IGBT (Insulated Gate Bipolar Translator)-based chopper

Abstract

The utility model discloses a chopper based on IGBT, and relates to the technical field of chopper, the chopper comprises a support shell, an adsorption heat dissipation mechanism is fixedly installed on the inner wall of the support shell, the adsorption heat dissipation mechanism comprises a first motor fixedly installed on the inner wall of the support shell, the driving end of the first motor is fixedly provided with an impeller disc, and the impeller disc is fixedly installed on the inner wall of the support shell. Impeller blades are fixedly mounted at the end of the side wall, away from the first motor, of the impeller disc, an impeller seat is rotatably mounted at the ends, away from the impeller disc, of the impeller blades, and a sealing ring is fixedly mounted on the side wall of the impeller seat. According to the utility model, the impeller disc and the impeller blades are driven by the motor I to rotate to generate airflow, and the design of the negative pressure holes is utilized, so that the air gap or heat bridge effect between the heat conducting plate and the heat dissipation plate is effectively reduced, the heat resistance is reduced, the heat transfer efficiency is improved, and the generation of vibration and noise is reduced; and the overall performance of the equipment and the user experience are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a chopper technology field, concretely is a kind of chopper based on IGBT. BACKGROUND

[0002] In the field of power electronic equipment, the chopper based on IGBT (Insulated Gate Bipolar Transistor) plays a vital role. As the core component of the chopper, IGBT generates a large amount of heat during operation. In order to ensure the normal operation of IGBT and prolong its service life, effective heat dissipation design is essential.

[0003] Currently, the common chopper heat dissipation structure on the market mostly adopts the method of placing the heat dissipation device directly in the heating area of IGBT. This design aims to rapidly transfer heat from the heating element to the heat dissipation device by increasing the heat dissipation area and optimizing the heat dissipation path. Then, a heat dissipation fan is installed outside the heat dissipation device to accelerate the dissipation of heat into the air using the airflow generated by the fan, thereby achieving the cooling effect.

[0004] The existing heat dissipation fan is mostly installed in suspension, without closely adhering to the heat dissipation device. This installation method causes the heat on the heat dissipation device to be unable to be completely absorbed and carried away by the fan, and part of the heat still remains in the heat dissipation device and the surrounding environment, affecting the heat dissipation efficiency. In addition, the suspended fan may also produce vibration and noise during operation, further reducing the overall performance of the equipment and user experience.

[0005] Therefore, the present application is proposed. UTILITY MODEL CONTENTS

[0006] The utility model aims to provide a kind of chopper based on IGBT to solve the problems raised in the above background.

[0007] To solve the above technical problems, the utility model provides a kind of chopper based on IGBT, including support shell, fixed mounting adsorption heat dissipation mechanism in support shell inner wall;

[0008] The adsorption heat dissipation mechanism includes a motor fixedly installed on the inner wall of the support shell, a impeller disc is fixedly installed on the driving end of the motor, a impeller blade is fixedly installed on the side wall end of the impeller disc away from the motor, a impeller seat is rotatably installed on one end of the impeller blade away from the impeller disc, a sealing ring is fixedly installed on the side wall of the impeller seat, a connecting ring is fixedly installed on the outer wall of the impeller seat, a heat conduction plate is fixedly installed on the side wall of the connecting ring away from the impeller seat, and a negative pressure hole is formed in the inner wall center of the heat conduction plate.

[0009] Further, a heat dissipation plate is threadedly connected to the side wall of the heat conduction plate, a heat dissipation fin is slidably installed in the inner wall of the heat dissipation plate, and a spacing adjusting mechanism is fixedly installed on the outer wall of the heat dissipation fin.

[0010] The spacing adjusting mechanism comprises a fixed column fixedly installed on the outer wall of the heat dissipation fin, a connecting rod two is rotatably installed on the outer wall of the fixed column, a connecting rod one is rotatably installed on the end of the connecting rod two away from the fixed column, the end of the connecting rod one away from the connecting rod two is fixedly installed on the driving end of the motor two, a connecting rod three is rotatably installed on the outer wall of the motor two, a connecting rod four is rotatably installed on the side end of the connecting rod three, and the end of the connecting rod four away from the rotating shaft one is rotatably installed on the outer wall of the fixed column.

[0011] Further, a limiting plate is fixedly installed on the bottom of the motor two, a sliding groove is formed in the inner wall of the limiting plate, and a sliding block is slidably installed in the inner wall of the sliding groove and fixedly connected with the fixed column.

[0012] Further, a fixed ring is fixedly installed on the outer wall of the impeller seat, and the side wall of the fixed ring is fixedly connected with the side wall of the connecting ring.

