Stacked rectifier module for 1000KW alternating-current variable-frequency power supply

Abstract

A stacked rectifier module for a 1000KW alternating-current variable-frequency power source relates to the field of alternating-current variable-frequency power sources, heat generated during operation of a rectifier bridge is conducted to a radiator through a heat conduction mechanism, airflow generated during operation of a fan is blown to the radiator, bending parts are arranged at the left end, the right end and the bottom of a bottom plate, and the upper end of each bending part is in an open state. Therefore, hot air generated after airflow flows through the radiator is radiated outwards through the opening in the upper end of the whole bottom plate, the structure is compact, the radiating performance is good, disassembly and assembly are convenient, and the power level is high.

Description

Technical Field

[0001] The utility model relates to the field of AC variable frequency power supply, in particular to a stacked rectifier module for a 1000KW AC variable frequency power supply. Background Art

[0002] Rectifier modules are mainly used for AC variable frequency power supply, that is, AC / DC current conversion. With the rapid development of the new energy vehicle field, the power of the supporting super charging piles is also increasing. Super charging piles need to be equipped with high-power AC variable frequency power supplies. The current domestic high-power AC variable frequency power supply has reached the level of 1000KW. When designing a high-power AC variable frequency power supply, the rectifier module is an indispensable part of its main circuit topology. How to design a rectifier module with a compact structure, high power level, excellent heat dissipation performance, and easy assembly has always been a technical difficulty in the design of AC variable frequency power supply. Summary of the invention

[0003] In order to overcome the deficiencies of the above technologies, the utility model provides a stacked rectifier module for a 1000KW AC variable frequency power supply with a compact structure and good heat dissipation performance.

[0004] The technical solution adopted by the utility model to overcome the technical problems is:

[0005] A stacked rectifier module for a 1000KW AC variable frequency power supply, comprising:

[0006] The bottom plate has bent parts on both sides and the bottom, and each bent part is combined with the bottom plate to form a groove;

[0007] a radiator, mounted in the groove;

[0008] The fan is fixed in the bottom plate, the fan is located below the radiator, and the air outlet of the fan faces the bottom of the radiator;

[0009] A bracket is installed in the groove, and the heat sink is located between the bracket and the bottom plate;

[0010] N rows of rectifier bridge groups, each row of rectifier bridge groups has M rectifier bridges, the N rows of rectifier bridge groups are evenly spaced and fixed on the bracket from top to bottom, the rectifier bridges of each rectifier bridge group are arranged in the horizontal direction, and each rectifier bridge is connected to the radiator through a heat conduction mechanism;

[0011] N stacked busbars, each of which is fixed to a rectifier bridge group, and the stacked busbars electrically connect the rectifier bridges; and

[0012] A plurality of parallel copper bars, each two adjacent rectifier bridge groups are electrically connected through the parallel copper bars.

[0013] Preferably, there are two fans, and both fans are fixed on the base plate.

[0014] In order to avoid mutual interference between the fans, a partition is fixed at the bottom of the base plate in the vertical direction. The partition divides the left and right sides of the bottom of the groove into two independent cavities, and the two fans are respectively installed in the corresponding cavities.

[0015] In order to improve the sealing performance, it also includes a fan cover plate installed at the front end of the cavity, and a circular hole corresponding to the air inlet of the fan is arranged on the fan cover plate, and a fan cover is installed at the circular hole.

[0016] Furthermore, the heat conduction mechanism comprises a heat pipe mounted on the bracket, one end of the heat pipe is connected to the radiator, and the other end of the heat pipe is in contact with the back side of the corresponding rectifier bridge.

[0017] For easy installation, handles are provided on the left and right bent parts of the bottom plate respectively.

[0018] Furthermore, thermal conductive silicone grease is applied to the contact portion between the heat pipe and the rectifier bridge.

[0019] The beneficial effects of the utility model are as follows: the heat generated when the rectifier bridge is working is conducted to the radiator through the heat conduction mechanism, and the airflow generated by the fan is blown toward the radiator. Since the left and right ends and the bottom of the bottom plate are provided with bending parts, the upper end is in an open state, so the hot air after the airflow passes through the radiator is dissipated through the opening at the upper end of the entire bottom plate. The structure is compact, the heat dissipation performance is good, the disassembly and assembly are convenient, and the power level is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model with the fan cover plate removed and the stacked busbars;

[0021] Figure 2 The three-dimensional structure of the utility model Figure Ⅰ ;

[0022] Figure 3 The three-dimensional structure of the utility model Figure II ;

[0023] In the figure, 1. bottom plate 2. bending part 3. radiator 4. bracket 5. heat pipe 6. rectifier bridge 7. stacked busbar 8. parallel copper bar 9. handle 10. fan cover 11. fan cover 12. partition 13. cavity 14. fan. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1 , Attachment Figure 2 , Attachment Figure 3 The utility model is further described.

