CN220139302U - Positioning type magnetic steel rotor structure - Google Patents
Positioning type magnetic steel rotor structure Download PDFInfo
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- CN220139302U CN220139302U CN202321370903.XU CN202321370903U CN220139302U CN 220139302 U CN220139302 U CN 220139302U CN 202321370903 U CN202321370903 U CN 202321370903U CN 220139302 U CN220139302 U CN 220139302U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 41
- 239000010959 steel Substances 0.000 title claims abstract description 41
- 238000004080 punching Methods 0.000 claims description 11
- 238000003475 lamination Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 2
- 238000002955 isolation Methods 0.000 abstract description 8
- 230000005389 magnetism Effects 0.000 abstract description 7
- 238000009434 installation Methods 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model discloses a positioning type magnetic steel rotor structure which comprises a rotor core, wherein a plurality of permanent magnets are attached to the outer side wall of the rotor core, the permanent magnets are distributed circumferentially according to the central axis of the rotor core, each permanent magnet comprises a positioning permanent magnet and a non-positioning permanent magnet, a positioning groove is formed in the inner side wall of each positioning permanent magnet, a positioning protrusion is formed in the outer side wall of the rotor core, the positioning protrusions are matched with the positioning grooves, and two adjacent permanent magnets are abutted. According to the scheme, the processing of the magnetic steel position and the magnetism isolating bridge is omitted, the processing cost and the processing difficulty of the rotor motor are reduced, and meanwhile, the accurate positioning of the permanent magnet is completed; the air gap between the adjacent permanent magnets is reduced, the magnetic pole leakage phenomenon caused by a magnetic isolation bridge is avoided, and the service performance of the motor and the utilization rate of the permanent magnets are improved.
Description
Technical Field
The utility model relates to the technical field of permanent magnet motor rotors, in particular to a positioning type magnetic steel rotor structure.
Background
With the appearance of high-performance rare earth permanent magnet materials and the continuous improvement of the cost performance of power electronic devices, the permanent magnet synchronous motor is widely applied due to the advantages of high power factor, low loss and the like. The rotor magnetic circuit structure of the permanent magnet synchronous motor mainly comprises three types of permanent magnet surface-mounted type, built-in type and claw pole type, wherein the surface-mounted type rotor has the advantages of simple structure, low manufacturing cost, small rotational inertia and the like, and is widely applied to the design of the low-speed permanent magnet synchronous motor. The permanent magnet positioning mode of the low-rotation-speed surface-mounted permanent magnet synchronous motor mainly comprises the following two modes: (1) The rotor core is directly fixed on the rotor core in a manual pasting mode, and the positioning mode has the following defects: the accumulated error of the manual bonding positioning mode is relatively large, the correctness and consistency of the installation positions of the permanent magnets cannot be ensured, and meanwhile, the installation difficulty is caused by the interaction force among the permanent magnets; (2) A plurality of planes are milled at equal intervals on the periphery of the rotor core and serve as magnetic steel positions for placing permanent magnets, a magnetic bridge is formed by protruding between two adjacent magnetic steel positions, and the permanent magnets are stuck in the magnetic steel positions. This positioning has the following disadvantages: 1) The processing technology is complex, a plurality of positioning grooves and magnetic isolation bridges are required to be processed on the surface of the motor rotor core along the circumference, and the processing cost of the motor rotor is greatly increased; 2) From the angle of magnetic field energy, the magnetic resistance of air can be much greater than that of an electronic iron core, an air gap exists between two adjacent permanent magnets due to the occurrence of a magnetic bridge, when the stator and the rotor of the permanent magnet synchronous motor relatively move, the magnetic conductance between the stator teeth of the opposite parts of the permanent magnets and the permanent magnets is basically unchanged, and in the space areas corresponding to the two side surfaces of the permanent magnets, the magnetic conductance changes greatly, so that the magnetic field energy in the motor changes greatly, and cogging torque is generated. Meanwhile, the magnetic resistance of the space areas corresponding to the two sides of the permanent magnet is larger, so that larger magnetic leakage can be generated, and the utilization rate of the permanent magnet is reduced.
