CN212969413U

CN212969413U - Power unit

Info

Publication number: CN212969413U
Application number: CN202021397559.XU
Authority: CN
Inventors: 王顺旗; 白琛; 沈旭
Original assignee: Vertiv Tech Co Ltd
Current assignee: Vertiv Tech Co Ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-04-13
Anticipated expiration: 2030-07-15

Abstract

The utility model discloses a power unit, the load simulator comprises a case, the spatial arrangement of machine incasement has: the bus capacitor is fixedly arranged in a first space of the case in the Z direction; the radiator is fixedly arranged in the Z-direction second space of the case; the IGBT is fixedly arranged at the first end of the radiator in the Y direction and is electrically connected with the bus capacitor; the rectifier bridge is fixedly arranged at the second end of the radiator in the Y direction and is electrically connected with the bus capacitor; the input copper bar extends along the Z direction and is arranged with the IGBT in parallel along the X direction; and the fuse is installed on the input copper bar. The technical scheme of the utility model structural layout is compact, and the body machine reduces half than the scheme among the same power prior art.

Description

Power unit

Technical Field

The utility model belongs to the technical field of electrical equipment, in particular to power unit.

Background

With the increasing prominence of the problem of energy shortage, energy conservation and consumption reduction become the focus of people to pay attention. The medium-voltage frequency converter is developed in a rapid manner just by following the trend, the application of the medium-voltage frequency converter is more and more extensive, and particularly the market demand of the high-power frequency converter is more and more.

For a high-power frequency converter, the volume of a power unit of a core component of the high-power frequency converter is larger and larger due to the increase of power devices, and particularly for a cascade frequency converter, the volume of the power unit directly determines the volume of the whole frequency converter. How to make the power unit have good performance, small size and high space utilization becomes a key issue that designers have to consider.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a power unit with structural configuration is compact, small in size.

In order to solve the technical problem, the utility model provides a technical scheme does:

a power unit comprising a chassis, a space within the chassis having disposed therein:

the bus capacitor is fixedly arranged in a first space of the case in the Z direction;

the radiator is fixedly arranged in the Z-direction second space of the case;

the IGBT is fixedly arranged at the first end of the radiator in the Y direction and is electrically connected with the bus capacitor;

the rectifier bridge is fixedly arranged at the second end of the radiator in the Y direction and is electrically connected with the bus capacitor;

the input copper bar extends along the Z direction and is arranged with the IGBT in parallel along the X direction;

and the fuse is installed on the input copper bar.

Furthermore, one end of the input copper bar is electrically connected with the input end of the rectifier bridge, and the other end of the input copper bar extends out of the case.

Further, the input copper bar comprises an A-phase sub input copper bar, a B-phase sub input copper bar and a C-phase sub input copper bar, and the A-phase sub input copper bar, the B-phase sub input copper bar and the C-phase sub input copper bar are arranged side by side along the Z direction.

Furthermore, the number of the fuses is two, and the fuses are respectively installed on the A-phase sub-input copper bar and the C-phase sub-input copper bar.

Further, a partition plate for separating the fuse and the IGBT is arranged between the fuse and the IGBT.

Furthermore, the number of the IGBTs is multiple, and the IGBTs are arranged in parallel along the Y direction; the rectifier bridge is in a plurality of numbers, and the plurality of rectifier bridges are arranged in parallel along the Z direction.

Furthermore, the IGBT device further comprises an absorption capacitor, and the absorption capacitor is connected with the direct current end of the IGBT.

Furthermore, the power supply further comprises an output copper bar, wherein the output copper bar extends along the Y direction and is arranged side by side with the IGBT along the Z direction, and one end of the output copper bar is arranged outside the first panel of the case in a protruding mode.

Furthermore, still including setting up bypass contactor and the bypass output copper bar in the outside of the second panel of quick-witted case, the bypass output copper bar extends along the Z direction, one end with bypass contactor connects, and the other end is connected with the output copper bar, the second panel with first panel sets up relatively.

Furthermore, the output copper bar comprises a first output sub copper bar and a second output sub copper bar, one end of the first output sub copper bar is arranged outside the first panel in a protruding mode, and the other end of the first output sub copper bar is connected with the bypass output copper bar; one end of the second output sub copper bar is connected with the IGBT, and the other end of the second output sub copper bar is connected with the bypass output copper bar and then returns to the first panel.

Further, the bus bar capacitor further comprises a main control board, wherein the main control board is arranged in the first space and is stacked with the bus bar capacitor along the X direction.

Furthermore, the device also comprises a bypass control plate, and the bypass control plate and the main control plate are arranged in parallel along the Z direction.

