An arc generator for DC arc detection of photovoltaic inverter

Abstract

The present invention relates to the technical field of arc detection devices, and more specifically, to an arc generator for DC arc detection of photovoltaic inverters, comprising a bending frame, a moving mechanism and a fixing mechanism arranged inside the bending frame, wherein the moving mechanism comprises a moving part that is driven by an external electric push rod to move within the frame, a transmission part arranged inside the moving part from bottom to top, a center tooth and a limit part, and a moving copper rod fixed at the center of the outer wall of the center tooth by a clamping frame. The arc generator for DC arc detection of photovoltaic inverters, through the linkage design of the moving mechanism and the fixing mechanism, realizes the precise coordinated adjustment of the angle and distance between the moving copper rod and the fixed copper rod, and can simulate multi-angle arc faults in complex scenarios such as cable breakage and poor contact, greatly improving the test coverage and authenticity of arc detection of photovoltaic inverters.

Description

Technical Field

[0001] The invention relates to the technical field of arc detection devices, and in particular to an arc generator for direct current arc detection of a photovoltaic inverter. Background Art

[0002] The arc generator is a key device for DC arc detection of photovoltaic inverters. It simulates DC arc faults through experiments to verify the arc detection and cutting capabilities of the inverter. Its working principle is to accurately control current and voltage, generate stable arcs, and simulate real fault scenarios. This device is crucial to ensuring the safety of the inverter, and can effectively prevent the risk of fire caused by arcs and ensure the stable operation of the photovoltaic system.

[0003] The patent application number CN202323583824.X discloses an arc generator for DC arc detection of photovoltaic inverters, including: a base, a housing, a motor drive assembly, a first copper rod assembly, a second copper rod assembly, and a sliding assembly. The motor drive assembly controls the movement of the sliding assembly, thereby driving the second copper rod assembly to move relative to the first copper rod assembly to generate an arc, meeting the DC arc detection requirements of photovoltaic inverters. The operation process and overall structure are simple and easy to implement, which can effectively reduce its detection cost and workload.

[0004] However, traditional equipment usually uses fixed copper rods or simple linear displacement designs, which can only simulate arcing faults at a single angle or fixed distance. It is impossible to coordinately adjust the angle and distance between the copper rods, which makes it difficult to reproduce complex scenarios such as cable breakage and poor contact. It cannot meet the photovoltaic inverter's needs for multi-dimensional arc detection. In addition, the existing equipment needs to manually adjust the position of the copper rod after the experiment or reset it in steps through independent drive components. There is a lack of a linkage reset mechanism, which makes parameter reset time-consuming and cumbersome.

[0005] In view of this, we propose an arc generator for DC arc detection in photovoltaic inverters. Summary of the invention

[0006] The object of the present invention is to provide an arc generator for DC arc detection of a photovoltaic inverter to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] An arc generator for DC arc detection of a photovoltaic inverter comprises a bending frame, a moving mechanism and a fixing mechanism arranged inside the bending frame;

[0009] The bending frame comprises a frame body, a tooth plate arranged on the bottom surface of the frame body, and a pull frame sleeved on the outside of the frame body;

[0010] The moving mechanism includes a moving part driven by an external electric push rod to move in the frame, a transmission part, a center tooth and a limit part arranged inside the moving part from bottom to top, and a moving copper rod fixed at the center of the outer wall of the center tooth by a clamping frame. When the moving part moves to the left, the transmission part cooperates with the tooth plate to drive the center tooth to rotate, so that the fixed angle of the moving copper rod changes;

[0011] The fixing mechanism includes a slider, a fixed copper rod fixed to the outside of the slider through a clamping frame, a pulling part and a pressing part arranged above the slider, and a pull rope connected between the slider and the pulling part;

[0012] The pulling part includes a wire wheel, an inner circular plate arranged inside the wire wheel, and a number of protrusions regularly distributed on the outer wall of the inner circular plate. A cam groove adapted to the protrusion is opened on the inner wall of the wire wheel. When the moving part moves, the inner circular plate will also move inside the wire wheel. After the wire wheel rotates, the position of the fixed copper rod is driven to move up by tightening the pull rope, and the angle between the fixed copper rod and the movable copper rod is adjusted to perform an arc pulling experiment simulating cable breakage and poor contact.

