Drive and control integrated motor

Abstract

The present invention provides a drive-control integrated motor, the main body of which is embedded in the stator and extends from the middle of the stator to the end of the stator to form a groove; the puncture piece is inserted into the groove of the winding skeleton, and an electrical connection is formed with the stator winding lead-out wire head through puncture inside the groove; the other end of the puncture piece is welded to the busbar circuit board, and the busbar circuit board and the control circuit board are electrically connected through a rectangular socket, a rectangular plug and a cable; after the control circuit board and the drive circuit board are connected by a screw and isolated by a limit device, the outer cylindrical surface is wrapped by a reel and then inserted into the inner cylindrical hole of a barrel-shaped structure heat dissipation base; the heat dissipation base and the shell are connected by an end cover. The present invention can realize the miniaturization, integration and low cost of the drive-control integrated motor while ensuring reliable electrical connection, effective heat dissipation and optimized structural support.

Description

Technical Field

[0001] The present invention relates to the field of motors, and in particular to a drive-control integrated motor. Background Art

[0002] The development of drive motors is increasingly moving towards low cost, miniaturization, light weight and integration. Integration is one of the basic ways to achieve miniaturization, light weight and low cost. Usually, the integration of drive motor systems is mainly achieved through the integration of motors and drive controllers.

[0003] This is different from the traditional state where the motor and drive controller are separated. The drive-control integrated motor integrates the power device, control device and motor stator into an integrated design and installation, so the motor structure, controller wiring and component arrangement will change significantly. At the same time, the motor and the drive affect each other, bringing challenges to the temperature rise, vibration and electromagnetic radiation disturbance of the entire system. In addition, motor products usually need to meet harsh environmental stress requirements such as high and low temperature operation, high and low temperature storage, low air pressure, vibration, impact, acceleration, and three protections. Therefore, for the drive-control integrated motor, it is necessary to focus on solving the problems of structural support, heat dissipation, anti-electromagnetic radiation disturbance and electrical connection that arise after the driver and motor are integrated. Summary of the invention

[0004] In response to the problems of structural support, heat dissipation, resistance to electromagnetic radiation disturbance and electrical connection that arise after the driver and motor are integrated into one, the present invention provides an integrated drive and control motor to simplify the installation procedure, modularize the structure, facilitate later maintenance, and / or improve the heat dissipation efficiency, suppress or eliminate external electromagnetic radiation and electromagnetic interference of external electromagnetic fields on the inside of the motor.

[0005] Technical solution: The drive-control integrated motor described in the present invention mainly includes a shell, a stator, a busbar circuit board, a cable, a heat dissipation base, a reel, a control circuit board, and a drive circuit board; the stator includes a winding and a plurality of lead-out wires electrically connected to the winding, and the lead-out wires are electrically connected to the control circuit board through the busbar circuit board and the cable; the control circuit board and the drive circuit board are spaced apart, and the spacing between the two is achieved by a limiting device; the control circuit board is electrically connected to the drive circuit board, and the outer cylindrical surfaces of the control circuit board and the drive circuit board are wrapped by a thin-walled reel, and the outer cylindrical surface of the reel is inserted into the inner cylindrical hole of the heat dissipation base; the limiting device is hollow, and the screw passes through the control circuit board, the limiting device, the drive circuit board and the thermal pad in turn, and is screwed into the bottom threaded hole of the heat dissipation base.

[0006] Furthermore, a plurality of pins or connecting cables are provided between the control circuit board and the driving circuit board, and both ends of the pins or the connecting cables are respectively plugged into or welded on the control circuit board and the driving circuit board to form an electrical connection.

[0007] Furthermore, the main bodies of multiple winding skeletons are embedded in the stator and extend from the middle of the stator to the end of the stator, forming a groove at the end of the stator; the lead-out wire head of the stator is introduced into the groove of the winding skeleton, one end of the puncture sheet has a slot and the other end is a thin end, and the slot ends of multiple puncture sheets are respectively inserted into the grooves of multiple winding skeletons, and the slot ends of the puncture sheets are electrically connected to the lead-out wire heads through pressure puncture inside the groove of the winding skeleton, and the thin end of the puncture sheet is welded to the pad of the bus circuit board and is electrically connected to the circuit on the bus circuit board.

