CN217240571U

CN217240571U - Frequency converter power unit

Info

Publication number: CN217240571U
Application number: CN202220415052.5U
Authority: CN
Inventors: 汤惠崴; 王丰; 冯恒昌; 霍强; 王军
Original assignee: Beijing Hekang Xinneng Frequency Conversion Technology Co ltd
Current assignee: Beijing Hekang Xinneng Frequency Conversion Technology Co ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-08-19
Anticipated expiration: 2032-02-28

Abstract

The utility model discloses a converter power unit, include: the air duct is arranged in the shell and positioned at one end of the shell in a first direction, the air duct extends along a second direction, the air duct is provided with a first air inlet and a first air outlet which are respectively positioned at two ends of the shell in the second direction, and the first direction and the second direction are vertical in the horizontal direction; the radiator assembly is arranged in the shell and comprises a radiator main body and components which are arranged in a first direction, the components are arranged on the radiator main body, at least part of the radiator main body is positioned in the air duct, and the components are arranged outside the air duct; and the capacitor assembly is arranged in the shell and positioned outside the air duct, and the capacitor assembly and the components are arranged in the second direction and positioned on the same side of the air duct. According to the utility model discloses a converter power unit, heat dispersion is good, can reduce cost simultaneously, reduces radiator assembly's weight.

Description

Frequency converter power unit

Technical Field

The utility model belongs to the technical field of the converter technique and specifically relates to a converter power unit is related to.

Background

In the related art, the heat dissipation of the frequency converter is poor, the power of the frequency converter is improved, the cost is high, the relative size is large, and the use requirement cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a converter power unit, converter power unit heat dispersion is good, can reduce cost simultaneously, reduces radiator assembly's weight.

According to the utility model discloses converter power unit, include: the air duct is arranged in the shell and positioned at one end of the shell in a first direction, the air duct extends along a second direction, the air duct is provided with a first air inlet and a first air outlet which are respectively positioned at two ends of the shell in the second direction, and the first direction and the second direction are vertical in the horizontal direction; the radiator assembly is arranged in the shell and comprises a radiator main body and components which are arranged in the first direction, the components are arranged on the radiator main body, at least part of the radiator main body is positioned in the air duct, and the components are arranged outside the air duct; the capacitor assembly is arranged in the shell and located outside the air duct, and the capacitor assembly and the components are arranged in the second direction and located on the same side of the air duct.

According to the utility model discloses converter power unit, the air flue is injectd to one end through first direction in the casing, make radiator subassembly and capacitor assembly arrange on the second direction, and make at least part of radiator subassembly's radiator main part be located the air flue, capacitor assembly and components and parts are located the air flue outside and lie in same one side in air flue, and set up first air intake and the first air outlet with the air flue intercommunication respectively at the both ends of the second direction of casing, make the air current can follow first air intake entering air flue, flow through and flow out from first air outlet behind the radiator main part, the heat dissipation to the radiator main part has been realized, thereby realized the heat dissipation to components and parts, realized the heat dissipation to capacitor assembly simultaneously, heat dispersion is good, simultaneously can reduce cost, reduce radiator assembly's weight.

According to some embodiments of the utility model, be equipped with the baffle in the casing the radiator main part includes: the heat dissipation plate and the partition plate are arranged in a second direction and are connected with each other, the heat dissipation plate, the partition plate and the shell define the air channel, the component is installed on one side, far away from the air channel, of the heat dissipation plate, and the capacitor assembly is located on one side, far away from the air channel, of the partition plate; the radiating fins are arranged on one side, far away from the components, of the radiating plate and are arranged in the air duct. According to some embodiments of the invention, the heat sink assembly is located on one side of the capacitor assembly facing the third wall.

According to some embodiments of the present invention, the heat sink assembly is disposed on one side of the capacitor assembly that is close to the first air inlet.

According to some embodiments of the present invention, the air duct is in the one end of casing third direction extends to the other end, the third direction with first direction with the second direction is all perpendicular.

According to some embodiments of the invention, the housing comprises a first wall and a second wall opposite to each other in a first direction, and a third wall and a fourth wall opposite to each other in a second direction, the first wall is configured as a partial wall of the air duct, one of the third wall and the fourth wall is provided with the first air inlet, the other is provided with the first air outlet, the radiator assembly is arranged at a side of the capacitor assembly close to the third wall, an end of the second wall close to the fourth wall is spaced apart from the fourth wall to form an avoidance gap, the capacitor assembly comprises a capacitor support assembly supporting a capacitor, the capacitor support assembly comprises an outer plate opposite to the avoidance gap, the capacitor is arranged at a side of the outer plate facing the first wall, the outer plate is provided with a plurality of spaced apart second air inlets, the fourth wall surface is provided with a plurality of spaced apart second air outlets.

