Water-cooled IGBT (Insulated Gate Bipolar Translator) type power unit

Abstract

The utility model belongs to the technical field of IGBT type power units, and particularly relates to a water-cooled IGBT type power unit which comprises a stainless steel frame, the bottom end of the stainless steel frame is provided with a capacitor bolt mounting hole and a whole machine fixing hole, the front end and the rear end of the stainless steel frame are connected with a front panel and a rear panel through bolts, and the capacitor bolt mounting hole and the whole machine fixing hole are arranged in the stainless steel frame. A laminated busbar, a substrate, a water cooling plate, a water cooling support and a gold film capacitor are arranged in the stainless steel frame, copper bars are connected to the front end and the rear end of the substrate, and a guide rail and a capacitor mounting plate are mounted in the stainless steel frame. According to the utility model, through the cooperation of the water nozzles and the water cooling plate, after the water nozzles are connected with an external water pipe, water flows in from one of the water nozzles and then flows back to the other water nozzle after entering the water cooling plate, so that the water cooling plate drives heat on the substrate through water flow, thereby playing a role in facilitating heat dissipation.

Description

Technical Field

[0001] This utility model belongs to the technical field of IGBT power unit, specifically relating to a water-cooled IGBT power unit. Background Technology

[0002] IGBT power cells are core components commonly used in power electronics. When a forward voltage is applied to the gate of an IGBT, a channel is formed, creating a conductive path between the P-type and N-type semiconductors, allowing current to flow from the collector to the emitter; in this state, the IGBT is on. When the gate voltage is zero, the channel disappears, current cannot flow, and the IGBT is off. By controlling the gate voltage and pulse width, the on and off states of the IGBT can be precisely controlled, thereby achieving power regulation and control.

[0003] In the use of IGBT-type power units, the IGBTs are in a conducting state, which generates heat. This heat is trapped within the frame or at the bottom of the IGBT. If this heat is not dissipated, it will affect the operation of the IGBTs and cause thermal damage. This will further reduce the durability of the IGBT-type power unit. Utility Model Content

[0004] The purpose of this invention is to provide a water-cooled IGBT power unit, aiming to solve the problem in existing IGBT power units where, during operation, the IGBT is in a conducting state, generating heat that is trapped within the frame or at the bottom of the IGBT. If this heat is not dissipated, it can affect the IGBT's performance, causing thermal damage and reducing the durability of the IGBT power unit.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a water-cooled IGBT power unit, comprising a stainless steel frame, wherein the bottom end of the stainless steel frame is provided with capacitor bolt mounting holes and a whole unit fixing hole, the front and rear ends of the stainless steel frame are connected to a front panel and a rear panel by bolts, the interior of the stainless steel frame is provided with a stacked busbar, a substrate, a water-cooling plate, a water-cooling bracket and a gold film capacitor, the front and rear ends of the substrate are connected to copper busbars, and the interior of the stainless steel frame is equipped with a guide rail and a capacitor mounting plate.

[0006] As a preferred embodiment of the water-cooled IGBT power unit of this utility model, the front panel is made of SCM insulating material and the rear panel is made of stainless steel.

[0007] As a preferred embodiment of the water-cooled IGBT power unit of this utility model, the front panel and the rear panel are provided with openings for the copper busbars to be removed.

[0008] As a preferred embodiment of the water-cooled IGBT power unit of this utility model, the stacked busbar is connected to the substrate and the gold film capacitor. The substrate is laid on the top of the water-cooling plate. Two symmetrical water nozzles penetrate the surface of the rear panel and are connected to the rear end of the water-cooling plate.

[0009] As a preferred embodiment of the water-cooled IGBT power unit of this utility model, a dust cover is installed on the side wall of the stainless steel frame, a threaded rod is installed inside the dust cover, a threaded sleeve is threadedly connected to the surface of the threaded rod, a scraper is connected to the bottom end of the threaded sleeve, and a groove is formed at the bottom end of the dust cover.

[0010] As a preferred embodiment of the water-cooled IGBT power unit of this utility model, the threaded rod can be rotatably connected to the dust cover via a bearing.

[0011] In a preferred embodiment of the water-cooled IGBT power unit of this utility model, the top end of the threaded sleeve is fitted with the bottom end inside the dust cover, and the scraper can be detachably and fixedly connected to the threaded sleeve by bolts.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] By combining the water nozzle with the water cooling plate, after the water nozzle is connected to the external water pipe, water flows in from one of the water nozzles, then enters the water cooling plate and flows back to the other water nozzle. In this way, the water cooling plate uses the water flow to drive the heat on the substrate, thereby facilitating heat dissipation.