[0013] Further, a heat dissipation groove is formed in the side wall of the supporting shell, and the heat dissipation grooves are uniformly distributed in the side wall of the supporting shell.

[0014] Further, a connecting groove is formed in the inner wall of the heat dissipation plate, a connecting plate is slidably installed in the inner wall of the connecting groove, and the side wall of the connecting plate is fixedly connected with the heat dissipation fin.

[0015] Further, a bolt is threadedly installed on the side end of the heat conduction plate, and the outer wall of the bolt is threadedly connected with the heat dissipation plate.

[0016] Further, a rotating shaft two is rotatably installed at the connecting position of the connecting rod one and the connecting rod two, and a rotating shaft one is rotatably installed at the connecting position of the connecting rod three and the connecting rod four.

[0017] Further, a heat conduction bin is fixedly installed on the outer wall of the heat dissipation plate, and a chopper is fixedly installed on the end of the heat dissipation plate away from the heat dissipation fin.

[0018] Compared with the prior art, the beneficial effects of the utility model are that: through the rotation of the impeller disc and the impeller blade driven by the motor one, air flow is generated, and through the design of the negative pressure hole, the air gap or thermal bridge effect between the heat conduction plate and the heat dissipation plate is effectively reduced, the thermal resistance is reduced, the heat transfer efficiency is improved, the vibration and noise generation are reduced, and the overall performance and user experience of the equipment are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is an explosion structure schematic view of an adsorption heat dissipation mechanism of an IGBT-based chopper;

[0020] Figure 2 It is a front structure schematic view of an IGBT-based chopper;

[0021] Figure 3It is a schematic view of the internal structure of a heat-conducting bin of an IGBT-based chopper;

[0022] Figure 4 It is a schematic view of the enlarged structure of a pitch adjusting mechanism of an IGBT-based chopper;

[0023] Figure 5 It is Figure 4 It is a schematic view of the enlarged structure at A in the middle.

[0024] In the figure: 1, chopper; 2, heat-conducting bin; 3, heat-conducting plate; 4, bolt; 5, support shell; 6, motor one; 7, heat dissipation groove; 8, impeller disc; 9, impeller blade; 10, fixed ring; 11, impeller seat; 12, sealing ring; 13, connecting ring; 14, negative pressure hole; 15, heat dissipation plate; 16, connecting groove; 17, heat dissipation fin; 18, limiting plate; 19, motor two; 20, connecting rod one; 21, connecting rod two; 22, connecting rod three; 23, connecting rod four; 24, rotating shaft one; 25, rotating shaft two; 26, fixed column; 27, connecting plate; 28, sliding block; 29, sliding groove. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] Please refer to Figure 1 - Figure 5 The present application provides a technical solution: an IGBT-based chopper, comprising a support shell 5, and an adsorption heat dissipation mechanism is fixedly installed on the inner wall of the support shell 5.

[0027] The adsorption heat dissipation mechanism comprises a motor one 6 fixedly installed on the inner wall of the support shell 5, a driving end of the motor one 6 is fixedly installed with an impeller disc 8, a side wall end of the impeller disc 8 away from the motor one 6 is fixedly installed with an impeller blade 9, one end of the impeller blade 9 away from the impeller disc 8 is rotatably installed with an impeller seat 11, a side wall of the impeller seat 11 is fixedly installed with a sealing ring 12, an outer wall of the impeller seat 11 is fixedly installed with a connecting ring 13, a side wall of the connecting ring 13 away from the impeller seat 11 is fixedly installed with a heat-conducting plate 3, and a negative pressure hole 14 is formed in the center of the inner wall of the heat-conducting plate 3.

[0028] It should be noted that: motor 6 drive end fixed connection impeller disc 8, provide rotating power, impeller disc 8 with motor 6 rotates, drives impeller blade 9 together rotates, impeller blade 9 rotates under the drive of impeller disc 8 and generates airflow, connecting ring 13 is fixedly installed on the outer wall of impeller seat 11, connected with heat conduction plate 3, connecting ring 13 guides the airflow to the negative pressure hole 14 on the inner wall of heat conduction plate 3.

[0029] Further, the continuous action of negative pressure makes it difficult to produce air gap or thermal bridge effect between the heat conduction plate 3 and the heat sink 15, reduces the thermal resistance, so that the heat can be transmitted from the heat generating element to the heat dissipation system more quickly, and finally dissipated to the air.

[0030] Please refer to Figure 2 - Figure 4 The utility model provides a kind of technical scheme: a chopper based on IGBT, heat dissipation plate 15 is screw-connected on the side wall of heat conduction plate 3, heat dissipation fin 17 is slidably installed on the inner wall of heat dissipation plate 15, spacing adjustment mechanism is fixedly installed on the outer wall of heat dissipation fin 17.

