WO2023284219A1 - Rotor punching sheet of permanent magnet motor for use in vehicle and inclined pole structure thereof - Google Patents
Rotor punching sheet of permanent magnet motor for use in vehicle and inclined pole structure thereof Download PDFInfo
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- WO2023284219A1 WO2023284219A1 PCT/CN2021/132292 CN2021132292W WO2023284219A1 WO 2023284219 A1 WO2023284219 A1 WO 2023284219A1 CN 2021132292 W CN2021132292 W CN 2021132292W WO 2023284219 A1 WO2023284219 A1 WO 2023284219A1
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- WIPO (PCT)
- Prior art keywords
- punching sheet
- rotating shaft
- permanent magnet
- grooves
- magnet motor
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- 238000004080 punching Methods 0.000 title claims abstract description 51
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 31
- 239000010959 steel Substances 0.000 claims abstract description 31
- 238000002955 isolation Methods 0.000 claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 claims 2
- 239000000463 material Substances 0.000 description 7
- 230000004907 flux Effects 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 6
- 230000035699 permeability Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
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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
Definitions
- the invention belongs to the technical field of electric motors, and in particular relates to a rotor punching sheet of a permanent magnet electric motor for a vehicle and an oblique pole structure thereof.
- the permanent magnet synchronous motor is a synchronous motor that generates a synchronous rotating magnetic field through the excitation of permanent magnets. Compared with the AC asynchronous motor, the permanent magnet synchronous motor has higher efficiency and smaller volume, and can better play the advantages of energy saving and emission reduction of new energy vehicles. Therefore, new energy vehicles often use permanent magnet synchronous motors.
- the rotor laminations of permanent magnet synchronous motors for vehicles are generally of integral design, and the inclined pole structure of the rotor is generally realized by using a variety of rotor laminations, and the same oblique pole structure is relatively single, and the oblique pole structure is fixed. It is one of "one-shaped" or "V-shaped".
- the present invention provides a rotor punch of a permanent magnet motor for a vehicle and its oblique pole structure.
- a permanent magnet motor rotor stamping sheet for a vehicle comprising an inner punching sheet and an outer punching sheet, the center of the inner punching sheet is provided with a rotating shaft installation hole for fixing and installing a rotating shaft, and the side wall of the rotating shaft installation hole is provided with A plurality of rotating shaft matching keyways evenly distributed in the circumferential direction, the rotating shaft is provided with at least one rotating shaft matching key extending axially along the rotating shaft, the rotating shaft matching key is interference fit with the rotating shaft matching keyway, the inner The outer wall of the punch is provided with a plurality of matching keys, and the inner wall of the outer punch is provided with corresponding matching key grooves, and the inner punch and the outer punch are interfering with each other through the matching keys and the matching key grooves.
- the outer punching sheet is provided with a circle of first magnetic steel grooves distributed in the inner layer and an equal amount of second magnetic steel grooves distributed in the outer layer, and the outer punching sheet is on the outer wall in the direction of the straight axis There is a straight axis groove, and the outer punch is provided with an orthogonal axis groove on the outer wall in the direction of the orthogonal axis.
- the number of the straight-axis grooves is equal to the number of motor poles
- the number of the quadrature-axis grooves is also equal to the number of motor poles
- the straight-axis grooves and the quadrature-axis grooves are arranged alternately.
- the first magnetic steel grooves are "V-shaped" distributed in pairs, and the paired two first magnetic steel grooves are symmetrically distributed along the radial direction of the outer punching sheet.
- the second magnetic steel grooves are distributed in pairs in a "line shape", and the paired two second magnetic steel grooves are symmetrically distributed along the radial direction of the outer punching sheet.
- the gap between the bottoms of the paired two first magnetic steel slots is a first magnetic isolation bridge, and the width of the first magnetic isolation bridge is 1-2mm, and the paired two second magnetic steel slots
- the gap between the magnetic steel grooves is the second magnetic isolation bridge, and the width of the second magnetic isolation bridge is 0.7-1.2 mm.
- the straight-axis groove is an arc-shaped groove, and the radius of the straight-axis groove is 1.1-1.5 times the width of the first magnetic isolation bridge.