[0025] A stacked rectifier module for a 1000KW AC variable frequency power supply, comprising: a bottom plate 1, with bent portions 2 on both sides and the bottom, each bent portion and the bottom plate 1 forming a groove; a radiator 3 installed in the groove; a fan 14 fixed in the bottom plate 1, the fan 14 is located below the radiator 3, and the air outlet of the fan 14 faces the bottom of the radiator 3; a bracket 4 installed in the groove, the radiator 3 is located between the bracket 4 and the bottom plate 1; N rows of rectifiers Bridge group, each row of rectifier bridge groups has M rectifier bridges 6, N rows of rectifier bridge groups are evenly spaced and fixed on the bracket 4 from top to bottom, each rectifier bridge 6 of each rectifier bridge group is arranged in the horizontal direction, and each rectifier bridge 6 is connected to the heat sink 3 through a heat conduction mechanism; N stacked busbars 7, each stacked busbar 7 is fixed on the rectifier bridge group, and the stacked busbars 7 electrically connect the rectifier bridges 6; and a plurality of parallel copper bars 8, and every two adjacent rectifier bridge groups are electrically connected through the parallel copper bars 8. After each rectifier bridge 6 is electrically connected to each other through the stacked busbars 7 and the parallel copper bars 8, the heat generated by the rectifier bridge 6 during operation is conducted to the radiator 3 through the heat conduction mechanism, and the airflow generated by the fan 14 is blown toward the radiator 3. Since the left and right ends and the bottom of the bottom plate 1 are provided with bending parts 2, and the upper end thereof is in an open state, the hot air after the airflow passes through the radiator 3 is dissipated through the opening at the upper end of the entire bottom plate 1, and a three-phase power input of 3200A (using 800A unidirectional rectifier bridges, 12 in number) can be achieved. The rectifier module has a compact layout, good heat dissipation, and is easy to assemble, saving space occupied inside the power supply.

[0026] Furthermore, the utility model has two fans 14, and both fans 14 are fixed on the bottom plate 1. The dual fan design can further improve the overall heat dissipation performance. At the same time, preferably, a partition 12 is fixed to the bottom of the bottom plate 1 in the vertical direction, and the partition 12 divides the left and right sides of the bottom of the groove into two independent cavities 13, and the two fans 14 are respectively installed in the corresponding cavities 13. The two fans 14 are isolated by the partition 12, which can ensure that the air ducts between the fans 14 will not interfere with each other.

[0027] In one embodiment of the utility model, a fan cover plate 10 is further included, which is installed at the front end of the cavity 13. A circular hole corresponding to the air inlet of the fan 14 is provided on the fan cover plate 10, and a fan cover 11 is installed at the circular hole. The cover plate 10 can improve the sealing performance of the fan 14, prevent external impurities from entering the fan 14, and the external air enters the fan 14 through the fan cover 11. The fan cover 11 also plays a role in protecting the air inlet of the fan 14, thereby improving the reliability of use.

[0028] In one embodiment of the utility model, the heat conduction mechanism includes a heat pipe 5 mounted on a bracket 4, one end of the heat pipe 5 is connected to the radiator 3, and the other end thereof is in contact with the back of the corresponding rectifier bridge 6. The heat of the rectifier bridge 6 is introduced into the radiator 3 by the heat pipe 5, thereby improving the overall heat dissipation performance of the radiator, and the number of heat pipes 5 can be increased or decreased according to actual heat dissipation requirements. Further preferably, the contact portion between the heat pipe 5 and the rectifier bridge 6 is coated with thermal grease. Heat conduction is performed by thermal grease, thereby further improving the thermal conductivity efficiency between the rectifier bridge and the radiator.

[0029] In one embodiment of the utility model, preferably, handles 9 are respectively provided on the left and right bent portions 2 of the bottom plate 1. The handles 9 can be used to conveniently install the entire rectifier module into or remove it from the cabinet, thereby improving the convenience of installation and disassembly.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A stacked rectifier module for a 1000KW AC variable frequency power supply, characterized in that: include: The bottom plate (1) has bent portions (2) on both left and right sides and the bottom, and each bent portion is combined with the bottom plate (1) to form a groove; A heat sink (3) is installed in the groove; A fan (14) is fixed in the bottom plate (1), the fan (14) is located below the radiator (3), and an air outlet of the fan (14) faces the bottom of the radiator (3); A bracket (4) is installed in the groove, and the heat sink (3) is located between the bracket (4) and the bottom plate (1); N rows of rectifier bridge groups, each row of rectifier bridge groups having M rectifier bridges (6), the N rows of rectifier bridge groups being evenly spaced and fixed on a bracket (4) from top to bottom, the rectifier bridges (6) of each rectifier bridge group being arranged in a horizontal direction, and each rectifier bridge (6) being connected to a heat sink (3) via a heat conduction mechanism; N stacked busbars (7), each stacked busbar (7) being fixed to a rectifier bridge group, and the stacked busbars (7) electrically connecting each rectifier bridge (6); and A plurality of parallel copper bars (8), each two adjacent rectifier bridge groups are electrically connected via the parallel copper bars (8).

2. The stacked rectifier module for 1000KW AC variable frequency power supply according to claim 1, characterized in that: There are two fans (14), and both fans (14) are fixed on the bottom plate (1).

3. The stacked rectifier module for 1000KW AC variable frequency power supply according to claim 2, characterized in that: A partition plate (12) is fixed at the bottom of the bottom plate (1) in the vertical direction, and the partition plate (12) divides the left and right sides of the bottom of the groove into two independent cavities (13), and the two fans (14) are respectively installed in the corresponding cavities (13).

4. The stacked rectifier module for 1000KW AC variable frequency power supply according to claim 3, characterized in that: It also includes a fan cover plate (10) installed at the front end of the cavity (13), the fan cover plate (10) being provided with a circular hole corresponding to the air inlet of the fan (14), and a fan cover (11) being installed at the circular hole.

5. The stacked rectifier module for 1000KW AC variable frequency power supply according to claim 1, characterized in that: The heat conduction mechanism comprises a heat pipe (5) mounted on a bracket (4); one end of the heat pipe (5) is connected to the radiator (3), and the other end thereof is in contact with the back surface of a corresponding rectifier bridge (6).

6. The stacked rectifier module for 1000KW AC variable frequency power supply according to claim 1, characterized in that: Handles (9) are respectively provided on the left and right bent portions (2) of the bottom plate (1).

7. The stacked rectifier module for 1000KW AC variable frequency power supply according to claim 5, characterized in that: The contact portion between the heat pipe (5) and the rectifier bridge (6) is coated with thermal conductive silicone grease.

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