Anti-discharge bus structure of medium-high frequency inverter power supply

Abstract

The invention discloses a medium-high frequency inverter power supply anti-discharge bus structure which comprises a bottom frame and a capacitor, the top of the capacitor is provided with an insulating plate, a cathode busbar wire, an isolation plate, an anode busbar wire and a protection plate through fixing bolts, and the insulating plate, the cathode busbar wire, the isolation plate, the anode busbar wire and the protection plate are sequentially installed from bottom to top. The opposite surfaces of the cathode busbar wire and the anode busbar wire are provided with grid conductive channels. By designing the grid conductive channels on the surfaces of the cathode busbar wire and the anode busbar wire, the original discharge paths of the cathode busbar wire and the anode busbar wire can be damaged, and the discharge current is artificially guided to flow along the preset path, so that the disordered propagation and accumulation of the discharge energy on the surfaces of the cathode busbar wire and the anode busbar wire are avoided, and the service life of the cathode busbar wire and the anode busbar wire is prolonged. The problem that the insulating material is damaged by creeping discharge is solved, and the destructive effect of discharge energy on the surfaces of the cathode busbar wire and the anode busbar wire is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of electrical equipment, in particular to a medium-high frequency inverter power supply discharge prevention busbar structure. Background Art

[0002] A medium and high frequency inverter is a power supply device that converts direct current (DC) into alternating current (AC). Its operating frequency is usually higher than the industrial frequency. A high frequency inverter usually has a variety of protection functions such as short circuit protection and overload protection. It can cut off the power supply in time when the load is abnormal to protect the safety of the equipment and the load. The medium and high frequency inverter has high stability and precise voltage regulation capability. It can accurately control and adjust the output voltage as needed to meet the needs of different equipment. The inverter bus mainly plays the role of transmitting and distributing electric energy in the medium and high frequency inverter. It transmits the electric energy input from the DC power supply to the inverter part. After conversion by the high frequency switch tube of the inverter, the converted AC electric energy is output to the load end. The inverter bus is an indispensable electrical component in the inverter. Its stability and reliability play a vital role in the normal operation of the entire inverter. Once there is a problem with the inverter bus, it will cause the inverter to fail, which will affect the operation of the entire power system. Therefore, a medium and high frequency inverter anti-discharge bus structure is proposed.

[0003] In the process of realizing the present invention, the inventors found that at least the following problems exist in the prior art that have not been solved: it is impossible to conduct the current gathered on the surface of the busbar, and when the electric field strength is high enough, a discharge channel will be formed on the electrode surface, causing the discharge energy to propagate into the interior of the electrode, causing the electric field to gather in the surface area of ​​the busbar insulation, forming a conductive path, thereby leading to the occurrence of surface discharge. Surface discharge will not only damage the insulating material, but may also cause serious problems such as short circuit and arc, posing a threat to the stable operation of the power system. For this reason, we propose a medium and high frequency inverter power supply discharge-proof busbar structure to solve the existing problems. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art, such as: it is impossible to conduct the current gathered on the surface of the busbar, and when the electric field strength is high enough, a discharge channel will be formed on the electrode surface, causing the discharge energy to propagate into the inside of the electrode, causing the electric field to gather in the busbar insulation surface area, forming a conductive path, thereby causing surface discharge. Surface discharge will not only damage the insulating material, but may also cause serious problems such as short circuit and arc, posing a threat to the stable operation of the power system.

[0005] To achieve the above object, the present invention provides the following technical solutions: A medium-high frequency inverter power supply discharge prevention busbar structure comprises a base frame and a capacitor, wherein a mounting plate is installed on the top of the base frame by bolts, the capacitor is embedded and installed inside the mounting plate, a mounting groove is provided on the top of the capacitor, a cathode terminal and an anode terminal are respectively installed on both sides of the mounting groove, an insulating plate, a cathode busbar line, a separator, an anode busbar line, and a protective plate are respectively installed on the top of the capacitor by fixing bolts, and the insulating plate, the cathode busbar line, the separator, the anode busbar line, and the protective plate are installed in sequence from bottom to top, and grid conductive channels are provided on the surfaces opposite to the cathode busbar line and the anode busbar line.

