CN219107282U - Power unit, power unit cascade structure and power electronic equipment - Google Patents

Abstract

The utility model discloses a power unit, a power unit cascade structure and power electronic equipment, wherein the power unit comprises: the shell is respectively arranged in the power module assembly, the capacitor cell assembly and the board card assembly in the shell; the power module assembly and the capacitor pool assembly are sequentially distributed along the height direction of the shell; the board card assembly is positioned on the same side of the power module assembly and the capacitor cell assembly in the width direction of the shell. In the power unit, the power module assemblies and the capacitor pool assemblies are sequentially distributed along the height direction of the shell, so that the occupation of the power module assemblies and the capacitor pool assemblies to the space in the width direction of the shell is reduced; in the width direction of the shell, the board card assembly is positioned on the same side of the power module assembly and the capacitor cell assembly, so that the occupation of the board card assembly to the space in the width direction of the shell is reduced. Therefore, the structure reduces the width of the whole power unit, reduces the occupied area of the power units after cascading, and reduces the space requirement of the power unit cascading to the installation site.

Description

Power unit, power unit cascade structure and power electronic equipment

Technical Field

The present utility model relates to the technical field of power electronics, and more particularly, to a power unit, a power unit cascade structure, and a power electronics.

Background

The power unit is one of core units of the power electronic equipment, and integrates various electric components into a frame shell, and then the functions of the power unit are realized in a cascading mode.

At present, the power units are in a cuboid shape, are installed side by side in the width direction of the power units and are cascaded. Because the design width of the same power unit is larger, the power unit after cascading occupies larger area, and the space requirement on the installation site is higher.

In addition, the power unit has more electric components, more complicated assembly and lower assembly efficiency.

In summary, how to design the power unit to reduce the width of the power unit, so as to reduce the occupation area of the power unit after cascading is a problem to be solved by those skilled in the art.

Disclosure of Invention

In view of the above, the present utility model is to provide a power unit to reduce the width of the power unit, thereby reducing the occupation area of the cascaded power units and reducing the space requirement of the power unit cascade on the installation site.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a power cell, comprising: the shell is arranged in the power module assembly, the capacitor cell assembly and the board card assembly in the shell;

the power module assembly and the capacitor pool assembly are sequentially distributed along the height direction of the shell; and the board card assembly is positioned on the same side of the power module assembly and the capacitor cell assembly in the width direction of the shell.

Optionally, the capacitor cell assembly includes a capacitor support and a capacitor; wherein, the electric capacity set up in the electric capacity supporter along the width direction of casing.

Optionally, the capacitor support is perpendicular to the width direction of the housing;

and/or a capacitor mounting hole is reserved in the capacitor support body, and the capacitor support body is electrically connected with all the capacitors.

Optionally, in the height direction of the housing, the capacitor cell assembly and the power module assembly are sequentially distributed from bottom to top, and the board card assembly is close to the top of the capacitor cell assembly and the power module assembly.

Optionally, the power module assembly is an independent assembly, and the power module assembly is integrally mounted to the housing;

and/or the capacitor cell assembly is an independent assembly, and the capacitor cell assembly is integrally mounted on the shell;

and/or the board card assembly is an independent assembly, and the board card assembly is integrally mounted on the shell.

Optionally, the power module assembly includes a rectifying module and an inverting module, and the rectifying module and the inverting module are distributed in sequence along the length direction of the housing.

Optionally, at least two rectifying modules are provided, and any two rectifying modules are sequentially distributed along the height direction of the shell;

and/or at least two inverter modules are arranged, and any two inverter modules are sequentially distributed along the length direction of the shell.

Optionally, the output end of the rectifying module is connected to the input end of the capacitor pool assembly through a conductive piece in a switching mode, and the input end of the inversion module is directly connected with the output end of the capacitor pool assembly.

Optionally, the power module assembly further includes a heat dissipating device, and the rectifying module and the inverting module are both disposed on the heat dissipating device.

Optionally, the board card assembly is located at a side of the rectifying module and the inverting module away from the heat dissipating device.

Optionally, the housing comprises: the main body frame is respectively arranged on the first cover plate and the second cover plate at two sides of the main body frame; the first cover plate and the second cover plate are distributed in sequence in the width direction of the shell.

Based on the power units provided by the utility model, the utility model also provides a power unit cascade structure, which comprises any one of the power units, wherein at least two power units are arranged, and any two power units are sequentially distributed along the width direction of the power units.

Based on the power unit cascade structure, the utility model further provides power electronic equipment, and the power electronic equipment comprises the power unit cascade structure.

