Segmented hybrid symmetric laminated rotor, preparation method and motor

Abstract

The invention discloses a segmented hybrid symmetric laminated rotor, a preparation method and a motor, the rotor comprises a sub-shaft and a rotor core, the rotor core comprises a plurality of laminated assemblies symmetrically arranged relative to the middle of the rotor core, each laminated assembly is composed of a plurality of laminated individuals arranged in a stacked manner, and the laminated individuals are arranged in the sub-shaft. A plurality of groups of magnetic steel grooves are circumferentially formed in the surfaces of the lamination individuals, the shapes and sizes of the groove tops at the two ends of the magnetic steel grooves located on different lamination assemblies are different, and different magnetic barrier structures are formed between the different magnetic steel grooves and the lamination individuals. The magnetic steel grooves with different shapes are arranged on the lamination assembly, so that the lamination assembly has different magnetic barrier structures, the lamination assembly can form the rotor core of the motor rotor in various combination modes according to use requirements, and when the rotor rotates, torque harmonics with different phases generated by the lamination assembly with different magnetic barrier structures are mutually counteracted, so that the rotor core is more stable and reliable. The torque ripple of the synchronous reluctance motor can be effectively reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of motor rotor components, and in particular relates to a segmented hybrid symmetrical laminated rotor. Background Art

[0002] The rotor core of the laminated rotor is composed of multiple thin laminations, which are neatly stacked together according to the design requirements to form an integral rotor core. The rotor core with laminated design can reduce eddy current loss and magnetic resistance, thereby improving the efficiency and performance of the motor.

[0003] When the motor is in use, the rotor may experience torque pulsation due to conditions such as magnetic saturation, causing the motor to experience performance fluctuations and unstable operation. Summary of the invention

[0004] The present invention aims to solve the problem that the torque pulsation in the operation of the rotor in the prior art causes the performance fluctuation and unstable operation of the motor, and proposes the following technical solution:

[0005] A segmented hybrid symmetrical laminated rotor, comprising: a rotor shaft and a rotor core, wherein the rotor core is sequentially installed on the rotor shaft in direction A, wherein the rotor core comprises a plurality of laminated assemblies symmetrically arranged relative to the middle of the rotor core, wherein the laminated assemblies are composed of a plurality of laminated individuals stacked and arranged, wherein a plurality of groups of magnetic steel slots are circumferentially provided on the surface of the laminated individuals, wherein the number of the magnetic steel slots in the same group is two, and the two magnetic steel slots are arranged in a V-shape;

[0006] The shapes and sizes of the groove tops at both ends of the magnetic steel grooves located on different lamination assemblies are different, and different magnetic steel grooves and lamination individuals form different magnetic barrier structures;

[0007] After the lamination assembly is sequentially installed into the rotor shaft in direction A and fixed, a plurality of symmetrically arranged lamination assemblies with different magnetic barrier structures form the rotor core of the motor rotor. When the rotor rotates, torque harmonics of different phases generated by the lamination assemblies with different magnetic barrier structures cancel each other out, effectively reducing the torque pulsation of the synchronous reluctance motor.

[0008] As a preferred embodiment of the above technical solution, part of the lamination assemblies are provided with multiple groups of permanent magnets, the number of permanent magnets in the same group is two, and the two permanent magnets are inserted into the magnetic steel slots of multiple lamination individuals.

[0009] As a preferred embodiment of the above technical solution, the permanent magnets on different lamination assemblies are made of different materials, and the permanent magnets made of different materials have different magnetic strengths.

[0010] As a preferred embodiment of the above technical solution, part of the lamination assemblies are provided with multiple groups of support bodies, the number of support bodies in the same group is two, and the two support bodies are inserted into the magnetic steel grooves of multiple lamination individuals.

[0011] As a preferred embodiment of the above technical solution, the support body has the same shape and size as the permanent magnet, and the support body is made of non-metal and insulating material.

[0012] As a preferred embodiment of the above technical solution, it also includes multiple groups of connecting components, which are used to connect the permanent magnet and the support body in the same plane. The connecting components include a limiting plate, a limiting sheet and a fixing sheet. Limiting rods for limiting the permanent magnet or the support body are arranged on both sides of the limiting plate, and both ends of the limiting sheet and the fixing sheet are sleeved on the surface of the limiting rod. The ends of the limiting rod are located on both sides of the fixing sheet and are sleeved with limiting nuts.