[0008] Furthermore, the bus circuit board and the control circuit board are both provided with rectangular sockets, and both ends of the cable are provided with rectangular plugs, which are respectively inserted into the rectangular sockets on the bus circuit board and the control circuit board to achieve electrical connection.

[0009] Furthermore, the open end of the heat dissipation base is connected to the shell via an end cover, and the end cover has a hole for the cable to pass through.

[0010] Furthermore, the busbar circuit board is a printed circuit board on which are printed circuits that enable the windings to form a star connection or a delta connection.

[0011] Furthermore, the reel is formed by cutting and rolling the heat-resistant soft composite insulating material, or by rolling, integrally machining or stretching the conductive metal material, or by forming a multilayer composite structure of the heat-resistant soft composite insulating material and the conductive metal material.

[0012] Furthermore, the edges of the slot of the puncture sheet are sharp and have no chamfers.

[0013] Furthermore, the busbar circuit board is also provided with a Hall element for detecting the position of the motor rotor.

[0014] Furthermore, there are multiple cables, which are divided into different cables according to strong electricity and weak electricity; each of the cables includes multiple conductors; and the cables are flexible and bendable.

[0015] Furthermore, the barrel-shaped bottom of the heat sink base has a plurality of threaded hole bosses with internal threaded holes, and screws are screwed into the internal threaded holes to press the power tubes welded on the driving circuit board tightly against the bottom surface of the heat sink base; the threaded hole bosses are integrally processed and formed with the heat sink base, or a stud is screwed in, or a stud is welded as a split structure.

[0016] Furthermore, the barrel-shaped bottom of the heat dissipation base is also provided with a plurality of power tube bosses of a shape capable of covering the entire power tube area; the height of the power tube boss is smaller than the height of the threaded hole boss, and the power tube is tightly pressed against the end face of the power tube boss.

[0017] Furthermore, the thermal pad is located between the power tube and the heat sink base or between the power tube and the end face of the power tube boss; the thermal pad is made of a flexible, compressible material, and the thickness of the thermal pad is greater than the difference in height between the end face of the threaded hole boss and the bottom face of the heat sink base, or greater than the difference in height between the end face of the threaded hole boss and the end face of the power tube boss.

[0018] Furthermore, the contact surface between the heat dissipation base and the power tube or the end surface of the power tube boss is flat and smooth.

[0019] Furthermore, the limiting device is a sleeve sleeved on the screw rod; the bottom outer surface of the heat dissipation base is provided with heat dissipation grooves covering the entire outer bottom surface, and the heat dissipation grooves are symmetrical herringbone shapes.

[0020] Beneficial effects: Compared with the prior art, the present invention has the following advantages: On the one hand, the outer cylindrical surfaces of the control circuit board and the drive circuit board are wrapped by a thin-walled roll and then inserted into the inner cylindrical hole of the barrel-shaped heat dissipation base. When the heat-resistant and soft composite insulating material is cut and rolled into a roll, the control circuit board and the drive circuit board fixed by the screw can be supported to prevent over-positioning. When a roll or an integral sleeve made of conductive metal material is used, the electromagnetic interference of the external alternating magnetic field to the internal circuit board, components and connecting cables can be effectively shielded, and the radiation emission to the outside world generated by the motor stator, motor rotor, internal circuit board, components and connecting cables can also be reduced.

[0021] On the other hand, a puncture piece is inserted into the groove of the winding skeleton, and an electrical connection is achieved with the stator lead wire head pre-placed in the groove by puncture and crimping. At the same time, the other end of the puncture piece is welded to a busbar circuit board printed with a star connection or a triangle connection line. These two electrical connection methods are used to replace the traditional welding / crimping / lug connection of wires / cables, simplifying the manufacturing process, reducing process conditions, and improving reliability. Different layouts are printed on the busbar circuit board to achieve star or triangle connection of the motor stator winding, improving the versatility of the winding. At the same time, through the structural design of the puncture piece, it is designed to have a slot at one end, and the slot edges are sharp and without chamfers, which is more conducive to the electrical contact between the puncture piece and the lead wire head, preventing the problem of unstable electrical connection between the puncture piece and the winding lead wire during the operation of the motor, and ensuring a highly reliable electrical connection.

