CN210608899U

CN210608899U - Converter power unit

Info

Publication number: CN210608899U
Application number: CN201921762514.5U
Authority: CN
Inventors: 黄彭发; 李振升; 金传山
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: Sungrow Power Supply Co Ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-05-22
Anticipated expiration: 2029-10-21

Abstract

The utility model provides a converter power unit, converter power unit includes the casing and sets up modular component in the casing, converter power unit still includes the alternating current side and draws forth the copper bar, the alternating current side draw forth the copper bar connect in modular component, and the alternating current side draws forth the copper bar and at least partially lies in the outside of casing. According to this application, converter power unit's interchange side is drawn forth the copper bar and is located the outside of casing to can carry out positive operation and maintain, improve the convenience of assembly efficiency and later maintenance.

Description

Converter power unit

Technical Field

The utility model relates to a power unit field, in particular to converter power unit.

Background

With the increasing popularity of wind power generation and the gradual increase of single-machine power, the converter is used as the core equipment of wind power generation, and the technical development of the converter is always concerned. The power unit is one of the most important electrical components in the converter, and the technical reliability of the converter is directly determined by factors such as performance, heat dissipation, structural layout, size, installation and maintenance performance and the like of the power unit. At present, for the reasons of size reduction, cost reduction, power grade improvement and the like, a power unit with a plurality of parallel IGBT modules arranged on two sides of a liquid cooling plate is more and more widely applied, and is called a double-sided-attached multi-parallel power unit for short. However, the internal air duct, the bus structure, the structural layout and other aspects of the power unit of this type still need to be further optimized to improve the heat dissipation performance, the electrical performance and the like.

The double-sided multi-parallel IGBT module scheme on the current market has the following problems due to the fixing mode of the capacitor relative to the IGBT module: because the number of capacitors in the power unit is large, the capacitors are placed in a centralized manner, and the heat productivity is large, the conventional scheme mainly increases the size of the liquid cooling plate for heat dissipation, but the scheme has high cost or naturally dissipates heat, so that the temperature of the capacitors is high, and the service life of the capacitors is not facilitated; the layout space of the driving board and heating devices such as capacitors are located in the same area, so that the protection of the driving board is poor, and the damage risk of the driving board is increased; the alternating current side leading-out copper bar of the power unit cannot be disassembled and maintained on the front side.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a converter power unit, its convenience that can improve assembly efficiency and later maintenance.

In order to achieve the above object, the present application provides a converter power unit, the converter power unit includes a housing and a module assembly disposed in the housing, the converter power unit further includes an ac side leading-out copper bar, the ac side leading-out copper bar is connected to the module assembly, and the ac side leading-out copper bar is at least partially located outside the housing.

Further, the housing includes: a support frame including a first frame and a second frame connected to the first frame, the module assembly being mounted on the first frame, the first frame and the second frame having different widths; and a protection plate connected with the first frame.

Further, the width of the first frame is smaller than the width of the second frame.

Further, the casing still includes the air inlet board, the air inlet board sets up first frame with the junction of second frame, the air inlet board is provided with a plurality of perforating holes, and, first frame, guard plate and the air inlet board forms first accommodation space.

Furthermore, an opening through which the alternating current side lead-out copper bar extends outwards from the inside of the shell is formed in the protection plate.

Furthermore, the converter power unit further comprises a capacitor arranged in the shell and positioned above the module assembly, the capacitor is connected with the module assembly, the shell further comprises a capacitor fixing plate used for fixing the capacitor, the capacitor fixing plate is connected with the second frame, the air inlet plate and the capacitor fixing plate form a second accommodating space, and the capacitor is positioned in the second accommodating space.

Further, the module assembly further comprises a driving plate, and the driving plate is located in the first accommodating space.

Further, the module assembly further comprises a liquid cooling plate for dissipating heat of the module assembly.

