A half-bottom shell type drive motor controller

Abstract

The utility model relates to a kind of half bottom shell type driving motor controller, including the driving control board and lower bottom shell assembly formed fanbeli type inverted triangle cavity;Lower bottom shell assembly is equipped with shielding wall;Inverted triangle cavity installs current sensor, IGBT module, three-phase support, heat dissipation bottom plate, film capacitor and pre-filter component;Driving control board is fixed on IGBT module, current sensor passes through IGBT module and is fixed on driving control board, IGBT module is installed on one side of heat dissipation bottom plate, three-phase support is installed on lower bottom shell assembly, film capacitor and pre-filter component are all installed on the other side of heat dissipation bottom plate, pre-filter component is located film capacitor side.Compared with prior art, the utility model has the whole fanbeli type inverted triangle, can be adsorbed and installed on motor or reducer shell, small in space volume, integrated structure is simple;Shielding wall realizes electromagnetic shielding isolation between different devices, electromagnetic noise suppression performance is high, and the advantages such as anti-interference ability is strong.

Description

Technical Field

[0001] This utility model relates to motor controllers, and more particularly to a semi-bottom-shell type drive motor controller. Background Technology

[0002] As new energy vehicles develop towards higher integration, higher power density, and higher reliability, the motor controller, as the core unit of the power system, directly affects the vehicle's power output, energy consumption, and operational stability due to its structure, heat dissipation, and electromagnetic compatibility (EMC) performance. It is currently a key area of ​​technological research and development.

[0003] Existing technologies have significant shortcomings: structurally, such as... Figure 1 As shown, most controllers adopt an independent cabinet design, which requires additional installation of support legs and assembly with motors and reducers, occupying a large space and with a complex process; some integration solutions are still based on traditional rectangular cabinets, which do not fully adapt to the space shape of the power compartment, resulting in low integration simplicity and low space utilization, thus restricting the improvement of the integration level of the power system.

[0004] In terms of heat dissipation, such as Figure 2 and Figure 3 As shown, existing solutions mostly use a single heat dissipation channel, which centrally arranges heat-generating components such as IGBT modules and film capacitors, resulting in significant thermal interference between components. Film capacitors are prone to performance degradation when exposed to the high-temperature environment of IGBTs for a long time, and IGBT modules are also prone to overheating and failure due to untimely heat dissipation. It is difficult to balance heat dissipation efficiency and component stability.

[0005] In terms of EMC performance, such as Figure 4 As shown, controllers typically only have a single filter component at the high-voltage input or in front of the IGBT, resulting in an incomplete filtering path. Conducted and radiated interference is easily generated during high-voltage signal transmission, causing conflicts with vehicle radar, central control, and other electronic components. This makes it difficult to meet stringent vehicle electromagnetic compatibility standards and affects the stability of the entire vehicle's electronic system.

[0006] A search revealed that CN108401405B, an authorized publication number, discloses a water-cooled motor controller. Specifically, it discloses a controller housing containing, from bottom to top, a capacitor, a water-cooling plate, and a power module. The power module is fixedly connected to the water-cooling plate, which has cooling medium channels on the side facing the power module. The side of the cooling medium channels on the water-cooling plate facing away from the power module exchanges heat with the capacitors through an insulating and thermally conductive material. The water-cooling plate and the controller housing are fixedly connected, with a cooling medium passage between them. The cooling medium flows into the controller housing, exchanges heat with the water-cooling plate, and then flows out of the controller housing. However, the EMC performance of this prior art still needs improvement.

[0007] In summary, the technical problem that needs to be solved is how to design a motor controller with high integration and good EMC performance. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings of the existing technology, such as low integration and poor EMC performance, by providing a semi-bottom-shell drive motor controller.

[0009] The objective of this utility model can be achieved through the following technical solutions.

