WO2016101454A1 - 一种永磁转子及其应用的直流无刷电机 - Google Patents

一种永磁转子及其应用的直流无刷电机 Download PDF

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Publication number
WO2016101454A1
WO2016101454A1 PCT/CN2015/077131 CN2015077131W WO2016101454A1 WO 2016101454 A1 WO2016101454 A1 WO 2016101454A1 CN 2015077131 W CN2015077131 W CN 2015077131W WO 2016101454 A1 WO2016101454 A1 WO 2016101454A1
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permanent magnet
rotor core
coupling member
rotor
outer rotor
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PCT/CN2015/077131
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English (en)
French (fr)
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唐松发
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中山大洋电机制造有限公司
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Publication of WO2016101454A1 publication Critical patent/WO2016101454A1/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

Definitions

  • the utility model relates to a permanent magnet rotor and a DC brushless motor thereof.
  • the inner rotor core of the existing permanent magnet rotor is mounted on the rotating shaft by injection molding, and a plurality of outer rotor cores are installed at intervals on the outer peripheral edge of the inner rotor core, and a mounting groove is formed between two adjacent outer rotor cores.
  • the permanent magnets are nested inside the installation slot, but the permanent magnet rotor has low structural strength, is easy to loose during the high-speed operation of the motor, and has low reliability, and the magnetic flux leakage phenomenon of the permanent magnet rotor makes the permanent magnet rotor The operating efficiency is reduced.
  • the utility model aims to provide a permanent magnet rotor and a DC brushless motor thereof, which has the advantages of simple structure, large structural strength, reliable operation, and can greatly reduce the leakage magnetic phenomenon of the rotor and improve the performance of the rotor. ;
  • the DC brushless motor has a simple structure, wherein the rotor has a simple structure, large structural strength, reliable operation, and can greatly reduce the leakage magnetic phenomenon of the rotor and improve the performance of the rotor.
  • a permanent magnet rotor includes an inner rotor core, a plurality of outer rotor cores and permanent magnets, a shaft hole is formed in the middle of the inner rotor core, and further includes a coupling part and a plastic sealing body, and the coupling component is set outside the inner rotor core a plurality of card slots are circumferentially opened on the outer peripheral edge of the coupling member, and the inner end of the outer rotor core is provided with a block, and a plurality of outer rotor cores are circumferentially mounted on the outer peripheral edge of the coupling member, and the block is nested Inside the card slot, a mounting groove is formed between two adjacent outer rotor cores, and the permanent magnet is nested inside the mounting groove, and the plastic sealing body connects the inner rotor core, the coupling part, the outer rotor core and the permanent magnet into one body. .
  • the axial height of the inner rotor core described above is smaller than the axial height of the outer rotor core.
  • the axial height of the coupling member described above is smaller than the axial height of the inner rotor core, and an annular groove portion is formed between the end portion of the coupling member, the outer rotor core and the inner rotor core, and some of the molding body is nested in the ring shape. Inside the groove.
  • the above-mentioned outer wall of the inner rotor core protrudes circumferentially outwardly from a plurality of projections, and a plurality of grooves are circumferentially disposed on the inner wall of the coupling member, and the projections are nested inside the grooves.
  • the above-mentioned outer rotor core is provided with a through hole penetrating in the axial direction, and a part of the plastic sealing body passes through the middle of the through hole, and a hook is protruded from the opening portion of the mounting groove and the outer rotor core on both sides.
  • a part of the plastic body is filled in the opening between the adjacent two hooks, and the plastic body encloses the outer end surface of the permanent magnet.
  • the above-mentioned two sides are provided with chamfers on both sides of the inner end of the permanent magnet, and a gap is formed between the block at the inner end of the outer rotor core and the chamfer of the inner end of the permanent magnet, and some of the molded body is filled in the gap. .
  • the molded body described above is wrapped around the outer end portions of the inner rotor core, the outer rotor core, the permanent magnet, and the coupling member, and the circumferential surface portion of the outer rotor core is exposed.
