Motor controller

Abstract

The utility model discloses a motor controller which comprises a box body, two covers, a maintenance cover plate and a junction box, the two covers are detachably buckled on the upper portion and the lower portion of the box body, the maintenance cover plate is detachably buckled on the junction box, and the junction box is fastened at the front end of the box body through a fixing piece. The box body provided with the cover and the junction box provided with the maintenance cover plate form a first cavity and a second cavity which are arranged side by side and are respectively closed through a separator, the first cavity is provided with a filtering module, a direct current wire holder and positive and negative pole copper bars, and the filtering module is respectively connected with the junction box, the direct current wire holder and the positive and negative pole copper bars; the direct-current wire holder is connected with the positive and negative copper bars, the second cavity is provided with a three-phase magnetic ring and an alternating-current mounting seat, the three-phase magnetic ring is respectively connected with the junction box and the alternating-current mounting seat, and the alternating-current mounting seat is fixedly provided with a three-phase copper bar.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor controllers, and in particular relates to a motor controller. Background Art

[0002] A motor controller is an electronic device used to control the operation of a motor. It regulates the motor's operating state based on set parameters such as direction, speed, and torque. In electric vehicles, the motor controller is particularly critical. It is responsible for converting the power of the power battery into the energy required to drive the motor, controlling the vehicle's dynamic performance, such as starting, acceleration, and braking. It also recovers energy during braking to improve energy efficiency. With the rapid development of electric new energy vehicles, companies are increasingly demanding more diverse motor controllers.

[0003] The existing motor controllers have the following problems:

[0004] 1. The existing motor controller structure design has the problem of poor compatibility. Each structure design can only be used for a certain car model and cannot adapt to more markets. The current market is developing rapidly and advocating an agile development model. The traditional motor controller structure design cannot meet the diverse needs of the market and cannot develop new products in a short time.

[0005] 2. Existing motor controllers often have a structure that cannot match the entire vehicle or have a single function, which requires the redevelopment of motor controllers to meet new requirements, resulting in high development costs. Utility Model Content

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a motor controller.

[0007] In order to solve the technical problem, the technical solution of the present invention is: a motor controller, comprising a box, a cover, a maintenance cover and a junction box, wherein the cover is two, and the two covers are detachably buckled on the upper and lower sides of the box, respectively, and the maintenance cover is detachably buckled on the junction box, and the junction box is fastened to the front end of the box by a fixing member, and the box on which the cover is installed and the junction box on which the maintenance cover is installed form a first cavity and a second cavity which are arranged side by side and are respectively closed by a separator, and the first cavity is installed with a filter module, a DC terminal block and positive and negative copper bars, the filter module is respectively connected to the junction box, the DC terminal block and the positive and negative copper bars, and the DC terminal block is connected to the positive and negative copper bars, the second cavity is installed with a three-phase magnetic ring and an AC mounting seat, the three-phase magnetic ring is respectively connected to the junction box and the AC mounting seat, and the AC mounting seat is fixedly installed with a three-phase copper bar;

[0008] The upper side of the box body, which is provided with a first cavity and a second cavity, is installed with a power module. The lower side of the box body, which is provided with a first cavity and a second cavity, is installed with a bus capacitor. The input end of the bus capacitor is connected to the positive and negative copper bars, the output end of the bus capacitor is connected to the power module, and the output end of the power module is connected to the three-phase copper bars. The three-phase copper bars on the AC mounting base are connected to the three-phase high-voltage wire harness, and the three-phase high-voltage wire harness is fixed on the junction box.

[0009] Preferably, the filtering module includes a first magnetic ring, a Y capacitor and a second magnetic ring. The first magnetic ring is fixed in the first cavity inside the junction box near the high-voltage wire inlet through a fixing member. The Y capacitor is fixed on the DC terminal block through a fixing member. The Y capacitor forms an electrical loop with the positive and negative copper bars through screws. The second magnetic ring is potted on the DC terminal block, and the DC terminal block is fixed on the box body through a fixing member.

[0010] Preferably, the upper side of the box body, which is provided with a first cavity and a second cavity, further includes a control board and a shielding board. The shielding board is located above the power module and fixedly installed on the box body, and the control board is fixedly installed above the shielding board.

