CN117674614A - DC-AC converter - Google Patents
DC-AC converter Download PDFInfo
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- CN117674614A CN117674614A CN202311604148.1A CN202311604148A CN117674614A CN 117674614 A CN117674614 A CN 117674614A CN 202311604148 A CN202311604148 A CN 202311604148A CN 117674614 A CN117674614 A CN 117674614A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 230000017525 heat dissipation Effects 0.000 claims description 31
- 238000009423 ventilation Methods 0.000 claims description 18
- 238000002955 isolation Methods 0.000 claims description 12
- 230000003750 conditioning effect Effects 0.000 claims description 11
- 238000005070 sampling Methods 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 230000006978 adaptation Effects 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims 3
- 238000009413 insulation Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 13
- 230000009286 beneficial effect Effects 0.000 description 11
- 238000013461 design Methods 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of power electronics, and particularly relates to a direct current-alternating current conversion device. In order to solve the problems that in the prior art, the device adopts the laminated busbar to electrically connect components in order to meet the conversion of different voltage levels and power, so that the production cost of the device is high and the production and maintenance efficiency is low.
Description
Technical Field
The invention belongs to the technical field of power electronics, and particularly relates to a direct current-alternating current conversion device.
Background
Along with the rapid progress of new energy technology, the application of chemical energy storage equipment is wider and wider, and the power electronic conversion devices applied to the chemical energy storage field are also more and more, so that the chemical energy storage equipment has the characteristics of high voltage, high current and wide power range, and in order to adapt to battery packs with different voltage grades and different capacities, the power electronic conversion devices with different voltage grades and power grades are required to be designed to adapt to different battery packs.
The current ac/dc conversion device uses an integrated scheme, and designs an independent power electronic conversion device at different voltage and power segments to adapt to a battery pack with a specific capacity interval, so that a printed circuit board in the power electronic conversion device needs to be redesigned and cannot be used instead of each other, which results in higher research, development and production costs.
The Chinese patent application publication No. CN113328636A discloses a compact high-capacity full-bridge flexible direct-current power module unit, an IGBT crimping assembly is electrically connected with a vacuum contactor through a red copper bar, and is electrically connected with a capacitor assembly through a laminated busbar so as to be suitable for power electronic conversion of different voltage grades and powers, but the laminated busbar has higher cost, long production and maintenance period, high production cost and low production and maintenance efficiency of an alternating-current/direct-current conversion device.
Disclosure of Invention
The invention aims to provide a direct current-alternating current conversion device which is used for solving the problems of high production cost and low production and maintenance efficiency of the device caused by the fact that a laminated busbar is adopted for carrying out electric connection on components for the conversion of meeting different voltage levels and power in the prior art.
In order to solve the technical problems, the invention provides a direct current-alternating current conversion device which comprises a box body, wherein an IGBT device, an IGBT driving plate, an alternating current inductor and a direct current filter plate provided with a filter capacitor are arranged in the box body, an IGBT adapting plate is also arranged in the box body, the IGBT device and the IGBT driving plate are arranged on the IGBT adapting plate, the IGBT adapting plate is connected with the alternating current inductor, and the IGBT adapting plate is fixedly connected with the direct current filter plate.
The beneficial effects are as follows: in order to solve the problems that in the prior art, the device adopts the laminated busbar to electrically connect components in order to meet the conversion of different voltage levels and power, so that the production cost of the device is high and the production and maintenance efficiency is low.
Further, the IGBT adapter plate is fixedly connected with the direct current filter plate through bolts.
The beneficial effects are as follows: the connection mode enables connection between the IGBT adapter plate and the direct current filter plate to be simpler, and is beneficial to flexible and convenient disassembly when the IGBT adapter plate is replaced.
Further, a bonding pad and a copper bar are arranged at the joint of the direct current filter plate and the IGBT adapter plate.
The beneficial effects are as follows: the high-current-capacity welding pad is used for relieving the fact that the temperature is too high due to the fact that the current at the joint of the direct-current filter plate and the IGBT adapter plate is extremely high, high-current-capacity welding pad is arranged to ensure the high-current and heat dissipation capacity of the joint, cooling is achieved, and reliability of the joint is guaranteed.
Further, still be provided with the intermediate baffle in the box for divide into two spaces with the space in the box, be protection isolated space and ventilation heat dissipation space respectively, direct current filter board, IGBT device, IGBT drive plate and IGBT adaptation board set up in the protection isolated space, exchange the inductance setting in ventilation heat dissipation space.
The beneficial effects are as follows: the protection isolated space is favorable to protecting the part that is located its inside, and ventilation heat dissipation space is favorable to dispelling the heat to the part that is located its inside to and dispel the heat to the protection isolated space.
