CN219802170U - Inverter structure and electric transportation equipment - Google Patents
Inverter structure and electric transportation equipment Download PDFInfo
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- CN219802170U CN219802170U CN202320474531.9U CN202320474531U CN219802170U CN 219802170 U CN219802170 U CN 219802170U CN 202320474531 U CN202320474531 U CN 202320474531U CN 219802170 U CN219802170 U CN 219802170U
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- inverter structure
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- 239000004065 semiconductor Substances 0.000 claims abstract description 67
- 230000000712 assembly Effects 0.000 claims abstract description 48
- 238000000429 assembly Methods 0.000 claims abstract description 48
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 239000002826 coolant Substances 0.000 claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 238000010276 construction Methods 0.000 claims 1
- 239000012809 cooling fluid Substances 0.000 claims 1
- 238000001914 filtration Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 10
- 230000017525 heat dissipation Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
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- Inverter Devices (AREA)
Abstract
The utility model discloses an inverter structure which comprises a box body, a filtering component, a capacitor, an alternating current busbar, a direct current connector, an alternating current connector and two groups of parallel power semiconductor module assemblies, wherein a splitter plate is arranged in the box body, the two groups of power semiconductor module assemblies are symmetrically arranged on two sides of the splitter plate, two groups of cooling flow channels which are symmetrically distributed are arranged between the two groups of power semiconductor module assemblies and the surface of the splitter plate, and a coolant inlet and a coolant outlet which are simultaneously connected with the two groups of cooling flow channels are arranged outside the box body. Two groups of power semiconductor module assemblies are arranged in the box body, under the condition of increasing a small volume, the power of the inverter is greatly increased, the power density is improved, and the chip temperature rises of the two parallel power semiconductor module assemblies are basically the same, so that the electric performance consistency of the two groups of parallel modules is ensured. The utility model also discloses electric transportation equipment comprising the inverter structure.
Description
Technical Field
The utility model relates to the field of transportation equipment, in particular to an inverter structure. The utility model also relates to an electric transport device comprising the inverter structure.
Background
The conventional fuel oil transportation equipment can generate a large amount of harmful gas in the use process, and petroleum is used as non-renewable energy sources to be less and less, so that in order to protect the living environment of human beings and ease energy supply, the electric transportation equipment has been a trend to replace the conventional fuel oil transportation equipment. The inverter structure is used as a core control component of the electric transportation equipment, and the power, efficiency and stability of the inverter structure are critical to the performance of the transportation equipment.
In the prior art, a power control part of a vehicle-mounted inverter adopts a group of power semiconductor modules, and the power of a single group of power semiconductors is limited by the power of the inverter, so that the power is small and the power density is small. Meanwhile, the space size and the volume of the inverter are limited, and the size cannot be excessively large. Further, in order to ensure stable operation of the inverter, a good heat dissipation mode needs to be provided, and in the prior art, a cooling flow channel is arranged on one side of the power semiconductor module, so that a heat dissipation effect cannot be ensured.
Therefore, how to provide an inverter structure that improves the power density and ensures the heat dissipation effect is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The utility model aims to provide an inverter structure, which increases the power of an inverter by arranging two groups of power semiconductor module assemblies, has smaller volume increase and ensures the heat dissipation effect by symmetrically arranged cooling flow channels. Another object of the present utility model is to provide an electric transportation apparatus including the above inverter structure.
In order to solve the technical problems, the utility model provides an inverter structure, which comprises a box body, a filter assembly, a capacitor, an alternating current busbar, a direct current connector, an alternating current connector and two groups of parallel power semiconductor module assemblies, wherein the filter assembly, the capacitor, the alternating current busbar, the direct current connector, the alternating current connector and the two groups of parallel power semiconductor module assemblies are arranged in the box body, the direct current connector penetrates through the filter assembly to be connected with an input terminal of the capacitor, a plurality of output terminals of the capacitor are respectively connected with the two groups of power semiconductor module assemblies, the output terminals of the two groups of power semiconductor module assemblies are connected with the alternating current busbar, the alternating current busbar is connected with the alternating current connector, a splitter plate is arranged in the box body, the two groups of power semiconductor module assemblies are symmetrically arranged on two sides of the splitter plate, two groups of cooling flow channels which are symmetrically distributed are arranged between the two groups of power semiconductor module assemblies and the splitter plate surface, and the outside of the box body is provided with a coolant inlet and a coolant outlet which are simultaneously connected with the two groups of cooling flow channels.
Preferably, the two sets of power semiconductor module assemblies are embodied as two three-phase full-bridge power semiconductor modules.
Preferably, two groups of the power semiconductor module assemblies are specifically six half-bridge power semiconductor modules.
Preferably, a current sensor is arranged outside the alternating current busbar.
Preferably, a signal wire connector is arranged outside the box body.
