Frequency converter with compact structure

Abstract

The utility model discloses a frequency converter with a compact structure, which comprises an upper shell, a lower shell, a control board, a driving board, an insulated gate bipolar transistor (IGBT) module integrated on the driving board, a wiring terminal strip, a radiator and a fan, the upper shell is fixedly connected with the lower shell, and two ends of the upper shell are respectively and correspondingly provided with an air inlet and an air outlet. The lower shell comprises a bottom plate, a vertical plate and a top plate which are integrally connected in sequence, the control plate is transversely fixed to one end of the top plate, the driving plate is vertically arranged on one side of the vertical plate, the radiator is fixedly installed on the other side of the vertical plate, the IGBT module is fixedly connected to the back face of the radiator, and the fan is fixedly installed at one end of the vertical plate and located on the inner side of the air inlet. And the air inlet, the radiator and the air outlet are positioned on the same side. According to the utility model, the three-dimensional space can be fully utilized, and the frequency converter is more compact in structure and more reasonable in layout on the basis of ensuring effective heat dissipation, so that the occupied space is effectively saved; in addition, wiring is more convenient, and misconnection and missed connection cannot be caused.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter technology, specifically a compact frequency converter. Background Technology

[0002] A frequency converter is a power control device that uses frequency conversion technology and microelectronics technology to control an AC motor by changing the frequency of the motor's operating power supply. It mainly includes a housing, control board, drive board, terminal block, heat sink, and fan, etc. The control board and drive board are both horizontally fixed inside the housing.

[0003] Because the drive board integrates a large number of electronic components, including IGBT modules and large capacitors, its size is relatively large, requiring ample internal space. Therefore, while ensuring effective housing and heat dissipation, making the inverter structure more compact to save space becomes a key challenge. Furthermore, the terminal blocks typically include input and output terminal blocks for both the control board and the drive board; facilitating wiring in these areas also needs to be addressed. Utility Model Content

[0004] The purpose of this invention is to overcome the defects and shortcomings of the existing technology and provide a compact frequency converter that, while ensuring effective heat dissipation, makes the frequency converter structure more compact and the layout more reasonable, thereby saving space and facilitating wiring.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A compact frequency converter includes an upper shell, a lower shell, a control board, a drive board, an IGBT module integrated on the drive board, a terminal block, a heat sink, and a fan. The upper shell and the lower shell are fixedly connected, and the two ends of the upper shell are respectively provided with an air inlet and an air outlet. The lower shell includes a bottom plate, a vertical plate, and a top plate that are integrally connected in sequence. The control board is horizontally fixed to one end of the top plate. The drive board is vertically disposed on one side of the vertical plate. The heat sink is fixedly installed on the other side of the vertical plate. The IGBT module is fixedly connected to the back of the heat sink. The fan is fixedly installed at one end of the vertical plate and located inside the air inlet, and is on the same side as the air inlet, the heat sink, and the air outlet.

[0007] Furthermore, a number of support columns are integrally connected to one side edge of one end of the top plate to support one side of the control plate from below, and limit buckles are integrally connected to two of the support columns.

[0008] Furthermore, the control board has two limiting slots on one side edge, and the two limiting buckles are respectively engaged in the two limiting slots to fix one side of the control board, while the other side of the control board abuts against the upper edge of the drive board.

[0009] Furthermore, the vertical plate has a window in the middle, and the vertical plate has a first through hole at each of the four corners of the window.

[0010] Furthermore, the back of the radiator is provided with first threaded blind holes that are symmetrical at the four corners, and a first bolt passes through the first through hole and is screwed into the corresponding first threaded blind hole.

[0011] Furthermore, the IGBT module has second through holes on both sides, and the back of the heat sink has a second threaded blind hole. A second bolt passes through the second through hole and is screwed into the corresponding second threaded blind hole.

[0012] Furthermore, the drive plate is provided with a third through hole for the second bolt to pass through.

