WO2019037479A1 - Rotor, electric motor and compressor - Google Patents

Rotor, electric motor and compressor Download PDF

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Publication number
WO2019037479A1
WO2019037479A1 PCT/CN2018/087062 CN2018087062W WO2019037479A1 WO 2019037479 A1 WO2019037479 A1 WO 2019037479A1 CN 2018087062 W CN2018087062 W CN 2018087062W WO 2019037479 A1 WO2019037479 A1 WO 2019037479A1
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WO
WIPO (PCT)
Prior art keywords
magnetic
rotor
permanent magnet
line
punch
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PCT/CN2018/087062
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French (fr)
Chinese (zh)
Inventor
乔正忠
邱小华
徐飞
虞阳波
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广东美芝制冷设备有限公司
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Application filed by 广东美芝制冷设备有限公司 filed Critical 广东美芝制冷设备有限公司
Publication of WO2019037479A1 publication Critical patent/WO2019037479A1/en

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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]
    • H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
    • H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • the present invention relates to the field of compressor technology, and in particular to a rotor, a motor and a compressor.
  • the noise generated during their operation is the key to improving the user experience.
  • the main causes of noise are mechanical noise, aerodynamic noise, and electromagnetic noise.
  • electromagnetic noise is excited by electromagnetic harmonics generated by the drive motor of the compressor during operation.
  • the electromagnetic noise is often reduced by setting the permanent magnet motor rotor to a diagonal pole/stagger pole or a fault pole structure, but due to the oblique pole/staggered pole or the wrong pole structure of the permanent magnet slot of the permanent magnet
  • the manufacturing process is relatively high, so the yield is relatively low; in addition, there is a diagonal pole/stagger pole structure by setting the outer circumference of the rotor, but the permanent magnet slot of the permanent magnet is well-positioned.
  • This structure is easy to manufacture and can be reduced.
  • the present invention provides a rotor, a motor and a compressor, which can achieve low electromagnetic noise reduction and low process difficulty.
  • the present invention provides a rotor including a rotor core and a plurality of permanent magnets, the rotor cores being provided with a plurality of permanent magnet slots axially penetrating and uniformly distributed in the circumferential direction, a plurality of said a permanent magnet slot for inserting a plurality of the permanent magnets in a one-to-one correspondence, wherein the rotor core portions radially outward of each of the permanent magnet slots are respectively provided with a plurality of first magnetic isolation holes; wherein
  • the rotor core includes a plurality of punch stacks stacked in the axial direction, and projections of respective ones of the first plurality of the first magnetic isolation holes of the adjacent two of the punch stacks on the same axis perpendicular plane are at least partially not coincide.
  • the number of the first magnetic isolation holes of any two adjacent ones of the punch stack is the same and the circumferential position is shifted.
  • the first magnetic separation holes on each of the punch stacks which are sequentially laminated in the axial direction are sequentially displaced in the same circumferential direction.
  • the punch stack includes a plurality of first magnetic isolation holes arranged one-to-one correspondingly radially outward of each of the permanent magnet slots and circumferentially spaced, each of the first magnetic isolation holes
  • the group includes a plurality of the first magnetic isolation holes, and a magnetic flux path between the plurality of the first magnetic separation holes has a midpoint of a magnetic circuit, and a radial connection between a midpoint of the magnetic circuit and a center of the rotor constitutes a a magnetic path direction line of the first magnetic flux barrier group; wherein, in any two adjacent ones of the punch stacks, the respective magnetic paths of the corresponding first magnetic flux barrier groups are stacked in a circumferential direction Staggered.
  • the rotor core comprises at least an upper punch stack and a lower punch stack laminated in the axial direction, wherein any one of the permanent magnet slots is provided with an upper first magnetic isolation hole group and a first magnetic isolation hole group, wherein an upper magnetic path direction line of the upper first magnetic separation hole group and a lower magnetic path direction line of the lower first magnetic separation hole group are located in a radial direction of the permanent magnet groove The circumferential sides of the line;
  • the circumferential angle between the upper magnetic path line and the radial mid-perpend is ⁇ 1
  • the lower magnetic path line and the radial mid-vertical line have an angle ⁇ 2
  • the magnetic circuit center misalignment angle between the upper punch stack and the lower punch laminate is ⁇ 1 + ⁇ 2.
  • the rotor core comprises an upper punch stack and a lower punch stack laminated in the axial direction, wherein a radial outer side of any of the permanent magnet slots is provided with an upper first magnetic isolation hole group and a lower portion a first magnetic flux barrier group, an upper magnetic path direction line of the upper first magnetic isolation aperture group and a lower magnetic path alignment line of the lower first magnetic separation aperture group are located in a radial perpendicular line of the permanent magnet slot The same side of the circumference;
  • the circumferential angle between the upper magnetic path line and the radial mid-perpend is ⁇ 1
  • the lower magnetic path line and the radial mid-vertical line have an angle ⁇ 2
  • the magnetic circuit center misalignment angle between the upper punch stack and the lower punch laminate is
  • the first magnetic isolation hole is a radially extending slit structure.
  • a plurality of the permanent magnet slots on each of the punch stacks are axially aligned one by one.
  • both end edges of each of the permanent magnet slots are connected with a second magnetic flux leakage hole extending radially outward.
  • each of the punch stacks comprises a plurality of axially laminated silicon steel sheets, and the thickness D1 of the silicon steel sheets and the average width D2 of the first magnetic isolation holes satisfy: D1 ⁇ D2.
  • the present invention provides a motor including the above rotor.
  • the present invention provides a compressor including the above motor.
  • the present invention provides a plurality of first magnetic isolation holes in the rotor for guiding the magnetic circuit generated by the permanent magnets in each of the punch stacks, and the permanent magnet slots need not be arranged as chutes.
  • the magnetic circuit of the rotor can be inclined/polarized in the axial direction, the vibration of the motor is greatly weakened, and the electromagnetic noise is reduced, and the rotor structure is easy to manufacture and the yield is high.
  • FIG. 1a is a schematic structural view of a rotor according to an embodiment of the present invention.
  • Figure 1b is an axial cross-sectional view of the rotor according to Figure 1a;
  • FIG. 2a is a schematic structural view of a rotor according to Embodiment 1 of the present invention.
  • Figure 2b is a schematic structural view of the upper punch stack of Figure 2a;
  • Figure 2c is a schematic view showing the structure of the lower punching lamination of Figure 2a;
  • Figure 2d is a schematic view of the misalignment angle of the magnetic circuit center in Figure 2a;
  • Figure 3a is a schematic structural view of a rotor according to Embodiment 2 of the present invention.
  • Figure 3b is a schematic structural view of the upper punch stack of Figure 3a;
  • Figure 3c is a schematic structural view of the intermediate punch stack of Figure 3a;
  • Figure 3d is a schematic structural view of the lower punch laminate of Figure 3a;
  • FIG. 4a is a schematic structural view of an upper punch stack according to Embodiment 3 of the present invention.
  • FIG. 4b is a schematic structural view of a lower punch laminate according to Embodiment 3 of the present invention.
  • Figure 5 is an axial cross-sectional view of a motor in accordance with an embodiment of the present invention.
  • Figure 6a is a waveform diagram of a line back electromotive force of the motor according to Figure 5;
  • Figure 6b is a cogging torque waveform diagram of the motor according to Figure 5;
  • Figure 6c is a waveform diagram of load torque of the motor according to Figure 5;
  • Figure 7 is an axial cross-sectional view of a compressor in accordance with an embodiment of the present invention.
  • 1001 rotor; 1002: stator;
  • 11 a laminate laminate; 111: an upper laminate; 112: a lower laminate;
  • first magnetic isolation hole 121: upper first magnetic isolation hole group; 122: lower first magnetic separation hole group;
  • orientation words such as “up, down, top, and bottom” are generally used for the directions shown in the drawings or for vertical, vertical or gravity directions, unless otherwise stated.
  • the components are described in terms of their positional relationship.
  • the present invention provides a rotor comprising a rotor core 1, a plurality of permanent magnets 2, a weight 3 and an end plate 4, the rotor core 1 being axially penetrated and evenly distributed in the circumferential direction a plurality of permanent magnet slots 15 for inserting a plurality of permanent magnets 2 in one-to-one correspondence, and a plurality of first spacers are respectively disposed on the radially outer rotor core portions of the respective permanent magnet slots 15 a magnetic hole 12; wherein the rotor core 1 comprises a plurality of punch stacks 11 laminated in the axial direction, and the respective plurality of first magnetic isolation holes 12 of any two adjacent punch stacks 11 are perpendicular to the same axis The projections on the top do not at least partially overlap.