Furthermore, the alternating current side lead-out copper bar is provided with a plurality of connecting holes, and the connecting holes face to the right front of the plane where the supporting frame is located.

Further, the module group comprises a plurality of IGBT modules which are connected in parallel, and the IGBT modules are fixed on the liquid cooling plate side by side.

Through the utility model discloses, the copper bar is drawn forth to the interchange side of power unit and is located the outside of casing to can openly operate and maintain, improve assembly efficiency and later maintenance's convenience.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a perspective view of a wind energy converter power unit according to a preferred embodiment of the present application;

FIG. 2 shows a front view of FIG. 1;

FIG. 3 shows a side view of FIG. 1;

FIG. 4 shows a top view of FIG. 1;

FIG. 5 shows an exploded view of the power unit of the wind energy converter shown in FIG. 1;

FIG. 6 shows an internal block diagram of the power unit of the wind energy converter shown in FIG. 1;

fig. 7 shows a wind tunnel schematic of the wind energy converter power unit shown in fig. 1.

Wherein the figures include the following reference numerals:

1. a module component; 2. a capacitor; 3. a bus bar; 4. copper bars are led out from the alternating current side; 5. a support frame; 6. a capacitor fixing plate; 7. an air inlet plate; 8. a protection plate; 9. a frame top plate; 11. an IGBT module; 12. a drive plate; 13. copper bars are connected in parallel; 14. a liquid-cooled plate; 15. a liquid cooling plate fixing frame; 41. connecting holes; 51. a first frame; 52. a second frame; 81. and (4) opening.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

The utility model provides a converter power unit, converter power unit includes the casing and sets up modular component in the casing, converter power unit still includes the alternating current side and draws forth the copper bar, the alternating current side draw forth the copper bar connect in modular component, and the alternating current side draws forth the copper bar and at least partially lies in the outside of casing.

According to the converter power unit of this application, through making the interchange side draw forth the outside that the copper bar is located the casing to can carry out positive operation and maintain, improve the convenience of assembly efficiency and later maintenance.

The converter power unit of the present application is described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 5, the converter power unit is mainly divided into two parts, namely a left part and a right part, and the two parts are arranged in a mirror image relationship. The converter power unit comprises a shell and a module assembly 1 arranged in the shell, wherein the shell is formed by a supporting frame 5, a capacitance fixing plate 6, an air inlet plate 7, a protection plate 8, a frame top plate 9 and the like, the module assembly 1, a capacitor 2 and the like are contained in the shell, and a bus 3 connects a plurality of capacitors 2 in parallel and connects the capacitors 2 with the module assembly 1.

As shown in fig. 5, the support frame 5 includes a first frame 51 and a second frame 52 connected to the first frame 51, the module assembly 1 is mounted on the first frame 51 (lower frame) of the support frame 5, the shielding plates 8 are positioned on both sides of the lower portion of the converter power unit, the shielding plates 8 are connected to the first frame 51 of the support frame 5, the capacitor fixing plates 6 are positioned on both sides of the upper portion of the converter power unit, and the capacitor fixing plates 6 are connected to the second frame 52 (upper frame) of the support frame 5. The top of the converter power unit is provided with a frame top plate 9, and the frame top plate 9 is connected with a second frame 52 and capacitor fixing plates 6 positioned on two sides of the upper part of the converter power unit. The capacitors 2 are arranged above the supporting frame 5 and the module assemblies 1, distributed and connected with the bus bars 3, and fixed on the capacitor fixing plate 6. Specifically, the capacitor 2 is mounted above the support frame 5 by a capacitor fixing plate 6 via a fixing member. An air inlet plate 7 is provided at a junction of the first frame 51 and the second frame 52 of the support frame 5, the air inlet plate 7 is provided with a plurality of through holes, and the air inlet plate 7 is connected with the second frame 52, the capacitor fixing plates 6 at both sides and the frame top plate 9 at the upper portion to form an upper receiving space (i.e., a second receiving space) in which the capacitor 2 is received. The air inlet plate 7 is connected with the first frame 51 and the shielding plates 8 at both sides of the lower portion of the converter power unit to form a lower receiving space (i.e., a first receiving space) in which the module assembly 1 is received. Therefore, with the above structure, the converter power unit is formed with a space for accommodating the module assembly 1 and the capacitor 2.