Further, the top and the bottom in the protection isolation space are both provided with internal flow-around fans, and the blowing directions of the internal flow-around fans at the top and the bottom are different, so as to realize air circulation of the protection isolation space.
The beneficial effects are as follows: the air circulation device is used for realizing air circulation for protecting an isolated space, conveying hot air at the top downwards, reducing the influence caused by heat accumulation at the top, and effectively prolonging the service life of a product.
Further, an external heat radiation fan is arranged at the air inlet of the ventilation and heat radiation space, and a radiator is also arranged.
The beneficial effects are as follows: the air outside the box body is blown into the ventilation and heat dissipation space from the air inlet, heat in the ventilation and heat dissipation space is discharged, the heat dissipation efficiency of the product is guaranteed to be maximized, more heat generated and parts needing a large amount of heat dissipation are arranged in the ventilation and heat dissipation space of the box body, heat dissipation is facilitated, the device is guaranteed to be in a safe and reliable operation environment, and the service life of the product is further prolonged.
Further, electrolytic capacitor board, interchange hall, exchange filtering board, sampling conditioning board, control adapter board, control core board, power assistance board and control assistance board in the box all set up in the isolated space of protection of box.
The beneficial effects are as follows: the control part with high importance is arranged in the protection isolation space of the box body, which is beneficial to the protection of each part of the box body so as to ensure the safety of the device.
Further, the alternating current inductor is formed by integrating a high-frequency inductor and a low-frequency inductor into a package.
The beneficial effects are as follows: the whole volume of inductance is reduced, a group of inductance wiring is reduced, and the cost of structural design, heat dissipation design and installation wiring is effectively reduced.
Further, the wind direction of the air blowing of the air-around fan protecting the bottom of the isolation space is inclined upwards, and the included angles between the air blowing and the bottom and the side edges of the box body are 45 degrees.
The beneficial effects are as follows: the device is suitable for the installation conditions of multiple boards and narrow air channels in the device, greatly enhances the circulation air quantity in the device, and effectively reduces the problem of internal temperature aggregation.
Drawings
Fig. 1 is a schematic diagram of a dc-ac converter of the present invention;
FIG. 2 is an exploded view of the DC-AC converter of the present invention;
FIG. 3 is a schematic diagram of a DC-AC converter protection space 1 according to the present invention;
FIG. 4 is a schematic diagram of a DC-AC converter protection space 2 according to the present invention;
fig. 5 is an enlarged view of the junction of the direct current filter plate and the IGBT adapter plate of the invention;
FIG. 6 is a schematic illustration of a high current capability bond pad and copper bar of the present invention;
FIG. 7 is a schematic diagram of wind direction of an internal bypass fan of the DC-AC converter of the present invention;
FIG. 8 is a schematic diagram of the air inlet and outlet of the external heat dissipation fan of the DC-AC conversion device of the present invention;
fig. 9 is a schematic wind direction diagram of an external heat dissipation fan of the dc-ac converter of the present invention.
Wherein: 1-a direct current filter plate; 2-electrolytic capacitor plates; 3-IGBT adapter plates; 4-IGBT driving plate; 5-alternating current inductance; 6-alternating-current Hall; 7-an alternating current filter plate; 8-sampling conditioning plate; 9-controlling an adapter plate; 10-controlling the core plate; 11-a power auxiliary board; 12-controlling an auxiliary source plate; 13-an external heat dissipation fan; 14-a heat sink; 15-a box body; 16-an internal bypass fan; 17-an intermediate separator; 18-bonding pads; 19-copper bars; 20—top wrap fan 20; 21-a bottom bypass fan; 22-an air inlet; 23 air outlets.
Detailed Description
The basic idea of the invention is as follows: according to the invention, the laminated busbar in the box body is replaced by the IGBT adapter plate 3, the IGBT drive plate 4 is arranged on the IGBT adapter plate 3, and the conversion between alternating current and direct current in different power and voltage classes is realized by simply replacing the IGBT adapter plate 3, so that the principle of the invention is as follows: the traditional laminated busbar is replaced by the IGBT adapter plate 3, the direct current filter plate 1 and the IGBT adapter plate 3 are fixedly connected, so that the IGBT adapter plate 3 is convenient to replace, and IGBT devices with different voltage levels are used by simply replacing the IGBT adapter plate 3, so that the conversion between alternating current and direct current in different power and voltage levels is realized. Based on this concept, a dc-ac conversion device of the present invention can be realized.
The invention will be described in detail below with reference to the drawings and examples of methods.
