Permanent magnet synchronous motor rotor

Abstract

The utility model relates to the technical field of permanent magnet motors, in particular to a permanent magnet synchronous motor rotor which comprises a rotor ring, a plurality of magnetic clamping blocks are evenly arranged on the rotor ring in the circumferential direction, a permanent magnet is arranged between every two adjacent magnetic clamping blocks, the magnetism of every two adjacent permanent magnets is opposite, and connecting pieces are arranged between the magnetic clamping blocks and the rotor ring. The connecting piece enables the permanent magnet and the rotor ring to be spaced, a clamping groove is formed between every two adjacent magnetic clamping blocks, and the permanent magnet is embedded between the clamping grooves of every two adjacent magnetic clamping blocks. The rotor has the effects of reducing the magnetic leakage of the rotor and improving the working efficiency of the rotor.

Description

Technical Field

[0001] This application relates to the technical field of permanent magnet motors, and particularly to a rotor of a permanent magnet synchronous motor. Background Art

[0002] Permanent magnet motors use permanent magnets to generate magnetic fields and generate power through the interaction of current and magnetic fields. The main advantages of such motors include small size, good quietness, easy body layout, and light weight. Permanent magnet motors are divided into brushed and brushless types. Brushless permanent magnet motors usually have the advantages of simple structure, easy control, and convenient maintenance, and are widely used in various applications that require high-efficiency and low-noise power supplies.

[0003] Chinese Patent with Publication No. CN106787282A discloses a permanent magnet motor, including a stator core and a rotor core. A plurality of soft magnetic poles are provided on the outer peripheral surface of the rotor core, and a permanent magnetic pole is provided between two adjacent soft magnetic poles.

[0004] According to the distribution principle of the magnetic force lines of the permanent magnetic poles, in the process of using the above technology, the rotor core on the side of the rotor core facing the axis of the permanent magnetic pole is within the range of the magnetic force lines at the magnetic extreme of the permanent magnetic pole, and the rotor core within the range of the magnetic force lines at the magnetic extreme will cause a large magnetic leakage phenomenon in the permanent magnetic pole, and the magnetic leakage will affect the working efficiency of the motor, which has deficiencies. Summary of the Utility Model

[0005] In order to improve the problem of magnetic leakage generated on the side of the rotor core facing the permanent magnetic pole, this application provides a rotor of a permanent magnet synchronous motor.

[0006] The rotor of the permanent magnet synchronous motor provided by this application adopts the following technical solution:

[0007] A rotor of a permanent magnet synchronous motor includes a rotor ring. A plurality of magnetic clamping blocks are circumferentially and uniformly arranged on the rotor ring. A permanent magnet is arranged between two adjacent magnetic clamping blocks, and the magnetisms of two adjacent permanent magnets are opposite. A connecting member is arranged between the magnetic clamping block and the rotor ring, and the connecting member makes there be a spacing between the permanent magnet and the rotor ring.

[0008] By adopting the above technical solution, the designer places the permanent magnet between two magnetic clamping blocks, and through the connecting member, there is a spacing between the magnetic extreme of the permanent magnet and the rotor ring, thereby weakening the magnetic leakage effect caused by the rotor ring on the permanent magnet, and further improving the working efficiency of the motor.

[0009] Optionally, a slot is opened between two adjacent magnetic clamping blocks, and the permanent magnet is embedded between the slots of two adjacent magnetic clamping blocks.

[0010] By adopting the above technical solution, the technician embeds the permanent magnet between the card slots of two adjacent magnetic clamping blocks. Through the restrictive effect of the card slots on the permanent magnet, the situation where the permanent magnet accidentally detaches due to the centrifugal force of the rotor during the rapid rotation of the rotor is reduced, and the possibility of accidental loosening of the traditional bonded permanent magnet is reduced, which is beneficial to improving the service life of the rotor.

[0011] Optionally, both the rotor ring and the magnetic clamping blocks are formed by sequentially stacking a plurality of sheet-like structures. Mounting holes are provided on both the rotor ring and the magnetic clamping blocks, and riveting columns are passed through the mounting holes.

