A motor with a hybrid excitation salient pole rotor structure and its production process

Abstract

The present invention relates to the technical field of motors for new energy vehicles, and in particular to a motor with a hybrid excitation salient pole rotor structure and its production process, wherein the motor comprises a stator and a rotor, wherein the stator comprises a stator core and a flat wire winding, and the flat wire winding is wound on the stator core; the rotor is arranged in the stator, and the rotor comprises a rotor core, an electric excitation winding and a damping copper bar, wherein the rotor core is arranged in the inner hole of the stator core, and a rotor pole is arranged on the rotor core, and the electric excitation winding is wound on the rotor pole, and a damping hole is arranged on the rotor pole, and the damping copper bar is located in the damping hole. The flat wire winding of the present invention can provide a magnetic field more flexibly at low speed, and the flat wire winding can provide a magnetic field more flexibly at low speed, and the electric excitation winding can further reduce excitation more accurately at high speed, optimize more energy consumption, and improve the comprehensive endurance rate, and the damping copper bar can meet the electrical load during impact, and reduce system oscillation, and improve system stability.

Description

Technical Field

[0001] The present invention relates to the technical field of motors for new energy vehicles, and in particular to a motor with a hybrid excitation salient pole rotor structure and a production process thereof. Background Art

[0002] Compared with permanent magnet motors, electric excitation motors can obtain better starting torque by increasing excitation at low speeds, and can also adjust the additional loss of weak magnetic current at high speeds. Therefore, although its maximum efficiency and high-efficiency area ratio are not as good as permanent magnet motors, its comprehensive energy consumption performance under WLTC conditions is the same as that of permanent magnet motors. At the same time, because its rotor is an excitation winding, it does not require rare earth materials, which has certain advantages in motor cost and environmental protection.

[0003] At present, electrically excited synchronous motors are less used in the domestic new energy vehicle industry, while permanent magnet synchronous motors are more used, but both have their own advantages at different vehicle speeds. At low speeds, permanent magnet synchronous motors are highly efficient and have a large proportion of high efficiency areas; at high speeds, electrically excited synchronous motors have lower energy consumption. As the new energy industry has increasingly strong requirements for energy consumption and efficiency, hybrid excitation synchronous motors that combine electrically excited windings with permanent magnets have been favored by many foreign companies in recent years.

[0004] However, how to combine permanent magnet synchronous motors with electrically excited synchronous motors to overcome the low and high speed disadvantages of the two motors has become an urgent problem to be solved. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in order to solve the technical problems in the prior art, the present invention provides a motor with a hybrid excitation salient pole rotor structure and a production process thereof. The rotor of the hybrid excitation synchronous motor has both an electric excitation winding and a permanent magnet, which can reduce the excitation loss at low speeds and reduce or even eliminate the need for excitation current at high speeds, thereby further improving the overall efficiency and increasing the overall endurance.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a motor with a hybrid excitation salient pole rotor structure, comprising a stator, the stator comprising a stator core and a flat wire winding, the flat wire winding being wound on the stator core, and the stator core having an inner hole; a rotor, the rotor being arranged in the stator, the rotor comprising a rotor core, an electric excitation winding and a damping copper bar, the rotor core being arranged in the inner hole of the stator core, the rotor core being provided with a rotor pole, a plurality of the rotor poles being arranged along the circumference of the rotor, the electric excitation winding being wound on the rotor pole, the rotor pole being provided with a damping hole, and the damping copper bar being located in the damping hole.

[0007] The present invention provides an electric motor with a hybrid excitation salient pole rotor structure. The flat wire winding can provide a magnetic field more flexibly at low speed, and the electric excitation winding can further reduce the excitation more accurately at high speed, optimize more energy consumption, and improve the comprehensive endurance rate. The damping copper bar can meet the electrical load during impact, reduce system oscillation, and improve system stability.

[0008] Furthermore, the rotor core is provided with iron end rings at both ends along its axial direction, and the iron end rings are connected to both ends of the damping copper bar.

[0009] Through the above technical solution, the connection of the damping copper strip is facilitated by two iron end rings, and short-circuiting is also facilitated.