[0022] The drive-control integrated motor described in the present invention can realize miniaturization, integration and low cost of the drive-control integrated motor while ensuring reliable electrical connection, effective heat dissipation and reasonable structural support. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a cross-sectional view of a drive-control integrated motor according to an embodiment of the present invention;

[0024] Figure 2 An exploded view of a drive-control integrated motor according to an embodiment of the present invention;

[0025] Figure 3 is a schematic structural diagram of a stator according to an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of the structure of a puncture sheet according to an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the external structure of a heat dissipation base according to an embodiment of the present invention;

[0028] Figure 6 A schematic diagram of the internal structure of a heat dissipation base according to an embodiment of the present invention;

[0029] Figure 7 A schematic diagram of the structure of a thermally conductive pad according to an embodiment of the present invention;

[0030] Figure 8 The figure is a wiring schematic diagram of a busbar circuit board according to an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1-housing, 2-stator, 3-winding skeleton, 4-puncture plate, 5-bus circuit board, 6a-first rectangular socket, 6b-second rectangular socket, 7a-first rectangular plug, 7b-second rectangular plug, 8-end cover, 9a-high-voltage cable, 9b-low-voltage cable, 10-heat dissipation base, 11-reel, 12-control circuit board, 13-screw, 14-sleeve, 15-pin, 16-drive circuit board, 17-thermal pad, 18-power tube, 19-threaded hole boss, 20-heat dissipation groove, 21-power tube boss, 22-power tube boss end face. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail from four perspectives of electrical connection, structural support, electromagnetic shielding and power tube heat dissipation in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Figure 1 and Figure 2Shown are the cross-sectional view and three-dimensional exploded view of the drive-control integrated motor of the present invention. This structure can be applied to any type of motor.

[0034] like Figure 1 , Figure 2 As shown, the drive-control integrated motor mainly includes a shell 1, a stator 2, a winding frame 3, a piercing plate 4, a busbar circuit board 5, a rectangular socket, a rectangular plug, an end cover 8, a cable, a heat dissipation base 10, a reel 11, a control circuit board 12, and a drive circuit board 16.

[0035] The busbar circuit board 5 is a printed circuit board on which a line is printed that enables the winding to form a star connection or a triangle connection, thereby realizing the star or triangle connection of the motor stator 2 winding. Figure 4 As shown. The stator 2 includes a winding and a plurality of lead-out wire heads electrically connected to the winding; the main bodies of the plurality of winding bobbins 3 are embedded in the stator 2 and extend from the middle of the stator 2 to the end of the stator 2, forming a groove at the end of the stator 2; the lead-out wire heads of the stator 2 are introduced into the grooves of the winding bobbins 3, and the slot ends of the plurality of puncture pieces 4 are respectively inserted into the grooves of the plurality of winding bobbins 3, and the slot ends of the puncture pieces 4 are electrically connected to the lead-out wire heads of the stator 2 in the grooves of the winding bobbins 3 by pressure puncture, and the thin ends of the puncture pieces 4 are welded to the pads of the busbar circuit board 5 and are electrically connected to the circuits on the busbar circuit board 5.

[0036] The circuit printed on the busbar circuit board 5 is as follows Figure 8 As shown in the figure, U / V / W / X / Y / Z are multiple stator 2 lead ends transferred through the puncture piece 4. In the busbar circuit board 5, through different copper-clad routing, multiple connection methods of the motor winding can be realized more flexibly and conveniently. A Hall element can be installed on the busbar circuit board 5 to detect the position of the permanent magnetic ring installed on the motor rotor, thereby detecting the angle and speed of the motor rotor. The sharp edges of the slot of the puncture piece 4 without chamfering can ensure good electrical contact.