[0012] By adopting the above technical solution, both the rotor ring and the magnetic clamping blocks are made of plates by stamping equipment, and then are sequentially stacked to form the rotor ring or the magnetic clamping blocks by sleeving them on the riveting columns through the mounting holes. Stacking the sheet-like structures in sequence is beneficial to reducing eddy current losses, thereby improving the working efficiency of the motor.

[0013] Optionally, an adhesive is provided between two adjacent magnetic clamping blocks along the axial direction of the rotor ring.

[0014] By adopting the above technical solution, the firmness of the overall structure of the magnetic clamping blocks is further improved, and at the same time, it is convenient for the installer to insert the permanent magnet on the card slots between two adjacent magnetic clamping blocks, which is beneficial to reducing the possibility of bending at the card slots of the sheet-like magnetic clamping blocks caused by installing the permanent magnet.

[0015] Optionally, the connecting member includes a connecting strip provided on the magnetic clamping block. One end of the connecting strip facing away from the magnetic clamping block is provided on the rotor ring, and the width of the connecting strip is smaller than the width of the magnetic clamping block facing the rotor ring.

[0016] By adopting the above technical solution, the connecting strip separates the magnetic clamping block from the rotor ring, so as to keep a certain distance between the permanent magnet and the rotor ring. At the same time, by reducing the cross-section of the connecting strip, the phenomenon of magnetic leakage is further reduced, and a plurality of permanent magnet magnetic clamping blocks are arranged circumferentially and staggeredly, which is beneficial to improving the stability and strength of the overall structure of the rotor.

[0017] Optionally, the rotor ring, the connecting strip and the magnetic clamping block are integrally formed.

[0018] By adopting the above technical solution, through one-piece production, it is beneficial to reduce the manufacturing cost, and at the same time, it is beneficial to improve the consistency of the overall structure ratio of the rotor and the integrity of the structural strength, and it is also convenient for the installer to assemble.

[0019] Optionally, the connecting member includes a connecting piece disposed on the magnetic clamping block. A clamping block is provided at one end of the connecting piece facing away from the magnetic clamping block. A clamping groove for inserting the clamping block is formed in the rotor ring along its axial direction. The cross-sections of the clamping block and the clamping groove are both T-shaped.

[0020] By adopting the above technical solution, when one of the magnetic clamping blocks is damaged, the maintenance personnel can quickly replace and repair it through the cooperation of the clamping block and the clamping groove, which is beneficial to reducing the maintenance cost. At the same time, the split design and processing of the rotor ring and the magnetic clamping block are beneficial to saving the consumption of stamping plates and reducing the procurement cost of the plates.

[0021] Optionally, the connecting piece, the clamping block and the magnetic clamping block are integrally formed.

[0022] By adopting the above technical solution, it is convenient for the installer to install and is beneficial to reducing the assembly difficulty.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The designer places the permanent magnet between two magnetic clamping blocks, and through the connecting member, there is a spacing between the magnetic pole end of the permanent magnet and the rotor ring, thereby weakening the magnetic leakage effect caused by the rotor ring on the permanent magnet, and further improving the working efficiency of the motor;

[0025] 2. The technician embeds the permanent magnet between the clamping grooves of two adjacent magnetic clamping blocks. Through the limiting effect of the clamping grooves on the permanent magnet, the situation that the permanent magnet accidentally detaches due to the centrifugal force of the rotor during the rapid rotation of the rotor is reduced, and the possibility of accidental loosening of the traditional bonded permanent magnet is reduced, which is beneficial to improving the service life of the rotor;

[0026] 3. The connecting strip separates the magnetic clamping block from the rotor ring, so as to keep a spacing between the permanent magnet and the rotor ring. At the same time, by reducing the cross-section of the connecting strip, the phenomenon of magnetic leakage is further reduced, and multiple permanent magnet magnetic clamping blocks are arranged circumferentially and staggered, which is beneficial to improving the stability and strength of the overall structure of the rotor;

[0027] 4. When one of the magnetic clamping blocks is damaged, the maintenance personnel can quickly replace and repair it through the cooperation of the clamping block and the clamping groove, which is beneficial to reducing the maintenance cost. At the same time, the split design and processing of the rotor ring and the magnetic clamping block are beneficial to saving the consumption of stamping plates and reducing the procurement cost of the plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of Embodiment 1 of the present application.