[0010] Furthermore, a pole shoe is provided on the rotor pole, and a magnetic steel is provided inside the pole shoe.

[0011] Furthermore, each of the rotor poles is provided with two pole shoes, which are arranged to be inclined relative to each other so that the two pole shoes are in a V shape, and the two magnets on the same rotor pole are opposite poles.

[0012] Through the above technical solution, the combination of V-shaped magnets and salient pole rotors is adopted, and the rotor structure is more stable. Moreover, due to the inclined arrangement of the two magnets, the inconsistent characteristics of their AC and DC axis inductance can be utilized to enable the motor to have a higher speed and power density. Through the parametric multi-objective optimization of the magnet shape, angle, and damping strips, excellent energy consumption and NVH performance are obtained, and the noise and vibration of the machine are reduced.

[0013] Furthermore, a weight-reducing hole is provided on the rotor pole, and the weight-reducing hole is located between the pole shoe and the damping hole.

[0014] Furthermore, a groove is formed between adjacent rotor poles, the electric excitation winding is located in the groove, and the contact portion between the electric excitation winding and the rotor lamination core is provided with insulating paper.

[0015] Furthermore, the flat wire winding adopts a distributed short-pitch flat wire winding, and an iron core tooth is provided on the inner wall of the stator iron core along its own axial direction. There are a plurality of the iron core teeth in a circumferential array along the stator iron core, and tooth slots are formed between adjacent iron core teeth. The distributed short-pitch flat wire winding is located in the tooth slots and is wound around the iron core teeth.

[0016] Furthermore, pressure stop plates are respectively provided at both ends of the stator core, and the pressure stop plates abut against the ends of the stator core.

[0017] A production process, based on the above-mentioned motor with a hybrid excitation salient pole rotor structure, comprises the following steps:

[0018] Stator processing steps: obtain stator punching sheets by stamping, stack and weld the stator punching sheets to form a stator core, insert insulation paper into the stator core, and then install flat wire windings on the insulation paper;

[0019] Rotor processing steps: obtain rotor punchings by stamping, stack and weld the rotor punchings to form a rotor core, wind flat wire windings on the rotor poles on the rotor core, and install the damping copper bars in the damping holes of the rotor core;

[0020] Assembly steps: Install the rotor core into the stator core.

[0021] Furthermore, in the stator processing step, when installing the flat wire winding on the stator core, the flat wire winding is first inserted into the stator core and press-fitted. After the press-fitting is completed, the head is twisted and expanded, and the connection of the flat wire winding is laser welded. After the welding is completed, insulating paint is applied and dripped, and the winding insulation is tested after the insulating paint is cured.

[0022] The beneficial effects of the present invention are:

[0023] 1. Flat wire windings can provide magnetic fields more flexibly at low speeds, while electric excitation windings can further reduce excitation more accurately at high speeds, optimize more energy consumption, and improve comprehensive endurance. The damping copper bar can meet the electrical load during impact, reduce system oscillations, and improve system stability.

[0024] 2. The combination of V-shaped magnets and salient-pole rotors makes the rotor structure more stable. The two magnets are tilted and the inconsistent inductance between the AC and DC axes can enable the motor to have a higher speed and power density. Through the parametric multi-objective optimization of the magnet shape, angle, and damping strips, excellent energy consumption and NVH performance are achieved, reducing the noise and vibration of the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 It is a schematic diagram of the exploded structure of an entire motor with a hybrid excitation salient pole rotor structure embodied in the present invention.

[0027] Figure 2 It is a schematic diagram of the overall top view of a motor with a hybrid excitation salient pole rotor structure embodied in the present invention.

[0028] Figure 3 It is a schematic diagram of the stator core in the present invention.

[0029] Figure 4 It is a schematic diagram of a rotor core in the present invention.

[0030] Figure 5 It is a schematic diagram of the iron end ring in the present invention.

[0031] Figure 6 It is a schematic diagram of the damping copper strip assembly device of the present invention.

[0032] Figure 7 It is a schematic diagram of the clamping tooling in the present invention.

