Arc generation device for arc discharge test
By introducing parameter acquisition module, servo driver, servo motor and screw transmission structure in the arc generation device, the precise control of the electrode movement distance and speed is achieved, and the problem of inaccurate electrode movement in the prior art is solved, satisfying UL 1699B Standard arc testing conditions improve detection efficiency and electrode service life.
Patent Information
- Application Number
- CN202420187007.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-25
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-01-25
AI Technical Summary
When detecting photovoltaic equipment, existing arc generators lack the ability to accurately control the electrode movement distance and speed, resulting in high labor consumption and easy damage to the electrodes, and the movement speed driven by the stepper motor is not suitable for different electrode spacing.
An arc-tearing test arc generation device including parameter acquisition module, servo drive, servo motor, screw transmission structure and electrode was designed. The screw transmission structure is driven by servo drive and servo motor to achieve accurate linear motion of the electrode to satisfy UL 1699B standard arc test conditions.
It realizes precise control of electrode movement distance and speed, meets the arc testing requirements of UL 1699B standard, reduces manpower consumption and reduces the risk of electrode damage.
Smart Images
Figure CN222321489U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of photovoltaic detection, and in particular to an arc generating device for an arc drawing test. Background Art
[0002] Photovoltaic equipment is a device that converts light energy into electrical energy, usually composed of solar panels, inverters and brackets. Generally, photovoltaic equipment is equipped with a DC arc detection device to detect arc faults in time and take corresponding safety measures.
[0003] When testing photovoltaic equipment, an arc generating device is required, and the arc generated at both ends of the electrode should be detected by the DC arc detection device in the photovoltaic equipment.
[0004] Most of the existing arc generating devices are still manually operated. This method is very labor-intensive and can easily damage the electrodes. Some use stepper motors to drive the movement of electrodes to draw arcs. The disadvantage of this method is that the motor speed is too slow. If the two electrodes are far apart, it takes a long time for the electrodes to be close. If the motor speed is fast, it is easy to damage the electrodes. A small number of arc generating devices use motors and some travel switches to control the motor to draw arcs, but the travel switches are inconvenient to install and there are many of them, which brings us great inconvenience. We need an arc generating device that can accurately control the moving distance and speed of the electrodes. Utility Model Content
[0005] In view of the above problems, the present application is proposed to provide an arc generating device for an arc test that overcomes the above problems or at least partially solves the above problems, comprising:
[0006] An arc generating device for an arc test is used to test whether a photovoltaic device to be tested can detect a DC arc under the conditions required by the standard, and includes a parameter acquisition module, a servo driver, a servo motor, a screw transmission structure and an electrode;
[0007] The output end of the parameter acquisition module is connected to the input end of the servo driver, the parameter acquisition module receives control parameters and sends the control parameters to the servo driver; the output end of the servo driver is connected to the input end of the servo motor, and the servo driver drives the servo motor to rotate according to the control parameters; the output end of the servo motor is connected to one end of the screw transmission structure, the other end of the screw transmission structure is connected to the electrode, and the servo motor drives the electrode to move in a straight line through the screw transmission structure; the electrode is connected to the photovoltaic device to be tested.
[0008] Preferably, the electrodes include a positive electrode and a negative electrode.
[0009] Preferably, the separation speed of the electrodes is 2.5-5 mm / s.
[0010] Preferably, the separation gap of the electrodes is 0.8-2.5 mm.
[0011] Preferably, the electrode is provided with a terminal.
[0012] Preferably, the screw transmission structure comprises a screw, a guide rail and a nut, the screw cooperates with the nut through a thread, and the nut cooperates with the guide rail.
[0013] Preferably, the arc generated by the arc generating device meets the arc conditions required by the UL 1699B photovoltaic DC arc test.