- the cross-axis groove is an arc-shaped groove, and the radius of the cross-axis groove is 1.1-1.5 times the width of the second magnetic isolation bridge.
- the outer punch is made of silicon steel, and the inner punch is made of aluminum.
- An oblique pole structure of a permanent magnet motor for a vehicle adopting the above-mentioned permanent magnet motor rotor stamping for a vehicle, including a rotating shaft and a number of permanent magnet motor rotor stampings for a vehicle that are sleeved on the rotating shaft through a shaft mounting hole, the rotating shaft cooperates with
- the keys are interference-fitted with the shafts at different angles on the inner punch to achieve multi-segment oblique poles of the rotor in a "line", "V” or "ZigZag” shape.
- the number of matching keyways of the rotating shaft is greater than or equal to the number of subsections of the multi-section oblique poles of the rotor.
- the rotor punch of the present invention adopts the combined form of the inner punch and the outer punch, and the outer wall of the outer punch is provided with a straight-axis groove and a cross-axis groove, which help to reduce the torque ripple of the motor and reduce the electromagnetic force of the motor;
- the second magnetic steel slots in the present invention are arranged in pairs of "one-shaped".
- This two-section one-shaped structure is different from the existing integral one-shaped structure, which can effectively reduce the generation of magnetic field leakage flux and improve The material utilization rate of permanent magnet is improved, and cost is reduced;
- the outer punching sheet among the present invention adopts the silicon steel material of high magnetic permeability, and the inner punching sheet adopts the high hardness aluminum type material of low magnetic permeability, wherein the outer punching sheet helps to guarantee permanent magnet The main magnetic flux of the magnetic field will not be weakened to ensure the output performance of the motor.
- the aluminum material used in the inner punching sheet has a low density, which greatly reduces the overall weight of the rotor, ensures the strength of the rotor, and reduces the leakage of the permanent magnet magnetic field.
- the magnetic flux is generated, which improves the power density of the motor; the invention can realize the inclined pole structure with different inclined pole angles through the interference fit of the rotating shaft matching key and a plurality of rotating shaft matching key grooves of different angles on the inner punching sheet, such as "one-shaped", “V-type” or “ZigZag-type” rotor with multi-segment skew.
- Fig. 1 is a schematic structural view of a rotor punch of the present invention
- Fig. 2 is the structural representation of the outer punch of the present invention
- Fig. 3 is a schematic structural view of the inner punching sheet of the present invention.
- Fig. 4 is a schematic structural view of the rotating shaft of the present invention.
- Fig. 5 is a schematic diagram of the assembly of a single rotor punch and a rotating shaft of the present invention
- Fig. 6 is a schematic diagram of the oblique pole structure of the present invention.
- the marks in the figure are: 1. Inner punch; 11. Shaft installation hole; 12. Shaft matching keyway; 13. Cooperating key; 2. Outer punching piece; 21. Cooperating keyway; 22. First magnetic steel groove; 23. No. Two magnetic steel grooves; 24, straight axis grooves; 25, cross axis grooves; 26, the first magnetic isolation bridge; 27, the second magnetic isolation bridge; 3, rotating shaft; 31, rotating shaft matching key.
- a permanent magnet motor rotor stamping sheet for a vehicle includes an inner punching sheet 1 and an outer punching sheet 2, and the center of the inner punching sheet 1 is provided with a rotating shaft installation hole 11 for fixing and installing the rotating shaft 3
- the side wall of the shaft mounting hole 11 is provided with a plurality of shaft matching keyways 12 evenly distributed in the circumferential direction, and the shaft 3 is provided with at least one shaft matching key 31 extending axially along the shaft 3, and the shaft matching key 31 is matched with the shaft
- the keyway 12 is interference fit, and the outer wall of the inner punch 1 is provided with a plurality of matching keys 13, and the inner wall of the outer punch 2 is provided with a corresponding matching keyway, and the inner punch 1 and the outer punch 2 are matched by the matching keys 13. Keyway interference fit for a secure connection.