  • each of the punch stacks 11 included in the rotor core 1 is provided with a plurality of permanent magnet slots 15 uniformly distributed in the circumferential direction, and the axial length of each of the permanent magnet slots 15 is equal to the permanent magnets.
  • the slot 15 is located in the axial thickness of the punch stack 11, and a permanent magnet 2 is inserted into each of the permanent magnet slots 15.
  • a plurality of first magnetic isolation holes 12 are disposed between each of the permanent magnet slots 15 and the radially outermost edge of the punch stack 11, and likewise, the axial length of each of the first magnetic isolation holes 12 is equal to the first The axial thickness of the punch stack 11 in which the magnetic isolation holes 12 are located, i.e., all of the permanent magnet slots 15 and all of the first magnetic isolation apertures 12 extend axially through the stack 11 of sheets in which they are placed.
  • all the first magnetic separation holes 12 on the two sub-stacks 11 are perpendicular in the same axial direction. At least a portion of the projections on the surface are not coincident; or, when the number of the first magnetic isolation holes 12 on any two adjacent laminate laminations 11 is equal, but the corresponding first magnetic isolation holes 12 are in the mutual.
  • the projections of all the first magnetic isolation holes 12 on the two axial laminations 11 on the same axial vertical plane are also at least partially non-coincident.
  • the first magnetic isolation hole 12 provided in the rotor 1001 can guide the direction of the magnetic circuit generated by the permanent magnet 2 in each of the punch stacks 11, and in the case where the permanent magnet slots 15 do not need to be provided as chutes,
  • the rotor magnetic circuit produces a ramp/displacement effect in the axial direction.
  • the radial force wave in the air gap harmonic between the stator and the rotor is phase-shifted in the axial direction of the rotor core 1, and the amount of radial electromagnetic force received by the rotor 1001 in the axial direction is reduced, and the vibration thereof is vibrated.
  • the amplitude is also reduced, achieving a low reduction in electromagnetic noise.
  • the number of the first magnetic isolation holes 12 of any two adjacent punch laminations 11 is the same and the circumferential position is shifted.
  • the first magnetic isolation holes 12 on the respective lamination stacks 11 of the rotor 1001 which are sequentially laminated in the axial direction are sequentially displaced in the same circumferential direction.
  • the first magnetic isolation hole 12 on the second punch stack of the rotor 1001 is offset clockwise by a certain angle with respect to the corresponding first magnetic isolation hole 12 of the first punch stack.
  • the first magnetic isolation hole 12 on the third punch laminate is also offset by a certain angle in the clockwise direction with respect to the corresponding first magnetic isolation hole 12 on the second punch laminate, and so on.
  • the punch stack 11 includes a plurality of first magnetic isolation holes arranged one-to-one correspondingly radially outward of the respective permanent magnet slots 15 and circumferentially spaced, each first magnetic isolation
  • the hole group includes a plurality of first magnetic isolation holes 12, and a magnetic flux path between the plurality of first magnetic separation holes 12 has a magnetic circuit midpoint 21, and a radial connection between the magnetic circuit midpoint 21 and the rotor center constitutes a first
  • the magnetic path of the magnetic isolation group is directed to the line 13; wherein, on any two adjacent chip laminations 11, the respective magnetic paths of the corresponding first magnetic permeation groups are staggered in the circumferential direction toward the line 13.
  • the magnetic flux generated by the permanent magnet 2 is guided by the first magnetic shielding group on the punch stack 11 to form a magnetic circuit distributed in a regular manner, and each of the first magnetic blocking groups
  • the magnetic circuit midpoint 21 is located on a straight line that symmetrically distributes the plurality of first magnetic isolation holes 12, and the straight line and the above-described magnetic path alignment line 13 coincide with each other.
  • the respective magnetic path direction lines 13 of the plurality of first magnetic flux barrier groups corresponding to the stack are circumferentially offset from the radial center line 16 of the permanent magnet grooves 15 corresponding to the radially inner side.
  • the radial mid-perpendicular line 16 of the permanent magnet groove 15 is a straight line formed by the midpoint of the permanent magnet groove 15 in the longitudinal direction and the center of the rotor.
  • the rotor 1001 described above is further described below by way of an embodiment:
  • the rotor core 1001 of the present embodiment includes an upper punching lamination 111 and a lower punching lamination 112 which are axially laminated, wherein any of the permanent magnet slots 15 is provided on the radially outer side.
  • the upper magnetic isolation hole group 121 and the lower first magnetic separation hole group 122, the upper magnetic path of the upper first magnetic isolation hole group 121 and the lower magnetic path of the lower first magnetic separation hole group 122 are located at the line 132
  • the circumferential angle of the perpendicular 16 is ⁇ 2
  • the magnetic center misalignment angle between the upper punch stack 111 and the lower punch stack 112 is ⁇ 1 + ⁇ 2.
  • the upper magnetic path is The line 131 is on the circumferential left side of the vertical line 16 in the radial direction and the lower magnetic path direction line 132 is on the right side of the circumference of the perpendicular line 16 in the radial direction, at which time the first first magnetic isolation hole group 121 and the lower first magnetic separation group
  • the hole groups 122 are staggered from each other in the circumferential direction. Therefore, the rotor magnetic circuit can produce a ramp/displacement effect in the axial direction, thereby reducing electromagnetic noise.
  • the rotor of the first embodiment can also be provided such that the rotor core 1001 includes an upper punching lamination 111 and a lower punching lamination 112 which are axially laminated, and a radial outer side of any of the permanent magnet slots 15 is provided.
  • the rotor core 1001 includes an upper punching lamination 111 and a lower punching lamination 112 which are axially laminated, and a radial outer side of any of the permanent magnet slots 15 is provided.
  • the upper magnetic path is Both the line 131 and the lower magnetic path line 132 are on the same side in the circumferential direction of the vertical line 16 in the radial direction, but since the above ⁇ 1 and ⁇ 2 are different, the upper first magnetic isolation hole group 121 and the lower first magnetic separation hole group 122 are the same in the circumferential direction. They will also be staggered from each other. Therefore, the rotor magnetic circuit can also produce a ramp/displacement effect in the axial direction, thereby reducing electromagnetic noise.
  • the positional relationship between the magnetic path line 13 and the radial mid-perpendicular line 16 in the present invention is not limited to the case described in the embodiment, and the magnetic path-to-line 13 and the radial mid-perpendicular line 16 are coincident. It is only necessary to ensure that the projections of the respective plurality of first magnetic isolation holes 12 of any two adjacent punch stacks 11 on the same axis perpendicular plane are at least partially non-coincident, and the rotor oblique/polar pole effect can also be achieved.
  • each of the punch stacks 11 includes a plurality of axially laminated silicon steel sheets, and the thickness D1 of the silicon steel sheets and the average width D2 of the first magnetic isolation holes satisfy: D1 ⁇ D2. It should be noted that the plurality of silicon steel sheets constituting the same punch stack 11 should be identical, and there is no structure in which the first magnetic shield group corresponding to the stack is circumferentially shifted.
  • the plurality of permanent magnet slots 15 on each of the punch stacks 11 are aligned one by one in the axial direction, and there is no chute structure, which can greatly reduce the manufacturing process requirements of the rotor and ensure the yield.
  • all of the first magnetic isolation holes 12 mentioned in this embodiment should be provided as a slit structure extending in the radial direction.
  • the rotor 1001 of the present embodiment includes an upper punch lamination, a middle punch lamination and a lower punch lamination laminated in the axial direction, and the radial outer side of any of the permanent magnet slots 15
  • the first magnetic isolation holes 12 are respectively disposed; the projections of the radial vertical lines 16 of the permanent magnet slots 15 corresponding to the upper punch laminate, the intermediate laminate laminate and the lower punch laminate stack are coincident with each other in the axial direction.
  • the magnetic path of the adjacent two chip stacks 11 is shifted to the line 13 by a certain angle in the circumferential direction.
  • the rotor 1001 has a plurality of punch stacks 11, it is ensured that the projections of the radial vertical lines 16 of the corresponding permanent magnet slots 15 in the axial direction coincide with each other, adjacent to each other.
  • the magnetic path of the two punch stacks 11 is shifted by a certain angle in the circumferential direction of the line 13, so that the rotor magnetic circuit can have a structure of oblique pole/wrong pole non-oblique grooves in the axial direction, and the electromagnetic noise is reduced.
  • the rotor 1001 of the present embodiment includes an upper punch stack and a lower punch stack laminated in the axial direction, wherein any of the permanent magnet slots 15 is provided with a first partition on the radially outer side.