[0006] Preferably, the grid conductive channel is made of a conductive polymer material, and cathode holes are equidistantly provided inside the cathode busbar, and two groups of first mounting holes are provided on one side of the cathode hole.

[0007] Preferably, second mounting holes are equidistantly formed inside the anode busbar, and an anode hole is formed on one side of the second mounting hole.

[0008] Preferably, heat sinks are equidistantly mounted on the top of the protective plate, and a rubber strip is fixedly mounted on one side of the protective plate.

[0009] Preferably, third mounting holes are equidistantly formed on the top of the protective plate, an insulating seat is embedded in the third mounting hole, a protective cap is threadedly mounted on the top of the insulating seat, and fixing bolts are installed through the inside of the insulating seat.

[0010] Preferably, mounting rings are equidistantly installed at the bottom of the insulating plate, and fourth mounting holes are equidistantly opened inside the mounting rings.

[0011] Preferably, fifth mounting holes are equidistantly provided inside the isolation plate, and isolation strips are fixedly mounted on both sides of the isolation plate.

[0012] Preferably, a positioning pin is fixedly installed at the center of the installation groove, and internal threads are provided inside the cathode end and the anode end.

[0013] Preferably, shock absorbers are installed on the bolts on both sides of the bottom of the chassis, and mounting brackets are installed on the bolts at the bottom of the shock absorbers.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention can destroy the original discharge paths of the cathode busbar and the anode busbar by designing grid conductive channels on the surfaces of the cathode busbar and the anode busbar, artificially guide the discharge current to flow along a predetermined path, thereby avoiding the disorderly propagation and accumulation of discharge energy on the surfaces of the cathode busbar and the anode busbar, solving the problems of surface discharge causing damage to insulating materials, and possibly causing short circuits and arcs, and reducing the destructive effect of discharge energy on the surfaces of the cathode busbar and the anode busbar; and the grid conductive channels can disperse the discharge energy and transmit it along multiple paths, thereby reducing the discharge energy density on each path and reducing the damage of the discharge to the electrodes; and by reasonably designing the shape and layout of the grid conductive channels, the occurrence of surface discharge of the cathode busbar and the anode busbar can be effectively prevented, and the discharge performance and stability of the cathode busbar and the anode busbar can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the expanded structure of the present invention; Figure 3 It is a schematic diagram of the local structure of the capacitor of the present invention; Figure 4 It is a schematic diagram of the expanded structure of the cathode busbar, the anode busbar, the protection plate, the insulation plate, and the isolation plate of the present invention; Figure 5 This is a schematic diagram of the cathode busbar structure of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the cathode busbar line of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the local structure of middle A; Figure 8 It is a schematic diagram of the structure of the anode busbar of the present invention; Fig. 9 It is a schematic diagram of the structure of the protective plate of the present invention; Fig.10 It is a schematic diagram of the structure of the insulation board of the present invention; Fig.11 It is a schematic diagram of the isolation plate structure of the present invention.

[0016] In the figure: 1, chassis; 101, shock absorber; 102, mounting bracket; 103, mounting plate; 2, capacitor; 201, cathode terminal; 202, anode terminal; 203, positioning pin; 204, mounting groove; 3, cathode busbar; 301, grid conductive channel; 302, cathode hole; 303, first mounting hole; 4, anode busbar; 401, second mounting hole; 402, anode hole; 5, protective plate; 501, heat sink; 502, third mounting hole; 6, protective cap; 601, insulating seat; 602, fixing bolt; 7, insulating plate; 701, mounting ring; 702, fourth mounting hole; 8, isolation plate; 801, fifth mounting hole. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of 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 of 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.