[0037] The bus circuit board 5 and the control circuit board 12 are provided with a first rectangular socket 6a and a second rectangular socket 6b, respectively. The two ends of the cable are provided with a first rectangular plug 7a and a second rectangular plug 7b, respectively. The first rectangular plug 7a and the second rectangular plug 7b at both ends of the cable are connected to the first rectangular socket 6a and the second rectangular socket 6b on the bus circuit board 5 and the control circuit board 12, respectively, so as to realize the electrical connection between the bus circuit board 5 and the control circuit board 12. The electrical connection inside the motor usually includes strong electricity, such as the U / V / W three-phase line of the motor, and weak electricity, such as the rotor position sensor signal line. Therefore, the number of cables is not limited to 1. Figure 1 and Figure 2In the embodiment shown, strong current and weak current are separated and routed through different cables, i.e. Figure 1 The high-voltage cable 9a and the low-voltage cable 9b, each of which may include multiple conductors; in addition, the cables are flexible and bendable. Since the control circuit board 12 is rigidly fixed and there are machining tolerances, the control circuit board 12 and the bus circuit board 5 may be assembled non-concentrically or non-parallel, and the flexible cable connection can reduce or eliminate the impact of this displacement deviation.

[0038] The control circuit board 12 and the drive circuit board 16 are spaced apart, and the spacing between the two is achieved by a limiting device, which is a sleeve 14 sleeved on the screw 13. A plug pin 15 or a connecting cable is also provided between the control circuit board 12 and the drive circuit board 16, and the two ends of the multiple plug pins or the connecting cable are respectively plugged or welded on the control circuit board (12) and the drive circuit board (16); the outer cylindrical surface of the control circuit board 12 and the drive circuit board 16 is wrapped by a thin-walled reel 11, and the outer cylindrical surface of the reel 11 is inserted into the inner cylindrical hole of the barrel-shaped heat dissipation base 10; the limiting device is hollow, and the screw 13 passes through the control circuit board 12, the limiting device, the drive circuit board 16 and the thermal pad 17 in sequence, and is screwed into the bottom threaded hole of the heat dissipation base 10;

[0039] The open end of the heat dissipation base 10 is connected to the shell 1 through an end cover 8, and the end cover 8 has a hole for the cables to pass through. The high-voltage cable 9a and the low-voltage cable 9b pass through the holes on the end cover 8 to connect the busbar circuit board 5 and the control circuit board 12.

[0040] The structural features of the reel 11 of this embodiment are used to achieve structural support and electromagnetic radiation interference protection inside the motor. Since the control circuit board 12 and the drive circuit board 16 are fixed by the long screw 13, the cantilever structure formed thereby needs to add auxiliary support. According to the needs, the reel 11 can be made of heat-resistant soft composite insulating material after cutting and rolling. This flexible reel 11 can play an auxiliary support role and prevent over-positioning. The reel 11 can also be made of conductive metal material rolling, integral machining or stretching. The conductive metal material can form a shielding effect on the control circuit board 12, drive circuit board 16, components, connecting cables, etc. inside it, which is conducive to reducing the radiation emission generated by the internal circuit board, components and connecting cables to the outside world, and at the same time weakening the electromagnetic interference of the external alternating magnetic field to the inside of the motor. The number of layers of the reel 11 is not limited to 1 layer, and a multi-layer composite structure can be formed by the above two different materials to ensure that the reel 11 has both electromagnetic shielding and soft auxiliary structural support.

[0041] This embodiment achieves heat dissipation of the power tube 18, the main heating element in the drive controller, through the following structures or features. The heat dissipation base 10 is a barrel-shaped structure, and the bottom of the barrel has multiple threaded bosses 19 with internal threaded holes. Figure 6 As shown, the power tube 18 is welded on the driving circuit board 16, and when the screw 13 is screwed into the internal threaded hole of the heat dissipation base 10, the power tube 18 is pressed against the bottom inner surface of the heat dissipation base 10 by tightening the screw 13. The power tube 18 is in direct contact with the bottom inner surface of the heat dissipation base 10, or a thermal pad 17 is provided between the power tube 18 and the bottom inner surface of the heat dissipation base 10 to dissipate heat by heat conduction.