  • the magnetic hole 12 when the projections of the radial vertical lines 16 of the permanent magnet grooves 15 corresponding to the upper punch stack and the lower punch stack are coincident with each other, the magnetic paths of the two punch stacks 11
  • the line 13 is offset in the circumferential direction by a certain angle; furthermore, at both end edges of the respective permanent magnet slots 15, a second magnetically permeable hole 14 extending radially outward is connected.
  • the rotor magnetic circuit can be further guided to form a ramp/dislocation pole, and the average radial force generated by the radial force wave in the air gap harmonic in the axial direction of the rotor is reduced, and the rotor is reduced.
  • the amplitude of the vibration is reduced.
  • the present invention also provides an electric machine 100.
  • the electric machine 100 includes a stator 1002, a coil winding, and a rotor 1001 employing the embodiment 1, the rotor 1001 further including a permanent magnet 2.
  • the above motor 100 was tested as follows, and a motor to which another rotor was applied was taken as a comparative example.
  • the only difference between the motor of the comparative example and the motor 100 of the present embodiment is that the first magnetic perforation stack corresponding to the lamination stack of the motor rotor of the comparative example is not circumferentially staggered. . Further, it is assumed that the magnetic circuit center misalignment angle of the motor rotor of the present embodiment is 10°.
  • the cogging torque waveform of the motor 100 in this embodiment has a small amplitude and cogging torque.
  • the number of times increases correspondingly, effectively reducing the amplitude of the oscillation of the motor 100, thereby reducing the noise of the motor.
  • the present invention also provides a compressor including the motor 100 of the fourth embodiment.

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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

A rotor, an electric motor, and a compressor. The rotor comprises a rotor core (1) and a plurality of permanent magnets (2). The rotor core (1) is provided with a plurality of permanent magnet slots (15) that are penetrated through axially and evenly distributed in a circumferential direction, and the plurality of the permanent magnet slots (15) is used for inserting the plurality of permanent magnets (2) in one-to-one correspondence fashion; parts of the rotor core positioned on radial outsides of all the permanent magnet slots (15) are respectively provided with a plurality of first magnetic isolation holes (12), wherein the rotor core (1) comprises a plurality of axially stacked punching laminates (11), and projections of the plurality of first magnetic isolation holes (12) of each of any two adjacent punching laminates (11) on the same axial vertical plane at least do not partially coincide. According to the rotor, a plurality of first magnetic isolation holes (12) is arranged to guide magnetic paths generated by permanent magnets (2) in all the punching laminates. In the case that the permanent magnet slots (15) do not need to be arranged as inclined slots, a rotor magnet path is enabled to have slant/wrong polar effect in an axial direction, vibration can be decreased, and noise reduction can be achieved.

Description

转子、电机和压缩机Rotor, motor and compressor 技术领域Technical field
本发明涉及压缩机技术领域，具体地，涉及一种转子、电机和压缩机。The present invention relates to the field of compressor technology, and in particular to a rotor, a motor and a compressor.
背景技术Background technique
对于空调***而言，减控其运行过程中产生的噪声是提高用户体验的关键。在空调运行过程中，产生噪声的原因主要有机械噪声、空气动力噪声以及电磁噪声等，其中，电磁噪声是由压缩机的驱动电机在运行过程中产生的电磁谐波所激励的。在现有技术中，常通过将永磁电机转子设置为斜极/错极或错极结构来实现电磁噪声的低减，但由于永磁体的永磁体槽的斜极/错极或错极结构的制造工艺要求较高，因此成品率较为低下；此外，还有通过设置转子外周错位、但永磁体的永磁体槽不错位的斜极/错极结构，这种结构虽然易于制造且能实现减低噪声的效果，但在压缩机和电机的高压力、高转速的工况下，该转子外周的凹凸结构会使风阻损耗增大，导致电机和压缩机的性能降低。For air conditioning systems, reducing the noise generated during their operation is the key to improving the user experience. During the operation of air conditioners, the main causes of noise are mechanical noise, aerodynamic noise, and electromagnetic noise. Among them, electromagnetic noise is excited by electromagnetic harmonics generated by the drive motor of the compressor during operation. In the prior art, the electromagnetic noise is often reduced by setting the permanent magnet motor rotor to a diagonal pole/stagger pole or a fault pole structure, but due to the oblique pole/staggered pole or the wrong pole structure of the permanent magnet slot of the permanent magnet The manufacturing process is relatively high, so the yield is relatively low; in addition, there is a diagonal pole/stagger pole structure by setting the outer circumference of the rotor, but the permanent magnet slot of the permanent magnet is well-positioned. This structure is easy to manufacture and can be reduced. The effect of noise, but under the high pressure and high speed conditions of the compressor and the motor, the uneven structure of the outer circumference of the rotor will increase the windage loss, resulting in a decrease in the performance of the motor and the compressor.
因此，在设计转子斜极/错极或错极结构实现电磁噪声低减的同时，还必须考虑工艺难度、以及是否会产生一些降低空调工作性能的情况等。Therefore, while designing the rotor's oblique pole/staggered pole or wrong pole structure to achieve low electromagnetic noise reduction, it is also necessary to consider the process difficulty and whether it will produce some conditions to reduce the air conditioning performance.
发明内容Summary of the invention
针对现有技术的上述缺陷或不足，本发明提供了一种转子、电机和压缩机，能实现电磁噪声的低减，且工艺难度较低。In view of the above-mentioned defects or deficiencies of the prior art, the present invention provides a rotor, a motor and a compressor, which can achieve low electromagnetic noise reduction and low process difficulty.
为实现上述目的，本发明提供了一种转子，包括转子铁芯和多个永磁体，所述转子铁芯设有轴向贯通且沿周向均匀分布的多个永磁体槽，多个所述永磁体槽用于一一对应地插放多个所述永磁体，各个所述永磁体槽的径向外侧的所述转子铁芯部分分别设置有多个第一隔磁孔；其中，所述转子铁芯包括沿轴向叠压的多个冲片叠层，任意相邻两个所述冲片叠层的各自多个所述第一隔磁孔在同一轴垂直面上的投影至少部分不重合。In order to achieve the above object, the present invention provides a rotor including a rotor core and a plurality of permanent magnets, the rotor cores being provided with a plurality of permanent magnet slots axially penetrating and uniformly distributed in the circumferential direction, a plurality of said a permanent magnet slot for inserting a plurality of the permanent magnets in a one-to-one correspondence, wherein the rotor core portions radially outward of each of the permanent magnet slots are respectively provided with a plurality of first magnetic isolation holes; wherein The rotor core includes a plurality of punch stacks stacked in the axial direction, and projections of respective ones of the first plurality of the first magnetic isolation holes of the adjacent two of the punch stacks on the same axis perpendicular plane are at least partially not coincide.
优选地，任意相邻两个所述冲片叠层的所述第一隔磁孔个数相同且周向位置错开。Preferably, the number of the first magnetic isolation holes of any two adjacent ones of the punch stack is the same and the circumferential position is shifted.
优选地，沿轴向依次叠压的各个所述冲片叠层上的所述第一隔磁孔沿同一周向依次错位布置。Preferably, the first magnetic separation holes on each of the punch stacks which are sequentially laminated in the axial direction are sequentially displaced in the same circumferential direction.
优选地，所述冲片叠层包括一一对应地设置在各个所述永磁体槽的径向外侧且沿周向间隔的多个第一隔磁孔组，每个所述第一隔磁孔组包括沿多个所述第一隔磁孔，多 个所述第一隔磁孔之间的磁通通路具有磁路中点，所述磁路中点与转子中心的径向连线构成所述第一隔磁孔组的磁路径向线；其中，任意相邻两个所述冲片叠层上，层叠对应的所述第一隔磁孔组的各自所述磁路径向线沿周向错开。Preferably, the punch stack includes a plurality of first magnetic isolation holes arranged one-to-one correspondingly radially outward of each of the permanent magnet slots and circumferentially spaced, each of the first magnetic isolation holes The group includes a plurality of the first magnetic isolation holes, and a magnetic flux path between the plurality of the first magnetic separation holes has a midpoint of a magnetic circuit, and a radial connection between a midpoint of the magnetic circuit and a center of the rotor constitutes a a magnetic path direction line of the first magnetic flux barrier group; wherein, in any two adjacent ones of the punch stacks, the respective magnetic paths of the corresponding first magnetic flux barrier groups are stacked in a circumferential direction Staggered.
