WO2015027556A1 - 一种永磁转子结构 - Google Patents

一种永磁转子结构 Download PDF

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Publication number
WO2015027556A1
WO2015027556A1 PCT/CN2013/085790 CN2013085790W WO2015027556A1 WO 2015027556 A1 WO2015027556 A1 WO 2015027556A1 CN 2013085790 W CN2013085790 W CN 2013085790W WO 2015027556 A1 WO2015027556 A1 WO 2015027556A1
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WIPO (PCT)
Prior art keywords
permanent magnet
axial
magnetic conductive
rotor structure
block
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PCT/CN2013/085790
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English (en)
French (fr)
Inventor
潘明攀
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中山大洋电机股份有限公司
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Publication of WO2015027556A1 publication Critical patent/WO2015027556A1/zh

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Classifications

    • 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

Definitions

  • the utility model relates to a permanent magnet rotor structure.
  • the conventional permanent magnet rotor structure includes a rotor core and a permanent magnet (A), and a plurality of magnetic blocks (B) are disposed on the rotor core, and are formed between adjacent two magnetic blocks (B).
  • the purpose of the utility model is to provide a permanent magnet rotor structure, which has the advantages of simple and reliable installation, high reliability and long service life.
  • a permanent magnet rotor structure comprising a rotor core and a permanent magnet, a plurality of magnetic blocks are arranged on the rotor core, and a radial groove for mounting the permanent magnet is formed between the adjacent two magnetic blocks, in the radial direction
  • a stopper is protruded from the magnetic conductive block on both sides of the opening of the groove, and at least one outer surface of the magnet is provided with an axial recess, at least one outer surface of the magnetic block is provided with an axial protrusion, and the permanent magnet is mounted on the radial groove.
  • the axial protrusion of the magnetic block is embedded in the axial recess of the 7 magnet;
  • At least one outer surface of the permanent magnet is provided with an axial protrusion
  • at least one outer surface of the magnetic block is provided with an axial recess
  • the permanent magnet is mounted inside the radial groove
  • the axial protrusion of the permanent magnet is embedded in the axis of the magnetic block Inside the notch.
  • the rotor core described above includes an inner core provided with a central shaft hole and a plurality of magnetic conductive blocks disposed at the outer periphery of the inner core.
  • the axial recess described above penetrates the outer surface of the permanent magnet, and the axial projection extends through the outer surface of the magnetic block. All of the axial ports and axial projections described above are circumferentially arranged.
  • the inner core and the magnetic conductive block described above are connected together through an intermediate insulating layer.
  • the insulating layer described above comprises a front end panel, a rear end panel and an intermediate connecting post, and the two ends of the intermediate connecting post are respectively connected to the front end panel and the rear end panel.
  • the magnetic conductive block described above is provided with an axially open groove, and a plurality of reinforcing ribs are protruded outside the intermediate connecting column, and the reinforcing rib projects into the axially open groove.
  • the outer surface of the inner iron core is provided with a plurality of card slots, and a plurality of latches are protruded from the inner surface of the middle connecting post, and the middle connecting post is nested outside the inner iron core, and the card block is embedded in the card slot.