  • the plastic sealed casing described above is wrapped by the inner rotor core, the coupling member, the outer rotor cores and the permanent magnets and formed integrally by injection molding.
  • the coupling member described above is formed by laminating a plurality of silicon steel sheets or aluminum sheets.
  • a DC brushless motor comprising a rotating shaft, a permanent magnet rotor, a stator assembly and a casing assembly, the permanent magnet rotor is mounted on the rotating shaft, the stator assembly and the outer casing assembly are mounted together and nested outside the permanent magnet rotor, and the two ends of the rotating shaft are supported at On the bearing of the outer casing assembly, the permanent magnet rotor comprises an inner rotor core, a plurality of outer rotor cores and a permanent magnet, and a shaft hole is opened in the middle of the inner rotor core, and further comprises a coupling part and a molding body, and the coupling part set Outside the inner rotor core, a plurality of card slots are circumferentially opened on the outer peripheral edge of the coupling member, and the inner end of the outer rotor core is provided with a block, and the outer rotor cores are circumferentially mounted on the outer peripheral edge of the coupling member.
  • the block is nested inside the card slot, and a mounting groove is formed between two adjacent outer rotor cores, and the permanent magnet is nested inside the mounting groove, and the plastic sealing body connects the inner rotor core, the coupling part, and several outer rotor cores It is integrated with the permanent magnet.
  • the coupling component is sleeved outside the inner rotor core, and a plurality of card slots are circumferentially opened on the outer peripheral edge of the coupling component, and the inner end of the outer rotor core is provided with a block, and the outer rotor cores are circumferentially mounted at On the outer peripheral edge of the coupling member, the block is nested inside the card slot, and a mounting groove is formed between two adjacent outer rotor cores, and the permanent magnet is nested inside the mounting groove, and the plastic sealing body connects the inner rotor core, the coupling component, a few outside
  • the rotor core and the permanent magnet are integrally connected, the structure is simple, the structure strength is large, the work is reliable, and the leakage magnetic phenomenon of the rotor can be greatly reduced, and the performance of the rotor is improved;
  • a retaining hook protrudes from the opening of the mounting groove and the outer rotor core on both sides, and some of the plastic sealing body is filled in the opening between the adjacent two hooks, the structure is simple, and the structure of the permanent magnet rotor is effectively increased. Strength, while preventing radial movement of permanent magnets;
  • a gap is formed between the inner end of the outer rotor core and the chamfer of the inner end of the permanent magnet, and some of the plastic body is filled in the gap, thereby effectively improving the structural strength of the permanent magnet rotor and reducing the permanent magnet Magnetic leakage phenomenon ensures the high performance of the permanent magnet rotor;
  • the plastic package is wrapped by the outer end of the inner rotor core, the outer rotor core, the permanent magnet and the coupling part, and the outer surface of the outer rotor core is exposed, and the production process is simple under the premise of ensuring product performance. Effectively improve production efficiency and reduce cost.
  • Figure 1 is a perspective view of a permanent magnet rotor in an embodiment
  • Figure 2 is a plan view of the permanent magnet rotor in the embodiment
  • Figure 3 is a cross-sectional view taken along line A-A of Figure 2;
  • Figure 4 is a cross-sectional view taken along line B-B of Figure 3;
  • Figure 5 is a partial enlarged view of C-C in Figure 4.
  • Figure 6 is an exploded view of the permanent magnet rotor in which the molded body is not attached in the embodiment
  • Figure 7 is a perspective view of a DC brushless motor in the embodiment
  • Figure 8 is a cross-sectional view showing the structure of a brushless DC motor in the embodiment.
  • Embodiment 1 As shown in FIG. 1 , FIG. 2 , FIG. 3 , FIG. 4 , FIG. 5 and FIG. 6 , the embodiment is a permanent magnet rotor including an inner rotor core 1 , a plurality of outer rotor cores 2 and a permanent
  • the magnet 3 is provided with a shaft hole 11 in the middle of the inner rotor core 1, and further includes a coupling member 4 and a molding body 5 which are fitted outside the inner rotor core 1 and circumferentially opened on the outer peripheral edge of the coupling member 4.
