CN221509385U - An inverter - Google Patents

Abstract

The utility model discloses an inverter, comprising: the radiator comprises three radiating bodies which are mutually connected, wherein the three radiating bodies enclose a radiating cavity, the radiating cavity extends along the first direction, each radiating body comprises a fluid channel, and a radiating medium can flow between the radiating cavity and the fluid channel; and each power module is attached to the outer surface of the corresponding radiating main body. The utility model has compact structure, and is suitable for small space and good heat dissipation effect.

Description

An inverter

Technical Field

The utility model relates to the field of power electronics, in particular to an inverter.

Background Art

An inverter is a power conversion device that can convert DC power into constant frequency and voltage or frequency and voltage alternating current. It is widely used in various devices such as automobiles, air conditioners, computers, and televisions.

The core architecture of the inverter usually includes power modules, capacitors and radiators. In actual assembly, flat and stacked styles are usually used. The flat style means that the capacitors and power modules are arranged left and right or front and back, and the radiator is located below the capacitors and/or power modules. The stacked style means that the capacitors are located above or below the power modules, and the radiator is located between the capacitors and the power modules. Then the corresponding control board and drive board are assembled to receive signals and commands from the vehicle control system. Such assembly makes the overall structure of the inverter not compact enough, and the space occupied is relatively large. It has high requirements for assembly space, and the current liquid cooling of the radiator is not suitable for narrow spaces under special structures (such as cylindrical spaces).

Utility Model Content

The purpose of the utility model is to solve the problem that the overall structure of the current inverter assembly is not compact enough, the space occupied is too large, the assembly space requirement is high, and the heat dissipation form is not suitable for a small space. The utility model provides an inverter that can achieve a compact structure, be suitable for a small space, and achieve a good heat dissipation effect.

In order to solve the above technical problems, the embodiment of the utility model discloses an inverter, comprising:

A radiator, the radiator extending along a first direction, the radiator comprising three radiator bodies connected to each other, the three radiator bodies enclosing a radiator cavity, the radiator cavity extending along the first direction, each of the radiator bodies comprising a fluid channel, and a radiator medium can flow between the radiator cavity and the fluid channel;

Three power modules, each of which is attached to the outer surface of the corresponding heat dissipation body.

The implementation manner of the present application adopts liquid cooling for heat dissipation, so the implementation manner of the present application is described by taking the cooling liquid as the heat dissipation medium as an example.

By adopting the above technical solution, the radiator is set as three interconnected heat dissipation bodies, and the three heat dissipation bodies surround a heat dissipation cavity, thereby changing the previous flat and stacked assembly methods. At the same time, the power module is attached to the outer surface of the corresponding heat dissipation body to make the structure more compact, and the circulation of coolant can be achieved in the compact structure to achieve the heat dissipation effect.

According to another specific embodiment of the present utility model, an embodiment of the present utility model discloses an inverter, wherein the cross section of the heat dissipation cavity is triangular along a second direction, and the second direction intersects with the first direction.

By adopting the above technical solution, the cross section of the heat dissipation cavity is set to a triangle, so that the three power modules can be respectively attached to the outer surface of the corresponding heat dissipation body, and the assembly is also compact, so that the inverter can be used and assembled even in a small space.

According to another specific embodiment of the present utility model, an embodiment of the present utility model discloses an inverter, wherein the inverter further includes a capacitor, and along the first direction, the capacitor is located at one end of the heat dissipation cavity.

By adopting the above technical solution, the capacitor is located at one end of the heat dissipation cavity, so that all the core modules of the inverter can be compactly assembled together, ensuring the functionality while reducing the assembly volume, achieving a compact structure suitable for small spaces.

According to another specific embodiment of the present invention, an inverter is disclosed in the embodiment of the present invention, wherein the fluid channel penetrates the heat dissipation body and includes a plurality of fluid channels arranged at intervals.