[0010] According to one aspect of the present invention, a semi-bottom shell type drive motor controller is provided, including a drive control board and a bottom shell assembly, wherein the drive control board and the bottom shell assembly form a scallop-shaped inverted triangular cavity, and the drive control board has a planar structure; the bottom shell assembly is provided with a shielding wall separating different devices. A current sensor, IGBT module, three-phase bracket, heat sink, thin-film capacitor, and pre-filter assembly are installed inside the inverted triangular cavity. The drive control board is fixed on the IGBT module, and the current sensor passes through the IGBT module and is fixed on the drive control board. The IGBT module is mounted on the side of the heat sink near the drive control board. The three-phase bracket is mounted on the lower bottom shell assembly. The thin-film capacitor and the pre-filter assembly are both mounted on the side of the heat sink near the lower bottom shell assembly, with the pre-filter assembly located on the side of the thin-film capacitor.

[0011] As a preferred technical solution, the lower shell assembly includes a lower shell and a high-pressure connector and a low-pressure connector installed inside the lower shell. The lower shell is provided with a water pipe joint and mounting holes. The drive control board is installed on the low-pressure connector.

[0012] As a preferred technical solution, the shielding wall includes a connector shielding wall, a DC shielding wall, and an AC shielding wall. The connector shielding wall is arranged around the low-voltage connector. The DC shielding wall is located between the pre-filter assembly and the three-phase output interface of the three-phase bracket. The DC shielding wall is located between the three-phase output interface of the three-phase bracket and the high-voltage connector.

[0013] As a preferred technical solution, the lower shell assembly includes a lower shell, the side shape of the thin film capacitor is the same as the side shape of the lower shell, and thermally conductive pads are sandwiched between the two sides of the thin film capacitor and the lower shell.

[0014] As a preferred technical solution, the side of the heat dissipation base plate near the drive control board is divided into a heat dissipation functional area and a shielding functional area. The heat dissipation functional area is provided with multiple heat dissipation water tanks, and an IGBT module is fixed on each heat dissipation water tank.

[0015] As a preferred technical solution, the heat dissipation base plate is provided with water channels on one side near the lower housing assembly, and water channel cover plates are welded on the water channels. The water channel cover plates are provided with water inlets and water outlets at both ends. The heat dissipation water tank is provided with strip-shaped slots at both ends, and the strip-shaped slots are connected to the water channels.

[0016] As a preferred technical solution, the waterway has a diversion channel that divides the waterway into multiple areas. Each area includes one strip-shaped opening of a heat dissipation water tank, and one area also includes another strip-shaped opening of all heat dissipation water tanks and an outlet. The diversion channel is funnel-shaped, with a smaller end near the inlet and a larger end near the outlet.

[0017] As a preferred technical solution, the pre-filter assembly includes a primary magnetic ring, a DC busbar, a filter board, and a filter bracket. The DC busbar passes through the primary magnetic ring, and a conversion terminal is welded onto the DC busbar and fixed in the filter bracket. One end of the DC busbar with the conversion terminal is provided with a laser welding area, which is electrically connected to the input copper busbar of the film capacitor. The filter board is fixed on the filter bracket and connected to the conversion terminal.

[0018] As a preferred technical solution, the input terminal of the thin-film capacitor integrates a potted mid-section filter component, and the output terminal integrates a potted end-section filter capacitor.

[0019] As a preferred technical solution, the input terminal of the thin-film capacitor is connected to a capacitor copper busbar, the capacitor copper busbar passes through a secondary magnetic ring, and a secondary Y capacitor is fixed on one side of the secondary magnetic ring; the output terminal of the thin-film capacitor is provided with multiple sets of tertiary Y capacitors, the number of which is the same as the number of IGBT modules.

[0020] Compared with the prior art, the present invention has the following beneficial effects.

[0021] 1) The motor controller of this utility model is in the shape of a scalloped inverted triangle. It can be adsorbed and installed on the housing of the motor or reducer of the electric drive system through the plane where the drive control board is located. It has the characteristics of small space volume and simple integrated structure. The bottom shell assembly is equipped with a shielding wall to separate different devices, realizing electromagnetic shielding isolation between different devices, avoiding electromagnetic radiation interference, and has the characteristics of high electromagnetic noise suppression performance, strong anti-interference ability, and good EMC performance.

