Tabbed IGBT snubber capacitor

Abstract

The utility model relates to IGBT absorption capacitor technical field especially is a kind of lug formula IGBT absorption capacitor, including shell, capacitor core, heat dissipation subassembly and adjusting assembly, the middle part of shell is equipped with accommodating space, adjusting assembly includes movable stage and adjusting bolt, the bottom surface of accommodating space is equipped with thickening area, the top surface of thickening area is all set up movable slot in two ends, movable stage is set in movable slot, adjusting bolt and movable stage carry out thread cooperation, the position of mounting port close to movable slot is equipped with connecting piece, the end close to movable stage of connecting piece is set up with matched socket, the top surface of movable stage is equipped with the limit lug block matched with matched socket, the top surface of limit lug block is equipped with barrier baffle, after welding connection of connecting piece and capacitor core, the matched socket on connecting piece is aligned with limit lug block, the alignment of barrier baffle can limit connecting piece, prevent the situation that connecting piece appears to rise, guarantee the stability of installation and finished product quality.

Description

Technical Field

[0001] This utility model relates to the field of IGBT absorption capacitor technology, and in particular to a terminal block type IGBT absorption capacitor. Background Technology

[0002] IGBT snubber capacitors are critical passive components specifically designed to suppress voltage spikes and oscillations generated during the switching process of power semiconductor devices (such as IGBTs and MOSFETs). They protect power devices and improve system reliability by rapidly absorbing transient switching energy, and are widely used in power electronic devices such as frequency converters, inverters, and power supplies.

[0003] In existing IGBT snubber capacitors, the connecting tabs used to provide the connection effect are only limited by a limiting plate located on the outside of the housing opening during installation. Furthermore, because the connecting tabs on the inside of the housing are welded to the capacitor core during installation, the connecting tabs on the inside of the housing tend to lift the connecting tabs on the outside of the housing. This results in unstable installation of the connecting tabs when filling with epoxy resin, causing the connecting tabs to tilt upwards, affecting the quality of the finished product. Therefore, the inventors have proposed a connecting tab type IGBT snubber capacitor to solve the aforementioned technical problems. Utility Model Content

[0004] The purpose of this utility model is achieved through the following method: A terminal block type IGBT absorption capacitor includes a housing, a capacitor core, a heat dissipation assembly, and an adjustment assembly. The housing has a receiving space in the middle, and the capacitor core is installed within the receiving space. A mounting port is provided on one side of the outer surface of the housing, extending conductively towards the receiving space. The adjustment assembly includes a movable platform and an adjustment bolt. The bottom surface of the receiving space has a thickened area, and both ends of the top surface of the thickened area have movable slots. The movable platform is movably disposed within the movable slots. The adjustment bolt is rotatably mounted on the outer surface of the housing near... The position of the movable slot is such that the screw of the adjusting bolt extends through the housing towards the movable slot away from the adjusting bolt end, and is rotatably connected to the movable slot. The control bolt has a smooth rod position near the housing, which is rotatably connected to the housing. The adjusting bolt is threaded into the movable table. The mounting port has a connecting piece near the movable slot, and the end of the connecting piece near the movable table has a mating socket. The top surface of the movable table has a limiting protrusion that matches the mating socket. The top surface of the limiting protrusion has a blocking baffle, one side of which extends towards the center of the top surface of the thickened area.

[0005] In the above description, as a further embodiment, the connecting piece is provided with welding ends on both sides, the welding ends extend toward the top surface of the accommodating space, the top of the welding ends are welded to both sides of the capacitor core, and one end of the bottom surface of the capacitor core is attached to the top surface of the barrier plate; the welding ends are used to weld with the capacitor core to achieve conductivity.

[0006] In the above description, as a further embodiment, a support platform is provided at the end of the top surface of the thickened area near the mounting opening and at the end of the top surface of the thickened area away from the connecting piece. The top surface of the support platform is in contact with the bottom surface of the capacitor core. The support platform is used to limit the position of the connecting piece and also to facilitate the support of the capacitor core.

[0007] In a further embodiment of the above description, the end of the connecting piece away from the mating socket is provided with a bent piece, which extends toward the bottom surface of the housing. A fixing piece is provided at the bottom of the bent piece, and an elongated hole is provided in the middle of the top surface of the fixing piece, which extends through the bottom surface of the fixing piece. The elongated hole is used to provide the installation function of the connecting piece.

[0008] In a further embodiment of the above description, the heat dissipation assembly is installed on the top of the housing. The heat dissipation assembly includes a thermally conductive copper plate and heat dissipation fins. The heat dissipation fins are installed on the top surface of the housing, and the thermally conductive copper plate is installed on the top surface of the accommodating space near the heat dissipation fins. The bottom surface of the thermally conductive copper plate is in contact with the top surface of the capacitor core. The thermally conductive copper plate and heat dissipation fins are used to enhance the heat dissipation effect.

