An inverter

Abstract

The present invention relates to the field of inverter technology, and in particular to an inverter. The inverter includes a shell, a water channel assembly, a power module, a filter, a power board, a capacitor assembly, and a drive control board. The water channel assembly includes a water channel, an inlet, a first outlet, and a second outlet. The second outlet is arranged on the connection surface of the edge of the shell and is connected to the water channel. By setting up a double outlet and a detachable blocking block, the bottom or side water outlet mode can be selected according to the installation environment, and the second outlet can be directly connected to the built-in water channel of the chassis to reduce the pipeline transfer link. The capacitor assembly includes a film capacitor, an X capacitor, and a Y capacitor. Compared with an integrated capacitor, the use of multiple capacitors connected in parallel has a more uniform heat distribution and a lower single-point temperature due to current sharing. The drive control board is provided with a maintenance hole axially aligned with the connection point of the power module, so that the fasteners of the connection point can be maintained directly through the hole without disassembling the control board.

Description

Technical Field

[0001] The present invention relates to the technical field of inverters, and in particular to an inverter. Background Art

[0002] With the rapid development of new energy generation technologies, electric vehicles, and energy storage systems, inverters, as core devices for energy conversion, are facing increasing demands for integration, power density, and reliability. Traditional inverters often employ a split-body design, with subsystems such as power modules, filter units, and control circuits distributed and connected via cables. This results in a bulky overall design and complex assembly process. Especially in high-power applications, the mechanical stacking of multiple components significantly increases parasitic inductance, affecting the quality of high-frequency signal transmission. Furthermore, existing technologies often utilize integrated capacitor assemblies, which can easily lead to localized overheating. Existing power devices typically utilize independent air cooling or single-sided liquid cooling for heat dissipation, with the coolant typically entering through an inlet at one end and exiting through an outlet at the other. However, after exiting the outlet, the coolant must be piped to other components in the vehicle for further cooling, increasing assembly complexity and space requirements. Furthermore, existing inverter modules lack adequate maintenance access, requiring disassembly of multiple layers to inspect fasteners, significantly reducing on-site maintenance efficiency. Summary of the Invention

[0003] In view of this, the present invention provides an inverter to solve the above technical problems.

[0004] An inverter comprises a housing, a water channel assembly disposed on the housing, a power module disposed on the housing, a filter disposed on the housing, a power supply board disposed on the housing, a capacitor assembly disposed on the power supply board, and a drive control board disposed on the housing. The mounting opening is provided on the end face of the housing facing the power module. The water channel assembly comprises a water channel disposed on the housing, a mounting opening connected to the water channel, an inlet connected to the water channel, a first outlet connected to the water channel, and a second outlet connected to the water channel. The inlet and the first outlet are disposed on the end face of the housing away from the power module and communicate with the water channel. The second outlet is disposed on a connecting surface at the edge of the housing and communicates with the water channel. The inlet and the first and second outlets are located on opposite sides of the housing. The filter and the input terminals of the power module are connected to the power supply board on either side. The capacitor assembly comprises a plurality of thin-film capacitors disposed on the power supply board, a plurality of X capacitors disposed on the power supply board, and a plurality of Y capacitors disposed on the power supply board. The multiple thin film capacitors are arranged at intervals, the drive control board is integrated with a drive circuit and a control circuit, and a plurality of maintenance holes are provided on the drive control board. The positions of the maintenance holes are coaxial with the connection points between the power module and the shell and the connection points between the power module and the power board, and the positions correspond to each other.

[0005] Furthermore, a plurality of mounting posts are provided on the shell, the power board is provided on the mounting posts by inserting connecting posts, and the drive control board is provided on the mounting posts and the connecting posts by fasteners.

[0006] Furthermore, the X capacitor and the Y capacitor are arranged on an end surface of the power board away from the housing and close to the filter.

[0007] Furthermore, the heat dissipation column of the power module is immersed in the water channel through the installation opening.

[0008] Furthermore, the signal pin of the power module is inserted into the drive control board.

[0009] Furthermore, the water channel assembly also includes a water inlet pipe arranged on the inlet, and a blocking block detachably arranged on the first outlet or the second outlet, and the coolant is transported from the inlet into the water channel through the water inlet pipe.

