Motor control device with fixed cover, drive assembly and vehicle

Abstract

The present invention provides a motor control device, a drive assembly, and a vehicle with a fixed cover. The motor control device includes a housing, a circuit device, a first cover, and a second cover. The circuit device is disposed within the housing and includes a substrate and a device assembly. The device assembly is welded to the substrate. The first cover is provided with a receiving groove. The substrate is located within the receiving groove. The receiving groove is filled with potting compound. The potting compound surrounds the welded fixed end of the device assembly. The second cover covers the free end of the device assembly. The first cover covers one side of the substrate and is filled with potting compound for sealing, fixing, and heat conduction. The second cover then covers the free end of the device assembly to maintain the free end in place.

Description

Technical Field

[0001] The present invention relates to the field of new energy equipment, and in particular to a motor control device with a fixed cover, a drive assembly, and a vehicle. Background Art

[0002] New energy vehicles do not generate power by burning gasoline or diesel, so they have many characteristics such as environmental protection and low pollution. With the vigorous promotion and application of new energy power generation such as hydropower, wind power, solar power and nuclear power, many new energy vehicles are gradually being promoted and applied, such as new energy electric cars, new energy electric buses, new energy electric trucks, new energy electric cleaning vehicles, new energy electric rail vehicles, new energy electric flying vehicles, new energy electric shipping vehicles, etc.

[0003] New energy vehicles are generally equipped with batteries, motor control devices, motors and power generation devices. The power tube in the motor control device receives the DC power output by the battery, and converts the DC power into AC power to output to the motor. The motor then outputs a rotational driving force to drive the power generation devices such as wheels and paddles, and then drive the vehicle to move.

[0004] As vehicles integrate drive assemblies, i.e., motors and motor control devices, the space occupied by the drive assembly or motor control device needs to be further optimized and reduced, thereby freeing up more space for passenger space, battery space, etc. When integrating the motor and motor controller, it is necessary to consider the wiring structure, routing layout and structural layout between the motor and the motor controller, control the thickness of the motor control device and the radial dimension of the drive assembly, and coordinate with the reasonable arrangement of numerous circuit components. In addition, it is necessary to improve the seismic performance of the device to improve the operating stability of the equipment, so as to fully realize the efficient integration of the drive assembly. Summary of the Invention

[0005] A first object of the present invention is to provide a motor control device in which a circuit device is covered and fixed by a cover.

[0006] A second object of the present invention is to provide a drive assembly having the above-mentioned motor control device.

[0007] A third object of the present invention is to provide a vehicle having the above-mentioned drive assembly.

[0008] In order to achieve the first purpose of the present invention, the present invention provides a motor control device with a cover body fixed, including a shell, a circuit device, a first cover body and a second cover body, the circuit device is arranged in the shell, the circuit device includes a substrate and a device assembly, the device assembly is welded on the substrate, the first cover body is provided with a receiving groove, the substrate is located in the receiving groove, the receiving groove is filled with potting glue, the potting glue surrounds the welding fixed end of the device assembly, and the second cover body covers the free end of the device assembly.

[0009] As can be seen from the above solution, the first cover is covered on one side of the substrate and filled with potting glue for sealing, fixing and heat conduction, and then the second cover is covered on the free end of the device assembly to keep the free end fixed.

[0010] A further solution is that the device assembly includes a plurality of electrode connecting pieces, which are welded on the substrate; the second cover is provided with a plurality of first limiting grooves, and one electrode connecting piece is located in one first limiting groove.

[0011] A further solution is that side walls are respectively provided on both sides of the first limiting groove, and the side walls are located on both sides of the electrode connecting piece.

[0012] A further solution is that the electrode connecting piece is provided with multiple welding pins, the welding fixing ends are located on the welding pins, and a first clamping portion is provided between the welding pins; a second clamping portion is provided on the side wall, and the second clamping portion is clamped with the first clamping portion.

[0013] As can be seen from the above, the sheet-shaped electrode connecting piece is fixed by clearance fit through the first limiting groove, and is matched with the clamping portion to achieve a stable connection.

[0014] A further solution is that the device assembly also includes multiple power device modules, one power device module is located between two adjacent electrode connecting plates, the power device module includes a cooling bridge, multiple power tubes and a holding piece, the power tube is adjacent to the cooling bridge, the holding piece clamps the cooling bridge and the power tube, and the power tube is welded to the substrate; the second cover body is provided with multiple second limiting grooves, a second limiting groove is located between two adjacent first limiting grooves, and a power device module is located in a second limiting groove.

[0015] A further solution is that the side wall of the second limiting groove is provided with an abutment block, and the abutment block abuts against the holding member.

[0016] A further solution is that the abutment block is located at the connection between the side wall of the second limiting groove and the bottom wall of the second limiting groove.

[0017] As can be seen from the above, the power device module is limited and fixed by the second limiting groove, and the abutment block is in abutment with the holding member, so that the holding member maintains a relatively good clamping force, thereby improving the connection stability at the free end.