Device example 1:
the invention relates to a direct current-alternating current conversion device, the schematic diagram is shown in figure 1, the explosion diagram is shown in figure 2, the device comprises a box body 15, the box body 15 comprises a direct current filter plate 1, an electrolytic capacitor plate 2, an IGBT adapting plate 3, an IGBT driving plate 4, an alternating current inductor 5, an alternating current Hall 6, an alternating current filter plate 7, a sampling conditioning plate 8, a control adapting plate 9, a control core plate 10, a power auxiliary source plate 11, a control auxiliary source plate 12, an external heat dissipation fan 13, a radiator 14, an internal bypass fan 16 and an intermediate partition plate 17;
as shown in fig. 3, the high-voltage side of the dc filter board 1 is fixedly connected with the dc side of the IGBT adapter board 3 by a fixing member (in this embodiment, bolt connection is adopted); the IGBT driving plate 4 is arranged on the IGBT adapting plate 3; the alternating current side of the IGBT adapter plate 3 is connected with the low-voltage side of an alternating current inductor 5, the alternating current inductor is arranged in a ventilation and heat dissipation space for realizing good heat dissipation capacity, and an inductor outgoing line is connected with the IGBT adapter plate 3 and an alternating current filter plate 7 through a cable; the enlarged diagram of the joint of the direct current filter plate 1 and the IGBT adapter plate 3 is shown in fig. 5, and the conversion between alternating current and direct current with different power and voltage levels is carried out by simply replacing the IGBT adapter plate 3; the alternating current inductor is formed by integrating a high-frequency inductor and a low-frequency inductor into a whole.
As shown in fig. 5 and 6, compared with the traditional laminated busbar, the manufacturing cost of the IGBT adapter plate 3 is far lower than that of the laminated busbar, the laminated busbar cannot be applicable to welded IGBT modules and discrete devices, and can only be applicable to bolted IGBT modules, the applicability of the IGBT adapter plate is far behind that of the IGBT adapter plate 3 based on PCB, and the IGBT driver or driving circuit can be conveniently integrated through the IGBT adapter plate 3, so that the internal space is greatly saved, and the power density and reliability of the product are improved.
Device example 2:
the invention relates to a direct current-alternating current conversion device, the schematic diagram is shown in figure 1, the explosion diagram is shown in figure 2, the device comprises a box body 15, the box body 15 comprises a direct current filter plate 1, an electrolytic capacitor plate 2, an IGBT adapting plate 3, an IGBT driving plate 4, an alternating current inductor 5, an alternating current Hall 6, an alternating current filter plate 7, a sampling conditioning plate 8, a control adapting plate 9, a control core plate 10, a power auxiliary source plate 11, a control auxiliary source plate 12, an external heat dissipation fan 13, a radiator 14, a box body 15, an internal bypass fan 16 and an intermediate partition plate 17;
because the current of the junction of the IGBT adapter plate 3 and the dc filter plate 1 is extremely large, under the power condition of 200kW, the current capacity is required to be about 100A, in order to ensure the current capacity and the heat dissipation capacity, corresponding large current capacity treatment is also performed on the junction of the dc filter plate 1 and the IGBT adapter plate 3, and under the combined auxiliary action of the 6-layer board design, the high-current capacity bonding pad 18 and the high-current capacity copper bar 19, the low temperature rise result with the temperature rise less than 20K is realized, and the reliability of the junction is ensured, as shown in fig. 6.
Device example 3:
the invention relates to a direct current-alternating current conversion device, the schematic diagram is shown in figure 1, the explosion diagram is shown in figure 2, the device comprises a box body 15, the box body 15 comprises a direct current filter plate 1, an electrolytic capacitor plate 2, an IGBT adapting plate 3, an IGBT driving plate 4, an alternating current inductor 5, an alternating current Hall 6, an alternating current filter plate 7, a sampling conditioning plate 8, a control adapting plate 9, a control core plate 10, a power auxiliary source plate 11, a control auxiliary source plate 12, an external heat dissipation fan 13, a radiator 14, a box body 15, an internal bypass fan 16 and an intermediate partition plate 17;
the middle partition plate 17 is used for dividing the space in the box body into a protection isolation space and a ventilation and heat dissipation space, the protection isolation space is communicated with the ventilation and heat dissipation space through holes in the middle partition plate, and all other surfaces are closed; a plurality of air outlets 23 and air inlets 22 are arranged around the ventilation and heat dissipation space; wherein the protection isolated space comprises: the device comprises a direct current filter plate 1, an electrolytic capacitor plate 2, an IGBT adapter plate 3, an IGBT driving plate 4, an alternating current Hall 6, an alternating current filter plate 7, a sampling conditioning plate 8, a control adapter plate 9, a control core plate 10, a power auxiliary source plate 11, a control auxiliary source plate 12 and an internal bypass fan 16; the ventilation and heat dissipation space comprises: an ac inductor 5, an external heat dissipation fan 13 and a heat sink 14.