- the outer punching sheet 2 is provided with a circle of first magnetic steel grooves 22 distributed in an inner layer and an equal amount of second magnetic steel grooves 23 distributed in a circle of outer layers.
- the first magnetic steel grooves 22 are distributed in pairs in a "V shape”.
- the second magnetic steel grooves 23 are distributed in pairs in a "line shape", and the paired two first magnetic steel grooves 22 are distributed symmetrically along the radial direction of the outer punching sheet 2, and the paired two first magnetic steel grooves 22
- the gap between the bottoms is the first magnetic isolation bridge 26, the width of the first magnetic isolation bridge 26 is 1-2 mm, and the pair of second magnetic steel grooves 23 are distributed symmetrically along the radial direction of the outer punching sheet 2 , the gap between the paired second magnetic steel grooves 23 is the second magnetic isolation bridge 27, the width of the second magnetic isolation bridge 27 is 0.7-1.2mm, this two-section inline structure is different from the existing
- the integrated one-shaped structure can effectively reduce the generation of magnetic field leakage flux, improve the material
- the outer punching sheet 2 is provided with a straight axis groove 24 on the outer wall in the direction of the direct axis, and the outer punching sheet 2 is provided with an orthogonal axis groove 25 on the outer wall in the direction of the orthogonal axis, and the number of the straight axis grooves 24 is equal to that of the motor pole.
- the number of quadrature-axis grooves 25 is also equal to the number of motor poles, and the straight-axis grooves 24 and the quadrature-axis grooves 25 are arranged alternately, the straight-axis grooves 24 and the quadrature-axis grooves 25 are arc-shaped grooves, straight
- the radius of the shaft groove 24 is 1.1-1.5 times the width of the first magnetic isolation bridge 26, the radius of the orthogonal axis groove 25 is 1.1-1.5 times the width of the second magnetic isolation bridge 27, the straight axis groove 24 and the intersection
- the setting of the shaft groove 25 helps to reduce the torque ripple of the motor and reduce the electromagnetic force of the motor.
- the outer punch 2 is made of silicon steel with high magnetic permeability
- the inner punch 1 is made of high-hardness aluminum material with low magnetic permeability.
- the outer punch 2 helps to ensure that the main magnetic flux of the permanent magnet field will not weaken and ensure the output of the motor.
- the aluminum material used in the inner punching plate 1 has a low density, which greatly reduces the overall weight of the rotor, ensures the strength of the rotor, reduces the leakage flux of the permanent magnet magnetic field, and improves the power density of the motor.
- a vehicle permanent magnet motor oblique pole structure adopts the above-mentioned vehicle permanent magnet motor rotor stamping, including a rotating shaft 3 and 7 vehicle permanent magnet motors that are sleeved on the rotating shaft 3 through the rotating shaft mounting holes 11 Rotor punching, the number of shaft matching key grooves 12 is greater than or equal to the number of subsections of the multi-stage oblique poles of the rotor, and the angle between two adjacent shaft matching key slots 12 radial symmetry lines is determined by the angle of the oblique poles of the rotor segments.
- the key 31 is interference-fitted with a plurality of shafts with different angles on the inner punch 1 to cooperate with the key groove 12 to realize oblique pole structures with different oblique pole angles, such as "V-shaped” rotors with multiple oblique poles, or "one-shaped” or " ZigZag type” rotor with multi-segment oblique poles.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
本发明属于电机技术领域，具体涉及一种车用永磁电机转子冲片及其斜极结构。The invention belongs to the technical field of electric motors, and in particular relates to a rotor punching sheet of a permanent magnet electric motor for a vehicle and an oblique pole structure thereof.