By adopting the above technical solution, the fluid channel penetrates the heat dissipation body, so that the coolant can flow along the fluid channel from the head end to the tail end of the heat dissipation body. In this way, the coolant can fully contact the power module and capacitor attached to the heat dissipation body, and can take away the heat generated by the power module and capacitor during operation, so as to achieve a good heat dissipation effect; at the same time, multiple fluid channels are set to increase the contact area between the coolant and the heat dissipation body, so that the heat dissipation effect is better.

According to another specific embodiment of the utility model, an inverter is disclosed in the embodiment of the utility model, wherein the radiator further comprises a flow distribution cover plate and a water distribution cover plate, wherein:

Along the first direction, the flow diversion cover plate is located between the heat dissipation cavity and the water diversion cover plate, the flow diversion cover plate includes a diversion port, the diversion port is communicated with the heat dissipation cavity, the water diversion cover plate and the outer periphery of the flow diversion cover plate and the end of the heat dissipation cavity form a guide channel, and the guide channel is communicated with the fluid channel;

The water-dividing cover plate comprises a first fluid through hole and a second fluid through hole, wherein the first fluid through hole is communicated with the flow-guiding channel, and the second fluid through hole is communicated with the flow-dividing port;

Among them, the heat dissipation medium can enter from the first fluid through hole and enter the fluid channel through the guide channel, or the heat dissipation medium can enter the diversion port from the second fluid through hole and then flow to the heat dissipation cavity through the diversion port; the heat dissipation medium can flow from the heat dissipation cavity to the diversion port and flow out from the second fluid through hole, or the heat dissipation medium can flow from the fluid channel to the guide channel and then flow out from the first fluid through hole.

By adopting the above technical scheme, by setting a first fluid through hole and a guide channel, and connecting the first fluid through hole and the guide channel, the coolant can flow into the guide channel when entering from the first fluid through hole, and at the same time, the guide channel is connected with the fluid channel, so that the coolant can flow from the guide channel to the fluid channel, thereby taking away the heat generated by the power module and the capacitor attached to the heat dissipation body during operation, so as to achieve a good heat dissipation effect, or the coolant can enter the guide channel from the fluid channel and then flow out from the first fluid through hole. The coolant can take away the heat of the power module attached to the heat dissipation body in the fluid channel, and then the coolant that has absorbed the heat passes through the guide channel and flows out from the first fluid through hole, and the coolant that has absorbed the heat of the power module is discharged.

According to another specific embodiment of the utility model, the embodiment of the utility model discloses an inverter, the radiator also includes a reverse cover plate, the reverse cover plate is located at one end of the heat dissipation cavity away from the water diversion cover plate, the reverse cover plate includes a first groove and a turning channel, the first groove is connected to the heat dissipation cavity, and the turning channel is connected to the fluid channel, wherein the heat dissipation medium can flow from the fluid channel to the turning channel, and then enter the first groove from the turning channel, and finally enter the heat dissipation cavity, or the heat dissipation medium can flow from the heat dissipation cavity to the first groove, and then enter the turning channel from the first groove, and finally enter the fluid channel.

By adopting the above technical scheme, a first groove and a turning channel are set, and the first groove is connected to the heat dissipation cavity, and the turning channel is connected to the fluid channel. After the coolant takes away the heat generated by the power module and the capacitor attached to the heat dissipation body during operation in the fluid channel and the first groove, the coolant can enter the first groove through the turning channel, and then enter the heat dissipation cavity, and then flow from the heat dissipation cavity to the diversion port, and flow out from the second fluid through hole, and the coolant that has absorbed the heat of the power module and the capacitor is discharged; or the coolant can flow into the heat dissipation cavity through the second fluid through hole, enter the heat dissipation cavity through the diversion port, and then enter the first groove and the turning channel, and enter the fluid channel through the turning channel. After the coolant takes away the heat generated by the power module and the capacitor attached to the heat dissipation body during operation in the fluid channel and the first groove, the coolant that has absorbed the heat flows out from the first fluid through hole through the guide channel, and the coolant that has absorbed the heat of the power module is discharged.

