Inverter

Abstract

The invention relates to the technical field of inverters, in particular to an inverter. The inverter comprises a shell, a water channel assembly, a power module, a filter, a power panel, a capacitor assembly and a driving control panel. The water channel assembly comprises a water channel, an inlet, a first outlet and a second outlet. And the second outlet is formed in the connecting surface of the edge of the shell and is communicated with the water channel. By arranging the double outlets and the detachable blocking block, the bottom or lateral water outlet mode can be selected according to the installation environment, the second outlet can be directly in butt joint with a built-in water channel of the case, and the pipeline switching link is reduced. The capacitor assembly comprises a thin-film capacitor, an X capacitor and a Y capacitor. Compared with an integrated capacitor, the plurality of capacitors are connected in parallel, so that the heat distribution is more uniform and the temperature of a single point is lower due to uniform current distribution. The driving control panel is provided with a maintenance hole axially aligned with a power module connection point, so that a fastener of the connection point is directly maintained through the hole site, and the control panel does not need to be disassembled.

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 power generation technology, electric vehicles and energy storage systems, the inverter, as the core device of energy conversion, has increasingly higher requirements for integration, power density and reliability. Traditional inverter devices mostly adopt a split structure design, distributing subsystems such as power modules, filter units, and control circuits and connecting them through cables, resulting in a large overall volume and complex assembly process. Especially in high-power application scenarios, the mechanical stacking of multiple components will significantly increase the parasitic inductance and affect the quality of high-frequency signal transmission. At the same time, most of the existing technologies use integrated capacitor components, which are prone to local overheating. The power devices in the existing technology use independent air cooling or single-sided liquid cooling structures for heat dissipation. Generally, the coolant enters from one end and flows out from the outlet at the other end. However, after the coolant flows out from the outlet, it needs to be transferred to other devices in the car that need to be cooled for further cooling, which increases the complexity of assembly and space occupancy. In addition, the maintenance interface design of the existing inverter module is insufficient, and the multi-layer structure needs to be disassembled when inspecting the fasteners, which greatly reduces the efficiency of on-site maintenance. Summary of the invention

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

[0004] An inverter, the inverter comprises a housing, a water channel assembly arranged on the housing, a power module arranged on the housing, a filter arranged on the housing, a power board arranged on the housing, a capacitor assembly arranged on the power board, and a drive control board arranged on the housing. The installation port is provided on the end surface of the housing facing the power module. The water channel assembly comprises a water channel arranged on the housing, a installation port 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 provided on the end surface of the housing 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 housing and is connected to the water channel, and the inlet and the first and second outlets are respectively located on opposite sides of the housing. The two sides of the power board are respectively connected to the input terminals of the filter and the power module. The capacitor assembly comprises a plurality of film capacitors arranged on the power board, a plurality of X capacitors arranged on the power board, and a plurality of Y capacitors arranged on the power 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 multiple maintenance holes are arranged on the drive control board. The positions of the maintenance holes are coaxially arranged 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 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.

[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, a 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 face of the edge of the shell and is connected to the water channel, and the coolant is transported into the water channel from the inlet through the water inlet pipe. By providing a double outlet and a detachable blocking block, the coolant can select a bottom or side outlet mode according to the installation environment. When the inverter is installed in the chassis, the second outlet can directly connect to the built-in water channel of the chassis to reduce the pipeline switching link. The film capacitor is provided on the lower side of the power board, and 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, and 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 directly maintained through the hole position without disassembling the control board, and the on-site maintenance time is shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic structural diagram of an inverter provided by the present invention.

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

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

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

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

[0016] Explanation of the reference numerals: housing 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 specific embodiments of the present invention are further described in detail below. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

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

[0019] The housing 10 is used to carry the above-mentioned functional modules. A plurality of mounting posts 11 are provided on the housing 10. The mounting posts 11 are used to set the power board 50 and the drive control board 70. The housing 10 is used to carry the above-mentioned functional modules, so the housing 10 is provided with a variety of functional structures, such as screws, bolts, mounting grooves, etc., to complete the installation and assembly of the above-mentioned functional modules, which can be provided according to actual needs and will not be described in detail one by one 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 installation 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 installation 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 provided on the end surface of the housing 10 away from the power module 30 and are connected to the water channel 21. The water inlet pipe 26 is connected to an external coolant delivery device, and the coolant is delivered from the inlet 23 to the water channel 21 through the water inlet pipe 26, and flows out from the first outlet 24 or the second outlet 25 as needed. The inlet 23 and the first outlet 24 and the second outlet 25 are respectively located on opposite sides of the housing 10. The second outlet 25 is arranged on the connection surface of the edge of the housing 10 and is connected to the water channel 21. When the housing 10 is actually used, the housing 10 will be arranged on an external chassis. The second outlet 25 is located on the edge of the housing 10 and can be directly connected to the water channel corresponding to the external chassis after the housing 10 is installed, thereby avoiding the need for transfer through water pipes and reducing space occupation. At the same time, the first outlet 24 and the second outlet 25 are arranged at the bottom of the housing 10 to reduce the floor space. Compared with the solution in which the inlet and outlet are located on both sides of the housing 10, the water pipes connected to the inlet and outlet will be inserted from both sides, resulting in the water pipes on both sides occupying space. The blocking block 27 is used to block the first outlet 24 or the second outlet 25 or to remove it without blocking. According to the needs, water can be discharged from the bottom or the top or the first outlet 24 and the second outlet 25 can be discharged at the same time to improve the applicability.