[0018] A further solution is that the motor control device also includes a control board, which is provided with a control circuit and a control interface seat. The control board is arranged on a second cover, and the second cover is located between the control board and the circuit device; based on the normal projection of the control board, the control interface seat is located outside the projection of the second cover.

[0019] As can be seen from the above, by setting the control board on the second cover and coordinating the staggered design, the control interface seat is located outside the projection of the second cover, so the wiring of the control interface seat is not blocked by the second cover, thereby optimizing the wiring layout of the control circuit.

[0020] In order to achieve the second object of the present invention, the present invention provides a drive assembly including the motor control device according to the above solution.

[0021] In order to achieve the third object of the present invention, the present invention provides a vehicle comprising a drive assembly as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of an embodiment of a drive assembly of the present invention.

[0023] Figure 2 It is a structural diagram of the drive assembly embodiment of the present invention from another perspective.

[0024] Figure 3 It is an exploded view of an embodiment of a drive assembly of the present invention.

[0025] Figure 4 1 is a structural diagram of the motor control device in the drive assembly embodiment of the present invention from a bottom side perspective.

[0026] Figure 5 1 is an exploded view of a motor control device in an embodiment of a drive assembly of the present invention.

[0027] Figure 6 This is a structural diagram of the motor control device in the drive assembly embodiment of the present invention with the housing omitted.

[0028] Figure 7 It is an exploded view of the motor control device in the drive assembly embodiment of the present invention with the housing omitted.

[0029] Figure 8 1 is an exploded view of the capacitor module in the drive assembly embodiment of the present invention.

[0030] Figure 9 It is a structural diagram of the electrode terminal block in the embodiment of the drive assembly of the present invention.

[0031] Figure 10 It is an exploded view of the electrode terminal block in the embodiment of the drive assembly of the present invention.

[0032] Figure 11 It is a partial cross-sectional view of the electrode terminal block at the semi-annular groove in the embodiment of the drive assembly of the present invention.

[0033] Figure 12 This is a structural diagram of the motor control device in the drive assembly embodiment of the present invention after omitting the cover and substrate.

[0034] Figure 13 1 is an exploded view of a circuit device in an embodiment of a drive assembly of the present invention.

[0035] Figure 14 It is an exploded view of another state of the circuit device in the embodiment of the drive assembly of the present invention.

[0036] Figure 15 2 is a cross-sectional view of a circuit device in an embodiment of a drive assembly of the present invention.

[0037] Figure 16 It is a structural diagram of an embodiment of the drive assembly of the present invention located at the housing seat.

[0038] Figure 17 It is an exploded view of the connecting components of the drive assembly embodiment of the present invention.

[0039] Figure 18 It is a cross-sectional view of a connecting component in an embodiment of a drive assembly of the present invention.

[0040] Figure 19 It is a cross-sectional view of the cooling bridge in the drive assembly embodiment of the present invention.

[0041] Figure 20 This is a structural diagram of an embodiment of the drive assembly of the present invention from the perspective of the control interface seat.

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0043] Drive assembly embodiment:

[0044] Reference Figures 1 to 3 The drive assembly includes a motor 2 and a motor control device 1, and the motor control device 1 is installed on the radial side of the motor housing 21 of the motor 2. Figures 4 to 7 The motor control device 1 includes a shell, a capacitor module 3, an electrode terminal block 4, a circuit device 5 and a control board 7. The shell includes a control shell 111, a control cover 112 and a connection cover 113. The control shell 111 forms an accommodating cavity. The control cover 112 and the connection cover 113 cover the control shell 111. The capacitor module 3, the electrode terminal block 4, the circuit device 5 and the control board 7 are arranged in the accommodating cavity.

[0045] Reference Figure 8 , and combined with Figure 15 The capacitor module 3 includes a shell 31 and multiple capacitor modules. The shell 31 is arranged in a bottomed cylindrical shape. The outer wall of the shell 31 is provided with an avoidance groove 313. Two or more partitions 311 are provided in the shell 31. The inner wall of the shell 31 and the partition 311 form a placement cavity 312. The multiple partitions 311 and the multiple placement cavities 312 are arranged along the second horizontal direction Y, and one capacitor module is placed in one placement cavity 312.

[0046] The capacitor module includes multiple capacitors 32, two electrode connecting plates 34 and a connecting frame 33. The connecting frame 33 is provided with a first mounting groove 331 and a second mounting groove 332 on both sides of the first horizontal X. The connecting frame 33 is provided with a third mounting groove 333 on the longitudinal Z side of the first mounting groove 331 and the second mounting groove 332. The connecting frame 33 is provided with multiple hollow holes 334. The connecting frame 33 is respectively provided with multiple positioning protrusions in the first mounting groove 331, the second mounting groove 332 and the third mounting groove 333. The first mounting groove 331, the second mounting groove 332 and the third mounting groove 333 are respectively provided with capacitors 32. The multiple positioning protrusions are located on both sides of the capacitor and are used to limit the capacitor.

