Driver with safety protection structure

Abstract

The utility model provides a driver with a safety protection structure, which comprises a heat dissipation seat and at least two IGBT modules arranged on the heat dissipation seat side by side left and right, four corners of each IGBT module are fixed on the heat dissipation seat through module fixing screws, the rear end of each IGBT module is provided with an output end power connection terminal, and the other end of each IGBT module is provided with a safety protection structure. The output end power connection terminals on the adjacent IGBT modules are electrically connected through conductive copper bars, the conductive copper bars are fixed to the rear ends of the IGBT modules through copper bar fixing screws, the front ends of the conductive copper bars extend to the positions above the module fixing screws, the rear ends of the IGBT modules are provided with insulating parts, the front ends of the insulating parts are provided with screw cover plates used for covering the tops of the module fixing screws, and the module fixing screws are fixed on the insulating parts. The screw cover plate located on the inner side is pressed and fixed between the conductive copper bar and the module fixing screw, the two sides of the rear end of the insulating part protrude downwards to form at least two buckles, and clamping grooves for the buckles to be vertically clamped in are formed in the top of the heat dissipation base. The driver is safe and reliable, electric leakage and short circuit can be effectively prevented, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of electrical safety technology, and more specifically, to a driver with a safety protection structure. Background Technology

[0002] A driver is a device that converts DC power into AC power and is widely used in the field of power electronics. A traditional driver usually consists of a heat sink and multiple IGBT modules. The IGBT modules are fixed to the heat sink with fixing screws. In order to achieve equal current distribution among multiple IGBT modules and avoid overheating or damage to individual modules, conductive copper strips are usually used to make electrical connections at the output terminals of the IGBT modules.

[0003] However, existing technologies have some safety hazards. Due to the small gap between the conductive copper strip and the IGBT module fixing screw, in the presence of adverse environmental factors such as metal dust and humidity, the conductive copper strip can easily conduct the AC power from the output end to the heat sink through the IGBT module fixing screw, causing leakage and injury or overall short circuit and burnout.

[0004] To address this issue, existing technologies typically employ an insulating sheet inserted between the IGBT module mounting screws and the conductive copper strips to achieve electrical isolation. However, this method carries the risk of the insulating sheet easily detaching, especially under external environmental vibrations, which can easily cause the aforementioned safety problems to recur. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the prior art and provide a driver with a safety protection structure. This driver is safe and reliable, can effectively prevent leakage and short circuit, and extend its service life.

[0006] To address the aforementioned issues, this utility model provides a driver with a safety protection structure, comprising a heat sink and at least two IGBT modules arranged side-by-side on the heat sink. The four corners of the IGBT modules are fixed to the heat sink by module fixing screws. The rear end of the IGBT modules is provided with output terminals. The output terminals on adjacent IGBT modules are electrically connected by conductive copper strips. The conductive copper strips are fixed to the rear end of the IGBT modules by copper strip fixing screws. The front end of the conductive copper strips extends above the module fixing screws. The rear end of the IGBT modules is provided with an insulating component. The front end of the insulating component has a screw cover plate for covering the top of the module fixing screws. The screw cover plate located on the inner side is pressed and fixed between the conductive copper strips and the module fixing screws. The two sides of the rear end of the insulating component protrude downward to form at least two latches. The top of the heat sink is provided with a slot for the latches to be vertically engaged.

[0007] Compared with the prior art, the advantages of this utility model are as follows: This utility model uses a screw cover plate formed on the front end of the insulating component to cover the top of the module fixing screw, preventing the module fixing screw from contacting the conductive copper strip. This effectively prevents the conductive copper strip from conducting the output current to the heat sink through the module fixing screw, avoiding leakage injuries or overall short circuit burnout accidents. Simultaneously, this utility model uses the screw cover plate to press and fix between the conductive copper strip and the module fixing screw, and two clips at the rear end of the insulating component to vertically engage with the slots on the top of the heat sink, forming a three-point fixation of the insulating component. This avoids the risk of the insulating component falling off under vibration, thus preventing leakage and short circuit accidents caused by insulation failure. The structural design of this utility model ensures the safety and reliability of the driver and extends its service life.