For example, chinese patent publication No. CN104218705a, publication No. 2014, 12-17, entitled "a rotor core structure of permanent magnet motor", includes a plurality of rotor sheets, a plurality of magnetic steels and a magnetic steel buckle sleeve, positioning spacers equal to the magnetic steels are uniformly and integrally stamped on the outer circumferential surface of a part of the rotor sheets, when all the rotor sheets are integrated, the positioning spacers in the axial direction are aligned, each magnetic steel is inserted between two positioning spacers adjacent in the circumferential direction, and the magnetic steel buckle sleeve is arranged outside all the magnetic steels.
The existing patents have the following defects: the existing permanent magnet positioning structure has the advantages that a plurality of planes are milled out of the periphery of a rotor core to serve as magnetic steel positions for placing permanent magnets, so that the machining cost of a motor rotor is increased, an air gap exists between two adjacent permanent magnets, larger magnetic leakage can be generated, and the utilization rate of the permanent magnets is reduced.
Disclosure of Invention
The utility model aims to solve the problems that the processing cost of a motor rotor is increased, and an air gap exists between two adjacent permanent magnets to generate larger magnetic leakage and reduce the utilization rate of the permanent magnets by milling a plurality of planes on the periphery of a rotor core to serve as magnetic steel positions for placing the permanent magnets in the existing permanent magnet positioning structure.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a location formula magnet steel rotor structure, includes rotor core, paste a plurality of permanent magnets on rotor core's the lateral wall, the permanent magnet is circumference distribution according to rotor core's central axis, the permanent magnet includes location permanent magnet and non-location permanent magnet, be equipped with the constant head tank on the inside wall of location permanent magnet, be equipped with the location arch on rotor core's the lateral wall, the location arch with the constant head tank cooperation, adjacent two permanent magnet butt. According to the positioning type magnetic steel rotor structure, the positioning protrusions are arranged on the outer side wall of the rotor core and used for limiting and positioning the permanent magnets, and then the non-positioning permanent magnets are sequentially attached to the outer side wall of the rotor core. The processing of magnetic steel positions and magnetism isolating bridges is omitted, the processing cost and the processing difficulty of the rotor motor are reduced, and meanwhile, the accurate positioning of the permanent magnets is completed. Adjacent two permanent magnets are abutted, so that an air gap between the adjacent permanent magnets is reduced, magnetic pole leakage caused by a magnetic isolation bridge is avoided, and the service performance of the motor and the utilization rate of the permanent magnets are improved. The positioning groove is arranged on the positioning permanent magnet, so that the use amount of the permanent magnet is reduced, the performance is ensured, and the cost is reduced.
Preferably, the depth of the positioning groove is greater than the height of the positioning protrusion. The gap between the permanent magnet and the rotor core is reduced.
Preferably, the inner side wall of the permanent magnet is attached to the outer side wall of the rotor core, the inner side wall of the permanent magnet is a cylindrical surface, the outer side wall of the rotor core is a cylindrical surface, and the radius of the inner side wall of the cylindrical surface on the permanent magnet is equal to the radius of the outer side wall of the cylindrical surface on the rotor core. So that the permanent magnets are completely attached to the outer side wall of the rotor core.
Preferably, the outer side wall of the permanent magnet is cylindrical, the radius of the outer side wall of the cylindrical surface of the permanent magnet is smaller than the radius of the inner side wall of the cylindrical surface of the permanent magnet, and the thickness of the cross section of the permanent magnet gradually becomes thinner from the middle to the two sides. Torque ripple and noise of the rotor motor are reduced. One side surface of each two adjacent permanent magnets which are in butt fit extends to pass through the central axis of the rotor core.
Preferably, the central angle occupied by the positioning permanent magnet is 53.75 degrees, and the central angle occupied by the non-positioning permanent magnet is 43.75 degrees. The permanent magnets with different sizes are adopted, so that the cogging torque can be greatly reduced, and the motor vibration can be reduced.
Preferably, the permanent magnets are divided into N-pole permanent magnets and S-pole permanent magnets, which are alternately arranged in the circumferential direction. Coating a proper amount of glue on the outer side wall of the rotor core, combining a positioning groove of a positioning permanent magnet of an N pole with a positioning protrusion of the rotor core, attaching a non-positioning permanent magnet of an S pole next to the positioning permanent magnet, and attaching the rest permanent magnets according to the sequence of N-S-N; grinding the excircle rotor to the required size, sleeving a carbon fiber sleeve, and flattening the two ends.