[0047] The two electrode connecting pieces 34 and the connecting frame 33 are connected by injection molding. The two electrode connecting pieces 34 are respectively located on both sides of the second horizontal direction Y of the connecting frame 33. The electrode connecting piece 34 is provided with a first connecting end 341 connected to the capacitor 32 at the first mounting groove 331, and the electrode connecting piece 34 is provided with a second connecting end 342 connected to the capacitor 32 at the second mounting groove 332. The electrode connecting piece 34 is provided with a third connecting end 343 connected to the capacitor 32 at the third mounting groove 333. The electrode connecting piece 34 is provided with a fourth connecting end 344 on the opposite side of the third mounting groove 333 in the longitudinal direction Z. The fourth connecting end 344 is welded to the substrate as a welding end. The electrode connecting piece 34 on one side is used as a positive electrode connecting piece, and the electrode connecting piece 34 on the other side is used as a negative electrode connecting piece.

[0048] After the capacitor module is placed in the placement cavity 312, the avoidance groove 313 is close to the position of the second installation groove 332 and the third installation groove 333, thereby realizing the avoidance design, and the installation direction of the first installation groove 331 is parallel to the installation direction of the second installation groove 332, and the installation direction of the first installation groove 331 is perpendicular to the installation direction of the third installation groove 333, that is, the capacitor of the first installation groove 331 is installed vertically, and the capacitor of the second installation groove 333 is installed horizontally, and the shell 31 is filled with potting compound, and the potting compound wraps the capacitor module. The shell 31 is provided with an opening, and the end of the fourth connection terminal 344 extends out of the opening, so that the potting compound does not wrap the end of the fourth connection terminal 344, and does not affect the welding of the fourth connection terminal 344 to the substrate.

[0049] Reference Figures 9 to 11 The electrode terminal block 4 includes a base body 41, at least two electrode connecting pieces 42 and a filter circuit module 43. The base body 41 is provided with a terminal bottom wall and a terminal cavity wall. The terminal bottom wall and the terminal cavity wall form a terminal cavity 411. The terminal cavity 411 is provided with an operation opening on the longitudinal side opposite to the terminal bottom wall. Two terminal holes 412 are provided through the terminal cavity wall in the horizontal direction. The two terminal holes 412 are arranged side by side in the horizontal direction, and the terminal holes 412 are connected to the terminal cavity 411.

[0050] The two electrode connecting pieces 42 can be used as the positive and negative electrode connecting pieces respectively. The two electrode connecting pieces 42 pass through the wiring cavity wall. The electrode connecting piece 42 is provided with an internal connection portion 422 in the wiring cavity 411, and the electrode connecting piece 42 is provided with an external connection portion 421 outside the wiring cavity 411. The base body 41 and the electrode connecting piece 42 are connected by injection molding.

[0051] The seat body 41 is provided with a partition wall 413 in the wiring cavity 411 . The partition wall 413 is located between the two internal connection parts 422 . A trigger 45 is provided on the top of the partition wall 413 . The trigger 45 is located at the operation opening of the electrode wiring seat 4 .

[0052] The filter circuit module 43 includes a substrate 431, a fixing plate 434 and two capacitors 433. The filter circuit is provided on the substrate 431, and the capacitors 433 are welded on the substrate 431. Two positioning grooves 432 are provided on the substrate 431. The two capacitors 433 and the two positioning grooves 432 are arranged alternately. The fixing plate 434 is arranged in an arch shape and is connected to the substrate 431. The fixing plate 434 is located above the positioning groove 432 and between the two capacitors 433.

[0053] Two positioning posts 441 and two fixing posts 442 are provided on the outer bottom wall of the wiring bottom wall. One fixing post 442 is located on one radial side of one positioning post 441. The base plate 431 is provided with a positioning groove 432 to limit the positioning of the positioning post 441. The capacitor 433 is located on one side of the positioning post 441, and the middle capacitor 433 is located between the two positioning posts 441. The fixing piece 434 is connected and fixed to the fixing post 442. The electrode connecting piece 42 is also provided with a welding foot 423 on one side of the external connection portion 421. The welding foot 423 is welded to the base plate 431. The terminal of the trigger 45 is located on the outer bottom wall of the wiring bottom wall, and the terminal of the trigger 45 is connected to the base plate. The end of the positioning post 441 is provided with a positioning hole 443, and the fixing post 442 is provided with a fixing hole.