[0013] In the technical solution of the present invention, a convex strip for limiting the fixed position of the pull frame is welded on the outer side wall of the frame longitudinal plate, and the tooth plate is welded and fixed on the top surface of the frame transverse plate.

[0014] In the technical solution of the present invention, the moving part includes a moving frame sliding in the frame, a limit frame welded to the moving frame for limiting the position of the moving copper rod, and an extension rod clamped on the outer side wall of the moving frame.

[0015] In the technical solution of the present invention, the transmission part includes two parallel front and rear transmission teeth, a ratchet arranged inside the rear transmission teeth, a connecting shaft clamped between the front transmission teeth and the ratchet, and a plurality of ratchet claws rotatably connected to the inner side of the rear transmission tooth ring wall and in contact with the ratchet. The transmission teeth and the connecting shaft located on the rear side are both rotatably connected to the interior of the moving frame, and the transmission teeth are meshed with the tooth plate.

[0016] In the technical solution of the present invention, the central tooth rotates inside the moving frame and meshes with the transmission tooth, and a counterweight ring is sleeved on the front end of the moving copper rod.

[0017] In the technical solution of the present invention, the limiting part includes a horizontal plate, a convex tooth integrally formed under the horizontal plate, a plurality of first springs welded to the top surface of the horizontal plate, a limiting telescopic rod sleeved on the inner side of the first spring, and a plate body convex shaft clamped in the horizontal plate, an arc-shaped notch is opened on one side of the bottom end of the convex tooth, the top end of the first spring is welded to the inner top surface of the moving frame, the upper and lower ends of the limiting telescopic rod are respectively clamped to the top surface of the horizontal plate and the inner top surface of the moving frame, and the front end of the plate body convex shaft extends to the horizontal bar below the pull frame.

[0018] In the technical solution of the present invention, the fixing mechanism further comprises a fixing frame body clamped on the top surface of the frame body, and a sliding groove for the slider to move is provided inside the fixing frame body.

[0019] In the technical solution of the present invention, the wire wheel is rotatably connected to the inside of a fixed frame, one end of the pull rope is wrapped around the outside of the wire wheel, and the other end is adhered to the top surface of the slider, and ring teeth are clamped on the outside of the ring walls at both ends of the wire wheel. The inner circular plate is slidably connected to the inside of the wire wheel, and the protrusion is integrally formed with the inner circular plate.

[0020] In the technical solution of the present invention, the central axis of the right side of the inner circular plate extends to the outside of the fixed frame and is clamped with a stop plate. The central axis of the right side of the inner circular plate is slidably connected to the outer wall of the fixed frame. A second spring is welded on the side wall of one end of the inner circular plate, and the other end of the second spring is in contact with the inner wall of the fixed frame.

[0021] In the technical solution of the present invention, the pressing part includes a pressing frame, a plurality of third springs welded on the top surface of the pressing frame, and a frame body convex shaft clamped on the outer wall of the pressing frame. The end of the frame body convex shaft is along the horizontal bar above the pull frame. The bottom surface of the pressing frame is integrally formed with an arc-shaped protrusion that interferes with the ring teeth, and the top end of the third spring is welded to the inner top surface of the fixed frame.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The arc generator for DC arc detection of photovoltaic inverters realizes the precise coordinated adjustment of the angle and distance between the moving copper rod and the fixed copper rod through the linkage design of the moving mechanism and the fixed mechanism. It can simulate multi-angle arc faults in complex scenarios such as cable breakage and poor contact, greatly improving the test coverage and authenticity of photovoltaic inverter arc detection.

[0024] 2. The arc generator of the photovoltaic inverter DC arc detection can change the internal structure of the limit part and the downward pressure part by pulling the pull frame, so that the movable copper rod and the fixed copper rod are reset under the gravity of the counterweight ring and the slider respectively, so as to realize the rapid reset of the experimental parameters, reduce manual intervention and improve the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the bending frame in the present invention;

[0027] Figure 3 It is a schematic cross-sectional view of the structure of the moving mechanism in the present invention;

[0028] Figure 4It is a schematic cross-sectional view of the structure of the moving part in the present invention;

[0029] Figure 5 It is a schematic cross-sectional view of the structure of the transmission part in the present invention;

[0030] Figure 6 It is a structural schematic diagram of the limiting part in the present invention;

[0031] Figure 7 It is a schematic cross-sectional view of the structure of the fixing mechanism in the present invention;