[0018] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] See also Figure 1-11The present invention proposes a medium-high frequency inverter power supply discharge prevention busbar structure, comprising a base frame 1 and a capacitor 2. A mounting plate 103 is installed on the top of the base frame 1 by bolts, and the capacitor 2 is embedded and installed inside the mounting plate 103. A mounting groove 204 is provided on the top of the capacitor 2, and a cathode terminal 201 and an anode terminal 202 are respectively installed on both sides of the mounting groove 204. An insulating plate 7, a cathode busbar line 3, an isolating plate 8, an anode busbar line 4, and a protective plate 5 are respectively installed on the top of the capacitor 2 by fixing bolts 602, and the insulating plate 7, the cathode busbar line 3, the isolating plate 8, the anode busbar line 4, and the protective plate 5 are installed in sequence from bottom to top, and the surfaces opposite to the cathode busbar line 3 and the anode busbar line 4 are provided with a grid conductive channel 301; It should be noted that the cathode busbar 3 and the anode busbar 4 are both composed of busbars and insulating materials, and the insulating material is wrapped on the outside of the busbars. The isolation plate 8 is made of FR-4 epoxy board with high insulation performance. The guide end of the grid conductive channel 301 can be externally connected to a guide line to guide the discharge current of the cathode busbar 3 and the anode busbar 4 to the ground, thereby eliminating the discharge current and the static electricity accumulated on the surface of the cathode busbar 3 and the anode busbar 4 to avoid causing discharge. The insulating plate 7 and the isolation plate 8 are used to increase isolation measures, effectively increase the electrical clearance and creepage distance between the series busbars of the capacitor 2, thereby improving the stability and safety of the power supply, and improving the stability and safety of the inverter power supply. The cathode busbar 3 and the anode busbar 4 are isolated by the isolation plate 8, and the electrical clearance and creepage distance are increased to avoid crossing and overlapping between the cathode busbar 3 and the anode busbar 4, so as to reduce electromagnetic interference and voltage fluctuations, and prevent short circuits and discharge between the busbars.

[0021] Furthermore, the grid conductive channel 301 is made of a conductive polymer material, and cathode holes 302 are equidistantly provided inside the cathode busbar 3, and two groups of first mounting holes 303 are provided on one side of the cathode hole 302; It should be noted that the conductive polymer material has good conductivity and mechanical strength to ensure that it can stably guide the discharge current. The cathode hole 302 provides a connection position for the cathode terminal 201, and the two groups of first mounting holes 303 provide penetration positions for the positioning pin 203 and the anode terminal 202 respectively.

[0022] Furthermore, the inside of the anode busbar 4 is provided with second mounting holes 401 at equal intervals, and one side of the second mounting hole 401 is provided with an anode hole 402; It should be noted that the second mounting hole 401 provides an embedding position for the insulating seat 601 and corresponds to the cathode hole 302 . The anode hole 402 provides a connection position for the anode terminal 202 and corresponds to the first mounting hole 303 on the far right.

[0023] Furthermore, heat sinks 501 are equidistantly mounted on the top of the protective plate 5, and a rubber strip is fixedly mounted on one side of the protective plate 5; It should be noted that the protective plate 5 is made of nano-insulating material, which has good insulation effect and mechanical strength. The protective plate 5 can wrap and protect the surface of the anode busbar 4 to provide additional isolation and protection, avoiding the contamination of the busbar insulation surface and the formation of a conductive path, thereby ensuring the stable operation of the power system. The protective plate 5 transfers the heat generated by the conductive current of the anode busbar 4 to the heat sink 501. The heat sink 501 can increase the heat dissipation area of ​​the protective plate 5, improve the heat dissipation effect of the protective plate 5, accelerate the heat dissipation efficiency of the anode busbar 4, and avoid heat accumulation.

[0024] Furthermore, the top of the protective plate 5 is equidistantly provided with third mounting holes 502, the inside of the third mounting holes 502 is embedded with an insulating seat 601, the top of the insulating seat 601 is threadedly installed with a protective cap 6, and the inside of the insulating seat 601 is penetrated with a fixing bolt 602; It should be noted that the third mounting hole 502 provides a mounting position for the insulating seat 601 , and the insulating seat 601 and the protective cap 6 can insulate and wrap the fixing bolt 602 to provide additional isolation and protection to prevent short circuit and discharge between the busbars.