[0008] As an improvement, extension arms extend upwards from both sides of the front end of the insulating component. A screw cover plate is integrally formed at the top of the extension arms and extends forward. A first reinforcing rib extending diagonally downwards is fixed between the extension arms and the insulating component. This structure, by forming extension arms at the front end of the insulating component and integrally forming the screw cover plate at the top of the extension arms and extending forwards, effectively avoids the obstruction of the IGBT module covering the screw cover plate, allowing the screw cover plate to completely cover the top of the module fixing screw. Simultaneously, the first reinforcing rib extending diagonally downwards is fixed between the extension arms and the insulating component, enhancing the connection strength between the screw cover plate and the insulating component body, and improving the overall stability of the structure.

[0009] As an improvement, the bottom edge of the screw cover is bent downwards to form a folded edge. The folded edge, the extension arm, and the bottom of the screw cover together form a receiving groove for the top of the module fixing screw. This technical solution, by bending the bottom edge of the screw cover downwards to form a folded edge, together with the extension arm and the bottom of the screw cover to form a receiving groove, completely encloses the top of the module fixing screw within the receiving groove. This structural design effectively prevents the screw from loosening due to vibration or external force. At the same time, the receiving groove further enhances the insulation effect between the module fixing screw and the conductive copper strip, effectively reducing the risk of leakage due to screw loosening or poor contact, and improving the safety and reliability of the driver.

[0010] As an improvement, handles are formed by extending upwards on both sides of the rear end of the insulator. A second reinforcing rib extending diagonally downwards is fixed between the handle and the insulator. The handles facilitate the assembly and replacement of the insulator, while the second reinforcing rib further enhances the structural strength of the insulator, improves its impact resistance and deformation resistance, and thus improves the overall reliability of the actuator.

[0011] As an improvement, the insulator body has a pair of openings extending forward from the rear edge, dividing the insulator body into a middle section and side sections on either side of the middle section. The length of the middle section is greater than the length of the side sections. The handle and the latch are located at the top and bottom of the rear end of the side sections, respectively. This structural design reduces the size of the side sections, increases their structural flexibility, and makes it easier for users to grip the handle and engage the latch in the slot. It also facilitates the disassembly of the insulator, improving the assembly and disassembly efficiency of the actuator.

[0012] As an improvement, the front end of the conductive copper strip is bent upwards to form a handle, and the copper strip fixing screw is fixed to the rear end of the conductive copper strip. This technical solution sets a handle at the front end of the conductive copper strip, while the copper strip fixing screw is located at the rear end. On the one hand, it avoids mutual interference between the handle and the fixing screw, and on the other hand, it simplifies the installation and removal of the conductive copper strip. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 for Figure 1 Sectional view of AA;

[0015] Figure 3 This is a perspective view of the present utility model;

[0016] Figure 4 This is an exploded view of the present invention;

[0017] Figure 5 This is the first perspective view of the insulating component in this utility model;