[0014] This application has the following advantages:
[0015] In the embodiments of the present application, in relation to the problem of the lack of arc generating devices capable of accurately controlling the moving distance and speed of electrodes in the prior art, the present application provides a solution that meets the UL 1699B standard, specifically comprising: a parameter acquisition module, a servo drive, a servo motor, a screw transmission structure and an electrode; the output end of the parameter acquisition module is connected to the input end of the servo drive, the parameter acquisition module receives control parameters and sends the control parameters to the servo drive; the output end of the servo drive is connected to the input end of the servo motor, the servo drive drives the servo motor to rotate according to the control parameters; the output end of the servo motor is connected to one end of the screw transmission structure, the other end of the screw transmission structure is connected to the electrode, the servo motor drives the electrode to move in a straight line through the screw transmission structure; the electrode is connected to the photovoltaic device to be tested. The arc generating device of the utility model can accurately control the moving distance and speed of the electrode. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0017] Figure 1 It is a structural schematic diagram of an arc generating device for an arc drawing test provided in one embodiment of the present application;
[0018] Figure 2 It is a structural schematic diagram of an arc generating device for an arc drawing test provided in one embodiment of the present application.
[0019] In the figure: 1. parameter acquisition module; 2. servo driver; 3. servo motor; 4. screw transmission structure; 5. electrode. DETAILED DESCRIPTION
[0020] In order to make the objects, features and advantages of the present application more obvious and understandable, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0021] It should be noted that the standard requirement described in the present invention is UL 1699B standard. The arc generating device for arc test of the present invention is used to test whether the photovoltaic device to be tested can detect / cut off the DC arc under the conditions required by the standard to determine whether the standard requirements can be met.
[0022] Reference Figure 1 and Figure 2 , shows an arc generating device for an arc test provided in an embodiment of the present application, including a parameter acquisition module 1, a servo driver 2, a servo motor 3, a screw transmission structure 4 and an electrode 5;
[0023] The output end of the parameter acquisition module 1 is connected to the input end of the servo driver 2, the parameter acquisition module 1 receives control parameters and sends the control parameters to the servo driver 2; the output end of the servo driver 2 is connected to the input end of the servo motor 3, and the servo driver 2 drives the servo motor 3 to rotate according to the control parameters; the output end of the servo motor 3 is connected to one end of the screw transmission structure 4, and the other end of the screw transmission structure 4 is connected to the electrode 5, and the servo motor 3 drives the electrode 5 to move in a straight line through the screw transmission structure 4; the electrode 5 is connected to the photovoltaic device to be tested.
[0024] In the embodiment of the present application, in relation to the problem of the lack of arc generating devices capable of accurately controlling the moving distance and speed of electrodes in the prior art, the present application provides a solution that meets the UL 1699B standard, specifically comprising: a parameter acquisition module 1, a servo driver 2, a servo motor 3, a screw transmission structure 4 and an electrode 5; the output end of the parameter acquisition module 1 is connected to the input end of the servo driver 2, the parameter acquisition module 1 receives control parameters and sends the control parameters to the servo driver 2; the output end of the servo driver 2 is connected to the input end of the servo motor 3, the servo driver 2 drives the servo motor 3 to rotate according to the control parameters; the output end of the servo motor 3 is connected to one end of the screw transmission structure 4, the other end of the screw transmission structure 4 is connected to the electrode 5, the servo motor 3 drives the electrode 5 to move in a straight line through the screw transmission structure 4; the electrode 5 is connected to the photovoltaic device to be tested. The arc generating device of the utility model can accurately control the moving distance and speed of the electrode 5.
[0025] Next, an arc generating device for an arc test in each exemplary embodiment of the present application will be further described.
[0026] It should be noted that the parameter acquisition module 1 can set the breaking distance and breaking speed. After setting the breaking distance and breaking speed, the arc generating device can automatically separate the electrode 5 to generate an arc according to the preset. The control parameters are input from the parameter acquisition module 1, and the control parameters reach the servo driver 2 through communication. The servo driver 2 calculates the signal required to control the servo motor 3 according to the set program. Under the control of the servo driver 2, the servo motor 3 rotates a certain number of times. The screw transmission structure 4 changes the rotational motion of the motor into linear motion, and according to the lead of the screw transmission structure 4, combined with the speed and number of rotations of the servo motor 3, the motor step angle can accurately control the moving distance and speed of the electrode 5.
[0027] In one embodiment of the present application, the electrode 5 includes a positive electrode and a negative electrode.
[0028] In one embodiment of the present application, the electrode 5 is provided with a terminal. Specifically, the terminals at both ends of the electrode 5 are respectively connected to the DC circuit of the photovoltaic inverter as required.