[0009] In a further embodiment of the above description, the top surface of the housing is provided with a mounting groove near the heat dissipation fins, and the top surface of the mounting groove is provided with flow holes that extend through the top surface of the heat-conducting copper plate; the flow holes are used to enhance the heat flow effect.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting up the movable platform and adjusting bolts, during installation, the operator can weld the connecting piece to the capacitor core, align the mating socket on the connecting piece with the limiting protrusion, and at the same time, the blocking partition will limit the connecting piece to prevent it from tilting up, thus ensuring the stability of the installation and the quality of the finished product. At the same time, the operator can rotate the control bolt to move the movable platform in the movable groove, adjust the distance between the limiting protrusion and the installation port, and thus control the length of the connecting piece outside the housing. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural schematic diagram of a terminal block type IGBT absorption capacitor according to this utility model;

[0012] Figure 2This is a three-dimensional structural schematic diagram of a terminal block type IGBT absorption capacitor according to this utility model from another perspective.

[0013] Figure 3 This is an exploded structural diagram of a terminal block type IGBT absorption capacitor according to this utility model.

[0014] Figure 4 This is a cross-sectional view of a terminal block type IGBT absorption capacitor according to this utility model;

[0015] Figure 5 This is a utility model Figure 3 A partially enlarged schematic diagram of structure A in the middle;

[0016] In the diagram: 1-shell, 2-capacitor core, 3-accommodating space, 4-mounting port, 5-movable platform;

[0017] 6-Adjusting bolt, 7-Thickened area, 8-Modular groove, 9-Smooth rod position, 10-Connecting piece, 11-Matching socket;

[0018] 12-Limiting protrusion, 13-Blocking baffle, 14-Welding end, 15-Supporting platform, 16-Bending piece;

[0019] 17-Fixing plate, 18-Octagonal hole, 19-Heat-conducting copper plate, 20-Heat dissipation fins, 21-Mounting slot;

[0020] 22-Flow hole. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] For this embodiment, please refer to Figures 1-5The present invention relates to a type of IGBT absorption capacitor with a terminal block, comprising a housing 1, a capacitor core 2, a heat dissipation assembly, and an adjustment assembly. The housing 1 has a receiving space 3 in the middle, and the capacitor core 2 is installed within the receiving space 3. A mounting port 4 is provided on one side of the outer surface of the housing 1, extending conductively towards the receiving space 3. The adjustment assembly includes a movable platform 5 and an adjustment bolt 6. The bottom surface of the receiving space 3 has a thickened area 7, and both ends of the top surface of the thickened area 7 have movable grooves 8. The movable platform 5 is movably disposed within the movable grooves 8. The adjustment bolt 6 is rotatably mounted on the outer surface of the housing 1 near the movable grooves 8. The screw of bolt 6 extends through the housing 1 toward the movable groove 8 away from the end of the adjusting bolt 6 and is rotatably connected to the movable groove 8. The control bolt is provided with a smooth rod position 9 near the housing 1, and the smooth rod position 9 is rotatably connected to the housing 1. The adjusting bolt 6 is threadedly engaged with the movable platform 5. The mounting port 4 is provided with a connecting piece 10 near the movable groove 8. The end of the connecting piece 10 near the movable platform 5 is provided with a mating socket 11. The top surface of the movable platform 5 is provided with a limiting protrusion 12 that matches the mating socket 11. The top surface of the limiting protrusion 12 is provided with a blocking baffle 13. One side of the blocking baffle 13 extends toward the middle of the top surface of the thickened area 7.

[0023] It should be noted that this application does not limit the structure of the capacitor core 2. The capacitor core 2 adopts the conventional model used in IGBT absorption capacitors on the market. No specific restrictions are imposed here. The attached drawings are only for illustration and are not intended to limit the effect. Those skilled in the art should be able to make reasonable selections and designs according to the actual situation.

[0024] The connecting piece 10 has welding ends 14 on both sides, which extend toward the top surface of the accommodating space 3. The top of the welding end 14 is welded to both sides of the capacitor core 2, and one end of the bottom surface of the capacitor core 2 is attached to the top surface of the barrier plate.

[0025] The thickened area 7 has a support platform 15 at the middle of its top surface near the mounting port 4 and at the middle of its top surface away from the connecting piece 10. The top surface of the support platform 15 is in contact with the bottom surface of the capacitor core 2.