[0018] Figure 6 This is the second perspective view of the insulating component in this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Heat sink; 10. Slot; 2. IGBT module; 21. Module fixing screw; 3. Output terminal; 4. Conductive copper strip; 41. Copper strip fixing screw; 42. Handle; 5. Insulating component; 50. Opening; 51. Extension arm; 510. First reinforcing rib; 52. Handle; 520. Second reinforcing rib; 53. Middle section; 54. Side section; 6. Screw cover plate; 61. Folded edge; 62. Receiving groove; 7. Buckle. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] like Figures 1 to 4As shown, in this utility model, the driver with a safety protection structure includes a heat sink 1 and at least two IGBT modules 2 arranged side by side on the heat sink 1. The four corners of the IGBT modules 2 are fixed to the heat sink 1 by module fixing screws 21. The rear end of the IGBT modules 2 is provided with an output terminal 3. The output terminals 3 on adjacent IGBT modules 2 are electrically connected by conductive copper strips 4. The conductive copper strips 4 are fixed to the rear end of the IGBT modules 2 by copper strip fixing screws 41. The front end of the conductive copper strips 4 extends above the module fixing screws 21. The rear end of the IGBT modules 2 is provided with an insulating member 5. The front end of the insulating member 5 has a screw cover plate 6 for covering the top of the module fixing screws 21. The screw cover plate 6 located on the inner side is pressed and fixed between the conductive copper strips 4 and the module fixing screws 21. The two sides of the rear end of the insulating member 5 protrude downward to form at least two buckles 7. The top of the heat sink 1 is provided with a slot 10 for the buckles 7 to be vertically inserted.

[0023] This invention uses a screw cover plate 6 formed at the front end of the insulating component 5 to cover the top of the module fixing screw 21, preventing the module fixing screw 21 from contacting the conductive copper strip 4. This effectively prevents the conductive copper strip 4 from conducting the current from the output end to the heat sink 1 through the module fixing screw 21, avoiding leakage injury or overall short circuit burnout accidents. At the same time, this invention uses the screw cover plate 6 to press and fix between the conductive copper strip 4 and the module fixing screw 21, and the two buckles 7 at the rear end of the insulating component 5 to vertically engage with the slots 10 at the top of the heat sink 1, forming a three-point fixation for the insulating component 5. This avoids the hidden danger of the insulating component 5 falling off under vibration, thereby avoiding leakage and short circuit accidents caused by insulation failure. The structural design of this invention ensures the safety and reliability of the driver and extends its service life.

[0024] like Figure 5 As shown, extension arms 51 extend upward from both sides of the front end of the insulating member 5. The screw cover plate 6 is integrally formed on the top of the extension arm 51 and extends forward. A first reinforcing rib 510 extending obliquely downward from top to bottom is fixed between the extension arm 51 and the insulating member 5. This structure, by forming the extension arm 51 at the front end of the insulating member 5 and integrally forming the screw cover plate 6 on the top of the extension arm 51 and extending forward, effectively avoids the obstruction of the IGBT module 2 covering the screw cover plate 6, allowing the screw cover plate 6 to completely cover the top of the module fixing screw 21. At the same time, the first reinforcing rib 510 extending obliquely downward from top to bottom is fixed between the extension arm 51 and the insulating member 5, enhancing the connection strength between the screw cover plate 6 and the body of the insulating member 5 and improving the overall stability of the structure.

[0025] like Figure 6As shown, the bottom edge of the screw cover plate 6 is bent downwards to form a flange 61. The flange 61, the extension arm 51, and the bottom of the screw cover plate 6 together form a receiving groove 62 for placing the top of the module fixing screw 21. This technical solution forms a flange 61 by bending the bottom edge of the screw cover plate 6 downwards, which, together with the extension arm 51 and the bottom of the screw cover plate 6, forms a receiving groove 62. The top of the module fixing screw 21 is completely wrapped in the receiving groove 62. This structural design effectively prevents the screw from loosening due to vibration or external force. At the same time, the wrapping of the screw by the receiving groove 62 further enhances the insulation effect between the module fixing screw 21 and the conductive copper strip 4, effectively reducing the risk of leakage due to screw loosening or poor contact, and improving the safety and reliability of the driver.

[0026] like Figure 5 As shown, handles 52 extend upward from both sides of the rear end of the insulating component 5. A second reinforcing rib 520 extending obliquely downward from top to bottom is fixed between the handles 52 and the insulating component 5. The handles 52 facilitate the assembly and replacement of the insulating component 5, while the second reinforcing rib 520 further enhances the structural strength of the insulating component 5, improves its impact resistance and deformation resistance, and thus improves the overall reliability of the driver.