[0014] The dust cover, threaded rod, threaded sleeve, and scraper work together to remove dust adsorbed on the dust cover, preventing dust from affecting heat dissipation and thus improving heat dissipation efficiency. The dust scraped off by the scraper then falls out of the grooves, preventing dust residue from remaining inside the dust cover. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0017] Figure 2 This is a top view of the main structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the front cross-sectional structure of the main body of this utility model;

[0019] Figure 4 This is a schematic diagram of the rear cross-sectional structure of the main body of this utility model;

[0020] Figure 5 This is a schematic diagram of the stainless steel frame structure of this utility model;

[0021] Figure 6 This is a cross-sectional view of the dust cover structure of this utility model.

[0022] In the diagram: 1. Stainless steel frame; 2. Capacitor bolt mounting holes; 3. Unit mounting holes; 4. Front panel; 5. Rear panel; 6. Laminated busbar; 7. Substrate; 8. Water-cooled plate; 9. Water-cooled bracket; 10. Gold film capacitor; 11. Guide rail; 12. Capacitor mounting plate; 13. Dust cover; 14. Threaded rod; 15. Threaded sleeve; 16. Scraper; 17. Groove; 18. Copper busbar. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-6 The present invention provides the following technical solution: a water-cooled IGBT power unit, including a stainless steel frame 1, with capacitor bolt mounting holes 2 and a whole unit fixing hole 3 at the bottom end of the stainless steel frame 1, the front and rear ends of the stainless steel frame 1 are connected by bolts to a front panel 4 and a rear panel 5, the inside of the stainless steel frame 1 is provided with a stacked busbar 6, a substrate 7, a water-cooling plate 8, a water-cooling bracket 9 and a gold film capacitor 10, the front and rear ends of the substrate 7 are connected to copper busbars 18, and the inside of the stainless steel frame 1 is installed with a guide rail 11 and a capacitor mounting plate 12.

[0025] Preferred design: Front panel 4 is made of SCM insulating material, and rear panel 5 is made of stainless steel.

[0026] Preferably, the front panel 4 and the rear panel 5 have openings for the copper busbar 18 to be removed.

[0027] Preferably, the stacked busbar 6 is connected to the substrate 7 and the gold film capacitor 10. The substrate 7 is laid on the top of the water-cooled plate 8. Two symmetrical water nozzles are penetrated through the surface of the rear panel 5, and the water nozzles are connected to the rear end of the water-cooled plate 8.

[0028] In practical use, the stainless steel frame 1 is made of stainless steel through bending and welding. The top is open, allowing for the addition of a transparent acrylic plate, or it can remain open. The bottom has capacitor bolt mounting holes 2 and overall mounting holes 3. The front panel 4 and rear panel 5 are mounted on the stainless steel frame 1 with screws. Copper busbars 18 pass through the front panel 4 and the rear panel 5, respectively connecting to the overall busbar. The stainless steel frame 1 contains one water-cooled plate 8, six substrates 7 (each substrate 7 including IGBTs and driver boards), one stacked busbar, twelve gold-film capacitors 10, and the copper busbars 18. The copper busbars 18 consist of output and input copper busbars. The substrates 7 are then laid parallel to the water-cooled plate 8 and connected to external water pipes via water nozzles, allowing heat to be dissipated through water cooling. The stacked busbars 6 connect the gold-film capacitors 10 to each other; the gold-film capacitors 10 have AC input and DC output. The front panel 4 is made of SCM insulating material, and the color can be a single color or a two-color splicing; the rear panel 5 is made of stainless steel, with pre-drilled holes at the bottom for connection with the main unit, and together with the main unit fixing holes 3 at the bottom of the stainless steel frame 1, the module is fixed to the main unit. The water-cooling plate 8 is fixed to the water-cooling bracket 9 with screws, and the water-cooling plate 8 is inserted into the water-cooling bracket 9 through the front end of the stainless steel frame 1; the gold film capacitor 10 is inserted through the rear end of the stainless steel frame 1. First, the capacitor mounting plate 12 is pulled out along the guide rail 11, and the gold film capacitor 10 is placed on the capacitor mounting plate 12 in sequence, with the bottom mounting nuts pre-fixed. Then, the gold film capacitor 10 and the capacitor mounting plate 12 are pushed back into the stainless steel frame 1. Then, the top of the gold film capacitor 10 is fixed to the stacked busbar 6, and finally, the bottom of the gold film capacitor 10 is fixed through the capacitor bolt mounting holes 2.