[0013] As a preferred embodiment of the above technical solution, it also includes a fixing screw and a fixing nut, one end of the fixing screw passes through the limiting grooves of several laminated individuals and extends to the outside, and the end of the fixing screw is threadedly sleeved with the fixing nut.

[0014] A method for preparing a segmented hybrid symmetrical laminated rotor, wherein the method is applied to the segmented hybrid symmetrical laminated rotor, and comprises the following steps:

[0015] S1, lamination assembly combination arrangement;

[0016] According to the different magnetic barrier structures of the lamination components and the use requirements of the permanent magnets, the lamination components are combined and arranged, and the arranged lamination components are numbered;

[0017] S2, rotor core assembly;

[0018] The plurality of lamination assemblies are sequentially loaded into the fixing screw rod in the A direction and fixed by the fixing nut, so that the plurality of lamination assemblies with different magnetic barrier structures arranged symmetrically form a rotor core;

[0019] S3, permanent magnet and support body are connected;

[0020] According to the use requirements, the permanent magnets or the support bodies are sequentially installed into the connection components, and the permanent magnets or the support bodies are installed into the rotor core and fixed by connecting the connection components;

[0021] S4, assembling the rotor core;

[0022] Connect the assembled rotor core to the rotor shaft and install the rotor core in direction A;

[0023] S5. Install windings;

[0024] After the rotor winding is wound on the rotor core, the rotor production is completed after inspection.

[0025] A motor is produced by using the segmented hybrid symmetrical laminated rotor. The motor comprises a housing and a motor stator. A segmented hybrid symmetrical laminated rotor is rotatably arranged inside the motor stator.

[0026] The beneficial effects of the present invention are:

[0027] 1. Magnetic steel slots of different shapes are arranged on the lamination assembly to make it have different magnetic barrier structures. The lamination assembly can form the rotor core of the motor rotor in a variety of combinations according to the use requirements. When the rotor rotates, the torque harmonics of different phases generated by the lamination assemblies with different magnetic barrier structures offset each other, which can effectively reduce the torque pulsation of the synchronous reluctance motor, thereby improving the running stability of the motor and improving the control accuracy of the motor;

[0028] 2. Permanent magnets with different magnetic strengths are arranged on different laminated assemblies, so that the laminated assemblies have more assembly variations. The laminated assemblies have different magnetic barriers and different magnetic forces, thereby optimizing the motor performance and further improving the control accuracy of the motor;

[0029] 3. The support body can support the permanent magnet to prevent the permanent magnet from being vacant and moving when the motor rotor rotates. At the same time, the lamination assembly with permanent magnets and the rotor without permanent magnets are symmetrically arranged in sections, which can improve the torque density of the motor rotor and reduce the axial force, thereby further optimizing the motor torque pulsation.

[0030] 4. The connection assembly can be used to connect and restrict the permanent magnet and the support body, which is convenient for installing the permanent magnet and the support body. After the limit assembly is fixed to the rotor core, it can prevent the permanent magnet and the support body from being displaced and affecting the normal operation of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 What is shown is a schematic diagram of the overall structure of the embodiment;

[0032] Figure 2 Shown is a rear view of the embodiment;

[0033] Figure 3 Shown is a schematic diagram of the assembly of the rotor core in the embodiment;

[0034] Figure 4 What is shown is a front view of a laminated unit in an embodiment;

[0035] Figure 5 Shown are structural diagrams of various parts of the connection assembly in the embodiment.

[0036] In the figure: 10, rotor shaft; 20, rotor core; 21, lamination assembly; 211, lamination individual; 212, multiple groups of magnetic steel slots; 31, permanent magnet; 32, support body; 40, connecting assembly; 41, limiting plate; 42, limiting plate; 43, limiting rod; 44, limiting nut; 45, fixing plate; 51, fixing screw; 52, fixing nut. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings of the specification.

