CN212969217U - Low cogging torque rotor assembly - Google Patents
Low cogging torque rotor assembly Download PDFInfo
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- CN212969217U CN212969217U CN202021960959.7U CN202021960959U CN212969217U CN 212969217 U CN212969217 U CN 212969217U CN 202021960959 U CN202021960959 U CN 202021960959U CN 212969217 U CN212969217 U CN 212969217U
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- magnetic steel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model discloses a low tooth space torque rotor component, which comprises a rotor shell and magnetic steel, wherein the rotor shell is provided with a plurality of groups of magnetic steel grooves, the magnetic steel is arranged in the magnetic steel grooves, each group of magnetic steel grooves is in a V shape and respectively consists of a first magnetic steel groove, a second magnetic steel groove and a third magnetic steel groove which are sequentially stacked from big to small along the radial direction and are far away from the axial direction of the rotor shell, and the bell mouths of the first magnetic steel groove, the second magnetic steel groove and the third magnetic steel groove are back to the axial direction of the rotor shell, the magnetic steel is a plurality of groups of V-shaped magnetic steels corresponding to the magnetic steel grooves, the low tooth space torque rotor component greatly reduces the tooth space torque of a motor, improves the starting and running performances of the motor and further reduces the electromagnetic noise, and simultaneously has the advantages of good counter potential sine degree, wide speed regulation range and the like, can meet the operation requirement of the electric automobile.
Description
Technical Field
The utility model relates to a motor manufacturing field especially relates to a low tooth's socket torque rotor subassembly.
Background
In order to reduce the axial size of the current new energy hybrid electric vehicle, a fractional slot concentrated winding permanent magnet synchronous motor is used as a driving motor in a multi-choice mode, and compared with an integer slot, the fractional slot concentrated winding permanent magnet synchronous motor has the characteristics of short winding end part, simple wire embedding mode, low copper consumption and the like, but the fractional slot concentrated winding permanent magnet synchronous motor can generate electromagnetic force with lower modulus, so that the vibration and noise of the motor are aggravated, the tooth space torque is increased, and the driving quality of the whole vehicle is greatly influenced.
In practical production application, certain methods can be adopted to reduce noise, such as adjusting bearing play and increasing an external noise reduction cover, the methods are not fundamental to the primary and secondary, and also certain methods can be adopted to reduce cogging torque, such as properly reducing notch distance, or adding auxiliary grooves on stator punching teeth, such as an auxiliary groove stator punching sheet, a stator assembly, a motor and a compressor with the patent number of CN201910806200.9, the auxiliary grooves are arranged at groove shoulders, the design can reduce the cogging torque to a certain extent, but the effect is not obvious, and the strength of the stator punching sheet is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: in order to overcome the defects of the prior art, the low-cogging-torque rotor assembly is good in back electromotive force sine degree, small in cogging torque, wide in speed regulation range and low in noise.
The utility model provides a technical scheme that above-mentioned technical problem took is: the utility model provides a low cogging torque rotor subassembly, includes rotor housing and magnet steel, rotor housing has seted up a plurality of groups magnetic steel groove, the magnet steel sets up in the magnetic steel groove.
In order to reduce the tooth's socket torque, reduce electromagnetic noise simultaneously, each group the magnet steel groove is the V type, respectively by along radial and keeping away from rotor shell axis direction, by big to little first magnet steel groove, second magnet steel groove and the third magnet steel groove that stacks gradually constitute, the horn mouth in first magnet steel groove, second magnet steel groove and third magnet steel groove dorsad rotor shell axis direction, the magnet steel be a plurality of groups with the V type magnet steel that the magnet steel groove corresponds.
Preferably, a plurality of groups of the magnetic steel grooves are uniformly distributed along the reference circle of the rotor shell.
Preferably, the magnetic steel grooves have 6 groups, the magnetic steels correspondingly have 6 groups, and more or less magnetic steel grooves and magnetic steels can be designed according to actual conditions.
