WO2021114450A1 - 一种永磁电机的转子结构 - Google Patents

一种永磁电机的转子结构 Download PDF

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Publication number
WO2021114450A1
WO2021114450A1 PCT/CN2020/071215 CN2020071215W WO2021114450A1 WO 2021114450 A1 WO2021114450 A1 WO 2021114450A1 CN 2020071215 W CN2020071215 W CN 2020071215W WO 2021114450 A1 WO2021114450 A1 WO 2021114450A1
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Prior art keywords
permanent magnet
rotor
magnetic
magnetic pole
rotor structure
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PCT/CN2020/071215
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English (en)
French (fr)
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洪真
李朝阳
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深圳市中悦机电科技有限公司
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Publication of WO2021114450A1 publication Critical patent/WO2021114450A1/zh

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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
    • 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
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • 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 invention relates to the technical field of permanent magnet motors, in particular to a rotor structure of a permanent magnet motor.
  • the rotor poles of permanent magnet motors have only one set of magnetic fields, each pole has only one magnetic circuit, and the magnetic field of the rotor poles is fixed.
  • the stator magnetic field is used to drag the rotor magnetic field to rotate, and the stator magnetic field can only perform work on the rotor. This limits the efficiency and power density of the motor.
  • the present invention mainly provides a rotor structure of a permanent magnet motor to solve the problems in the prior art.
  • the present invention adopts the following technical solutions:
  • a rotor structure of a permanent magnet motor comprising a magnet and a permanent magnet group; a plurality of the permanent magnet groups are arranged in a circular array on the magnet, and the permanent magnet group separates the magnet into the inner magnetic poles of the rotor and The outer magnetic poles of the rotor; the magnetizing directions of the adjacent permanent magnet groups are opposite; the permanent magnet groups include a left permanent magnet and a right permanent magnet, and the inner ends of the left permanent magnet and the right permanent magnet are provided with a gap, the The outer ends of the left permanent magnet and the right permanent magnet are provided with isolation reinforcements made of non-magnetic materials.
  • the thickness of the inner magnetic pole of the rotor is 5 mm to 10 mm, and the thickness of the outer magnetic pole of the rotor is the same as that of the inner magnetic pole of the rotor.
  • the thickness of the left permanent magnet and the right permanent magnet are the same, and both are 4 mm to 6 mm.
  • the spacing of the isolation reinforcement between the adjacent permanent magnet groups is 1 mm to 3 mm.
  • the distance between the inner end surface of the isolation reinforcement member and the inner wall of the inner magnetic pole of the rotor is 0.5 mm to 1 mm
  • the distance between the outer end surface of the isolation reinforcement member and the outer wall of the outer magnetic pole of the rotor is 0.5 mm to 1 mm.
  • a recess is provided on one side of the isolation reinforcement member close to the left permanent magnet and the right permanent magnet.
  • the thickness of the isolation reinforcement member in the array direction of the permanent magnet group is 5 mm to 10 mm.
  • left permanent magnet and the right permanent magnet are provided with grooves on the inner magnetic poles of the rotor, and the inner magnetic poles of the rotor are provided with protruding bars matching the grooves.
  • the front end cover also includes a front end cover; the front end cover is arranged at the front end of the conductor magnet, and the front end cover is provided with a rotating shaft coaxial with the conductor magnet and a mounting position for mounting the bearing; the front end cover and Flanges are arranged between the magnetic conductors, and bolts for connecting the flanges at the two ends of the magnetic conductor penetrate through the gaps.
  • the magnetic conductor is formed by stacking silicon steel sheets.
  • the rotor structure of the present invention uses the permanent magnet group to separate the magnetic conductor into the inner magnetic pole of the rotor and the outer magnetic pole of the rotor as the inner and outer magnetic poles of the rotor.
  • the poles provide magnetism.
  • the rotor structure has internal and external double-sided magnetic poles, and each magnetic pole of the rotor consists of two sets of independent magnetic fields to form two magnetic circuits.
  • the stator magnetic field changes, one magnetic field of the rotor magnetic pole of this structure will increase, and the other magnetic field will increase. Decrease.