  • the utility model has the following effects: 1) a plurality of magnetic conductive blocks are arranged on the rotor core, and radial grooves for mounting permanent magnets are formed between adjacent two magnetic conductive blocks, A baffle is protruded from the magnetic blocks on both sides of the opening of the groove, and at least one outer surface of the permanent magnet is provided with an axial recess, at least one outer surface of the magnetic block is provided with an axial protrusion, and the permanent magnet is mounted in the radial concave Inside the slot, the axial protrusion of the magnetic block is embedded in the axial recess of the permanent magnet; or at least one outer surface of the permanent magnet is provided with an axial protrusion, and at least one outer surface of the magnetic block is provided with an axial recess, the permanent magnet Mounted in the radial groove, the axial protrusion of the permanent magnet is embedded in the axial recess of the magnetic block, the structure is single, through the axial recess of the permanent magnet and the
  • the inner iron core and the magnetic conductive block are connected together through an intermediate insulating layer, the insulating layer includes a front end panel, a rear end panel and an intermediate connecting column, and the front connecting panel is respectively connected with a front end panel and a rear end panel, the structure
  • the cylinder is simple, the process is simple, the operation is convenient, and the connection strength is large, the anti-vibration effect is good, and the reliability is high;
  • the axial opening groove is arranged on the magnetic conductive block, and some reinforcing ribs are protruded outside the middle connecting column, and the reinforcing rib protrudes into the Inside the axially open groove, a plurality of card slots are arranged on the outer surface of the inner core, and a plurality of blocks protrude from the inner surface of the middle connecting column, and the middle connecting column is nested outside the inner iron core, and the card block is embedded in the card slot, the structure is simple , can improve the inner iron core and the permanent magnet The strength of the connection,
  • Figure 1 is a schematic view showing the structure of a conventional permanent magnet rotor structure.
  • FIG. 2 is a perspective view of the permanent magnet rotor of the present invention.
  • FIG. 3 is an exploded perspective view of the permanent magnet rotor of the present invention.
  • Figure 4 is a front elevational view of the permanent magnet rotor of the first embodiment.
  • Figure 5 is a cross-sectional view taken along line A-A of Figure 4.
  • Figure 6 is a cross-sectional view taken along line B-B of Figure 4.
  • Figure 7 is a perspective view of a magnetically permeable block in the first embodiment.
  • Figure 8 is a perspective view of the permanent magnet of the first embodiment.
  • FIG. 9 is a schematic structural view of a permanent magnet rotor in the second embodiment.
  • Figure 10 is a schematic view showing the structure of a permanent magnet rotor in the third embodiment.
  • Embodiment 1 As shown in FIG. 2 to FIG. 8 , the utility model relates to a permanent magnet rotor structure, which comprises a rotor core 1 and a permanent magnet 2 , and a plurality of magnetic blocks 11 are arranged on the rotor core 1 , adjacent to each other.
  • a radial groove 110 for mounting the permanent magnet 2 is formed between the two magnetic conductive blocks 11, and a stopper hook 111 is protruded on the magnetic conductive block 11 on both sides of the opening portion of the radial groove 110, and the permanent magnet 2
  • the outer surface is provided with an axial recess 21, an outer surface of the magnetic block 1 1 is provided with an axial protrusion 112, the permanent magnet 2 is mounted inside the radial groove 110, and the axial protrusion 112 of the magnetic block 11 is embedded in the permanent magnet 2 inside the axial recess 21 .
  • the rotor core 1 includes an inner core 12 provided with a center shaft hole 120 and a plurality of magnetic blocks 11 disposed at the outer periphery of the inner core 12.
  • the axial recess 21 penetrates the outer side surface of the permanent magnet 2, and the axial projection 12 extends through the outer surface of the magnetic block 11.
  • All axial ports 21 and axial projections 22 are evenly arranged circumferentially as viewed from the end.