[0033] Figure 8 It is a schematic diagram of the shearing assembly in the present invention.

[0034] Fig. 9 It is a schematic diagram of the assembly components in the present invention.

[0035] Fig.10 It is a cross-sectional schematic diagram of the locking rod and the ball in the present invention.

[0036] In the figure: 1. stator core; 11. inner hole; 12. flat wire winding; 13. pressure stop plate; 14. tooth slot; 15. core teeth; 2. rotor core; 21. electric excitation winding; 22. damping copper bar; 23. rotor pole; 231. damping hole; 232. pole shoe; 233. weight reduction hole; 24. iron end ring; 241. welding groove; 25. groove; 26. magnetic steel; 3. frame; 31. turntable; 32. clamping tool; 321. first cylinder; 322. moving plate; 323. clamping cylinder; 3231. clamping hole; 324. guide rod; 3241. slider; 3242. limit step; 3243. clamping hole; 325. second cylinder; 326. top plate ; 327, push rod; 328, clamping rod; 3281, ball; 329, second drive motor; 3291, second gear; 3292, third gear; 33, shearing station; 34, assembly station; 35, welding station; 4, shearing assembly; 41, shearing frame; 42, fixed cylinder; 421, stabilizing cylinder; 4211, guide hole; 43, rotating cylinder; 431, positioning hole; 432, shearing blade; 44, hydraulic cylinder; 441, first gear; 442, rack; 5, assembly assembly; 51, assembly frame; 52, third cylinder; 53, fixed plate; 54, moving rod; 55, assembly plate; 551, assembly rod; 56, compression spring; 6, welding assembly. DETAILED DESCRIPTION

[0037] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The invention discloses a motor with a hybrid excitation salient pole rotor structure and a production process thereof.

[0040] Reference Figures 1 to 5 A motor with a hybrid excitation salient pole rotor structure includes a stator and a rotor arranged in the stator. The stator includes a stator core 1 and a flat wire winding 12. The flat wire winding 12 is wound on the stator core 1. The stator core 1 has an inner hole 11. The rotor includes a rotor core 2, an electric excitation winding 21 and a damping copper bar 22. The rotor core 2 is arranged in the inner hole 11 of the stator core 1. The rotor core 2 is provided with a rotor pole 23. The rotor pole 23 is provided with a plurality of rotor poles along the circumference of the rotor. The electric excitation winding 21 is wound on the rotor pole 23. The rotor pole 23 is provided with a damping hole 231. The damping copper bar 22 is located in the damping hole 231. The rotor core 2 adopts a salient pole rotor.

[0041] Specifically, the rotor core 2 is provided with iron end rings 24 at both ends along its own axial direction, and the iron end rings 24 are connected to both ends of the damping copper strip 22. Each iron end ring 24 is provided with a welding groove 241, which is semi-cylindrical and used for the damping copper strip 22, and the welding groove 241 is used for welding with the damping copper strip 22 along its own circumferential sides. In this embodiment, there are 6 rotor poles 23, and the number of damping copper strips 22 is 42, that is, each rotor pole 23 has 7 damping copper strips 22. The damping copper strip 22 is cylindrical, with a diameter of 9 mm, and a damping hole diameter of 9.5 mm. The number of damping holes 231 on each rotor pole 23 is 7, and the slot pitch angle between adjacent damping holes 231 is 6°, which is the angle between the damping hole 231 and the line connecting the center of the rotor core 2.

[0042] Each rotor pole 23 and iron end ring 24 is also provided with a weight-reducing hole 233 . The weight-reducing hole 233 is located between the pole shoe 232 and the damping hole 231 . The diameter of the weight-reducing hole 233 may be 21 mm.

[0043] Each rotor pole 23 is provided with two pole shoes 232, each pole shoe 232 is inserted with a magnet 26, and the two pole shoes 232 are relatively inclined so that the two pole shoes 232 are V-shaped with an angle of 93°. The two magnets 26 on the same rotor pole 23 are opposite poles.

[0044] A groove 25 is formed between adjacent rotor poles 23 , and the excitation winding 21 is located in the groove 25 . The contact portion between the excitation winding 21 and the rotor lamination core is provided with insulating paper.