In some embodiments of the present invention, the capacitor support assembly further includes an inner plate, the inner plate is disposed in parallel with the outer plate and located toward one side of the first wall surface, the inner plate and the outer plate define a channel, and the second air inlet and the second air outlet are respectively communicated with the channel.

According to some embodiments of the invention, the capacitor assembly comprises: a capacitive support assembly; the capacitors are arranged on the capacitor supporting assembly, and connecting contacts of the capacitors are approximately flush with the mounting surface of the component in the first direction.

In some embodiments of the present invention, the connection contact of the capacitor is located at an end of the capacitor away from the capacitor support assembly.

According to some embodiments of the utility model, components and parts include IGBT (insulated Gate Bipolar transistor) and rectifier bridge, the IGBT with the rectifier bridge is arranged in proper order in the third direction, the third direction with first direction with the second direction is all perpendicular, the IGBT is at least two, the IGBT is in arrange in the third direction, the rectifier bridge is at least two, the rectifier bridge is in arrange in the second direction.

In some embodiments of the present invention, the IGBT and the rectifier bridge with the electric capacity is respectively connected through a laminated busbar, the laminated busbar includes: a positive electrode row including a positive electrode row main body portion and a positive electrode row connecting portion connected; the negative pole row, the negative pole row is including negative pole row main part and the negative pole row connecting portion of connecting, positive pole row main part with the negative pole row main part is range upon range of the setting just positive pole row main part with be equipped with the insulating layer between the negative pole row main part, positive pole row connecting portion with the range upon range of setting of negative pole row connecting portion, just positive pole row connecting portion with be equipped with the insulating layer between the negative pole row connecting portion, positive pole row main part with negative pole row main part respectively with the electric capacity is connected, positive pole row connecting portion with negative pole row connecting portion respectively with the IGBT is connected.

According to some embodiments of the present invention, further comprising: the control panel assembly is arranged on one side, away from the air duct, of the component and is located on one side, facing the capacitor assembly, of the component, and the component is connected with the control panel assembly.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a perspective view of a frequency converter power cell according to an embodiment of the present invention;

fig. 2 is a front view of a converter power cell according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a perspective view of a converter power cell according to an embodiment of the present invention, with a portion of the housing hidden;

fig. 5 is a front view of a converter power cell according to an embodiment of the present invention, with a portion of the housing hidden;

fig. 6 is a perspective view of a capacitor assembly and a heat sink assembly of a converter power cell in accordance with an embodiment of the present invention;

fig. 7 is a perspective view of a heat sink assembly of an inverter power cell in accordance with an embodiment of the present invention;

fig. 8 is a front view of a heat sink assembly of an inverter power cell in accordance with an embodiment of the present invention;

fig. 9 is a perspective view of a capacitor assembly of a frequency converter power cell in accordance with an embodiment of the present invention;

fig. 10 is a front view of a capacitor assembly of a frequency converter power cell in accordance with an embodiment of the present invention;

fig. 11 is a perspective view of a laminated busbar of a converter power unit according to an embodiment of the present invention;

fig. 12 is a front view of a laminated busbar of a converter power cell according to an embodiment of the present invention;

fig. 13 is a perspective view of a control plate assembly of a frequency converter power cell in accordance with an embodiment of the present invention;

fig. 14 is a front view of a control board assembly of a frequency converter power cell in accordance with an embodiment of the present invention;

fig. 15 is a perspective view of a housing of a converter power cell according to an embodiment of the present invention.

Reference numerals:

100. a variable frequency power unit;

1. a housing; 11. a first wall surface; 12. a second wall surface; 13. a third wall surface; 131. a first air inlet; 14. a fourth wall surface; 141. a first air outlet; 142. a second air outlet; 15. a top wall; 16. a bottom wall; 17. an air duct; 18. avoiding the notch; 19. mounting a bracket; 191. a partition plate;

2. a heat sink assembly; 21. a heat sink body; 211. a heat dissipation plate; 212. a heat dissipating fin; 22. a component; 221. an IGBT; 222. a rectifier bridge;

3. a capacitive component; 31. a capacitive support assembly; 311. an outer plate; 3111. a second air inlet; 313. an inner plate; 314. a top plate; 315. a base plate; 316. a channel; 32. a capacitor; 321. connecting the contacts;

4. laminating the busbars; 41. a positive electrode row; 411. a positive electrode row main body portion; 412. a positive electrode row connecting part; 42. a negative electrode row; 421. a negative electrode row main body portion; 422. a negative electrode row connecting part; 43. an electrical connection;

5. a control board assembly; 51. a control panel bracket; 52. an integrated plate; 53. a bypass plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that 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", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The following describes a converter power unit 100 according to an embodiment of the present invention with reference to the drawings.