[0022] 2) The shielding wall of this utility model includes a connector shielding wall, a DC shielding wall, and an AC shielding wall; the connector shielding wall forms a covering shield for the low-voltage connector, avoiding electromagnetic interference from the AC power in the high-voltage three-phase support; the DC shielding wall realizes electromagnetic shielding between the DC high-voltage connector and the AC three-phase output interface; the AC shielding wall realizes electromagnetic shielding between the pre-filter component and the AC output interface, and between the pre-filter and the drive circuit board, avoiding radiation interference.

[0023] 3) The side shape of the thin film capacitor of this utility model is the same as the side shape of the bottom shell. The upper surface of the thin film capacitor is attached to the heat dissipation base plate for cooling, and the side is attached to the metal side of the bottom shell assembly through the heat-conducting pad for heat dissipation, thereby realizing three-dimensional heat dissipation of the outer surface of the thin film capacitor.

[0024] 4) This utility model's heat dissipation base plate and lower shell assembly form a lower-level enclosed capacitor mounting space. An independent parallel heat dissipation water tank is arranged on the upper layer of the heat dissipation base plate for IGBT module cooling, featuring excellent heat dissipation performance and minimal thermal interference between the film capacitors and IGBT modules. The heat dissipation base plate has water channels with branching channels. After the coolant enters the heat dissipation base plate from the inlet, it is divided into multiple channels flowing to multiple different IGBT modules, achieving parallel cooling of different IGBT modules and avoiding turbulent interference and uneven heat dissipation at the inlets of different IGBT modules. The outlet of the heat dissipation water channel presents a funnel-shaped confluence channel, which gradually widens as the module outlet position increases, preventing increased flow resistance caused by rapid water flow at the outlet.

[0025] 5) This utility model has a pre-filter component, a middle filter component at the input end of the film capacitor, and a terminal filter capacitor at the output end, realizing the filtering arrangement of the entire path from the high voltage plug-in to the IGBT module; it has the characteristics of high electromagnetic noise suppression performance, strong anti-interference ability, and good EMC performance. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a controller structure with an independent enclosure in the prior art.

[0027] Figure 2 This is a schematic diagram of the first structure of a controller with a single heat dissipation channel in the prior art.

[0028] Figure 3 This is a schematic diagram of the second structure of a controller with a single heat dissipation channel in the prior art.

[0029] Figure 4 This is a schematic diagram of a controller structure with only a single filter component in the prior art.

[0030] Figure 5 This is a schematic diagram of the overall structure of a semi-bottom shell type drive motor controller according to this utility model.

[0031] Figure 6 This is a right view of a semi-bottom shell type drive motor controller according to this utility model.

[0032] Figure 7 This is an exploded view of a semi-bottom shell type drive motor controller according to this utility model.

[0033] Figure 8 This is a left view of a semi-bottom shell type drive motor controller according to this utility model.

[0034] Figure 9 This is a schematic diagram of the internal stacked layout of a semi-bottom shell type drive motor controller according to this utility model.

[0035] Figure 10 This is a top view of the heat dissipation base plate of this utility model.

[0036] Figure 11 This is a bottom view of the heat dissipation base plate of this utility model.

[0037] Figure 12 This is a layout diagram of the heat dissipation water channel of this utility model.

[0038] Figure 13 This is a schematic diagram showing the installation positions of the thin-film capacitor and the pre-filter assembly of this utility model.

[0039] Figure 14 This is a schematic diagram of the pre-filter component of this utility model.

[0040] Figure 15 This is an exploded view of the pre-filter component of this utility model.

[0041] Figure 16 This is a schematic diagram of the thin-film capacitor structure of this utility model.

[0042] Figure 17 This is a side view of the thin-film capacitor of this utility model.

[0043] Figure 18 This is a layout diagram of the shielding wall of this utility model.

[0044] Figure 19 This is a partial enlarged view of the connector shielding wall of this utility model.

[0045] Figure 20 This is a partial enlarged view of the DC shielding wall and AC shielding wall of this utility model.