Preferably, the rotor core is composed of a plurality of axially laminated rotor punching sheets.
Preferably, the outer edge of the rotor punching sheet is provided with a locating sheet extending outwards, the locating sheet is overlapped to form a limiting protrusion, and the limiting protrusion is distributed along the central axis direction of the rotor core.
Preferably, the outer edge of the rotor punching sheet positioned in the middle of the rotor core is provided with a positioning sheet extending outwards, the positioning sheet is overlapped to form a limiting protrusion, the limiting protrusion is distributed along the central axis direction of the rotor core, the limiting protrusion is positioned in the middle of the rotor core, and the positioning groove is positioned in the middle of the positioning permanent magnet. The positioning protrusions are matched with the positioning grooves, the installation positions of the permanent magnets are limited and positioned in the axial direction and the circumferential direction, and the permanent magnets are positioned more accurately.
Preferably, the outer edge of the rotor punching sheet positioned at the end part of the rotor core is provided with a positioning sheet extending outwards, the positioning sheet is overlapped to form a limiting protrusion, the limiting protrusion is distributed along the central axis direction of the rotor core, the limiting protrusion is positioned at the end part of the outer side wall of the rotor core, the positioning groove is positioned at the end part of the inner side wall of the permanent magnet, and the positioning groove is communicated with the end surface of the permanent magnet. The positioning protrusions are matched with the positioning grooves, the installation positions of the permanent magnets are limited and positioned in the axial direction and the circumferential direction, and the permanent magnets are positioned more accurately. The positioning groove at the end part is convenient to process, and the positioning permanent magnet is pressed and positioned when being attached.
Therefore, the utility model has the following beneficial effects: (1) The processing of magnetic steel positions and magnetism isolating bridges are omitted, the processing cost and the processing difficulty of the rotor motor are reduced, and meanwhile, the accurate positioning of the permanent magnets is completed; (2) The air gap between the adjacent permanent magnets is reduced, the magnetic pole leakage phenomenon caused by a magnetic isolation bridge is avoided, and the service performance of the motor and the utilization rate of the permanent magnets are improved.
Drawings
Fig. 1 is a schematic view of a structure of the present utility model.
Fig. 2 is a schematic structural view of a rotor sheet according to the present utility model.
Fig. 3 is a schematic structural view of a middle rotor core in the first embodiment.
Fig. 4 is a schematic view of a structure of a positioning permanent magnet in the first embodiment.
Fig. 5 is a schematic structural view of a middle rotor core in the second embodiment.
Fig. 6 is a schematic diagram of a structure of a positioning permanent magnet in the second embodiment.
Fig. 7 is a schematic structural view of a middle rotor core in the third embodiment.
Fig. 8 is a schematic view of a structure of a positioning permanent magnet in the third embodiment.
The following figures are shown:
rotor core 1, positioning protrusion 1.1,
Positioning permanent magnet 2, positioning groove 2.1,
Non-positioning permanent magnet 3, rotor punching sheet 4, and positioning sheet 5.
Detailed Description
In order to make the purposes, technical solutions and advantages of the technical solution embodiments of the present utility model more clear, the present utility model is further described below with reference to the accompanying drawings and the detailed description.
An embodiment I, a positioning magnetic steel rotor structure as shown in fig. 1, 2, 3 and 4, comprises a rotor core 1, wherein a plurality of permanent magnets are attached to the outer side wall of the rotor core 1, the permanent magnets are distributed circumferentially according to the central axis of the rotor core 1, each permanent magnet comprises a positioning permanent magnet 2 and a non-positioning permanent magnet 3, a positioning groove 2.1 is formed in the inner side wall of the positioning permanent magnet 2, a positioning protrusion 1.1 is arranged on the outer side wall of the rotor core 1, the positioning protrusion 1.1 is matched with the positioning groove 2.1, and two adjacent permanent magnets are abutted. The depth of the positioning groove 2.1 is larger than the height of the positioning protrusion 1.1. The gap between the permanent magnet and the rotor core 1 is reduced. The inner side wall of the permanent magnet is attached to the outer side wall of the rotor core 1, the inner side wall of the permanent magnet is a cylindrical surface, the outer side wall of the rotor core 1 is a cylindrical surface, and the radius of the inner side wall of the cylindrical surface on the permanent magnet is equal to the radius of the outer side wall of the cylindrical surface on the rotor core 1. So that the permanent magnets are entirely attached to the outer side wall of the rotor core 1. The outer side wall of the permanent magnet is a cylindrical surface, the radius of the outer side wall of the cylindrical surface on the permanent magnet is smaller than the radius of the inner side wall of the cylindrical surface on the permanent magnet, and the thickness of the cross section of the permanent magnet gradually becomes thinner from the middle to two sides. Torque ripple and noise of the rotor motor are reduced. One side surface of the abutting fit of two adjacent permanent magnets extends through the central axis of the rotor core 1.