[0025] Furthermore, a mounting ring 701 is equidistantly installed at the bottom of the insulating plate 7, and fourth mounting holes 702 are equidistantly opened inside the mounting ring 701; It should be noted that the mounting ring 701 is engaged with the mounting groove 204 to increase the sealing effect of the connection between the insulating plate 7 and the capacitor 2 , and the fourth mounting holes 702 are respectively used as positioning pins 203 , and provide mounting positions for the cathode terminal 201 and the anode terminal 202 .

[0026] Furthermore, fifth mounting holes 801 are equidistantly provided inside the isolation plate 8, and isolation strips are fixedly installed on both sides of the isolation plate 8; It should be noted that the fifth mounting hole 801 corresponds to the fourth mounting hole 702, and the fifth mounting hole 801 passes through the connecting positioning pin 203, the cathode end 201, and the anode end 202 respectively. The isolation strip can further isolate the anode busbar line 4 from the cathode busbar line 3, thereby improving the isolation effect of the anode busbar line 4 and the cathode busbar line 3, so as to increase the redundancy of the electrical clearance and creepage distance.

[0027] Furthermore, a positioning pin 203 is fixedly installed at the center of the installation groove 204, and internal threads are provided inside the cathode end 201 and the anode end 202; It should be noted that the positioning pin 203 passes through the fourth mounting hole 702 , the first mounting hole 303 , and the fifth mounting hole 801 , and the internal threads inside the cathode end 201 and the anode end 202 can be threadedly installed with the fixing bolt 602 , so as to facilitate the fixing and installation of the fixing bolt 602 .

[0028] Further, the two side bolts at the bottom of the chassis 1 are equipped with shock absorbers 101, and the bottom bolts of the shock absorbers 101 are equipped with mounting brackets 102; It should be noted that the flexible shock absorber 101 can increase the shock absorption effect of the base frame 1, thereby ensuring the safety performance of the capacitor 2. The mounting bracket 102 facilitates the installation of the base frame 1, thereby ensuring the stable installation effect of the base frame 1.

[0029] Working principle: Before using the device, the user should first test the device and use it after confirming that there is no problem. The insulating plate 7 and the isolation plate 8 are used to increase the isolation measures. The multi-layer insulation structure is adopted to effectively increase the electrical clearance and creepage distance between the cathode busbar 3 and the anode busbar 4 of the capacitor 2 in series. The isolation plate 8 is set between the cathode busbar 3 and the anode busbar 4 to increase the redundancy of the electrical clearance and creepage distance. The cathode busbar 3 and the anode busbar 4 are isolated by the isolation plate 8 to increase the electrical clearance and creepage distance, avoid crossing and overlapping between the cathode busbar 3 and the anode busbar 4, so as to reduce electromagnetic interference and voltage fluctuations. The insulating seat 601 and the protective cap 6 can insulate and wrap the fixing bolt 602 to provide additional isolation and protection to prevent short circuit and discharge between busbars. The protective plate 5 can wrap and protect the surface of the anode busbar 4 to provide additional isolation and protection. The protective plate 5 transfers the heat generated by the conductive current of the anode busbar 4 to the heat sink 501. The heat sink 501 can increase the heat dissipation area of ​​the protective plate 5, improve the heat dissipation effect of the protective plate 5, speed up the heat dissipation efficiency of the anode busbar 4, avoid heat accumulation, and ensure the stable operation of the power system. By designing a grid conductive channel 301 on the surface of the cathode busbar 3 and the anode busbar 4, the guide end of the grid conductive channel 301 can be externally connected to a guide line, which can destroy the original discharge path of the cathode busbar 3 and the anode busbar 4, artificially guide the discharge current to flow along a predetermined path, and guide the discharge current of the cathode busbar 3 and the anode busbar 4 to the ground, thereby eliminating the discharge current, avoiding the disordered propagation and accumulation of the discharge energy on the surface of the cathode busbar 3 and the anode busbar 4, and the static electricity accumulated on the surface of the cathode busbar 3 and the anode busbar 4, thereby avoiding the discharge phenomenon; Moreover, the grid conductive channel 301 can disperse the discharge energy and transmit it along multiple paths, thereby reducing the discharge energy density on each path and reducing the damage of the discharge to the electrode; by reasonably designing the shape and layout of the grid conductive channel 301, the occurrence of surface discharge of the cathode busbar 3 and the anode busbar 4 can be effectively prevented, and the discharge performance and stability of the cathode busbar 3 and the anode busbar 4 can be improved.