[0046] Figure 21 This is a schematic diagram of the shielding structure of the low-voltage connector of this utility model.

[0047] Figure 22 This is a schematic diagram of the structure of this utility model excluding the drive control board.

[0048] Figure 23 This is a schematic diagram of the first shielding structure of the pre-filter component of this utility model.

[0049] Figure 24 This is a schematic diagram of the second shielding structure of the pre-filter component of this utility model.

[0050] The numbers in the diagram are as follows: 1. Drive control board; 2. Lower housing assembly; 20. Lower housing; 201. Connector shielding wall; 202. DC shielding wall; 203. AC shielding wall; 204. Water pipe connector; 205. Mounting hole; 21. High-voltage connector; 22. Low-voltage connector; 3. Current sensor; 4. IGBT module; 5. Three-phase bracket; 6. Heat sink base plate; 60. Heat dissipation functional area; 600. Heat dissipation water tank; 6000. Strip-shaped slot; 601. Water channel cover; 602. Water inlet; 603. Water outlet; 604. Diverter channel; 605. Combination area; 61. Shielding functional area; 7. Film capacitor; 70. Secondary magnetic ring; 71. Secondary Y capacitor. 72. Three-stage Y capacitor; 73. Output terminal of film capacitor; 8. Pre-filter assembly; 80. First-stage magnetic ring; 81. DC busbar; 810. Laser welding area; 82. Filter board; 83. Filter bracket; 84. Adapter terminal; 901. Existing first film capacitor; 902. Existing filter; 903. Existing enclosure; 904. Existing mounting feet; 905. Existing first IGBT module; 906. Existing second film capacitor; 907. Existing inlet; 908. Existing second IGBT module; 909. Existing outlet; 910. Existing water tank; 911. Existing DC busbar; 912. Existing filter bracket; 913. Existing magnetic ring. Detailed Implementation

[0051] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0052] like Figure 5 and Figure 6 As shown, this utility model provides a semi-bottom shell type drive motor controller, which is shaped like an inverted triangle.

[0053] like Figure 7As shown, a semi-bottom shell type drive motor controller, from top to bottom, consists of a drive control board 1, a current sensor 3, an IGBT module 4, a three-phase bracket 5, a heat dissipation base plate 6, a thin-film capacitor 7, a pre-filter, and a lower bottom shell assembly 2. The drive control board 1 has a planar structure, and the drive control board 1 and the lower bottom shell assembly 2 form a scallop-shaped inverted triangular cavity. In the inverted triangular cavity, the thin-film capacitor 7 is installed on the lower bottom surface of the heat dissipation base plate 6, and the pre-filter assembly 8 is installed on one side of the thin-film capacitor 7 and fixed to the lower bottom surface of the heat dissipation base plate 6. The IGBT module 4 is installed on the upper surface of the heat dissipation base plate 6, and the drive control board 1 is fixed above the IGBT module 4. The current sensor 3 passes through the AC terminal of the IGBT module 4 and is fixed to the drive control board 1.

[0054] The lower housing assembly 2 includes a lower housing 20, a high-pressure connector 21, and a low-pressure connector 22. A water pipe connector 204 is provided on the lower housing 20, and mounting holes 205 are provided around the edge of the lower housing 20. Figure 8 and Figure 9 As shown, the lower housing assembly 2 has an inverted triangular cavity structure; the three-phase bracket 5 is installed on the inner edge of the lower housing assembly 2; the heat dissipation base plate 6, which integrates the IGBT module 4, the drive control board 1 and the thin film capacitor 7, is fixed in the lower housing 20; the side of the thin film capacitor 7 has an inverted triangular structure, and the side shape of the thin film capacitor 7 is the same as the side shape of the lower housing 20. The lower housing assembly 2 and the heat dissipation base plate 6 form a closed capacitor mounting space. The upper surface of the thin film capacitor 7 is attached to the heat dissipation base plate 6 for cooling. The two sides of the triangular area of ​​the thin film capacitor 7 are attached to the metal side of the lower housing assembly 2 for heat dissipation through thermal pads, thereby achieving three-dimensional heat dissipation of the outer surface of the thin film capacitor 7.