In the positioning magnetic steel rotor structure described in the above embodiment, the positioning protrusion 1.1 is provided on the outer side wall of the rotor core 1 for limiting and positioning the permanent magnet 2, and then the non-positioning permanent magnet 3 is sequentially attached to the outer side wall of the rotor core 1. The processing of magnetic steel positions and magnetism isolating bridges is omitted, the processing cost and the processing difficulty of the rotor motor are reduced, and meanwhile, the accurate positioning of the permanent magnets is completed. Adjacent two permanent magnets are abutted, so that an air gap between the adjacent permanent magnets is reduced, magnetic pole leakage caused by a magnetic isolation bridge is avoided, and the service performance of the motor and the utilization rate of the permanent magnets are improved. The positioning groove 2.1 is arranged on the positioning permanent magnet 2, so that the use amount of the permanent magnet is reduced, the performance is ensured, and the cost is reduced. The permanent magnet positioning structure solves the problems that the processing cost of a motor rotor is increased, an air gap exists between two adjacent permanent magnets, larger magnetic leakage can be generated, and the utilization rate of the permanent magnets is reduced by milling a plurality of planes on the periphery of a rotor core 1 to serve as magnetic steel positions for placing the permanent magnets.
Further, as shown in fig. 1, the central angle occupied by the positioning permanent magnet 2 is 53.75 °, and the central angle occupied by the non-positioning permanent magnet 3 is 43.75 °. The permanent magnets with different sizes are adopted, so that the cogging torque can be greatly reduced, and the motor vibration can be reduced. The permanent magnets are divided into N-pole permanent magnets and S-pole permanent magnets, and the N-pole permanent magnets and the S-pole permanent magnets are alternately arranged along the circumferential direction. A proper amount of glue is coated on the outer side wall of the rotor core 1, a positioning groove 2.1 of a positioning permanent magnet 2 of an N pole is combined with a positioning bulge of the rotor core 1, a non-positioning permanent magnet 3 of an S pole is attached next to the positioning permanent magnet 2, and then the rest permanent magnets are attached according to the sequence of N-S-N; grinding the excircle rotor to the required size, sleeving a carbon fiber sleeve, and flattening the two ends.
Further, as shown in fig. 2, the rotor core 1 is composed of a plurality of rotor laminations 4 stacked in the axial direction.
Further, as shown in fig. 2, 3 and 4, the outer edge of the rotor punching sheet 4 is provided with a positioning sheet 5 extending outwards, and the positioning sheet 5 is overlapped to form a limiting protrusion, and the limiting protrusion is distributed along the central axis direction of the rotor core 1.