The utility model has the advantages that:

the technical scheme of the utility model structural layout is compact, and the body machine reduces half than the scheme among the same power prior art.

Drawings

Fig. 1 is a schematic view of a partial internal layout three-dimensional structure of a power unit in embodiment 1 of the present invention;

fig. 2 is a schematic view of another partial internal layout three-dimensional structure of the power unit according to embodiment 1 of the present invention;

fig. 3 is a schematic view of an angular external layout three-dimensional structure of a power unit according to embodiment 1 of the present invention;

fig. 4 is a schematic external layout perspective view of another angle of the power unit in embodiment 1 of the present invention;

fig. 5 is a schematic view of a further internal layout three-dimensional structure of the power unit according to embodiment 1 of the present invention;

fig. 6 is a schematic view of an internal layout three-dimensional structure of a power unit according to embodiment 2 of the present invention;

fig. 7 is a schematic view of an angular external layout three-dimensional structure of a power unit according to embodiment 2 of the present invention;

fig. 8 is a schematic view of another internal layout three-dimensional structure of a power unit according to embodiment 2 of the present invention.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, 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 specifically defined otherwise.

Example 1

Referring to fig. 1 and fig. 2, for a preferred embodiment of the present invention, the power unit includes a case 100, and the space inside the case 100 is arranged with: a bus capacitor 200 fixedly mounted in the Z-direction first space 170 of the housing 100; a heat sink 300 fixedly mounted in the Z-direction second space 180 of the housing 100; an IGBT400 fixedly attached to a first end 310 of the heat sink 300 in the Y direction, and electrically connected to the bus capacitor 200; a rectifier bridge 500 fixedly installed at the second end 320 of the heat sink 300 in the Y direction, and electrically connected to the bus capacitor 200; an input copper bar 910 extending along the Z direction and arranged side by side with the IGBT400 along the X direction; and the fuse 930 is installed on the input copper bar 910. The technical scheme of the utility model structural layout is compact, and the body machine reduces half than the scheme among the same power prior art. The above components are described in further detail below.

As shown in fig. 3 and 4, the enclosure 100 includes a first panel 110 (front), a second panel 120 (back), a third panel 130 (top), a fourth panel (not numbered in the figure) (bottom), a fifth panel 150 (left), and a sixth panel 160 (right), for example, the first panel 110 (front), the second panel 120 (back), the third panel 130 (top), the fourth panel (not numbered in the figure) (bottom), the fifth panel 150 (left), and the sixth panel 160 (right) are spliced together to form the enclosure 100 with an internal cavity structure.

Specifically, the first panel 110 and the second panel 120 are parallel to and opposite to each other, and are a front panel and a back panel, respectively. The first panel 110 is provided with an input copper bar 910, an output copper bar 920, a first heat dissipation hole 111, a third heat dissipation hole 112, a front baffle 113, and the like. Specifically, the input copper bar 910 and the output copper bar 920 are installed at the end of the first panel 110 near the third panel 130. The input copper bar 910 enters the inside of the case 100 through the opening on the first panel 110, and the opening is shielded by the front baffle 113, so that the heat dissipation efficiency is improved while the dust is prevented. The first heat dissipation hole 111 is opened at an end of the first panel 110 close to the third panel 130, and the third heat dissipation hole 112 is opened at an end of the first panel 110 close to the fourth panel (not numbered).

The second panel 120 is provided with a voltage equalizing resistor 940, a second heat dissipation hole 121, a fourth heat dissipation hole 122, and the like. Specifically, the second heat dissipation hole 121 is opened at an end of the second panel 120 close to the third panel 130, and the fourth heat dissipation hole 122 is opened at an end of the second panel 120 close to the fourth panel (not numbered).

The third panel 130 (top) and the fourth panel (not numbered) (bottom) are parallel and opposite to each other, and are a top panel and a bottom panel, respectively. The fifth panel 150 (left) and the sixth panel 160 (right) are parallel to and opposite to each other, and are a left panel and a right panel, respectively.

For convenience of description, a direction from the first panel 110 to the second panel 120 is a Y direction, a direction from the third panel 130 (top) to the fourth panel (not numbered in the drawing) (bottom) is a Z direction, and a direction from the fifth panel 150 (left) to the sixth panel 160 (right) is an X direction.

The internal cavity of the chassis 100 is divided into a second space 180 and a first space 170 stacked up and down in the Z direction, for example, the second space 180 is disposed adjacent to the third panel 130, and the first space 170 is disposed adjacent to the fourth panel (not numbered).