In the power unit provided by the utility model, the power module components and the capacitor pool components are sequentially distributed along the height direction of the shell, so that the occupation of the power module components and the capacitor pool components to the space in the width direction of the shell is effectively reduced; in the width direction of the shell, the board card assembly is positioned on the same side of the power module assembly and the capacitor cell assembly, so that the occupation of the board card assembly to the space in the width direction of the shell is effectively reduced. Therefore, the width of the whole power unit is effectively reduced by the structure, the occupied area of the power units after cascading is reduced, and the space requirement of the power unit cascading to the installation site is reduced.

Because the power unit provided by the utility model has the technical effects, the power unit cascade structure provided by the utility model comprises the power unit, and the power electronic equipment provided by the utility model comprises the power unit cascade structure, the power unit cascade structure and the power electronic equipment provided by the utility model also have corresponding technical effects, and the description is omitted herein.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a power unit according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a power cell according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of a part of a power unit according to an embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of FIG. 3 in another direction;

fig. 5 is an installation schematic diagram of a board card assembly in a power unit according to an embodiment of the utility model.

In fig. 1-5:

1 is a shell, 2 is a power module assembly, 3 is a capacitance pool assembly, and 4 is a board card assembly;

11 is a main body frame, 12 is a first cover plate, 13 is a second cover plate, and 14 is a top plate;

21 is a rectifying module, 21a is a first rectifying module, 21b is a second rectifying module, 21c is a third rectifying module, 22 is an inversion module, 22a is a first inversion module, 22b is a second inversion module, 23 is a heat dissipating device, and 24 is a conductive member;

31 is a capacitor support, 32 is a capacitor;

41 is a control board, 42 is a driving board, 43 is a power board, 44 is a lamp board, and 45 is a circuit board support body; 5a is a first input copper bar, 5b is a second input copper bar, and 5c is a third input copper bar.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary. It should also be understood that in embodiments of the present application, "one or more" means one, two, or more than two; "and/or", describes an association relationship of the association object, indicating that three relationships may exist; for example, a and/or B may represent: a alone, a and B together, and B alone, wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

In the description of the embodiments of the present application, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or order.

As shown in fig. 1 and fig. 2, a power unit provided in an embodiment of the present utility model includes: the power module assembly 2, the capacitor cell assembly 3 and the board card assembly 4 are arranged in the shell 1.

As shown in fig. 1, the housing 1 has a rectangular parallelepiped shape, and the housing 1 has a width direction, a length direction, and a height direction, which are perpendicular to each other. In the normal placement state and the normal installation state of the power unit, the height direction of the housing 1 is the vertical direction, the width direction and the length direction of the housing 1 are parallel to the horizontal direction, and the horizontal direction is perpendicular to the vertical direction.

It should be noted that "parallel" and "perpendicular" referred to in this application are "substantially parallel" and "substantially perpendicular" in actual operation. "substantially parallel" may be understood as parallel with some error and similarly "substantially perpendicular" may be understood as perpendicular with some error.

As shown in fig. 1 and 2, in the power unit, the power module assembly 2 and the capacitor cell assembly 3 are sequentially distributed along the height direction of the housing 1; the board card assembly 4 is located on the same side of the power module assembly 2 and the capacitor cell assembly 3 in the width direction of the housing 1.

Referring to the view angle shown in fig. 2, in the width direction of the housing 1, the board assembly 4 is located on the left side of the power module assembly 2 and the capacitor cell assembly 3, that is, the power module assembly 2 and the capacitor cell assembly 3 are located on the right side of the board assembly 4. In the height direction of the housing 1, the capacitor cell assembly 3 and the power module assembly 2 are distributed sequentially from bottom to top, and the board card assembly 4 is close to the top of the capacitor cell assembly 3 and the power module assembly 2.

Of course, alternatively, the board card assembly 4 is located on the right side of the power module assembly 2 and the capacitor cell assembly 3 in the width direction of the housing 1; in the height direction of the shell 1, the capacitor cell assembly 3 and the power module assembly 2 are distributed sequentially from top to bottom, and the board card assembly 4 is close to the bottom of the capacitor cell assembly 3 and the power module assembly 2.

In the power unit, the power module assembly 2 and the capacitor pool assembly 3 are sequentially distributed along the height direction of the shell 1, so that the occupation of the power module assembly 2 and the capacitor pool assembly 3 to the space in the width direction of the shell 1 is effectively reduced; in the width direction of the shell 1, the board card assembly 4 is positioned on the same side of the power module assembly 2 and the capacitor cell assembly 3, so that the occupation of the board card assembly 4 to the space in the width direction of the shell 1 is effectively reduced. Therefore, the width of the whole power unit is effectively reduced by the structure, the occupied area of the power units after cascading is reduced, and the space requirement of the power unit cascading to the installation site is reduced; and the transportation of the power unit is facilitated, and the transportation cost of the power unit is reduced.