According to another specific embodiment of the present utility model, an inverter is disclosed in the embodiment of the present utility model, wherein the reverse cover plate, the flow diversion cover plate and the water diversion cover plate are all welded to the heat dissipation body by a brazing process.

By adopting the above technical solution, the reverse cover plate, the diversion cover plate and the water diversion cover plate are welded to the heat dissipation body through the brazing process. The process is simple and easy to operate, and can also ensure the overall sealing of the radiator, ensure that the coolant flows smoothly inside and will not overflow the radiator.

According to another specific embodiment of the present utility model, an inverter is disclosed in the embodiment of the present utility model, and each of the heat dissipation bodies is extruded from an aluminum alloy or a copper alloy.

By adopting the above technical solution, each heat dissipation body is formed by extrusion of aluminum alloy or copper alloy, which can reduce the production cost and production process. At the same time, the thermal conductivity of aluminum alloy and copper alloy is good, so that the heat generated by the power module can be better transferred to the heat dissipation body, so the coolant in the fluid channel can better play the heat dissipation effect.

According to another specific embodiment of the utility model, an embodiment of the utility model discloses an inverter, the inverter further includes a driving board and a control board, wherein the control board is electrically connected to the driving board;

The driving board is attached to one end of the power module away from the outer surface of the heat dissipation body, and is used to receive the signal of the control board and drive the power module to operate;

The control board is attached to one end of the capacitor away from the radiator and is used for receiving external commands.

By adopting the above technical solution, a control board is set to receive external commands and the control board is electrically connected to the drive board, so that the control board can transmit the external commands to the drive board, and the control board is attached to the end of the capacitor away from the radiator, so that the assembly is compact; a drive board is set to receive the signal of the control board and drive the power module to operate, and the drive board is attached to the end of the outer surface of the power module away from the heat dissipation body, so that the assembly is compact.

According to another specific embodiment of the present utility model, an inverter is disclosed in the embodiment of the present utility model, wherein a thermally conductive interface material is provided between the power module and the outer surface of the heat dissipation body.

By adopting the above technical solution, a thermal conductive interface material is arranged between the power module and the outer surface of the heat dissipation body, so that the heat generated by the power module during operation can be more fully transferred to the outer surface of the heat dissipation body, so that the coolant in the fluid channel can more fully take away the heat generated by the power module during operation, so as to achieve a better heat dissipation effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 shows a front view of an inverter provided by an embodiment of the utility model.

FIG. 2 shows a side view of an inverter provided by an embodiment of the present utility model.

FIG3 shows a three-dimensional view of a heat sink provided by an embodiment of the utility model.

FIG. 4 shows a three-dimensional view of the heat dissipation body provided by an embodiment of the utility model.

FIG5 is a cross-sectional view of a radiator provided by an embodiment of the present invention, showing a flow direction of the coolant.

FIG6 is a cross-sectional view of a radiator provided in an embodiment of the present invention, showing another flow direction of the coolant.

FIG. 7 shows an exploded view of a heat sink provided in an embodiment of the present utility model.

FIG8 shows an exploded view 1 of the inverter provided in an embodiment of the present utility model, wherein an exploded view of the first power module and the first driving board is shown.

FIG9 shows a second exploded view of the inverter provided in an embodiment of the present utility model, wherein an exploded view of the second power module and the second driving board is shown.

FIG10 shows a third exploded view of the inverter provided in an embodiment of the present utility model, in which an exploded view of a third power module and a third driving board is shown.

FIG. 11 is a three-dimensional diagram of a capacitor provided in an embodiment of the present utility model.

DETAILED DESCRIPTION

The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

The embodiment of the present application adopts liquid cooling for heat dissipation, so the embodiment of the present application is described by taking the heat dissipation medium as cooling liquid as an example.

The present application provides an inverter. Exemplarily, the inverter provided in the embodiments of the present application is applicable to various fields such as power electronics or new energy vehicle motor controllers.