In a second embodiment, a positioning magnetic steel rotor structure as shown in fig. 1, 2, 5 and 6 comprises a rotor core 1, a plurality of permanent magnets are attached to the outer side wall of the rotor core 1, the permanent magnets are circumferentially distributed according to the central axis of the rotor core 1, each permanent magnet comprises a positioning permanent magnet 2 and a non-positioning permanent magnet 3, a positioning groove 2.1 is formed in the inner side wall of the positioning permanent magnet 2, a positioning protrusion 1.1 is arranged on the outer side wall of the rotor core 1, the positioning protrusion 1.1 is matched with the positioning groove 2.1, and two adjacent permanent magnets are abutted. The depth of the positioning groove 2.1 is larger than the height of the positioning protrusion 1.1. The gap between the permanent magnet and the rotor core 1 is reduced. The inner side wall of the permanent magnet is attached to the outer side wall of the rotor core 1, the inner side wall of the permanent magnet is a cylindrical surface, the outer side wall of the rotor core 1 is a cylindrical surface, and the radius of the inner side wall of the cylindrical surface on the permanent magnet is equal to the radius of the outer side wall of the cylindrical surface on the rotor core 1. So that the permanent magnets are entirely attached to the outer side wall of the rotor core 1. The outer side wall of the permanent magnet is a cylindrical surface, the radius of the outer side wall of the cylindrical surface on the permanent magnet is smaller than the radius of the inner side wall of the cylindrical surface on the permanent magnet, and the thickness of the cross section of the permanent magnet gradually becomes thinner from the middle to two sides. Torque ripple and noise of the rotor motor are reduced. One side surface of the abutting fit of two adjacent permanent magnets extends through the central axis of the rotor core 1.
In the positioning magnetic steel rotor structure described in the above embodiment, the positioning protrusion 1.1 is provided on the outer side wall of the rotor core 1 for limiting and positioning the permanent magnet 2, and then the non-positioning permanent magnet 3 is sequentially attached to the outer side wall of the rotor core 1. The processing of magnetic steel positions and magnetism isolating bridges is omitted, the processing cost and the processing difficulty of the rotor motor are reduced, and meanwhile, the accurate positioning of the permanent magnets is completed. Adjacent two permanent magnets are abutted, so that an air gap between the adjacent permanent magnets is reduced, magnetic pole leakage caused by a magnetic isolation bridge is avoided, and the service performance of the motor and the utilization rate of the permanent magnets are improved. The positioning groove 2.1 is arranged on the positioning permanent magnet 2, so that the use amount of the permanent magnet is reduced, the performance is ensured, and the cost is reduced.
Further, as shown in fig. 1, the central angle occupied by the positioning permanent magnet 2 is 53.75 °, and the central angle occupied by the non-positioning permanent magnet 3 is 43.75 °. The permanent magnets with different sizes are adopted, so that the cogging torque can be greatly reduced, and the motor vibration can be reduced. The permanent magnets are divided into N-pole permanent magnets and S-pole permanent magnets, and the N-pole permanent magnets and the S-pole permanent magnets are alternately arranged along the circumferential direction. A proper amount of glue is coated on the outer side wall of the rotor core 1, a positioning groove 2.1 of a positioning permanent magnet 2 of an N pole is combined with a positioning bulge of the rotor core 1, a non-positioning permanent magnet 3 of an S pole is attached next to the positioning permanent magnet 2, and then the rest permanent magnets are attached according to the sequence of N-S-N; grinding the excircle rotor to the required size, sleeving a carbon fiber sleeve, and flattening the two ends.
Further, as shown in fig. 2, the rotor core 1 is composed of a plurality of rotor laminations 4 stacked in the axial direction.
Further, as shown in fig. 2, 5 and 6, the outer edge of the rotor punching sheet 4 located in the middle of the rotor core 1 is provided with a positioning sheet 5 extending outwards, the positioning sheet 5 is overlapped to form a limiting protrusion, the limiting protrusion is distributed along the central axis direction of the rotor core 1, the limiting protrusion is located in the middle of the rotor core 1, and the positioning groove 2.1 is located in the middle of the positioning permanent magnet 2. The positioning bulge 1.1 is matched with the positioning groove 2.1, and the installation position of the permanent magnet 2 is limited and positioned in the axial direction and the circumferential direction, so that the permanent magnet is positioned more accurately.