[0042] Thermal pad 17 such as Figure 7 As shown, it has a high thermal conductivity, and the thermal pad 17 is flexible and compressible. The thickness of the thermal pad 17 is slightly larger than the height difference between the end face of the threaded hole boss 19 and the bottom surface of the heat sink base 10. This ensures that after tightening the screw 13, the thermal pad 17 is compressed, thereby generating pre-pressure on the contact surface, ensuring good heat conduction between the power tube 18, the thermal pad 17 and the bottom surface of the heat sink base 10.

[0043] The end face height of the threaded hole boss 19 exceeds the bottom face of the heat sink 10, so as to ensure that the copper wire of the bottom printed circuit board of the driver circuit board 16 will not directly contact the bottom face of the heat sink 10 and cause a short circuit fault. The threaded hole boss 19 and the heat sink 10 can be integrally processed or formed, or a separate structure such as screwing in studs or welding studs can be adopted.

[0044] The bottom surface of the heat sink 10 and the area in contact with the power tube 18 have a high degree of finish. These features can reduce thermal resistance and improve thermal conductivity. The outer bottom surface of the barrel-shaped heat sink 10 is provided with a heat sink 20. Figure 5 As shown, the heat dissipation grooves 20 cover all the outer bottom surfaces, and the heat dissipation grooves 20 are symmetrically distributed in a herringbone shape. The heat dissipation grooves 20 expand the area of ​​heat convection and heat radiation, thereby strengthening the heat dissipation of the motor.

[0045] In addition, multiple power tube bosses 21 with shapes that can cover the entire power tube area can also be set on the barrel-shaped bottom of the heat dissipation base 10. Figure 6 As shown in (b), the end face 22 of the power tube boss is flat and smooth to reduce thermal resistance and improve thermal conductivity; the height of the end face 22 of the power tube boss is less than the height of the end face of the threaded hole boss 19, and the power tube 18 welded on the driving circuit board 16 is pressed tightly on the end face 22 of the power tube boss, and heat is dissipated by heat conduction through the power tube boss 21. Alternatively, a thermal pad 17 with a thickness slightly greater than the difference between the end face of the threaded hole boss 19 and the end face 22 of the power tube boss is also provided between the power tube 18 and the end face 22 of the power tube boss.

[0046] The above embodiments are preferred implementation modes of the present invention, but the present invention is not limited to the above embodiments. Any obvious improvements, substitutions or modifications that can be made by those skilled in the art without departing from the essential content of the present invention belong to the protection scope of the present invention.

Claims

1. A drive-control integrated motor, characterized in that: The invention mainly comprises a housing (1), a stator (2), a busbar circuit board (5), a cable, a heat dissipation base (10), a reel (11), a control circuit board (12), and a drive circuit board (16); the stator (2) comprises a winding and a plurality of lead-out wires electrically connected to the winding, the lead-out wires being electrically connected to the control circuit board (12) through the busbar circuit board (5) and the cable; the control circuit board (12) and the drive circuit board (16) are spaced apart, and the space between the two is realized by a limiting device. The control circuit board (12) is electrically connected to the drive circuit board (16); the outer cylindrical surfaces of the control circuit board (12) and the drive circuit board (16) are wrapped by a thin-walled roll (11); the outer cylindrical surface of the roll (11) is inserted into the inner cylindrical hole of the heat dissipation base (10); the limit device is hollow, and the screw (13) passes through the control circuit board (12), the limit device, the drive circuit board (16) and the thermal pad (17) in sequence, and is then screwed into the bottom threaded hole of the heat dissipation base (10).

2. The drive-control integrated motor according to claim 1, characterized in that: A plurality of plug pins (15) or connecting cables are also provided between the control circuit board (12) and the drive circuit board (16), and two ends of the plug pins (15) or the connecting cables are respectively plugged or welded on the control circuit board (12) and the drive circuit board (16) to form an electrical connection.