[0045] In this embodiment, the flat wire winding 12 can adopt a 72-slot six-pole distributed short-distance flat wire winding, whose span is 10. The inner wall of the stator core 1 is provided with core teeth 15 along its own axial direction. There are several core teeth 15 along the circumferential array of the stator core 1. Tooth slots 14 are formed between adjacent core teeth 15. The distributed short-distance flat wire winding 12 is located in the tooth slots 14 and wound on the core teeth 15. Insulating paper is provided on the side wall of the core teeth 15 to separate the distributed short-distance flat wire winding from the stator core 1. Pressure stop plates are provided at both ends of the stator core 1. The pressure stop plates are used to press the stator core 1 and can separate the ends of the stator core 1 from the distributed short-distance flat wire winding.

[0046] A production process, based on the above-mentioned motor with a hybrid excitation salient pole rotor structure, comprises the following steps:

[0047] Stator processing steps: obtain stator punching sheets by stamping, stack and weld the stator punching sheets to form a stator core 1, then press the stator core 1 by two stop plates, and then install the flat wire winding 12 on the stator core 1. In the stator processing steps, when installing the flat wire winding 12 on the stator core 1, first insert the formed insulating paper into the tooth slot 14 and stick it on the side wall of the core tooth 15, then insert the flat wire winding 12 into the tooth slot 14 and press it, after the press is completed, twist and expand the flat wire winding 12, weld the welding points of the flat wire winding 12, and then apply and drip insulating paint, and perform winding insulation inspection after the insulating paint is cured.

[0048] Rotor processing steps: obtain rotor punchings by stamping, and stack and weld the rotor punchings to form the rotor core 2. After inserting the magnetic steel 26 into the rotor core 2, use two iron end rings 24 to press the rotor core 2, then insert the damping copper bar 22, and automatically laser weld the damping copper bar 22 and the iron end ring 24. When inserting the damping copper bar 22 and welding the damping copper bar 22, use the damping copper bar 22 assembly device. Then, stick insulating paper on the part of the rotor core 2 that needs to contact the electric excitation winding 21, that is, on the side wall of the rotor stimulation, and then wind the flat wire winding 12 on the insulating paper of the rotor pole 23.

[0049] Assembly steps: Install the rotor core 2 into the stator core 1.

[0050] Reference Figures 6 to 10 The assembly device of the damping copper strip 22 includes a rotating assembly, a shearing assembly 4, an assembling assembly 5 and a welding assembly 6. The rotating assembly includes a frame 3, a first driving motor and a turntable 31. The first driving motor is fixedly mounted on the frame 3. The output end of the first driving motor is arranged in the vertical direction and is fixedly connected to the turntable 31 to drive the turntable 31 to rotate. The turntable 31 is provided with a clamping fixture 32 for clamping a workpiece. The frame 3 is provided with a shearing station 33, an assembling station 34 and a welding station 35 along its own circumference, which are respectively used to correspond to the shearing assembly 4, the assembling assembly 5 and the welding assembly 6.

[0051] During operation, the shearing assembly 4 is used to cut the damping copper bar 22 into the required length, the clamping tool 32 is used to clamp the damping copper bar 22 cut to the required length on the shearing station 33, and rotate it to the assembly station 34 through the turntable 31, and then cooperate with the assembly assembly 5 to assemble two iron end rings 24 and a rotor core 2 with the damping copper bar 22, and then the turntable 31 transfers the clamping tool 32 to the welding station 35, and the welding assembly 6 welds the damping copper bar 22 to the iron end ring 24.