As shown in fig. 1-3, a frequency converter power unit 100 according to an embodiment of the present invention includes: a housing 1, a heat sink assembly 2 and a capacitor assembly 3.

Specifically, an air duct 17 is disposed in the housing 1, the air duct 17 is located at one end of the housing 1 in the first direction, the air duct 17 extends along the second direction, the air duct 17 has a first air inlet 131 and a first air outlet 141 respectively located at two ends of the housing 1 in the second direction, and the first direction and the second direction are perpendicular to each other in the horizontal direction. It can be understood that the air flow enters from the first air inlet 131, flows toward the first air outlet 141 along the second direction, and finally flows out from the first air outlet 141.

As shown in fig. 2 and 3 in conjunction with fig. 6 to 8, the heat sink assembly 2 is provided in the housing 1, and the heat sink assembly 2 includes a heat sink main body 21 arranged in the first direction and a component 22 mounted on the heat sink main body 21. It is understood that the heat sink assembly 2 includes a heat sink main body 21 and a component 22, the component 22 is mounted on the heat sink main body 21, and the heat sink main body 21 and the component 22 are arranged in the first direction. Radiator main part 21 can dispel the heat to components and parts 22, and components and parts 22 can transmit to radiator main part 21 on the heat that produces in the course of the work to dispel away through radiator main part 21, realize the heat dissipation to components and parts 22.

At least a portion of the heat sink body 21 is disposed within the air duct 17, and the component 22 is disposed outside the air duct 17, it being understood that the component 22 and the air duct 17 are arranged in a first direction. External air flow can enter the air duct 17 through the first air inlet 131, and the air flow flows through the heat sink main body 21 to take away heat on the heat sink main body 21, so that heat dissipation of the component 22 is realized, and the heat dissipation efficiency of the frequency converter power unit 100 is improved.

As shown in fig. 2 and 3 in combination with fig. 6, 9 and 10, the capacitor assembly 3 is disposed in the housing 1 and outside the air duct 17, and the capacitor assembly 3 and the component 22 are arranged in the second direction, that is, the capacitor assembly 3 and the heat sink assembly 2 are arranged in the second direction. It will be appreciated that the capacitor assembly 3 and the component 22 are located on the same side of the air duct 17.

Outside air current can pass through first air intake 131 and get into in the casing 1, the air current flows through radiator main part 21, take away the heat on the radiator main part 21, the realization is to components and parts 22 heat dissipation, simultaneously capacitor assembly 3's partial heat can transmit to on the wall in wind channel 17, when the air current flows through the wind channel 17 that is close to capacitor assembly 3, can take away the heat on partial capacitor assembly 3, also play certain heat dissipation effect to capacitor assembly 3, the radiating efficiency of high-voltage inverter power unit 100 has been improved.

In addition, because the heat dissipation efficiency of the frequency converter power unit 100 is improved, the current utilization rate of the components 22 of the frequency converter power unit 100 is improved, so that the components 22 with low power can be used, the cost of the components 22 is reduced, and in addition, under the same heat dissipation performance, the size of the heat radiator main body 21 can be reduced, and the weight of the heat radiator main body 21 can be reduced.

According to the inverter power unit 100 of the embodiment of the present invention, the radiator module 2 and the capacitor module 3 are arranged in the second direction by defining the air passage 17 at one end of the first direction in the case 1, and at least part of the radiator main body 21 of the radiator assembly 2 is positioned in the air duct 17, the capacitor assembly 3 and the component 22 are positioned outside the air duct 17 and on the same side of the air duct 17, and a first air inlet 131 and a first air outlet 141 communicated with the air duct 17 are respectively arranged at both ends of the housing 1 in the second direction, the air flow can enter the air duct 17 from the first air inlet 131, and flow out from the first air outlet 141 after flowing through the heat sink main body 21, so as to realize heat dissipation of the heat sink main body 21, therefore, the heat dissipation of the component 22 and the heat dissipation of the capacitor assembly 3 are realized, the heat dissipation performance is good, the cost can be reduced, and the weight of the radiator assembly 2 can be reduced.

