Power unit and power electronic equipment

Abstract

The utility model discloses a power unit and a power electronic device, the power unit comprises a housing, an I-GBT module, a capacitor assembly, an insulating plate and a separator plate, the housing is provided with a first installation area and a second installation area, the I-GBT module is arranged in the first installation area, the capacitor assembly is arranged in the second installation area, and the insulating plate is arranged in the second installation area. The shell, the insulating plate and the partition plate form an anti-explosion cavity in the first installation area, and the IGBT module is located in the anti-explosion cavity. According to the utility model, the insulating plate and the separator plate are designed and are combined with the housing to form the explosion-proof cavity, and the IGBT module is limited in the relatively closed explosion-proof cavity, so that chippings generated by explosion of the IGBT module are prevented from diffusing out of the explosion-proof cavity to influence a capacitor assembly inside the power unit or other components outside the power unit.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of power electronics, especially to a power unit and power electronic equipment. BACKGROUND

[0002] With the rapid development of new energy, the SVG device (static var generator) based on power electronic power devices has been more and more widely used in the power grid, and a large amount of heat will be generated in the work of power electronic power devices (such as IGBT / IGCT module, etc.), which may cause explosion of IGBT module due to improper heat dissipation, overvoltage, overcurrent, etc. Although the material and process packaging quality of power devices are continuously improved, and the overheat, overvoltage and overcurrent protection of power electronic power devices is more and more reliable, but in extreme cases, explosion accidents may still occur. Especially the products containing multiple power units, such as cascade high-voltage SVG products with multiple power units in series, low-voltage wind power or photovoltaic converters with multiple power units in parallel, etc.

[0003] Taking the cascade 35kV / 10kV high-voltage SVG product as an example, the number of power units is large, and when the internal IGBT module of a single power unit explodes, various components of the IGBT module (such as chips, plastic shells, binding wires, PCB boards welded on the upper part of the IGBT module, etc.) may become explosive debris and fly to the inside and outside of the power unit, causing damage to other components inside or outside the power unit, greatly affecting the safety performance and reliability of the whole machine. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the defects of the prior art, providing a power unit and power electronic equipment, and solving the problem that IGBT module explosion may cause damage to other components inside or outside the power unit.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] On the one hand, the utility model provides a power unit, which comprises a shell, an IGBT module, a capacitor assembly, an insulating plate and a partition plate, the shell is provided with a first mounting area and a second mounting area, the IGBT module is arranged in the first mounting area, the capacitor assembly is arranged in the second mounting area, the shell, the insulating plate and the partition plate constitute an explosion-proof cavity in the first mounting area, and the IGBT module is located in the explosion-proof cavity.

[0007] Further, the shell comprises a top plate, a bottom plate, a front plate, a left side plate and a right side plate, the IGBT module is arranged on the bottom plate, the partition plate is arranged between the top plate and the IGBT module, the insulating plate is arranged between the first mounting area and the second mounting area, and the left side of the insulating plate is bent and extended to the front plate direction to be provided with a left side plate, and the right side of the insulating plate is bent and extended to the front plate direction to be provided with a right side plate.

[0008] Further, the left side plate is provided with a left ventilation hole, the left side plate is located on the inner side of the left side plate and shields the left ventilation hole, and the right side plate is provided with a right ventilation hole, and the right side plate is located on the inner side of the right side plate and shields the right ventilation hole.

[0009] Further, the left side plate is provided with a left ventilation hole, the left side plate is located on the inner side of the left side plate and shields the left ventilation hole, and the right side plate is provided with a right ventilation hole, and the right side plate is located on the inner side of the right side plate and shields the right ventilation hole.

[0010] Further, the capacitor assembly is provided with a clamping plate close to the first mounting area.

[0011] Further, a grid-shaped arc-extinguishing grid is further included, and the mounting position of the grid-shaped arc-extinguishing grid corresponds to the explosion-proof cavity.