With reference to FIGS. 1 to 6 , the inverter of the embodiment of the present application includes a heat sink 1 and three power modules. For the convenience of description, the three power modules are defined as a first power module 20, a second power module 21 and a third power module 22. The above-mentioned heat sink 1 extends along a first direction (the X direction shown in FIG. 3 ), and the heat sink 1 includes three heat dissipation bodies connected to each other. For the convenience of description, the three heat dissipation bodies are defined as a first heat dissipation body 10, a second heat dissipation body 11 and a third heat dissipation body 12, respectively. The first heat dissipation body 10, the second heat dissipation body 11 and the third heat dissipation body 12 enclose a heat dissipation cavity 13, and the heat dissipation cavity 13 extends along a first direction (i.e., the X direction shown in FIG. 4 ). The first heat dissipation body 10 includes a first fluid channel 100, the second heat dissipation body 11 includes a second fluid channel 110, and the third heat dissipation body 12 includes a third fluid channel 120.

Referring to Figure 4, the coolant can flow between the heat dissipation cavity 13, the first fluid channel 100, the second fluid channel 110 and the third fluid channel 120; referring to Figure 1 and combined with Figure 3, the first power module 20 is attached to the outer surface of the first heat dissipation body 10, the second power module 21 is attached to the outer surface of the second heat dissipation body 11, and the third power module 22 is attached to the outer surface of the third heat dissipation body 12.

Exemplarily, referring to Figures 3 and 4, by setting the radiator 1 as three interconnected heat dissipation bodies (i.e., a first heat dissipation body 10, a second heat dissipation body 11 and a third heat dissipation body 12), and the first heat dissipation body 10, the second heat dissipation body 11 and the third heat dissipation body 12 surround a heat dissipation cavity 13, thereby changing the previous flat and stacked assembly methods. Combined with Figure 1, the first power module 20 is attached to the outer surface of the first heat dissipation body 10, the second power module 21 is attached to the outer surface of the second heat dissipation body 11, and the third power module 22 is attached to the outer surface of the third heat dissipation body 12, so that the structure of the inverter is more compact, and the circulation of coolant can be achieved under the compact structure to achieve the heat dissipation effect.

Exemplarily, referring to Figures 4 and 5 in combination with Figure 1, along the second direction (i.e., the Y direction shown in Figure 7), the cross-section of the heat dissipation cavity 13 is triangular, the second direction (i.e., the Y direction shown in Figure 4) intersects with the first direction (i.e., the X direction shown in Figure 4), and the inverter also includes a capacitor 3, along the first direction (i.e., the X direction shown in Figure 1), the capacitor 3 is located at one end of the heat dissipation cavity 13 and is connected to the reverse cover plate 16 described later.

Exemplarily, referring to FIG. 4 and FIG. 5 and in combination with FIG. 1 , the cross section of the heat dissipation cavity 13 is set to a triangle, so that the three power modules can be attached to the outer surface of the corresponding heat dissipation body, that is, the first power module 20 can be attached to the outer surface of the first heat dissipation body 10, the second power module 21 can be attached to the outer surface of the second heat dissipation body 11, and the third power module 22 can be attached to the outer surface of the third heat dissipation body 12, and the assembly is also compact, so that the inverter can be used and assembled even in a small space. And by arranging the capacitor 3 at one end of the heat dissipation cavity 13, all the core modules of the inverter can be compactly assembled together, ensuring the function while reducing the assembly volume, so as to achieve a compact structure suitable for a small space.

The specific structure of the radiator 1 is described in detail below in conjunction with Figures 3 to 7 so that the direction of the coolant inside the radiator 1 can be understood, wherein Figure 5 shows one direction of the coolant (i.e., the direction of the dotted line in Figure 5), and Figure 6 shows another direction of the coolant (i.e., the direction of the dotted line in Figure 6).

