Converter

Abstract

The utility model belongs to the field of converters, and particularly relates to a converter. Comprising a case, a partition plate and a control mainboard which are arranged in the case, and a charging unit, a capacitor unit, an inversion unit, a filtering unit and a grid-connected switch unit which are connected in sequence, the partition plate divides the interior of the case into an upper layer area and a lower layer area, the charging unit, the capacitor unit and the control mainboard are arranged in the upper layer area, and the filtering unit and the grid-connected switch unit are arranged in the lower layer area; the inverter further comprises a radiator, the radiator is located between the tail end of the case and the filtering unit, the side face or the top face of the radiator abuts against the partition plate in a matched mode to form a radiating channel, and the inverter unit is arranged on the top face of the radiator. The converter provided by the utility model can effectively improve the heat dissipation effect and the power density of the whole machine.

Description

Technical Field

[0001] The utility model belongs to the field of converters, and in particular relates to a converter. Background Art

[0002] Converters are widely used power electronic devices that play a vital role in power systems. To ensure proper operation, converters typically incorporate a control board, charging unit, capacitor unit, inverter unit, filter unit, and grid-connected switch unit. These components are typically installed in a planar layout (i.e., the control board, charging unit, capacitor unit, inverter unit, filter unit, and grid-connected switch unit are typically located on the same mounting surface).

[0003] Conventional converters in the prior art have some shortcomings. The main drawback is that the converter's electrical components are arranged in a planar manner, resulting in a large converter size and low space utilization, which leads to a bulky converter and low power density. Utility Model Content

[0004] The utility model provides a converter, which aims to solve the problem that the conventional converter has a low power density due to the planar layout of the internal electrical components.

[0005] In order to achieve the above object, the utility model provides a converter, comprising a chassis, a partition and a control mainboard arranged in the chassis, and a charging unit, a capacitor unit, an inverter unit, a filter unit and a grid-connected switch unit connected in sequence;

[0006] The partition divides the interior of the chassis into an upper area and a lower area, the charging unit, the capacitor unit and the control mainboard are arranged in the upper area, and the filtering unit and the grid-connected switch unit are arranged in the lower area;

[0007] It also includes a radiator, which is located between the rear end of the chassis and the filter unit. The side or top surface of the radiator abuts against the partition to form a heat dissipation channel, and the inverter unit is arranged on the top surface of the radiator.

[0008] This solution divides the chassis into layers, placing the charging unit, capacitor unit, inverter unit, and control board in the upper layer, and the filter unit and grid-connected switch unit in the lower layer. Compared to the conventional flat layout of converters, this improves space utilization and, in turn, increases the power density of the entire converter.

[0009] Preferably, the radiator is located on the bottom plate of the chassis, and the partition is in contact with the side surface of the radiator. The partition, the bottom plate and the side plate of the chassis enclose a heat dissipation channel.

[0010] Preferably, to achieve better heat dissipation for the filter unit, the filter unit of this embodiment includes multiple inductors, which are divided into two rows, and the two rows of inductors are staggered. Furthermore, preferably, in the direction of the heat dissipation path, the rear row of inductors is located between adjacent front row inductors or to one side of the outermost inductor, so that air is blown (extracted) from the edges of the front row inductors or the gaps between adjacent inductors to dissipate heat from the rear row inductors.

[0011] In this solution, multiple inductors are arranged in two staggered rows. Therefore, when cooling the filter unit, the inductors in the rear row will not be blocked by the inductors in the front row. The cooling airflow can contact and dissipate heat with each inductor, effectively improving the cooling effect of the inductors.

[0012] Preferably, the inverter unit described in this solution is a single-phase inverter or a three-phase inverter or a three-phase four-bridge-arm inverter, and the inverter unit includes multiple groups of inverter components, each group of inverter components includes multiple switching tubes; the top surface of the radiator contacts the heat dissipation surface of each switching tube.

[0013] This solution can achieve a better heat dissipation effect for the switching tube by allowing the top surface of the radiator to contact the heat dissipation surface of the switching tube.

[0014] Preferably, the inverter unit of this solution is a three-phase inverter, and the inverter components are three groups. Each group of inverter components includes at least one group of switching tubes connected in series, and the midpoint of each group of switching tubes is correspondingly connected to the inductor.

[0015] As another alternative, the inverter unit is a three-phase, four-leg inverter, with four inverter components. Each inverter component group includes at least one set of series-connected switching transistors, with the midpoint of each set of switching transistors correspondingly connected to an inductor. The switching transistors are silicon carbide MOSFETs.

[0016] Preferably, the grid-connected switch unit includes a circuit board and a plurality of electronic switches arranged on the circuit board.

[0017] Preferably, a fuse is provided between the filter unit and the grid-connected switch unit, and the transmission end of the inductor in the filter unit is connected to the electronic switch via the fuse.