  • the inner core 12 and the magnetically permeable block 11 are joined together by an intermediate insulating layer 3.
  • the insulating layer 3 includes a front end panel 31, a rear end panel 32, and an intermediate connecting post 33. The two ends of the intermediate connecting post 33 are respectively connected to the front end panel 31 and the rear end panel 32.
  • the magnetic conductive block 11 is provided with an axial opening groove 114, and a plurality of reinforcing ribs are protruded outside the intermediate connecting post 33.
  • the reinforcing rib 331 projects into the axial opening groove 114.
  • a plurality of card slots 121 are disposed on the outer surface of the inner core 12, and a plurality of latches 332 protrude from the inner surface of the intermediate connecting post 33.
  • the intermediate connecting post 33 is nested outside the inner core 12, and the latching block 332 is embedded in the slot 121.
  • the principle of the utility model is: an axial recess 21 is arranged on the outer surface of the permanent magnet 2, and an outer surface of the magnetic block 11 is provided with an axial protrusion 112, and the permanent magnet 2 is mounted inside the radial groove 110, and the magnetic field is guided.
  • the axial protrusion 112 of the block 11 is embedded in the axial recess 21 of the permanent magnet 2, and the structure is simple, which can effectively improve the connection strength between the permanent magnet 2 and the magnetic block 11, thereby improving the operation of the permanent magnet rotor. Reliability, reducing the occurrence of faults and extending the service life of permanent magnet rotors.
  • Embodiment 2 The structure of the embodiment is basically the same as that of the first embodiment. The only difference is that: an axial protrusion 22 is disposed on one outer surface of the permanent magnet 2, and an axial recess is disposed on an outer surface of the magnetic block 11. 113, as shown in Figure 9.
  • the principle of the utility model is: a plurality of magnetic conductive blocks 11 are arranged on the rotor core 1, and a radial groove 110 for mounting the permanent magnet 2 is formed between the adjacent two magnetic conductive blocks 11, in the radial groove 110
  • a stopper hook 111 is protruded from the magnetic conductive block 11 on both sides of the opening portion, an axial protrusion 22 is disposed on one outer side surface of the permanent magnet 2, and an axial recess 113 is provided on an outer surface of the magnetic conductive block 11, the permanent magnet 2 is installed in the radial groove 110, and the axial protrusion 22 of the permanent magnet 2 is embedded in the axial recess 113 of the magnetic block 11.
  • the structure is simple, easy to install, high in reliability and long in service life.
  • Embodiment 3 The structure of the embodiment is basically the same as that of the first embodiment. The only difference is that: the axial recess 21 is disposed on the two outer surfaces of the permanent magnet 2, and the axial convex is disposed on the two outer surfaces of the magnetic block 11. From 112, as shown in FIG.
  • the principle of the utility model is: a plurality of magnetic conductive blocks 11 are arranged on the rotor core 1, and a radial groove 110 for mounting the permanent magnet 2 is formed between the adjacent two magnetic conductive blocks 11, in the radial groove 110 a stopper hook 111 is protruded from the magnetic conductive block 11 on both sides of the opening portion, and an axial recess 21 is provided on both outer side surfaces of the permanent magnet 2, The outer side surfaces of the magnetic block 11 are provided with axial protrusions 112, and the permanent magnets 2 are mounted inside the radial grooves 110.
  • the axial protrusions 112 of the magnetic block 11 are embedded in the axial recesses 21 of the permanent magnets 2,
  • the structure is simple and firm, and the connection strength between the permanent magnet 2 and the magnetic conductive block 11 can be effectively improved, thereby improving the reliability of the permanent magnet rotor operation, reducing the occurrence of failure, and prolonging the service life of the permanent magnet rotor.