[0029] Preferably, a dust cover 13 is installed on the side wall of the stainless steel frame 1, a threaded rod 14 is installed inside the dust cover 13, a threaded sleeve 15 is threadedly connected to the surface of the threaded rod 14, a scraper 16 is connected to the bottom end of the threaded sleeve 15, a groove 17 is opened at the bottom end of the dust cover 13, the threaded rod 14 can be rotatably connected to the dust cover 13 through a bearing, the top end of the threaded sleeve 15 fits against the bottom end inside the dust cover 13, and the scraper 16 can be detachably and fixedly connected to the threaded sleeve 15 through bolts.

[0030] In actual use, the threaded rod 14 is rotated manually, and the threaded rod 14 rotates stably along the inner ring of the bearing. Then, the threaded sleeve 15 moves along the thread on the surface of the threaded rod 14. In turn, the threaded sleeve 15 drives the scraper 16 to move. The movement of the scraper 16 scrapes off the dust attached to the inner wall of the dust cover 13. Then the dust falls from the groove 17 to the outside of the dust cover 13.

[0031] Working principle: Through the cooperation of the water nozzle and the water-cooled plate 8, after the water nozzle is connected to the external water pipe, water flows in from one of the water nozzles, then enters the water-cooled plate 8 and flows back to the other water nozzle. In this way, the water-cooled plate 8 drives the heat on the substrate 7 through the water flow, thereby facilitating heat dissipation.

[0032] In addition, the system is equipped with a dust cover 13 and a cleaning device. By manually rotating the threaded rod 14, the threaded rod 14 rotates stably along the inner ring of the bearing, driving the threaded sleeve 15 to move along the threads on the surface of the threaded rod 14. The threaded sleeve 15 then drives the scraper 16 to move, and the scraper 16 scrapes off the adhering dust on the inner wall of the dust cover 13. The dust then falls from the groove 17 to the outside of the dust cover 13, keeping the system clean and operating stably.

[0033] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A water-cooled IGBT power unit, comprising a stainless steel frame (1), characterized in that: The bottom end of the stainless steel frame (1) is provided with capacitor bolt mounting holes (2) and machine fixing holes (3). The front and rear ends of the stainless steel frame (1) are connected by bolts to the front panel (4) and the rear panel (5). The interior of the stainless steel frame (1) is provided with stacked busbars (6), substrate (7), water cooling plate (8), water cooling bracket (9) and gold film capacitor (10). The front and rear ends of the substrate (7) are connected to copper busbars (18), and the stainless steel frame (1) is equipped with guide rails (11) and capacitor mounting plates (12).

2. The water-cooled IGBT power unit according to claim 1, characterized in that: The front panel (4) is made of SCM insulating material, and the rear panel (5) is made of stainless steel.

3. The water-cooled IGBT power unit according to claim 1, characterized in that: The front panel (4) and the rear panel (5) have openings for the copper busbar (18) to be removed.

4. A water-cooled IGBT power unit according to claim 1, characterized in that: The stacked busbar (6) is connected to the substrate (7) and the gold film capacitor (10). The substrate (7) is laid on the top of the water-cooled plate (8). Two symmetrical water nozzles are penetrated through the surface of the rear panel (5). The water nozzles are connected to the rear end of the water-cooled plate (8).

5. A water-cooled IGBT power unit according to claim 1, characterized in that: The stainless steel frame (1) is equipped with a dust cover (13) on its side wall. A threaded rod (14) is installed inside the dust cover (13). A threaded sleeve (15) is threadedly connected to the surface of the threaded rod (14). A scraper (16) is connected to the bottom end of the threaded sleeve (15). A groove (17) is provided at the bottom end of the dust cover (13).

6. A water-cooled IGBT power unit according to claim 5, characterized in that: The threaded rod (14) can be rotatably connected to the dust cover (13) via a bearing.

7. A water-cooled IGBT power unit according to claim 5, characterized in that: The top end of the threaded sleeve (15) is fitted with the bottom end inside the dust cover (13), and the scraper (16) can be detachably and fixedly connected to the threaded sleeve (15) by bolts.

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