[0054] The base body 41 is provided with an annular groove 414 on the outer periphery of the two wiring holes 412. The annular groove 414 is arranged in a waist-shaped shape. At the outer periphery of one of the wiring holes 412, a semi-annular groove 415 is provided on the bottom wall of the annular groove 414. The semi-annular groove 415 is located on the outer periphery of the wiring hole 412. The magnetic ring 46 is arranged in the annular groove 414. The current sensor (not shown) is arranged in the semi-annular groove 415. The current sensor is located on the inner side of the magnetic ring 46. The base body 41 is provided with a wiring hole 416 at the bottom of the semi-annular groove 415. The wiring hole 416 is used to set the wiring terminal of the current sensor.

[0055] Reference Figure 5 、 Figure 12 and Figure 18The control housing 111 is provided with two parallel wiring holes 121 on the side wall 103. Each 121 is provided with a shielding ring 122, a sealing ring 123 and a cover 124. The electrode terminal block 4 is provided in the control housing 111 and is close to the wiring hole 121. The wiring hole 121 is opposite to the wiring hole 412 and is connected together. The fixing column 442 is fixedly connected to the bottom wall of the control housing 111 by screws, and the positioning column 444 on the bottom wall of the control housing 111 is limitedly engaged with the positioning hole 443. When the connecting cover 113 covers the wiring cavity 411, the wiring cavity 411 forms a relatively closed space, which is isolated from the chamber enclosed by the control housing 111. The connecting cover 113 is adjacent to the trigger 45, which can trigger the corresponding closing signal. The positive and negative poles of the battery can be inserted through the wiring hole 121 and extend into the wiring cavity 411, and respectively connected to the internal connection part 422.

[0056] Reference Figures 12 to 15 The motor control device further includes a circuit device, a first cover 57, and a second cover 58 disposed within the housing. The circuit device includes a substrate 511, a positive busbar 512, a negative busbar 513, an electrode connector 4 of the capacitor module 3, and a device assembly. The device assembly includes five electrode connectors 53, three cooling bridges 54, multiple power tubes 561, a heat conducting sheet 562, and three holding members 55. The substrate 511, positive busbar 512, and negative busbar 513 are stacked in sequence. The positive busbar 512 and the negative busbar 513 are metal conductive busbars. Pins and avoidance holes are respectively provided on the positive busbar 512 and the negative busbar 51. The pins of the negative busbar 51 pass through the avoidance holes of the positive busbar 512 and are welded to the substrate 511, while the pins of the positive busbar 512 are welded to the substrate 511.

[0057] The five electrode connectors 53 serve as the positive, negative, U-phase, V-phase, and W-phase connectors, respectively. The positive and negative connectors are located adjacent to each other at the edge, while the U-phase, V-phase, and W-phase connectors are evenly spaced. The electrode connectors 53 have connecting ends 533 arranged horizontally and multiple welding pins 531 arranged vertically. The welding fixing ends are located on the welding pins 531, and second clamping portions 532 are provided between the multiple welding pins 531. The second clamping portions 532 are arranged in a slot configuration. The pins of the electrode connector 53 are each passed through the corresponding avoidance holes and welded to the substrate 511.

[0058] Reference Figure 14 and Figure 19The cooling bridge 54 has a cooling channel 541 disposed within it along the first horizontal direction Y. Cooling interfaces 542 are provided at both ends of the cooling channel 541 in the first horizontal direction Y. Heat-conducting outer walls 545 are provided at both ends of the cooling bridge 54 in the second horizontal direction X. The heat-conducting outer walls 545 are arranged in a planar manner and extend along the first horizontal direction Y. The cooling bridge 54 has longitudinal end walls 546 and 547 at both ends of the vertical direction. The power tube 561 is adjacent to the heat-conducting outer walls 545, and a heat-conducting sheet 562 can also be adjacent to the power tube 561 and the heat-conducting outer wall 545. In the vertical direction, the cooling interface 542 is located between the two longitudinal end walls 546 and 547. A mounting hole 543 and a positioning hole 544 are provided on one side of the cooling interface 542 of the cooling bridge 544. The positioning hole 544 is located to one side of the mounting hole 543. Three positioning posts 548 are provided on the longitudinal end wall 546. The positioning posts 548 and the cooling interface 542 are located on the same side in the vertical direction. Connecting pieces 549 are fixedly provided at both ends of the cooling bridge 54 in the first horizontal direction Y. The connecting piece 549 is provided with connecting pins extending in the vertical direction. The cooling interface 542 and the connecting pins are respectively located at both ends in the vertical direction. The connecting pins of the connecting piece 549, the pins of the power tube, and the welding pins 531 of the electrode connecting piece 53 pass through the positive busbar 512 and the negative busbar 51 respectively and are welded to the substrate 511. An insulating plate 515 is provided between the electrode connecting piece 53 and the negative busbar 51, and an insulating plate 514 is provided between the positive busbar 512 and the negative busbar 51.