[0029] Figure 2 is a front view of Embodiment 1 of the present application.

[0030] Figure 3 It is the front view of Embodiment 2 of the present application.

[0031] Explanation of reference numerals: 1, rotor ring; 2, magnetic clamping block; 3, permanent magnet; 4, connecting piece; 41, connecting bar; 42, connecting plate; 43, clamping block; 44, clamping groove; 5, clamping slot; 6, mounting hole; 7, riveting post; 8, adhesive. Detailed implementation manners

[0032] The following further elaborates on the present application in conjunction with the attached Figures 1-3 drawings.

[0033] Embodiment 1 of the present application discloses a permanent magnet synchronous motor rotor.

[0034] Embodiment 1

[0035] Referring to Figure 1 , a permanent magnet synchronous motor rotor includes a rotor ring 1, on which a plurality of magnetic clamping blocks 2 are circumferentially and uniformly arranged. The magnetic clamping blocks 2 can adopt silicon steel materials in the prior art. A permanent magnet 3 is arranged between every two adjacent magnetic clamping blocks 2. The magnetic poles between every two adjacent permanent magnets 3 are opposite. A connecting piece 4 is arranged between the magnetic clamping block 2 and the rotor ring 1, and the connecting piece 4 makes there be a spacing between the permanent magnet 3 and the rotor ring 1.

[0036] Through the special layout of the magnetic clamping blocks 2 and the permanent magnets 3, an efficient design of the magnetic circuit is achieved. At the same time, the application of the connecting piece 4 keeps a certain spacing between the permanent magnet 3 and the rotor ring 1, thereby reducing magnetic leakage and improving the overall performance of the motor.

[0037] Referring to Figure 1 and Figure 2 , clamping slots 5 are formed between the opposite sides of every two adjacent magnetic clamping blocks 2. The permanent magnet 3 is embedded between the clamping slots 5 of every two adjacent magnetic clamping blocks 2. Both the rotor ring 1 and the magnetic clamping blocks 2 are formed by sequentially stacking a plurality of sheet-like structures along the axis direction of the rotor ring 1. Mounting holes 6 are formed on both the rotor ring 1 and the magnetic clamping blocks 2. A riveting post 7 is passed through the mounting hole 6. The axis of the riveting post 7 is parallel to the axis of the rotor ring 1. An adhesive 8 is bonded between every two adjacent magnetic clamping blocks 2 along the axis direction of the rotor ring 1. The adhesive 8 can adopt anaerobic glue or silicone adhesive in the prior art.

[0038] Referring to Figure 1 and Figure 2 , the connecting piece 4 includes a connecting bar 41 integrally formed on the magnetic clamping block 2. One end of the connecting bar 41 facing away from the magnetic clamping block 2 is integrally formed on the rotor ring 1. The width of the connecting bar 41 is much smaller than the width of the magnetic clamping block 2 on the side facing the rotor ring 1. The side of the magnetic clamping block 2 facing away from the connecting bar 41 is arc-shaped. The rotor ring 1, the connecting bar 41 and the magnetic clamping block 2 are made by one-time stamping of a sheet.

[0039] The design of the card slot 5 provides a more stable installation method for the permanent magnet 3, effectively reducing the accidental detachment of the permanent magnet 3 due to the centrifugal force of the rotor during the rapid rotation of the rotor, thereby enhancing the stability and durability of the motor. At the same time, the adhesive 8 enhances the connection strength between the magnetic card blocks 2, reducing the possibility of bending at the card slot 5 of the sheet-shaped magnetic card block 2 caused by the installation of the permanent magnet 3. The integral stamping improves the connection strength and overall rigidity between components, thereby enhancing the durability and stability of the rotor.

[0040] The implementation principle of Embodiment 1 is: through the special layout of the magnetic card block 2 and the permanent magnet 3, an efficient design of the magnetic circuit is achieved. At the same time, the application of the connecting member 4 keeps a certain distance between the permanent magnet 3 and the rotor ring 1, thereby reducing magnetic leakage and improving the overall performance of the motor.