[0012] Further, a guide rail is further included, and the guide rail is connected to the outer side of the shell.

[0013] Further, the guide rail is provided with a through hole.

[0014] Further, the inner side of the guide rail is provided with the grid-shaped arc-extinguishing grid at the position of the through hole.

[0015] In another aspect, the utility model also provides a kind of power electronic equipment, including above-mentioned power unit.

[0016] The utility model has the advantages that: a kind of power unit, including shell, IGBT module, capacitor assembly, insulating plate and partition plate, shell is provided with first mounting area and second mounting area, IGBT module is arranged in first mounting area, capacitor assembly is arranged in second mounting area, shell, insulating plate and partition plate form an explosion-proof cavity in first mounting area, and IGBT module is located in explosion-proof cavity.The utility model is limited in a relatively closed explosion-proof cavity by the insulating plate and the partition plate designed and combined with the shell to form an explosion-proof cavity, avoids the spread of debris generated by IGBT module explosion to affect the capacitor assembly inside power unit or other components outside power unit.

[0017] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purpose characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the present application, the following will briefly introduce the drawings needed in the embodiment description, obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0019] Figure 1 A structural schematic view of a power unit without top plate and partition plate is provided for the specific embodiment of the present application.

[0020] Figure 2 A structural schematic view of a power unit without top plate is provided for the specific embodiment of the present application.

[0021] Figure 3 A sectional view in the height direction of a power unit is provided for the specific embodiment of the present application.

[0022] Figure 4 A structural schematic view of a power unit is provided for the specific embodiment of the present application.

[0023] Figure 5 An installation schematic view of a power unit is provided for the specific embodiment of the present application.

[0024] REFERENCE NUMERALS

[0025] 1, shell; 11, front plate; 12, left side plate; 121, left air vent; 13, right side plate; 131, right air vent; 14, bottom plate; 15, top plate; 2, IGBT module; 3, capacitor assembly; 4, insulation plate; 41, left folded edge plate; 42, right folded edge plate; 5, positive busbar; 6, negative busbar; 7, clamping plate; 8, partition plate; 9, guide rail; 91, through hole; 100, first mounting area; 200, second mounting area; 300, explosion-proof cavity; 400, stand column. DETAILED DESCRIPTION

[0026] The technical scheme of the present application will be described in detail below by combining the specific embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0027] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model indicated or implied by the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0028] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0029] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0030] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0032] like Figure 1 - Figure 5 As shown, this embodiment of the present invention provides a power unit, including a housing 1, an IGBT module 2, a capacitor assembly 3, an insulating plate 4, and a partition 8. The housing 1 has a first mounting area 100 and a second mounting area 200. The IGBT module 2 is arranged in the first mounting area 100, and the capacitor assembly 3 is arranged in the second mounting area 200. The capacitor assembly 3 and the IGBT module 2 are connected by positive and negative busbars 6. The positive busbar 5 connects to the positive terminal of the capacitor assembly 3 and the IGBT module 2, and the negative busbar 6 connects to the negative terminal of the capacitor assembly 3 and the IGBT module 2. The positive busbar 5 and the negative busbar 6 are stacked. The insulating plate 4 is placed between the positive busbar 5 and the negative busbar 6. The housing 1, the insulating plate 4, and the partition 8 form an explosion-proof cavity 300 in the first mounting area 100, and the IGBT module 2 is located in the explosion-proof cavity 300.

[0033] This invention uses an insulating plate 4 and a partition plate 8, which are combined with the outer shell 1 to form an explosion-proof cavity 300. This confines the IGBT module 2 in a relatively closed explosion-proof cavity 300, preventing debris generated by the explosion of the IGBT module 2 from spreading outside the explosion-proof cavity 300 and affecting the capacitor assembly 3 inside the power unit or other components outside the power unit.