优选地，所述转子铁芯至少包括沿轴向叠压的上冲片叠层和下冲片叠层，其中任一所述永磁体槽的径向外侧设有上第一隔磁孔组和下第一隔磁孔组，所述上第一隔磁孔组的上磁路径向线和所述下第一隔磁孔组的下磁路径向线位于所述永磁体槽的径向中垂线的周向两侧；Preferably, the rotor core comprises at least an upper punch stack and a lower punch stack laminated in the axial direction, wherein any one of the permanent magnet slots is provided with an upper first magnetic isolation hole group and a first magnetic isolation hole group, wherein an upper magnetic path direction line of the upper first magnetic separation hole group and a lower magnetic path direction line of the lower first magnetic separation hole group are located in a radial direction of the permanent magnet groove The circumferential sides of the line;
其中，所述上磁路径向线与所述径向中垂线的周向夹角为α1，所述下磁路径向线与所述径向中垂线的周向夹角为α2，所述上冲片叠层与所述下冲片叠层之间的磁路中心错位角度为α1+α2。Wherein the circumferential angle between the upper magnetic path line and the radial mid-perpend is α1, and the lower magnetic path line and the radial mid-vertical line have an angle α2, The magnetic circuit center misalignment angle between the upper punch stack and the lower punch laminate is α1 + α2.
优选地，所述转子铁芯包括沿轴向叠压的上冲片叠层和下冲片叠层，其中任一所述永磁体槽的径向外侧设有上第一隔磁孔组和下第一隔磁孔组，所述上第一隔磁孔组的上磁路径向线和所述下第一隔磁孔组的下磁路径向线位于所述永磁体槽的径向中垂线的周向同侧；Preferably, the rotor core comprises an upper punch stack and a lower punch stack laminated in the axial direction, wherein a radial outer side of any of the permanent magnet slots is provided with an upper first magnetic isolation hole group and a lower portion a first magnetic flux barrier group, an upper magnetic path direction line of the upper first magnetic isolation aperture group and a lower magnetic path alignment line of the lower first magnetic separation aperture group are located in a radial perpendicular line of the permanent magnet slot The same side of the circumference;
其中，所述上磁路径向线与所述径向中垂线的周向夹角为α1，所述下磁路径向线与所述径向中垂线的周向夹角为α2，所述上冲片叠层与所述下冲片叠层之间的磁路中心错位角度为|α1-α2|。Wherein the circumferential angle between the upper magnetic path line and the radial mid-perpend is α1, and the lower magnetic path line and the radial mid-vertical line have an angle α2, The magnetic circuit center misalignment angle between the upper punch stack and the lower punch laminate is |α1-α2|.
优选地，所述第一隔磁孔为径向延伸的狭缝结构。Preferably, the first magnetic isolation hole is a radially extending slit structure.
优选地，各个所述冲片叠层上的多个所述永磁体槽轴向一一对齐。Preferably, a plurality of the permanent magnet slots on each of the punch stacks are axially aligned one by one.
优选地，各个所述永磁体槽的两端边缘均连通有径向向外延伸的第二隔磁孔。Preferably, both end edges of each of the permanent magnet slots are connected with a second magnetic flux leakage hole extending radially outward.
优选地，每个所述冲片叠层包括轴向叠压的多块硅钢片，所述硅钢片的厚度D1与所述第一隔磁孔的平均宽度D2满足：D1＜D2。Preferably, each of the punch stacks comprises a plurality of axially laminated silicon steel sheets, and the thickness D1 of the silicon steel sheets and the average width D2 of the first magnetic isolation holes satisfy: D1 < D2.
另外，本发明还提供了一种包括上述转子的电机。Further, the present invention provides a motor including the above rotor.
另外，本发明还提供了一种包括上述电机的压缩机。Further, the present invention provides a compressor including the above motor.
通过上述技术方案，本发明在转子中设置了多个第一隔磁孔，用于引导永磁体产生的磁路在各冲片叠层中的走向，在永磁体槽不需要设置成斜槽的情况下，就能使转子磁路在轴向上产生斜极/错极效果，大大减弱了电机的振动，实现电磁噪声的低减，同时该转子结构易于制造，成品率较高。According to the above technical solution, the present invention provides a plurality of first magnetic isolation holes in the rotor for guiding the magnetic circuit generated by the permanent magnets in each of the punch stacks, and the permanent magnet slots need not be arranged as chutes. In this case, the magnetic circuit of the rotor can be inclined/polarized in the axial direction, the vibration of the motor is greatly weakened, and the electromagnetic noise is reduced, and the rotor structure is easy to manufacture and the yield is high.
本发明的其它特征和优点将在随后的具体实施方式部分予以详细说明。Other features and advantages of the invention will be described in detail in the detailed description which follows.
附图说明DRAWINGS
图1a为根据本发明具体实施例的转子的结构示意图；1a is a schematic structural view of a rotor according to an embodiment of the present invention;
图1b为根据图1a的转子的轴向剖视图；Figure 1b is an axial cross-sectional view of the rotor according to Figure 1a;
图2a为根据本发明实施例1的转子的结构示意图；2a is a schematic structural view of a rotor according to Embodiment 1 of the present invention;
图2b为图2a中的上冲片叠层的结构示意图；Figure 2b is a schematic structural view of the upper punch stack of Figure 2a;
图2c为图2a中的下冲片叠层的结构示意图；Figure 2c is a schematic view showing the structure of the lower punching lamination of Figure 2a;
图2d为图2a中的磁路中心错位角度的示意图；Figure 2d is a schematic view of the misalignment angle of the magnetic circuit center in Figure 2a;
图3a为根据本发明实施例2的转子的结构示意图；Figure 3a is a schematic structural view of a rotor according to Embodiment 2 of the present invention;
图3b为图3a中的上冲片叠层的结构示意图；Figure 3b is a schematic structural view of the upper punch stack of Figure 3a;
图3c为图3a中的中冲片叠层的结构示意图；Figure 3c is a schematic structural view of the intermediate punch stack of Figure 3a;
图3d为图3a中的下冲片叠层的结构示意图；Figure 3d is a schematic structural view of the lower punch laminate of Figure 3a;
图4a为根据本发明实施例3的上冲片叠层的结构示意图；4a is a schematic structural view of an upper punch stack according to Embodiment 3 of the present invention;
图4b为根据本发明实施例3的下冲片叠层的结构示意图4b is a schematic structural view of a lower punch laminate according to Embodiment 3 of the present invention.
图5为根据本发明具体实施例的电机的轴向剖视图；Figure 5 is an axial cross-sectional view of a motor in accordance with an embodiment of the present invention;
图6a为根据图5的电机的线反电势波形图；Figure 6a is a waveform diagram of a line back electromotive force of the motor according to Figure 5;
图6b为根据图5的电机的齿槽转矩波形图；Figure 6b is a cogging torque waveform diagram of the motor according to Figure 5;
图6c为根据图5的电机的负载转矩波形图；Figure 6c is a waveform diagram of load torque of the motor according to Figure 5;
图7为根据本发明具体实施例的压缩机的轴向剖视图。Figure 7 is an axial cross-sectional view of a compressor in accordance with an embodiment of the present invention.
附图标记：Reference mark:
100：电机；100: motor;
1001：转子；1002：定子；1001: rotor; 1002: stator;
1：转子铁芯；2：永磁体；3：平衡块；4：端板；1: rotor core; 2: permanent magnet; 3: balance block; 4: end plate;
11：冲片叠层；111：上冲片叠层；112：下冲片叠层；11: a laminate laminate; 111: an upper laminate; 112: a lower laminate;
12：第一隔磁孔；121：上第一隔磁孔组；122：下第一隔磁孔组；12: first magnetic isolation hole; 121: upper first magnetic isolation hole group; 122: lower first magnetic separation hole group;
13：磁路径向线；131：上磁路径向线；132：下磁路径向线；13: magnetic path to line; 131: upper magnetic path to line; 132: lower magnetic path to line;
14：第二隔磁孔；14: a second magnetic isolation hole;
15：永磁体槽；15: permanent magnet slot;
16：径向中垂线；16: radial mid-perpendicular;
21：磁路中点；21: the midpoint of the magnetic circuit;
α1：上磁路径向线与径向中垂线的周向夹角；11: the circumferential angle between the upper magnetic path and the vertical line in the radial direction;
α2：下磁路径向线与径向中垂线的周向夹角。22: the circumferential angle between the lower magnetic path and the vertical line in the radial direction.
具体实施方式Detailed ways
以下结合附图对本发明的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本发明，并不用于限制本发明。The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative and not restrictive.
需要说明的是，在不冲突的情况下，本发明中的实施例及实施例中的特征可以相互组合。It should be noted that the embodiments in the present invention and the features in the embodiments may be combined with each other without conflict.
在本发明中，在未作相反说明的情况下，使用的方位词如“上、下、顶、底”通常是针对附图所示的方向而言的或者是针对竖直、垂直或重力方向上而言的各部件相互位置关系描述用词。In the present invention, the orientation words such as "up, down, top, and bottom" are generally used for the directions shown in the drawings or for vertical, vertical or gravity directions, unless otherwise stated. In the above, the components are described in terms of their positional relationship.