[0011] Preferably, a water nozzle is installed at the middle of each of the two opposite sides of the box body. The water nozzles are symmetrically distributed left and right along the box body, and the water nozzles are installed on both sides of the box body by interference fit. A low-voltage connector is installed at the middle near the top of each of the two opposite sides of the box body. The low-voltage connectors are symmetrically distributed left and right along the box body.

[0012] Preferably, the filtering module and the three-phase magnetic ring are both connected to the junction box inside the junction box; the separator is parallel to the short side of the box body.

[0013] Preferably, the fixing member is a screw, and the separator is a retaining wall.

[0014] Preferably, both the DC terminal block and the AC mounting base are provided with a double-output and double-input structure.

[0015] Preferably, water inlets are provided at the bottom near both sides of the box body. Two water inlets are installed on each side of the box body. The water inlets on each side are symmetrically distributed left and right along the box body with respect to the water inlets on the other side, and the water inlets on the same side are symmetrically distributed on one side of the box body.

[0016] Preferably, one end of the positive and negative copper bars is connected to the high-voltage input wire harness through screws, and the other end of the positive and negative copper bars is connected to the input end of the bus capacitor through screws.

[0017] Preferably, the bus capacitor is fixed to the lower layer of the box body by screws, the output end of the power module is connected to the three-phase copper bus by screws, the cover is fixed to the upper and lower parts of the box body by screws, the control board is installed on the shielding board by screws, the shielding board is installed on the box body by screws, the low-voltage connector is installed on the box body by screws and connected to the control board, the AC mounting seat is installed on the box body by screws, and the three-phase magnetic ring is fixed in the second cavity in the junction box by screws.

[0018] Compared with the prior art, the advantages of the present utility model are as follows:

[0019] (1) The electromagnetic interference protection ability of the present utility model is strong. In the structural design, the filtering module is placed in an independent metal cavity and close to the high-voltage DC inlet. The high-voltage DC input and the three-phase output are respectively arranged in different metal cavities. This structural design can avoid the interference of the three-phase output on the high-voltage DC input. The filtering module is of an LCL structure and is placed in an independent cavity close to the high-voltage DC input interface, which can avoid the secondary interference generated by the high-voltage system inside the controller.

[0020] (2) In the present utility model, a motor controller adopts a completely left-right symmetric design in the structural design and layout of the low-voltage connectors and the water inlet and outlet nozzles that are connected to the whole vehicle. The use of the symmetric structure design can make the motor controller have better compatibility, can meet the installation requirements of more whole vehicles, reduces the development cost and product cost of the controller. The traditional structural design has poor compatibility, and a product can only meet the requirements of one vehicle model, resulting in the need to develop more products and high development costs.

[0021] (3) The motor controller of the present utility model can achieve multiple drive output modes. By changing the structure of the junction box, functions such as single electric control double output mode (when the output current increases and the types of large-current-carrying wire harnesses are few and the cost is high, the double output mode appears), single electric control single output, and double electric control double output can be realized. This structural design not only has a lower cost and shortens the development cycle, but also can match more product requirements to achieve agile development. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an exploded view of a motor controller of the present utility model;

[0023] Figure 2 is the filtering structure of a motor controller of the present utility model;

[0024] Figure 3 is a schematic structural view of the first cavity, the second cavity and the retaining wall of a motor controller of the present utility model;

[0025] Figure 4 is the double-motor controller double-output structure layout of a motor controller of the present utility model;

[0026] Figure 5 This is the dual-output structure layout of a single-motor controller for a motor controller of the present utility model;

[0027] Figure 6 This is the single-output structure layout of a single-motor controller for a motor controller of the present utility model;

[0028] Figure 7 This is a schematic three-dimensional structure diagram of a motor controller of the present utility model;

[0029] Figure 8 This is another perspective three-dimensional structure diagram of a motor controller of the present utility model;

[0030] Figure 9 This is a schematic diagram of the water outlet design of a motor controller of the present utility model;

[0031] Description of reference numerals:

[0032] 1, Junction box; 2, Maintenance cover plate; 3, First magnetic ring; 4, DC terminal block; 5, Positive and negative copper bars; 6, Second magnetic ring; 7, Box body; 8, Three-phase copper bar; 9, Power module; 10, Cover; 11, Control board; 12, Shielding board; 13, Low-voltage connector; 14, Bus capacitor; 15, Water nozzle; 16, AC mounting base; 17, Three-phase magnetic ring; 19, Retaining wall; 20, Water outlet;

[0033] 701, First cavity; 702, Second cavity. Specific embodiments

[0034] The following describes the specific embodiments of the present utility model in conjunction with the embodiments:

[0035] It should be noted that the structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the implementation conditions of the present utility model. Any modification of the structure, change of the ratio relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model.