[0018] Preferably, this solution further includes a first fan, which is arranged between the radiator and the filter unit, and the outlet wind of the first fan corresponds to the radiator.

[0019] In this solution, the first fan is arranged between the radiator and the filter unit. When the first fan is working, the first fan drives the air flow to blow toward the radiator, which is beneficial to improving the heat dissipation effect of the radiator.

[0020] Preferably, the lower part of the tail plate of the chassis in this solution is provided with heat dissipation holes corresponding to the radiator.

[0021] This solution connects the outside with the inside of the chassis through the heat dissipation holes. The airflow output from the radiator can be discharged to the outside through the heat dissipation holes.

[0022] Preferably, in order to achieve heat dissipation for the upper area of ​​the chassis, a second fan is provided on the upper part of the tail plate of the chassis in this solution, and the second fan corresponds to the upper area in the chassis.

[0023] This solution places a second fan in the upper area, driving airflow there. This airflow dissipates heat from the upper chassis area, further improving the overall heat dissipation of the converter.

[0024] The beneficial effects of the present invention are:

[0025] First, this solution divides the chassis interior into upper and lower areas. Based on electrical principles, different electrical components are sequentially installed in each area. Compared to the existing flat layout, this solution further utilizes space, reduces chassis size, and increases power density.

[0026] Second, the inductors are arranged in staggered rows, and the heat is dissipated from the lower area of ​​the chassis through the heat dissipation channel. Combined with the heat dissipation from the upper area, a better heat dissipation effect is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the converter chassis.

[0028] Figure 2 This is an exploded view of the electrical components inside the chassis.

[0029] Figure 3 This is a connection diagram for electrical components.

[0030] The reference numerals include: chassis 1, partition 11, tail plate 12, front plate 13, control main board 2, charging unit 3, capacitor unit 4, inverter unit 5, inverter assembly 51, radiator 52, filter unit 6, grid-connected switch unit 7, first fan 8, and second fan 9. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. When the following description refers to the drawings, unless otherwise indicated, identical numbers in different drawings represent identical or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0032] In this disclosure, unless otherwise specified, directional terms such as "inner" and "outer" are defined based on the contours of the corresponding components. Terms such as "first" and "second" are used in this disclosure to distinguish one element from another and do not convey order or importance.

[0033] Example

[0034] Basically as attached Figure 1 As shown, a converter mainly includes a chassis 1 and electrical components located inside the chassis 1, with the chassis 1 serving as a mounting base for the electrical components. The chassis 1 is preferably made by splicing and assembling metal plates. The chassis 1 formed by splicing and assembling is rectangular as a whole. A partition 11 is provided inside the chassis 1, and the partition 11 is arranged horizontally. The partition 11 can be fixedly installed inside the chassis 1 by fasteners. When the partition 11 is installed inside the chassis 1, the partition 11 divides the interior of the chassis 1 into an upper area and a lower area.

[0035] like Figure 1 and Figure 2 As shown, in the embodiment of the present disclosure, the charging unit 3, capacitor unit 4, inverter unit 5 and control mainboard 2 among the electrical components are arranged in the upper area of ​​the chassis 1, and the filter unit 6 and grid-connected switch unit 7 among the electrical components are arranged in the lower area. The charging unit 3, capacitor unit 4, inverter unit 5, filter unit 6 and grid-connected switch unit 7 are connected in sequence, as shown in FIG. Figure 3 The control mainboard 2 is used to control the operation of the entire converter.

[0036] The grid-connected switch unit 7 in the disclosed embodiment includes a circuit board and several electronic switches disposed on the circuit board. A fuse is disposed between the filter unit 6 and the grid-connected switch unit 7, and the transmission end of the inductor in the filter unit 6 is connected to the electronic switch via the fuse.

[0037] The inverter unit 5 is a single-phase inverter, a three-phase inverter, or a three-phase four-leg inverter. The three-phase inverter or three-phase four-leg inverter includes at least three sets of inverter assemblies 51. In this embodiment, the inverter unit 5 is a three-phase four-leg inverter, specifically comprising four sets of inverter assemblies 51. Each set of inverter assemblies 51 includes multiple switching transistors, each of which is a silicon carbide MOSFET. The inverter assemblies 51 are located in the upper region of the chassis 1. The heat sink 52 is located on the bottom plate of the chassis 1, and the top surface of the heat sink 52 abuts the heat dissipation surface of each switching transistor, allowing the heat sink 52 to dissipate heat from the switching transistors.

[0038] The radiator 52 is located on the bottom plate of the chassis 1, between the rear end of the chassis 1 and the filter unit 6. Meanwhile, the partition 11 can abut against the side of the radiator 52. Airflow from the bottom of the partition 11 can flow into the radiator 52, forming a heat dissipation channel under the partition 11.