[0038] Example

[0039] Figure 1-Figure 4 In the embodiment, a segmented hybrid symmetrical laminated rotor comprises: a rotor shaft 10 and a rotor core 20, wherein the rotor core 20 is sequentially installed on the rotor shaft 10 in the A direction, and is characterized in that the rotor core 20 comprises a plurality of laminated assemblies 21 symmetrically arranged relative to the middle of the rotor core 20, wherein the laminated assemblies 21 are composed of a plurality of laminated individuals 211 stacked and arranged, wherein a plurality of groups of magnetic steel slots 212 are circumferentially provided on the surface of the laminated individuals 211, wherein the number of the magnetic steel slots in the same group is two, and the two magnetic steel slots are arranged in a V-shape;

[0040] The shapes and sizes of the groove tops at both ends of the magnetic steel grooves on different lamination assemblies 21 are different, and different magnetic steel grooves and lamination individuals 211 form different magnetic barrier structures;

[0041] After the lamination assembly 21 is sequentially installed into the rotor shaft 10 in direction A and fixed, a plurality of symmetrically arranged lamination assemblies 21 with different magnetic barrier structures form the rotor core 20 of the motor rotor. When the rotor rotates, the torque harmonics of different phases generated by the lamination assemblies 21 with different magnetic barrier structures cancel each other out, effectively reducing the torque pulsation of the synchronous reluctance motor.

[0042] It also includes a fixing screw 51 and a fixing nut 52 . One end of the fixing screw 51 passes through the limiting grooves of a plurality of lamination individuals 211 and extends to the outside, and the end of the fixing screw 51 is threadedly sleeved with the fixing nut 52 .

[0043] Before assembling the motor rotor, the stacking assemblies 21 are arranged in combination according to their different magnetic barrier structures and the use requirements of the permanent magnets 31, and the arranged stacking assemblies 21 are numbered. The multiple stacking assemblies 21 are sequentially installed on the fixing screw 51 in the A direction. After the multiple stacking assemblies 21 are fixed by the fixing nut 52, the multiple stacking assemblies 21 with different magnetic barrier structures constitute the rotor core 20 of the motor rotor. Subsequently, the permanent magnets 31 or the support bodies 32 are sequentially installed into the connecting assembly 40 according to the use requirements, and the permanent magnets 31 or the support bodies 32 are installed into the rotor core 20 and fixed by connecting the connecting assembly 40. The assembled rotor core 20 can be docked with the rotor shaft 10, and then the rotor core 20 is installed into the rotor shaft 10 in the A direction. After the rotor core 20 is wound around the rotor core 20 using a rotor winding, the rotor production can be completed after inspection.

[0044] Magnetic steel slots of different shapes are arranged on the lamination assembly 21 so that it has different magnetic barrier structures, and the lamination assembly 21 can form the rotor core 20 of the motor rotor in a variety of combinations according to the use requirements. When the rotor rotates, the torque harmonics of different phases generated by the lamination assemblies 21 with different magnetic barrier structures offset each other, which can effectively reduce the torque pulsation of the synchronous reluctance motor, thereby improving the smoothness of the motor operation and improving the control accuracy of the motor.

[0045] Figure 3-Figure 5 In the embodiment, some of the lamination assemblies 21 are provided with a plurality of groups of permanent magnets 31 , the number of the permanent magnets 31 in the same group is two, and the two permanent magnets 31 are inserted into the magnetic steel slots of a plurality of lamination individuals 211 .

[0046] The permanent magnets 31 on different lamination assemblies 21 are made of different materials, and the permanent magnets 31 made of different materials have different magnetic strengths.

[0047] Permanent magnets 31 with different magnetic strengths are arranged on different lamination assemblies 21, so that the lamination assemblies 21 have more assembly variations. The lamination assemblies 21 have different magnetic barriers and different magnetic forces, thereby optimizing the motor performance and further improving the control accuracy of the motor.

[0048] Figure 3-Figure 5 In the embodiment, some of the lamination assemblies 21 are provided with a plurality of groups of support bodies 32 , the number of the support bodies 32 in one group is two, and the two support bodies 32 are inserted into the magnetic steel grooves of a plurality of lamination individuals 211 .

[0049] The support body 32 has the same shape and size as the permanent magnet 31 , and the support body 32 is made of non-metal and insulating material.