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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

一种永磁转子结构，包括转子铁芯（1）和永磁体（2），转子铁芯（1）上设置若干块导磁块（11），在相邻两导磁块（11）之间形成用于安装永磁体（2）的径向凹槽（110），在径向凹槽（110）的开口部的两侧导磁块（11）上凸出挡钩（111），永磁体（2）至少一个外侧表面设置轴向凹口（21），导磁块（11）至少一个外侧表面设置轴向凸起（112），永磁体（2）安装在径向凹槽（110）里面，导磁块（11）的轴向凸起（112）镶嵌在永磁体（2）的轴向凹口（21）里面；或者永磁体（2）至少一个外侧表面设置轴向凸起（22），导磁块（11）至少一个外侧表面设置轴向凹口（113），永磁体（2）安装在径向凹槽（110）里面，永磁体（2）的轴向凸起（22）镶嵌在导磁块（11）的轴向凹口（113）里面。该结构简单、安装方便牢靠、可靠性高、使用寿命长。

Description

一种永磁转子结构
技术领域：
本实用新型涉及一种永磁转子结构。
背景技术：
如图 1 所示， 传统的永磁转子结构包括转子铁芯和永磁体 ( A ), 转子铁芯 上设置若干块导磁块（B ), 在相邻两导磁块（B )之间形成用于安装永磁体（A ) 的径向凹槽（B1 ), 在径向凹槽（B1 ) 的开口部的两侧导磁块（B )上凸出挡钩 ( B2 ), 但是这种永磁转子结构由于永磁体与导磁块之间的连接强度不足， 导致 在永磁转子运行的过程中容易出现问题， 严重影响电机的正常运行， 电机运行 的可靠性低， 存在较大的安全隐患。
发明内容：
本实用新型的目的是提供一种永磁转子结构， 该结构筒单、 安装方便牢靠、 可靠性高、 使用寿命长。
本实用新型的目的是通过下述技术方案予以实现的。
一种永磁转子结构， 包括转子铁芯和永磁体， 转子铁芯上设置若干块导磁 块， 在相邻两导磁块之间形成用于安装永磁体的径向凹槽， 在径向凹槽的开口 部的两侧导磁块上凸出挡钩， 7 磁体至少一个外侧表面设置轴向凹口， 导磁块 至少一个外侧表面设置轴向凸起， 永磁体安装在径向凹槽里面， 导磁块的轴向 凸起镶嵌在 7 磁体的轴向凹口里面；
或者永磁体至少一个外侧表面设置轴向凸起， 导磁块至少一个外侧表面设 置轴向凹口， 永磁体安装在径向凹槽里面， 永磁体的轴向凸起镶嵌在导磁块的 轴向凹口里面。
上述所述的转子铁芯包括设置有中心轴孔的内铁芯和设置在内铁芯外围的 若干块导磁块。
上述所述的轴向凹口贯穿永磁体的外侧表面， 轴向凸起贯穿导磁块的外侧 表面。 上述所述的所有轴向 口和轴向凸起周向均勾排布。
上述所述的内铁芯和导磁块通过中间的绝缘层连接在一起。
上述所述的绝缘层包括前端面板、 后端面板和中间连接柱， 中间连接柱两 端分别连接前端面板、 后端面板。
上述所述的导磁块上设置轴向开口槽， 中间连接柱外侧凸出若干加强筋， 加强筋伸入到轴向开口槽里面。
上述所述的内铁芯外侧表面设置若干卡槽， 中间连接柱内侧表面凸出若干 卡块， 中间连接柱嵌套在内铁芯外面， 卡块镶嵌在卡槽里面。
本实用新型与现有技术相比， 具有如下效果： 1 )转子铁芯上设置若干块导 磁块， 在相邻两导磁块之间形成用于安装永磁体的径向凹槽， 在径向凹槽的开 口部的两侧导磁块上凸出挡钩， 永磁体至少一个外侧表面设置轴向凹口， 导磁 块至少一个外侧表面设置轴向凸起， 永磁体安装在径向凹槽里面， 导磁块的轴 向凸起镶嵌在永磁体的轴向凹口里面； 或者永磁体至少一个外侧表面设置轴向 凸起， 导磁块至少一个外侧表面设置轴向凹口， 永磁体安装在径向凹槽里面， 永磁体的轴向凸起镶嵌在导磁块的轴向凹口里面， 该结构筒单， 通过在永磁体 的轴向凹口和导磁块的轴向凸起相嵌和， 提高永磁体和导磁块之间的连接强度， 从而提高永磁转子运行的可靠性， 减少故障的发生， 延长永磁转子的使用寿命； 2 )轴向凹口贯穿永磁体的外侧表面， 轴向凸起贯穿导磁块的外侧表面， 使永磁 体安装在径向凹槽更加筒单方便， 而且可以更加轴向凹口与轴向凸起的接触面 积， 进而提高永磁体和导磁块之间的连接强度； 3 ) 内铁芯和导磁块通过中间的 绝缘层连接在一起， 绝缘层包括前端面板、 后端面板和中间连接柱， 中间连接 柱两端分别连接前端面板、 后端面板， 该结构筒单、 工艺筒单、 操作方便， 而 且连接强度大，防震效果好， 可靠性高； 4 )导磁块上设置轴向开口槽， 中间连 接柱外侧凸出若干加强筋， 加强筋伸入到轴向开口槽里面， 内铁芯外侧表面设 置若干卡槽， 中间连接柱内侧表面凸出若干卡块， 中间连接柱嵌套在内铁芯外 面， 卡块镶嵌在卡槽里面， 该结构筒单， 可以很好地提高内铁芯和永磁体之间 的连接强度， 从而提高永磁转子运行的可靠性。