Embodiment III, a positioning type magnetic steel rotor structure as shown in fig. 1, 2, 7 and 8 comprises a rotor core 1, wherein a plurality of permanent magnets are attached to the outer side wall of the rotor core 1 and distributed circumferentially according to the central axis of the rotor core 1, each permanent magnet comprises a positioning permanent magnet 2 and a non-positioning permanent magnet 3, a positioning groove 2.1 is formed in the inner side wall of the positioning permanent magnet 2, a positioning protrusion 1.1 is arranged on the outer side wall of the rotor core 1, the positioning protrusion 1.1 is matched with the positioning groove 2.1, and two adjacent permanent magnets are abutted. The depth of the positioning groove 2.1 is larger than the height of the positioning protrusion 1.1. The gap between the permanent magnet and the rotor core 1 is reduced. The inner side wall of the permanent magnet is attached to the outer side wall of the rotor core 1, the inner side wall of the permanent magnet is a cylindrical surface, the outer side wall of the rotor core 1 is a cylindrical surface, and the radius of the inner side wall of the cylindrical surface on the permanent magnet is equal to the radius of the outer side wall of the cylindrical surface on the rotor core 1. So that the permanent magnets are entirely attached to the outer side wall of the rotor core 1. The outer side wall of the permanent magnet is a cylindrical surface, the radius of the outer side wall of the cylindrical surface on the permanent magnet is smaller than the radius of the inner side wall of the cylindrical surface on the permanent magnet, and the thickness of the cross section of the permanent magnet gradually becomes thinner from the middle to two sides. Torque ripple and noise of the rotor motor are reduced. One side surface of the abutting fit of two adjacent permanent magnets extends through the central axis of the rotor core 1.
In the positioning magnetic steel rotor structure described in the above embodiment, the positioning protrusion 1.1 is provided on the outer side wall of the rotor core 1 for limiting and positioning the permanent magnet 2, and then the non-positioning permanent magnet 3 is sequentially attached to the outer side wall of the rotor core 1. The processing of magnetic steel positions and magnetism isolating bridges is omitted, the processing cost and the processing difficulty of the rotor motor are reduced, and meanwhile, the accurate positioning of the permanent magnets is completed. Adjacent two permanent magnets are abutted, so that an air gap between the adjacent permanent magnets is reduced, magnetic pole leakage caused by a magnetic isolation bridge is avoided, and the service performance of the motor and the utilization rate of the permanent magnets are improved. The positioning groove 2.1 is arranged on the positioning permanent magnet 2, so that the use amount of the permanent magnet is reduced, the performance is ensured, and the cost is reduced.
Further, as shown in fig. 1, the central angle occupied by the positioning permanent magnet 2 is 53.75 °, and the central angle occupied by the non-positioning permanent magnet 3 is 43.75 °. The permanent magnets with different sizes are adopted, so that the cogging torque can be greatly reduced, and the motor vibration can be reduced. The permanent magnets are divided into N-pole permanent magnets and S-pole permanent magnets, and the N-pole permanent magnets and the S-pole permanent magnets are alternately arranged along the circumferential direction. A proper amount of glue is coated on the outer side wall of the rotor core 1, a positioning groove 2.1 of a positioning permanent magnet 2 of an N pole is combined with a positioning bulge of the rotor core 1, a non-positioning permanent magnet 3 of an S pole is attached next to the positioning permanent magnet 2, and then the rest permanent magnets are attached according to the sequence of N-S-N; grinding the excircle rotor to the required size, sleeving a carbon fiber sleeve, and flattening the two ends.
Further, as shown in fig. 2, the rotor core 1 is composed of a plurality of rotor laminations 4 stacked in the axial direction.
Further, as shown in fig. 2, 7 and 8, the outer edge of the rotor punching sheet 4 at the end of the rotor core 1 is provided with a positioning sheet 5 extending outwards, the positioning sheet 5 is overlapped to form a limiting protrusion, the limiting protrusion is distributed along the central axis direction of the rotor core 1, the limiting protrusion is located at the end of the outer side wall of the rotor core 1, the positioning groove 2.1 is located at the end of the inner side wall of the permanent magnet, and the positioning groove 2.1 is communicated with the end face of the permanent magnet. The positioning bulge 1.1 is matched with the positioning groove 2.1, and the installation position of the permanent magnet 2 is limited and positioned in the axial direction and the circumferential direction, so that the permanent magnet is positioned more accurately. The positioning groove 2.1 at the end part is convenient to process, and the positioning permanent magnet 2 is pressed and positioned when the positioning permanent magnet 2 is attached.
The utility model has the following beneficial effects: (1) The processing of magnetic steel positions and magnetism isolating bridges are omitted, the processing cost and the processing difficulty of the rotor motor are reduced, and meanwhile, the accurate positioning of the permanent magnets is completed; (2) The air gap between the adjacent permanent magnets is reduced, the magnetic pole leakage phenomenon caused by a magnetic isolation bridge is avoided, and the service performance of the motor and the utilization rate of the permanent magnets are improved.