  • the inner end of the outer rotor core 2 is provided with a block 21, and a plurality of outer rotor cores 2 are circumferentially mounted on the outer peripheral edge of the coupling member 4, and the block 21 is nested inside the card slot 41.
  • a mounting groove 22 is formed between two adjacent outer rotor cores 2, and the permanent magnet 3 is nested inside the mounting groove 22.
  • the plastic sealing body 5 has an inner rotor core 1, a coupling member 4, a plurality of outer rotor cores 2, and a permanent The magnets 3 are joined together.
  • the axial height L1 of the inner rotor core 1 is smaller than the axial height L2 of the outer rotor core 2.
  • the axial height L3 of the coupling member 4 is smaller than the axial height L1 of the inner rotor core 1, and an annular groove portion 6 is formed between the end portion of the coupling member 4, the outer rotor core 2 and the inner rotor core 1, and a partial molded body 5 is nested inside the annular groove portion 6.
  • a plurality of projections 12 project circumferentially outward on the outer wall of the inner rotor core 1, and a plurality of grooves 42 are circumferentially provided on the inner wall of the coupling member 4, and the projections 12 are nested inside the grooves 42.
  • a through hole 23 penetrating in the axial direction is formed in the outer rotor core 2, and a part of the molding body 5 passes through the middle of the through hole 23, and is protruded from the opening portion of the mounting groove 22 and the outer rotor core 2 on both sides.
  • the hook 24 is partially filled with an opening portion between the adjacent two stopper hooks 24, and the molded body 5 surrounds the outer end surface of the permanent magnet 3.
  • a chamfer 31 is provided on both sides of the inner end of the permanent magnet 3, and a gap 7 is formed between the block 21 at the inner end of the outer rotor core 2 and the chamfer 31 of the inner end of the permanent magnet 3, and the partial molded body 5 is formed. Filled in the gap 7.
  • the molded body 5 is wrapped around the outer end portions of the inner rotor core 1, the outer rotor core 2, the permanent magnet 3, and the coupling member 4, and the circumferential surface portion of the outer rotor core 2 is exposed.
  • the molded casing 5 is wrapped by the outer rotor core 1, the coupling member 4, the outer rotor cores 2, and the permanent magnets 3 by injection molding and formed integrally.
  • the coupling member 4 is formed by laminating a plurality of silicon steel sheets or aluminum sheets.
  • Embodiment 2 As shown in FIG. 1 to FIG. 8 , the embodiment is a DC brushless motor including a rotating shaft 81 , a permanent magnet rotor 82 , a stator assembly 83 and a casing assembly.
  • the casing assembly includes a casing 84 .
  • the permanent magnet rotor 82 Before The end cap 85 and the rear end cap 86, the permanent magnet rotor 82 is mounted on the rotating shaft 81, the stator assembly 83 and the casing 84 are mounted together and nested outside the permanent magnet rotor 82, and the front end cover 85 and the rear end cover 86 are respectively mounted on At both ends of the casing 84, both ends of the rotating shaft 81 are supported on the bearings of the front end cover 85 and the rear end cover 86, respectively, and the front end portion of the rotating shaft 81 projects from the middle of the front end cover 85, and the motor controller 87 is mounted on the rear end cover 86.
  • the permanent magnet rotor 82 includes an inner rotor core 1, a plurality of outer rotor cores 2, and permanent magnets 3.
  • a shaft hole 11 is defined in the middle of the inner rotor core 1, and further includes a coupling member 4 and a molding body 5, and the coupling member 4
  • a plurality of card slots 41 are circumferentially opened on the outer peripheral edge of the coupling member 4, and the inner end of the outer rotor core 2 is provided with a block 21, and a plurality of outer rotor cores 2 are circumferentially disposed.