附图说明：
图 1 是传统永磁转子结构的结构示意图。
图 2 是本实用新型永磁转子的立体图。
图 3 是本实用新型永磁转子的分解示意图。
图 4 是实施例一中永磁转子的前视图。
图 5 是图 4中 A-A剖视图。
图 6 是图 4中 B-B剖视图。
图 7 是实施例一中导磁块的立体图。
图 8 是实施例一中永磁体的立体图。
图 9 是实施例二中永磁转子的结构示意图。
图 10 是实施例三中永磁转子的结构示意图。
具体实施方式：
下面通过具体实施例并结合附图对本实用新型作进一步详细的描述。
实施例一： 如图 2至图 8所示， 本实用新型是一种永磁转子结构， 包括转 子铁芯 1和永磁体 2 , 转子铁芯 1上设置若干块导磁块 11 , 在相邻两导磁块 11 之间形成用于安装永磁体 2的径向凹槽 110 ,在径向凹槽 1 10的开口部的两侧导 磁块 11上凸出挡钩 111 , 永磁体 2—个外侧表面设置轴向凹口 21 , 导磁块 1 1 一个外侧表面设置轴向凸起 112 , 永磁体 2安装在径向凹槽 110里面， 导磁块 11的轴向凸起 112镶嵌在永磁体 2的轴向凹口 21里面。
转子铁芯 1包括设置有中心轴孔 120的内铁芯 12和设置在内铁芯 12外围 的若干块导磁块 11。
轴向凹口 21贯穿永磁体 2的外侧表面， 轴向凸起 1 12贯穿导磁块 11的外 侧表面。
从端部上看， 所有轴向 口 21和轴向凸起 22周向均匀排布。
内铁芯 12和导磁块 11通过中间的绝缘层 3连接在一起。 绝缘层 3包括前端面板 31、 后端面板 32和中间连接柱 33, 中间连接柱 33 两端分别连接前端面板 31、 后端面板 32。
导磁块 11上设置轴向开口槽 114,中间连接柱 33外侧凸出若干加强筋 331, 加强筋 331伸入到轴向开口槽 114里面。
内铁芯 12外侧表面设置若干卡槽 121,中间连接柱 33内侧表面凸出若干卡 块 332, 中间连接柱 33嵌套在内铁芯 12外面， 卡块 332镶嵌在卡槽 121里面。
本实用新型的原理是： 在永磁体 2—个外侧表面设置轴向凹口 21, 导磁块 11一个外侧表面设置轴向凸起 112, 永磁体 2安装在径向凹槽 110里面， 导磁 块 11的轴向凸起 112镶嵌在永磁体 2的轴向凹口 21里面， 该结构筒单， 可以 有效提高永磁体 2和导磁块 11之间的连接强度， 从而提高永磁转子运行的可靠 性， 减少故障的发生， 延长永磁转子的使用寿命。
实施例二： 本实施例与实施例一的结构基本一致， 唯一的不同点是： 在永 磁体 2的一个外侧表面设置轴向凸起 22,在导磁块 11一个外侧表面设置轴向凹 口 113, 如图 9所示。
本实用新型的原理是： 转子铁芯 1上设置若干块导磁块 11, 在相邻两导磁 块 11之间形成用于安装永磁体 2的径向凹槽 110, 在径向凹槽 110的开口部的 两侧导磁块 11上凸出挡钩 111, 在永磁体 2的一个外侧表面设置轴向凸起 22, 在导磁块 11的一个外侧表面设置轴向凹口 113, 永磁体 2安装在径向凹槽 110 里面， 永磁体 2的轴向凸起 22镶嵌在导磁块 11的轴向凹口 113里面， 该结构 筒单、 安装方便牢靠、 可靠性高、 使用寿命长。
实施例三： 本实施例与实施例一的结构基本一致， 唯一的不同点是： 在永 磁体 2两个外侧表面设置轴向凹口 21,在导磁块 11两个外侧表面设置轴向凸起 112, 如图 10所示。
本实用新型的原理是： 转子铁芯 1上设置若干块导磁块 11, 在相邻两导磁 块 11之间形成用于安装永磁体 2的径向凹槽 110, 在径向凹槽 110的开口部的 两侧导磁块 11上凸出挡钩 111, 在永磁体 2两个外侧表面设置轴向凹口 21, 在 导磁块 11两个外侧表面设置轴向凸起 112 ,永磁体 2安装在径向凹槽 110里面， 导磁块 11的轴向凸起 112镶嵌在永磁体 2的轴向凹口 21里面， 该结构筒单， 安装方便牢固， 可以有效提高永磁体 2和导磁块 11之间的连接强度， 从而提高 永磁转子运行的可靠性， 减少故障的发生， 延长永磁转子的使用寿命。