The above embodiments are merely preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model. All equivalent changes in shape and structure according to the present utility model are intended to be included in the scope of the present utility model.
Claims (10)
1. The utility model provides a location formula magnet steel rotor structure, includes rotor core (1), its characterized in that, paste on rotor core's the lateral wall and set up a plurality of permanent magnets, the permanent magnet is circumference distribution according to rotor core's central axis, the permanent magnet includes location permanent magnet (2) and non-location permanent magnet (3), be equipped with constant head tank (2.1) on the inside wall of location permanent magnet, be equipped with location arch (1.1) on rotor core's the lateral wall, the location arch with the constant head tank cooperation, two adjacent permanent magnet butt.
2. The positioning type magnetic steel rotor structure according to claim 1, wherein the depth of the positioning groove is larger than the height of the positioning protrusion.
3. The positioning magnetic steel rotor structure according to claim 2, wherein the inner side wall of the permanent magnet is attached to the outer side wall of the rotor core, the inner side wall of the permanent magnet is cylindrical, the outer side wall of the rotor core is cylindrical, and the radius of the inner side wall of the cylindrical surface of the permanent magnet is equal to the radius of the outer side wall of the cylindrical surface of the rotor core.
4. The positioning type magnetic steel rotor structure according to claim 3, wherein the outer side wall of the permanent magnet is cylindrical, the radius of the outer side wall of the cylindrical surface of the permanent magnet is smaller than the radius of the inner side wall of the cylindrical surface of the permanent magnet, and the thickness of the cross section of the permanent magnet is gradually thinned from the middle to two sides.
5. A positioning magnetic steel rotor structure according to claim 1, 2, 3 or 4, wherein the central angle occupied by the positioning permanent magnet is 53.75 ° and the central angle occupied by the non-positioning permanent magnet is 43.75 °.
6. A positioning type magnetic steel rotor structure according to claim 1 or 2 or 3 or 4, wherein the permanent magnets are divided into N-pole permanent magnets and S-pole permanent magnets, which are alternately arranged in the circumferential direction.
7. A positioning magnetic steel rotor structure according to claim 1 or 2 or 3 or 4, characterized in that the rotor core consists of a number of axially laminated rotor laminations (4).
8. The positioning type magnetic steel rotor structure according to claim 7, wherein positioning pieces (5) extending outwards are arranged on the outer edges of the rotor punching pieces, the positioning pieces are overlapped to form limiting protrusions, and the limiting protrusions are distributed along the central axis direction of the rotor core.
9. The positioning type magnetic steel rotor structure according to claim 7, wherein the outer edge of the rotor punching sheet positioned in the middle of the rotor core is provided with positioning sheets extending outwards, the positioning sheets are overlapped to form limiting protrusions, the limiting protrusions are distributed along the central axis direction of the rotor core, the limiting protrusions are positioned in the middle of the rotor core, and the positioning grooves are positioned in the middle of the positioning permanent magnets.
10. The positioning type magnetic steel rotor structure according to claim 7, wherein the outer edge of the rotor punching sheet positioned at the end part of the rotor core is provided with positioning sheets extending outwards, the positioning sheets are overlapped to form limiting protrusions, the limiting protrusions are distributed along the central axis direction of the rotor core, the limiting protrusions are positioned at the end part of the outer side wall of the rotor core, the positioning grooves are positioned at the end part of the inner side wall of the permanent magnet, and the positioning grooves are communicated with the end surface of the permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321370903.XU CN220139302U (en) | 2023-05-31 | 2023-05-31 | Positioning type magnetic steel rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321370903.XU CN220139302U (en) | 2023-05-31 | 2023-05-31 | Positioning type magnetic steel rotor structure |
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| Publication Number | Publication Date |
|---|---|
| CN220139302U true CN220139302U (en) | 2023-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321370903.XU Active CN220139302U (en) | 2023-05-31 | 2023-05-31 | Positioning type magnetic steel rotor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220139302U (en) |
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2023
- 2023-05-31 CN CN202321370903.XU patent/CN220139302U/en active Active
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