Lightning surge equipment

Abstract

The embodiment of the utility model provides lightning surge equipment, and relates to the technical field of electronic testing. The device comprises: a power supply device; the coupling and decoupling network is electrically connected with the power supply equipment and is used for transmitting electricity of the power supply equipment to tested equipment; the resonance damage circuit is located on a connection path between the power supply equipment and the coupling and decoupling network and used for damaging resonance of the connection path; wherein the resonance destruction circuit comprises an inductor and a capacitor which are connected in parallel. According to the embodiment of the invention, the problem that the tested equipment cannot work normally due to resonance can be effectively solved, and the flexibility and accuracy of the lightning surge test are improved at the same time.

Description

Technical Field

[0001] This application relates to the field of electronic testing technology, and in particular to a lightning surge device. Background Technology

[0002] Electronic equipment is frequently threatened by various unforeseen circumstances during operation, with surges being particularly prominent. A surge is a rapid fluctuation in voltage or current within a short period of time, and its causes are diverse, including equipment switching operations, electrostatic discharge, circuit faults, and lightning strikes. Among these factors, surges caused by lightning strikes are the most destructive to electronic equipment, earning them the title of "invisible killers."

[0003] Currently, lightning surge testers are widely used in the immunity testing of household appliances, industrial equipment, and automotive electronic products to simulate lightning surge waveforms and verify the interference immunity of the device under test (DUT). Existing lightning surge testers typically transmit power from the power supply to the DUT through a coupling-decoupling network (CDN). However, when the power supply is a DC power source, the decoupling capacitors and inductors in the CDN may have frequencies close to the inherent resonant frequencies of either the power supply or the DUT, leading to resonance. This can cause the power supply to fail to provide effective power, preventing the DUT from starting up properly. Consequently, the lightning surge tester cannot properly test DC products, affecting the accuracy and reliability of the test results. Utility Model Content

[0004] The purpose of this invention is to provide a lightning surge device that effectively solves the problem of the tested device failing to work properly due to resonance by adding a resonance destruction circuit between the power supply equipment and the coupling / decoupling network, while improving the flexibility and accuracy of lightning surge testing.

[0005] To achieve the above objectives, a first aspect of this application provides a lightning surge device, the lightning surge device comprising:

[0006] The system includes a power supply, a coupling / decoupling network, and a resonant disruption circuit; wherein the resonant disruption circuit comprises inductors and capacitors connected in parallel.

[0007] The coupling-decoupling network is electrically connected to the power supply equipment and is used to transmit electricity from the power supply equipment to the device under test.

[0008] The resonance disruption circuit is located in the connection path between the power supply equipment and the coupling / decoupling network, and is used to disrupt the resonance of the connection path;

[0009] In some embodiments, the capacitor is replaced by a varactor diode.

[0010] In some embodiments, the resonance disruption circuit includes at least two switches connected in parallel, each switch being connected to an inductor-capacitor group, the inductor-capacitor group including inductors and capacitors connected in parallel, and different inductor-capacitor groups having different resonant frequency points.

[0011] In some embodiments, the number of switches is four.

[0012] In some embodiments, the resonant disruption circuit further includes a varactor diode;

[0013] The varactor diode is connected in series with the capacitor. By adjusting the reverse bias voltage of the varactor diode, the capacitance of the varactor diode is changed, thereby disrupting the resonance of the connection path.

[0014] In some embodiments, the resonant disruption circuit further includes a series-connected adjustment signal source and a resistor, with the resistor electrically connected between the varactor diode and the capacitor.

[0015] In some embodiments, the coupling-decoupling network electrically connects the endpoints of the power supply device to a first endpoint and a second endpoint; the resonant disruption circuit further includes a filter capacitor, one end of which is electrically connected to the first endpoint and the other end of which is electrically connected to the second endpoint.

[0016] In some embodiments, a resonance detection unit is also included for determining the resonant frequency point of the connection path.

[0017] In some embodiments, the resonance detection unit includes: a signal generating device, a signal receiving device, and a host computer. The signal generating device is used to emit signals of different frequencies, the signal receiving device is used to receive and measure voltage signals in the circuit, and the host computer is used to control the signal generating device and process the data acquired by the signal receiving device to obtain the resonance frequency point.

[0018] The lightning surge device proposed in this application includes a newly added resonance destruction circuit, which specifically includes an inductor and a capacitor. This circuit can effectively solve the power supply problem caused by resonance between the power supply equipment, the coupling and decoupling network and the device under test when powered by DC, ensuring the normal operation of the device under test and thus guaranteeing the accuracy and reliability of the test results.