[0030] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A medium-high frequency inverter power supply discharge prevention busbar structure, comprising a base frame (1) and a capacitor (2), characterized in that: A mounting plate (103) is mounted on the top of the base frame (1) by means of bolts, and the capacitor (2) is embedded and mounted inside the mounting plate (103). A mounting groove (204) is provided on the top of the capacitor (2), and a cathode terminal (201) and an anode terminal (202) are respectively mounted on both sides of the mounting groove (204). An insulating plate (7), a cathode busbar (3), an isolating plate (8), an anode busbar (4), and a protective plate (5) are respectively mounted on the top of the capacitor (2) by means of fixing bolts (602), and the insulating plate (7), the cathode busbar (3), the isolating plate (8), the anode busbar (4), and the protective plate (5) are sequentially mounted from bottom to top, and mesh conductive channels (301) are provided on the surfaces opposite to each other of the cathode busbar (3) and the anode busbar (4).

2. The anti-discharge busbar structure of a medium-high frequency inverter power supply according to claim 1 is characterized in that: The grid conductive channel (301) is made of a conductive polymer material, and cathode holes (302) are equidistantly provided inside the cathode busbar (3), and two groups of first mounting holes (303) are provided on one side of the cathode hole (302).

3. The anti-discharge busbar structure of a medium-high frequency inverter power supply according to claim 1 is characterized in that: The anode busbar (4) has second mounting holes (401) formed at equal intervals inside, and an anode hole (402) is formed on one side of the second mounting hole (401).

4. The anti-discharge busbar structure of a medium-high frequency inverter power supply according to claim 1, characterized in that: Heat sinks (501) are equidistantly mounted on the top of the protective plate (5), and a rubber strip is fixedly mounted on one side of the protective plate (5).

5. The anti-discharge busbar structure of a medium-high frequency inverter power supply according to claim 1 is characterized in that: The top of the protective plate (5) is provided with third mounting holes (502) at equal intervals, an insulating seat (601) is embedded and installed inside the third mounting hole (502), a protective cap (6) is threadedly installed on the top of the insulating seat (601), and a fixing bolt (602) is installed through the inside of the insulating seat (601).

6. The anti-discharge busbar structure of a medium-high frequency inverter power supply according to claim 1, characterized in that: The bottom of the insulating plate (7) is equidistantly provided with mounting rings (701), and the interior of the mounting ring (701) is provided with fourth mounting holes (702) equidistantly provided.

7. The anti-discharge busbar structure of a medium-high frequency inverter power supply according to claim 1 is characterized in that: Fifth mounting holes (801) are equidistantly provided inside the isolation plate (8), and isolation strips are fixedly mounted on both sides of the isolation plate (8).

8. The anti-discharge busbar structure of a medium-high frequency inverter power supply according to claim 1, characterized in that: A positioning pin (203) is fixedly installed at the center of the installation groove (204), and internal threads are provided inside the cathode end (201) and the anode end (202).

9. The anti-discharge busbar structure of a medium-high frequency inverter power supply according to claim 1, characterized in that: Shock absorbers (101) are bolted on both sides of the bottom of the base frame (1), and mounting brackets (102) are bolted on the bottom of the shock absorber (101).

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