In some embodiments of the present invention, as shown in fig. 3 and with reference to fig. 7, a partition 191 is disposed in the housing 1, the heat sink main body 21 includes a heat dissipation plate 211 and heat dissipation fins 212, the heat dissipation plate 211 and the partition 191 are arranged in the second direction and connected to each other, and the heat dissipation plate 211, the partition 191 and the housing 1 partially define the air duct 17. The component 22 (including the IGBT221 and the rectifier bridge 222 described below) is mounted on the side of the heat dissipation plate 211 away from the air duct 17, and accordingly, the capacitor module 3 is located on the side of the partition 191 away from the air duct 17, the heat dissipation fins 212 are located on the side of the heat dissipation plate 211 away from the component 22, and the heat dissipation fins 212 are located in the air duct 17, thereby facilitating the mounting of the component 22 and the heat dissipation of the component 22.

Specifically, the heat generated by the component 22 in the working process can be transferred to the heat dissipation plate 211, the heat on the heat dissipation plate 211 can be transferred to the heat dissipation fins 212, when the airflow flows through the heat dissipation fins 212, the heat dissipation fins 212 are located in the air duct 17, the airflow flowing in from the first air inlet 131 flows through the heat dissipation fins 212, the heat on the heat dissipation fins 212 is taken away, and the airflow flows out from the first air outlet 141, so that the heat dissipation of the heat dissipation fins 212 is realized, and the heat dissipation of the component 22 is realized. In addition, when the air flow flows through the air duct 17, a part of heat on the capacitor assembly 3 can be taken away, which is helpful for heat dissipation of the capacitor assembly 3, so that the heat dissipation performance of the frequency converter power unit 100 can be improved.

As shown in fig. 7, the heat dissipating fins 212 are plural and spaced apart in a third direction, which is perpendicular to both the first direction and the second direction. It is to be understood that each of the heat radiating fins 212 may be formed in a plate-like structure parallel to the first and second directions and perpendicular to the third direction. Therefore, an airflow circulation gap is defined between two adjacent heat dissipation fins 212, the extending direction of the airflow circulation gap is the same as the airflow flowing direction, the plurality of heat dissipation fins 212 are prevented from being spaced along the second direction to block the airflow, and the good heat dissipation performance of the heat sink main body 21 is ensured.

Further, as shown in fig. 3, one end of the heat dissipating fin 212 remote from the heat dissipating plate 211 approaches the housing 1. For example, the distance between the end of the heat dissipation fin 212 remote from the heat dissipation plate 211 and the housing 1 may be 1-3mm, for example 2 mm. Therefore, the length of the radiating fins 212 in the first direction can be improved to the greatest extent, and the radiating performance of the radiator main body 21 is improved, so that the radiating performance of the component 22 is improved, the radiating performance of the frequency converter power unit 100 is improved, meanwhile, interference between the shell 1 and the radiating fins 212 can be avoided, and convenience in assembly is guaranteed. In addition, the heat dissipation fins 212 approach the housing 1, and heat on the heat dissipation fins 212 can also be transferred to the housing 1, so that the heat is dissipated to the outside of the housing 1 through the housing 1, and the heat dissipation performance is further improved.

In some embodiments of the present invention, as shown in fig. 3, the heat sink assembly 2 is disposed on a side of the capacitor assembly 3 close to the first air inlet 131. It is understood that the heat sink assembly 2 is close to the first air inlet 131 relative to the capacitor assembly 3, the capacitor assembly 3 is close to the first air outlet 141 relative to the heat sink assembly 2, the capacitor assembly 3 is close to the first air outlet 141, and the heat sink assembly 2 is close to the first air inlet 131. The airflow entering from the first air inlet 131 contacts with the heat sink body 21 first and takes away heat of the heat sink body 21, and the airflow flowing through the heat sink body 21 flows into the air duct 17 opposite to the capacitor module 3 to take away part of heat of the capacitor module 3, and finally flows out from the first air outlet 141. Therefore, the airflow entering the first air inlet 131 can be firstly contacted with the radiator main body 21 with larger heat productivity, so that the heat radiation of the radiator assembly 2 can be better realized, and the heat radiation performance of the frequency converter is improved.

Further, as shown in fig. 3 and 4, one end of the heat dissipating fin 212 in the second direction extends to the first intake vent 131. This can maximize the length of the heat radiation fins 212 in the second direction, and improve the heat radiation performance of the heat sink main body 21, thereby improving the heat radiation performance of the component 22, and further improving the heat radiation performance of the inverter power unit 100.

In some embodiments of the present invention, the air duct 17 extends from one end of the housing 1 in a third direction to the other end, the third direction being perpendicular to both the first direction and the second direction. Therefore, the height of the air duct 17 in the third direction can be increased, so that the heat dissipation effect of the heat sink main body 21 can be improved, the heat dissipation effect of the component 22 can be improved, and the heat dissipation effect of the capacitor assembly 3 can be improved.