[0034] like Figures 1-2 As shown, the first mounting area 100 and the second mounting area 200 are determined based on the area required by the IGBT module 2 and the capacitor assembly 3. The area of ​​the first mounting area 100 and the second mounting area 200 can be the same or different. The first mounting area 100 and the second mounting area 200 are arranged opposite each other, with the first mounting area 100 located in front of the second mounting area 200.

[0035] In one embodiment, the housing 1 includes a top plate 15, a bottom plate 14, a front plate 11, a left side plate 12, and a right side plate 13. The IGBT module 2 is disposed on the bottom plate 14. The partition 8 is disposed between the top plate 15 and the IGBT module 2. The insulating plate 4 is disposed between the first mounting area 100 and the second mounting area 200. The side of the insulating plate 4 near the left side plate 12 is bent and extended towards the front plate 11 to form a left folded edge plate 41. The side of the insulating plate 4 near the right side plate 13 is bent and extended towards the front plate 11 to form a right folded edge plate 42.

[0036] The explosion-proof cavity 300 is formed by the partition plate 8, the bottom plate 14, the front plate 11 and the insulation plate 4. If the IGBT module 2 explodes, the debris flying to the left side will be blocked by the left folding side plate 41, the debris flying to the right side will be blocked by the right folding side plate 42, the debris flying upwards will be blocked by the partition plate 8, and the debris flying to the rear side will be blocked by the insulation plate 4. Therefore, even if the IGBT module 2 explodes, it will not cause damage to the capacitor assembly 3 inside the power unit and other components outside the power unit.

[0037] It should be noted that even if a part of the debris flying upwards cannot be completely blocked by the partition plate 8, the top plate 15 located above the partition plate 8 can completely block it, thereby improving the overall blocking.

[0038] It should be further noted that the front plate 11 is in a closed state except for the optical fiber opening and the detection plate LED indicator light opening for installing the optical fiber and the LED indicator light. Therefore, the front plate 11 can completely block the debris flying forward.

[0039] As shown in FIG. 1, Figure 2 The left side plate 12 is provided with a left ventilation hole 121, and the left folding side plate 41 is located inside the left side plate 12 and blocks the left ventilation hole 121. The right side plate 13 is provided with a right ventilation hole 131, and the right folding side plate 42 is located inside the right side plate 13 and blocks the right ventilation hole 131.

[0040] Specifically, the ventilation areas of the left ventilation hole 121 and the right ventilation hole 131 cover the first mounting area 100 and the second mounting area 200. The left ventilation hole 121 and the right ventilation hole 131 corresponding to the position of the first mounting area 100 are mainly used for heat dissipation of the IGBT module 2. The left folding side plate 41 blocks the left ventilation hole 121 to avoid the debris flying to the left side from the left ventilation hole 121 when the IGBT module 2 explodes. The left ventilation hole 121 and the right ventilation hole 131 corresponding to the position of the second mounting area 200 are mainly used for heat dissipation of the capacitor assembly 3. The right folding side plate 42 blocks the right ventilation hole 131 to avoid the debris flying to the right side from the right ventilation hole 131 when the IGBT module 2 explodes.

[0041] In an embodiment, the left folding side plate 41 is spaced apart from the left side plate 12, and the right folding side plate 42 is spaced apart from the right side plate 13. In this way, the high-pressure gas generated by the explosion of the IGBT module 2 can be normally discharged to the outside of the power unit through the left ventilation hole 121 and the right ventilation hole 131.

[0042] In an embodiment, as shown in FIG. 1, Figure 2As shown, the capacitor assembly 3 is provided with a clamping plate 7 near the first mounting area 100, the clamping plate 7 is located behind the insulating plate 4, the height of the insulating plate 4 is greater than the height of the clamping plate 7, in this way, the first mounting area 100 and the second mounting area 200 can be effectively isolated through the clamping plate 7 and the insulating plate 4, so as to avoid the debris generated by the explosion of the IGBT module 2 from spreading into the capacitor assembly 3 of the second mounting area 200.