[0032] Figure 8 It is a schematic cross-sectional view of the structure of the pulling part in the present invention;

[0033] Fig. 9 It is a partial structural schematic diagram of the pulling part in the present invention;

[0034] Fig.10 It is a structural schematic diagram of the lower pressing part in the present invention;

[0035] Description of reference numerals:

[0036] 100, bending frame; 110, frame body; 120, tooth plate; 130, pull frame; 140, convex strip;

[0037] 200, moving mechanism; 210, moving part; 211, moving frame; 212, extension rod; 213, limiting frame; 220, transmission part; 221, transmission tooth; 222, connecting shaft; 223, ratchet; 224, pawl; 230, center tooth; 240, limiting part; 241, horizontal plate; 242, convex tooth; 243, first spring; 244, plate body convex shaft; 245, limiting telescopic rod; 250, moving copper rod; 260, counterweight ring;

[0038] 300, fixing mechanism; 310, fixing frame; 320, sliding block; 330, fixing copper rod; 340, pulling rope; 350, pulling part; 351, wire wheel; 3510, cam groove; 352, ring gear; 353, inner circular plate; 354, protrusion; 355, abutment plate; 356, second spring; 360, pressing part; 361, pressing frame; 362, third spring; 363, frame body protruding shaft. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-Figure 10As shown, this embodiment provides a technical solution:

[0041] An arc generator for DC arc detection of a photovoltaic inverter includes a bending frame 100, a moving mechanism 200 and a fixing mechanism 300 arranged inside the bending frame 100;

[0042] In this embodiment, Figure 2 As shown, the bending frame 100 includes a frame body 110, a tooth plate 120 disposed on the inner bottom surface of the frame body 110, and a pull frame 130 sleeved on the outer side of the frame body 110.

[0043] Specifically, a convex strip 140 for limiting the fixed position of the pull frame 130 is welded on the outer side wall of the longitudinal plate of the frame body 110 , and the tooth plate 120 is welded and fixed on the top surface of the transverse plate of the frame body 110 .

[0044] Furthermore, the frame 110 is used to limit the moving range of the moving mechanism 200 and provide a placement range for the fixing mechanism 300 , and the tooth plate 120 is used to drive the internal structure of the moving mechanism 200 to rotate.

[0045] In this embodiment, Figure 3-Figure 5 As shown, the moving mechanism 200 includes a moving part 210 driven by an external electric push rod to move in the frame 110, a transmission part 220 arranged from bottom to top inside the moving part 210, a center tooth 230 and a limit part 240, and a moving copper rod 250 fixed at the center of the outer wall of the center tooth 230 by a clamping frame. When the moving part 210 moves to the left, the transmission part 220 can cooperate with the tooth plate 120 to drive the center tooth 230 to rotate, thereby changing the fixed angle of the moving copper rod 250.

[0046] Specifically, the moving part 210 includes a moving frame 211 sliding in the frame 110 , a limit frame 213 welded to the moving frame 211 for limiting the position of the moving copper rod 250 , and an extension rod 212 clamped on the outer wall of the moving frame 211 .

[0047] Furthermore, the transmission part 220 includes two parallel transmission teeth 221 arranged in front and rear, a ratchet 223 arranged inside the rear transmission teeth 221, a connecting shaft 222 clamped between the front transmission teeth 221 and the ratchet 223, and a plurality of ratchet claws 224 rotatably connected to the inner side of the ring wall of the rear transmission teeth 221 and in contact with the ratchet 223. The transmission teeth 221 and the connecting shaft 222 located on the rear side are both rotatably connected to the inside of the movable frame 211, and the transmission teeth 221 are meshed with the tooth plate 120.

[0048] Furthermore, the central tooth 230 rotates inside the moving frame 211 and meshes with the transmission tooth 221 , and a counterweight ring 260 is sleeved on the front end of the moving copper rod 250 .

[0049] Furthermore, the movable frame 211 will move left and right inside the frame 110 under the control of the external electric push rod. The limit frame 213 is used to allow the movable copper rod 250 to maintain a horizontal state. The extension rod 212 is used to move with the movable frame 211. When the transmission tooth 221 at the front end of the transmission part 220 conflicts with the tooth plate 120, it will rotate, and the ratchet 223 will be driven to rotate together through the connecting shaft 222. After the ratchet 223 conflicts with the pawl 224, it drives the transmission tooth 221 at the rear side to rotate, and then drives the center tooth 230 to rotate counterclockwise. The left end of the movable copper rod 250 is lifted through the clamping frame, and the counterweight ring 260 provides a downward force on the end of the movable copper rod 250 through its own gravity.