[0010] Compared with the prior art, the inlet and the first outlet of the inverter provided by the present invention are provided on the end face of the shell away from the power module and are connected to the water channel. The second outlet is provided on the connection surface of the edge of the shell and is connected to the water channel. The coolant is transported into the water channel from the inlet through the water inlet pipe. By providing a dual outlet and a removable blocking block, the coolant can be discharged from the bottom or side according to the installation environment. When the inverter is installed in the chassis, the second outlet can be directly connected to the built-in water channel of the chassis, reducing the pipe connection link. The thin film capacitor is provided on the lower side of the power board, while the X capacitor and the Y capacitor are provided on the upper side of the power board. This layout can form a spatial isolation in the vertical direction through the power board, which can avoid the mutual coupling of the electric fields of different capacitors. The drive control board is provided with a maintenance hole axially aligned with the power module connection point, so that the fasteners of the power module connection point can be maintained directly through the hole without disassembling the control board, shortening the on-site maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural diagram of an inverter provided by the present invention.

[0012] Figure 2 for Figure 1 Schematic diagram of the decomposed structure of the inverter.

[0013] Figure 3 for Figure 1 Schematic diagram of the inverter's decomposition structure from another angle.

[0014] Figure 4 for Figure 1 A cross-sectional view of the inverter.

[0015] Figure 5 for Figure 1 Schematic diagram of the structure of the power module, filter, power board and capacitor components of the inverter.

[0016] Explanation of the accompanying drawings: shell 10, water channel assembly 20, power module 30, filter 40, power board 50, capacitor assembly 60, drive control board 70, mounting column 11, connecting column 12, water channel 21, mounting port 22, inlet 23, first outlet 24, second outlet 25, water inlet pipe 26, blocking block 27, film capacitor 61, X capacitor 62, Y capacitor 63, maintenance hole 71. DETAILED DESCRIPTION

[0017] The following is a further detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0018] like Figures 1 to 5, which is a schematic structural diagram of the inverter provided by the present invention. The inverter includes a housing 10, a water channel assembly 20 disposed on the housing 10, a power module 30 disposed on the housing 10, a filter 40 disposed on the housing 10, a power board 50 disposed on the housing 10, a capacitor assembly 60 disposed on the power board 50, and a drive control board 70 disposed on the housing 10. It is conceivable that the inverter also includes other functional modules, such as connection components and mounting components, etc., which are well known to those skilled in the art and will not be described in detail here.

[0019] The housing 10 is used to support the various functional modules described above. The housing 10 is provided with a plurality of mounting posts 11. These mounting posts 11 are used to mount the power board 50 and the drive control board 70. The housing 10 is used to support the various functional modules described above. Therefore, the housing 10 is provided with various functional structures, such as screws, bolts, and mounting slots, to facilitate the installation and assembly of the functional modules. These structures can be configured according to actual needs and will not be described in detail here.

[0020] The water channel assembly 20 includes a water channel 21 arranged on the shell 10, a mounting port 22 connected to the water channel 21, an inlet 23 connected to the water channel 21, a first outlet 24 connected to the water channel 21, a second outlet 25 connected to the water channel 21, a water inlet pipe 26 arranged on the inlet 23, and a blocking block 27 detachably arranged on the first outlet 24 or the second outlet 25.

[0021] The mounting opening 22 is opened on the end surface of the housing 10 facing the power module 30 and the power module 30 is arranged therein, so that the heat dissipation column of the power module 30 is immersed in the water channel 21 through the mounting opening 22, and the power module 30 is heat-exchanged by the coolant flowing in the water channel 21.