[0059] Reference Figure 5 The control housing 111 of the housing is provided with two mounting steps 114 within it, with a mounting slot between them. A connection port 115 is provided through the mounting steps 114. The mounting steps 114 are also provided with connection holes 116 and positioning posts 117. When the cooling bridge 54 is installed between the mounting steps 114, a cooling interface 542 is mounted on one of the mounting steps 114 and communicates with one of the connection ports 115. The mounting hole 543 and the connection hole 116 are fixedly connected by screws. The positioning posts 117 and the positioning holes 544 are limitedly engaged, and the longitudinal end wall 547 is located between the two mounting steps 114. The control housing 111 is provided with a mounting slot on the back side of the mounting steps 114 for connecting to the cooling channel of the motor.

[0060] The holding member 55 includes a connecting base 551, a plurality of holding portions 553 and a plurality of connecting portions 555. The connecting base 551 is sheet-shaped and extends along the first horizontal direction Y. The plurality of holding portions 553 are respectively connected to both sides of the connecting base 551 along the second horizontal direction X and are arranged one by one opposite to each other. The plurality of holding portions 553 on the same side are arranged along the first horizontal direction Y. A groove 554 is provided between two adjacent holding portions 553 on the same side. The first horizontal direction Y is perpendicular to the second horizontal direction X. A connecting portion 555 is connected between two adjacent holding portions 553 on the same side. The connecting portion 555 is close to the free end of the pressing portion 553, and the connecting portion 555 is arranged in a strip shape. The connecting portion 555 is connected between the two pressing portions 553 along the first horizontal direction Y. The fixed end of the pressing portion 553 is connected to the connecting base 551. The free end of the pressing portion 553 is provided with a contact arc surface. The connecting base 551 is provided with a plurality of positioning holes 552. The plurality of positioning holes 552 are arranged along the first horizontal direction Y. The integrated pressing part 55 is punched and cut to form the connecting base 551, the pressing portion 553, the positioning holes 552 and the connecting portion 55.

[0061] When the holding member 55 is clamping the power tube 561 and the cooling bridge 55, the claws of a specific expander extend into the groove 554 and abut against the connecting portion 555. The expander then expands the connecting portion 555 and the holding portion 553 outward, clamping them on the outside of the power tubes 561 on both sides, ensuring a tight fit between the power tubes 561 and the cooling bridge 55 located therebetween. The expander is then removed to complete the clamping process, with the positioning holes 552 cooperating with the positioning posts 548 to position them. A cooling bridge 54, multiple power tubes 561, and a holding member 55 constitute a power device module, with a power device module disposed between two adjacent U-phase connecting pieces, V-phase connecting pieces, and W-phase connecting pieces.

[0062] Reference Figure 14 and Figure 15 The first cover body 57 is located on a side close to the substrate 511. The first cover body 57 is provided with a receiving groove. The substrate 511, the positive busbar 512, the negative busbar 513 and the welding points of the above-mentioned devices are all located in the receiving groove. The receiving groove is filled with potting glue, and the potting glue surrounds the welding fixed ends of the above-mentioned devices.

[0063] The second cover 58 is located on the other side of the substrate 511 relative to the first cover 57. The second cover 58 has a substrate. The second cover 58 is provided with five first limiting grooves 581 on the substrate, and a second limiting groove 584 is provided in the middle of the substrate. The first limiting grooves 581 and the second limiting grooves 584 are arranged along the second horizontal direction Y. The second limiting groove 584 is located between the two first limiting grooves 581 in the middle. The first limiting grooves 581 and the second limiting grooves 584 extend along the first horizontal direction X. When the second cover 58 covers the device assembly After the free end, an electrode connecting piece 53 is located in a first limiting groove 581, and side walls 582 are respectively provided on both sides of the first limiting groove 581. The side walls 582 are located on both sides of the electrode connecting piece 53. A first clamping portion 532 is provided between the welding pins 531. The first clamping portion 532 is arranged in a slot. Second clamping portions 583 are provided on the two side walls 582. The second clamping portions 583 are arranged in a hook arrangement, and the two second clamping portions 583 are arranged opposite to each other, and the second clamping portion 583 and the first clamping portion 532 are engaged.

[0064] A power device module is located in a second limiting groove 584. The two side walls 582 of the second limiting groove 584 are respectively provided with abutment blocks 586. The abutment blocks 586 are located at the connection between the side walls 582 of the second limiting groove 584 and the bottom wall of the second limiting groove 584. A plurality of positioning ribs 587 are also provided on the abutment block 586. The plurality of positioning ribs 587 are arranged along the second horizontal direction Y. The abutment block 586 abuts against the holding piece, and the positioning ribs 587 are located in the groove body 554 for limiting cooperation.

[0065] In addition, the cooling interface 542 of the cooling bridge 54 away from the connection end 533 is exposed on the second cover 58 , and the second cover 58 is provided with a hollow portion 585 at the cooling interface 542 of the cooling bridge 54 close to the connection end 533 , and the cooling interface 542 is located at the hollow portion 585 .