[0050] In this embodiment, Figure 6 As shown, the limiting portion 240 includes a horizontal plate 241, a convex tooth 242 integrally formed below the horizontal plate 241, a plurality of first springs 243 welded to the top surface of the horizontal plate 241, a limiting telescopic rod 245 sleeved on the inner side of the first spring 243, and a plate body convex shaft 244 clamped in the horizontal plate 241, an arc-shaped notch is opened on one side of the bottom end of the convex tooth 242, the top end of the first spring 243 is welded to the inner top surface of the moving frame 211, the upper and lower ends of the limiting telescopic rod 245 are respectively clamped to the top surface of the horizontal plate 241 and the inner top surface of the moving frame 211, and the front end of the plate body convex shaft 244 extends to the horizontal bar below the pull frame 130.

[0051] Furthermore, the elastic force provided by the first spring 243 provides a downward force on the cross plate 241, and the arc-shaped notch at the bottom end of the convex tooth 242 will allow the center tooth 230 to only rotate counterclockwise under the action of the elastic force of the first spring 243. The limiting telescopic rod 245 is used to limit the telescopic range of the first spring 243. After the pull frame 130 is pulled upward, the cross plate 241 will be driven to move upward through the plate body convex shaft 244, and the convex tooth 242 will be separated from the center tooth 230, so that the counterweight ring 260 can pull the movable copper rod 250 to reset its position.

[0052] In this embodiment, Figure 7-Figure 9 As shown, the fixing mechanism 300 includes a slider 320, a fixed copper rod 330 fixed to the outside of the slider 320 by a clamping frame, a pulling part 350 and a pressing part 360 arranged above the slider 320, and a pull rope 340 connected between the slider 320 and the pulling part 350.

[0053] Specifically, the fixing mechanism 300 further includes a fixing frame 310 that is clamped on the top surface of the frame 110 , and a sliding groove for the slider 320 to move is provided inside the fixing frame 310 .

[0054] Furthermore, the pulling part 350 includes a wire wheel 351, an inner circular plate 353 arranged inside the wire wheel 351, and a plurality of protrusions 354 regularly distributed on the outer wall of the inner circular plate 353. A cam groove 3510 adapted to the protrusion 354 is opened on the inner wall of the wire wheel 351. When the movable part 210 moves, the inner circular plate 353 will also move inside the wire wheel 351. After the wire wheel 351 rotates, the position of the fixed copper rod 330 is driven to move up by tightening the pull rope 340, and the angle between the fixed copper rod 330 and the movable copper rod 250 is adjusted to perform an arc drawing experiment simulating cable breakage and poor contact.

[0055] Furthermore, the wire wheel 351 is rotatably connected to the inside of the fixed frame 310, one end of the pull rope 340 is wrapped around the outside of the wire wheel 351, and the other end is adhered to the top surface of the slider 320, and the outer sides of the ring walls at both ends of the wire wheel 351 are clamped with ring teeth 352, the inner circular plate 353 is slidably connected to the inside of the wire wheel 351, and the protrusion 354 is integrally formed with the inner circular plate 353.

[0056] Furthermore, the central axis of the right side of the inner circular plate 353 extends to the outside of the fixed frame 310 and is clamped with a stop plate 355. The central axis of the right side of the inner circular plate 353 is slidably connected to the outer wall of the fixed frame 310. A second spring 356 is welded to the side wall of one end of the inner circular plate 353, and the other end of the second spring 356 is in contact with the inner wall of the fixed frame 310.

[0057] Furthermore, when the movable copper rod 250 contacts the fixed copper rod 330, the extension rod 212 will squeeze the plate 355 and drive the inner circular plate 353 to move leftward on the wire wheel 351, and the movement of the protrusion 354 in the cam groove 3510 drives the wire wheel 351 to rotate, and then the slider 320 is pulled upward by the pull rope 340;

[0058] When the movable copper rod 250 is separated from the fixed copper rod 330, the inner circular plate 353 will be reset under the elastic force of the second spring 356, and after the wire wheel 351 rotates again, the slider 320 is pulled up by the pull rope 340, and when the movable copper rod 250 moves away, the fixed copper rod 330 is pulled up.