The capacitor cell assembly 3 includes a capacitor 32, and the capacitor 32 may be one or more than two. In some embodiments, to further reduce the width of the power cells, each capacitor 32 in the capacitor cell assembly 3 is disposed along the width of the housing 1. In order to simplify the installation of the capacitor 32, the capacitor cell assembly 3 further includes a capacitor support 31, and the capacitor 32 is disposed on the capacitor support 31 along the width direction of the housing 1.

In order to facilitate mounting of the capacitor 32, the capacitor support 31 is perpendicular to the width direction of the case 1. Of course, the angle between the capacitor support 31 and the width direction of the case 1 may be selected to be an acute angle, and is not limited to the above-described embodiment.

The capacitor cell assembly 3 can achieve the purpose of capacity expansion by increasing the number of capacitors 32. In order to facilitate the adjustment of the number of capacitors 32, the capacitor support 31 is provided with a capacitor mounting hole, and the capacitor support 31 is electrically connected to all the capacitors 32. It is understood that the number of the capacitor mounting positions is not less than the number of the capacitors 32, the capacitors 32 are disposed in the capacitor mounting holes, one capacitor 32 can be disposed in each capacitor mounting hole, and any two capacitors 32 disposed in the capacitor mounting holes are electrically connected to the capacitor support 31. In this way, within the number of capacitor mounting holes, it is possible to achieve an adjustment of the number of capacitors 32 without increasing the power cell volume. For example, the number of capacitor mounting holes is twenty-one, the number of capacitors 32 may be sixteen, twenty-one, or the like.

In order to facilitate the electrical connection of all the capacitors 32 by the capacitor support 31, the capacitor support 31 is a laminated bus bar. Of course, the capacitor support 31 may be selected from other types, which is not limited in this embodiment.

In the existing power unit, each electric component is independently installed, so that assembly efficiency is low. In some embodiments, to improve assembly efficiency, the power module assembly 2 is a separate assembly, and the power module assembly 2 is integrally mounted to the housing 1.

It should be noted that, the power module assembly 2 is pre-assembled, and the assembled power module assembly 2 is integrally mounted on the housing 1, that is, the power module assembly 2 is directly mounted on the housing 1, and each electrical component of the power module assembly 2 is not required to be separately mounted on the housing 1, so that the assembly of the power module assembly 2 is effectively simplified, and the assembly efficiency of the power module assembly 2 is improved.

Correspondingly, the capacitor cell assembly 3 is an independent assembly, and the capacitor cell assembly 3 is integrally mounted to the housing 1. Like this, electric capacity pond subassembly 3 has been assembled in advance, and the electric capacity pond subassembly 3 that has assembled is whole installs on casing 1, and electric capacity pond subassembly 3 is direct installs on casing 1 promptly, need not install every electric components and parts of electric capacity pond subassembly 3 alone on casing 1 to the assembly of electric capacity pond subassembly 3 has effectively been simplified, has improved the assembly efficiency of electric capacity pond subassembly 3.

Correspondingly, the board card assembly 4 is an independent assembly, and the board card assembly 4 is integrally mounted on the housing 1. Like this, the integrated circuit board subassembly 4 is assembled in advance, as shown in fig. 2 and 5, and the integrated circuit board subassembly 4 of having assembled is whole to be installed on casing 1, and board subassembly 4 is direct to be installed on casing 1 promptly, need not install every electric components and parts of board subassembly 4 on casing 1 alone to the assembly of board subassembly 4 has effectively been simplified, the assembly efficiency of board subassembly 4 has been improved.

In some embodiments, as shown in fig. 2, the power module assembly 2 includes a rectifying module 21 and an inverter module 22, and the rectifying module 21 and the inverter module 22 are sequentially distributed along the length direction of the housing 1.

The rectifier module 21 may be one or more than two. In order to increase the power density, the number of the rectifying modules 21 is at least two. Since the rectifying modules 21 need to be connected to an input member, any two rectifying modules 21 are distributed in order along the height direction of the housing 1 in order to reduce the width of the power unit.

As shown in fig. 3 and 4, the number of rectifying modules 21 is three, namely a first rectifying module 21a, a second rectifying module 21b and a third rectifying module 21c, wherein the input end of the first rectifying module 21a is connected with a first input copper bar 5a, the input end of the second rectifying module 21b is connected with a second input copper bar 5b, and the input end of the third rectifying module 21c is connected with a third input copper bar 5c. In this way, the occupation of the width space of the housing 1 by the first input copper bar 5a, the second input copper bar 5b, and the third input copper bar 5c is reduced, thereby reducing the width of the entire power unit.