[0019] In some optional embodiments, the design of multiplexers, inductor-capacitor groups, and varactor diodes allows for flexible adaptation to different combinations of power supply equipment, coupling / decoupling networks, and devices under test, thus accommodating various testing scenarios. Simultaneously, a resonance detection unit is used to quickly determine the resonant frequency point, providing a basis for adjusting circuits that may cause resonance damage; this method is simple to operate and saves time and costs. Furthermore, the design of filter capacitors effectively filters out noise in the output signal, ensuring the accuracy of the test results. Attached Figure Description

[0020] Figure 1 This is a block diagram of the lightning surge device provided in the embodiments of this application;

[0021] Figure 2 This is a module block diagram of a lightning surge device provided in another embodiment of this application;

[0022] Figure 3 This is a module block diagram of a lightning surge device provided in another embodiment of this application;

[0023] Figure 4 This is a module block diagram of a lightning surge device provided in another embodiment of this application;

[0024] Figure 5 This is a module block diagram of a lightning surge device provided in another embodiment of this application;

[0025] Figure reference numerals: 100, lightning surge device; 110, power supply equipment; 120, coupling / decoupling network; 130, resonance destruction circuit; 140, resonance detection unit; 141, host computer; 142, signal generating device; 143, signal receiving device; 200, device under test. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0027] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0029] First, let's analyze some of the terms used in this application:

[0030] Lightning surge: refers to a rapid fluctuation in voltage and current caused by a lightning strike. The electromagnetic pulse generated by a lightning strike can propagate through various pathways, such as power lines, signal lines, and antennas, damaging electronic equipment. Lightning surges have extremely high voltage and current amplitudes and extremely short durations, typically on the order of microseconds. These high-energy pulses can cause irreversible damage to sensitive components inside electronic equipment (such as integrated circuits and semiconductor devices).

[0031] Lightning surge equipment: Primarily used to simulate lightning surge environments and test the immunity performance of electronic equipment under lightning surge conditions. This test allows for the evaluation of the stability and reliability of electronic equipment when encountering lightning surges in real-world use.

[0032] Coupling and Decoupling Network (CDN): A key component in circuit design used to achieve signal transmission and interference isolation. It transmits the required signal by effectively connecting the signal source and the load, while using decoupling capacitors and other components to bypass high-frequency noise or interference signals on the power line to ground, thereby preventing these unnecessary signals from entering other parts of the circuit, ensuring stable circuit operation and signal purity, and achieving tight coupling on the signal path and effective decoupling on the interference path.

[0033] The lightning surge device provided in this application is specifically described through the following embodiments. First, the lightning surge device in this application is described.

[0034] To better describe the lightning surge device provided in the embodiments of this application, in this embodiment, refer to Figure 1 The diagram shown is a module block diagram of a lightning surge device provided in an embodiment of this application. Figure 1 As shown, the lightning surge protection device 100 includes a power supply device 110, a coupling / decoupling network 120, and a resonance disruption circuit 130. The coupling / decoupling network 120 is electrically connected to the power supply device 110, and the resonance disruption circuit 130 is located in the connection path between the power supply device 110 and the coupling / decoupling network 120. Furthermore, the resonance disruption circuit 130 includes an inductor L1 and a capacitor C1 connected in parallel. Through this structural design, when the power supply device 110 is a DC power source, the resonance disruption circuit 130 can effectively solve the problem of the tested device failing to start normally due to resonance, thereby ensuring the stability and reliability of the lightning surge protection device when testing DC products.

[0035] The beneficial effects of this application embodiment include, but are not limited to: during lightning surge testing, the power supply device 110 provides a stable power supply to the entire test system, ensuring the normal operation of the test process. The coupling-decoupling network 120 is responsible for transmitting the power signal provided by the power supply device 110 to the device under test 140, and in this process, realizes the signal coupling and decoupling functions. The function of the coupling-decoupling network 120 is not only to transmit signals, but also to isolate the electrical connection between the test device and the device under test, preventing interference signals that may occur during the test from affecting the test results. At the same time, the coupling-decoupling network 120 can also suppress interference signals propagating back from the device under test 140 to the test device, ensuring the accuracy and reliability of the test results. However, when the power supply device 110 is a DC power supply, due to the inductive and capacitive characteristics of the coupling-decoupling network 120, a resonance phenomenon may occur. The resonance phenomenon may cause the device under test 140 to fail to start normally, thereby affecting the test results. To solve this problem, this application embodiment sets a resonance destruction circuit 130 on the connection path between the power supply device 110 and the coupling-decoupling network 120. The resonance disruption circuit 130, through the parallel connection of inductor L1 and capacitor C1, can effectively disrupt the resonance phenomenon in the connection path during testing. This structural design is not only simple and practical but also low in cost, significantly improving the accuracy and reliability of lightning surge testing.