[0022] The inlet 23 and the first outlet 24 are located on the end face of the housing 10 away from the power module 30 and communicate with the water channel 21. The inlet pipe 26 connects to an external coolant delivery device, allowing coolant to be delivered from the inlet 23 into the water channel 21 through the inlet pipe 26 and out through the first outlet 24 or the second outlet 25 as needed. The inlet 23, the first outlet 24, and the second outlet 25 are located on opposite sides of the housing 10. The second outlet 25 is located on a connecting surface at the edge of the housing 10 and communicates with the water channel 21. In actual use, the housing 10 is mounted on an external chassis. The second outlet 25, located at the edge of the housing 10, can directly communicate with the corresponding water channel of the external chassis after installation, eliminating the need for connecting via water pipes and reducing space usage. Furthermore, the placement of the first and second outlets 24, 25 at the bottom of the housing 10 reduces floor space. Compared to solutions with inlets and outlets located on both sides of the housing 10, water pipes connected to the inlets and outlets would be inserted from both sides, resulting in the water pipes on both sides taking up space. The blocking block 27 is used to block the first outlet 24 or the second outlet 25 or to remove the blocking block. Water can be discharged from the bottom or the top or both the first outlet 24 and the second outlet 25 at the same time according to needs, thereby improving applicability.

[0023] The power module 30 is mounted within the housing 10 via fasteners. The power module 30 includes multiple input terminals, output terminals, a chip, heat sinks, and signal pins to implement its basic functions. The power module 30 is an electronic component that integrates multiple functions, primarily used to process and control electrical power and perform high-voltage, high-current conversion tasks. This is currently available and will not be further described.

[0024] The filter 40 is connected to an external input power supply and is used to filter out high-frequency noise and ripples in the input power supply to ensure a stable input voltage.

[0025] The power board 50 is mounted on the mounting posts 11 by inserting connecting posts 12. The connecting posts 12 are used to insert fasteners, which will be described in detail below in conjunction with the drive control board 70. Fasteners are connected to the filter 40 and the input terminals of the power module 30 on both sides of the power board 50, respectively, to convert the input high-voltage DC into low-voltage DC for input to the power module 30 for power supply.

[0026] The capacitor assembly 60 includes a plurality of film capacitors 61 disposed on the power board 50 , a plurality of X capacitors 62 disposed on the power board 50 , and a plurality of Y capacitors 63 disposed on the power board 50 .

[0027] Multiple thin-film capacitors 61 are disposed on the end surface of the power board 50 facing the housing 10. The thin-film capacitors 61 are used to cooperate with the filter 40 to smooth the DC voltage, filter out high-frequency ripple and noise, and ensure stable input voltage for the power device. Multiple thin-film capacitors 61 are spaced apart. Using multiple capacitors connected in parallel, compared to a single integrated capacitor, results in more even heat distribution and lower single-point temperatures due to current sharing. Furthermore, the spacing between the multiple thin-film capacitors 61 creates gaps between them, ensuring space for natural convection and further improving heat dissipation. The X capacitors 62 are connected to the positive and negative terminals of the power supply and are used to eliminate differential-mode interference. The Y capacitors are connected between the positive or negative terminals of the power supply and the ground line to eliminate common-mode interference. The X and Y capacitors suppress differential-mode and common-mode interference from the power supply, protecting other components in the circuit from interference and thereby improving circuit stability and reliability. The X and Y capacitors 62 and 63 are disposed on the end surface of the power board 50 facing away from the housing 10, ensuring rational space allocation and improving area utilization. Placing the X capacitor 62 and the Y capacitor 63 near the filter 40 shortens the noise current path and prevents the introduction of parasitic inductance from long wiring. Mounting the film capacitor 61 on the underside of the power board 50, while placing the X capacitor 62 and the Y capacitor 63 on the upper side of the power board 50, creates vertical spatial isolation through the power board 50, preventing coupling between the electric fields of different capacitors.

[0028] The drive control board 70 is mounted on the mounting posts 11 and the connecting posts 12 via fasteners. To save space and reduce horizontal area, the drive control board 70 is positioned above the power module 30 and the power board 50. However, since the mounting posts 11 on the power board 50 are already used to mount the power board 50, some fasteners are positioned on the connecting posts 12, while others are positioned on the mounting posts 11. This allows the connecting posts 12 to both secure the power board 50 to the mounting posts 11 and support the fasteners used to secure the drive control board 70, achieving layered stacking. The signal pins of the power module 30 are inserted into the drive control board 70 to connect the power module's signal portion. The drive control board 70 integrates the drive circuit and control circuit, serving as the control center for the entire inverter brick and responsible for receiving, processing, and issuing control signals. The integration of both the drive circuit and the control circuit eliminates the need for multiple circuit boards for connection. Drive and control signals are transmitted within the same board, reducing parasitic inductance and electromagnetic interference introduced by long-distance wiring and improving signal integrity. After integration, there is no need for a connector between the driver board and the control board, which simplifies the overall design and saves space.