Further, in the example shown in fig. 1 and 4, one end of the first air inlet 131 in the third direction of the housing 1 extends to the other end, one end of the first air outlet 141 in the third direction of the housing 1 extends to the other end, and the heights of the first air inlet 131 and the first air outlet 141 in the third direction are the same as the heights of the air duct 17, so that the air inlet is facilitated, the air outlet is facilitated, the heat dissipation is facilitated, and the heat dissipation efficiency of the component 22 and the capacitor assembly 3 is improved.

In some embodiments of the present invention, as shown in fig. 1-3, the housing 1 includes a first wall 11 and a second wall 12 opposite to each other in a first direction, and a third wall 13 and a fourth wall 14 opposite to each other in a second direction, the first direction and the second direction being perpendicular to each other. Specifically, in the example shown in fig. 1, the housing 1 is formed in a rectangular parallelepiped shape, the housing 1 includes a bottom wall 16, a top wall 15, and a side wall provided between the bottom wall 16 and the top wall 15, the first wall surface 11, the second wall surface 12, the third wall surface 13, and the fourth wall surface 14 may be formed as side walls of the housing 1, and the first wall surface 11, the third wall surface 13, the second wall surface 12, and the fourth wall surface 14 are arranged in this order in the circumferential direction of the housing 1.

The first wall 11 is configured as a partial wall of the air duct 17, and in conjunction with fig. 1 and 3, the partition 191, the heat radiating plate 211, the first wall 11, a portion of the top wall 15 adjacent to the first wall 11, and a portion of the bottom wall 16 adjacent to the first wall 11 define the air duct 17. The component 22 is disposed on the side of the heat sink body 21 facing the second wall 12, and it is understood that the heat sink body 21 and the component 22 are arranged along the first direction between the first wall 11 and the second wall 12, the heat sink body 21 is close to the first wall 11 relative to the component 22, and the component 22 is close to the second wall 12 relative to the heat sink body 21. Specifically, the component 22 is located on the side of the heat dissipation plate 211 facing the second wall surface 12, the heat dissipation fins 212 are located on the side of the heat dissipation plate 211 away from the component 22, that is, the heat dissipation fins 212 are located on the side of the heat dissipation plate 211 facing the first wall surface 11, and the heat dissipation fins 212 are located in the air duct 17.

The capacitor module 3 and the heat sink module 2 are arranged in a direction from the third wall 13 to the fourth wall 14, and the capacitor module 3 may be located on the side of the heat sink module 2 close to the third wall 13 or the side of the heat sink module 2 close to the fourth wall 14. In the example shown in fig. 3, the heat sink assembly 2 is provided on the side of the capacitor assembly 3 facing the third wall 13.

With reference to fig. 3, a first air inlet 131 is disposed on one of the third wall 13 and the fourth wall 14, and a first air outlet 141 is disposed on the other one of the third wall 13 and the fourth wall 14, the third wall 13 is disposed with the first air inlet 131 opposite to the air duct 17, the fourth wall 14 is disposed with the first air outlet 141 opposite to the air duct 17, and one end of the heat dissipation fin 212 close to the third wall 13 extends to the first air inlet 131. The first air inlet 131 extends to the other end at one end of the third direction of the third wall surface 13, the third direction is perpendicular to the first direction and the second direction, specifically, the up-down direction shown in fig. 1, and the first air outlet 141 extends to the other end at one end of the third direction of the fourth wall surface 14, so that the air flow entering is facilitated, the air flow discharge is facilitated, the heat dissipation is facilitated, and the heat dissipation efficiency of the component 22 and the capacitor module 3 is improved.

Further, as shown in fig. 1-3, an end of the second wall 12 adjacent the fourth wall 14 is spaced from the fourth wall 14 to form an escape notch 18. It will be appreciated that the end of the second wall 12 remote from the third wall 13 is spaced from the fourth wall 14, and that the end of the second wall 12 remote from the third wall 13, the fourth wall 14, the top wall 15 and the bottom wall 16 define an escape aperture 18 therebetween. The capacitor assembly 3 comprises a capacitor supporting assembly 31 for supporting the capacitor 32, the capacitor supporting assembly 31 comprises an outer plate 311 opposite to the avoidance notch 18, the capacitor 32 is arranged on one side, facing the first wall surface 11, of the outer plate 311, the outer plate 311 can seal the avoidance notch 18, and therefore the sealing of the frequency converter power unit 100 is achieved, parts in the frequency converter power unit 100 can be protected, and the effects of dust prevention and the like are achieved.