Preferably, two of the dc connectors, the coolant inlet and the coolant outlet are provided at the front end outside the case, and three of the ac connectors and the signal line connectors are provided at the rear end outside the case.
Preferably, the filter component and the capacitor are arranged at the front end inside the box body, the current sensor is arranged at the rear end inside the box body, and the two groups of power semiconductor module assemblies are arranged at the middle part inside the box body.
Preferably, the alternating current busbar comprises a main board, a first connecting plate which is bent upwards is arranged on one side of the front end of the main board, a second connecting plate which is bent downwards is arranged on the other side of the front end of the main board, the first connecting plate and the second connecting plate are symmetrical in center and are respectively connected with two groups of power semiconductor module assemblies, and the rear end of the main board is connected with the alternating current connector.
Preferably, the power semiconductor module further comprises a radiator, two groups of power semiconductor module assemblies are respectively attached to two sides of the radiator, and the splitter plate and the cooling flow channel are arranged in the radiator.
The utility model also provides an electric transportation device comprising an inverter structure as described in any one of the above.
The utility model provides an inverter structure which comprises a box body, a filter assembly, a capacitor, an alternating current busbar, a direct current connector, an alternating current connector and two groups of parallel power semiconductor module assemblies, wherein the filter assembly, the capacitor, the alternating current busbar, the direct current connector and the two groups of parallel power semiconductor module assemblies are arranged in the box body, the direct current connector penetrates through the filter assembly to be connected with input terminals of the capacitor, a plurality of output terminals of the capacitor are respectively connected with the two groups of power semiconductor module assemblies, the output terminals of the two groups of power semiconductor module assemblies are connected with the alternating current busbar, the alternating current busbar is connected with the alternating current connector, a splitter plate is arranged in the box body, the two groups of power semiconductor module assemblies are symmetrically arranged on two sides of the splitter plate, two groups of cooling flow passages which are symmetrically distributed are arranged between the two groups of power semiconductor module assemblies and the splitter plate surface, and a coolant inlet and a coolant outlet which are simultaneously connected with the two groups of cooling flow passages are arranged outside the box body.
The two groups of power semiconductor module assemblies are arranged in the box body, under the condition of increasing a small volume, the power of the inverter is greatly increased, the power density is improved, the heat dissipation effect is ensured through symmetrically distributed cooling flow channels, the two groups of power semiconductor module assemblies have the identical cooling effect, the chip temperature rise of the two parallel power semiconductor module assemblies is basically identical, and therefore the consistency of the electrical performance of the two groups of parallel modules is ensured.
The present utility model also provides an electric transportation apparatus including the above-mentioned inverter structure, and since the above-mentioned inverter structure has the above-mentioned technical effects, the above-mentioned electric transportation apparatus should have the same technical effects, and will not be described in detail herein.
Drawings
Fig. 1 is a schematic view of an external structure of an embodiment of an inverter structure according to the present utility model;
fig. 2 is a schematic diagram of an internal structure of an embodiment of an inverter structure according to the present utility model;
FIG. 3 is a schematic top view of an embodiment of an inverter structure according to the present utility model;
FIG. 4 is a schematic cross-sectional view of an embodiment of an inverter structure according to the present utility model;
fig. 5 is a schematic structural diagram of an ac busbar in an embodiment of the inverter structure provided by the present utility model.
The device comprises a box body 1, a filter assembly 2, a capacitor 3, an alternating current busbar 4, a main board 4-1, a first connecting board 4-2, a second connecting board 4-3, a direct current connector 5, an alternating current connector 6, a power semiconductor module assembly 7, a coolant inlet 8, a coolant outlet 9, a current sensor 10, a signal wire connector 11, a cooler 12, a splitter plate 12-1 and a cooling runner 12-2.
Detailed Description
The utility model is characterized in that the inverter structure is provided, the power of the inverter is increased by arranging two groups of power semiconductor module assemblies, the volume increase is smaller, and the heat dissipation effect is ensured by symmetrically arranged cooling flow channels. Another core of the present utility model is to provide an electric transportation apparatus including the above inverter structure.
In order to better understand the aspects of the present utility model, the present utility model will be described in further detail with reference to the accompanying drawings and detailed description.
Referring to fig. 1 to 5, fig. 1 is a schematic view illustrating an external structure of an embodiment of an inverter structure according to the present utility model; fig. 2 is a schematic diagram of an internal structure of an embodiment of an inverter structure according to the present utility model; FIG. 3 is a schematic top view of an embodiment of an inverter structure according to the present utility model; FIG. 4 is a schematic cross-sectional view of an embodiment of an inverter structure according to the present utility model; fig. 5 is a schematic structural diagram of an ac busbar in an embodiment of the inverter structure provided by the present utility model.