[0029] A plurality of maintenance holes 71 are provided on the drive control board 70. The positions of the maintenance holes 71 are coaxially arranged with the connection points between the power module 30 and the housing 10 and the connection points between the power module 30 and the power board 50, and the positions correspond to each other. Therefore, when performing maintenance or checking whether the fasteners of the connecting parts are loose due to long-term use, the fasteners can be tightened directly through the maintenance holes 71 without removing the drive control board 70.

[0030] Compared with the prior art, the inlet 23 and the first outlet 24 of the inverter provided by the present invention are provided on the end face of the housing 10 away from the power module 30 and are connected to the water channel 21. The second outlet 25 is provided on the connection surface at the edge of the housing 10 and is connected to the water channel 21. The coolant is transported from the inlet 23 into the water channel 21 through the water inlet pipe 26. By providing a dual outlet and the removable blocking block 27, the coolant can be discharged from the bottom or side according to the installation environment. When the inverter is installed in the chassis, the second outlet 25 can be directly connected to the built-in water channel of the chassis, reducing the pipe switching links. The thin film capacitor 61 is provided on the lower side of the power board 50, while the X capacitor 62 and the Y capacitor 63 are provided on the upper side of the power board 50. This layout can form a spatial isolation in the vertical direction through the power board 50, which can avoid the mutual coupling of the electric fields of different capacitors. The drive control board 70 is provided with a maintenance hole 71 axially aligned with the connection point of the power module 30, so that the fasteners of the power module connection point can be maintained directly through the hole without disassembling the control board, thereby shortening on-site maintenance time.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements or improvements within the spirit of the present invention are included in the scope of the claims of the present invention.

Claims

1. An inverter, characterized in that: The inverter includes a shell, a water channel component arranged on the shell, a power module arranged on the shell, a filter arranged on the shell, a power supply board arranged on the shell, a capacitor component arranged on the power supply board, and a drive control board arranged on the shell, the installation port is opened on the end surface of the shell facing the power module, the water channel component includes a water channel arranged on the shell, a installation port connected to the water channel, an inlet connected to the water channel, a first outlet connected to the water channel, a second outlet connected to the water channel, a water inlet pipe arranged on the inlet, and a blocking block detachably arranged on the first outlet or the second outlet, the coolant is transported from the inlet to the water channel through the water inlet pipe, the inlet and the first outlet are opened on the end surface of the shell away from the power module and are connected to the water channel, the second outlet is arranged on the connecting surface of the edge of the shell and is connected to the water channel, the inlet and the first outlet are connected 1. The second outlet is located on opposite sides of the shell, and the two sides of the power board are respectively connected to the input terminals of the filter and the power module. The capacitor assembly includes multiple thin film capacitors arranged on the power board, multiple X capacitors arranged on the power board, and multiple Y capacitors arranged on the power board. The multiple thin film capacitors are arranged at intervals, and the X capacitors and the Y capacitors are arranged on the end surface of the power board away from the shell and close to the filter. The multiple thin film capacitors are arranged on the end surface of the power board facing the shell, and the X capacitors and the Y capacitors are arranged on the end surface of the power board away from the shell, so that the thin film capacitors are mounted on the lower side of the power board, and the X capacitors and the Y capacitors are arranged on the upper side of the power board. The drive control board is integrated with a drive circuit and a control circuit. The drive control board is provided with multiple maintenance holes. The positions of the maintenance holes are coaxial with the connection points between the power module and the shell and the connection points between the power module and the power board, and the positions correspond to each other.

2. The inverter according to claim 1, wherein: The housing is provided with a plurality of mounting posts, the power board is arranged on the mounting posts by inserting connecting posts, and the drive control board is arranged on the mounting posts and the connecting posts by fasteners.

3. The inverter according to claim 1, wherein: The heat dissipation column of the power module is immersed in the water channel through the installation opening.

4. The inverter according to claim 1, wherein: The signal pin of the power module is inserted into the drive control board.

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