[0055] like Figures 10-12As shown, the heat dissipation base plate 6 is a rectangular aluminum structural component. The right side of one side of the heat dissipation plate is the heat dissipation functional area 60, and the left side is the shielding functional area 61. The heat dissipation functional area 60 is provided with three heat dissipation water tanks 600 (the number can be arbitrary, as long as it is the same as the number of IGBT modules 4), which are used to fix the three IGBT modules 4. The two ends of the heat dissipation water tanks 600 are respectively provided with strip-shaped slots 6000, which are connected to the water channels on the other side of the heat dissipation base plate 6 to realize the parallel heat dissipation structure of the three IGBT modules 4. The back of the heat dissipation base plate 6 is provided with a strip-shaped water channel cover plate 601, which covers the water channels. The water channel cover plate 601 and the heat dissipation base plate 6 body are sealed by friction stir welding. The two ends of the water channel cover plate 601 are respectively provided with water inlet 602 and water outlet 603. The heat dissipation base plate 6 has a lane-type diversion channel 604 inside, which divides the water channel into multiple areas. Each area includes one strip-shaped slot 6000 of a heat dissipation water tank 600. One area also includes another strip-shaped slot 6000 of all heat dissipation water tanks 600 and an outlet 603. The area near the outlet 603 is a confluence area 605. After the coolant enters the heat dissipation base plate 6 from the inlet 602, it is divided into three channels and flows to three different IGBT modules 4 respectively, realizing parallel cooling of different IGBT modules 4 and avoiding turbulence interference and uneven heat dissipation at the inlets of different IGBT modules 4. The diversion channel 604 is funnel-shaped and gradually widens as it approaches the outlet 603 to avoid the problem of increased flow resistance caused by rapid water flow at the outlet 603.

[0056] like Figure 13 As shown, this utility model includes a pre-filter component 8, a mid-section filter component, and an end filter capacitor; the mid-section filter component and the end filter capacitor are integrated and encapsulated inside a thin-film capacitor 7, the input end of the thin-film capacitor 7 is integrated with the mid-section filter component, and the output end is integrated with the end filter capacitor.

[0057] like Figure 14 and Figure 15 As shown, the pre-filter assembly 8 includes a primary magnetic ring 80, a DC busbar 81, a filter board 82, and a filter bracket 83. The DC busbar 81 passes through the primary magnetic ring 80, and one end is welded with an adapter terminal 84 and fixed in the filter bracket 83. The filter board 82 is fixed above the filter bracket 83 and is electrically connected to the DC busbar 81 through the adapter terminal 84. The end of the DC busbar 81 with the adapter terminal 84 has a laser welding area 810 to achieve electrical connection with the input copper busbar of the film capacitor 7.

[0058] like Figure 16 As shown, at the input terminal of the film capacitor 7, the capacitor copper busbar passes through the secondary magnetic ring 70, and a secondary Y capacitor 71 is fixed to one side of the secondary magnetic ring 70; as Figure 17As shown, the output terminal 73 of the thin film capacitor is equipped with three sets of three-stage Y capacitors 72, which correspond to the three IGBT modules 4 for noise reduction filtering.

[0059] like Figure 18 , Figure 19 and Figure 21 As shown, inside the lower housing 20, a surrounding connector shielding wall 201 is provided around the low-voltage connector 22, and the drive control board 1 is mounted on the low-voltage connector 22. This forms a comprehensive shielding of the low-voltage connector 22, avoiding electromagnetic interference from the AC power in the high-voltage three-phase support 5.

[0060] like Figure 18 , Figure 20 , Figures 22-24 As shown, the lower casing 20 is also equipped with a DC shielding wall 202 and an AC shielding wall 203. The AC shielding wall 203 is located between the pre-filter and the three-phase output interface. After the heat dissipation base plate 6 is installed, it is fixed on the AC shielding wall 203 to achieve electromagnetic shielding between the pre-filter component 8 and the AC output interface, and between the pre-filter and the drive circuit board, so as to avoid radiation interference. The DC shielding wall 202 is located between the high-voltage DC connector and the three-phase output interface to achieve electromagnetic shielding between the DC high-voltage connector 21 and the AC output interface.