  • the stator magnetic field drives the rotor to rotate, it also controls the change in the size of the two magnetic fields of the rotor poles. The change in the size of the two magnetic circuits of the rotor improves the efficiency of the motor.
  • Figure 1 is a schematic cross-sectional view of the rotor structure of this embodiment
  • FIG. 2 is a schematic diagram of the structure of the magnetic conductor of this embodiment
  • Fig. 3 is an enlarged schematic diagram of part A of this embodiment.
  • the rotor structure of a permanent magnet motor of this embodiment includes a permeable magnet 1 and a permanent magnet group 2.
  • a number of the permanent magnet groups 2 are arranged in a circular array on the permeable magnet. 1 above, the permanent magnet group 2 separates the magnetic conductor 1 into the rotor inner magnetic pole 11 and the rotor outer magnetic pole 12; the magnetizing directions of the adjacent permanent magnet groups are opposite; the permanent magnet group 2 includes the left Permanent magnet 21 and right permanent magnet 22, the inner ends of the left permanent magnet 21 and the right permanent magnet 22 are provided with a gap 3, and the outer ends of the left permanent magnet 21 and the right permanent magnet 22 are provided with non-magnetic material ⁇ ISOLATION REINFORCEMENT4.
  • the left permanent magnet 21 and the right permanent magnet 22 are provided with a groove 23 on one side of the rotor inner magnetic pole 11, and the rotor inner magnetic pole 11 is provided with a protruding strip 13 matching the groove 23 .
  • It also includes a front end cover 5; the front end cover 5 is arranged at the front end of the conductor magnet 1, and the front end cover 5 is provided with a rotating shaft 7 coaxial with the conductor magnet 1 and a mounting position 51 for mounting bearings;
  • a flange 6 is arranged between the front end cover 5 and the magnet conductor, and bolts for connecting the flanges 6 at both ends of the magnet conductor 1 penetrate through the gap.
  • the magnetic conductor 1 is formed by stacking silicon steel sheets.
  • the thickness of the inner magnetic pole 11 of the rotor is 5 mm to 10 mm, and the thickness of the outer magnetic pole 12 of the rotor is the same as the thickness of the inner magnetic pole 11 of the rotor.
  • the thickness of the left permanent magnet 21 and the right permanent magnet 22 are both 4mm to 6mm.
  • the spacing of the isolation reinforcement 4 between the adjacent permanent magnet groups is 1 mm to 3 mm.
  • the distance from the inner end surface of the isolation reinforcement 4 to the inner wall of the rotor inner magnetic pole 11 is 0.5 mm to 1 mm, and the distance from the outer end surface of the isolation reinforcement 4 to the outer wall of the rotor outer magnetic pole 12 is 0.5 mm to 1 mm.
  • a recess 41 is provided on one side of the isolation reinforcement 4 close to the left permanent magnet 21 and the right permanent magnet 22.
  • the thickness of the isolation reinforcement 4 in the array direction of the permanent magnet group is 5 mm to 10 mm.
  • the thickness of the inner magnetic pole 11 of the rotor is the same as that of the outer magnetic pole 12 of the rotor, and the thickness of the inner magnetic pole 11 of the rotor is set to a; the thickness of the left permanent magnet 21 and the right permanent magnet 22 are the same, and the thickness of the left permanent magnet 21 Set as b; set the thickness of the isolation reinforcement 4 as c; set the distance between adjacent isolation reinforcements 4 as d; set the distance between the inner end face of the isolation reinforcement 4 and the inner wall of the rotor inner magnetic pole 11 as e; The distance between the outer end surface of the reinforcing member 4 and the inner wall of the outer magnetic pole 12 of the rotor is set as f; in this embodiment, a is 6mm, b is 5mm, c is 7mm, d is 2mm, e is 0.8mm, and f is 0.8mm. .
  • the permanent magnet group 2 is used to separate the permeable magnet 1 into the rotor inner magnetic pole 11 and the rotor outer magnetic pole 12 as the inner and outer magnetic poles of the rotor, and the permanent magnet group 2 is used as the constant magnetic source of the rotor.
  • the outer magnetic pole provides magnetic force.
  • the rotor structure has internal and external double-sided magnetic poles, and each magnetic pole of the rotor consists of two sets of independent magnetic fields to form two magnetic circuits. When the stator magnetic field changes, one magnetic field of the rotor magnetic pole of this structure will increase, and the other magnetic field will increase. Decrease. While the stator magnetic field drives the rotor to rotate, it also controls the change in the size of the two magnetic fields of the rotor poles. The change in the size of the two magnetic circuits of the rotor improves the efficiency of the motor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

本发明涉及永磁电机技术领域，且公开了一种永磁电机的转子结构，包括导磁体和永磁体组；永磁体组呈圆周阵列于导磁体上，永磁体组将导磁体分隔成转子内层磁极和转子外层磁极；相邻永磁铁组的充磁方向相反；永磁体组包括左永磁体和右永磁体，左永磁体与右永磁体的内端设置有空隙，左永磁体与右永磁体的外端设置有非导磁材料制成的隔离加强件。该转子结构具有内、外双面两项磁极，且转子的每个磁极由两组独立磁场构成两个磁路，当定子磁场变化时，该结构转子磁极的一路磁场会增强，另一路磁场会减小。定子磁场在驱动转子旋转的同时也控制转子磁极两路磁场的大小变化，以转子两个磁路大小的变化来提高电机的效率。