[0029] In one embodiment of the present application, the separation speed of the electrode 5 is 2.5-5 mm / s.
[0030] In one embodiment of the present application, the separation gap of the electrodes 5 is 0.8-2.5 mm.
[0031] In one embodiment of the present application, the arc generated by the arc generating device meets the arc conditions required by the UL 1699B photovoltaic DC arc test.
[0032] Specifically, according to the test standard clauses of Chapter 29 of UL 1699B, an arc generating device needs to be connected in series at the front end of the photovoltaic product. This device generates a DC arc through two electrodes at different separation speeds of 2.5-5mm / s and different separation gaps of 0.8-2.5mm, so as to determine whether the device under test can detect the DC arc and alarm / cut off the arc within 2.5s; the arc energy does not exceed 750J.
[0033] In one embodiment of the present application, the screw transmission structure 4 includes a screw, a guide rail and a nut. The screw cooperates with the nut through a thread, and the nut cooperates with the guide rail.
[0034] It should be noted that in the screw transmission structure 4 ( Figure 2 In the transmission structure, the screw rod cooperates with the nut through the thread to achieve axial movement. The nut and the guide rail are usually matched through rolling bearings or sliding bearings to reduce friction and improve transmission efficiency. In the entire transmission structure, the connection relationship between the screw rod, the guide rail and the nut is interdependent and mutually restricted, and they together constitute a complete transmission system.
[0035] The method of using the arc generating device for arc drawing test of the utility model is as follows:
[0036] 1. Connect the terminals at both ends of the two electrodes 5 to the DC circuit of the photovoltaic inverter as required.
[0037] 2. Use the oscilloscope current clamp to test the loop current, and connect the voltmeter probe in parallel across the terminals of electrode 5 to measure the arc voltage.
[0038] 3. Set the zero position when the two motors are in close contact.
[0039] 4. According to the test requirements, set the number of pulses and pulse frequency emitted by the servo controller through the key screen.
[0040] 5. After setting, start the photovoltaic equipment under test and operate it at the working voltage and current required by the standard test.
[0041] 6. Start the arc generating device, and separate the two electrodes 5 by a specified distance at a specified speed.
[0042] 7. The DC arc detection device in the photovoltaic system should detect the arc at both ends of the electrode 5 and give an alarm or cut off the circuit.
[0043] 8. Read the results from the oscilloscope. The test is considered qualified when the arc generation time does not exceed 2.5s and the energy does not exceed 750J.
[0044] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.
[0045] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.
[0046] The above is a detailed introduction to an arc generating device for arc pulling test provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.
Claims
1. An arc generating device for an arc test, characterized in that: It includes a parameter acquisition module, a servo driver, a servo motor, a screw transmission structure and an electrode; The output end of the parameter acquisition module is connected to the input end of the servo driver, the parameter acquisition module receives control parameters and sends the control parameters to the servo driver; the output end of the servo driver is connected to the input end of the servo motor, and the servo driver drives the servo motor to rotate according to the control parameters; the output end of the servo motor is connected to one end of the screw transmission structure, the other end of the screw transmission structure is connected to the electrode, and the servo motor drives the electrode to move in a straight line through the screw transmission structure; the electrode is connected to the photovoltaic device to be tested.
2. The arc generating device for arc test according to claim 1, characterized in that: The electrodes include a positive electrode and a negative electrode.
3. The arc generating device for arc drawing test according to claim 1, characterized in that: The separation speed of the electrodes is 2.5-5 mm / s.
4. The arc generating device for arc test according to claim 1, characterized in that: The separation gap of the electrodes is 0.8-2.5 mm.
5. The arc generating device for arc test according to claim 1, characterized in that: The electrodes are provided with terminals.
6. The arc generating device for arc drawing test according to claim 1, characterized in that: The screw transmission structure comprises a screw, a guide rail and a nut. The screw cooperates with the nut through a thread, and the nut cooperates with the guide rail.
7. The arc generating device for arc test according to claim 1, characterized in that: The arc generated by the arc generating device meets the arc conditions required by the UL 1699B photovoltaic DC arc test.