Of course, the first input copper bar 5a, the second input copper bar 5b, and the third input copper bar 5c may be selected as other types of input members, and are not limited to copper bars.

The inverter module 22 may be one or more than two. In order to increase the power density, there are at least two inverter modules 22. In order to fully utilize the space in the longitudinal direction of the housing 1, any two inverter modules 22 are distributed in sequence along the longitudinal direction of the housing 1.

As shown in fig. 4, the number of inverter modules 22 is two, and the two inverter modules 22 are distributed in sequence along the longitudinal direction of the housing 1.

In the above structure, three rectifying modules 21 are connected in parallel, and the three rectifying modules 21 are input to the capacitor cell assembly 3 in parallel, and the capacitor cell assembly 3 is output to two inverter modules 22. It will be appreciated that two inverter modules 22 are arranged in parallel.

In order to facilitate the electrical connection between the rectifying module 21 and the inverting module 22 and the capacitor cell assembly 3, the output end of the rectifying module 22 is connected to the input end of the capacitor cell assembly 3 through the conductive member 24, and the input end of the inverting module 22 is directly connected to the output end of the capacitor cell assembly 3.

In the case that the capacitor cell assembly 3 includes the capacitor 32 and the capacitor support 31, the input end of the capacitor cell assembly 3 is the input end of the capacitor support 31, the output end of the capacitor cell assembly 3 is the output end of the capacitor support 31, the input end of the capacitor support 31 may be an input bus, and the output end of the capacitor support 31 may be an output bus.

The conductive member 24 may be a copper bar or other conductive member, which is not limited in this embodiment.

The power module assembly 2 is a heat generating assembly, and heat needs to be dissipated in order to ensure the normal operation of the power module assembly 2. In some embodiments, the power module assembly 2 further includes a heat dissipating device 23, and the rectifying module 21 and the inverting module 22 are disposed on the heat dissipating device 23. In this way, the heat dissipation device 23 can directly dissipate heat of the rectifying module 21 and the inverting module 22, thereby improving the heat dissipation effect.

To facilitate heat dissipation and to facilitate electrical connection of the board card assembly 4 and the power module assembly 2, the board card assembly 4 is located on a side of the rectifier module 21 and the inverter module 22 remote from the heat sink 23. As shown in fig. 2, the board assembly 4 is located at the left side of the rectifying module 21 and the inverting module 22, and the heat dissipating device 23 is located at the right side of the rectifying module 21 and the inverting module 22.

In some embodiments, the board assembly 4 includes at least two circuit boards, at least one of which is electrically connected to the power module assembly 2, and at least one of which is electrically connected to the capacitive cell assembly 3.

As shown in fig. 5, the board assembly 4 includes: the circuit board support 45 is arranged on the control board 41, the driving board 42, the power board 43 and the lamp board 44 of the circuit board support 45; wherein, the drive plate 42 is connected with the adapter plate electricity of contravariant module 22, and drive plate 42 is connected with control panel 41 electricity, and power strip 43 and electric capacity pond subassembly 3 electricity are connected in order to realize that power strip 43 supplies power for electric capacity pond subassembly 3, and lamp plate 44 and electric capacity pond subassembly 3 electricity are connected. It is understood that the control board 41, the driving board 42, the power source board 43, and the lamp board 44 are circuit boards.

Of course, the board card assembly 4 may alternatively not include the light board 44 or the board card assembly 4 may include other circuit boards, which is not limited to the structure shown in fig. 5.

For ease of installation, the above-described circuit board support 45 may be selected to be perpendicular to the width direction of the housing 1.

In the above-described power unit, the specific structure of the housing 1 is selected according to the actual situation. In some embodiments, as shown in fig. 1 and 2, to facilitate the installation of the various components, the housing 1 comprises: a main body frame 11, a first cover plate 12 and a second cover plate 13 respectively provided at both sides of the main body frame 11; wherein the first cover plate 12 and the second cover plate 13 are distributed in sequence in the width direction of the housing 1.

In the mounting process, the power module assembly 2, the capacitor cell assembly 3 and the board card assembly 4 are mounted on the main body frame 11, and then the first cover plate 12 and the second cover plate 13 are mounted.