[0036] In addition, the drawings are only schematic diagrams of the embodiments of the present utility model and are not necessarily drawn to scale. The same reference numerals in the drawings represent the same or similar parts, and thus their repeated descriptions will be omitted. Some of the structure diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0037] Embodiment 1

[0038] As Figure 1 、Figure 3 and Figure 4 As shown in Figure 4 , a motor controller includes a box body 7, a cover 10, a maintenance cover plate 2 and a junction box 1. There are two covers 10, and the two covers 10 are respectively detachably buckled on the upper and lower parts of the box body 7. The maintenance cover plate 2 is detachably buckled on the junction box 1. The junction box 1 is fastened to the front end of the box body 7 through a fixing member. The box body 7 where the cover 10 is installed and the junction box 1 where the maintenance cover plate 2 is installed form a first cavity 701 and a second cavity 702 which are arranged side by side and each is enclosed through a partition member 19. The first cavity 701 is provided with a filtering module, a DC terminal block 4 and positive and negative copper bars 5. The filtering module is respectively connected to the junction box 1, the DC terminal block 4 and the positive and negative copper bars 5. The DC terminal block 4 is connected to the positive and negative copper bars 5. The second cavity 702 is provided with a three-phase magnetic ring 17 and an AC mounting base 16. The three-phase magnetic ring 17 is respectively connected to the junction box 1 and the AC mounting base 16. The AC mounting base 16 is fixedly installed with three-phase copper bars 8;

[0039] On the upper side of the box body 7 where the first cavity 701 and the second cavity 702 are located, a power module 9 is installed. On the lower side of the box body 7 where the first cavity 701 and the second cavity 702 are located, a bus capacitor 14 is installed. The input end of the bus capacitor 14 is connected to the positive and negative copper bars 5. The output end of the bus capacitor 14 is connected to the power module 9. The output end of the power module 9 is connected to the three-phase copper bars 8; The three-phase copper bars 8 on the AC mounting base 16 are connected to three-phase high-voltage wire harnesses, and the three-phase high-voltage wire harnesses are fixed on the junction box 1.

[0040] The maintenance cover plate 2 is used to protect the internal devices of the controller from being damaged and shield the internal and external electromagnetic interference.

[0041] The junction box 1 is used for protection, shielding and installation of high-voltage wire harnesses.

[0042] For the box body 7, the cover 10, the maintenance cover plate 2 and the junction box 1, the sealing between the box body 7 and the junction box 1 is sealed through a sealing ring or sealant.

[0043] Designing the filtering module and the three-phase magnetic ring 17 in the first cavity and the second cavity respectively is beneficial to improving the electromagnetic anti-interference ability. The advantages are as follows:

[0044] This structural design has two independent cavities at the high-voltage inlet and outlet, which is beneficial to avoid interference coupling to the inlet and outlet through the unfiltered structure and disturbing the normal operation of internal or external devices. Moreover, the whole path is from the first cavity to the lower layer of the box body, then to the upper layer of the box body, and then to the second cavity, so that interference cannot be directly coupled at the inlet and outlet, improving the filtering reliability and ensuring the purity of the high-voltage harness filtering. The filtering structure at the high-voltage input port is an LCL (first magnetic ring, Y capacitor, second magnetic ring) filtering module, which filters out the interference in the high-voltage system, prevents the controller from generating interference to the inside and outside during operation, and improves the reliability of the product; it prevents crosstalk between the high-voltage DC and the three-phase output.

[0045] As Figure 2 shown, preferably, the filtering module includes a first magnetic ring 3, a Y capacitor, and a second magnetic ring 6. The first magnetic ring 3 is fixed in the first cavity 701 in the junction box 1 by a fixing member and is close to the high-voltage wire inlet. The Y capacitor is fixed on the DC terminal block 4 by a fixing member. The Y capacitor forms an electrical circuit with the positive and negative copper bars 5 through screws. The second magnetic ring 6 is potted on the DC terminal block 4, and the DC terminal block 4 is fixed on the box body 7 by a fixing member.