[0031] Spacing adjustment mechanism includes fixedly installed fixed column 26 on the outer wall of heat dissipation fin 17, connecting rod two 21 is rotatably installed on the outer wall of fixed column 26, connecting rod one 20 is rotatably installed on the end of connecting rod two 21 away from fixed column 26, connecting rod one 20 is fixedly installed on the drive end of motor two 19 on the end of connecting rod two 21 away from, connecting rod three 22 is rotatably installed on the outer wall of motor two 19, connecting rod four 23 is rotatably installed on the outer wall of fixed column 26 on the end of connecting rod three 22 away from rotating shaft one 24.

[0032] It should be noted that: after motor two 19 starts, through the linkage action of connecting rod one 20, connecting rod two 21, connecting rod three 22 and connecting rod four 23, and the rotation of rotating shaft two 25 and rotating shaft one 24, drive fixed column 26 and heat dissipation fin 17 to move, the sliding of sliding block 28 in sliding groove 29 ensures the stability of heat dissipation fin 17 movement, at the same time, by adjusting the spacing between heat dissipation fin 17, air flow can be optimized, and heat dissipation efficiency can be improved.

[0033] Please refer to Figure 3 、 Figure 4 The utility model provides a kind of technical scheme: a chopper based on IGBT, limit plate 18 is fixedly installed on the bottom of motor two 19, sliding groove 29 is formed in the inner wall of limit plate 18, sliding block 28 is slidably installed in the inner wall of sliding groove 29, and sliding block 28 top is fixedly connected with fixed column 26.

[0034] It should be noted that: the existence of limit plate 18 provides a stable support basis for motor two 19, which helps to reduce the vibration and shaking generated by motor two 19 during operation.

[0035] Furthermore, the cooperation between the slider 28 and the groove 29 limits the range of movement of the fixed column 26, preventing structural damage or performance degradation caused by excessive movement.

[0036] Please see Figure 1 This utility model provides a technical solution: an IGBT-based chopper, including a fixing ring 10 fixedly installed on the outer wall of an impeller seat 11, and the side wall of the fixing ring 10 being fixedly connected to the side wall of a connecting ring 13.

[0037] It should be noted that the retaining ring 10, as the connecting part between the impeller seat 11 and the connecting ring 13, plays a role in reinforcement and stability, which helps to reduce the loosening or damage of components caused by vibration or impact, and improves the stability and reliability of the entire heat dissipation system.

[0038] Please see Figure 1 This utility model provides a technical solution: an IGBT-based chopper, including a support shell 5 with heat dissipation grooves 7 on the side wall, the heat dissipation grooves 7 being evenly distributed in a circular pattern on the side wall of the support shell 5.

[0039] It should be noted that the design of the heat dissipation groove 7 increases the surface area of ​​the support shell 5, thereby providing more heat dissipation area. The evenly distributed heat dissipation groove 7 helps to dissipate heat more evenly and avoids local overheating.

[0040] Please see Figure 3 , Figure 4 This utility model provides a technical solution: an IGBT-based chopper, including a connecting groove 16 on the inner wall of a heat sink 15, a connecting plate 27 slidably installed on the inner wall of the connecting groove 16, and the side wall of the connecting plate 27 being fixedly connected to the heat sink 17.

[0041] It should be noted that by using a sliding connection, the heat sink 17 can fit more tightly onto the heat sink 15, reducing thermal resistance and improving heat conduction efficiency.

[0042] Please see Figure 1 , Figure 2 This utility model provides a technical solution: an IGBT-based chopper, including a heat-conducting plate 3 with a bolt 4 threadedly installed on the side end, and the outer wall of the bolt 4 being threadedly connected to the heat sink 15.

[0043] Please see Figure 5 This utility model provides a technical solution: an IGBT-based chopper, including a rotating shaft 25 rotatably mounted at the connection between connecting rod 1 20 and connecting rod 21, and a rotating shaft 24 rotatably mounted at the connection between connecting rod 3 22 and connecting rod 4 23.

[0044] It should be noted that: the shaft two 25 and the shaft one 24 as the key connecting point in the connecting rod mechanism, played a supporting and stable role, so that the connecting rod mechanism can maintain a relatively stable state of motion when subjected to external force, avoid the mechanism damage caused by vibration or impact.

[0045] Please refer to Figure 2 The utility model provides a kind of technical scheme based on IGBT chopper, including the heat conduction bin 2 of heat dissipation plate 15 outer wall fixed installation, the chopper 1 of heat dissipation plate 15 away from the one end fixed installation of heat dissipation fin 17.

[0046] It should be noted that: the heat conduction bin 2 as an efficient heat dissipation structure, can quickly conduct heat away on chopper 1.