Claims

权利要求
1、 一种永磁转子结构， 包括转子铁芯 （1 )和永磁体（2), 转子铁芯 （1 ) 上设置若干块导磁块（ 11 ),在相邻两导磁块（ 11 )之间形成用于安装永磁体（ 2 ) 的径向凹槽（110), 在径向凹槽（110) 的开口部的两侧导磁块（11 )上凸出挡 钩 （111 ), 其特征在于： 永磁体 (2) 至少一个外侧表面设置轴向凹口 （21 ), 导磁块（ 11 )至少一个外侧表面设置轴向凸起 ( 112 ), 永磁体（ 2 )安装在径向 凹槽（110)里面， 导磁块（11 ) 的轴向凸起 (112)镶嵌在永磁体 (2) 的轴向 凹口 （ 21 )里面；
或者永磁体 ( 2 )至少一个外侧表面设置轴向凸起 ( 22 ), 导磁块（ 11 )至 少一个外侧表面设置轴向凹口 （113), 永磁体 (2)安装在径向凹槽（110)里 面， 永磁体（2) 的轴向凸起 (22)镶嵌在导磁块（11 ) 的轴向凹口 （113)里 面。
2、 根据权利要求 1所述的一种永磁转子结构， 其特征在于： 转子铁芯 （1 ) 包括设置有中心轴孔（U0) 的内铁芯 （U)和设置在内铁芯（U)外围的若干 块导磁块（ 11 )。
3、根据权利要求 1所述的一种永磁转子结构， 其特征在于： 轴向凹口 （21 ) 贯穿永磁体（ 2 ) 的外侧表面， 轴向凸起（ 112 )贯穿导磁块（ 11 ) 的外侧表面。
4、 根据权利要求 1或 3所述的一种永磁转子结构， 其特征在于： 从端部上 看， 所有轴向 口 1 )和轴向凸起（22)周向均匀排布。
5、 根据权利要求 2所述的一种永磁转子结构， 其特征在于： 内铁芯 （12) 和导磁块（ 11 )通过中间的绝缘层（ 3 )连接在一起。
6、 根据权利要求 5所述的一种永磁转子结构， 其特征在于： 所述的绝缘层 ( 3 )包括前端面板（ 31 )、后端面板（ 32 )和中间连接柱（ 33 ), 中间连接柱 ( 33 ) 两端分别连接前端面板（ 31 )、 后端面板（ 32 )。
7、 根据权利要求 6所述的一种永磁转子结构， 其特征在于： 导磁块（11 ) 上设置轴向开口槽（114), 中间连接柱（33)外侧凸出若干加强筋 （331 ), 加 强筋 （331 )伸入到轴向开口槽（114) 里面。
8、根据权利要求 6或 7所述的一种永磁转子结构，其特征在于：内铁芯（ 12 ) 外侧表面设置若干卡槽（ 121 ), 中间连接柱 ( 33 )内侧表面凸出若干卡块（ 332 ), 中间连接柱 ( 33)嵌套在内铁芯 （U)外面， 卡块（332 )镶嵌在卡槽（U1 ) 里面。
PCT/CN2013/085790 2013-08-30 2013-10-23 一种永磁转子结构 WO2015027556A1 (zh)

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