[0046] The positive and negative copper bars 5 are used to distribute the filtered DC voltage to different parts of the system and provide a low-impedance current path at the same time.

[0047] Preferably, the upper side of the box body 7 provided with the first cavity 701 and the second cavity 702 further includes a control board 11 and a shielding board 12. The shielding board 12 is located above the power module 9 and is fixedly installed on the box body 7, and the control board 11 is fixedly installed above the shielding board 12.

[0048] The DC terminal block 4 is used to connect the high-voltage input wire harness and the positive and negative copper bars.

[0049] The positive and negative copper bars 5 are used for current conduction.

[0050] The bus capacitor 14 is used for filtering and smoothing the bus voltage.

[0051] The AC mounting base 16 is used to connect the three-phase copper bar and the three-phase high-voltage wire harness.

[0052] The three-phase magnetic ring 17 is used to attenuate the electromagnetic interference on the high-voltage wire harness.

[0053] Embodiment 2

[0054] Preferably, a water nozzle 15 is installed at the middle of each of the two corresponding sides of the box body 7. The water nozzles 15 are symmetrically distributed left and right along the box body 7, and the water nozzles 15 are installed on both sides of the box body 7 by interference fit; a low-voltage connector 13 is installed at the middle of each of the two corresponding sides of the box body 7 near the top. The low-voltage connectors 13 are symmetrically distributed left and right along the box body 7.

[0055] The low-voltage connector 13 is used to connect the vehicle and the motor controller for communication and power supply, and is installed on the box body by screws.

[0056] The water nozzle 15 is used to connect the cooling channels of the vehicle and the motor controller.

[0057] When the box body is designed structurally, a symmetrical design is adopted, which can make the maintenance cover meet the assembly requirements of the upper and lower covers, improve the reusability, reduce the development cost of parts, and the low-voltage connector 13 and the water nozzle 15 can be installed on the left and right of the box body to make the product meet diverse requirements;

[0058] The control board 11 is used to control the operation of the power module and receive vehicle communication information.

[0059] The shielding board 12 is used to support the control board and protect the control, preventing the interference generated by the power module from affecting the normal operation of the control board.

[0060] Preferably, the filtering module and the three-phase magnetic ring 17 are both within the junction box 1; the separator 19 is parallel to the short side of the box body 7.

[0061] Preferably, the fixing part is a screw, and the separator 19 is a retaining wall.

[0062] Preferably, both the DC terminal block 4 and the AC mounting seat 16 are provided with a double-output and double-input structure.

[0063] When the DC terminal block 4 and the AC mounting seat 16 are designed structurally, a compatible design is adopted, and a double-output and double-input mounting structure is reserved. In this way, different drive modes, such as the single-electronic control double-output mode, the single-electronic control single-output mode, and the double-motor controller output mode, can be realized by modifying the junction box 1, the positive and negative copper bars 5, and the three-phase copper bar 8, reducing the number of mold openings of the controller, thereby reducing the development cost of the controller and facilitating the platform management of the product.

[0064] Preferably, water ports 20 are provided at both sides of the box body 7 near the bottom. Two water ports 20 are installed on each side of the box body 7. The water ports on each side are symmetrically distributed left and right along the box body 7 with respect to the water ports on the other side, and the water ports on the same side are symmetrically distributed on one side of the box body 7.

[0065] In traditional water channels, the inlet and outlet are clearly distinguishable. When changing the positions of the inlet and outlet, it will affect the flow resistance and temperature rise of the entire system, resulting in the inability to swap the positions of the inlet and outlet. In the design of the water channels of the present utility model, a symmetrical structure is adopted, so that swapping the inlet and outlet will not affect the flow resistance and temperature rise of the system. Moreover, in the structural design, by changing the mold inserts, the diversity of the water channels can be improved, and the adaptability of the water channel interfaces can be enhanced. Through the above methods, there are a total of 6 matching results for the positions of the inlet and outlet of the water channels: there are two matching results when both are on one side at the same time, two matching results when both are on the other side at the same time, and two matching results when arranged left and right. The symmetrical structure design of the upper cover and the lower cover improves the interchangeability of the products, and the upper and lower covers are universal, reducing the mold development cost.