[0066] Reference Figures 16 to 20 The motor includes a motor housing 21, a stator 201 and a rotor 202. The stator 201 and the rotor 202 are both arranged in the motor housing 21. The rotor 202 rotates in the stator 201. The motor housing 21 is provided with a housing seat 22 at the other end relative to the axial output end of the stator 201. The housing seat 22 is provided with a wire collecting cavity 221. The wire collecting cavity 221 is provided with an opening in the axial direction. The machine cover 23 covers the opening so that the wire collecting cavity 221 is relatively closed. The housing seat 22 is provided with a slot 224 along the radial direction. The slot 224 is arranged toward the motor control device 1. The slot 224 is connected to the wire collecting cavity 221. The housing seat 22 is also provided with a signal slot along the radial direction. The signal slot is used to be installed and matched with the signal connector 63. The housing seat 22 is provided with a partition 225 in the wire collecting cavity 221. The partition 225 is located between the signal slot and the slot 224.

[0067] The connecting assembly 6 includes a connecting seat body 61 and an electrical connecting assembly. The electrical connecting assembly includes three single-phase connecting pieces 62 and a signal connector 63. The three single-phase connecting pieces 62 and the signal connector 63 all pass through the connecting seat body 61. The connecting seat body 61 and the electrical connecting assembly are connected by injection molding. A snap 64 is provided at the lower end of the connecting seat body 61. When the lower end of the connecting seat body 61 passes through the slot 224, the snap 64 engages with the slot 224. The single-phase connecting piece 62 is respectively provided with an electric control connection end and a motor connection end at both ends. The electric control connection end is arranged in a bent manner. After the upper end of the connecting seat body 61 passes through the wiring hole 118, the electric control connection ends of the three single-phase connecting pieces 62 are respectively connected to the connection end 533 of an electrode connecting piece 53, and the electrode connecting piece 53 is a single-phase electrode piece, and the signal connector 63 passes through the signal wiring hole 119 located on one side of the wiring hole 118.

[0068] The shell base 22 is provided with a wire hub 223 in the wire hub cavity 221. The wire hub 223 is provided with three connecting nuts. The wire hub 223 is electrically connected to the winding of the stator 201, and the motor connection end is electrically connected to the wire hub 223, thereby completing the connection between the electrode connecting piece 53 and the winding of the stator 201. At the same time, the partition 225 is located between the motor connection end of the single-phase connecting piece 62 and the motor connection end of the signal connector 63, and the control signal or feedback signal of the motor is output to the motor control device through the signal connector 63.

[0069] The motor control device also includes a connecting bracket 64. The connecting bracket 64 and three single-phase electrode sheets constitute a three-phase electrode connection assembly. The connecting bracket 64 is arranged on the outside of the wiring hole 118 and the signal wiring hole 119, and is also surrounded by the inner side of the side wall 102. The connecting bracket 64 is provided with three through-holes, and the connecting end 533 passes through the through-holes. An annular groove 641 is provided on the outside of the three connecting ends 533, and a magnetic ring (not shown) is provided in the annular groove 641. The connecting bracket 64 is provided with a circuit board 642 on the side opposite to the annular groove 641. The circuit board 642 is also provided with three through-holes, and the connecting end 533 passes through the through-holes. The circuit board 642 is provided with a mounting position 643 on the outer periphery of the connecting end 533. The mounting position 643 is used to install a Hall current sensor (not shown). The Hall current sensor is welded on the signal board 642. The single-phase electrode sheet passes through the Hall current sensor, the circuit board 642 and the connecting bracket 64.

[0070] The control board 7 is arranged on the second cover body 58, and the second cover body 58 is located between the control board 7 and the circuit device. The control board 7 is connected and fixed to the connecting column 587 of the second cover body 58. The control board 7 is provided with a control circuit and a control interface seat 71. The second cover body 58 is provided with a first avoidance groove 588. The control interface seat 71 is located in the first avoidance groove 588, and some other circuit devices on the control board 7 are located on the other side relative to the second cover body 58. The first cover body 57 is provided with a second avoidance groove 571. The positions of the first avoidance groove 588 and the second avoidance groove 571 correspond to each other. Then, based on the normal projection of the control board 7, the control interface seat 71 is respectively located outside the projection of the second cover body 58 and the projection of the first cover body 57, and the control interface seat 71 is located inside the projection of the second avoidance groove 571.

[0071] The control housing 111 includes a first side wall 101, a second side wall 102, and a third side wall 103 arranged adjacent to each other. The first side wall 101 and the third side wall 103 are located on opposite sides. The control interface seat 71 is adjacent to the first side wall 101. The motor control device is provided with a control wiring seat 72 on the first side wall 101. The control wiring seat 72 is adjacent to and electrically connected to the control interface seat 71. The motor control device is provided with a signal connection seat near the second side wall 102. The signal connection seat is used to connect to the signal connector 63. The three single-phase electrode sheets, the signal connection seat, and the signal board 642 are adjacent to the second side wall 102. The motor signal connection seat is electrically connected to the control interface seat 71. The electrode terminal block 4 and the capacitor module 3 are both located near the third side wall 103 and on the same side of the substrate 511. The current sensor is close to the third side wall 103, and the wiring hole 416 is close to the connection between the third side wall 103 and the second side wall 102. The wiring terminal of the current sensor is installed after the wiring hole 416, thereby realizing electrical connection between the current sensor and the circuit board 642, and the circuit board 642 is connected to the control interface seat 71.