永磁同步电机是由永磁铁励磁产生同步旋转磁场的同步电机，永磁同步电机相对于交流异步电机，具有效率更高、体积更小，能更好地发挥新能源汽车节能减排的优势，因而新能源汽车常采用永磁同步电机。目前，车用永磁同步电机的转子冲片一般都是整体式设计，转子的斜极结构一般是利用多种转子冲片实现，且同一种斜极结构比较单一，斜极结构方式固定，一般是“一字型”或者“V型”其中一种。The permanent magnet synchronous motor is a synchronous motor that generates a synchronous rotating magnetic field through the excitation of permanent magnets. Compared with the AC asynchronous motor, the permanent magnet synchronous motor has higher efficiency and smaller volume, and can better play the advantages of energy saving and emission reduction of new energy vehicles. Therefore, new energy vehicles often use permanent magnet synchronous motors. At present, the rotor laminations of permanent magnet synchronous motors for vehicles are generally of integral design, and the inclined pole structure of the rotor is generally realized by using a variety of rotor laminations, and the same oblique pole structure is relatively single, and the oblique pole structure is fixed. It is one of "one-shaped" or "V-shaped".
发明内容Contents of the invention
针对上述存在的技术问题，本发明提供一种车用永磁电机转子冲片及其斜极结构。In view of the above-mentioned technical problems, the present invention provides a rotor punch of a permanent magnet motor for a vehicle and its oblique pole structure.
本发明的技术方案为：Technical scheme of the present invention is:
一种车用永磁电机转子冲片，包括内冲片和外冲片，所述内冲片的中心处设有用于固定安装转轴的转轴安装孔，所述转轴安装孔的侧壁处设有多个周向均匀分布的转轴配合键槽，所述转轴上设有至少一个沿着所述转轴轴向延伸的转轴配合键，所述转轴配合键与所述转轴配合键槽过盈配合，所述内冲片的外壁处设有多个配合键，所述外冲片的内壁处设有对应的配合键槽，所述内冲片和所述外冲片通过所述配合键和所述配合键槽过盈配合进行固定连接；所述外冲片上设有一圈内层分布的第一磁钢槽以及等量的一圈外层分布的第二磁钢槽，所述外冲片在直轴方向的外壁上设有直轴凹槽，所述外冲片在交轴方向的外壁上设有交轴凹槽。A permanent magnet motor rotor stamping sheet for a vehicle, comprising an inner punching sheet and an outer punching sheet, the center of the inner punching sheet is provided with a rotating shaft installation hole for fixing and installing a rotating shaft, and the side wall of the rotating shaft installation hole is provided with A plurality of rotating shaft matching keyways evenly distributed in the circumferential direction, the rotating shaft is provided with at least one rotating shaft matching key extending axially along the rotating shaft, the rotating shaft matching key is interference fit with the rotating shaft matching keyway, the inner The outer wall of the punch is provided with a plurality of matching keys, and the inner wall of the outer punch is provided with corresponding matching key grooves, and the inner punch and the outer punch are interfering with each other through the matching keys and the matching key grooves. Cooperate for fixed connection; the outer punching sheet is provided with a circle of first magnetic steel grooves distributed in the inner layer and an equal amount of second magnetic steel grooves distributed in the outer layer, and the outer punching sheet is on the outer wall in the direction of the straight axis There is a straight axis groove, and the outer punch is provided with an orthogonal axis groove on the outer wall in the direction of the orthogonal axis.
优选的，所述直轴凹槽的数量等于电机极数，所述交轴凹槽的数量也等于电机极数，且所述直轴凹槽和所述交轴凹槽交替设置。Preferably, the number of the straight-axis grooves is equal to the number of motor poles, the number of the quadrature-axis grooves is also equal to the number of motor poles, and the straight-axis grooves and the quadrature-axis grooves are arranged alternately.
优选的，所述第一磁钢槽为“V型”成对分布，且成对的两个所述第一磁钢槽沿着所述外冲片的径向方向对称分布。Preferably, the first magnetic steel grooves are "V-shaped" distributed in pairs, and the paired two first magnetic steel grooves are symmetrically distributed along the radial direction of the outer punching sheet.
优选的，所述第二磁钢槽为“一字型”成对分布，且成对的两个所述第二磁钢槽沿着所述外冲片的径向方向对称分布。Preferably, the second magnetic steel grooves are distributed in pairs in a "line shape", and the paired two second magnetic steel grooves are symmetrically distributed along the radial direction of the outer punching sheet.
