CN211377910U

CN211377910U - Power module and converter system

Info

Publication number: CN211377910U
Application number: CN201921761506.9U
Authority: CN
Inventors: 罗宣国; 李振升; 金传山; 晏辉
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: Sungrow Power Supply Co Ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-08-28
Anticipated expiration: 2029-10-18

Abstract

The utility model discloses a power module and conversion system, wherein the power module includes box, electric capacity and a plurality of power module, and electric capacity and power module are a plurality ofly, and electric capacity and power module all set up in the box, and all power module AC sides are parallelly connected to form the module unit, and the direct current side pressfitting generating line of module unit is single generating line, and all electric capacities are parallelly connected to form single capacitance pool, and single capacitance pool is connected with single generating line, and the output setting of module unit is on the box lateral wall. In the power module that this application provided, the parallelly connected module unit that forms of power module alternating current side, and the direct current side pressfitting generating line of module unit is single generating line, and all electric capacity are parallelly connected and are formed single capacitance pool, and single capacitance pool is connected with single generating line, and multiunit power module is parallelly connected, realizes energy mutual transmission and exchange in the capacitance pool.

Description

Power module and converter system

Technical Field

The utility model relates to an electronic components technical field, in particular to power module. The utility model discloses still relate to a converter system including above-mentioned power module.

Background

The development of power electronic technology, more and more power modules are formed by power conversion module units in photovoltaic and wind power industries, traditional power modules, buses and alternating current copper bars are of separate structures and are composed of two groups of independent structures, an upper cavity and a lower cavity are arranged on a capacitor, devices such as a switching power supply and the like are arranged in a cavity on the upper portion of the capacitor, and air enters the capacitor and the heat dissipation of the cavity on the upper portion of the capacitor from the side.

There is no direct current side output, there is no parallel connection of power units, and each capacitor is an independently arranged structure, the capacitor connecting end face is far away from the module end face, and mutual energy transfer and exchange can not be realized.

Therefore, how to transfer and exchange energy in the capacitor pool is a technical problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a power module to realize energy transfer and exchange in the capacitance pond. Another object of the present invention is to provide a converter system including the above power module.

In order to achieve the above object, the utility model provides a power module, including box, electric capacity and a plurality of power module, electric capacity with power module is a plurality ofly, electric capacity with power module all sets up in the box, all the power module exchanges the parallelly connected module unit that forms of side, just the direct current side pressfitting generating line of module unit is single generating line, all the electric capacity is parallelly connected to form single capacitance pool, single capacitance pool with single bus connection, the output setting of module unit is on the box lateral wall.

Preferably, the input end and the output end of the direct current side pressing bus are both positioned at the top of the box body.

Preferably, the capacitor further comprises a radiator and a heat insulation plate body which is arranged in the box body and used for isolating the heat dissipation air duct of the radiator from the capacitor.

Preferably, the heat dissipation air duct is a front-rear hidden straight-through air duct.

Preferably, the front panel of the box body is provided with an air inlet communicated with the heat dissipation air duct, and the air inlet comprises a main air inlet and an auxiliary air inlet.

Preferably, the main air inlet and the auxiliary air inlet are both multiple, and the main air inlet and the auxiliary air inlet are arranged in rows along the vertical direction.

Preferably, the front panel is detachably connected with a main case of the case.

Preferably, the alternating current copper bar assembly is further included, all the alternating current copper bar assemblies are connected in parallel, and the output end of each alternating current copper bar assembly is located at the bottom end of the box body.

Preferably, all the capacitors are arranged in a line from top to bottom.

A current transformation system comprises at least one power module, the power module is any one of the power modules, and the current transformation system further comprises an air collection and exhaust cavity, and air outlets of all the power modules are connected with the air collection and exhaust cavity.

In the technical scheme, the utility model provides a power module includes box, electric capacity and a plurality of power module, and electric capacity and power module are a plurality ofly, and electric capacity and power module all set up in the box, and all power module alternating current sides are parallelly connected to form the module unit, and the direct current side pressfitting generating line of module unit is single generating line, and all electric capacities are parallelly connected to form single capacitance pool, and single capacitance pool and single bus connection, the output setting of module unit are on the box lateral wall.

According to the description, in the power module provided by the application, the alternating current sides of the power modules are connected in parallel to form the module unit, the direct current side pressing bus of the module unit is a single bus, all capacitors are connected in parallel to form a single capacitance pool, the single capacitance pool is connected with the single bus, and the multiple groups of power modules are connected in parallel to realize energy transfer and exchange in the capacitance pool.

Drawings

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

Fig. 1 is a schematic structural diagram of a power module according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a power module with another view angle according to an embodiment of the present invention;

fig. 3 is an internal structural view of a power module according to an embodiment of the present invention;

fig. 4 is a parallel circuit diagram of a power module according to an embodiment of the present invention;

fig. 5 is a diagram illustrating an installation position of a plurality of power modules according to an embodiment of the present invention;

fig. 6 is a diagram of an installation position of another plurality of power modules according to an embodiment of the present invention.

