical fast transient pulse group interference signal; A first coupling network, comprising a first coupling sub-network, a second coupling sub-network and a first switching switch group, wherein the first coupling sub-network is used to convert the surge interference signal into a first interference signal and couple it to the power port of the device under test, and the first interference signal is used to apply surge differential mode interference to the device under test; The second coupling sub-network is used to convert the surge interference signal into a second interference signal and couple it to the power port, and the second interference signal is used to apply surge common-mode interference to the device under test; The first switching switch group is used to control the surge interference signal to flow to the first coupling sub-network or the second coupling sub-network; A second coupling network includes a third coupling sub-network, a fourth coupling sub-network and a second switching switch group, wherein the third coupling sub-network is used to convert the electrical fast transient pulse group interference signal into a third interference signal and couple it to the power port, and the third interference signal is used to apply an electrical fast transient pulse group single-line interference to the device under test; The fourth coupling subnetwork is used to convert the electrical fast transient pulse group interference signal into a fourth interference signal and couple it to the power port, and the fourth interference signal is used to apply electrical fast transient pulse group multi-line interference to the device under test; The second switch group is used to control the electrical fast transient pulse group interference signal to flow to the third coupling sub-network or the fourth coupling sub-network; The third switching switch group is connected to the first coupling network and the second coupling network respectively, and is used to realize switching between the first coupling network and the second coupling network.

2. The device according to claim 1, characterized in that The first coupling sub-network is partially connected in parallel with the second coupling sub-network, the first switching switch group includes a first switch and a second switch, there are multiple power ports, and the first coupling sub-network includes: A first capacitor is disposed between the combination wave generator and the first switch; The second coupling sub-network comprises: A first resistor connected to the combination wave generator; A second capacitor is arranged between the first resistor and the second switch; The multi-coupling network switching device also includes: A first multi-way switch, wherein a first end of the first multi-way switch is respectively connected to the first switch and the second switch, and a second end of the first multi-way switch is respectively connected to one of the plurality of power ports.

3. The device according to claim 2, characterized in that The first switch group further includes: a third switch connected to the combination wave generator; The first coupling sub-network further includes: A second multi-way switch, wherein a first end of the second multi-way switch is connected to the third switch, and a second end of the second multi-way switch is respectively connected to one of the plurality of power ports.

4. The device according to claim 3, characterized in that The first multi-way switch and the second multi-way switch have the same number of ways, and the lines connected to the same power port are interlocked.

5. The device according to claim 3, characterized in that The power port includes a ground port, the first switch group also includes a fourth switch, a first end of the fourth switch is connected to the combination wave generator, and a second end of the fourth switch is connected to the ground port; The first switch and the third switch are turned on and off simultaneously, and the second switch and the fourth switch are turned on and off simultaneously; When the first switch is closed, the first coupling network is characterized as a surge differential mode coupling network, and when the second switch is closed, the first coupling network is characterized as a surge common mode coupling network.

6. The device according to claim 4, characterized in that The second switch group includes a fifth switch, the power supply port is multiple, and the third coupling sub-network includes: a third capacitor connected to the fifth switch; a third multi-way switch, wherein a first end of the third multi-way switch is connected to the third capacitor, and a second end of the third multi-way switch is respectively connected to one of the plurality of power ports; Wherein, when the fifth switch is closed, the second coupling network is characterized as an electrical fast transient pulse group single-line coupling network.

7. The device according to claim 6, characterized in that The second switch group further includes: a sixth switch connected to the combination wave generator; The fourth coupling sub-network comprises: a plurality of fourth capacitors, wherein first ends of the plurality of fourth capacitors are respectively connected to the sixth switch, second ends of the plurality of fourth capacitors are respectively connected to one of the plurality of power ports, and the number of the fourth capacitors is the same as the number of the power ports; Wherein, when the sixth switch is closed, the second coupling network is characterized as an electrical fast transient pulse group full-line coupling network.

8. The device according to claim 7, characterized in that The second ends of the multiple fourth capacitors are respectively connected to one of the second ends of the third multi-way switch, and the third switching switch group is respectively connected to the second end of the first multi-way switch and the second end of the third multi-way switch to achieve switching between the first coupling network and the second coupling network.

9. The device according to claim 2, characterized in that The first interference signal, the second interference signal, the third interference signal and the fourth interference signal are output through a plurality of output ports, the plurality of output ports correspond one-to-one to the plurality of power ports respectively, and the output ports adopt banana sockets.

10. The device according to claim 1, characterized in that The rated current of the equipment under test is greater than 200A.

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