[0066] In the design of traditional cooling systems, swapping the positions of the inlet and outlet will affect the flow resistance of the entire system, and indirectly also affect the heat dissipation capacity of the system. When designing the cooling system of the present utility model, the inlet and outlet and the flow channels (the tooth shape of the flow channels is not required) are symmetrical about the X-axis, so swapping the positions of the inlet and outlet will not affect the flow resistance and heat dissipation capacity of the system. The 4 water ports designed on the box body are connected to the flow channels through the change of the mold inserts. When designing the 4 water ports, they are symmetrical about the X / Y axis, which is beneficial for the later product derivation and the swapping of the positions of the inlet and outlet.

[0067] By replacing the inserts, two types of cooling systems are derived. The water ports and the flow channels are symmetrical about the Y-axis (the tooth shape of the flow channels is not restricted). One type has the inlet and outlet placed at the left end, and the other type has the inlet and outlet placed at the right end.

[0068] Such as Figure 9 is a schematic diagram of the water port design of a motor controller.

[0069] The high-voltage current transmission path of the controller is as follows: The power battery flows into the motor controller through the high-voltage positive and negative poles. At the DC terminal block 4, the bus capacitor 14 is connected to the high-voltage positive and negative poles together, and then passes through the power module 9 to the three-phase copper bar 8. At the AC mounting seat 16, the three-phase copper bar 8 is connected to the three-phase cable, and finally reaches the motor for driving.

[0070] Such as Figure 6 shown is the single-motor controller single-output structure layout of the motor controller. The power module is fixed to the upper layer of the box body 7 with 9 screws. The input end of the power module 9 is connected to the output end of the component bus capacitor 14 with screws. The output end of the power module 9 is connected to the three-phase copper bar 8 with screws. The other end of the three-phase copper bar 8 is connected to the three-phase high-voltage wire harness at the AC mounting seat 16, and all the high-voltage wire harnesses are fixed to the junction box 1.

[0071] Such as Figure 4 shown is the double-motor controller double-output structure layout of the motor controller and Figure 5The single-motor controller dual-output structural layout of the motor controller shown. In the dual-motor controller dual-output and single-motor controller dual-output structures, the junction box structure is the same as that of the single-motor controller single-output structure, but different from the single-motor controller single-output structure. However, the layout is the same as that of the single-motor controller single-output structure. Just replace the power module specifications and busbar specifications.

[0072] Preferably, one end of the positive and negative busbars 5 is connected to the high-voltage input wire harness through screws, and the other end of the positive and negative busbars 5 is connected to the input end of the bus capacitor 14 through screws.

[0073] Preferably, the bus capacitor 14 is fixed to the lower layer of the box body 7 through screws. The output end of the power module 9 is connected to the three-phase busbar 8 through screws. The cover 10 is fixed to the upper and lower parts of the box body 7 through screws. The control board 11 is installed on the shielding board 12 through screws. The shielding board 12 is installed on the box body 7 through screws. The low-voltage connector 13 is installed on the box body 7 through screws and is connected to the control board 11. The AC mounting seat 16 is installed on the box body 7 through screws. The three-phase magnetic ring 17 is fixed in the second cavity 702 in the junction box 1 through screws.

[0074] The low-voltage connector, water nozzle, and water inlet of the motor controller of the present invention adopt a left-right symmetric structure design, and the filter module and three-phase magnetic ring are split-designed in two completely independent first cavities and second cavities. The symmetric structure and split design enable the motor controller to be installed and matched with the whole vehicle under different conditions. By making fewer structural changes, single and dual-motor control and single electric control dual-output functions can be achieved, which can meet greater current requirements, and thus reduce the product variety and development costs.

[0075] The above has made a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art, various changes can be made without departing from the purpose of the present invention.

[0076] Many other changes and modifications can be made without departing from the concept and scope of the present invention. It should be understood that the present invention is not limited to a specific embodiment, and the scope of the present invention is defined by the appended claims.