The chassis 100 is internally provided with a bus capacitor 200, a radiator 300, an IGBT400, a rectifier bridge 500, an absorption capacitor 600, a bus copper bar 700, a main control board 800, an input copper bar 910, an output copper bar 920, a fuse 930 and the like. The bus capacitor 200, the bus copper bar 700, the main control board 800 and other structures are arranged in the first space 170; the heat sink 300, the IGBT400, the rectifier bridge 500, the absorption capacitor 600, the input copper bar 910, the output copper bar 920, and the fuse 930 are mounted in the second space 180.

As shown in fig. 1, the heat sink 300 has a first end 310 near the first panel 110 and a second end 320 near the second panel 120 in the Y direction. As shown in fig. 3 and 4, the first panel 110 has a first heat dissipation hole 111, and the second panel 120 has a second heat dissipation hole 121. The second space 180 between the first heat dissipation hole 111 and the second heat dissipation hole 121 forms a heat dissipation air duct, and the heat sink 300 is particularly installed in the heat dissipation air duct.

As shown in fig. 1, the IGBT400, the rectifier bridge 500, and other structures are fixedly mounted on the heat sink 300, and thus the heat sink has good heat dissipation performance and high heat dissipation efficiency.

Specifically, the IGBT400 is fixedly mounted on the Y-direction first end 310 of the heat sink 300, and is electrically connected to the bus capacitor 200 through the bus bar copper bar 700. The number of the IGBTs 400 may be plural, for example, two IGBTs 400, and the two IGBTs 400 are arranged in parallel in the Y direction. The dc terminal of the IGBT400 is connected to the absorption capacitor 600.

The rectifier bridge 500 is fixedly installed at the second end 320 of the heat sink 300 in the Y direction, and is electrically connected to the bus capacitor 200 through the bus copper bar 700. The number of the rectifier bridges 500 may be plural, for example, three rectifier bridges 500, and the three rectifier bridges 500 are arranged in parallel along the Z direction.

As shown in fig. 2, a part of each of the input copper bar 910 and the output copper bar 920 is disposed inside the chassis 100, and another part is disposed outside the chassis 100.

The input copper bar 910 extends in the second space 180 along the Y direction, one end of the input copper bar is electrically connected to the input end of the rectifier bridge 500, and the other end of the input copper bar extends out of the case 100. The input copper bar 910 comprises an A-phase sub-input copper bar 911, a B-phase sub-input copper bar 912 and a C-phase sub-input copper bar 913, and the A-phase sub-input copper bar 911, the B-phase sub-input copper bar 912 and the C-phase sub-input copper bar (913) are arranged side by side along the Z direction.

The a-phase sub-input copper bar 911 and the C-phase sub-input copper bar 913 are respectively provided with a fuse 930. A partition 931 is provided between the fuse 930 and the IGBT400 to separate the fuse from the IGBT400, and the partition 931 can prevent one from affecting the other when the other fails. The absorption capacitor 600 is bound on the partition 931 and connected to the dc terminal of the IGBT 400.

Output copper bar 920 extends along the Y direction and is arranged side by side with input copper bar 910 and IGBT400 along the Z direction in second space 180. One end of the output copper bar 920 protrudes out of the first panel 110 of the casing 100, and the other end is disposed in the second space 180 of the casing 100.

As shown in fig. 5, a main control board 800 is disposed in the first space 170, and is stacked with the bus bar capacitor 200 in the X direction. Specifically, the main control board 800 is installed at a side near the fifth panel 150, and the bus capacitor 200 is installed at a side near the sixth panel 160. It is understood that the main control board 800 and the bus capacitors 200 may be exchanged, for example, the main control board 800 is installed on the side near the sixth board 160, and the bus capacitors 200 are installed on the side near the fifth board 150.

Example 2

The present embodiment is substantially the same as embodiment 1, except that, as shown in fig. 6, the power unit in the present embodiment further includes a bypass contactor 1110 and a bypass output copper bar 1120. Specifically, the bypass contactor 1110 and the bypass output copper bar 1120 are disposed outside the second panel 120 of the chassis 100. The bypass contactor 1110 is installed in the Z direction with terminals facing the third panel 130 and connected to the main power loop through the bypass output copper bar 1120.

As shown in fig. 7, the bypass output copper bar 1120 extends along the Z direction, one end of the bypass output copper bar is connected to the bypass contactor 1110, and the other end of the bypass output copper bar enters the inside of the case 100 through the opening of the second panel 120 and is connected to the output copper bar 920. The opening is shielded by a rear baffle 123, so that the heat dissipation efficiency is improved while the dust is prevented.