[0050] The support body 32 is configured to support the permanent magnet 31, thereby preventing the permanent magnet 31 from being left vacant and moving when the motor rotor rotates. At the same time, the lamination assembly 21 with the permanent magnet 31 and the rotor without the permanent magnet 31 are symmetrically arranged in sections, which can improve the torque density of the motor rotor and reduce the axial force, thereby further optimizing the motor torque pulsation.

[0051] Figure 1 , Figure 3 and Figure 5 The invention also includes a plurality of connection components 40, wherein the connection components 40 are used to connect the permanent magnet 31 and the support body 32 in the same plane, and the connection components 40 include a limiting plate 41, a limiting sheet 42 and a fixing sheet 45. Limiting rods 43 for limiting the permanent magnet 31 or the support body 32 are arranged on both sides of the limiting plate 41, and both ends of the limiting sheet 42 and the fixing sheet 45 are sleeved on the surface of the limiting rod 43, and the ends of the limiting rod 43 are located on both sides of the fixing sheet 45 and are sleeved with limiting nuts 44.

[0052] Before assembling the rotor core 20, it is required to install the permanent magnet 31 or the support body 32 into the connecting assembly 40 in sequence along the limiting rods 43 on both sides, and then install the limiting plate 42 from the end of the limiting rod 43, and rotate the inner limiting nut 44 so that the limiting plate 42 and the limiting plate 41 connect and limit the permanent magnet 31 or the support body 32. After the rotor core 20 is assembled, hold one end of the limiting plate 41 to install the connecting assembly 40 into the interior of the rotor core 20, and the corresponding permanent magnet 31 and the support body 32 are installed to the corresponding positions, and then install the fixing plate 45 on the limiting rod 43, and rotate the outer limiting nut 44 so that the limiting plate 41 and the fixing plate 45 fix the connecting assembly 40 on the rotor core 20.

[0053] The connection component 40 can be used to connect and restrict the permanent magnet 31 and the support body 32, which is convenient for installing the permanent magnet 31 and the support body 32. After the limit component is fixed to the rotor core 20, it can prevent the permanent magnet 31 and the support body 32 from being displaced and affecting the normal operation of the motor.

[0054] A method for preparing a segmented hybrid symmetrical laminated rotor, wherein the method is applied to the segmented hybrid symmetrical laminated rotor, and comprises the following steps:

[0055] S1, stacking assembly 21 is combined and arranged;

[0056] The stacked components 21 are combined and arranged according to different magnetic barrier structures and the use requirements of the permanent magnets 31, and the arranged stacked components 21 are numbered;

[0057] S2, assembling the rotor core 20;

[0058] Multiple lamination assemblies 21 are sequentially installed into the fixing screw 51 in the A direction and fixed by the fixing nut 52, so that multiple lamination assemblies 21 with different magnetic barrier structures arranged symmetrically form the rotor core 20;

[0059] S3, permanent magnet 31 and support body 32 are connected;

[0060] According to the use requirements, the permanent magnet 31 or the support body 32 is sequentially installed into the connecting assembly 40, and the permanent magnet 31 or the support body 32 is installed into the rotor core 20 and fixed by connecting the connecting assembly 40;

[0061] S4, assembling the rotor core 20;

[0062] The assembled rotor core 20 is butted against the rotor shaft 10, and the rotor core 20 is installed in the A direction;

[0063] S5. Install windings;

[0064] After the rotor winding is wound on the rotor core 20, the rotor production is completed after inspection.

[0065] A motor is produced by using the segmented hybrid symmetrical laminated rotor. The motor comprises a housing and a motor stator. A segmented hybrid symmetrical laminated rotor is rotatably arranged inside the motor stator.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. Segmented hybrid symmetrical laminated rotor, including: A rotor shaft (10) and a rotor core (20), wherein the rotor core (20) is sequentially installed on the rotor shaft (10) in the A direction, and is characterized in that the rotor core (20) comprises a plurality of lamination assemblies (21) symmetrically arranged relative to the middle of the rotor core (20), the lamination assemblies (21) are composed of a plurality of lamination individuals (211) stacked and arranged, and a plurality of groups of magnetic steel grooves (212) are provided on the surface of the lamination individuals (211) in the circumferential direction, and the number of the magnetic steel grooves in the same group is two, and the two magnetic steel grooves are arranged in a V-shape; The shapes and sizes of the groove tops at both ends of the magnetic steel grooves located on different lamination assemblies (21) are different, and different magnetic steel grooves and lamination individuals (211) form different magnetic barrier structures; After the lamination assemblies (21) are sequentially installed into the rotor shaft (10) in the A direction and fixed, a plurality of lamination assemblies (21) with different magnetic barrier structures are symmetrically arranged to form a rotor core (20) of the motor rotor. When the rotor rotates, torque harmonics of different phases generated by the lamination assemblies (21) with different magnetic barrier structures cancel each other out, thereby effectively reducing the torque pulsation of the synchronous reluctance motor.