优选的，成对的两个所述第一磁钢槽底部之间的间隙为第一隔磁桥，所述第一隔磁桥的宽度为1-2mm，成对的两个所述第二磁钢槽之间的间隙为第二隔磁桥，所述第二隔磁桥的宽度为0.7-1.2mm。Preferably, the gap between the bottoms of the paired two first magnetic steel slots is a first magnetic isolation bridge, and the width of the first magnetic isolation bridge is 1-2mm, and the paired two second magnetic steel slots The gap between the magnetic steel grooves is the second magnetic isolation bridge, and the width of the second magnetic isolation bridge is 0.7-1.2 mm.
优选的，所述直轴凹槽为圆弧形凹槽，所述直轴凹槽的半径大小为所述第一隔磁桥的宽度1.1-1.5倍。Preferably, the straight-axis groove is an arc-shaped groove, and the radius of the straight-axis groove is 1.1-1.5 times the width of the first magnetic isolation bridge.
优选的，所述交轴凹槽为圆弧形凹槽，所述交轴凹槽的半径大小为所述第二隔磁桥的宽度1.1-1.5倍。Preferably, the cross-axis groove is an arc-shaped groove, and the radius of the cross-axis groove is 1.1-1.5 times the width of the second magnetic isolation bridge.
优选的，所述外冲片采用硅钢材料，所述内冲片采用铝型材料。Preferably, the outer punch is made of silicon steel, and the inner punch is made of aluminum.
一种车用永磁电机斜极结构，采用上述车用永磁电机转子冲片，包括转轴以及若干通过转轴安装孔套在所述转轴上的车用永磁电机转子冲片，所述转轴配合键与所述内冲片上多个不同角度的所述转轴配合键槽过盈配合以实现“一字型”、“V型”或者“ZigZag型”的转子多段斜极。An oblique pole structure of a permanent magnet motor for a vehicle, adopting the above-mentioned permanent magnet motor rotor stamping for a vehicle, including a rotating shaft and a number of permanent magnet motor rotor stampings for a vehicle that are sleeved on the rotating shaft through a shaft mounting hole, the rotating shaft cooperates with The keys are interference-fitted with the shafts at different angles on the inner punch to achieve multi-segment oblique poles of the rotor in a "line", "V" or "ZigZag" shape.
优选的，所述转轴配合键槽的数量大于或等于转子多段斜极的分段数量。Preferably, the number of matching keyways of the rotating shaft is greater than or equal to the number of subsections of the multi-section oblique poles of the rotor.
本发明的有益效果是：The beneficial effects of the present invention are:
本发明的转子冲片采用内冲片和外冲片组合形式，外冲片的外壁上设有直轴凹槽和交轴凹槽，有助于降低电机转矩脉动、减小电机电磁力；本发明中的第二磁钢槽为“一字型”成对分布，这种两段一字型结构区别于现有的整体式一字型结构，可以有效降低磁场漏磁通的产生，提高了永磁体的材料利用率，降低成本；本发明中的外冲片采用高导磁率的硅钢材料，内冲片采用低导磁率的高硬度铝型材料，其中外冲片有助于保证永磁体磁场主磁通不会减弱，保证电机的输出性能，内冲片采用的铝材材料密度较低，使得转子的整体重量大大减小，又保证了转子强度，也减小了永磁体磁场的漏磁通产生，提高了电机功率密度；本发明能够通过转轴配合键与内冲片上多个不同角度的转轴配合键槽过盈配合以实现不同斜极角度的斜极结构，比如“一字型”、“V型”或者“ZigZag型”的转子多段斜极。The rotor punch of the present invention adopts the combined form of the inner punch and the outer punch, and the outer wall of the outer punch is provided with a straight-axis groove and a cross-axis groove, which help to reduce the torque ripple of the motor and reduce the electromagnetic force of the motor; The second magnetic steel slots in the present invention are arranged in pairs of "one-shaped". This two-section one-shaped structure is different from the existing integral one-shaped structure, which can effectively reduce the generation of magnetic field leakage flux and improve The material utilization rate of permanent magnet is improved, and cost is reduced; The outer punching sheet among the present invention adopts the silicon steel material of high magnetic permeability, and the inner punching sheet adopts the high hardness aluminum type material of low magnetic permeability, wherein the outer punching sheet helps to guarantee permanent magnet The main magnetic flux of the magnetic field will not be weakened to ensure the output performance of the motor. The aluminum material used in the inner punching sheet has a low density, which greatly reduces the overall weight of the rotor, ensures the strength of the rotor, and reduces the leakage of the permanent magnet magnetic field. The magnetic flux is generated, which improves the power density of the motor; the invention can realize the inclined pole structure with different inclined pole angles through the interference fit of the rotating shaft matching key and a plurality of rotating shaft matching key grooves of different angles on the inner punching sheet, such as "one-shaped", "V-type" or "ZigZag-type" rotor with multi-segment skew.