[0052] Specifically, the shearing assembly 4 includes a shearing frame 41, a fixed cylinder 42 and a rotating cylinder 43. The shearing frame 41 is fixedly connected to the frame 3, the fixed cylinder 42 is fixedly connected to the shearing frame 41, and the rotating cylinder 43 is rotatably connected to the shearing frame 41. The fixed cylinder 42 is arranged at one end of the rotating cylinder 43 away from the turntable 31. The fixed cylinder 42 is provided with a transmission hole along its own axial direction, and the rotating cylinder 43 is provided with a positioning hole 431 along its own axial direction. The number, distribution position, shape and size of the transmission holes and the positioning holes 431 are the same as those of the damping holes 231 on the rotor core 2. The damping copper strip 22 is transferred to the transmission hole by the previous process, and passes through the transmission hole and the positioning hole 431, that is, a part of the damping copper strip 22 is exposed outside the rotating cylinder 43. A shearing blade 432 is fixedly connected to one end of the rotating cylinder 43 facing the fixed cylinder 42, and the shearing blade 432 is arranged in contact with the end surface of the fixed cylinder 42 facing the rotating cylinder 43. There are a number of shear blades 432 arranged in a circumferential array along the rotating drum 43, and the number of shear blades 432 is the same as the number of rotor poles 23, so that each shear blade 432 can cut off the seven damping copper bars 22 on one rotor pole 23. The shear blades 432 are arranged to be inclined relative to the radial direction of the rotating drum 43 to increase the shearing force. A hydraulic cylinder 44 is fixedly connected to the frame 3, and the piston rod of the hydraulic cylinder 44 is arranged in a vertical direction and is fixedly connected to a rack 442. A first gear 441 is coaxially fixedly connected to the side wall of the rotating drum 43, and the first gear 441 is meshed with the rack 442.

[0053] During shearing, after the damping copper strip 22 is fed through the previous process, the hydraulic cylinder 44 drives the rack 442 to move, the rack 442 drives the first gear 441 and the rotary drum 43 to rotate, and the rotary drum 43 drives the shear blade 432 to rotate, thereby cutting the damping copper strip 22 into the required length. The length of each feeding of the damping copper strip 22 is the length that the damping copper strip 22 needs to be cut into.

[0054] It should be noted that a stabilizing cylinder 421 is fixedly connected to the side wall of the fixing cylinder 42 facing the rotating cylinder 43 , and a stabilizing hole for inserting the stabilizing cylinder 421 is provided in the rotating cylinder 43 to improve the rotation stability of the rotating cylinder 43 .

[0055] The clamping tool 32 includes a first cylinder 321, a moving plate 322 and a clamping cylinder 323. The first cylinder 321 is fixedly connected to the turntable 31. The piston rod of the first cylinder 321 is arranged along the radial direction of the turntable 31 and is fixedly connected to the moving plate 322. The clamping cylinder 323 is rotatably connected to the moving plate 322. The clamping cylinder 323 is provided with clamping holes 3231 along its own axial direction. The number, distribution position and shape of the clamping holes 3231 are the same as those of the damping holes 231 on the rotor core 2, so as to allow the damping copper bar 22 to be inserted. The size of the clamping holes 3231 is slightly smaller than that of the damping copper bar 22, so that a transition fit or interference fit is formed between the damping copper bar 22 and the clamping holes 3231, thereby making a certain friction between the damping copper bar 22 and the clamping holes 3231, and the friction is greater than the friction between the damping copper bar 22 and the positioning hole 431.

[0056] During operation, the clamping fixture 32 rotates to the shearing station 33, and the piston rod of the first cylinder 321 pushes the moving frame to move, driving the clamping cylinder 323 to move toward the rotating cylinder 43, so that the part of the damping copper strip 22 exposed outside the rotating cylinder 43 is inserted into the clamping hole 3231, and then the piston rod of the first cylinder 321 is reset, so that the damping copper strip 22 is separated from the rotating cylinder 43. A guide rod 324 is fixedly connected to the end surface of the clamping cylinder 323, and a guide hole 4211 for inserting the guide rod 324 is provided on the end surface of the stabilizing cylinder 421, so as to prevent the guide rod 324 from interfering with the stabilizing cylinder 421 when the clamping cylinder 323 moves toward the rotating cylinder 43. At the same time, the cooperation between the guide rod 324 and the guide hole 4211 can improve the stability of the movement of the clamping cylinder 323. The length of the guide rod 324 is greater than the length of the damping copper bar 22 exposed from the rotating cylinder 43 , that is, the damping copper bar 22 will be inserted into the clamping hole 3231 only after the guide rod 324 is inserted into the guide hole 4211 , which can facilitate the alignment of the damping copper bar 22 and the clamping hole 3231 .