Exemplarily, referring to FIG6 and FIG7, the radiator 1 further includes a flow diversion cover plate 14, a water diversion cover plate 15 and a reverse cover plate 16, wherein, along the first direction (i.e., the X direction shown in FIG7), the flow diversion cover plate 14 is located between the heat dissipation cavity 13 and the water diversion cover plate 15, and the flow diversion cover plate 14 includes a flow diversion port 140, wherein, along the Y direction shown in FIG7, the flow diversion port 140 is provided at the top of the flow diversion cover plate 14, but is not limited thereto, as long as the flow diversion port 140 is connected to the second fluid through hole 151 described later, the embodiment of the present application does not limit the specific setting position of the flow diversion port 140. The flow diversion port 140 is connected to the heat dissipation cavity 13, and the water diversion cover plate 15 forms a guide channel 141 with the outer periphery of the flow diversion cover plate 14 and the end of the heat dissipation cavity 13, and the guide channel 141 is respectively connected to the first fluid channel 100, the second fluid channel 110 and the third fluid channel 120.

Exemplarily, referring to Figure 4, the first fluid channel 100 runs through the first heat dissipation body 10, that is, the first fluid channel 100 runs through the first heat dissipation body 10 from the head end to the tail end of the first heat dissipation body 10 along the X direction shown in Figure 4, so that the coolant can flow from the head end to the tail end of the first heat dissipation body 10 along the first fluid channel 100, and the second fluid channel 110 runs through the second heat dissipation body 11.

That is to say, the second fluid channel 110 runs through the second heat dissipation body 11 from the head end to the tail end of the second heat dissipation body 11 along the X direction shown in Figure 4, so that the coolant can flow from the head end to the tail end of the second heat dissipation body 11 along the second fluid channel 110, and the third fluid channel 120 runs through the third heat dissipation body 12.

That is to say, the third fluid channel 120 runs through the third heat dissipation body 12 from the head end to the tail end along the X direction shown in Figure 4, so that the coolant can flow from the head end to the tail end of the third heat dissipation body 12 along the third fluid channel 120.

Exemplarily, continuing to refer to Figure 4, the first fluid channel 100, the second fluid channel 110 and the third fluid channel 120 respectively include a plurality of spaced-apart channels, and a plurality of first fluid channels 100, second fluid channels 110 and third fluid channels 120 are arranged at the same time, thereby increasing the contact area between the coolant and the first heat dissipation body 10, the second heat dissipation body 11 and the third heat dissipation body 12, thereby improving the heat dissipation effect.

Exemplarily, continuing to refer to Figures 6 and 7, the water diversion cover plate 15 includes a first fluid through hole 150 and a second fluid through hole 151, the first fluid through hole 150 is connected to the guide channel 141, the second fluid through hole 151 is connected to the diversion port 140 and covers the diversion port 140, wherein the second fluid through hole 151 and the first fluid through hole 150 are arranged up and down along the Y direction shown in Figure 7, but are not limited to this, and can also be arranged left and right.

Exemplarily, continuing to refer to Figures 6 and 7, the reverse cover plate 16 is located at one end of the heat dissipation cavity 13 away from the water diversion cover plate 15, and the reverse cover plate 16 includes a first groove 160 and three turning channels. For the convenience of description, the three turning channels are defined as a first turning channel 161, a second turning channel 162 and a third turning channel 163, respectively. The first groove 160 is connected to the heat dissipation cavity 13, the first turning channel 161 is connected to the first fluid channel 100, the second turning channel 162 is connected to the second fluid channel 110, and the third turning channel 163 is connected to the third fluid channel 120.

It should be noted that the embodiment of the present application does not limit the shape and setting position of the diversion port 140, the second fluid through hole 151 and the first fluid through hole 150, and they can be other shapes such as round or square. The second fluid through hole 151 and the first fluid through hole 150 can be set upside down or not on the same horizontal line, as long as the diversion port 140 is connected with the second fluid through hole 151.