下面结合附图及实施例对本发明作进一步描述：The present invention will be further described below in conjunction with accompanying drawing and embodiment:
图1是本发明转子冲片的结构示意图；Fig. 1 is a schematic structural view of a rotor punch of the present invention;
图2是本发明的外冲片的结构示意图；Fig. 2 is the structural representation of the outer punch of the present invention;
图3是本发明的内冲片的结构示意图；Fig. 3 is a schematic structural view of the inner punching sheet of the present invention;
图4是本发明的转轴的结构示意图；Fig. 4 is a schematic structural view of the rotating shaft of the present invention;
图5是本发明的单个转子冲片与转轴的装配示意图；Fig. 5 is a schematic diagram of the assembly of a single rotor punch and a rotating shaft of the present invention;
图6是本发明斜极结构的示意图。Fig. 6 is a schematic diagram of the oblique pole structure of the present invention.
图中标记为：1、内冲片；11、转轴安装孔；12、转轴配合键槽；13、配合键；2、外冲片；21、配合键槽；22、第一磁钢槽；23、第二磁钢槽；24、直轴凹槽；25、交轴凹槽；26、第一隔磁桥；27、第二隔磁桥；3、转轴；31、转轴配合键。The marks in the figure are: 1. Inner punch; 11. Shaft installation hole; 12. Shaft matching keyway; 13. Cooperating key; 2. Outer punching piece; 21. Cooperating keyway; 22. First magnetic steel groove; 23. No. Two magnetic steel grooves; 24, straight axis grooves; 25, cross axis grooves; 26, the first magnetic isolation bridge; 27, the second magnetic isolation bridge; 3, rotating shaft; 31, rotating shaft matching key.
为使本发明的目的、技术方案和优点更加清楚明了，下面结合具体实施方式并参照附图，对本发明进一步详细说明。应该理解，这些描述只是示例性的，而并非要限制本发明的范围。此外，在以下说明中，省略了对公知结构和技术的描述，以避免不必要地混淆本发明的概念。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.
如图1至图5所示，一种车用永磁电机转子冲片，包括内冲片1和外冲片2，内冲片1的中心处设有用于固定安装转轴3的转轴安装孔11，转轴安装孔11的侧壁处设有多个周向均匀分布的转轴配合键槽12，转轴3上设有至少一个沿着转轴3轴向延伸的转轴配合键31，转轴配合键31与转轴配合键槽12过盈配合，内冲片1的外壁处设有多个配合键13，外冲片2的内壁处设有对应的配合键槽，内冲片1和外冲片2通过配合键13和配合键槽过盈配合进行固定连接。As shown in Figures 1 to 5, a permanent magnet motor rotor stamping sheet for a vehicle includes an
外冲片2上设有一圈内层分布的第一磁钢槽22以及等量的一圈外层分布的第二磁钢槽23，第一磁钢槽22为“V型”成对分布，第二磁钢槽23为“一字型”成对分布，成对的两个第一磁钢槽22沿着外冲片2的径向方向对称分布，成对的两个第一磁钢槽22底部之间的间隙为第一隔磁桥26，第一隔磁桥26的宽度为1-2mm，成对的两个第二磁钢槽23沿着外冲片2的径向方向对称分布，成对的两个第二磁钢槽23之间的间隙为第二隔磁桥27，第二隔磁桥27的宽度为0.7-1.2mm，这种两段一字型结构区别于现有的整体式一字型结构，可以有效降低磁场漏磁通的产生，提高了永磁体的材料利用率，降低成本。此外，外冲片2在直轴方向的外壁上设有直轴凹槽24，外冲片2在交轴方向的外壁上设有交轴凹槽25，直轴凹槽24的数量等于电机极数，交轴凹槽25的数量也等于电机极数，且直轴凹槽24和交轴凹槽25交替设置，直轴凹槽24和交轴凹槽25均为圆弧形凹槽，直轴凹槽24的半径大小为第一隔磁桥26的宽度1.1-1.5倍，交轴凹槽25的半径大小为第二隔磁桥27的宽度1.1-1.5倍，直轴凹槽24和交轴凹槽25的设置有助于降低电机转矩脉动、减小电机电磁力。The
外冲片2采用高导磁率的硅钢材料，内冲片1采用低导磁率的高硬度铝型材料，其中外冲片2有助于保证永磁体磁场主磁通不会减弱，保证电机的输出性能，内冲片1采用的铝材材料密度较低，使得转子的整体重量大大减小，又保证了转子强度，也减小了永磁体磁场的漏磁通产生，提高了电机功率密度。The