The embodiment of the utility model provides an inverter structure, which comprises a box body 1, a filter assembly 2, a capacitor 3, an alternating current busbar 4, a direct current connector 5, an alternating current connector 6 and two groups of parallel power semiconductor module assemblies 7, wherein the filter assembly 2, the capacitor 3, the alternating current busbar 4, the direct current connector 6 and the two groups of parallel power semiconductor module assemblies 7 are arranged in the box body 1. The cable of the direct current power supply passes through the filter assembly 2 through the direct current connector 5 to eliminate electromagnetic interference and then is fixedly connected with the input terminal of the capacitor 3, and the current is output by 12 output terminals of the capacitor 3 after being processed by blocking ripple waves by the film capacitor 3, eliminating direct current bus voltage fluctuation and the like; the 12 output terminals of the capacitor are respectively butted with the corresponding terminals of the two groups of parallel power semiconductor module assemblies 7; the direct current is inverted into three-phase alternating current through the power semiconductor module assembly 7 and then is output by the output terminals of the power semiconductor module assembly 7, the output terminals of the two groups of power semiconductor module assemblies 7 are connected with the alternating current busbar 4, the alternating current busbar 4 is connected with the alternating current connector 6, and the alternating current busbar is further connected with the motor bus for connection, so that the motor is driven to rotate.
Two groups of power semiconductor module assemblies 7 are arranged in the box body 1, under the condition of increasing a small amount of volume, the power of the inverter is greatly increased, the power density is improved, the power of the inverter can be increased by nearly one time, and the power density of the inverter is improved by more than 60%.
Further, a splitter plate 12-1 is arranged in the box body 1, two groups of power semiconductor module assemblies 7 are symmetrically arranged on two sides of the splitter plate 12-1, two groups of cooling flow channels 12-2 which are symmetrically distributed are arranged between the two groups of power semiconductor module assemblies 7 and the surface of the splitter plate 12-1, and a coolant inlet 8 and a coolant outlet 9 which are simultaneously connected with the two groups of cooling flow channels 12-2 are arranged outside the box body 1.
The two groups of power semiconductor module assemblies 7 are arranged on two sides of an internal cavity of the box body 1, a cooling cavity is formed with the box body 1, a flow dividing plate 12-1 is arranged in the cooling cavity, the cooling cavity is divided into two completely symmetrical cooling flow passages 12-2, the two parallel modules are subjected to heat dissipation, the two cooling flow passages 12-2 and an external cooling system form a circulating liquid cooling structure through a common coolant inlet 8 and a common coolant outlet 9, the heat dissipation effect is ensured through the symmetrically distributed cooling flow passages 12-2, the two groups of power semiconductor module assemblies 7 have completely the same cooling effect, the chip temperature rise of the two parallel power semiconductor module assemblies 7 is ensured to be basically the same, and therefore the consistency of the electrical performance of the two groups of parallel modules is ensured.
Taking a 230kw silicon carbide vehicle-mounted inverter as an example, adopting a traditional single-group module structure, and the volume V of the inverter 0 =3.5 dm (long) ×3.02dm (wide) ×0.66dm (high) ≡6.97L; power P 0 =230 KW; power density delta 0 ＝P 0 /V 0 ＝230/6.97≈33KW/L
Adopts two groups of back-to-back parallel module structures, the volume V of which 1 =3.5 dm (long) ×3.02dm (wide) ×0.82dm (high) ≡ 8.6.7L; power P 1 =460 KW (voltage unchanged, current doubled current); power density delta 1 ＝P 1 /V 1 =460/8.67≡53KW/L. Compared with the traditional scheme, the patent scheme is as follows: power P 1 /P 0 =2; volumetric power density ratio = delta 1 /δ 0 =53/33≡1.61. It can be seen that the power and power density of the inverter of the patent scheme are significantly improved over the conventional scheme.
In particular, the two sets of power semiconductor module assemblies 7 may be two three-phase full-bridge power semiconductor modules. The two sets of power semiconductor module assemblies 7 may also be six half-bridge power semiconductor modules.
In the inverter structure provided in the embodiment of the present utility model, the ac busbar 4 is provided with a current sensor 10. The outside of the case 1 is provided with a signal line connector 11.