[0059] In this embodiment, Fig.10 As shown, the pressing portion 360 includes a pressing frame 361, a plurality of third springs 362 welded to the top surface of the pressing frame 361, and a frame body protrusion 363 clamped on the outer wall of the pressing frame 361, the end of the frame body protrusion 363 is along the horizontal bar above the pull frame 130, the bottom surface of the pressing frame 361 is integrally formed with an arc-shaped protrusion that abuts against the ring tooth 352, and the top end of the third spring 362 is welded to the inner top surface of the fixed frame 310.

[0060] Furthermore, the third spring 362 provides a downward force on the lower pressure frame 361 through its own elastic force, and the lower pressure frame 361 can limit the rotation of the wire wheel 351 in only one direction through the arc-shaped protrusion on the bottom surface cooperating with the ring tooth 352. In the process of pulling the pull frame 130, the frame body protrusion shaft 363 and the lower pressure frame 361 will also be driven to move upward together, so that the fixed copper rod 330 is reset under the action of the gravity of the slider 320, and prepare for the next set of arc drawing experiments.

[0061] When the arc generator for detecting DC arc of photovoltaic inverter of the present invention is used, first, the movable copper rod 250 and the fixed copper rod 330 are connected to the DC power supply respectively, and the external electric push rod is controlled to drive the movable mechanism 200 to move to the left as a whole inside the bending frame 100, so that the movable copper rod 250 and the fixed copper rod 330 are separated to generate an arc, and the operator then observes and records the DC arcing under the normal break of the wire;

[0062] Next, the operator turns off the DC power supply and controls the external electric push rod to drive the moving mechanism 200 to restore its position. During this process, the transmission tooth 221 at the front end of the transmission part 220 contacts the tooth plate 120 and rotates, and the ratchet 223 is driven to rotate together through the connecting shaft 222. After the ratchet 223 contacts the pawl 224, the transmission tooth 221 at the rear side is driven to rotate.

[0063] After the transmission tooth 221 at the rear side rotates, it drives the central tooth 230 to rotate counterclockwise, and the left end of the moving copper rod 250 is lifted through the clamping frame;

[0064] Then, when the movable copper rod 250 contacts the fixed copper rod 330, the extension rod 212 squeezes the plate 355 and drives the inner circular plate 353 to move leftward on the wire wheel 351. The movement of the protrusion 354 in the cam groove 3510 drives the wire wheel 351 to rotate, and then the slider 320 is pulled upward by the pull rope 340.

[0065] After that, the DC power supply is turned on again, and the moving mechanism 200 is controlled to continue to move to the left, so that the moving copper rod 250 moves away from the fixed copper rod 330 again to generate an arc. At this time, the inner circular plate 353 will be reset under the elastic force of the second spring 356, and the wire wheel 351 will rotate and pull the slider 320 upward through the pull rope 340. When the moving copper rod 250 moves away, the fixed copper rod 330 is pulled upward, thereby simulating a real fault scenario.

[0066] Repeat the above operation to detect the arcing conditions of the movable copper rod 250 and the fixed copper rod 330 at different angles, thereby simulating the arcing conditions under different power line break conditions in the actual process;

[0067] Subsequently, the DC power supply is turned off and on, and the moving mechanism 200 is controlled to reset, and the pull frame 130 is pulled upward, while the cross plate 241 and the lower pressure frame 361 are moved upward, and the moving copper rod 250 and the fixed copper rod 330 are reset under the gravity of the counterweight ring 260 and the slider 320 respectively.

[0068] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the specification and its equivalents.

Claims

1. An arc generator for DC arc detection of photovoltaic inverter, characterized in that: It includes a bending frame, a moving mechanism and a fixing mechanism arranged inside the bending frame; The bending frame includes a frame body, a tooth plate arranged on the bottom surface of the frame body, and a pull frame sleeved on the outside of the frame body; The moving mechanism includes a moving part driven by an external electric push rod to move in the frame, a transmission part, a center tooth and a limit part arranged inside the moving part from bottom to top, and a moving copper rod fixed at the center of the outer wall of the center tooth by a clamping frame. When the moving part moves to the left, the transmission part cooperates with the tooth plate to drive the center tooth to rotate, so that the fixed angle of the moving copper rod changes; The fixing mechanism includes a slider, a fixed copper rod fixed to the outside of the slider through a clamping frame, a pulling part and a pressing part arranged above the slider, and a pull rope connected between the slider and the pulling part; The pulling part includes a wire wheel, an inner circular plate arranged inside the wire wheel, and a number of protrusions regularly distributed on the outer wall of the inner circular plate. A cam groove adapted to the protrusion is opened on the inner wall of the wire wheel. When the moving part moves, the inner circular plate will also move inside the wire wheel. After the wire wheel rotates, the position of the fixed copper rod is driven to move up by tightening the pull rope, and the angle between the fixed copper rod and the movable copper rod is adjusted to perform an arc pulling experiment simulating cable breakage and poor contact.