3. The drive-control integrated motor according to claim 1, characterized in that: The main bodies of a plurality of winding skeletons (3) are embedded in the stator (2) and extend from the middle of the stator (2) to the end of the stator (2), forming a groove at the end of the stator (2); the lead-out wire head of the stator (2) is introduced into the groove of the winding skeleton (3); one end of the puncture piece (4) is provided with a slot and the other end is a thin end; the slot ends of the plurality of puncture pieces (4) are respectively inserted into the grooves of the plurality of winding skeletons (3); the slot ends of the puncture pieces (4) are electrically connected to the lead-out wire head in the groove of the winding skeleton (3) by pressure puncture; the thin end of the puncture piece (4) is welded to the pad of the busbar circuit board (5) and is electrically connected to the circuit on the busbar circuit board (5).

4. The drive-control integrated motor according to claim 1, characterized in that: The busbar circuit board (5) and the control circuit board (12) are both provided with rectangular sockets (6), and both ends of the cable are provided with rectangular plugs (7), and the rectangular plugs (7) are respectively inserted into the rectangular sockets (6) on the busbar circuit board (5) and the control circuit board (12) to achieve electrical connection.

5. The drive-control integrated motor according to claim 1, characterized in that: The open end of the heat dissipation base (10) is connected to the housing (1) via an end cover (8), and the end cover (8) has a hole for the cable to pass through.

6. The drive-control integrated motor according to claim 1, characterized in that: The busbar circuit board (5) is a printed circuit board on which are printed circuits that enable the windings to form a star connection or a delta connection.

7. The drive-control integrated motor according to claim 1, characterized in that: The reel (11) is formed by cutting and rolling a heat-resistant soft composite insulating material, or by rolling, integrally machining or stretching a conductive metal material, or by forming a multilayer composite structure of a heat-resistant soft composite insulating material and a conductive metal material.

8. The drive-control integrated motor according to claim 3, characterized in that: The edges of the slot of the puncture piece (4) are sharp and have no chamfers.

9. The drive-control integrated motor according to claim 1, characterized in that: The busbar circuit board (5) is also provided with a Hall element for detecting the position of the motor rotor.

10. The drive-control integrated motor according to claim 1, characterized in that: There are multiple cables, which are divided into different cables according to strong electricity and weak electricity; each cable includes multiple conductors; and the cables are flexible and bendable.

11. The drive-control integrated motor according to claim 1, characterized in that: The barrel-shaped bottom of the heat dissipation base (10) has a plurality of threaded hole bosses (19) with internal threaded holes, and the screws (13) are screwed into the internal threaded holes to press the power tubes (18) welded on the driving circuit board (16) against the bottom surface of the heat dissipation base (10); the threaded hole bosses (19) and the heat dissipation base (10) are integrally processed and formed, or a stud is screwed in, or a stud is welded as a separate structure.

12. The drive-control integrated motor according to claim 11, characterized in that: The barrel-shaped bottom of the heat dissipation base (10) is also provided with a plurality of power tube bosses (21) of a shape capable of covering the entire area of ​​the power tube (18); the height of the power tube boss (21) is smaller than the height of the threaded hole boss (19), and the power tube (18) is tightly pressed against the end surface (22) of the power tube boss.

13. The drive-control integrated motor according to claim 12, characterized in that: The thermal pad (17) is located between the power tube (18) and the heat dissipation base (10) or between the power tube (18) and the end face (22) of the power tube boss; the thermal pad (17) is made of a flexible and compressible material, and the thickness of the thermal pad (17) is greater than the difference in height between the end face of the threaded hole boss (19) and the bottom face of the heat dissipation base (10), or greater than the difference in height between the end face of the threaded hole boss (19) and the end face (22) of the power tube boss.

14. The drive-control integrated motor according to claim 12, characterized in that: The contact surface between the heat dissipation base (10) and the power tube (18) or the end surface (22) of the power tube boss is flat and smooth.

15. The drive-control integrated motor according to claim 1, characterized in that: The limiting device is a sleeve (14) sleeved on the screw rod (13); a heat dissipation groove (20) covering the entire outer bottom surface is provided on the bottom outer surface of the heat dissipation base (10); the heat dissipation groove (20) is in a symmetrical herringbone shape.

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