下面将参考附图并结合实施例来详细说明本发明。The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.
参照图1a至图1b，本发明提供了一种转子，包括转子铁芯1、多个永磁体2、平衡块3和端板4，转子铁芯1设有轴向贯通且沿周向均匀分布的多个永磁体槽15，多个永磁体槽15用于一一对应地插放多个永磁体2，各个永磁体槽15的径向外侧的转子铁芯部分分别设置有多个第一隔磁孔12；其中，转子铁芯1包括沿轴向叠压的多个冲片叠层11，任意相邻两个冲片叠层11的各自多个第一隔磁孔12在同一轴垂直面上的投影至少部分不重合。Referring to Figures 1a to 1b, the present invention provides a rotor comprising a rotor core 1, a plurality of permanent magnets 2, a weight 3 and an end plate 4, the rotor core 1 being axially penetrated and evenly distributed in the circumferential direction a plurality of permanent magnet slots 15 for inserting a plurality of permanent magnets 2 in one-to-one correspondence, and a plurality of first spacers are respectively disposed on the radially outer rotor core portions of the respective permanent magnet slots 15 a magnetic hole 12; wherein the rotor core 1 comprises a plurality of punch stacks 11 laminated in the axial direction, and the respective plurality of first magnetic isolation holes 12 of any two adjacent punch stacks 11 are perpendicular to the same axis The projections on the top do not at least partially overlap.
也就是说，上述转子铁芯1包括的每个冲片叠层11中均设有沿周向均匀分布的多个永磁体槽15，且每个永磁体槽15的轴向长度等于该永磁体槽15所在冲片叠层11的轴向厚度，每个永磁体槽15中均插放有一个永磁体2。在每个永磁体槽15与冲片叠层11的径向最外侧边缘之间设有多个第一隔磁孔12，同样地，每个第一隔磁孔12的轴向长度等于该第一隔磁孔12所在冲片叠层11的轴向厚度，即所有永磁体槽15和所有第一隔磁孔12均轴向贯穿其所在的冲片叠层11。That is, each of the punch stacks 11 included in the rotor core 1 is provided with a plurality of permanent magnet slots 15 uniformly distributed in the circumferential direction, and the axial length of each of the permanent magnet slots 15 is equal to the permanent magnets. The slot 15 is located in the axial thickness of the punch stack 11, and a permanent magnet 2 is inserted into each of the permanent magnet slots 15. A plurality of first magnetic isolation holes 12 are disposed between each of the permanent magnet slots 15 and the radially outermost edge of the punch stack 11, and likewise, the axial length of each of the first magnetic isolation holes 12 is equal to the first The axial thickness of the punch stack 11 in which the magnetic isolation holes 12 are located, i.e., all of the permanent magnet slots 15 and all of the first magnetic isolation apertures 12 extend axially through the stack 11 of sheets in which they are placed.
另外，当任意相邻的两个冲片叠层11上的第一隔磁孔12个数不相等时，该两个冲片叠层11上的所有第一隔磁孔12在同一轴向垂直面上的投影至少有一部分是不重合的；或者，当任意相邻的两个冲片叠层11上的第一隔磁孔12个数相等，但层叠对应的第一隔磁孔12相互在周向上有一定的错位时，该两个冲片叠层11上的所有第一隔磁孔12在同一轴向垂直面上的投影也是至少有一部分是不重合的。In addition, when the number of the first magnetic isolation holes 12 on any two adjacent punch laminations 11 is unequal, all the first magnetic separation holes 12 on the two sub-stacks 11 are perpendicular in the same axial direction. At least a portion of the projections on the surface are not coincident; or, when the number of the first magnetic isolation holes 12 on any two adjacent laminate laminations 11 is equal, but the corresponding first magnetic isolation holes 12 are in the mutual When there is a certain misalignment in the circumferential direction, the projections of all the first magnetic isolation holes 12 on the two axial laminations 11 on the same axial vertical plane are also at least partially non-coincident.
上述转子1001中设置的第一隔磁孔12，能引导永磁体2产生的磁路在各冲片叠层11中的走向，在永磁体槽15不需要设置成斜槽的情况下，就能使转子磁路在轴向上产 生斜极/错极效果。此时，定子与转子间的气隙谐波中的径向力波在转子铁芯1的轴向上发生相位移，转子1001在轴向上受到的径向电磁力叠加量减小，其振动幅度也随之减小，实现电磁噪声的低减。The first magnetic isolation hole 12 provided in the rotor 1001 can guide the direction of the magnetic circuit generated by the permanent magnet 2 in each of the punch stacks 11, and in the case where the permanent magnet slots 15 do not need to be provided as chutes, The rotor magnetic circuit produces a ramp/displacement effect in the axial direction. At this time, the radial force wave in the air gap harmonic between the stator and the rotor is phase-shifted in the axial direction of the rotor core 1, and the amount of radial electromagnetic force received by the rotor 1001 in the axial direction is reduced, and the vibration thereof is vibrated. The amplitude is also reduced, achieving a low reduction in electromagnetic noise.
优选地，任意相邻两个冲片叠层11的第一隔磁孔12的个数相同且周向位置错开。Preferably, the number of the first magnetic isolation holes 12 of any two adjacent punch laminations 11 is the same and the circumferential position is shifted.
更优选地，上述转子1001沿轴向依次叠压的各个冲片叠层11上的第一隔磁孔12沿同一周向依次错位布置。例如，由上而下观察，该转子1001的第二冲片叠层上的第一隔磁孔12相对于第一冲片叠层上相应的第一隔磁孔12沿顺时针方向错开一定角度，第三冲片叠层上的第一隔磁孔12相对于第二冲片叠层上相应的第一隔磁孔12也沿顺时针方向错开一定角度，以此类推。可见，此时转子1001受到的径向电磁力是沿周向分布的，几乎不存在冲片叠层11之间径向电磁力的叠加，因此转子1001的振动幅度大大减小，电磁噪声低减效果明显。More preferably, the first magnetic isolation holes 12 on the respective lamination stacks 11 of the rotor 1001 which are sequentially laminated in the axial direction are sequentially displaced in the same circumferential direction. For example, viewed from above, the first magnetic isolation hole 12 on the second punch stack of the rotor 1001 is offset clockwise by a certain angle with respect to the corresponding first magnetic isolation hole 12 of the first punch stack. The first magnetic isolation hole 12 on the third punch laminate is also offset by a certain angle in the clockwise direction with respect to the corresponding first magnetic isolation hole 12 on the second punch laminate, and so on. It can be seen that the radial electromagnetic force received by the rotor 1001 is distributed along the circumferential direction, and there is almost no superposition of the radial electromagnetic force between the punch stacks 11, so that the vibration amplitude of the rotor 1001 is greatly reduced, and the electromagnetic noise is reduced. The effect is obvious.
具体地，对于上述转子，其冲片叠层11包括一一对应地设置在各个永磁体槽15的径向外侧且沿周向间隔的多个第一隔磁孔组，每个第一隔磁孔组包括多个第一隔磁孔12，多个所述第一隔磁孔12之间的磁通通路具有磁路中点21，磁路中点21与转子中心的径向连线构成第一隔磁孔组的磁路径向线13；其中，任意相邻两个冲片叠层11上，层叠对应的第一隔磁孔组的各自磁路径向线13沿周向错开。Specifically, for the above rotor, the punch stack 11 includes a plurality of first magnetic isolation holes arranged one-to-one correspondingly radially outward of the respective permanent magnet slots 15 and circumferentially spaced, each first magnetic isolation The hole group includes a plurality of first magnetic isolation holes 12, and a magnetic flux path between the plurality of first magnetic separation holes 12 has a magnetic circuit midpoint 21, and a radial connection between the magnetic circuit midpoint 21 and the rotor center constitutes a first The magnetic path of the magnetic isolation group is directed to the line 13; wherein, on any two adjacent chip laminations 11, the respective magnetic paths of the corresponding first magnetic permeation groups are staggered in the circumferential direction toward the line 13.