Description

一种永磁电机的转子结构 技术领域
本发明涉及永磁电机技术领域，具体为一种永磁电机的转子结构。
背景技术
随着电机技术和永磁材料的发展，永磁转子以其高效率、高功率密度、高功率因数等优势，在发电机及电动机系统中得到了广泛的应用。
现阶段的永磁电机的转子磁极只有一组磁场，每个磁极只有一个磁路，并且转子磁极的磁场都是固定不变的。在电动机实际运行中，仅利用定子磁场拖着转子磁场旋转的方式做功，定子磁场只能单一地对转子做功。这就限制了电机的效率以及功率密度。
发明内容
本发明主要是提供一种永磁电机的转子结构，解决现有技术中的问题。
为了解决上述技术问题，本发明采用如下技术方案：
一种永磁电机的转子结构，包括导磁体和永磁体组；若干所述永磁体组呈圆周阵列于所述导磁体上，所述永磁体组将所述导磁体分隔成转子内层磁极和转子外层磁极；相邻所述永磁铁组的充磁方向相反；所述永磁体组包括左永磁体和右永磁体，所述左永磁体与右永磁体的内端设置有空隙，所述左永磁体与右永磁体的外端设置有非导磁材料制成的隔离加强件。
进一步，所述转子内层磁极的厚度为5mm至10mm，所述转子外层磁极的厚度与所述转子内层磁极相同。
进一步，所述左永磁体与右永磁体的厚度相同均为4mm至6mm。
进一步，所述相邻永磁铁组之间的所述隔离加强件的间距为1mm至3mm。
进一步，所述隔离加强件内端面到所述转子内层磁极的内壁距离为0.5mm 至1mm，所述隔离加强件外端面到所述转子外层磁极的外壁距离0.5mm至1mm。
进一步，所述隔离加强件靠近所述左永磁体和右永磁体的一侧面上设置有凹陷。
进一步，所述隔离加强件在所述永磁铁组阵列方向上的厚度为5mm至10mm。
进一步，所述左永磁体与右永磁体上位于所述转子内层磁极的一面设置有凹槽，所述转子内层磁极上设置有与所述凹槽相配合的凸条。
进一步，还包括前端盖；所述前端盖设置于所述导磁体前端，所述前端盖上设置有与所述导磁体同轴心的转轴及用于安装轴承的安装位；所述前端盖与所述导磁体之间设置有法兰，所述空隙内贯穿设置有用于连接所述导磁体两端所述法兰的螺栓。
进一步，所述导磁体由硅钢片叠装而成。
有益效果：本发明的转子结构，利用永磁体组将导磁体分隔成转子内层磁极和转子外层磁极，作为转子的内、外磁极，利用永磁体组作为转子的恒磁源以为内、外磁极提供磁力。该转子结构具有内、外双面两项磁极，且转子的每个磁极由两组独立磁场构成两个磁路，当定子磁场变化时，该结构转子磁极的一路磁场会增强，另一路磁场会减小。定子磁场在驱动转子旋转的同时也控制转子磁极两路磁场的大小变化，以转子两个磁路大小的变化来提高电机的效率。
附图说明
图1为本实施例的转子结构断面示意图；
图2为本实施例的导磁体结构示意图；
图3为本实施例的A部放大示意图。
附图标记：导磁体1、转子内层磁极11、转子外层磁极12、凸条13、永 磁体组2、左永磁体21、右永磁体22、凹槽23、空隙3、隔离加强件4、凹陷41、前端盖5、安装位51、法兰6、转轴7。
具体实施方式
以下将结合实施例对本发明涉及的一种永磁电机的转子结构技术方案进一步详细说明。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
如图1、图2、图3所示，本实施例的一种永磁电机的转子结构，包括导磁体1和永磁体组2；若干所述永磁体组2呈圆周阵列于所述导磁体1上，所述永磁体组2将所述导磁体1分隔成转子内层磁极11和转子外层磁极12；相邻所述永磁铁组的充磁方向相反；所述永磁体组2包括左永磁体21和右永磁体22，所述左永磁体21与右永磁体22的内端设置有空隙3，所述左永磁体21与右永磁体22的外端设置有非导磁材料制成的隔离加强件4。所述左永磁体21与右永磁体22上位于所述转子内层磁极11的一面设置有凹槽23，所述转子内层磁极11上设置有与所述凹槽23相配合的凸条13。还包括前端盖5；所述前端盖5设置于所述导磁体1前端，所述前端盖5上设置有与所述导磁体1同轴心的转轴7及用于安装轴承的安装位51；所述前端盖5与所述导磁体之间设置有法兰6，所述空隙内贯穿设置有用于连接所述导磁体1两端所述法兰6的螺栓。所述导磁体1由硅钢片叠装而成。所述转子内层磁极11的厚度为5mm至10mm，所述转子外层磁极12的厚度与所述转子内层磁极11相同。 所述左永磁体21与右永磁体22的厚度相同均为4mm至6mm。所述相邻永磁铁组之间的所述隔离加强件4的间距为1mm至3mm。所述隔离加强件4内端面到所述转子内层磁极11的内壁距离为0.5mm至1mm，所述隔离加强件4外端面到所述转子外层磁极12的外壁距离0.5mm至1mm。所述隔离加强件4靠近所述左永磁体21和右永磁体22的一侧面上设置有凹陷41。所述隔离加强件4在所述永磁铁组阵列方向上的厚度为5mm至10mm。
具体的，转子内层磁极11与转子外层磁极12的厚度相同，将转子内层磁极11的厚度设为a；左永磁体21与右永磁体22的厚度相同，将左永磁体21的厚度设为b；将隔离加强件4的厚度设为c；相邻隔离加强件4之间的距离设置为d；隔离加强件4的内端面到转子内层磁极11的内壁距离设为e；隔离加强件4的外端面到转子外层磁极12的内壁距离设为f；在本实施例中，a为6mm，b为5mm，c为7mm，d为2mm，e为0.8mm，f为0.8mm。
本发明的转子结构，利用永磁体组2将导磁体1分隔成转子内层磁极11和转子外层磁极12，作为转子的内、外磁极，利用永磁体组2作为转子的恒磁源以为内、外磁极提供磁力。该转子结构具有内、外双面两项磁极，且转子的每个磁极由两组独立磁场构成两个磁路，当定子磁场变化时，该结构转子磁极的一路磁场会增强，另一路磁场会减小。定子磁场在驱动转子旋转的同时也控制转子磁极两路磁场的大小变化，以转子两个磁路大小的变化来提高电机的效率。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。