  • the inner rotor core 1, the coupling member 4, the plurality of outer rotor cores 2, and the permanent magnets 3 are integrally connected.

Abstract

一种永磁转子，包括内转子铁芯（1）、若干外转子铁芯（2）、永磁体（3）、联接部件（4）和塑封体（5），在内转子铁芯（1）中间开设有轴孔（11），联接部件（4）套装在内转子铁芯（1）外面，其外周边缘上周向开设有若干卡槽（41），外转子铁芯（2）的内侧端部上设置有卡块（21），卡块（21）嵌套在卡槽（41）里面，若干外转子铁芯（2）周向安装在联接部件（4）的外周边缘上，相邻两个外转子铁芯（2）之间形成容纳永磁体（3）的安装槽（22），塑封体（5）把内转子铁芯（1）、联接部件（4）、若干外转子铁芯（2）和永磁体（3）连结成一体。永磁转子结构简单、结构强度大、能极大地减小转子的漏磁现象，提高转子性能。

Description

一种永磁转子及其应用的直流无刷电机 技术领域：
本实用新型涉及一种永磁转子及其应用的直流无刷电机。
背景技术：
现有的永磁转子的内转子铁芯通过注塑安装在转轴上，若干外转子铁芯间隔的安装在内转子铁芯的外周边缘上，相邻两个外转子铁芯之间形成安装槽，永磁体嵌套安装在安装槽里面，但是这种永磁转子的结构强度低，在电机高速运转的过程中容易松脱，可靠性较低，同时永磁转子存在漏磁现象，使得永磁转子的运行效率降低。
发明内容：
本实用新型的目的是提供一种永磁转子及其应用的直流无刷电机，该永磁转子结构简单，结构强度大，工作可靠，并且能极大地减小转子的漏磁现象，提高转子性能；
该直流无刷电机结构简单，其中转子的结构简单，结构强度大，工作可靠，并且能极大地减小转子的漏磁现象，提高转子性能。
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，包括内转子铁芯、若干外转子铁芯和永磁体，在内转子铁芯中间开设有轴孔，还包括有联接部件和塑封体，联接部件套装在内转子铁芯外面，在联接部件的外周边缘上周向开设有若干卡槽，外转子铁芯的内侧端部上设置有卡块，若干外转子铁芯周向安装在联接部件的外周边缘上，卡块嵌套在卡槽里面，相邻两个外转子铁芯之间形成安装槽，永磁体嵌套在安装槽里面，塑封体把内转子铁芯、联接部件、若干外转子铁芯和永磁体连结成一体。
上述所述的内转子铁芯的轴向高度小于外转子铁芯的轴向高度。
上述所述的联接部件的轴向高度小于内转子铁芯的轴向高度，在联接部件的端部、外转子铁芯和内转子铁芯之间形成环形槽部，部分塑封体嵌套在环形槽部里面。
上述所述的在内转子铁芯的外壁上周向往外伸出若干凸块，在联接部件的内壁上周向设置有若干凹槽，凸块嵌套在凹槽里面。
上述所述的在外转子铁芯上开设有沿轴向贯穿的通孔，部分塑封体从通孔中间穿过，在安装槽的开口部、两侧的外转子铁芯上凸出有挡钩，部分塑封体填充在相邻两挡钩之间的开口部里面，塑封体包裹着永磁体的外侧端面。
上述所述的在永磁体的内侧端部两侧设置有倒角，在外转子铁芯内侧端部的卡块与永磁体内侧端部的倒角之间形成有间隙，部分塑封体填充在间隙里面。
上述所述的塑封体包裹在内转子铁芯、外转子铁芯、永磁体和联接部件的两端部外面，外转子铁芯的圆周面部分外露。
上述所述的塑封外壳是通过注塑包裹在内转子铁芯、联接部件、若干外转子铁芯和永磁体外面并形成一个整体。