对于上述转子1001，永磁体2产生的磁通在经过冲片叠层11上的第一隔磁孔组引导后会形成按一定规律分布的磁路，而每个第一隔磁孔组上的磁路中点21恰好位于使多个第一隔磁孔12对称分布的直线上，同时，该直线与上述的磁路径向线13互相重合。当任意相邻两个冲片叠层11层叠对应的第一隔磁孔组的各自磁路径向线13沿周向错开时，层叠对应的第一隔磁孔组也必然沿周向错开。由此可见，在需要判断各冲片叠层11层叠对应的第一隔磁孔组是否有沿周向相互错开时，只需判断相应的各磁路径向线13在轴向上的投影是否重合即可。For the rotor 1001, the magnetic flux generated by the permanent magnet 2 is guided by the first magnetic shielding group on the punch stack 11 to form a magnetic circuit distributed in a regular manner, and each of the first magnetic blocking groups The magnetic circuit midpoint 21 is located on a straight line that symmetrically distributes the plurality of first magnetic isolation holes 12, and the straight line and the above-described magnetic path alignment line 13 coincide with each other. When the respective magnetic paths of the first pair of adjacent magnetic perforation holes 11 stacked in any two adjacent punch laminations 11 are circumferentially shifted toward the line 13, the corresponding first magnetic perforation groups are also necessarily shifted in the circumferential direction. It can be seen that when it is necessary to determine whether the first pair of magnetic shielding holes corresponding to the lamination of the respective lamination stacks 11 are circumferentially offset from each other, it is only necessary to determine whether the projections of the respective magnetic paths in the axial direction of the line 13 are coincident. Just fine.
更进一步地，上述层叠对应的多个第一隔磁孔组的各自磁路径向线13均与径向内侧相应的永磁体槽15的径向中垂线16沿周向错开。需要说明，永磁体槽15的径向中垂线16为永磁体槽15在长度方向上的中点与转子中心构成的直线。Further, the respective magnetic path direction lines 13 of the plurality of first magnetic flux barrier groups corresponding to the stack are circumferentially offset from the radial center line 16 of the permanent magnet grooves 15 corresponding to the radially inner side. It should be noted that the radial mid-perpendicular line 16 of the permanent magnet groove 15 is a straight line formed by the midpoint of the permanent magnet groove 15 in the longitudinal direction and the center of the rotor.
下面通过实施例对上述转子1001作进一步描述：The rotor 1001 described above is further described below by way of an embodiment:
实施例1Example 1
参照图2a至图2d，本实施例中的转子铁芯1001包括沿轴向叠压的上冲片叠层111和下冲片叠层112，其中任一永磁体槽15的径向外侧设有上第一隔磁孔组121和下第一 隔磁孔组122，上第一隔磁孔组121的上磁路径向线131和下第一隔磁孔组122的下磁路径向线132位于永磁体槽15的径向中垂线16的周向两侧；其中，上磁路径向线131与径向中垂线16的周向夹角为α1，下磁路径向线132与径向中垂线16的周向夹角为α2，上冲片叠层111与下冲片叠层112之间的磁路中心错位角度为α1+α2。Referring to Figures 2a to 2d, the rotor core 1001 of the present embodiment includes an upper punching lamination 111 and a lower punching lamination 112 which are axially laminated, wherein any of the permanent magnet slots 15 is provided on the radially outer side. The upper magnetic isolation hole group 121 and the lower first magnetic separation hole group 122, the upper magnetic path of the upper first magnetic isolation hole group 121 and the lower magnetic path of the lower first magnetic separation hole group 122 are located at the line 132 The circumferential sides of the radial center line 16 of the permanent magnet slot 15; wherein the upper magnetic path line 131 and the radial center line 16 have an angle α1 in the circumferential direction, and the lower magnetic path line 132 and the radial direction The circumferential angle of the perpendicular 16 is α2, and the magnetic center misalignment angle between the upper punch stack 111 and the lower punch stack 112 is α1 + α2.
可见，当上述转子1001的上冲片叠层111与下冲片叠层112层叠对应的永磁体槽15的径向中垂线16在轴向上的投影均一一重合时，上磁路径向线131在径向中垂线16的周向左侧且下磁路径向线132在径向中垂线16的周向右侧，此时上第一隔磁孔组121和下第一隔磁孔组122沿周向相互错开。因此，转子磁路在轴向上能产生斜极/错极效果，从而降低电磁噪声。It can be seen that when the projections of the radial mid-perpendicular lines 16 of the permanent magnet slots 15 corresponding to the stacking of the upper punching laminations 111 of the rotor 1001 in the axial direction are uniformly coincident, the upper magnetic path is The line 131 is on the circumferential left side of the vertical line 16 in the radial direction and the lower magnetic path direction line 132 is on the right side of the circumference of the perpendicular line 16 in the radial direction, at which time the first first magnetic isolation hole group 121 and the lower first magnetic separation group The hole groups 122 are staggered from each other in the circumferential direction. Therefore, the rotor magnetic circuit can produce a ramp/displacement effect in the axial direction, thereby reducing electromagnetic noise.
另外，本实施例1的转子还能设置为：转子铁芯1001包括沿轴向叠压的上冲片叠层111和下冲片叠层112，其中任一永磁体槽15的径向外侧设有上第一隔磁孔组121和下第一隔磁孔组122，上第一隔磁孔组121的上磁路径向线131和下第一隔磁孔组122的下磁路径向线132位于永磁体槽15的径向中垂线16的周向同侧；其中，上磁路径向线131与径向中垂线16的周向夹角为α1，下磁路径向线132与径向中垂线16的周向夹角为α2，上冲片叠层111与下冲片叠层112之间的磁路中心错位角度为|α1-α2|。Further, the rotor of the first embodiment can also be provided such that the rotor core 1001 includes an upper punching lamination 111 and a lower punching lamination 112 which are axially laminated, and a radial outer side of any of the permanent magnet slots 15 is provided. There are a first magnetic isolation hole group 121 and a lower first magnetic separation hole group 122, an upper magnetic path direction line 131 of the upper first magnetic separation hole group 121 and a lower magnetic path direction line 132 of the lower first magnetic separation hole group 122. Located on the same side in the circumferential direction of the radial mid-perpendicular line 16 of the permanent magnet slot 15; wherein the upper magnetic path is oriented at an angle α1 to the circumferential direction of the radially intermediate line 16, and the lower magnetic path is perpendicular to the line 132 and radially The circumferential angle of the line 16 is α2, and the center misalignment angle between the upper punch stack 111 and the lower punch stack 112 is |α1-α2|.
此时，虽然转子1001的上冲片叠层111与下冲片叠层112层叠对应的永磁体槽15的径向中垂线16在轴向上的投影均一一重合时，上磁路径向线131与下磁路径向线132均在径向中垂线16的周向同侧，但由于上述α1与α2不同，上第一隔磁孔组121和下第一隔磁孔组122沿周向同样也会相互错开。因此，转子磁路在轴向上也能产生斜极/错极效果，从而降低电磁噪声。At this time, although the projections of the radial vertical lines 16 of the permanent magnet grooves 15 corresponding to the stacking of the upper punching laminations 111 of the rotor 1001 in the axial direction are uniformly coincident, the upper magnetic path is Both the line 131 and the lower magnetic path line 132 are on the same side in the circumferential direction of the vertical line 16 in the radial direction, but since the above α1 and α2 are different, the upper first magnetic isolation hole group 121 and the lower first magnetic separation hole group 122 are the same in the circumferential direction. They will also be staggered from each other. Therefore, the rotor magnetic circuit can also produce a ramp/displacement effect in the axial direction, thereby reducing electromagnetic noise.
需要说明，本发明中磁路径向线13与径向中垂线16的位置关系不仅限于本实施例中所描述的情况，磁路径向线13与径向中垂线16是可以重合的，此时只需要确保任意相邻两个冲片叠层11的各自多个第一隔磁孔12在同一轴垂直面上的投影至少部分不重合，亦可实现转子斜极/错极效果。It should be noted that the positional relationship between the magnetic path line 13 and the radial mid-perpendicular line 16 in the present invention is not limited to the case described in the embodiment, and the magnetic path-to-line 13 and the radial mid-perpendicular line 16 are coincident. It is only necessary to ensure that the projections of the respective plurality of first magnetic isolation holes 12 of any two adjacent punch stacks 11 on the same axis perpendicular plane are at least partially non-coincident, and the rotor oblique/polar pole effect can also be achieved.
优选地，对于上述转子1001，每个冲片叠层11包括轴向叠压的多块硅钢片，硅钢片的厚度D1与第一隔磁孔的平均宽度D2满足：D1＜D2。需要说明，组成同一个冲片叠层11的多块硅钢片应该是完全一样的，不存在层叠对应的第一隔磁孔组沿周向错开的结构。Preferably, for the rotor 1001 described above, each of the punch stacks 11 includes a plurality of axially laminated silicon steel sheets, and the thickness D1 of the silicon steel sheets and the average width D2 of the first magnetic isolation holes satisfy: D1 < D2. It should be noted that the plurality of silicon steel sheets constituting the same punch stack 11 should be identical, and there is no structure in which the first magnetic shield group corresponding to the stack is circumferentially shifted.