As shown in fig. 6, a schematic structural view of the module assembly 1 is shown. As shown in the figure, the module assembly 1 mainly includes an IGBT module 11, a driving board 12, a parallel copper bar 13, a liquid cooling board 14, and a liquid cooling board fixing frame 15. The IGBT modules 11 are fixed on the liquid cooling plate 14 side by side, and the IGBT modules 11 are arranged on two sides of the liquid cooling plate 14; the parallel copper bar 13 connects one side of the IGBT module 11 in parallel; the driving plate 12 is positioned on the side surface of the IGBT module 11; the liquid cooling plate fixing frame 15 is located on two side faces of the liquid cooling plate 14 and used for fixing the liquid cooling plate 14.

Through the structure setting of this application, the heat that IGBT module 11 produced obtains dissipating through liquid cooling board 14 to, drive plate 12 holds in lower part accommodation space, and electric capacity 2 holds in upper portion accommodation space, and drive plate 12 sets up respectively with electric capacity 2 in the accommodation space of difference, thereby, drive plate 12 can obtain solitary protection, has avoided other heating device such as electric capacity to the influence of drive plate 12, has improved the protection to drive plate 12.

The module assembly 1 is fixed on a first frame 51 below the supporting frame 5 through the liquid cooling plate fixing frame 15, the alternating current side leading-out copper bar 4 is fixed on the parallel copper bar 13, and the alternating current side leading-out copper bar 4 is at least partially positioned outside the shell, namely, the alternating current side leading-out copper bar 4 is at least partially exposed outside the shell. As shown in fig. 5, the ac side leading-out copper bar 4 is disposed at the lower portion of the converter power unit and connected to the parallel copper bar 13, an opening 81 through which the ac side leading-out copper bar 4 protrudes from the inside of the housing is disposed on the protection plate 8, the ac side leading-out copper bar 4 penetrates out of the opening 81 of the protection plate 8 and is located at the outer side of the protection plate 8, and the ac side leading-out copper bar 4 is located at both sides of the module assembly 1, and the connection hole 41 faces the front of the installation position, that is, as shown in fig. 6, the connection hole 41 faces the front of the plane where the support frame 5 is located.

According to this application, draw forth copper bar 4 through the side of exchanging with power unit and be located module component 1's both sides to be located the outside of casing, connecting hole 41 is towards the dead ahead in installation position, thereby, can carry out the front operation and maintain the device to it, improved assembly efficiency and later maintenance's convenience.

In this application, bus 3 is conventional pressfitting bus 3 to parallelly connect a plurality of electric capacity 2, and the terminal of the IGBT module 11 that places side by side is connected to the claw that stretches out.

As shown in fig. 5, the supporting frame 5 has a structure form that is wide at the top and narrow at the bottom (i.e., the second frame 52 is wide and the first frame 51 is narrow), the width of the first frame 51 matches the width of the module assembly 1, and the width of the second frame 52 matches the combined width of the two sets of capacitors 2; the air inlet plate 7 is located at the transition between the width of the support frame 5, i.e. the connection between the first frame 51 and the second frame 52.

The protection plate 8 is located the lateral part of drive plate 12, cooperates air inlet plate 7 and braced frame 5, wraps up one side of module component 1. As described above, the shielding plates 8 of both sides form the lower receiving space for receiving the module assembly 1 in cooperation with the air inlet plate 7 and the first frame 51 of the support frame 5.