The outer plate 311 is provided with a plurality of spaced apart second inlets 3111, the fourth wall 14 is provided with a plurality of spaced apart second outlets 142, and the second outlets 142 are located on a side of the first outlet 141 facing the second wall 12. The air current can get into in casing 1 by second air intake 3111 to contact with capacitor module 3, take away the heat on the capacitor module 3, can discharge from second air outlet 142 at last, realize the heat dissipation to capacitor module 3, improve converter power unit 100's heat dispersion.

Alternatively, as shown in fig. 1, the second intake port 3111 is elongated extending along the third direction, and the second outtake port 142 is elongated extending along the first direction.

In some embodiments of the present invention, as shown in fig. 3 and 9, the capacitor support assembly 31 further includes an inner plate 313, the inner plate 313 is disposed in parallel with the outer plate 311 and located on one side of the outer plate 311 facing the first wall 11, wherein the inner plate 313 may be connected with the outer plate 311 through an intermediate member, thereby fixing the inner plate 313. A channel 316 used for dissipating heat of the capacitor assembly 3 is defined between the inner plate 313 and the outer plate 311, and the inner plate 313 can be used for separating the air duct 17 and the channel 316 to make the two independent from each other, the second air inlet 3111 and the second air outlet 142 are respectively communicated with the channel 316, the air flow entering from the first air inlet 131 is discharged from the first air outlet 141, the air flow entering from the second air inlet 3111 is discharged from the second air outlet 142, thereby avoiding the intersection of the two air flows, having small air flow resistance, and under the same heat dissipation air volume, the air speed in the air duct 17 and the air speed in the channel 316 are high, and improving the heat dissipation effect of the frequency converter power unit 100.

In addition, as shown in fig. 9, the capacitor support assembly 31 further includes a top plate 314 and a bottom plate 315, the top plate 314 and the bottom plate 315 being connected to top and bottom ends of the outer plate 311, respectively, and an inner plate 313 may be connected to the top plate 314 and the bottom plate 315, the outer plate 311, the inner plate 313, the top plate 314, and the bottom plate 315 defining a channel 316 therebetween.

In some embodiments of the present invention, as shown in fig. 4, the capacitor assembly 3 includes a capacitor supporting assembly 31 and a plurality of capacitors 32, and the capacitors 32 are disposed on the capacitor supporting assembly 31. Further, as shown in fig. 3, the connection contacts 321 of the capacitor 32 are substantially flush with the mounting surface of the component 22 in the first direction. Specifically, in the example shown in fig. 3, the connection contact 321 of the capacitor 32 is flush with the mounting surface of the component 22 on the heat sink main body 21, so that the connection between the component 22 and the capacitor 32 is facilitated, the length of the current loop is greatly shortened, the stray inductance of the current loop is reduced, and the performance of the frequency converter power unit 100 is improved.

Wherein the connection contacts 321 comprise the positive and negative contacts of the capacitor 32.

Further, as shown in fig. 3 and 6, the connection contact 321 of the capacitor 32 is located at an end of the capacitor 32 away from the capacitor support assembly 31. This protects the connection contact 321 of the capacitor 32 and facilitates the connection of the connection contact 321 of the capacitor 32 to the component 22. In addition, since the connection contact 321 of the capacitor 32 is located at one end of the capacitor 32 far from the capacitor support assembly 31, and when the connection contact 321 of the capacitor 32 is ensured to be substantially flush with the mounting surface of the component 22, the capacitor 32 can be spaced from the surface of the casing 1 close to the heat sink main body 21, that is, the surface of the first wall surface 11 close to the heat sink main body 21, so as to form the air duct 17, and make the structure of the frequency converter power unit 100 more compact.

In some embodiments of the present invention, as shown in fig. 6-8, the component 22 includes an IGBT (insulated Gate Bipolar transistor)221 and a rectifier bridge 222, the IGBT221 and the rectifier bridge 222 are sequentially arranged in a third direction, and the third direction is perpendicular to both the first direction and the second direction. The arrangement of the IGBT221 and the rectifier bridge 222 serving as the main heat source can make the IGBT221 and the rectifier bridge 222 form a parallel heat dissipation loop, thereby greatly improving the heat dissipation performance of the heat sink assembly 2 and improving the current utilization rate of the IGBT221 and the rectifier bridge 222.