[0023] The power module 30 is arranged in the housing 10 by fasteners, and the power module 30 has a plurality of input terminals, output terminals, chips, heat dissipation columns, and signal pins, etc., to realize the basic functions of the power module. The power module 30 is an electronic component integrating multiple functions, mainly used for processing and controlling electric power and undertaking high voltage and high current conversion tasks, which should be the prior art and will not be described in detail here.

[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 arranged on the mounting column 11 by inserting the connecting column 12, and the connecting column 12 is used to insert the fastener, which will be described in detail below in conjunction with the drive control board 70. The two sides of the power board 50 are connected to the input terminals of the filter 40 and the power module 30 by fasteners, so as to convert the input high-voltage DC into a low-voltage DC 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] A plurality of the film capacitors 61 are arranged on the end surface of the power board 50 facing the housing 10. The film capacitors 61 are used to cooperate with the filter 40 to smooth the DC voltage, filter out high-frequency ripples and noise, and ensure the input voltage of the power device is stable. The plurality of film capacitors 61 are arranged at intervals, and the use of multiple capacitors connected in parallel is compared with an integrated capacitor. Due to the current sharing, the heat distribution is more uniform and the single-point temperature is lower. At the same time, due to the intervals between the plurality of film capacitors 61, there are gaps between the plurality of film capacitors 61, ensuring the space for natural convection, which can further improve the heat dissipation. The X capacitor 62 is connected to the positive and negative ends of the power supply and is used to eliminate differential mode interference. The Y capacitor is connected between the positive or negative pole of the power supply and the ground wire to eliminate common mode interference. The X capacitor and the Y capacitor suppress the differential mode interference and common mode interference of the power supply, protect other components in the circuit from interference, thereby improving the stability and reliability of the circuit. The X capacitor 62 and the Y capacitor 63 are arranged on the end surface of the power board 50 away from the housing 10, thereby ensuring the rationality of space allocation and improving the area utilization. The X capacitor 62 and the Y capacitor 63 are arranged close to the filter 40, which can shorten the noise current path and avoid the parasitic inductance introduced by long-distance routing. The film capacitor 61 is mounted on the lower side of the power board 50, and the X capacitor 62 and the Y capacitor 63 are arranged 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.

[0028] The drive control board 70 is arranged on the mounting column 11 and the connecting column 12 by fasteners. Since the drive control board 70 is arranged above the power module 30 and the power board 50 in order to save space and reduce the horizontal area, but since the mounting column 11 at the power board 50 has been used to set the power board 50, a part of the fasteners are arranged on the connecting column 12, and the other part of the fasteners are arranged on the mounting column 11, so that the connecting column 12 can not only fix the power board 50 on the mounting column 11, but also carry the fasteners used to fix the drive control board 70, so as to achieve layered stacking. The signal pin of the power module 30 is inserted on the drive control board 70 to realize the connection of the signal part of the power module. The drive circuit and the control circuit are integrated on the drive control board 70, which serves as the control center of the entire inverter brick and is responsible for receiving, processing and sending control signals. At the same time, the drive circuit and the control circuit are integrated, and there is no need for multiple circuit boards to be connected. The drive signal and the control signal are transmitted in the same board, reducing the parasitic inductance and electromagnetic interference introduced by long-distance routing, 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] The drive control board 70 is provided with a plurality of maintenance holes 71, and 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, so that 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, and the operation can be performed 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 face of the edge of the housing 10 and is connected to the water channel 21, and the coolant is transported into the water channel 21 from the inlet 23 through the water inlet pipe 26. By providing a double outlet and a detachable blocking block 27, the coolant can select a bottom or side water outlet mode according to the installation environment. When the inverter is installed in the chassis, the second outlet 25 can directly connect to the built-in water channel of the chassis to reduce the pipeline switching link. The film capacitor 61 is provided on the lower side of the power board 50, and 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, and 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 connection point of the power module can be directly maintained through the hole without disassembling the control board, thereby shortening the on-site maintenance time.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention is 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 board arranged on the shell, a capacitor component arranged on the power board, and a drive control board arranged on the shell. The water channel component includes a water channel arranged on the shell, a mounting port 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 mounting port is opened on the end surface of the shell facing the power module, and 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 connection surface of the edge of the shell and is communicated with the water channel. The inlet and the first and second outlets are respectively located on opposite sides of the shell. 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 a plurality of film capacitors arranged on the power board, a plurality of X capacitors arranged on the power board, and a plurality of Y capacitors arranged on the power board. The plurality of film capacitors are arranged at intervals. The drive control board is integrated with a drive circuit and a control circuit. The drive control board is provided with a plurality of maintenance holes. The positions of the maintenance holes are coaxially arranged 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, characterized in that: The shell 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, characterized in that: 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.

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

5. The inverter according to claim 1, characterized in that: The signal pin of the power module is inserted into the drive control board.

6. The inverter according to claim 1, characterized in that: 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. The coolant is transported from the inlet into the water channel through the water inlet pipe.

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