Fig. 7 shows a wind tunnel schematic of the wind energy converter power unit shown in fig. 1. As shown in fig. 7, the air flow passes through the air inlet plate 7 from bottom to top and enters the upper accommodating space for accommodating the capacitor 2, thereby ensuring the natural heat dissipation of the capacitor 2.

When the converter power unit works, current is led out of a copper bar from the alternating current side and flows in, after passing through the parallel copper bars, the current dispersedly enters the parallel IGBT modules, then the current is gathered through the bus and the capacitor, and finally the current flows out through the bus end above the bus to form primary current conversion. When the converter power unit operates, the capacitor generates heat, cold air flows in from the lower part of the air inlet plate, hot air flows out from the top plate of the upper frame, and the heat is taken away, so that the heat dissipation of the capacitor is ensured.

According to the power unit structure of the converter, the driving board is protected in one area independently, the influence of other heating devices such as a capacitor on the driving board is avoided, and the protection of the driving board is improved; the alternating current side lead-out copper bars are positioned on two sides of the module assembly and positioned outside the shell, and the connecting holes face to the right front of the mounting direction, so that the front operation and maintenance can be performed on the connecting holes, and the assembly efficiency and the convenience of later maintenance are improved; the natural heat dissipation mode of air-out on the air inlet below the electric capacity heat dissipation wind channel structure to guaranteed that the electric capacity group can directly carry out the heat exchange with the ambient air current, improved natural radiating efficiency greatly, avoided the demand to the liquid cooling board, the cost is reduced.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Converter power cell, characterized in that it comprises a housing and a module assembly (1) arranged in said housing,

the converter power unit further comprises an alternating current side lead-out copper bar (4), the alternating current side lead-out copper bar (4) is connected to the module assembly (1), and at least part of the alternating current side lead-out copper bar (4) is located outside the shell.

2. The converter power cell of claim 1, wherein said housing comprises:

a support frame (5), said support frame (5) comprising a first frame (51) and a second frame (52) connected to said first frame (51), said module assembly (1) being mounted on said first frame (51), said first frame (51) and said second frame (52) having different widths; and

a shield plate (8), the shield plate (8) being connected with the first frame (51).

3. Converter power cell according to claim 2, characterized in that the width of the first frame (51) is smaller than the width of the second frame (52).

4. Converter power cell according to claim 3, characterized in that the housing further comprises an air inlet plate (7), the air inlet plate (7) being arranged at the junction of the first frame (51) and the second frame (52), the air inlet plate (7) being provided with a plurality of through holes, and the first frame (51), the shielding plate (8) and the air inlet plate (7) forming a first accommodation space.

5. Converter power unit according to claim 2, characterized in that the shielding plate (8) is provided with openings (81) for the ac-side outgoing copper bars (4) to protrude outwards from the interior of the housing.

6. The converter power unit according to claim 4, characterized in that it further comprises a capacitor (2) arranged in the housing above the module assembly (1), said capacitor (2) being connected to the module assembly (1), said housing further comprising a capacitor fixing plate (6) for fixing said capacitor (2), said capacitor fixing plate (6) being connected to the second frame (52), and said second frame (52), said air inlet plate (7) and said capacitor fixing plate (6) forming a second receiving space, said capacitor (2) being located in said second receiving space.

7. The converter power unit according to claim 6, characterized in that the module assembly (1) further comprises a drive plate (12), the drive plate (12) being located in the first accommodation space.

8. Converter power cell according to claim 7, characterized in that the module assembly (1) further comprises a liquid cooling plate (14) for heat dissipation of the module assembly (1).

9. Converter power unit according to claim 2, characterized in that the ac side outgoing copper bars (4) are provided with a plurality of connection holes (41), the connection holes (41) being directed directly in front of the plane of the support frame (5).

10. Converter power cell according to claim 8, characterized in that the module assembly (1) comprises a plurality of parallel IGBT modules (11), the IGBT modules (11) being fixed side by side on the liquid-cooled plate (14).