The utility model has the advantages that: this low cogging torque rotor subassembly is a utmost point rotor structure through designing 3V type magnetic steel grooves, greatly reduced the cogging torque of motor, improved the start-up and the running performance of motor to further reduce electromagnetic noise, this low cogging torque rotor subassembly has advantages such as the back electromotive force sine is good, the speed governing scope is wide simultaneously, can satisfy electric automobile's operation requirement.
Drawings
Fig. 1 is a schematic structural view of the low cogging torque rotor assembly of the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be clearly and clearly defined. In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc. refer to directions of the attached drawings only. Accordingly, the directional terms used are used for describing and understanding the present invention, and are not used for limiting the present invention.
As shown in fig. 1, a low cogging torque rotor subassembly, including rotor housing 1 and magnet steel 2, rotor housing 1 has been seted up 6 groups magnetic steel groove 11, follows 1 reference circle evenly distributed of rotor housing, magnet steel 2 sets up in the magnetic steel groove 11, each group magnetic steel groove 11 is the V type, by along radial and keeping away from respectively 1 axis direction of rotor housing, by big-to-little first magnetic steel groove 111, second magnetic steel groove 112 and the third magnetic steel groove 113 that stacks gradually constitute, the horn mouth of first magnetic steel groove 111, second magnetic steel groove 112 and third magnetic steel groove 113 is dorsad 1 axis direction of rotor housing, magnet steel 2 be 6 groups with the V type magnet steel that magnetic steel groove 11 corresponds.
When the rotor assembly is designed, firstly, a more proper slot pole proportion and a winding connection mode are selected through the analytical research of a winding theory, then a V-shaped rotor structure is provided on the basis, namely, the rotor shell 1 uniformly distributed with the V-shaped magnetic steel slots adopts a rotor structure with 3V-shaped magnetic steel slots as one pole, the electromagnetic characteristic analysis is carried out on the motor through finite element analysis software, and the influence of the permanent magnet position of the V-shaped built-in permanent magnet synchronous motor on the cogging torque is intensively researched; the torque speed characteristic curve of the motor is obtained through a maximum torque or current control method so as to further research the running characteristic of the motor. Finally, tests prove that the rotor assembly with the structure adopts radial magnetization in a matching manner, so that the cogging torque of the motor is reduced, the starting and running performance of the motor is improved, and the electromagnetic noise is further reduced.
The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. The utility model provides a low cogging torque rotor subassembly, includes rotor housing (1) and magnet steel (2), a plurality of groups magnetic steel groove (11) have been seted up in rotor housing (1), magnet steel (2) set up in magnetic steel groove (11), its characterized in that: every group magnetism steel slot (11) are the V type, respectively by along radial and keeping away from rotor housing (1) axis direction, by big first magnetism steel slot (111), second magnetism steel slot (112) and third magnetism steel slot (113) that stack gradually little, the horn mouth in first magnetism steel slot (111), second magnetism steel slot (112) and third magnetism steel slot (113) dorsad rotor housing (1) axis direction, magnet steel (2) be a plurality of groups with the V type magnet steel that magnetism steel slot (11) corresponds.
2. The low cogging torque rotor assembly of claim 1, wherein: the magnetic steel grooves (11) of the plurality of groups are uniformly distributed along the reference circle of the rotor shell (1).
3. The low cogging torque rotor assembly of claim 1, wherein: the magnetic steel groove (11) is provided with 6 groups, and the magnetic steel (2) is correspondingly provided with 6 groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021960959.7U CN212969217U (en) | 2020-09-09 | 2020-09-09 | Low cogging torque rotor assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021960959.7U CN212969217U (en) | 2020-09-09 | 2020-09-09 | Low cogging torque rotor assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212969217U true CN212969217U (en) | 2021-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021960959.7U Active CN212969217U (en) | 2020-09-09 | 2020-09-09 | Low cogging torque rotor assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212969217U (en) |
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2020
- 2020-09-09 CN CN202021960959.7U patent/CN212969217U/en active Active
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