For reasonable layout, two dc connectors 5, a coolant inlet 8 and a coolant outlet 9 are provided at the front end outside the case 1, and three ac connectors 6 and a signal wire connector 11 are provided at the rear end outside the case 1. The filter assembly 2 and the capacitor 3 are arranged at the front end inside the box body 1, the current sensor 10 is arranged at the rear end inside the box body 1, and the two groups of power semiconductor module assemblies 7 are arranged at the middle part inside the box body 1. The layout mode of each component can be adjusted according to the situation and is within the protection scope of the utility model
The alternating current busbar 4 comprises a main board 4-1, a first connecting board 4-2 which is bent upwards is arranged on one side of the front end of the main board 4-1, a second connecting board 4-3 which is bent downwards is arranged on the other side of the front end of the main board 4-1, the first connecting board 4-2 and the second connecting board 4-3 are symmetrical in center and are respectively connected with two groups of power semiconductor module assemblies 7, and the rear end of the main board 4-1 is connected with an alternating current connector 6. Corresponding output ends of the two groups of parallel power semiconductor module assemblies 7 in the structure are connected through the power semiconductor module assembly 7 with the same output impedance, so that the output impedance of the two modules is ensured to be the same, and the corresponding heat consumption is also the same.
On the basis of the inverter structure provided in the above embodiments, the inverter structure further comprises a radiator 12 structure, two groups of power semiconductor module assemblies 7 are respectively attached to two sides of the radiator 12, and a splitter plate 12-1 and a cooling runner 12-2 are arranged in the radiator 12.
In addition to the above inverter structure, the embodiment of the present utility model further provides an electric transportation device including the above inverter structure, and the structure of other parts of the electric transportation device is referred to the prior art, and will not be described herein.
In particular, the above-mentioned electric transportation device may be an electric car, a small electric aircraft or an electric ship.
The inverter structure and the electric transportation device provided by the utility model are described in detail above. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (10)
1. The utility model provides an inverter structure, includes box (1) and install in filter module (2), electric capacity (3), exchange busbar (4), direct current connector (5), exchange connector (6) and two sets of parallelly connected power semiconductor module assembly (7) in box (1), its characterized in that, direct current connector (5) pass filter module (2) are connected the input terminal of electric capacity (3), two sets of power semiconductor module assembly (7) are connected respectively to a plurality of output terminals of electric capacity (3), two sets of power semiconductor module assembly (7) output terminal is connected exchange busbar (4), exchange busbar (4) are connected exchange connector (6), be provided with splitter plate (12-1) in box (1), two sets of power semiconductor module assembly (7) symmetry install in splitter plate (12-1) both sides, and two sets of power semiconductor module assembly (7) with two sets of between splitter plate (12-1) are provided with two sets of coolant channel (2-8) of coolant that are provided with between splitter plate (12-1) symmetry cooling fluid channel (2) are connected simultaneously.
2. Inverter structure according to claim 1, characterized in that the two sets of power semiconductor module assemblies (7) are in particular two three-phase full-bridge power semiconductor modules.
3. Inverter structure according to claim 1, characterized in that two of said power semiconductor module assemblies (7) are embodied as six half-bridge power semiconductor modules.
4. Inverter architecture according to claim 1, characterized in that the ac busbar (4) is externally provided with a current sensor (10).
5. Inverter construction according to claim 4, characterized in that the housing (1) is provided externally with a signal line connector (11).
6. The inverter structure according to claim 5, wherein two of the dc connectors (5), the coolant inlet (8) and the coolant outlet (9) are provided at front ends outside the case (1), and three of the ac connectors (6) and the signal line connectors (11) are provided at rear ends outside the case (1).
7. The inverter structure of claim 6, wherein the filter assembly (2) and the capacitor (3) are disposed at a front end inside the case (1), the current sensor (10) is disposed at a rear end inside the case (1), and two sets of the power semiconductor module assemblies (7) are disposed at a middle part inside the case (1).
8. The inverter structure of claim 1, wherein the ac busbar (4) comprises a main board (4-1), a first connecting board (4-2) bent upwards is provided on one side of a front end of the main board (4-1), a second connecting board (4-3) bent downwards is provided on the other side of the front end of the main board (4-1), the first connecting board (4-2) and the second connecting board (4-3) are centrosymmetric and are respectively connected with two groups of power semiconductor module assemblies (7), and a rear end of the main board (4-1) is connected with the ac connector (6).
9. The inverter structure of any one of claims 1 to 8, further comprising a heat sink (12), wherein two sides of the heat sink (12) are respectively attached to two groups of the power semiconductor module assemblies (7), and the heat sink (12) is internally provided with the flow dividing plate (12-1) and the cooling flow channel (12-2).
10. An electric transportation apparatus comprising the inverter structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320474531.9U CN219802170U (en) | 2023-03-07 | 2023-03-07 | Inverter structure and electric transportation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320474531.9U CN219802170U (en) | 2023-03-07 | 2023-03-07 | Inverter structure and electric transportation equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219802170U true CN219802170U (en) | 2023-10-03 |
Family
ID=88188477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320474531.9U Active CN219802170U (en) | 2023-03-07 | 2023-03-07 | Inverter structure and electric transportation equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219802170U (en) |
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2023
- 2023-03-07 CN CN202320474531.9U patent/CN219802170U/en active Active
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