2. The arc generator for photovoltaic inverter DC arc detection according to claim 1, characterized in that: A convex strip for limiting the fixed position of the pull frame is welded on the outer side wall of the frame longitudinal plate, and the tooth plate is welded and fixed on the top surface of the frame transverse plate.

3. The arc generator for photovoltaic inverter DC arc detection according to claim 1, characterized in that: The moving part comprises a moving frame body sliding in the frame body, a limiting frame welded to the moving frame body for limiting the position of the moving copper rod, and an extension rod clamped on the outer side wall of the moving frame body.

4. The arc generator for DC arc detection of photovoltaic inverter according to claim 1, characterized in that: The transmission part includes two parallel transmission teeth arranged at the front and rear, a ratchet arranged inside the rear transmission teeth, a connecting shaft clamped between the front transmission teeth and the ratchet, and a plurality of ratchet claws rotatably connected to the inner side of the rear transmission tooth ring wall and in contact with the ratchet. The transmission teeth and the connecting shaft located at the rear side are both rotatably connected to the inside of the moving frame, and the transmission teeth are meshed with the tooth plate.

5. The arc generator for photovoltaic inverter DC arc detection according to claim 1, characterized in that: The central tooth rotates inside the moving frame and meshes with the transmission tooth, and a counterweight ring is sleeved on the front end of the moving copper rod.

6. The arc generator for photovoltaic inverter DC arc detection according to claim 1, characterized in that: The limiting part includes a horizontal plate, a convex tooth integrally formed under the horizontal plate, a plurality of first springs welded to the top surface of the horizontal plate, a limiting telescopic rod sleeved on the inner side of the first spring, and a plate body convex shaft clamped in the horizontal plate, an arc-shaped notch is opened on one side of the bottom end of the convex tooth, the top end of the first spring is welded to the inner top surface of the moving frame, the upper and lower ends of the limiting telescopic rod are respectively clamped to the top surface of the horizontal plate and the inner top surface of the moving frame, and the front end of the plate body convex shaft extends to the horizontal bar below the pull frame.

7. The arc generator for photovoltaic inverter DC arc detection according to claim 1, characterized in that: The fixing mechanism also includes a fixing frame body which is clamped on the top surface of the frame body, and a sliding groove for the sliding block to move is provided inside the fixing frame body.

8. The arc generator for photovoltaic inverter DC arc detection according to claim 1, characterized in that: The wire wheel is rotatably connected to the inside of the fixed frame, one end of the pull rope is wrapped around the outside of the wire wheel, and the other end is adhered to the top surface of the slider, and ring teeth are clamped on the outside of the ring walls at both ends of the wire wheel. The inner circular plate is slidably connected to the inside of the wire wheel, and the protrusion is integrally formed with the inner circular plate.

9. The arc generator for photovoltaic inverter DC arc detection according to claim 1, characterized in that: The central axis of the right side of the inner circular plate extends to the outside of the fixed frame and is clamped with a butt plate. The central axis of the right side of the inner circular plate is slidably connected to the outer wall of the fixed frame. A second spring is welded on the side wall of one end of the inner circular plate, and the other end of the second spring is in contact with the inner wall of the fixed frame.

10. The arc generator for photovoltaic inverter DC arc detection according to claim 8, characterized in that: The pressing part includes a pressing frame, a plurality of third springs welded on the top surface of the pressing frame, and a frame body convex shaft clamped on the outer wall of the pressing frame. The end of the frame body convex shaft is along the horizontal bar above the pull frame. The bottom surface of the pressing frame is integrally formed with an arc-shaped convex block that abuts against the ring teeth. The top end of the third spring is welded to the inner top surface of the fixed frame.

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