2. The segmented hybrid symmetrical laminated rotor according to claim 1, characterized in that: Some of the lamination assemblies (21) are provided with a plurality of groups of permanent magnets (31), the number of permanent magnets (31) in one group is two, and the two permanent magnets (31) are inserted into the magnetic steel slots of a plurality of lamination individuals (211).

3. The segmented hybrid symmetrical laminated rotor according to claim 2, characterized in that: The permanent magnets (31) located on different lamination assemblies (21) are made of different materials, and the permanent magnets (31) made of different materials have different magnetic strengths.

4. The segmented hybrid symmetrical laminated rotor according to claim 2, characterized in that: Some of the lamination assemblies (21) are provided with a plurality of groups of support bodies (32), the number of support bodies (32) in one group is two, and the two support bodies (32) are inserted into the magnetic steel grooves of a plurality of lamination individuals (211).

5. The segmented hybrid symmetrical laminated rotor according to claim 4, characterized in that: The support body (32) has the same shape and size as the permanent magnet (31), and the support body (32) is non-metallic and made of an insulating material.

6. The segmented hybrid symmetrical laminated rotor according to claim 1, characterized in that: The invention also comprises a plurality of connection components (40), wherein the connection components (40) are used to connect the permanent magnet (31) and the support body (32) in the same plane, and the connection components (40) comprise a limiting plate (41), a limiting sheet (42) and a fixing sheet (45), and limiting rods (43) for limiting the permanent magnet (31) or the support body (32) are arranged on both sides of the limiting plate (41), and both ends of the limiting sheet (42) and the fixing sheet (45) are sleeved on the surface of the limiting rod (43), and the ends of the limiting rod (43) are sleeved on the surfaces of both sides of the fixing sheet (45) and are provided with limiting nuts (44).

7. The segmented hybrid symmetrical laminated rotor according to claim 2, characterized in that: It also includes a fixing screw (51) and a fixing nut (52), one end of the fixing screw (51) passes through the limiting grooves of a plurality of laminated individuals (211) and extends to the outside, and the end of the fixing screw (51) is threadedly sleeved with the fixing nut (52).

8. A method for preparing a segmented hybrid symmetrical laminated rotor, the method for preparing a segmented hybrid symmetrical laminated rotor being applied to the segmented hybrid symmetrical laminated rotor according to any one of claims 1 to 7, characterized in that: The following steps are included: S1, stacking components (21) are combined and arranged; Arranging the stacked components (21) in combination according to different magnetic barrier structures and the use requirements of the permanent magnets (31), and numbering the arranged stacked components (21); S2, assembling the rotor core (20); The plurality of lamination assemblies (21) are sequentially installed into the fixing screw rod (51) in the A direction and fixed by the fixing nut (52), so that the plurality of lamination assemblies (21) with different magnetic barrier structures arranged symmetrically form a rotor core (20); S3, the permanent magnet (31) and the support body (32) are connected; According to use requirements, the permanent magnet (31) or the support body (32) is sequentially installed in the connection assembly (40), and the permanent magnet (31) or the support body (32) is installed in the rotor core (20) and fixed by connecting the connection assembly (40); S4, assembling the rotor core (20); The assembled rotor core (20) is butted against the rotor shaft (10), and the rotor core (20) is installed in the A direction; S5. Install windings; After the rotor winding is wound on the rotor core (20), the rotor production is completed after inspection.

9. A motor, wherein the motor is produced by using the segmented hybrid symmetrical laminated rotor according to any one of claims 1 to 7, characterized in that: The motor comprises a housing and a motor stator, wherein a segmented hybrid symmetrical laminated rotor is rotatably arranged inside the motor stator.

Images