[0057] The assembly component 5 includes an assembly frame 51, a third cylinder 52 and a fixed plate 53. The assembly frame 51 is fixedly connected to the frame 3. The third cylinder 52 is fixedly connected to the assembly frame 51. The piston rod of the third cylinder 52 is fixedly connected to the fixed plate 53. A moving rod 54 is fixedly connected to the fixed plate 53. The end of the moving rod 54 away from the fixed plate 53 is slidably connected to the assembly plate 55. An assembly rod 551 is fixedly connected to the assembly. At least two assembly rods 551 are provided, which are used to be inserted into the weight reduction hole 233 so as to limit the two iron end rings 24 and a rotor core 2. A compression spring 56 is sleeved on the moving rod 54. One end of the compression spring 56 abuts against the fixed plate 53, and the other end abuts against the assembly plate 55. An anti-slip structure is provided between the moving rod 54 and the assembly plate 55 to prevent the moving rod 54 from being completely separated from the fixed plate 53.

[0058] The clamping tooling 32 also includes a second cylinder 325, a top plate 326 and a push rod 327. The second cylinder 325 is fixedly connected to the movable plate 322. The piston rod of the second cylinder 325 is fixedly connected to the top plate 326. The push rod 327 is fixedly connected to the top plate 326. The number and position of the push rod 327 are the same as those of the clamping hole 3231 so as to push out the damping copper strip 22 in the clamping hole 3231. A clamping rod 328 is also fixedly connected to the top plate 326. A clamping hole 3243 is provided in the guide rod 324 for inserting the clamping rod 328. A slide groove is provided on the side wall of the clamping hole 3243 along its radial direction. A slider 3241 is slidably connected in the slide groove. Two groups of sliders 3241 are provided along the axial direction of the guide rod 324. Two sliders 3241 are provided in each group along the circumferential direction of the clamping hole 3243. Each slider 3241 can contact an iron end ring 24 and the inner wall of the rotor core 2 at the same time to lock the iron end ring 24 and the rotor core 2. A ball 3281 is fixedly connected to the side wall of the clamping rod 328. Two groups of balls 3281 are provided, corresponding to the two groups of sliders 3241 respectively. When the piston rod of the second cylinder 325 is extended, the ball 3281 moves to abut against the slider 3241, thereby pushing the slider 3241 to move in a direction away from the axis of the clamping hole 3243, so that it can contact the inner wall of the iron end ring 24 and the rotor core 2. The end of the clamping cylinder 323 away from the first cylinder 321 is fixedly connected to the limiting step 3242, the diameter of the limiting step 3242 is smaller than the minimum distance between the axis of the clamping cylinder 323 and the clamping hole 3231, and the limiting step 3242 is used to abut against the end ring. The clamping rod 328 is cylindrical, so that when the clamping cylinder 323 rotates, the guide rod 324 can rotate relative to the clamping rod 328 and the ball 3281.

[0059] The welding assembly 6 can use a five-axis welding robot to automatically weld the iron end ring 24 and the damping copper strip 22. The clamping fixture 32 also includes a second drive motor 329, a second gear 3291 and a third gear 3292. The second drive motor 329 is fixedly connected to the moving plate 322, the output end of the second drive motor 329 is coaxially fixedly connected to the second gear 3291, the third gear 3292 is coaxially fixedly connected to the clamping cylinder 323, and the second gear 3291 is meshed with the third gear 3292.

[0060] During operation, after the damping copper strip 22 is fed through the previous process, the hydraulic cylinder 44 drives the rack 442 to move, the rack 442 drives the first gear 441 and the rotary drum 43 to rotate, and the rotary drum 43 drives the shear blade 432 to rotate, thereby cutting the damping copper strip 22 into the required length.