[0043] In an embodiment, the power unit further comprises grid-shaped arc-extinguishing fins, the installation positions of the grid-shaped arc-extinguishing fins correspond to the explosion-proof cavities 300.

[0044] In an embodiment, the power unit further comprises guide rails 9, the guide rails 9 are connected to the outer side of the shell 1.

[0045] As shown in the drawings, Figures 3-4 The guide rails 9 are arranged on the left and right sides, and are connected to the bottom of the shell 1 of the power unit, and the guide rails 9 play a guiding and supporting role.

[0046] In an embodiment, the guide rails 9 are provided with through holes 91.

[0047] As shown in the drawings, Figures 3-4 The guide rails 9 are provided with two kinds of through holes 91 with different sizes, the positions of the large through holes 91 correspond to the positions of the left and right air vents 121 and 131 near the first mounting area 100, and the positions of the small through holes 91 correspond to the positions of the left and right air vents 121 and 131 near the second mounting area 200, so that the heat dissipation is more favorable.

[0048] In an embodiment, the inner side of the guide rail 9 is provided with grid-shaped arc-extinguishing fins at the position of the through hole 91, of course, in another embodiment, the grid-shaped arc-extinguishing fins can be arranged on the inner side or side of the left and right side plates 12 and 13 of the power unit.

[0049] The utility model further provides a kind of power electronic equipment, including above-mentioned power unit, when multiple, multiple power units are electrically connected in series or parallel mode.

[0050] As shown in the drawings, Figure 5 When installing the whole machine, the power unit is installed on the stand column 400 of the whole machine frame through the guide rail 9 thereof.

[0051] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements should be encompassed within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A power unit, characterized by The power unit comprises a housing, an IGBT module, a capacitor assembly, an insulating plate and a partition plate, the housing is provided with a first mounting area and a second mounting area, the IGBT module is arranged in the first mounting area, the capacitor assembly is arranged in the second mounting area, the housing, the insulating plate and the partition plate constitute an explosion-proof cavity in the first mounting area, and the IGBT module is located in the explosion-proof cavity.

2. A power unit according to claim 1, characterized in that The housing comprises a top plate, a bottom plate, a front plate, a left side plate and a right side plate, the IGBT module is arranged on the bottom plate, the partition plate is arranged between the top plate and the IGBT module, the insulating plate is arranged between the first mounting area and the second mounting area, a left folded edge plate is arranged on the side of the insulating plate close to the left side plate and extends towards the front plate, and a right folded edge plate is arranged on the side of the insulating plate close to the right side plate and extends towards the front plate.

3. A power unit according to claim 2, characterised in that The left side plate is provided with a left ventilation hole, and the left folded edge plate is located on the inner side of the left side plate and covers the left ventilation hole; the right side plate is provided with a right ventilation hole, and the right folded edge plate is located on the inner side of the right side plate and covers the right ventilation hole.

4. A power unit according to claim 3, characterised in that The left folded edge plate is arranged in a spaced manner with the left side plate, and the right folded edge plate is arranged in a spaced manner with the right side plate.

5. A power unit according to claim 1, characterized in that The capacitor assembly is provided with a clamping plate close to the first mounting area.

6. A power unit according to any one of claims 1-5, characterized in that The power unit further comprises a grid-shaped arc-extinguishing grid, and the grid-shaped arc-extinguishing grid is arranged at a position corresponding to the explosion-proof cavity.

7. A power unit according to claim 6, characterised in that The power unit further comprises a guide rail connected to the outer side of the housing.

8. A power unit according to claim 7, characterised in that The guide rail is provided with a through hole.

9. A power unit according to claim 8, characterised in that The inner side of the guide rail is provided with the grid-shaped arc-extinguishing grid at a position corresponding to the through hole.

10. A power electronic device, characterized by The power unit comprises the power unit according to any one of claims 1-9.

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