As shown in fig. 6, the output copper bar 920 includes a first output sub copper bar 921 and a second output sub copper bar 922. One end of the first output sub copper bar 921 is protruded outside the first panel 110, and the other end is connected to the bypass output copper bar 1120. One end of the second output sub copper bar 922 is connected to the IGBT400, and the other end is connected to the bypass output copper bar 1120 first, and then returns to the first panel 110.

As shown in fig. 8, the power unit of the present embodiment further includes a bypass control board 1130. The bypass control plate 1130 is juxtaposed with the main control plate 800 in the Z direction, for example, the bypass control plate 1130 is disposed adjacent to a fourth panel (not numbered) and the main control plate 800 is disposed adjacent to the third panel 130. Of course, it is understood that the position of the rectifying plate 810 and the main control plate 800 can be changed.

The above description is only a preferred embodiment of the present invention, and many changes can be made in the detailed description and the application scope according to the idea of the present invention for those skilled in the art, which all belong to the protection scope of the present invention as long as the changes do not depart from the concept of the present invention.

Claims

1. A power unit comprising a cabinet (100), characterized in that a space inside the cabinet (100) is arranged with:

a bus capacitor (200) fixedly mounted in a first Z-direction space (170) of the housing (100);

a heat sink (300) fixedly mounted in a second space (180) in the Z direction of the housing (100);

an IGBT (400) fixedly mounted on a first end (310) of the heat sink (300) in the Y direction and electrically connected with the bus capacitor (200);

a rectifier bridge (500) fixedly mounted on a second end (320) of the heat sink (300) in the Y direction and electrically connected with the bus capacitor (200);

the input copper bar (910) extends along the Z direction and is arranged with the IGBT (400) along the X direction in parallel;

a fuse (930) mounted on the input copper bar (910).

2. The power unit according to claim 1, wherein one end of the input copper bar (910) is electrically connected to the input end of the rectifier bridge (500), and the other end extends out of the case (100).

3. The power unit according to any one of claims 1 or 2, wherein the input copper bar (910) comprises an a-phase sub-input copper bar (911), a B-phase sub-input copper bar (912), and a C-phase sub-input copper bar (913), and the a-phase sub-input copper bar (911), the B-phase sub-input copper bar (912), and the C-phase sub-input copper bar (913) are arranged side by side along the Z direction.

4. The power unit according to claim 3, wherein the number of the fuses (930) is two, and the fuses are respectively mounted on the A-phase sub-input copper bar (911) and the C-phase sub-input copper bar (913).

5. A power unit as claimed in claim 4, characterized in that a partition (931) is provided between the fuse (930) and the IGBT (400) for separating them.

6. The power unit according to claim 1, wherein the number of the IGBTs (400) is plural, and the plural IGBTs (400) are juxtaposed in a Y direction; the number of the rectifier bridges (500) is multiple, and the plurality of rectifier bridges (500) are arranged in parallel along the Z direction.

7. The power unit according to claim 1, further comprising a snubber capacitor (600), the snubber capacitor (600) being connected to the DC terminal of the IGBT (400).

8. The power unit according to claim 1, further comprising an output copper bar (920), wherein the output copper bar (920) extends along the Y direction, is arranged side by side with the IGBT (400) along the Z direction, and has one end protruding out of the first panel (110) of the case (100).

9. The power unit of claim 8, further comprising a bypass contactor (1110) and a bypass output copper bar (1120) disposed outside a second panel (120) of the chassis (100), wherein the bypass output copper bar (1120) extends in the Z direction, one end of the bypass contactor is connected to the bypass contactor (1110), the other end of the bypass contactor is connected to the output copper bar (920), and the second panel (120) is disposed opposite to the first panel (110).

10. The power unit according to claim 9, wherein the output copper bar (920) comprises a first output sub copper bar (921) and a second output sub copper bar (922), one end of the first output sub copper bar (921) is arranged outside the first panel (110) in a protruding way, and the other end is connected with the bypass output copper bar (1120); one end of the second output sub copper bar (922) is connected with the IGBT (400), and the other end of the second output sub copper bar is connected with the bypass output copper bar (1120) and then returns to the first panel (110).

11. The power unit according to any one of claims 8-10, further comprising a main control board (800), the main control board (800) being disposed in the first space (170) and stacked with the bus bar capacitor (200) in the X-direction.

12. The power unit as claimed in claim 11, further comprising a bypass control board (1130), wherein the bypass control board (1130) is juxtaposed with the main control board (800) in the Z direction.