更优选地，上述各个冲片叠层11上的多个永磁体槽15在轴向上应要一一对齐，不存在斜槽的结构，这样能大大降低转子的制造工艺要求，确保成品率。More preferably, the plurality of permanent magnet slots 15 on each of the punch stacks 11 are aligned one by one in the axial direction, and there is no chute structure, which can greatly reduce the manufacturing process requirements of the rotor and ensure the yield.
更优选地，本实施例中提及的所有第一隔磁孔12均应设为沿径向延伸的狭缝结构。More preferably, all of the first magnetic isolation holes 12 mentioned in this embodiment should be provided as a slit structure extending in the radial direction.
实施例2Example 2
参照图3a至图3d，本实施例中的转子1001包括沿轴向叠压的上冲片叠层、中冲片叠层和下冲片叠层，其中任一永磁体槽15的径向外侧均设有第一隔磁孔12；当上冲片叠层、中冲片叠层和下冲片叠层层叠对应的永磁体槽15的径向中垂线16在轴向上的投影相互重合时，相邻两个冲片叠层11的磁路径向线13沿周向错开一定角度。Referring to Figures 3a to 3d, the rotor 1001 of the present embodiment includes an upper punch lamination, a middle punch lamination and a lower punch lamination laminated in the axial direction, and the radial outer side of any of the permanent magnet slots 15 The first magnetic isolation holes 12 are respectively disposed; the projections of the radial vertical lines 16 of the permanent magnet slots 15 corresponding to the upper punch laminate, the intermediate laminate laminate and the lower punch laminate stack are coincident with each other in the axial direction. At the same time, the magnetic path of the adjacent two chip stacks 11 is shifted to the line 13 by a certain angle in the circumferential direction.
由此可见，当转子1001具有多个冲片叠层11时，只要确保各冲片叠层11层叠对应的永磁体槽15的径向中垂线16在轴向上的投影相互重合，相邻两个冲片叠层11的磁路径向线13沿周向错开一定角度，就能使转子磁路在轴向上产生斜极/错极不斜槽的结构，实现电磁噪声的低减。It can be seen that when the rotor 1001 has a plurality of punch stacks 11, it is ensured that the projections of the radial vertical lines 16 of the corresponding permanent magnet slots 15 in the axial direction coincide with each other, adjacent to each other. The magnetic path of the two punch stacks 11 is shifted by a certain angle in the circumferential direction of the line 13, so that the rotor magnetic circuit can have a structure of oblique pole/wrong pole non-oblique grooves in the axial direction, and the electromagnetic noise is reduced.
实施例3Example 3
参照图4a至图4b，本实施例中的转子1001包括沿轴向叠压的上冲片叠层和下冲片叠层，其中任一永磁体槽15的径向外侧均设有第一隔磁孔12；当上冲片叠层和下冲片叠层层叠对应的永磁体槽15的径向中垂线16在轴向上的投影相互重合时，两个冲片叠层11的磁路径向线13沿周向错开一定角度；此外在各个永磁体槽15的两端边缘均连通有径向向外延伸的第二隔磁孔14。Referring to Figures 4a to 4b, the rotor 1001 of the present embodiment includes an upper punch stack and a lower punch stack laminated in the axial direction, wherein any of the permanent magnet slots 15 is provided with a first partition on the radially outer side. The magnetic hole 12; when the projections of the radial vertical lines 16 of the permanent magnet grooves 15 corresponding to the upper punch stack and the lower punch stack are coincident with each other, the magnetic paths of the two punch stacks 11 The line 13 is offset in the circumferential direction by a certain angle; furthermore, at both end edges of the respective permanent magnet slots 15, a second magnetically permeable hole 14 extending radially outward is connected.
通过设置上述第二隔磁孔14，能进一步引导转子磁路形成斜极/错极，减小气隙谐波中的径向力波在转子轴向上产生的平均径向力，减小转子振动幅度。By providing the second magnetic isolation hole 14 described above, the rotor magnetic circuit can be further guided to form a ramp/dislocation pole, and the average radial force generated by the radial force wave in the air gap harmonic in the axial direction of the rotor is reduced, and the rotor is reduced. The amplitude of the vibration.
实施例4Example 4
本发明还提供了一种电机100，参照图5，该电机100包括定子1002、线圈绕组以及采用了实施例1中的转子1001，该转子1001还包括永磁体2。The present invention also provides an electric machine 100. Referring to FIG. 5, the electric machine 100 includes a stator 1002, a coil winding, and a rotor 1001 employing the embodiment 1, the rotor 1001 further including a permanent magnet 2.
以下对上述电机100进行试验，并将应用了另一种转子的电机作为对比例。其中，对比例的电机与本实施例的电机100的唯一区别在于，对比例的电机转子的上冲片叠层与下冲片叠层层叠对应的第一隔磁孔组均没有沿周向错开。另外，设本实施例的电机转子的磁路中心错位角度为10°。The above motor 100 was tested as follows, and a motor to which another rotor was applied was taken as a comparative example. The only difference between the motor of the comparative example and the motor 100 of the present embodiment is that the first magnetic perforation stack corresponding to the lamination stack of the motor rotor of the comparative example is not circumferentially staggered. . Further, it is assumed that the magnetic circuit center misalignment angle of the motor rotor of the present embodiment is 10°.
如图6a所示，通过将本实施例和对比例中电机的线反电势波形作对比，可以发现，本实施例中电机100的线反电势波形的正弦度改善明显，谐波数量减少使电机100的振动也相应减弱，减噪效果明显。As shown in FIG. 6a, by comparing the line back EMF waveforms of the motor in the present embodiment and the comparative example, it can be found that the sinusoidality of the line back EMF waveform of the motor 100 in this embodiment is improved significantly, and the number of harmonics is reduced to make the motor The vibration of 100 is also correspondingly weakened, and the noise reduction effect is obvious.
此外，参照图6b，通过将本实施例和对比例中电机的齿槽转矩波形作对比，可以发现，本实施例中电机100的齿槽转矩波形的幅值较小，齿槽转矩次数相应增加，有效 减小了电机100的震荡幅度，从而降低电机的噪声。Further, referring to FIG. 6b, by comparing the cogging torque waveforms of the motor in the present embodiment and the comparative example, it can be found that the cogging torque waveform of the motor 100 in this embodiment has a small amplitude and cogging torque. The number of times increases correspondingly, effectively reducing the amplitude of the oscillation of the motor 100, thereby reducing the noise of the motor.
再参照图6c，通过将本实施例和对比例中电机的负载转矩波形作对比，可以发现，本实施例中电机100的负载转矩波动小，负载转矩波动比值下降了大约一半，因此电机100的振动也相应减弱，减噪效果明显。Referring again to FIG. 6c, by comparing the load torque waveforms of the motor in the present embodiment and the comparative example, it can be found that the load torque fluctuation of the motor 100 is small in this embodiment, and the load torque fluctuation ratio is decreased by about half, so The vibration of the motor 100 is also correspondingly weakened, and the noise reduction effect is obvious.
另外，参照图7，本发明还提供了一种压缩机，该压缩机包括实施例4中的电机100。Further, referring to Fig. 7, the present invention also provides a compressor including the motor 100 of the fourth embodiment.
以上结合附图详细描述了本发明的优选实施方式，但是，本发明并不限于上述实施方式中的具体细节，在本发明的技术构思范围内，可以对本发明的技术方案进行多种简单变型，这些简单变型均属于本发明的保护范围。The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the embodiments described above, and various modifications may be made to the technical solutions of the present invention within the scope of the technical idea of the present invention. These simple variations are within the scope of the invention.
另外需要说明的是，在上述具体实施方式中所描述的各个具体技术特征，在不矛盾的情况下，可以通过任何合适的方式进行组合，为了避免不必要的重复，本发明对各种可能的组合方式不再另行说明。It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention has various possibilities. The combination method will not be described separately.
此外，本发明的各种不同的实施方式之间也可以进行任意组合，只要其不违背本发明的思想，其同样应当视为本发明所公开的内容。In addition, any combination of various embodiments of the invention may be made as long as it does not deviate from the idea of the invention, and it should be regarded as the disclosure of the invention.