[0027] like Figure 6 As shown, the body of the insulating component 5 has a pair of openings 50 extending forward from the rear edge. The openings 50 divide the body of the insulating component 5 into a middle section 53 and side sections 54 located on both sides of the middle section 53. The length of the middle section 53 is greater than the length of the side sections 54. The handle 52 and the latch 7 are located at the top and bottom of the rear end of the side sections 54, respectively. This structural design reduces the size of the side sections 54, increases its structural flexibility, and makes it convenient for the user to hold the handle 52 and snap the latch 7 into the slot 10. At the same time, it also makes it convenient for the user to disassemble the insulating component 5, improving the assembly and disassembly efficiency of the driver.

[0028] like Figure 3 and Figure 4 As shown, the front end of the conductive copper strip 4 is bent upward to form a handle 42, and the copper strip fixing screw 41 is fixed to the rear end of the conductive copper strip 4. This technical solution provides a handle 42 at the front end of the conductive copper strip 4, while the copper strip fixing screw 41 is located at the rear end. On the one hand, this avoids mutual interference between the handle 42 and the fixing screw, and on the other hand, it simplifies the installation and disassembly of the conductive copper strip 4 through the handle 42.

[0029] Although the disclosure is as stated above, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this utility model.

Claims

1. A driver with safety protection structure, comprising a heat dissipation base (1) and at least two IGBT modules (2) arranged side by side on the heat dissipation base (1), four corners of the IGBT module (2) are fixed on the heat dissipation base (1) through a module fixing screw (21), the rear end of the IGBT module (2) is provided with an output terminal (3), the output terminals (3) on adjacent IGBT modules (2) are electrically connected through a conductive copper bar (4), the conductive copper bar (4) is fixed on the rear end of the IGBT module (2) through a copper bar fixing screw (41), and the front end of the conductive copper bar (4) extends to above the module fixing screw (21), characterized in that: The back end of the IGBT module (2) is provided with an insulating piece (5), the front end of the insulating piece (5) is provided with a screw cover plate (6) for covering the top of the module fixing screw (21), the screw cover plate (6) on the inner side is tightly fixed between the conductive copper strip (4) and the module fixing screw (21), the two sides of the back end of the insulating piece (5) are downwardly protruded to form at least two buckles (7), and the top of the heat dissipation seat (1) is provided with a clamping groove (10) for vertically clamping the buckle (7).

2. The driver with safety guard structure according to claim 1, characterized in that: The two sides of the front end of the insulating piece (5) are upwardly extended to form an extension arm (51), the screw cover plate (6) is integrally formed at the top end of the extension arm (51) and extends forward, and a first reinforcing rib (510) extending obliquely from top to bottom is fixed between the extension arm (51) and the insulating piece (5).

3. The driver with safety guard structure according to claim 2, characterized in that: The edge of the bottom of the screw cover plate (6) is downwardly bent to form a bent edge (61), the bent edge (61), the extension arm (51) and the bottom of the screw cover plate (6) jointly form an accommodating groove (62) for placing the top end of the module fixing screw (21).

4. The driver with safety guard structure according to claim 1, characterized in that: The two sides of the back end of the insulating piece (5) are upwardly extended to form a handle (52), and a second reinforcing rib (520) extending obliquely from top to bottom is fixed between the handle (52) and the insulating piece (5).

5. The driver with safety guard structure according to claim 4, characterized in that: A pair of openings (50) extending forward from the back end edge are formed in the body of the insulating piece (5), the openings (50) divide the body of the insulating piece (5) into a middle section (53) and side sections (54) located on both sides of the middle section (53), the length of the middle section (53) is greater than that of the side sections (54), and the handle (52) and the buckle (7) are arranged on the top and bottom of the back end of the side sections (54).

6. The driver with safety guard structure according to claim 2, characterized in that: The front end of the conductive copper strip (4) is upwardly bent to form a handle (42), and the copper strip fixing screw (41) is fixed at the back end of the conductive copper strip (4).

Images