For example, referring to FIG. 5 and FIG. 7 in combination with FIG. 1 , FIG. 5 shows a flow direction of the coolant in the radiator 1, that is, flowing in the direction of the dotted arrow shown in FIG. 5 , that is, the coolant enters from the first fluid through hole 150, and enters the first fluid channel 100, the second fluid channel 110, and the third fluid channel 120 through the guide channel 141; as the coolant flows in the first fluid channel 100, the second fluid channel 110, and the third fluid channel 120, the heat generated when the first power module 20 attached to the first heat dissipation body 10 is working can be fully taken away, and the heat generated when the first power module 20 attached to the second heat dissipation body 10 is connected to the second heat dissipation body 10. The heat generated by the second power module 21 attached to the heat body 11 during operation and the heat generated by the third power module 22 attached to the third heat dissipation body 12 during operation, then the coolant in the first fluid channel 100 flows to the first turning channel 161, the coolant in the second fluid channel 110 flows to the second turning channel 162, the coolant in the third fluid channel 120 flows to the third turning channel 163, and finally converges to the first groove 160, and can also take away the heat of the capacitor 3 attached to the reverse cover plate 16, and finally the coolant enters the heat dissipation cavity 13 from the first groove 160.

Exemplarily, referring to Figures 5 and 7 in combination with Figure 1, the coolant that takes away the heat from the first power module 20, the second power module 21, the third power module 22 and the capacitor 3 flows from the heat dissipation cavity 13 to the diversion port 140, and is finally discharged through the second fluid through hole 151.

Exemplarily, referring to Figures 6 and 7 in combination with Figure 1, Figure 6 shows another flow direction of the coolant in the radiator 1, that is, it flows in the direction of the dotted arrow shown in Figure 6, that is, the coolant enters from the second fluid through hole 151, enters the heat dissipation cavity 13 through the diverter port 140, and then enters the first groove 160 to take away the heat of the capacitor 3 attached to the reverse cover plate 16, and then enters the first fluid channel 100, the second fluid channel 110 and the third fluid channel 120 through the first turning channel 161, the second turning channel 162 and the third turning channel 163 respectively; as the coolant flows in the first fluid channel 100, the second fluid channel 110 and the third fluid channel 120, it can fully take away the heat generated by the first power module 20 attached to the first heat dissipation body 10 when it is working, the heat generated by the second power module 21 attached to the second heat dissipation body 11 when it is working, and the heat generated by the third power module 22 attached to the third heat dissipation body 12 when it is working.

Exemplarily, referring to FIG5 and FIG7 and in combination with FIG1, the coolant that takes away the heat of the first power module 20, the second power module 21, the third power module 22 and the capacitor 3 passes through the guide channel 141 and is discharged from the first fluid through hole 150. Exemplarily, referring to FIG3 and FIG7, the reverse cover plate 16, the flow diversion cover plate 14 and the water diversion cover plate 15 are all welded to the heat dissipation body 1 by a brazing process to ensure the sealing inside the radiator 1, but it is not limited thereto, and other connection methods can also be selected, such as bolt connection and sealing with a sealing gasket.

Exemplarily, referring to Figures 1 and 4, the first heat dissipation body 10, the second heat dissipation body 11 and the third heat dissipation body 12 are all extruded from aluminum alloy or copper alloy, which can reduce the production cost and production process. At the same time, the thermal conductivity of aluminum alloy and copper alloy is good, so that the heat generated by the first power module 20 can be better transferred to the first heat dissipation body 10, the heat generated by the second power module 21 can be better transferred to the second heat dissipation body 11, and the heat generated by the third power module 22 can be better transferred to the third heat dissipation body 12. Therefore, the coolant in the first fluid channel 100, the second fluid channel 110 and the third fluid channel 120 can better exert the heat dissipation effect.