[0036] In some embodiments, the capacitor in the resonant disruption circuit can be replaced with a varactor diode. (See reference...) Figure 2 This is a module block diagram of a lightning surge device provided in another embodiment of this application. For example... Figure 2 As shown, the capacitor connected in parallel with the inductor L2 in the resonant disruption circuit 130 is replaced with a varactor diode VD1, wherein the positive terminal of the varactor diode VD1 is connected to the power supply device 110, and the negative terminal of the varactor diode VD1 is connected to the coupling decoupling network 120.

[0037] In some embodiments, the resonance disruption circuit includes at least two switches connected in parallel, each switch corresponding to an inductor-capacitor group, wherein the inductor-capacitor group includes inductors and capacitors connected in parallel, and different inductor-capacitor groups have different resonant frequency points. Specifically, refer to... Figure 3 Inductor L3 and capacitor C3 are connected in parallel to form an inductor-capacitor group, which is then connected in series with switch S1. Simultaneously, the various inductor-capacitor groups are connected in parallel. Different inductor-capacitor groups have different resonant frequencies, and the multiplexer allows for the selection of different inductor-capacitor groups connected to the circuit. Therefore, by switching different switches, different inductor-capacitor combinations are dynamically selected, causing the circuit's resonant frequency to deviate from the frequency of the external excitation signal, thus disrupting the resonance condition. This design provides greater flexibility, enabling the selection of appropriate inductor-capacitor combinations to disrupt resonance based on different test conditions and requirements.

[0038] In some embodiments, the number of multiplexers in the resonant disruption circuit is 4.

[0039] In some embodiments, the resonant disruption circuit further includes a diode. For example... Figure 3 As shown, the positive terminal of diode D1 is connected to the power supply device 110, and the negative terminal is connected to the parallel multiplexer. The parallel connection of diode D1 and the multiplexer provides additional protection when the resonant destructive circuit 130 switches between different inductor-capacitor groups, ensuring that the circuit is not damaged due to voltage surges or current reversals during the switching process, thereby improving the stability and service life of the resonant destructive circuit 130.

[0040] In some embodiments, the resonant disruption circuit includes a varactor diode. For example... Figure 4 As shown, the varactor diode VD2 is connected in series with capacitor C8, and the positive terminal of diode VD1 is connected to power supply device 110. By adjusting the reverse bias voltage of varactor diode VD2 to change its capacitance value, the resonant frequency of the resonant circuit can be flexibly adjusted, avoiding resonance problems caused by the similar inherent resonant frequencies between power supply device 110, coupling / decoupling network 120 and device under test 200, and ensuring that device under test can start and work normally during lightning surge testing.

[0041] based on Figure 4 The lightning surge device provided in another embodiment of this application will be further described below.

[0042] like Figure 4 As shown, the resonant disruption circuit 130 also includes a series-connected adjustment signal source V and a resistor R1. The resistor R1 is electrically connected between the varactor diode VD2 and the capacitor C8 to achieve precise control of the reverse bias voltage of the varactor diode VD2, thereby improving the stability and reliability of the circuit and ensuring stable signal transmission and safe operation of the equipment during lightning surge testing.

[0043] In some embodiments, the resonance disruption circuit further includes a filter capacitor. For example... Figure 4 Taking the resonance disruption circuit 130 as an example, the coupling-decoupling network 120 is electrically connected to the terminals of the power supply device 110, including the first terminal and the second terminal; one end of the filter capacitor C9 is electrically connected to the first terminal, and the other end is electrically connected to the second terminal. This effectively filters out high-frequency noise and spurious waves in the connection path, ensuring the purity of the output signal, and works in conjunction with the inductor L7, capacitor C8, and varactor diode VD2 in the resonance disruption circuit 130.