如图6所示，一种车用永磁电机斜极结构，采用上述车用永磁电机转子冲片，包括转轴3以及7个通过转轴安装孔11套在转轴3上的车用永磁电机转子冲片，转轴配合键槽12的数量大于或等于转子多段斜极的分段数量，相邻两个转轴配合键槽12径向对称线之间的 夹角由转子分段斜极角度确定，转轴配合键31与内冲片1上多个不同角度的转轴配合键槽12过盈配合以实现不同斜极角度的斜极结构，如“V型”转子多段斜极，又比如“一字型”或者“ZigZag型”转子多段斜极。As shown in Figure 6, a vehicle permanent magnet motor oblique pole structure adopts the above-mentioned vehicle permanent magnet motor rotor stamping, including a rotating
应当理解的是，本发明的上述具体实施方式仅仅用于示例性说明或解释本发明的原理，而不构成对本发明的限制。因此，在不偏离本发明的精神和范围的情况下所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。此外，本发明所附权利要求旨在涵盖落入所附权利要求范围和边界、或者这种范围和边界的等同形式内的全部变化和修改例。It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and not to limit the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention shall fall within the protection scope of the present invention. Furthermore, it is intended that the appended claims of the present invention cover all changes and modifications that come within the scope and metespan of the appended claims, or equivalents of such scope and metesight.
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| DE112021007969.7T DE112021007969T5 (en) | 2021-07-13 | 2021-11-23 | PUNCHED ROTOR SHEET OF A PERMANENT MAGNET MOTOR FOR MOTOR VEHICLES |
| JP2024501123A JP2024524617A (en) | 2021-07-13 | 2021-11-23 | Permanent magnet motor rotor punching sheet and its oblique pole structure for automobiles |
| US17/710,436 US20230018426A1 (en) | 2021-07-13 | 2022-03-31 | Punching piece of permanent magnet motor rotor for vehicle and rotor skewing structure thereof |
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| CN202110800057.X | 2021-07-13 |
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| CN119051300A (en) * | 2024-08-29 | 2024-11-29 | 苏州市金澄电气技术有限公司 | Oblique pole method for TYP permanent magnet motor rotor |
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| CN113489189B (en) * | 2021-07-13 | 2025-06-10 | 合肥巨一动力系统有限公司 | Permanent magnet motor rotor punching sheet for vehicle and inclined pole structure thereof |
| CN114362397B (en) * | 2022-02-21 | 2022-11-18 | 小米汽车科技有限公司 | Punching sheet structure, rotor assembly and motor |
| CN117639327B (en) * | 2022-08-12 | 2025-05-13 | 比亚迪股份有限公司 | Rotor, motor and vehicle |
| CN116073543B (en) * | 2023-03-20 | 2023-06-23 | 南京蒲塘电器有限公司 | Servo motor and manufacturing process of stator assembly of servo motor |
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