[0013] Furthermore, the bottom of the upper shell is provided with slots on both sides, and the two sides of the lower shell are integrally connected with buckles. The buckles can be inserted into the corresponding slots. The upper surface of the lower shell is integrally connected with a limiting block, which abuts against the outer side of the lower edge of the drive plate to limit the drive plate from the outside.

[0014] Furthermore, the terminal block includes an input terminal block and an output terminal block for the control board, and an input terminal block and an output terminal block for the drive board. The input terminal block and the output terminal block for the control board are arranged at different heights. The upper shell has openings for the input terminal block and the output terminal block for the control board to be exposed. The upper shell has raised sections at positions corresponding to the input terminal block and the output terminal block for the drive board, and the side walls of the raised sections have wiring holes.

[0015] Furthermore, one end of the vertical plate is provided with a fan mounting position, and each of the four corners of the fan mounting position is integrally connected with a horizontally extending positioning post. The end face of the positioning post is provided with a third threaded blind hole, and each of the four corners of the fan is provided with a positioning hole. The fan is fitted onto the positioning post through the positioning hole, and a third bolt is screwed into the corresponding third threaded blind hole.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model horizontally fixes a relatively small control board inside the housing, while vertically placing a relatively large drive board and fixing the heat sink inside the housing. The IGBT module integrated on the drive board is fixedly connected to the back of the heat sink, thus fixing the drive board inside the housing. In addition, the air inlet, fan, heat sink and air outlet are located on the same side, which can make full use of the three-dimensional space. While ensuring effective heat dissipation, it makes the inverter structure more compact and the layout more reasonable, thereby effectively saving space.

[0018] 2. In this utility model, the input terminal blocks and output terminal blocks of the control board are arranged in a staggered manner. At the same time, the upper shell is designed with protrusions at the positions corresponding to the input terminal blocks and output terminal blocks of the drive board, and wiring holes are provided on the side walls of the protrusions. Wiring is more convenient and will not cause incorrect or missing connections. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0020] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0021] Figure 3 This is a schematic diagram of the internal structure of the present invention. Figure 1 .

[0022] Figure 4 for Figure 3 A partial structural diagram.

[0023] Figure 5 This is a schematic diagram of the internal structure of the present invention. Figure 2 .

[0024] Figure 6 for Figure 5 A partial structural diagram.

[0025] Figure 7 This is a schematic diagram of the lower shell structure of this utility model. Figure 1 .

[0026] Figure 8 This is a schematic diagram of the lower shell structure of this utility model. Figure 2 .

[0027] Figure 9 This is a schematic diagram of the drive board in this utility model. Detailed Implementation

[0028] 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.

[0029] See Figure 1-9 A compact frequency converter includes an upper shell 1, a lower shell 2, a control board 3, a drive board 4, an IGBT module 5 integrated on the drive board 4, a terminal block 6, a heat sink 7, and a fan 8. The upper shell 1 and the lower shell 2 are fixedly connected. The two ends of the upper shell 1 are respectively provided with an air inlet and an air outlet 9. The lower shell 2 includes a bottom plate 201, a vertical plate 202, and a top plate 203 that are integrally connected in sequence. The control board 3 is horizontally fixed to one end of the top plate 203. The drive board 4 is vertically arranged on one side of the vertical plate 202. The heat sink 7 is fixedly installed on the other side of the vertical plate 202. The IGBT module 5 is fixedly connected to the back of the heat sink 7. The fan 8 is fixedly installed at one end of the vertical plate 202 and located inside the air inlet, and is on the same side as the air inlet, the heat sink 7, and the air outlet 9.

[0030] In this utility model, four support columns 10 are integrally connected to one side edge of one end of the top plate 203, so as to support one side of the control plate 3 from the bottom. Limiting buckles 11 are integrally connected to two of the support columns.

[0031] In this utility model, two limiting slots 12 are provided on one side edge of the control board 3, and two limiting buckles 11 are respectively engaged in the two limiting slots 12 to fix one side of the control board 3. The other side of the control board 3 abuts against the upper edge of the drive board 4, and the drive board 4 provides support for the other side of the control board 3.