[0041] The design of the card slot 5 provides a more stable installation method for the permanent magnet 3, effectively reducing the accidental detachment of the permanent magnet 3 due to the centrifugal force of the rotor during the rapid rotation of the rotor, thereby enhancing the stability and durability of the motor. At the same time, the adhesive 8 enhances the connection strength between the magnetic card blocks 2, reducing the possibility of bending at the card slot 5 of the sheet-shaped magnetic card block 2 caused by the installation of the permanent magnet 3. The integral stamping improves the connection strength and overall rigidity between components, thereby enhancing the durability and stability of the rotor.

[0042] Embodiment 2

[0043] Refer to Figure 3 , the connecting member 4 includes a connecting piece 42 integrally formed on the magnetic card block 2. The width of the connecting piece 42 is much smaller than the width of the magnetic card block 2 on the side facing the rotor ring 1. One end of the connecting piece 42 facing away from the magnetic card block 2 is integrally formed with a clamping block 43. A clamping groove 44 for inserting the clamping block 43 is provided on the outer side wall of the rotor ring 1 along its axial direction. The cross-sections of the clamping block 43 and the clamping groove 44 are both T-shaped. The connecting piece 42, the clamping block 43 and the magnetic card block 2 are made by one-time stamping of a sheet.

[0044] The implementation principle of Embodiment 2 is: The installer first assembles multiple sheet-shaped magnetic card blocks 2 into a whole through the riveting posts 7 and the mounting holes 6, and then installs the magnetic card block 2 on the rotor ring 1 through the cooperation of the clamping block 43 and the clamping groove 44. When one of the magnetic card blocks 2 is accidentally damaged, the maintenance personnel can quickly replace and repair it through the cooperation of the clamping block 43 and the clamping groove 44.

[0045] The above are all preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.

Claims

1. A permanent magnet synchronous motor rotor, characterized in that: The invention comprises a rotor ring (1), wherein a plurality of magnetic blocks (2) are evenly arranged circumferentially on the rotor ring (1), a permanent magnet (3) is arranged between two adjacent magnetic blocks (2), the magnetic properties of the two adjacent permanent magnets (3) are opposite, a connecting piece (4) is arranged between the magnetic block (2) and the rotor ring (1), and the connecting piece (4) enables a distance to exist between the permanent magnet (3) and the rotor ring (1).

2. A permanent magnet synchronous motor rotor according to claim 1, characterized in that: A card slot (5) is provided between two adjacent card magnet blocks (2), and the permanent magnet (3) is embedded between the card slots (5) of the two adjacent card magnet blocks (2).

3. A permanent magnet synchronous motor rotor according to claim 2, characterized in that: The rotor ring (1) and the magnetic card block (2) are both formed by stacking a plurality of sheet structures in sequence, and both the rotor ring (1) and the magnetic card block (2) are provided with mounting holes (6), and the mounting holes (6) are provided with rivet columns (7).

4. A permanent magnet synchronous motor rotor according to claim 3, characterized in that: An adhesive (8) is provided between two adjacent magnetic blocks (2) along the axis direction of the rotor ring (1).

5. The permanent magnet synchronous motor rotor according to claim 3, characterized in that: The connecting member (4) comprises a connecting strip (41) arranged on the magnetic card block (2), one end of the connecting strip (41) facing away from the magnetic card block (2) is arranged on the rotor ring (1), and the width of the connecting strip (41) is smaller than the width of the magnetic card block (2) on the side facing the rotor ring (1).

6. A permanent magnet synchronous motor rotor according to claim 5, characterized in that: The rotor ring (1), the connecting strip (41) and the magnetic block (2) are integrally formed and arranged.

7. The permanent magnet synchronous motor rotor according to claim 3, characterized in that: The connecting member (4) comprises a connecting piece (42) arranged on the magnetic card block (2); a clamping block (43) is arranged at one end of the connecting piece (42) facing away from the magnetic card block (2); a clamping groove (44) for the clamping block (43) to be inserted is provided on the rotor ring (1) along its axial direction; and the cross sections of the clamping block (43) and the clamping groove (44) are both T-shaped.

8. A permanent magnet synchronous motor rotor according to claim 7, characterized in that: The connecting piece (42), the clamping block (43) and the magnetic clamping block (2) are integrally formed.

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