[0061] The assembly process of this utility model is as follows: First, assemble the thin-film capacitor 7 and the IGBT module 4; after placing a thermal pad on the surface of the thin-film capacitor 7, fix it to the lower end of the heat sink base plate 6; then, the DC bus 81 passes through the first-stage magnetic ring 80, and the adapter terminal 84 is welded on and fixed in the filter bracket 83. The filter plate 82 is fixed above the filter bracket 83 and electrically connected to the DC bus 81 through the adapter terminal 84; the end of the DC bus 81 has a laser welding area 810 that is laser welded to the input end of the thin-film capacitor 7; next, install the IGBT module 4 on the heat sink 600 above the heat sink base plate 6 to achieve the sealing of the heat sink channel; the three-phase current sensor 3 passes through the output copper busbar of the IGBT module 4.

[0062] Next, install the three-phase bracket 5, which is installed on the inner edge of the lower base assembly 2. Then, attach thermal pads to the side of the inverted triangular lower base 20, and fix the heat dissipation base plate 6, which integrates the IGBT module 4, drive control board 1, and film capacitor 7, into the lower base assembly 2, so that the water inlet 602 and water outlet 603 on the heat dissipation base plate 6 pass through the water pipe connector 204 on the lower base 20. The output terminals of the IGBT module 4 are welded to the laser welding area 810 of the three-phase bracket 5 by laser welding to achieve electrical connection.

[0063] Finally, install the drive control board 1, fix the drive control board 1 directly above the IGBT module 4, and electrically connect the IGBT pins, low voltage connection pins, and three-phase current sensor 3 pins to the drive control board 1 by soldering.

[0064] At this point, the installation of the semi-bottom shell type drive motor controller of this utility model is complete.

[0065] This utility model presents an inverted triangular scallop-like structure. The inverter, mimicking a scallop, is attached to the motor or reducer housing of the electric drive system, featuring a small volume and simple integrated structure. It employs a layered heat dissipation layout, with the heat dissipation base plate 6 and the lower shell assembly 2 forming a lower enclosed capacitor mounting space. An independent parallel cooling water tank 600 is arranged on the upper layer of the heat dissipation base plate 6 for cooling the IGBT module 4, resulting in excellent heat dissipation performance and low thermal interference between the film capacitor 7 and the IGBT module 4. Furthermore, this utility model features a distributed integrated EMC filtering structure. The controller integrates a pre-filter component 8, the film capacitor 7 has a mid-stage filter component at its input, and a final filter capacitor at its output, achieving full-path filtering from the high-voltage plug-in to the IGBT module 4. It features high electromagnetic noise suppression performance, strong anti-interference ability, and excellent EMC performance. The lower shell 20 of this utility model has multiple electromagnetic shielding walls inside, which, together with the shielding functional area 61 on the heat dissipation base plate 6, realize electromagnetic shielding isolation between the pre-filter component 8, the high voltage connector 21, and the three-phase output port, avoiding electromagnetic radiation interference. It features high electromagnetic noise suppression performance, strong anti-interference ability, and excellent EMC performance.

[0066] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A semi-bottom-shell type drive motor controller, characterized in that, It includes a drive control board (1) and a lower shell assembly (2), the drive control board (1) and the lower shell assembly (2) forming a scallop-shaped inverted triangular cavity, the drive control board (1) having a planar structure; the lower shell assembly (2) is provided with a shielding wall separating different devices; A current sensor (3), an IGBT module (4), a three-phase bracket (5), a heat sink (6), a thin-film capacitor (7), and a pre-filter assembly (8) are installed inside the inverted triangular cavity. The drive control board (1) is fixed on the IGBT module (4), the current sensor (3) passes through the IGBT module (4) and is fixed on the drive control board (1), the IGBT module (4) is installed on the side of the heat sink (6) close to the drive control board (1), the three-phase bracket (5) is installed on the lower shell assembly (2), the thin-film capacitor (7) and the pre-filter assembly (8) are both installed on the side of the heat sink (6) close to the lower shell assembly (2), and the pre-filter assembly (8) is located on the side of the thin-film capacitor (7).