[0032] In this utility model, a window 13 is provided in the middle of the vertical plate 202 to provide space for the connection between the IGBT module 5 and the heat sink 7. The vertical plate 202 has first through holes (not shown in the figure) at the four corners of the window 13.

[0033] In addition, the other end of the vertical plate 202 is provided with a through hole 27 for the capacitor 14 integrated on the drive plate 4 to pass through, thereby providing space for the capacitor 14 and facilitating its accommodation.

[0034] In this utility model, the back of the radiator 7 is provided with first threaded blind holes (not shown in the figure) that are symmetrical in four corners. A first bolt 15 passes through the first through hole and is screwed into the corresponding first threaded blind hole, so as to fix the radiator 7 to the other side of the vertical plate 202.

[0035] In this utility model, the IGBT module 5 is provided with second through holes 16 on both sides, and the back of the heat sink 7 is provided with a second threaded blind hole (not shown in the figure). A second bolt (not shown in the figure) passes through the second through hole and is screwed into the corresponding second threaded blind hole, so as to fix the IGBT module 5 to the back of the heat sink 7, thereby fixing the vertically placed drive plate 4 to the lower shell 2.

[0036] In this utility model, the drive plate 4 is provided with a third through hole 17 for the second bolt to pass through, so as to facilitate the connection between the IGBT module 5 and the heat sink 7.

[0037] In this utility model, the bottom sides of the upper shell 1 are respectively provided with slots 18, and the two sides of the lower shell 2 are respectively integrally connected with buckles 19. The buckles 19 can be inserted into the corresponding slots 18 to achieve a fixed connection between the upper shell 1 and the lower shell 2. The upper surface of the lower shell 2 is integrally connected with a limiting block 20, which abuts against the outer side of the lower edge of the drive plate 4 to limit the drive plate 4 from the outside.

[0038] In this utility model, the terminal block 6 includes an input terminal block 61 and an output terminal block 62 of the control board, and an input terminal block 63 and an output terminal block 64 of the drive board. The input terminal block 61 and the output terminal block 62 of the control board are arranged at different heights. The upper shell 1 is provided with an opening for the input terminal block 61 and the output terminal block 62 of the control board to be exposed. The upper shell 1 is raised upward at the positions corresponding to the input terminal block 63 and the output terminal block 64 of the drive board to form a protrusion 21. The side wall of the protrusion is provided with a wiring hole 22, so as to realize the wiring of the input terminal block 63 and the output terminal block 64 of the drive board.

[0039] In this utility model, one end of the vertical plate 202 is provided with a fan mounting position. The four corners of the fan mounting position are integrally connected with horizontally extending positioning posts 23. The end face of the positioning post 23 is provided with a third threaded blind hole (not shown in the figure). The four corners of the fan 8 are provided with positioning holes 24. The fan 8 is fitted onto the positioning post 23 through the positioning holes 24. A third bolt (not shown in the figure) is screwed into the corresponding third threaded blind hole to achieve the fixed installation of the fan 8.

[0040] A perforated fan cover 26 is detachably installed in the air inlet via a clip 25. After removing the fan cover 26, the fan 8 can be replaced or cleaned periodically.

[0041] The present invention will be further described below with reference to the accompanying drawings:

[0042] During assembly, the first bolt 15 is passed through the first through hole and screwed into the corresponding first threaded blind hole to fix the radiator 7 to the other side of the vertical plate 202.

[0043] Next, the drive plate 4 is placed vertically on one side of the vertical plate 202, so that the limiting block 20 abuts against the outer side of the lower edge of the drive plate 4, thereby limiting the drive plate 4 from the outside; then the third through hole 17 through which the second bolt passes is passed through the second through hole and screwed into the corresponding second threaded blind hole, thereby fixing the IGBT module 5 to the back of the heat sink 7, thus fixing the vertically placed drive plate 4 to the lower shell 2.