[0072] Vehicle Example:

[0073] The vehicle includes a drive assembly as described above, and the drive assembly may be integrated with a transmission or may not be integrated with a transmission. The vehicle may be a new energy electric car, a new energy electric bus, a new energy electric truck, a new energy electric cleaning vehicle, a new energy electric rail vehicle, a new energy electric flying vehicle, a new energy electric shipping vehicle, etc.

[0074] As can be seen from the above, the three mounting slots provided by the connecting frame are used to install and position the capacitors, and cooperate with the connection of the electrode connecting pieces on both sides to realize the parallel connection of the three capacitors, thereby effectively increasing the capacitance, and utilizing the left and right side arrangements and the bottom side arrangements to realize the stacked arrangement of the capacitors, optimizing the layout structure to make the structural size more compact, which is conducive to further reducing the size of the device equipment. Furthermore, by loading the capacitor module in the shell cover, not only the modular arrangement of the capacitor module is realized, but also it is conducive to improving the shock resistance and stability of the device. Filling the shell cover with potting glue not only improves the stable connectivity of the capacitor module, but also uses the potting glue to improve insulation and thermal conductivity. Multiple hollow holes can be used for heat conduction, and can also cooperate with the penetration of the potting glue to improve the connection stability and efficient thermal conductivity. The positioning convex edge improves the stable support and limitation of the capacitor. The electrode connecting piece and the connecting frame are connected together using the injection molding process, which not only has a stable connection, but also facilitates the connection and assembly of the capacitor. From a cross-sectional view, the capacitors in the first and second mounting slots are arranged vertically, while the capacitors in the third mounting slot below are arranged horizontally. Combined with the arrangement of the avoidance slots, the capacitor module is arranged roughly in an "L" shape, effectively utilizing the horizontal space and reducing the vertical arrangement space.

[0075] Furthermore, the wiring cavity is enclosed by the wiring bottom wall and the wiring cavity wall, and the two electrode connectors extend through the wiring cavity wall, resulting in a relatively independent and sealed chamber. When the electrode terminal block is installed in the housing of the motor control device, the wiring cavity for electrical connection is isolated from the housing cavity, thereby preventing external interference with the circuit components within the housing during wiring, thereby improving the operational stability of the device. The injection molding process ensures the electrical connectivity of the electrode connectors while also providing high isolation for the integrated housing. A trigger is provided at the operating opening, which outputs an enable signal when the corresponding cover is closed, thereby detecting the correct closing of the cover and ensuring the stability of the device's operation. A filter circuit module is positioned on the electrode terminal block, located outside the wiring cavity. This filter circuit module filters the electrode connectors locally after they are connected to the positive and negative power sources, further improving device performance. The positioning post not only connects to the motor control device housing but also serves to position and install the filter circuit module. A magnetic ring is provided on the periphery to reduce electromagnetic interference. Not only can a magnetic ring be set on the outer periphery of the seat body, but a semi-ring groove can also be set at the bottom of the ring groove, and a current sensor can be set inside it to detect the current of the input electrode. The stacked arrangement of magnetic rings and current sensors can be used to optimize the spatial layout, making the structural layout of the electrode terminal block more compact.

[0076] Furthermore, by locating the cooling interface between the two longitudinal end walls, the interface's position does not interfere with the longitudinal height layout of the cooling bridge. The provision of mounting holes, positioning holes, and positioning posts facilitates the installation and stable connection of the cooling bridge to the motor control device housing. Because the cooling bridge needs to be adjacent to the power tube for heat conduction, the relative position of the cooling bridge and the power tube must be precisely maintained. This is achieved by securely connecting the cooling bridge with a connecting piece, and by welding the connecting pins and the power tube pins to the baseboard to achieve accurate relative fixation.

[0077] Furthermore, by connecting the holding portion with the connecting portion, multiple holding portions can apply approximately the same clamping force to the pressurized power tube, so the longitudinal dimension of the holding portion can be reduced while maintaining the required pressure. Furthermore, the external expander can conveniently position the groove body and the connecting portion, so that the holding portion is stretched outward, and then clamped to the corresponding position and then conveniently separated, thereby achieving simple installation, stability and efficiency. The free end of the connecting portion close to the holding portion can be easily stretched outward, further improving the convenience of installation. The abutting arc surface is used to abut against the surface of devices such as power tubes to avoid damage to the device packaging. The holding piece can be installed and positioned through the positioning hole to maintain a stable connection.