Exemplarily, referring to Figures 7 to 10, the inverter also includes three drive boards, namely a first drive board 40, a second drive board 41 and a third drive board 42. The first drive board 40 is installed on the end of the first power module 20 away from the outer surface of the first heat dissipation body 10 by bolts, and is electrically connected to the signal terminal on the first power module 20 (not shown in the figure). The second drive board 41 is installed on the end of the second power module 21 away from the outer surface of the second heat dissipation body 11 by bolts, and is electrically connected to the signal terminal on the second power module 21 (not shown in the figure). The third drive board 42 is installed on the end of the third power module 22 away from the outer surface of the third heat dissipation body 12 by bolts, and is electrically connected to the signal terminal on the third power module 22 (not shown in the figure). The first drive board 40 is used to receive the signal of the control board 5 and drive the first power module 20 to perform current conversion work, the second drive board 41 is used to receive the signal of the control board 5 and drive the second power module 21 to perform current conversion work, and the third drive board 42 is used to receive the signal of the control board 5 and drive the third power module 22 to perform current conversion work.

Exemplarily, referring to Figures 7 to 10, the inverter also includes a control board 5, wherein the control board 5 is electrically connected to the first drive board 40, the second drive board 41 and the third drive board 42 respectively; the control board 5 is attached to the end of the capacitor 3 away from the radiator 1 for receiving external commands.

It should be noted that the embodiment of the present application does not restrict the connection relationship between the first drive plate 40 and the first power module 20, the second drive plate 41 and the second power module 21, the third drive plate 42 and the third power module 22, and the first power module 20 and the first heat dissipation body 10, the second power module 21 and the second heat dissipation body 11, and the third power module 22 and the third heat dissipation body 12, which can be bolted or welded.

Exemplarily, a thermal interface material, such as a thermal pad, is provided between the first power module 20, the second power module 21 and the third power module 22 and the outer surfaces of the first heat dissipation body 10, the second heat dissipation body 11 and the third heat dissipation body 12, respectively, but it is not limited thereto and may also be other thermally conductive materials, such as thermally conductive silica gel. By providing a thermal interface material between the power module and the outer surface of the heat dissipation body, the heat generated by the power module during operation can be more fully transferred to the outer surface of the heat dissipation body, so that the coolant in the fluid channel can more fully take away the heat generated by the power module during operation, so as to achieve a better heat dissipation effect.

Exemplarily, referring to Figures 8 to 10, the end of the first power module 20 away from the capacitor 3 is connected to the first AC copper bus 60, the end of the second power module 21 away from the capacitor 3 is connected to the second AC copper bus 61, the end of the third power module 22 away from the capacitor 3 is connected to the third AC copper bus 62, and the capacitor 3 is connected to a positive copper bus 63 and a negative copper bus 64.

Exemplarily, referring to Figures 8 to 10, the end of the first power module 20 close to the capacitor 3 is connected to the first positive signal terminal 201 and the first negative signal terminal 202, the end of the second power module 21 close to the capacitor 3 is connected to the second positive signal terminal 211 and the second negative signal terminal 212, and the end of the third power module 22 close to the capacitor 3 is connected to the third positive signal terminal 221 and the third negative signal terminal 222. Referring to Figures 8 and 11, the first positive connection terminal 30, the first negative connection terminal 31, the second positive connection terminal 32, the second negative connection terminal 33, the third positive connection terminal 34 and the third negative connection terminal 35 are arranged along the circumference of the capacitor 3 (i.e., the direction A shown in Figure 11).

Exemplarily, the first positive signal terminal 201 is electrically connected to the first positive connection terminal 30, the first negative signal terminal 202 is electrically connected to the first negative connection terminal 31, the second positive signal terminal 211 is electrically connected to the second positive connection terminal 32, the second negative signal terminal 212 is electrically connected to the second negative connection terminal 33, the third positive signal terminal 221 is electrically connected to the third positive connection terminal 34, and the third negative signal terminal 222 is electrically connected to the third negative connection terminal 35.