Claims

1. A motor controller, characterized in that, It includes a box body (7), a lid (10), a maintenance cover plate (2) and a junction box (1). There are two lids (10), and the two lids (10) are respectively detachably snapped onto the upper and lower parts of the box body (7). The maintenance cover plate (2) is detachably snapped onto the junction box (1). The junction box (1) is fastened to the front end of the box body (7) by a fixing member. The box body (7) with the lid (10) and the junction box (1) with the maintenance cover plate (2) form a first cavity (701) and a second cavity (702) which are arranged side by side and each is enclosed by a partition member (19). The first cavity (701) is equipped with a filtering module, a DC terminal block (4) and positive and negative busbars (5). The filtering module is respectively connected to the junction box (1), the DC terminal block (4) and the positive and negative busbars (5). The DC terminal block (4) is connected to the positive and negative busbars (5). The second cavity (702) is equipped with a three-phase magnetic ring (17) and an AC mounting base (16). The three-phase magnetic ring (17) is respectively connected to the junction box (1) and the AC mounting base (16). The AC mounting base (16) is fixedly installed with a three-phase busbar (8). On the upper side of the box body (7) where the first cavity (701) and the second cavity (702) are located, a power module (9) is installed. On the lower side of the box body (7) where the first cavity (701) and the second cavity (702) are located, a bus capacitor (14) is installed. The input end of the bus capacitor (14) is connected to the positive and negative busbars (5). The output end of the bus capacitor (14) is connected to the power module (9). The output end of the power module (9) is connected to the three-phase busbar (8). The three-phase busbar (8) on the AC mounting base (16) is connected to a three-phase high-voltage wire harness, and the three-phase high-voltage wire harness is fixed on the junction box (1).

2. The motor controller according to claim 1, characterized in that: The filtering module includes a first magnetic ring (3), a Y capacitor and a second magnetic ring (6). The first magnetic ring (3) is fixed in the first cavity (701) inside the junction box (1) by a fixing member and is close to the high-voltage wire inlet. The Y capacitor is fixed on the DC terminal block (4) by a fixing member. The Y capacitor forms an electrical circuit with the positive and negative busbars (5) through screws. The second magnetic ring (6) is potted on the DC terminal block (4), and the DC terminal block (4) is fixed on the box body (7) by a fixing member.

3. The motor controller according to claim 1, characterized in that: On the upper side of the box body (7) where the first cavity (701) and the second cavity (702) are located, there also include a control board (11) and a shielding board (12). The shielding board (12) is located above the power module (9) and is fixedly installed on the box body (7). The control board (11) is fixedly installed above the shielding board (12).

4. A motor controller according to claim 1, characterized in that: At the middle of each of the two opposite sides of the box body (7), a water nozzle (15) is installed. The water nozzles (15) are symmetrically distributed left and right along the box body (7). The water nozzles (15) are installed on both sides of the box body (7) by interference fit. At the middle of each of the two opposite sides of the box body (7) near the top, a low-voltage connector (13) is installed. The low-voltage connectors (13) are symmetrically distributed left and right along the box body (7).

5. A motor controller according to claim 1, characterized in that: Both the filtering module and the three-phase magnetic ring (17) are within the junction box (1); the separator (19) is parallel to the short side of the box body (7).

6. The motor controller according to claim 1, wherein: The fixing member is a screw, and the separator (19) is a retaining wall.

7. The motor controller according to claim 1, wherein: Both the DC terminal block (4) and the AC mounting base (16) are provided with a dual-output and dual-input structure.

8. A motor controller according to claim 1, wherein: Water outlets (20) are provided near the bottom on both sides of the box body (7). Two water outlets (20) are installed on each side of the box body (7). The water outlets on each side are symmetrically distributed left and right along the box body (7) with respect to the water outlets on the other side, and the water outlets on the same side are symmetrically distributed on one side of the box body (7).

9. The motor controller according to claim 1, wherein: One end of the positive and negative copper busbars (5) is connected to the high-voltage input wire harness by a screw, and the other end of the positive and negative copper busbars (5) is connected to the input end of the bus capacitor (14) by a screw.

10. A motor controller according to claim 1, characterized in that: The bus capacitor (14) is fixed to the lower layer of the box body (7) by screws. The output end of the power module (9) is connected to the three-phase copper busbar (8) by screws. The cover (10) is fixed to the top and bottom of the box body (7) by screws. The control board (11) is installed on the shielding board (12) by screws. The shielding board (12) is installed on the box body (7) by screws. The low-voltage connector (13) is installed on the box body (7) by screws and is connected to the control board (11). The AC mounting base (16) is installed on the box body (7) by screws. The three-phase magnetic ring (17) is fixed in the second cavity (702) within the junction box (1) by screws.

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