The parallel heat dissipation loops are formed by arranging the IGBT221 and the rectifier bridge 222 in the third direction of the air duct 17, and after entering the air duct 17, the airflow flows through the IGBT221 and the rectifier bridge 222 at the same time, but does not flow through the IGBT221 and the rectifier bridge 222 in sequence, so that the heat dissipation performance of the heat sink assembly 2 is greatly improved, and the current utilization rate of the IGBT221 and the rectifier bridge 222 is improved.

Further, as shown in fig. 6 to 8, there are at least two IGBTs 221, and the at least two IGBTs 221 are arranged in the third direction. Therefore, the at least two IGBTs 221 and the rectifier bridge 222 can be arranged in the third direction, the heat dissipation performance of the heat sink assembly 2 can be further greatly improved, the current utilization rate of the IGBTs 221 and the rectifier bridge 222 can be improved, the weight of the heat sink assembly 2 can be reduced, and the cost can be reduced.

In addition, as shown in fig. 6 to 8, there are at least two rectifier bridges 222, and since the heat generation amount of the rectifier bridge 222 is smaller than that of the IGBT221, the at least two rectifier bridges 222 may be arranged in the second direction. The arrangement not only can ensure the heat dissipation of the rectifier bridge 222, but also can enable the structure of the radiator component 2 to be more compact, and is beneficial to reducing the volume of the radiator component 2.

In some embodiments of the present invention, as shown in fig. 6, 11 and 12, the IGBT221 and the rectifier bridge 222 are connected with the capacitor 32 in a tiled manner through the laminated busbar 4 to form a loop. The laminated busbar 4 has the advantages of low cost, high reliability and safety, compact structure, low impedance, less stray inductance, good heat dissipation, convenience in installation and the like, so that the cost of the frequency converter power unit 100 can be reduced, the reliability of the frequency converter power unit 100 can be improved, the size of the frequency converter power unit 100 can be reduced, and the stray inductance can be reduced.

Specifically, as shown in fig. 11 and 12, the laminated busbar 4 includes a positive electrode row 41 and a negative electrode row 42 which are laminated, and the positive electrode row 41 and the negative electrode row 42 are insulated from each other by, for example, an insulating layer.

Specifically, as shown in fig. 6, 11 and 12, the laminated busbar 4 includes a positive electrode row 41 and a negative electrode row 42, the positive electrode row 41 includes a positive electrode row main body portion 411 and a positive electrode row connecting portion 412 that are connected, the negative electrode row 42 includes a negative electrode row main body portion 421 and a negative electrode row connecting portion 422 that are connected, the positive electrode row main body portion 411 and the negative electrode row main body portion 421 are laminated, an insulating layer is disposed between the positive electrode row main body portion 411 and the negative electrode row main body portion 421, the positive electrode row connecting portion 412 and the negative electrode row connecting portion 422 are laminated, an insulating layer is disposed between the positive electrode row connecting portion 412 and the negative electrode row connecting portion 422, the positive electrode row main body portion 411 and the negative electrode row main body portion 421 are respectively connected to the capacitor 32, and the positive electrode row connecting portion 412 and the negative electrode row connecting portion 422 are respectively connected to the IGBT 221. In addition, the positive electrode row connection part 412 and the negative electrode row connection part 422 connected to the IGBT221 are also stacked, so that stray inductance can be greatly reduced.

In addition, the positive electrode row main body portion 411 and the negative electrode row main body portion 421 are respectively connected to the rectifier bridge 222 through the electrical connection members 43, thereby facilitating connection between the positive electrode row main body portion 411 and the negative electrode row main body portion 421 and the rectifier bridge 222.

Referring to fig. 4, 5, 13 and 14, the inverter power unit 100 further includes a control board assembly 5, the control board assembly 5 including a control board bracket 51, and an integrated board 52 and a bypass board 53 provided on the control board bracket 51, the control board bracket 51 being mounted in the case 1. Wherein, control panel assembly 5 locates the one side of components and parts 22 far away from wind channel 17, and is located the one side of components and parts 22 of orientation of electric capacity subassembly 3, and components and parts 22 are connected with control panel assembly 5. Capacitor assembly 3 and radiator module 2 arrange for one side of components and parts 22 and capacitor assembly 3's the one side towards components and parts 22 that keeps away from wind channel 17 in casing 1 has great accommodation space, the setting of the control panel subassembly 5 of being convenient for, in addition, control panel subassembly 5 sets up in this position, be convenient for and components and parts 22 between be connected.