In order to facilitate forming the relatively closed casing 1, the first cover plate 12 is in a flat plate shape, the second cover plate 13 is in an L shape, a part of the second cover plate 13 is parallel to the first cover plate 12, and another part of the second cover plate 13 is located at the top end of the main body frame 11. In order to improve the overall strength, the housing 1 further includes a top plate 14, the top plate 14 is fixed to the top end of the main body frame 11, and the top plate 14 is located between the main body frame 11 and the second cover 13.

Of course, the housing 1 may be alternatively constructed, and is not limited to the construction shown in fig. 2.

Based on the power units provided in the foregoing embodiments, this embodiment further provides a power unit cascade structure, where the power unit cascade structure includes at least two power units, and any two power units are sequentially distributed along a width direction of the power unit. It will be appreciated that two adjacent power cells are electrically connected to effect a cascade.

Because the power unit provided by the above embodiment has the above technical effects, the above power unit cascade structure includes the power units described in the above embodiment, and the above power unit cascade structure also has corresponding technical effects, which are not described herein again.

Based on the power unit cascade structure provided in the foregoing embodiment, this embodiment further provides a power electronic device, where the power electronic device includes the foregoing power unit cascade structure.

The power unit cascade structure provided by the above embodiment has the above technical effects, and the above power electronic device includes the power unit cascade structure described in the above embodiment, so that the above power electronic device also has corresponding technical effects, which are not described herein again.

The power electronic device may be an inverter or other devices, and the type of the power electronic device is not limited in this embodiment.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (13)

1. A power cell, comprising: the power module comprises a shell (1), a power module assembly (2), a capacitor pool assembly (3) and a board card assembly (4) which are all arranged in the shell (1);

the power module assembly (2) and the capacitor pool assembly (3) are sequentially distributed along the height direction of the shell (1); in the width direction of the shell (1), the board card assembly (4) is positioned on the same side of the power module assembly (2) and the capacitor cell assembly (3).

2. The power unit according to claim 1, characterized in that the capacitive cell assembly (3) comprises a capacitive support (31) and a capacitor (32); wherein the capacitor (32) is provided to the capacitor support body (31) along the width direction of the case (1).

3. The power cell of claim 2, wherein the power cell comprises a plurality of power cells,

the capacitor support body (31) is perpendicular to the width direction of the housing (1);

and/or a capacitor mounting hole is reserved in the capacitor support body (31), and all capacitors (32) are electrically connected with the capacitor support body (31).

4. The power unit according to claim 1, characterized in that the capacitive cell assembly (3) and the power module assembly (2) are distributed in sequence from bottom to top in the height direction of the housing (1), the board card assembly (4) being close to the top of the capacitive cell assembly (3) and the power module assembly (2).

5. The power cell of claim 1, wherein the power cell comprises a plurality of power cells,

the power module assembly (2) is an independent assembly, and the power module assembly (2) is integrally arranged on the shell (1);

and/or, the capacitor pool component (3) is an independent component, and the capacitor pool component (3) is integrally arranged on the shell (1);

and/or, the board card assembly (4) is an independent assembly, and the board card assembly (4) is integrally mounted on the shell (1).

6. The power unit according to claim 1, characterized in that the power module assembly (2) comprises a rectifying module (21) and an inverting module (22), the rectifying module (21) and the inverting module (22) being distributed in sequence along the length direction of the housing (1).

7. The power cell of claim 6, wherein the power cell comprises a plurality of power cells,

at least two rectifying modules (21) are arranged, and any two rectifying modules (21) are sequentially distributed along the height direction of the shell (1);

and/or at least two inverter modules (22), wherein any two inverter modules (22) are distributed in sequence along the length direction of the shell (1).

8. The power unit according to claim 7, characterized in that the output of the rectifying module (21) is switched to the input of the capacitive cell assembly (3) by means of a conductive element (24), the input of the inverting module (22) being directly connected to the output of the capacitive cell assembly (3).

9. The power unit according to claim 6, characterized in that the power module assembly (2) further comprises a heat sink (23), the rectifier module (21) and the inverter module (22) being both arranged at the heat sink (23).

10. The power unit according to claim 9, characterized in that the board card assembly (4) is located at a side of the rectifying module (21) and the inverting module (22) remote from the heat dissipating device (23).

11. The power unit according to any of claims 1-10, characterized in that the housing (1) comprises: a main body frame (11), a first cover plate (12) and a second cover plate (13) respectively arranged at two sides of the main body frame (11); wherein, in the width direction of the shell (1), the first cover plate (12) and the second cover plate (13) are distributed in sequence.

12. A power unit cascade structure, characterized by comprising at least two power units according to any one of claims 1-11, wherein any two of the power units are distributed in sequence along the width direction of the power unit.

13. A power electronic device comprising the power cell cascade structure of claim 12.

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