Exemplarily, high-voltage direct current is input into the capacitor 3 through the positive copper busbar 63 and the negative copper busbar 64, and then input into the corresponding first positive signal terminal 201, first negative signal terminal 202, second positive signal terminal 211, second negative signal terminal 212, third positive signal terminal 221 and third negative signal terminal 222 through the first positive connection terminal 30, first negative connection terminal 31, second positive connection terminal 32, second negative connection terminal 33, third positive connection terminal 34 and third negative connection terminal 35 of the capacitor 3 respectively. The current is converted inside the first power module 20, the second power module 21 and the third power module 22, and then output to the three-phase line of the motor (not shown) by the first AC copper busbar 60, the second AC copper busbar 61 and the third AC copper busbar 62, converting the direct current into alternating current.

Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims (10)

1. An inverter is provided, which comprises a first inverter and a second inverter, characterized by comprising the following steps:

The radiator comprises three radiating bodies which are connected with each other, wherein the three radiating bodies enclose a radiating cavity, the radiating cavity extends along the first direction, each radiating body comprises a fluid channel, and a radiating medium can flow between the radiating cavity and the fluid channel;

and each power module is attached to the outer surface of the corresponding heat dissipation main body.

2. The inverter of claim 1, wherein the heat dissipation cavity has a triangular cross-section along a second direction, the second direction intersecting the first direction.

3. The inverter of claim 2, further comprising a capacitor located at one end of the heat dissipating cavity in the first direction.

4. The inverter of claim 1, wherein the fluid passage extends through the heat dissipating body and comprises a plurality of spaced apart channels.

5. The inverter of claim 1, wherein the heat sink further comprises a shunt cover plate and a water diversion cover plate, wherein,

The flow dividing cover plate is positioned between the heat dissipation cavity and the water dividing cover plate along the first direction, the flow dividing cover plate comprises a flow dividing opening, the flow dividing opening is communicated with the heat dissipation cavity, a flow guiding channel is formed by the water dividing cover plate, the outer periphery of the flow dividing cover plate and the end part of the heat dissipation cavity, and the flow guiding channel is communicated with the fluid channel;

The water diversion cover plate comprises a first fluid through hole and a second fluid through hole, the first fluid through hole is communicated with the diversion channel, and the second fluid through hole is communicated with the diversion port;

The heat dissipation medium can enter from the first fluid through hole, enter the fluid channel through the diversion channel, or enter the shunt opening from the second fluid through hole, and then flow to the heat dissipation cavity through the shunt opening; the heat dissipation medium can flow from the heat dissipation cavity to the shunt opening and flow out from the second fluid through hole, or the heat dissipation medium can flow from the fluid channel to the diversion channel and flow out from the first fluid through hole.

6. The inverter of claim 5, wherein the heat sink further comprises a reverse cover plate positioned at an end of the heat dissipation cavity remote from the water diversion cover plate, the reverse cover plate comprising a first groove and a turning channel, the first groove being in communication with the heat dissipation cavity, the turning channel being in communication with the fluid channel, wherein the heat dissipation medium can flow from the fluid channel to the turning channel, then from the turning channel to the first groove, finally to the heat dissipation cavity, or the heat dissipation medium can flow from the heat dissipation cavity to the first groove, then from the first groove to the turning channel, finally to the fluid channel.

7. The inverter of claim 6, wherein the reverse cover plate, the shunt cover plate, and the shunt cover plate are all welded to the heat dissipating body by a brazing process.

8. The inverter of claim 1, wherein each of the heat dissipating bodies is extruded from an aluminum alloy or a copper alloy.

9. The inverter of any one of claims 1 to 8, further comprising a drive board and a control board, wherein the control board is electrically connected to the drive board;

The driving plate is attached to one end, far away from the outer surface of the radiating main body, of the power module and is used for receiving signals of the control plate and driving the power module to act;

The control board is attached to one end of the capacitor, which is far away from the radiator, and is used for receiving an external command.

10. The inverter of any of claims 1-8, wherein a thermally conductive interface material is disposed between the power module and an outer surface of the heat dissipating body.