Wherein in FIGS. 1-6: 1-front panel, 2-alternating current copper bar assembly, 3-frame, 4-capacitor, 5-absorption capacitor, 6-power module, 7-direct current side compression bus, 8-radiator, 9-cover plate, 10-cathode, 11-anode, 12-insulation plate and 13-single capacitor cell.

Detailed Description

The core of the utility model is to provide a power module to realize energy transfer and exchange in the capacitance pond. Another core of the present invention is to provide a converter system including the above power module.

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

Please refer to fig. 1 to fig. 6.

In a specific implementation manner, the utility model discloses the power module that specific embodiment provided includes box, electric capacity 4 and a plurality of power module 6, can match absorption electric capacity 5 according to operating characteristic in the power module. Specifically, the power module 6 is an IGBT module. The lateral part of box is equipped with apron 9, and electric capacity 4 and power module 6 are a plurality ofly, and electric capacity 4 and power module 6 all set up in the box. As shown in fig. 4, the ac sides of all the power modules 6 are connected in parallel to form a module unit, the D3 terminal is an ac copper bar output terminal, and the dc-side pressed bus 7 of the module unit is a single bus 13, i.e. all the power modules 6 share the same output and input terminals after being connected, wherein the dc-side pressed bus 7 includes two terminals, one is a positive terminal and the other is a negative terminal, as shown in the figure D1 and D2. All the capacitors 4 are connected in parallel to form a single capacitor pool, namely, the single capacitor pool is an integral structure formed by connecting all the capacitor pools in parallel, the single capacitor pool is connected with a single bus, and the output end of the power module is arranged on the side wall of the box body. The capacitor 4 adopts a single pressed bus, and inputs or outputs are carried out on the upper part of the module to realize parallel connection.

In order to facilitate the parallel wiring of the capacitors 4, all capacitors 4 are preferably arranged in a line from top to bottom, as shown in fig. 3. Specifically, all capacitors 4 are installed on one side in the box body. Specifically, two terminals of the capacitor 4 extend to two opposite ends in the box thickness direction, respectively, where the box thickness direction is the shortest side of the frame in the rectangular box.

In order to improve the universality of the power module, as shown in fig. 3, preferably, one of the two terminals of the capacitor 4 is located on the side wall of the box body, and the other one is located inside the box body, specifically, one terminal of the capacitor 4 is close to the power module 6, specifically, the two terminals of the capacitor 4 are connected in a line, and the line is perpendicular to the thickness direction of the box body, so that the length of the capacitor 4 is prevented from being influenced by the thickness of the box body, and the capacitor 4 with a proper length can be selected according to actual requirements during assembly.

In order to facilitate the mounting of the various components in the housing, a frame 3 is mounted in the housing, wherein the capacitor 4 is directly fixed on the side of the frame 3. The positive and negative electrodes of the power module 6 are connected through a pressed bus 7; the alternating current sides of the power modules 6 are all connected in parallel, wherein the positive pole and the negative pole of the direct current side of the power modules 6 are all connected in parallel respectively, and are led out at corresponding positions of the top as required.

As can be seen from the above description, in the power module provided in the present application, the ac sides of the power modules 6 are connected in parallel to form a module unit, the dc side pressing bus 7 of the module unit is a single bus, all the capacitors 4 are connected in parallel to form a single capacitor pool, and the single capacitor pool is connected to the single bus, so that a plurality of power modules 6 can be connected in parallel, and energy transfer and exchange in the capacitor pool can be realized.

Specifically, the input end and the output end of the direct-current side pressing bus 7 are positioned at the top of the box body. The output/input of the direct current side pressing bus 7 is arranged at the top of the module, so that the parallel connection installation is convenient; specifically, all capacitors 4 are connected in parallel to form a single capacitor pool, and the working energy of the power modules is led out or introduced through the positive electrode 11 and the negative electrode 10, so that the parallel connection of multiple groups of power modules can be realized, and the application of an inversion, rectification or alternating current/direct current system can be realized, and the extended scheme is shown in fig. 5 and 6, specifically, the positive electrode 11 and the negative electrode 10 are isolated through the insulating plate 12.

In a specific embodiment, the power module further includes a heat sink 8 and a heat insulation plate disposed in the case and used for isolating the heat dissipation duct of the heat sink 8 from the capacitor 4. The capacitor 4 is isolated from the air channel, so that the influence of the heat of the air channel on the capacitor 4 is avoided, and the heat insulation plate body is additionally arranged between the air channel and the capacitor 4, so that the heat conduction backflow of the air channel is avoided.