[0061] Subsequently, the clamping tool 32 is rotated to the shearing station 33, and the piston rod of the first cylinder 321 pushes the movable frame to move, driving the clamping cylinder 323 to move toward the rotating cylinder 43, so that the part of the damping copper strip 22 exposed outside the rotating cylinder 43 is inserted into the clamping hole 3231, and then the piston rod of the first cylinder 321 is reset to separate the damping copper strip 22 from the rotating cylinder 43.

[0062] Then, the clamping tool 32 is rotated to the assembly station 34, and the piston rod of the third cylinder 52 pushes the fixed plate 53 to move, and the two iron end rings 24 and a rotor core 2 move toward the clamping cylinder 323, so that the damping copper bar 22 exposed outside the clamping cylinder 323 is inserted into the rotor core 2 and the iron end ring 24, and at the same time, the guide rod 324 is also inserted into the rotor core 2 and the iron end ring 24 until one of the iron end rings 24 abuts against the limit step 3242. At this time, the piston rod of the second cylinder 325 extends, driving the top plate 326 and the top rod 327 to move, and the top rod 327 is inserted into the clamping hole 3231, and the damping copper strip 22 is pushed out from the clamping hole 3231, and the two ends of the damping copper strip 22 are respectively located in the two iron end rings 24. At this time, the top plate 326 abuts against the clamping cylinder 323, and the ball 3281 also contacts the slider 3241, so that each slider 3241 contacts the inner wall of the iron end ring 24 and the rotor core 2 at the same time, thereby locking the iron end ring 24 and the rotor core 2. Then the piston rod of the third cylinder 52 is reset to separate the assembly rod 551 from the weight reduction hole 233.

[0063] Finally, the clamping tool 32 is rotated to the welding station 35, and the five-axis welding robot welds the iron end ring 24 and the damping copper strip 22. During welding, the second drive motor 329 drives the second gear 3291 to rotate, and the second gear 3291 drives the third gear 3292 to rotate, thereby driving the clamping cylinder 323 to rotate, thereby facilitating the five-axis welding robot to weld different damping copper strips 22.

[0064] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A production process for producing a motor having a hybrid excitation salient pole rotor structure, the motor having a hybrid excitation salient pole rotor structure comprising a stator and a rotor, the stator comprising a stator core (1) and a flat wire winding (12), the flat wire winding (12) being wound on the stator core (1), the stator core (1) having an inner hole (11); the rotor being arranged in the stator, the rotor comprising a rotor core (2), an electric excitation winding (21) and a resistor The invention relates to a stator core (1) and a rotor core (2). The rotor core (2) is arranged in an inner hole (11) of a stator core (1). The rotor core (2) is provided with a rotor magnetic pole (23). A plurality of rotor magnetic poles (23) are arranged along the circumference of the rotor. The electric excitation winding (21) is wound on the rotor magnetic pole (23). A damping hole (231) is provided on the rotor magnetic pole (23). The damping copper strip (22) is located in the damping hole (231). The invention is characterized in that: The steps include: The stator processing steps include: obtaining stator punching sheets by stamping, laminating and welding the stator punching sheets to form a stator core (1), inserting insulating paper into the stator core (1), and then installing a flat wire winding (12) on the insulating paper; The rotor processing steps include: obtaining rotor punchings by stamping, laminating and welding the rotor punchings to form a rotor core (2), winding a flat wire winding (12) on a rotor magnetic pole (23) on the rotor core (2), and installing a damping copper bar (22) in a damping hole (231) of the rotor core (2); When inserting the damping copper bar and welding the damping copper bar, a damping copper bar assembly device is used, the damping copper bar assembly device includes a rotating assembly, a shearing assembly, an assembly assembly and a welding assembly, the rotating assembly includes a frame, a first driving motor and a turntable, the first driving motor is fixedly mounted on the frame, the output end of the first driving motor is arranged in a vertical direction, and is fixedly connected to the turntable to drive the turntable to rotate; The rotary table is provided with a clamping fixture for clamping the workpiece, and the frame is provided with a shearing station, an assembly station and a welding station along its circumference, which are respectively used for corresponding shearing components, assembly components and welding components; The shearing assembly comprises a shearing frame, a fixed cylinder and a rotating cylinder, wherein the shearing frame is fixedly connected to the frame, the fixed cylinder is fixedly connected to the shearing frame, the rotating cylinder is rotatably connected to the shearing frame, and the fixed cylinder is arranged at one end of the rotating cylinder away from the turntable; the fixed cylinder is provided with a transmission hole along its own axial direction, and the rotating cylinder is provided with a positioning hole along its own axial direction, and the number, distribution position, shape and size of the transmission holes and the positioning holes are the same as the damping holes on the rotor core; The damping copper strip is transferred to the transmission hole by the previous process, and passes through the transmission hole and the positioning hole, that is, a part of the damping copper is exposed outside the rotating cylinder. A shearing blade is fixedly connected to one end of the rotating cylinder facing the fixed cylinder. The shearing blade is arranged in contact with the end surface of the fixed cylinder facing the rotating cylinder. There are a number of shearing blades along the circumferential array of the rotating cylinder. The number of the shearing blades is the same as the number of the rotor poles, so that each shearing blade can cut off the damping copper strip on a rotor pole. The shearing blade is arranged to be inclined relative to the radial direction of the rotating cylinder to increase the shearing force. A hydraulic cylinder is fixedly connected to the frame, and the piston rod of the hydraulic cylinder is arranged in the vertical direction and is fixedly connected to a rack. A first gear is coaxially fixedly connected to the side wall of the rotating cylinder, and the first gear is meshed with the rack. Assembly steps: Install the rotor core (2) into the stator core (1).