[0026] The connecting piece 10 has a bent piece 16 at one end away from the mating socket 11. The bent piece 16 extends toward the bottom surface of the housing 1. A fixing piece 17 is provided at the bottom of the bent piece 16. An elongated hole 18 is opened in the middle of the top surface of the fixing piece 17. The elongated hole 18 extends through the bottom surface of the fixing piece 17.

[0027] The heat dissipation assembly is installed on the top of the housing 1. The heat dissipation assembly includes a thermally conductive copper plate 19 and heat dissipation fins 20. The heat dissipation fins 20 are installed on the top surface of the housing 1. The thermally conductive copper plate 19 is installed on the top surface of the accommodating space 3 near the heat dissipation fins 20, and the bottom surface of the thermally conductive copper plate 19 is in contact with the top surface of the capacitor core 2.

[0028] The top surface of the housing 1 is provided with a mounting groove 21 near the heat dissipation fins 20. The top surface of the mounting groove 21 is provided with flow holes 22, which extend through the top surface of the heat-conducting copper plate 19.

[0029] The installation process of this utility model is as follows: During assembly, after welding the welding end 14 to the capacitor core 2, the capacitor core 2 is placed in the accommodating space 3. At the same time, the mating socket 11 on the connecting piece 10 is aligned with the limiting protrusion 12. Then, the control bolt can be rotated. The control bolt drives the screw and then drives the movable table 5 to move in the movable groove 8, thereby adjusting the distance between the fixing piece 17 and the mounting port 4.

[0030] Then, the heat-conducting copper plate 19 is fixedly installed on the top surface of the receiving space 3, and the heat dissipation fins 20 are fixed in the mounting groove 21. Finally, epoxy resin is poured into the receiving space 3 to complete the assembly.

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Furthermore, in the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] Finally, it should be noted that the above embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model. These modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A terminal block type IGBT snubber capacitor, comprising a housing, a capacitor core, a heat dissipation assembly, and an adjustment assembly, wherein the housing has a receiving space in the middle, the capacitor core is installed in the receiving space, and a mounting port is provided on one side of the outer side of the housing, the mounting port extending conductively toward the receiving space, characterized in that: The adjustment assembly includes a movable platform and an adjustment bolt. The bottom surface of the accommodating space has a thickened area, and both ends of the top surface of the thickened area have movable grooves. The movable platform is movably disposed within the movable grooves. The adjustment bolt is rotatably mounted on the outer side of the housing near the movable groove. The screw of the adjustment bolt passes through the housing and extends towards the movable groove in a direction away from the adjustment bolt end, and is rotatably connected to the movable groove. The control bolt has a smooth rod position near the housing, which is rotatably connected to the housing. The adjustment bolt and the movable platform are threaded together. The mounting port has a connecting piece near the movable groove, and the end of the connecting piece near the movable platform has a mating socket. The top surface of the movable platform has a limiting protrusion that matches the mating socket. The top surface of the limiting protrusion has a blocking baffle, one side of which extends towards the center of the top surface of the thickened area.

2. The IGBT snubber capacitor with a terminal block as described in claim 1, characterized in that: The connecting piece has welding ends on both sides, which extend toward the top surface of the accommodating space. The top of the welding end is welded to both sides of the capacitor core, and one end of the bottom surface of the capacitor core is attached to the top surface of the barrier plate.

3. A terminal block type IGBT absorption capacitor according to claim 2, characterized in that: The thickened area has a support platform at the middle of the top surface near the mounting port and at the middle of the top surface away from the connecting piece. The top surface of the support platform is in contact with the bottom surface of the capacitor core.

4. A terminal block type IGBT snubber capacitor according to claim 1, characterized in that: The connecting piece has a bent piece at the end away from the mating socket. The bent piece extends toward the bottom surface of the housing. A fixing piece is provided at the bottom of the bent piece. An elongated hole is opened in the middle of the top surface of the fixing piece. The elongated hole extends through the bottom surface of the fixing piece.

5. A terminal block type IGBT snubber capacitor according to claim 1, characterized in that: The heat dissipation assembly is installed on the top of the housing. The heat dissipation assembly includes a thermally conductive copper plate and heat dissipation fins. The heat dissipation fins are installed on the top surface of the housing, and the thermally conductive copper plate is installed on the top surface of the accommodating space near the heat dissipation fins. The bottom surface of the thermally conductive copper plate is in contact with the top surface of the capacitor core.

6. A terminal block type IGBT snubber capacitor according to claim 5, characterized in that: The top surface of the housing is provided with a mounting groove near the heat dissipation fins. The top surface of the mounting groove is provided with flow holes that extend through the top surface of the heat-conducting copper plate.

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