Specifically, the heat dissipation air duct is a front-back hidden straight-through air duct. The straight-through air channel is smooth and has small airflow resistance. The heat dissipation air duct is a front-back hidden straight-through air duct, so that the heat dissipation capacity of the heat radiator 8 and the temperature equalization requirement of the power module 6 are guaranteed to the maximum extent.

In a specific embodiment, the front panel 1 of the box body is provided with an air inlet communicated with the air duct. Preferably, the air inlet comprises a main air inlet and an auxiliary air inlet. The heat dissipation air intake enters the power module from the front part of the frame 3, and no other side air intake exists. In order to protect the edge folding strength of the frame 3, the layout structure of the main air inlet holes and the multiple groups of auxiliary air inlet holes is adopted, the air quantity requirement of the air duct of the radiator 8 is ensured, and the resistance of radiating airflow is reduced. The air inlets are arranged on the front side, and the mode of adding the main air inlet holes and the auxiliary holes is adopted, so that the maximum air inlet amount is ensured.

Preferably, the main air inlet and the auxiliary air inlet are both multiple, and the main air inlet and the auxiliary air inlet are arranged in rows along the vertical direction. The air duct carries out multi-path air inlet through the main hole and the auxiliary hole of the front panel 1, reduces air inlet resistance and simultaneously considers the edge folding strength of the frame 3.

In order to facilitate the integral disassembly and assembly, the front panel 1 is preferably detachably connected with the main box body of the box body.

In a specific embodiment, the power module further comprises an ac copper bar assembly 2, and all the ac copper bar assemblies 2 are connected in parallel, and the output end of the ac copper bar assembly 2 is located at the bottom end of the box body. Focusing on the lower side input or output of the power module. This patent exchanges copper bar subassembly 2 and adopts whole parallel structure, and circuit connection is seen in figure 4. The power module is designed according to the requirement of the allowable current-sharing degree of the power module, the output working condition of the power module is consistent, the alternating current gathering input or output is finally formed, the alternating current side copper bar is led out from the lower side of the power module, the pushing and pulling out of the module in the installation process are not influenced, and the maintenance is facilitated.

The present application provides a converter system, including the power module, the power module is at least one, specifically, the power module can be two, three, etc., the power module is any one of the above-mentioned power modules, the foregoing has described the specific structure about the power module, the present application includes the above-mentioned power module, has the above-mentioned technological effect equally. The whole layout structure has good expansibility, and three, six or more groups of power modules can be quickly connected in parallel.

In a specific implementation mode, the converter system further comprises an air collecting and exhausting cavity, and air outlets of all the power modules are connected with the air collecting and exhausting cavity. The concentrated heat dissipation of a plurality of modules can be carried out by adding the air collecting cavity at the air outlet.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. 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 invention. Thus, the present invention 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

1. A power module comprises a box body, a capacitor (4) and a plurality of power modules (6), wherein the capacitor (4) and the power modules (6) are multiple, and the capacitor (4) and the power modules (6) are arranged in the box body, and is characterized in that alternating current sides of all the power modules (6) are connected in parallel to form a module unit, a direct current side pressing bus (7) of the module unit is a single bus, all the capacitors (4) are connected in parallel to form a single capacitor pool, the single capacitor pool is connected with the single bus, and an output end of the module unit is arranged on a side wall of the box body.

2. A power module according to claim 1, characterized in that the input and output of the dc-side press-fit busbar (7) are located at the top of the box.

3. The power module according to claim 1, further comprising a heat sink (8) and a heat insulation plate disposed in the case and configured to isolate a heat dissipation air duct of the heat sink (8) from the capacitor (4).

4. The power module as claimed in claim 3, wherein the heat dissipation duct is a front-rear hidden straight-through duct.

5. The power module as claimed in claim 3, wherein the front panel (1) of the housing is provided with an air inlet communicated with the heat dissipation air duct, and the air inlet comprises a main air inlet and an auxiliary air inlet.

6. The power module as claimed in claim 5, wherein the number of the main air inlets and the number of the auxiliary air inlets are plural, and the main air inlets and the auxiliary air inlets are arranged in rows in an up-down direction.

7. A power module according to claim 5, characterized in that the front panel (1) is detachably connected to the main housing of the housing.

8. The power module according to claim 1, further comprising an ac copper bar assembly (2), wherein all the ac copper bar assemblies (2) are connected in parallel, and the output end of the ac copper bar assembly (2) is located at the bottom end of the box body.

9. The power module according to any of claims 1 to 8, wherein all the capacitors (4) are arranged in a row from top to bottom.

10. A converter system comprises at least one power module, and is characterized in that the number of the power modules is at least one, the power module is as claimed in any one of claims 1 to 9, and the converter system further comprises an air collecting and exhausting cavity, and air outlets of all the power modules are connected with the air collecting and exhausting cavity.