2. The semi-bottom shell type drive motor controller according to claim 1, characterized in that, The lower shell assembly (2) includes a lower shell (20) and a high-pressure connector (21) and a low-pressure connector (22) installed in the lower shell (20). The lower shell (20) is provided with a water pipe joint (204) and a mounting hole (205). The drive control board (1) is installed on the low-pressure connector (22).

3. A semi-bottom-shell type drive motor controller according to claim 2, characterized in that, The shielding wall includes a connector shielding wall (201), a DC shielding wall (202), and an AC shielding wall (203). The connector shielding wall (201) is arranged around the low-voltage connector (22). The DC shielding wall (202) is located between the pre-filter assembly (8) and the three-phase output interface of the three-phase bracket (5). The DC shielding wall (202) is located between the three-phase output interface of the three-phase bracket (5) and the high-voltage connector (21).

4. A semi-bottom-shell type drive motor controller according to claim 1, characterized in that, The lower shell assembly (2) includes a lower shell (20), the side shape of the thin film capacitor (7) is the same as the side shape of the lower shell (20), and thermal pads are sandwiched between the two sides of the thin film capacitor (7) and the lower shell (20).

5. A semi-bottom-shell type drive motor controller according to claim 1, characterized in that, The heat dissipation base plate (6) is divided into a heat dissipation functional area (60) and a shielding functional area (61) on the side near the drive control board (1). The heat dissipation functional area (60) is provided with multiple heat dissipation water tanks (600), and an IGBT module (4) is fixed on each heat dissipation water tank (600).

6. A semi-bottom-shell type drive motor controller according to claim 5, characterized in that, The heat dissipation base plate (6) has a water channel on one side near the lower housing assembly. A water channel cover plate (601) is welded on the water channel. The water channel cover plate (601) has an inlet (602) and an outlet (603) at both ends. The heat dissipation water tank (600) has a strip-shaped groove (6000) at both ends, and the strip-shaped groove (6000) is connected to the water channel.

7. A semi-bottom-shell type drive motor controller according to claim 6, characterized in that, The waterway has a diversion channel (604) that divides the waterway into multiple areas. Each area includes one of the strip-shaped slots (6000) of a heat dissipation water tank (600). One area also includes another strip-shaped slot (6000) of all the heat dissipation water tanks (600) and an outlet (603). The diversion channel (604) is funnel-shaped, with a smaller end near the inlet (602) and a larger end near the outlet (603).

8. A semi-bottom-shell type drive motor controller according to claim 1, characterized in that, The pre-filter assembly (8) includes a primary magnetic ring (80), a DC busbar (81), a filter board (82), and a filter bracket (83). The DC busbar (81) passes through the primary magnetic ring (80). A transition terminal (84) is welded onto the DC busbar (81) and fixed in the filter bracket (83). One end of the DC busbar (81) with the transition terminal (84) is provided with a laser welding area (810). The laser welding area (810) is electrically connected to the input copper busbar of the film capacitor (7). The filter board (82) is fixed on the filter bracket (83) and connected to the transition terminal (84).

9. A semi-bottom-shell type drive motor controller according to claim 1, characterized in that, The thin-film capacitor (7) integrates a potted mid-section filter component at the input end and a potted end filter capacitor at the output end.

10. A semi-bottom-shell type drive motor controller according to claim 1, characterized in that, The input terminal of the thin film capacitor (7) is connected to a capacitor copper busbar, which passes through a secondary magnetic ring (70). A secondary Y capacitor (71) is fixed on one side of the secondary magnetic ring (70). The output terminal (73) of the thin film capacitor is provided with multiple sets of tertiary Y capacitors (72), and the number of tertiary Y capacitors (72) is the same as the number of IGBT modules (4).

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