[0047] Working principle: motor one 6 drives impeller disc 8 to rotate, impeller disc 8 drives impeller blade 9 to rotate, generates airflow, impeller blade 9 is connected with connecting ring 13 through impeller seat 11, connecting ring 13 guides airflow to negative pressure hole 14 of heat conduction plate 3 inner wall, negative pressure hole 14 makes heat conduction plate 3 and heat dissipation plate 15 not easy to produce air gap or thermal bridge effect, reduces thermal resistance, improves heat dissipation efficiency, motor two 19 drives heat dissipation fin 17 to move through connecting rod one 20, connecting rod two 21, connecting rod three 22, connecting rod four 23, by adjusting the spacing between heat dissipation fin 17, air flow can be optimized, further improve heat dissipation efficiency.

Claims

1. An IGBT-based chopper comprising a support casing (5), characterized in that: The inner wall of the support shell (5) is fixedly installed with an adsorption heat dissipation mechanism; The adsorption heat dissipation mechanism comprises a motor one (6) fixedly installed on the inner wall of the support shell (5), a impeller disc (8) fixedly installed on the driving end of the motor one (6), an impeller blade (9) fixedly installed on the side wall end of the impeller disc (8) away from the motor one (6), an impeller seat (11) rotatably installed on one end of the impeller blade (9) away from the impeller disc (8), a sealing ring (12) fixedly installed on the side wall of the impeller seat (11), a connecting ring (13) fixedly installed on the outer wall of the impeller seat (11), a heat conduction plate (3) fixedly installed on the side wall of the connecting ring (13) away from the impeller seat (11), and a negative pressure hole (14) formed in the center of the inner wall of the heat conduction plate (3).

2. An IGBT-based chopper as claimed in claim 1, characterized in that: The side wall of the heat conduction plate (3) is threadedly connected with a heat dissipation plate (15), the inner wall of the heat dissipation plate (15) is slidably installed with a heat dissipation fin (17), and the outer wall of the heat dissipation fin (17) is fixedly installed with a spacing adjusting mechanism. The spacing adjusting mechanism comprises a fixed column (26) fixedly installed on the outer wall of the heat dissipation fin (17), a connecting rod two (21) rotatably installed on the outer wall of the fixed column (26), a connecting rod one (20) rotatably installed on one end of the connecting rod two (21) away from the fixed column (26), the connecting rod one (20) fixedly installed on the driving end of a motor two (19) on one end thereof away from the connecting rod two (21), a connecting rod three (22) rotatably installed on the outer wall of the motor two (19), a connecting rod four (23) rotatably installed on the side end of the connecting rod three (22), and the connecting rod four (23) rotatably installed on the outer wall of the fixed column (26) on an end thereof away from a rotating shaft one (24).

3. An IGBT-based chopper as claimed in claim 2, characterized in that: The bottom of the motor two (19) is fixedly installed with a limiting plate (18), the inner wall of the limiting plate (18) is formed with a sliding groove (29), the sliding groove (29) is slidably installed with a sliding block (28), and the top of the sliding block (28) is fixedly connected with the fixed column (26).

4. An IGBT-based chopper as claimed in claim 1, characterized in that: The outer wall of the impeller seat (11) is fixedly installed with a fixed ring (10), and the side wall of the fixed ring (10) is fixedly connected with the side wall of the connecting ring (13).

5. An IGBT-based chopper as claimed in claim 1, characterized in that: The side wall of the support shell (5) is formed with heat dissipation grooves (7) which are uniformly distributed on the side wall of the support shell (5).

6. An IGBT-based chopper as claimed in claim 2, characterized in that: The inner wall of the heat dissipation plate (15) is formed with a connecting groove (16), the connecting groove (16) is slidably installed with a connecting plate (27), and the side wall of the connecting plate (27) is fixedly connected with the heat dissipation fin (17).

7. An IGBT-based chopper as claimed in claim 1, characterized in that: The side end of the heat conduction plate (3) is threadedly installed with a bolt (4), and the outer wall of the bolt (4) is threadedly connected with the heat dissipation plate (15).

8. An IGBT-based chopper as claimed in claim 2, characterized in that: The connecting rod one (20) and the connecting rod two (21) are rotatably installed with a rotating shaft two (25) at the connection position thereof, and the connecting rod three (22) and the connecting rod four (23) are rotatably installed with a rotating shaft one (24) at the connection position thereof.

9. An IGBT-based chopper as claimed in claim 2, characterized in that: The outer wall of the heat dissipation plate (15) is fixedly installed with a heat conduction bin (2), and one end of the heat dissipation plate (15) away from the heat dissipation fin (17) is fixedly installed with a chopper (1).

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