上述所述的联接部件是由若干硅钢板或者铝板叠压而成的。
一种直流无刷电机，包括转轴、永磁转子、定子组件和外壳组件，永磁转子安装在转轴上，定子组件和外壳组件安装在一起并嵌套在永磁转子外面，转轴两端支承在外壳组件的轴承上，所述的永磁转子包括内转子铁芯、若干外转子铁芯和永磁体，在内转子铁芯中间开设有轴孔，还包括有联接部件和塑封体，联接部件套装在内转子铁芯外面，在联接部件的外周边缘上周向开设有若干卡槽，外转子铁芯的内侧端部上设置有卡块，若干外转子铁芯周向安装在联接部件的外周边缘上，卡块嵌套在卡槽里面，相邻两个外转子铁芯之间形成安装槽，永磁体嵌套在安装槽里面，塑封体把内转子铁芯、联接部件、若干外转子铁芯和永磁体连结成一体。
本实用新型与现有技术相比，具有如下效果：
1)联接部件套装在内转子铁芯外面，在联接部件的外周边缘上周向开设有若干卡槽，外转子铁芯的内侧端部上设置有卡块，若干外转子铁芯周向安装在联接部件的外周边缘上，卡块嵌套在卡槽里面，相邻两个外转子铁芯之间形成安装槽，永磁体嵌套在安装槽里面，塑封体把内转子铁芯、联接部件、若干外 转子铁芯和永磁体连结成一体，结构简单，结构强度大，工作可靠，并且能极大地减小转子的漏磁现象，提高转子性能；
2)在联接部件的端部、外转子铁芯和内转子铁芯之间形成环形槽部，部分塑封体嵌套在环形槽部里面，结构简单，有效增加塑封外壳与内转子铁芯、联接部件和外转子铁芯之间的结构强度，提高转子的整体性能；
3)在内转子铁芯的外壁上周向往外伸出若干凸块，在联接部件的内壁上周向设置有若干凹槽，凸块嵌套在凹槽里面，结构简单，增加内转子铁芯与联接部件之间的结合力，从而提高永磁转子的整体强度；
4)在安装槽的开口部、两侧的外转子铁芯上凸出有挡钩，部分塑封体填充在相邻两挡钩之间的开口部里面，结构简单，有效增加永磁转子的结构强度，同时可以防止永磁体的径向移动；
5)在外转子铁芯内侧端部的卡块与永磁体内侧端部的倒角之间形成有间隙，部分塑封体填充在间隙里面，有效提高永磁转子的结构强度，同时减小永磁体的漏磁现象，保证了永磁转子的高性能；
6)塑封外壳是通过注塑包裹在内转子铁芯、外转子铁芯、永磁体和联接部件的两端部外面，外转子铁芯的圆周面部分外露，在保证产品性能前提下，生产工艺简单，有效提高生产效率，降低成本成本。
附图说明：
图1是实施例中永磁转子的立体图；
图2是实施例中永磁转子的俯视图；
图3是图2中A-A剖视图；
图4是图3中B-B剖视图；
图5是图4中C-C局部放大图；
图6是实施例中没有安装塑封体的永磁转子的分解图；
图7是实施例中直流无刷电机的立体图；
图8是实施例中直流无刷电机的结构剖视图。
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1、图2、图3、图4、图5和图6所示，本实施例是一种永磁转子，包括内转子铁芯1、若干外转子铁芯2和永磁体3，在内转子铁芯1中间开设有轴孔11，还包括有联接部件4和塑封体5，联接部件4套装在内转子铁芯1外面，在联接部件4的外周边缘上周向开设有若干卡槽41，外转子铁芯2的内侧端部上设置有卡块21，若干外转子铁芯2周向安装在联接部件4的外周边缘上，卡块21嵌套在卡槽41里面，相邻两个外转子铁芯2之间形成安装槽22，永磁体3嵌套在安装槽22里面，塑封体5把内转子铁芯1、联接部件4、若干外转子铁芯2和永磁体3连结成一体。内转子铁芯1的轴向高度L1小于外转子铁芯2的轴向高度L2。