[0044] In some embodiments, the lightning surge device further includes a resonance detection unit. For example... Figure 5As shown, the resonance detection unit 140 is located on the connection path between the power supply device 110 and the coupling / decoupling network 120, and is used to determine the resonant frequency point of the connection path. This detection unit allows for real-time monitoring of the circuit's resonance state, providing accurate feedback information for the resonance-damping circuit. This design enables the resonance-damping circuit 130 to dynamically adjust its operating parameters based on the actual detected resonant frequency point, thereby more effectively disrupting the resonance phenomenon, ensuring the normal operation of the device under test and the stable transmission of test signals, and improving the accuracy and reliability of lightning surge testing.

[0045] based on Figure 5 The lightning surge device provided in another embodiment of this application will be further described below.

[0046] like Figure 5 As shown, the resonance detection unit 140 includes a host computer 141, a signal generator 142, and a signal receiver 143. The signal generator 142 and the signal receiver 143 are electrically connected to the host computer 141. One end of the signal generator 142 is electrically connected to a first terminal, and one end of the signal receiver 143 is electrically connected to a second terminal. The signal generator 142 emits signals of different frequencies, and the signal receiver 143 receives and measures the voltage signal in the circuit. The host computer controls the signal generator 142 and processes the data acquired by the signal receiver 143. More specifically, after acquiring the data, the host computer 141 performs calculations and plots the data to obtain a spectrum with frequency on the horizontal axis and amplitude on the vertical axis. The frequency corresponding to the location of the dip in the graph is recorded as the resonant frequency point. Based on this resonant frequency point, the resonant frequency is determined using the formula... By selecting a suitable inductor-capacitor group and using a switch to switch the inductor-capacitor group, the resonance phenomenon of the connection path can be disrupted to the greatest extent.

[0047] Meanwhile, the signal generating device 142 can use a signal source (such as a signal generator), and the signal receiving device 143 can use a programmable multimeter, voltmeter, oscilloscope, etc.

[0048] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0049] It should also be understood that the various implementation methods provided in this utility model embodiment can be combined arbitrarily to achieve different technical effects.

[0050] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0051] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0052] Those skilled in the art will understand that the functional modules / units in the systems and devices disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof.

[0053] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. The coupling or direct coupling or communication connection between the shown or discussed units may be through some interfaces, or indirect coupling or communication connection between the apparatus or units, and may be electrical, mechanical, or other forms.

[0054] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0055] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0056] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0057] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A lightning surge protection device, characterized in that, include: Power supply equipment; A coupling-decoupling network is electrically connected to the power supply equipment and is used to transmit electricity from the power supply equipment to the device under test. A resonance disruption circuit is located in the connection path between the power supply device and the coupling / decoupling network, and is used to disrupt the resonance of the connection path; The resonant disruption circuit includes inductors and capacitors connected in parallel.

2. The lightning surge protection device according to claim 1, characterized in that, The capacitor was replaced with a varactor diode.

3. The lightning surge protection device according to claim 1, characterized in that, The resonance disruption circuit includes at least two switches connected in parallel, each switch being connected to an inductor-capacitor group. The inductor-capacitor group includes inductors and capacitors connected in parallel, and different inductor-capacitor groups have different resonant frequency points.

4. The lightning surge protection device according to claim 3, characterized in that, The number of switches is 4.

5. The lightning surge protection device according to claim 3, characterized in that, The resonant disruption circuit also includes a diode, which is electrically connected to the at least two switches in parallel.

6. The lightning surge protection device according to claim 1, characterized in that, The resonant disruption circuit also includes a varactor diode; The varactor diode is connected in series with the capacitor. By adjusting the reverse bias voltage of the varactor diode, the capacitance of the varactor diode is changed, thereby disrupting the resonance of the connection path.

7. The lightning surge protection device according to claim 6, characterized in that, The resonance disruption circuit also includes a series-connected adjustment signal source and a resistor, with the resistor electrically connected between the varactor diode and the capacitor.

8. The lightning surge protection device according to any one of claims 1 to 7, characterized in that, The coupling-decoupling network electrically connects the endpoints of the power supply equipment to a first endpoint and a second endpoint; the resonant disruption circuit further includes a filter capacitor, one end of which is electrically connected to the first endpoint and the other end of which is electrically connected to the second endpoint.

9. The lightning surge device according to any one of claims 1 to 7, characterized in that, It also includes a resonance detection unit for determining the resonant frequency point of the connection path.

10. The lightning surge device according to claim 9, characterized in that, The resonance detection unit includes a signal generator, a signal receiver, and a host computer. The signal generator is used to emit signals of different frequencies, the signal receiver is used to receive and measure the voltage signals in the circuit, and the host computer is used to control the signal generator and process the data acquired by the signal receiver to obtain the resonance frequency point.

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