Claims (12)

  1. 一种转子，包括转子铁芯(1)和多个永磁体(2)，其特征在于，所述转子铁芯(1)设有轴向贯通且沿周向均匀分布的多个永磁体槽(15)，多个所述永磁体槽(15)用于一一对应地插放多个所述永磁体(2)，各个所述永磁体槽(15)的径向外侧的所述转子铁芯部分分别设置有多个第一隔磁孔(12)；其中，所述转子铁芯(1)包括沿轴向叠压的多个冲片叠层(11)，任意相邻两个所述冲片叠层(11)的各自多个所述第一隔磁孔(12)在同一轴垂直面上的投影至少部分不重合。A rotor comprising a rotor core (1) and a plurality of permanent magnets (2), characterized in that the rotor core (1) is provided with a plurality of permanent magnet slots axially penetrating and uniformly distributed in the circumferential direction ( 15) a plurality of the permanent magnet slots (15) for inserting a plurality of the permanent magnets (2) in a one-to-one correspondence, the rotor cores radially outward of each of the permanent magnet slots (15) Partially disposed with a plurality of first magnetic isolation holes (12); wherein the rotor core (1) comprises a plurality of punch stacks (11) stacked in the axial direction, any adjacent two of the punches The projections of the respective plurality of first magnetic isolation holes (12) of the sheet stack (11) on the same axis perpendicular plane are at least partially non-coincident.
  2. 根据权利要求1所述的转子，其特征在于，任意相邻两个所述冲片叠层(11)的所述第一隔磁孔(12)个数相同且周向位置错开。The rotor according to claim 1, characterized in that the number of the first magnetic isolation holes (12) of any two adjacent ones of the punch stacks (11) is the same and the circumferential position is shifted.
  3. 根据权利要求2所述的转子，其特征在于，沿轴向依次叠压的各个所述冲片叠层(11)上的所述第一隔磁孔(12)沿同一周向依次错位布置。The rotor according to claim 2, characterized in that said first magnetic isolation holes (12) on each of said punch stacks (11) which are sequentially laminated in the axial direction are sequentially displaced in the same circumferential direction.
  4. 根据权利要求2或3所述的转子，其特征在于，所述冲片叠层(11)包括一一对应地设置在各个所述永磁体槽(15)的径向外侧且沿周向间隔的多个第一隔磁孔组，每个所述第一隔磁孔组包括多个所述第一隔磁孔(12)，多个所述第一隔磁孔(12)之间的磁通通路具有磁路中点(21)，所述磁路中点(21)与转子中心的径向连线构成所述第一隔磁孔组的磁路径向线(13)；其中，任意相邻两个所述冲片叠层(11)上，层叠对应的所述第一隔磁孔组的各自所述磁路径向线(13)沿周向错开。Rotor according to claim 2 or 3, characterized in that the punch stack (11) comprises a one-to-one correspondingly arranged radially outward of the respective permanent magnet slots (15) and circumferentially spaced a plurality of first magnetic isolation aperture groups, each of the first magnetic isolation aperture groups comprising a plurality of the first magnetic isolation apertures (12), and a magnetic flux between the plurality of the first magnetic isolation apertures (12) The path has a magnetic circuit midpoint (21), and the radial connection of the magnetic circuit midpoint (21) to the rotor center constitutes a magnetic path line (13) of the first magnetic isolation hole group; wherein, any adjacent On the two stacks (11), the respective magnetic paths of the corresponding first magnetic flux barrier groups are staggered in the circumferential direction toward the line (13).
  5. 根据权利要求4所述的转子，其特征在于，所述转子铁芯(1)至少包括沿轴向叠压的上冲片叠层(111)和下冲片叠层(112)，其中任一所述永磁体槽(15)的径向外侧设有上第一隔磁孔组(121)和下第一隔磁孔组(122)，所述上第一隔磁孔组(121)的上磁路径向线(131)和所述下第一隔磁孔组(122)的下磁路径向线(132)位于所述永磁体槽(15)的径向中垂线(16)的周向两侧；The rotor according to claim 4, characterized in that said rotor core (1) comprises at least an upper punch stack (111) and a lower punch stack (112) which are axially laminated, any of The radial outer side of the permanent magnet groove (15) is provided with an upper first magnetic isolation hole group (121) and a lower first magnetic separation hole group (122), and the upper first magnetic isolation hole group (121) The lower magnetic path line (132) of the magnetic path line (131) and the lower first magnetic hole group (122) is located in the circumferential direction of the radial perpendicular (16) of the permanent magnet groove (15) Both sides;
    其中，所述上磁路径向线(131)与所述径向中垂线(16)的周向夹角为α1，所述下磁路径向线(132)与所述径向中垂线(16)的周向夹角为α2，所述上冲片叠层(111)与所述下冲片叠层(112)之间的磁路中心错位角度为α1+α2。Wherein, the upper magnetic path direction line (131) and the radial middle perpendicular line (16) have an angle α1, and the lower magnetic path direction line (132) and the radial middle perpendicular line ( 16) The circumferential angle is α2, and the magnetic circuit center misalignment angle between the upper punch stack (111) and the lower punch stack (112) is α1+α2.
  6. 根据权利要求4所述的转子，其特征在于，所述转子铁芯(1)包括沿轴向叠压的上冲片叠层(111)和下冲片叠层(112)，其中任一所述永磁体槽(15)的径向外侧设有上第一隔磁孔组(121)和下第一隔磁孔组(122)，所述上第一隔磁孔组(121)的上磁路径向线(131)和所述下第一隔磁孔组(122)的下磁路径向线(132)位于所述永磁体槽(15)的径向中垂线(16)的周向同侧；The rotor according to claim 4, characterized in that said rotor core (1) comprises an upper punch stack (111) and a lower punch stack (112) laminated in the axial direction, any of which The radial outer side of the permanent magnet groove (15) is provided with an upper first magnetic isolation hole group (121) and a lower first magnetic separation hole group (122), and the upper first magnetic separation hole group (121) is magnetized The lower magnetic path line (132) of the path line (131) and the lower first magnetic hole group (122) is located on the same side in the circumferential direction of the radial center line (16) of the permanent magnet groove (15);
    其中，所述上磁路径向线(131)与所述径向中垂线(16)的周向夹角为α1，所述下磁路径向线(132)与所述径向中垂线(16)的周向夹角为α2，所述上冲片叠层(111)与所述下冲片叠层(112)之间的磁路中心错位角度为|α1-α2|。Wherein, the upper magnetic path direction line (131) and the radial middle perpendicular line (16) have an angle α1, and the lower magnetic path direction line (132) and the radial middle perpendicular line ( 16) The circumferential angle is α2, and the magnetic path center misalignment angle between the upper punch stack (111) and the lower punch stack (112) is |α1-α2|.
  7. 根据权利要求3所述的转子，其特征在于，所述第一隔磁孔(12)为径向延伸的狭缝结构。The rotor according to claim 3, wherein said first magnetic isolation hole (12) is a radially extending slit structure.
  8. 根据权利要求1所述的转子，其特征在于，各个所述冲片叠层(11)上的多个所述永磁体槽(15)轴向一一对齐。The rotor according to claim 1, characterized in that a plurality of said permanent magnet slots (15) on each of said punch stacks (11) are axially aligned one by one.
  9. 根据权利要求1所述的转子，其特征在于，各个所述永磁体槽(15)的两端边缘均连通有径向向外延伸的第二隔磁孔(14)。The rotor according to claim 1, characterized in that both end edges of each of said permanent magnet slots (15) are connected to a second magnetically permeable hole (14) extending radially outward.
  10. 根据权利要求1所述的转子，其特征在于，每个所述冲片叠层(11)包括轴向叠压的多块硅钢片，所述硅钢片的厚度D1与所述第一隔磁孔(12)的平均宽度D2满足：D1＜D2。The rotor according to claim 1, wherein each of said punch stacks (11) comprises an axially laminated plurality of silicon steel sheets, said silicon steel sheets having a thickness D1 and said first magnetic isolation holes The average width D2 of (12) satisfies: D1 < D2.
  11. 一种电机，其特征在于，所述电机(100)包括根据权利要求1～10中任意一项所述的转子。An electric machine, characterized in that the electric machine (100) comprises a rotor according to any one of claims 1 to 10.
  12. 一种压缩机，其特征在于，所述压缩机包括根据权利要求11所述的电机(100)。A compressor, characterized in that the compressor comprises a motor (100) according to claim 11.
PCT/CN2018/087062 2017-08-22 2018-05-16 Rotor, electric motor and compressor WO2019037479A1 (en)

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CN107317416A (en) * 2017-08-22 2017-11-03 广东美芝制冷设备有限公司 rotor, motor and compressor
CN109546774B (en) * 2018-12-04 2023-10-31 菲仕绿能科技(北京)有限公司 Rotor oblique pole structure of permanent magnet synchronous motor and assembly method
CN110022016B (en) * 2019-04-24 2024-05-28 广东金霸智能科技股份有限公司 Rotor chip and rotor and motor thereof
CN112564343B (en) * 2019-07-22 2022-08-30 北京和山逢泰科技有限公司 Rotating electric machine and rotor assembly thereof

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