The internal flow-around fan 16 comprises a top flow-around fan 20 and a bottom flow-around fan 21, and because the product is vertically installed during installation, hot air gathers at the top of the equipment, so that the top flow-around fan 20 is designed at the top of the protection and isolation space, the hot air at the top is conveyed downwards, the influence caused by heat gathering at the top is reduced, and because the board inside the equipment is more, the air duct is narrow, the bottom flow-around fan 21 is also designed at the bottom of the equipment in the direction of 45 degrees inclined to the air duct, and forms a circulating air duct with the fan at the top, thereby greatly enhancing the circulating air quantity of the protection and isolation space, effectively reducing the problem of temperature gathering of the protection and isolation space, realizing air circulation of the protection and isolation space of the equipment, effectively ensuring the constancy of the internal temperature of the device, and effectively prolonging the service life of the product, and particularly as shown in fig. 7;
in the ventilation and heat dissipation space of the box body, 4 fans are designed to dissipate heat in the ventilation and heat dissipation space, a specific air duct design is shown in fig. 8, air is introduced through the bottom of the ventilation and heat dissipation space, then air is discharged from the two sides and the top of the equipment after passing through the radiator 14 and the alternating current inductor 5, the heat dissipation efficiency of the device is ensured to be maximized, and a detailed hot fluid simulation result is shown in fig. 9.
The sampling conditioning plate 8 is used for collecting direct-current voltage and current, alternating-current voltage and current and other signals; the control core board 10 is arranged on the control adapting board 9 and is connected with the sampling conditioning board 8 through the control adapting board 9; the power auxiliary source plate 11 is connected with the sampling conditioning plate 8 and is used for supplying power to the whole device; the control auxiliary source board 12 is connected with the sampling conditioning board 8, the IGBT adapting board 3 and the control adapting board 9, and is used for controlling the power supply of the circuit board in the device, as shown in fig. 4.
The invention is formed by combining circuit boards with different functions, wherein the circuit boards comprise IGBT adapter plates, the conversion of alternating current and direct current power with different voltage grades is adapted by simply replacing the IGBT adapter plates, the invention can realize the multiplexing of components according to different voltage grades and power grades without using laminated busbar, and further the development and production cost is reduced.
Claims (9)
1. The utility model provides a direct current alternating current conversion device, includes the box, is provided with IGBT device, IGBT drive plate, interchange inductance and installs filter capacitance's direct current filter plate in the box, its characterized in that still is provided with the IGBT adaptation board in the box, IGBT device and IGBT drive plate install in on the IGBT adaptation board, IGBT adaptation board is connected with interchange inductance, and IGBT adaptation board and direct current filter plate fixed connection.
2. The dc to ac converter of claim 1 wherein the IGBT adapter plate is fixedly connected to the dc filter plate by bolts.
3. The direct current-alternating current conversion device according to claim 1, wherein a bonding pad and a copper bar are arranged at the joint of the direct current filter plate and the IGBT adapter plate.
4. The direct current-alternating current conversion device according to claim 1, wherein an intermediate partition plate is further arranged in the box body and used for dividing the space in the box body into two spaces, namely a protection isolation space and a ventilation heat dissipation space, the direct current filter plate, the IGBT device, the IGBT driving plate and the IGBT adapting plate are arranged in the protection isolation space, and the alternating current inductor is arranged in the ventilation heat dissipation space.
5. The dc-ac converter of claim 4 wherein the top and bottom inside the protective insulating space are each provided with an internal bypass fan, and the top and bottom internal bypass fans have different blowing directions for achieving air circulation of the protective insulating space.
6. The dc to ac converter of claim 4, wherein an external heat dissipating fan is provided at an air inlet of the ventilation and heat dissipating space, and a heat sink is further provided.
7. The dc to ac converter of claim 4 wherein the electrolytic capacitor plate, ac hall, ac filter plate, sampling conditioning plate, control adapter plate, control core plate, power auxiliary plate and control auxiliary plate are all disposed in a protective insulating space of the housing.
8. The dc to ac converter of claim 1 wherein the ac inductor is formed from a high frequency inductor and low frequency inductor integrated package.
9. The dc to ac converter of claim 5 wherein the direction of the air flow of the flow around fan protecting the bottom of the insulation space is angled upward and at an angle of 45 ° to both the bottom and sides of the tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311604148.1A CN117674614A (en) | 2023-11-28 | 2023-11-28 | DC-AC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311604148.1A CN117674614A (en) | 2023-11-28 | 2023-11-28 | DC-AC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117674614A true CN117674614A (en) | 2024-03-08 |
Family
ID=90069197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311604148.1A Pending CN117674614A (en) | 2023-11-28 | 2023-11-28 | DC-AC converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117674614A (en) |
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2023
- 2023-11-28 CN CN202311604148.1A patent/CN117674614A/en active Pending
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