Claims (10)

  1. 一种永磁电机的转子结构，其特征在于：包括导磁体和永磁体组；若干所述永磁体组呈圆周阵列于所述导磁体上，所述永磁体组将所述导磁体分隔成转子内层磁极和转子外层磁极；相邻所述永磁铁组的充磁方向相反；所述永磁体组包括左永磁体和右永磁体，所述左永磁体与右永磁体的内端设置有空隙，所述左永磁体与右永磁体的外端设置有非导磁材料制成的隔离加强件。
  2. 根据权利要求1所述的一种永磁电机的转子结构，其特征在于：所述转子内层磁极的厚度为5mm至10mm，所述转子外层磁极的厚度与所述转子内层磁极相同。
  3. 根据权利要求1所述的一种永磁电机的转子结构，其特征在于：所述左永磁体与右永磁体的厚度相同均为4mm至6mm。
  4. 根据权利要求1所述的一种永磁电机的转子结构，其特征在于：所述相邻永磁铁组之间的所述隔离加强件的间距为1mm至3mm。
  5. 根据权利要求1所述的一种永磁电机的转子结构，其特征在于：所述隔离加强件内端面到所述转子内层磁极的内壁距离为0.5mm至1mm，所述隔离加强件外端面到所述转子外层磁极的外壁距离0.5mm至1mm。
  6. 根据权利要求1所述的一种永磁电机的转子结构，其特征在于：所述隔离加强件靠近所述左永磁体和右永磁体的一侧面上设置有凹陷。
  7. 根据权利要求1所述的一种永磁电机的转子结构，其特征在于：所述隔离加强件在所述永磁铁组阵列方向上的厚度为5mm至10mm。
  8. 根据权利要求1所述的一种永磁电机的转子结构，其特征在于：所述左永磁体与右永磁体上位于所述转子内层磁极的一面设置有凹槽，所述转子内层磁极上设置有与所述凹槽相配合的凸条。
  9. 根据权利要求1所述的一种永磁电机的转子结构，其特征在于：还包括前端盖；所述前端盖设置于所述导磁体前端，所述前端盖上设置有与所述 导磁体同轴心的转轴及用于安装轴承的安装位；所述前端盖与所述导磁体之间设置有法兰，所述空隙内贯穿设置有用于连接所述导磁体两端所述法兰的螺栓。
  10. 根据权利要求1所述的一种永磁电机的转子结构，其特征在于：所述导磁体由硅钢片叠装而成。
PCT/CN2020/071215 2019-12-09 2020-01-09 一种永磁电机的转子结构 WO2021114450A1 (zh)

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