[0078] In addition, the first cover is covered on one side of the substrate and filled with potting glue for sealing, fixing and heat conduction, and then the second cover is covered on the free end of the device assembly to keep the free end fixed. The sheet-shaped electrode connecting piece is fixed by clearance fit through the first limiting groove, and a stable connection is achieved with the clamping part. The power device module is fixed by the second limiting groove, and the abutment block is matched with the holding piece to make the holding piece maintain a relatively good clamping force, thereby improving the connection stability at the free end. The control board is set on the second cover, and the staggered design is used to make the control interface seat outside the projection of the second cover, so that the wiring of the control interface seat is not blocked by the second cover, thereby optimizing the wiring layout of the control circuit.

[0079] Furthermore, a housing base is positioned at the axial rear end of the motor, with radial slots provided. The motor control device is located radially on the motor side. The housing bottom wall is provided with wiring holes. The connector body passes through the slots and wiring holes, allowing the electrical connection assembly to connect between the three-phase electrode connection assembly and the stator electrical connection. This enables radial arrangement and radial wiring of the motor control device, reducing the radial dimensions of the drive assembly, effectively reducing occupied space, improving space utilization, and achieving a highly integrated drive assembly. A wiring hub connects the stator windings, allowing the motor terminals to be conveniently connected to the hub. Three single-phase connectors provide drive energy, while the signal connector enables real-time monitoring of the motor's operating status. A partition provides enhanced isolation to prevent signal interference. A snap-fit ​​secures the connector body in the slot, and the injection molding process ensures a tight fit between the connector body and the electrical connection assembly, enhancing the sealing of the connection structure. The arrangement of the magnetic rings reduces electromagnetic interference, while a Hall effect current sensor enables real-time monitoring of the output current.

[0080] Furthermore, by covering one side of the substrate with the first cover, and then covering the free end of the device assembly with the second cover, the free end is then held fixed, and the control board is set on the second cover, and the staggered design is used to make the control interface seat outside the projection of the second cover, so that the wiring of the control interface seat is not blocked by the second cover, thereby optimizing the wiring layout of the control circuit. By designing two avoidance grooves, the control interface seat is located outside the projection of the two covers, optimizing the wiring layout and facilitating wiring. By respectively placing the control terminal seat, the motor signal connection seat, and the circuit board on three adjacent side walls, and connecting them in sequence using a bridging connection method, the wiring layout is optimized and lengthy wiring is avoided.

Claims

1. A motor control device with a fixed cover, characterized in that: It comprises a housing, a circuit device, a first cover and a second cover, wherein the circuit device, the first cover and the second cover are arranged in the housing; The circuit device is arranged in the housing, and the circuit device includes a substrate and a device assembly, and the device assembly is welded on the substrate; The first cover is provided with a receiving groove, the substrate is located in the receiving groove, the receiving groove is filled with potting glue, and the potting glue surrounds the welding fixing end of the device assembly; The second cover covers the free end of the device assembly; The device assembly includes a plurality of electrode connecting pieces, and the electrode connecting pieces are welded on the substrate; The second cover is provided with a plurality of first limiting grooves, and one of the electrode connecting pieces is located in one of the first limiting grooves; The device assembly further includes a plurality of power device modules, one of the power device modules being located between two adjacent electrode connecting sheets, the power device module including a cooling bridge, a plurality of power tubes, and a holding member, the power tubes being adjacent to the cooling bridge, the holding member clamping the cooling bridge and the power tubes, and the power tubes being welded to the substrate; The second cover is provided with a plurality of second limiting grooves, one second limiting groove is located between two adjacent first limiting grooves, and one power device module is located in one second limiting groove.

2. The motor control device according to claim 1, wherein: Side walls are respectively provided on both sides of the first limiting groove, and the side walls are located on both sides of the electrode connecting piece.

3. The motor control device according to claim 2, wherein: The electrode connecting piece is provided with a plurality of welding pins, the welding fixing end is located on the welding pins, and a first clamping portion is provided between the welding pins; A second clamping portion is provided on the side wall, and the second clamping portion is clamped with the first clamping portion.

4. The motor control device according to claim 1, wherein: The side wall of the second limiting groove is provided with an abutment block, and the abutment block abuts against the holding member.

5. The motor control device according to claim 4, characterized in that: The abutment block is located at the connection between the side wall of the second limiting groove and the bottom wall of the second limiting groove.

6. The motor control device according to any one of claims 1 to 5, characterized in that: The motor control device further comprises a control board, on which a control circuit and a control interface seat are provided, and the control board is provided on the second cover, which is located between the control board and the circuit device; Based on the normal projection of the control board, the control interface seat is located outside the projection of the second cover.

7. The drive assembly is characterized in that: The motor control device comprises the motor control device according to any one of claims 1 to 6.

8. A means of transport, characterized in that Comprising the drive assembly as described in claim 7 above.

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