[0039] It is understood that: in the embodiment of the present disclosure, the partition 11 is placed against the side of the radiator 52, but in some other embodiments, the partition 11 can also be installed above the radiator 52. The lower part of the partition 11 also forms a heat dissipation channel.

[0040] In order to achieve the flow of air, a first fan 8 is further provided between the radiator 52 and the filter unit 6 in the embodiment of the present disclosure. The air outlet of the first fan 8 is directly opposite to the radiator 52. When the first fan 8 is working, the first fan 8 can drive the air flow. The first fan 8 blows air to the radiator 52 and sucks air to the filter unit 6. At the same time, in order to allow the air flow to be discharged from the chassis 1, a heat dissipation hole is further constructed at the lower part of the tail plate 12 of the chassis 1 (the tail plate 12 of the chassis 1 is the side plate located at the rear end of the chassis 1) in the embodiment of the present disclosure, and the heat dissipation holes are distributed in a mesh shape. The air flow output from the radiator 52 can be discharged to the outside through the heat dissipation holes.

[0041] It is understood that in order to ensure that external air can enter the interior of the chassis 1, an inlet mesh is also provided on the front panel 13 of the chassis 1. The air can enter through the inlet mesh, then pass through the filter unit 6, the first fan 8 and the radiator 52 in sequence, and finally be discharged to the outside from the rear end of the chassis 1.

[0042] like Figure 2 As shown, in order to achieve a better heat dissipation effect, a second fan 9 is further provided on the upper portion of the rear panel 12 of the chassis 1 in the disclosed embodiment. The second fan 9 corresponds to the upper region inside the chassis 1, so that the upper region inside the chassis 1 also forms a heat dissipation channel. The second fan 9 can dissipate heat from the upper region inside the chassis 1. Similarly, to ensure that external airflow can enter the upper region of the chassis 1, the front panel 13 of the chassis 1 is also provided with an air intake mesh to adapt to the upper region of the chassis 1.

[0043] The filter unit 6 in the disclosed embodiment specifically includes multiple inductors, all mounted on a circuit board. To achieve better heat dissipation for the filter unit 6, the disclosed embodiment arranges the multiple inductors in two rows, front and back, with the inductors in the rows staggered. This staggered arrangement ensures that the inductors in the rear row are not blocked by the inductors in the front row, allowing the heat dissipation airflow to contact each inductor, achieving better heat dissipation.

[0044] The above is only an embodiment of the present invention, and the commonly known specific structures and characteristics of the scheme are not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, and these should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A converter, characterized in that: It includes a chassis, a partition and a control mainboard arranged in the chassis, and a charging unit, a capacitor unit, an inverter unit, a filter unit and a grid-connected switch unit connected in sequence; The partition divides the interior of the chassis into an upper area and a lower area, the charging unit, the capacitor unit and the control mainboard are arranged in the upper area, and the filtering unit and the grid-connected switch unit are arranged in the lower area; It also includes a radiator, which is located between the rear end of the chassis and the filter unit. The side or top surface of the radiator abuts against the partition to form a heat dissipation channel, and the inverter unit is arranged on the top surface of the radiator.

2. The converter according to claim 1, characterized in that: The filtering unit includes a plurality of inductors, which are divided into two rows, and the inductors in the two rows are staggered.

3. The converter according to claim 1, wherein: The inverter unit is a single-phase inverter or a three-phase inverter or a three-phase four-bridge-arm inverter. The inverter unit includes multiple groups of inverter components, and each group of inverter components includes multiple switching tubes. The top surface of the radiator contacts the heat dissipation surface of each switching tube.

4. The converter according to claim 3, characterized in that: The inverter unit is a three-phase inverter, and the inverter components are three groups; each group of inverter components includes at least one group of switching tubes connected in series, and the midpoint of each group of switching tubes is correspondingly connected to an inductor.

5. The converter according to claim 3, wherein: The inverter unit is a three-phase four-bridge-arm inverter, and the inverter components are four groups; each group of inverter components includes at least one group of switching tubes connected in series, and the midpoint of each group of switching tubes is correspondingly connected to the inductor, and the switching tube is a silicon carbide MOSFET.

6. The converter according to claim 4 or 5, characterized in that: The grid-connected switch unit includes a circuit board and a plurality of electronic switches arranged on the circuit board.

7. The converter according to claim 6, characterized in that: A fuse is provided between the filter unit and the grid-connected switch unit, and the transmission end of the inductor in the filter unit is connected to the electronic switch via the fuse.

8. The converter according to claim 1, characterized in that: The system further includes a first fan, which is arranged between the radiator and the filter unit, and the outlet wind of the first fan corresponds to the radiator.

9. The converter according to claim 1 or 8, characterized in that: The lower part of the tail plate of the chassis is provided with heat dissipation holes corresponding to the radiator.

10. The converter according to claim 1, characterized in that: A second fan is provided on the upper portion of the tail plate of the chassis, and the second fan corresponds to the upper area in the chassis.

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