In some embodiments of the present invention, as shown in fig. 15, a mounting bracket 19 for mounting the capacitor module 3 and the heat sink module 2 is disposed in the housing 1, thereby facilitating the fixing of the capacitor module 3 and the heat sink module 2. Thereby facilitating the fixation of the control plate assembly 5.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A frequency converter power cell, comprising:

the air duct is arranged in the shell and positioned at one end of the shell in a first direction, the air duct extends along a second direction, the air duct is provided with a first air inlet and a first air outlet which are respectively positioned at two ends of the shell in the second direction, and the first direction and the second direction are vertical in the horizontal direction;

the radiator assembly is arranged in the shell and comprises a radiator main body and components which are arranged in the first direction, the components are arranged on the radiator main body, at least part of the radiator main body is positioned in the air duct, and the components are arranged outside the air duct;

the capacitor assembly is arranged in the shell and located outside the air duct, and the capacitor assembly and the components are arranged in the second direction and located on the same side of the air duct.

2. The inverter power unit of claim 1, wherein a baffle is disposed within the housing, the heat sink body comprising:

the heat dissipation plate and the partition plate are arranged in a second direction and are connected with each other, the heat dissipation plate, the partition plate and the shell define the air channel, the component is mounted on one side of the heat dissipation plate, which is far away from the air channel, and the capacitor assembly is located on one side of the partition plate, which is far away from the air channel;

the radiating fins are arranged on one side, far away from the components, of the radiating plate and are arranged in the air duct.

3. The inverter power unit of claim 1, wherein the heat sink assembly is disposed on a side of the capacitor assembly proximate the first air inlet.

4. The inverter power unit of claim 1, wherein the air duct extends from one end to the other end of the housing in a third direction, the third direction being perpendicular to both the first direction and the second direction.

5. The inverter power unit according to claim 1, wherein the casing includes a first wall surface and a second wall surface that are opposite to each other in a first direction, and a third wall surface and a fourth wall surface that are opposite to each other in a second direction, the first wall surface is configured as a part of the wall surface of the air duct, one of the third wall surface and the fourth wall surface is provided with the first air inlet, the other of the third wall surface and the fourth wall surface is provided with the first air outlet, the radiator assembly is provided on a side of the capacitor assembly that is close to the third wall surface, an end of the second wall surface that is close to the fourth wall surface is spaced apart from the fourth wall surface to form an avoidance gap, the capacitor assembly includes a capacitor support assembly that supports a capacitor, the capacitor support assembly includes an outer plate that is opposite to the avoidance gap, and the capacitor is provided on a side of the outer plate that faces the first wall surface, the outer plate is provided with a plurality of spaced second air inlets, and the fourth wall surface is provided with a plurality of spaced second air outlets.

6. The frequency converter power unit of claim 5, wherein the capacitive support assembly further comprises an inner plate disposed parallel to the outer plate and located on a side of the outer plate facing the first wall surface, the inner plate and the outer plate defining a channel, the second air inlet and the second air outlet being in communication with the channel, respectively.

7. The converter power unit of claim 1, wherein the capacitive assembly comprises:

a capacitive support assembly;

the capacitor is arranged on the capacitor supporting assembly, a connecting contact of the capacitor is approximately flush with the mounting surface of the component in the first direction, and the connecting contact of the capacitor is positioned at one end of the capacitor far away from the capacitor supporting assembly.

8. The frequency converter power unit according to claim 1, wherein the components comprise IGBTs and rectifier bridges, the IGBTs and the rectifier bridges are sequentially arranged in a third direction, the third direction is perpendicular to both the first direction and the second direction, the number of the IGBTs is at least two, the IGBTs are arranged in the third direction, the number of the rectifier bridges is at least two, and the rectifier bridges are arranged in the second direction.

9. The converter power unit of claim 8, wherein the IGBT and the rectifier bridge are connected to the capacitor through a laminated busbar, respectively, the laminated busbar comprising:

the positive electrode row comprises a positive electrode row main body part and a positive electrode row connecting part which are connected;

the negative pole row, the negative pole row is including negative pole row main part and the negative pole row connecting portion of connecting, positive pole row main part with the negative pole row main part is range upon range of the setting just positive pole row main part with be equipped with the insulating layer between the negative pole row main part, positive pole row connecting portion with the range upon range of setting of negative pole row connecting portion, just positive pole row connecting portion with be equipped with the insulating layer between the negative pole row connecting portion, positive pole row main part with negative pole row main part respectively with the electric capacity is connected, positive pole row connecting portion with negative pole row connecting portion respectively with the IGBT is connected.

10. The frequency converter power unit of claim 1, further comprising:

the control panel assembly is arranged on one side, away from the air duct, of the component and is located on one side, facing the capacitor assembly, of the component, and the component is connected with the control panel assembly.