2. A production process according to claim 1, characterized in that: In the stator processing steps, when installing the flat wire winding (12) on the stator core (1), the flat wire winding (12) is first inserted into the stator core (1) and press-fitted, and after the press-fitting is completed, the head is twisted and expanded, and the connection of the flat wire winding (12) is laser welded, and after the welding is completed, the insulating paint is applied and dripped, and the winding insulation test is performed after the insulating paint is cured.

3. A motor with a hybrid excitation salient pole rotor structure, characterized in that: The method is produced by the production process described in claim 1 or 2.

4. The motor with a hybrid excitation salient pole rotor structure according to claim 3, characterized in that: The rotor core (2) is also provided with iron end rings (24) at both ends along its own axial direction, and the iron end rings (24) are connected to both ends of the damping copper bar (22).

5. The motor with a hybrid excitation salient pole rotor structure according to claim 3, characterized in that: A pole shoe (232) is provided on the rotor magnetic pole (23), and a magnetic steel (26) is provided inside the pole shoe (232).

6. The motor with a hybrid excitation salient pole rotor structure according to claim 5, characterized in that: Two pole shoes (232) are provided on each rotor pole (23), and the two pole shoes (232) are arranged to be inclined relative to each other so that the two pole shoes (232) are in a V shape, and the two magnetic steels (26) on the same rotor pole (23) are opposite poles.

7. The motor with a hybrid excitation salient pole rotor structure as claimed in claim 6, characterized in that: A weight-reducing hole (233) is provided on the rotor magnetic pole (23), and the weight-reducing hole (233) is located between the pole shoe (232) and the damping hole (231).

8. The motor with a hybrid excitation salient pole rotor structure as claimed in claim 3, characterized in that: A groove (25) is formed between adjacent rotor poles (23), the electric excitation winding (21) is located in the groove (25), and the contact portion between the electric excitation winding (21) and the rotor lamination core is provided with insulating paper.

9. The motor with a hybrid excitation salient pole rotor structure as claimed in claim 3, characterized in that: The flat wire winding (12) adopts a distributed short-distance flat wire winding (12); an iron core tooth (15) is provided on the inner wall of the stator iron core (1) along its own axial direction; a plurality of the iron core teeth (15) are arranged in a circumferential array along the stator iron core (1); tooth slots (14) are formed between adjacent iron core teeth (15); and the distributed short-distance flat wire winding (12) is located in the tooth slots (14) and is wound around the iron core teeth (15).

10. The motor with a hybrid excitation salient pole rotor structure according to claim 9, characterized in that: Pressure stop plates are respectively provided at both ends of the stator core (1), and the pressure stop plates abut against the ends of the stator core (1).

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