[0044] Then, the two limit buckles 11 are respectively snapped into the two limit slots 12 to fix one side of the control plate 3. At this time, the other side of the control plate 3 abuts against the upper edge of the drive plate 4, and the drive plate 4 provides support for the other side of the control plate 3, thereby fixing the control plate 3 laterally to one end of the top plate 203.

[0045] Then, the fan 8 is mounted on the positioning post 23 through the positioning hole 24, and the third bolt is screwed into the corresponding third thread blind hole to fix the fan 8 to one end of the vertical plate 202.

[0046] Then, snap the buckle 19 into the corresponding slot 18 to fix the upper shell 1 and the lower shell 2 in place.

[0047] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0048] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A compact frequency converter, comprising an upper housing, a lower housing, a control board, a drive board, an IGBT module integrated on the drive board, a terminal block, a heat sink, and a fan, wherein the upper housing and the lower housing are fixedly connected, and the two ends of the upper housing are respectively provided with an air inlet and an air outlet, characterized in that: The lower shell includes a bottom plate, a vertical plate, and a top plate that are integrally connected in sequence. The control board is horizontally fixed to one end of the top plate. The drive board is vertically disposed on one side of the vertical plate. The heat sink is fixedly installed on the other side of the vertical plate. The IGBT module is fixedly connected to the back of the heat sink. The fan is fixedly installed at one end of the vertical plate and located inside the air inlet, and is on the same side as the air inlet, heat sink, and air outlet.

2. The compact frequency converter according to claim 1, characterized in that: Several support columns are integrally connected to one side edge of one end of the top plate to support one side of the control plate from below, and limit buckles are integrally connected to two of the support columns.

3. The compact frequency converter according to claim 2, characterized in that: The control board has two limiting slots on one side edge, and two limiting buckles are respectively engaged in the two limiting slots to fix one side of the control board. The other side of the control board abuts against the upper edge of the drive board.

4. A compact frequency converter according to claim 1, characterized in that: The vertical plate has a window in the middle, and the vertical plate has a first through hole at each of the four corners of the window.

5. A compact frequency converter according to claim 4, characterized in that: The back of the radiator is provided with four symmetrical first threaded blind holes, and a first bolt passes through the first through hole and is screwed into the corresponding first threaded blind hole.

6. A compact frequency converter according to claim 1, characterized in that: The IGBT module has a second through hole on each side, and the back of the heat sink has a second threaded blind hole. A second bolt passes through the second through hole and is screwed into the corresponding second threaded blind hole.

7. A compact frequency converter according to claim 6, characterized in that: The drive plate is provided with a third through hole for the second bolt to pass through.

8. A compact frequency converter according to claim 1, characterized in that: The bottom of the upper shell has slots on both sides, and the two sides of the lower shell are integrally connected with buckles. The buckles can be inserted into the corresponding slots. The upper surface of the lower shell is integrally connected with a limiting block, which abuts against the outer side of the lower edge of the drive plate to limit the drive plate from the outside.

9. A compact frequency converter according to claim 1, characterized in that: The terminal block includes an input terminal block and an output terminal block for a control board, and an input terminal block and an output terminal block for a drive board. The input terminal block and the output terminal block for the control board are arranged at different heights. The upper shell has openings for the input terminal block and the output terminal block for the control board to be exposed. The upper shell has raised sections at positions corresponding to the input terminal block and the output terminal block for the drive board, and wiring holes are provided on the side walls of the raised sections.

10. A compact frequency converter according to claim 1, characterized in that: One end of the vertical plate is provided with a fan mounting position. The four corners of the fan mounting position are integrally connected with horizontally extending positioning posts. The end face of the positioning post is provided with a third threaded blind hole. The four corners of the fan are provided with positioning holes. The fan is fitted onto the positioning post through the positioning holes, and a third bolt is screwed into the corresponding third threaded blind hole.

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