联接部件4的轴向高度L3小于内转子铁芯1的轴向高度L1，在联接部件4的端部、外转子铁芯2和内转子铁芯1之间形成环形槽部6，部分塑封体5嵌套在环形槽部6里面。在内转子铁芯1的外壁上周向往外伸出若干凸块12，在联接部件4的内壁上周向设置有若干凹槽42，凸块12嵌套在凹槽42里面。在外转子铁芯2上开设有沿轴向贯穿的通孔23，部分塑封体5从通孔23中间穿过，在安装槽22的开口部、两侧的外转子铁芯2上凸出有挡钩24，部分塑封体5填充在相邻两挡钩24之间的开口部里面，塑封体5包裹着永磁体3的外侧端面。在永磁体3的内侧端部两侧设置有倒角31，在外转子铁芯2内侧端部的卡块21与永磁体3内侧端部的倒角31之间形成有间隙7，部分塑封体5填充在间隙7里面。塑封体5包裹在内转子铁芯1、外转子铁芯2、永磁体3和联接部件4的两端部外面，外转子铁芯2的圆周面部分外露。塑封外壳5是通过注塑包裹在内转子铁芯1、联接部件4、若干外转子铁芯2和永磁体3外面并形成一个整体。所述的联接部件4是由若干硅钢板或者铝板叠压而成的。
实施例二：如图1至图8所示，本实施例是一种直流无刷电机，包括转轴81、永磁转子82、定子组件83和外壳组件，所述的外壳组件包括机壳84、前 端盖85和后端盖86，永磁转子82安装在转轴81上，定子组件83和机壳84安装在一起并嵌套在永磁转子82外面，前端盖85和后端盖86分别安装在机壳84两端，转轴81两端分别支承在前端盖85和后端盖86的轴承上并且转轴81的前端部从前端盖85中间伸出，在后端盖86上安装有电机控制器87，永磁转子82包括内转子铁芯1、若干外转子铁芯2和永磁体3，在内转子铁芯1中间开设有轴孔11，还包括有联接部件4和塑封体5，联接部件4套装在内转子铁芯1外面，在联接部件4的外周边缘上周向开设有若干卡槽41，外转子铁芯2的内侧端部上设置有卡块21，若干外转子铁芯2周向安装在联接部件4的外周边缘上，卡块21嵌套在卡槽41里面，相邻两个外转子铁芯2之间形成安装槽22，永磁体3嵌套在安装槽22里面，塑封体5把内转子铁芯1、联接部件4、若干外转子铁芯2和永磁体3连结成一体。
以上实施例为本发明的较佳实施方式，但本发明的实施方式不限于此，其他任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化，均为等效的置换方式，都包含在本发明的保护范围之内。

Claims (10)

  1. 一种永磁转子，包括内转子铁芯(1)、若干外转子铁芯(2)和永磁体(3)，在内转子铁芯(1)中间开设有轴孔(11)，其特征在于：还包括有联接部件(4)和塑封体(5)，联接部件(4)套装在内转子铁芯(1)外面，在联接部件(4)的外周边缘上周向开设有若干卡槽(41)，外转子铁芯(2)的内侧端部上设置有卡块(21)，若干外转子铁芯(2)周向安装在联接部件(4)的外周边缘上，卡块(21)嵌套在卡槽(41)里面，相邻两个外转子铁芯(2)之间形成安装槽(22)，永磁体(3)嵌套在安装槽(22)里面，塑封体(5)把内转子铁芯(1)、联接部件(4)、若干外转子铁芯(2)和永磁体(3)连结成一体。
  2. 根据权利要求1所述的一种永磁转子，其特征在于：内转子铁芯(1)的轴向高度L1小于外转子铁芯(2)的轴向高度L2。
  3. 根据权利要求2所述的一种永磁转子，其特征在于：联接部件(4)的轴向高度L3小于内转子铁芯(1)的轴向高度L1，在联接部件(4)的端部、外转子铁芯(2)和内转子铁芯(1)之间形成环形槽部(6)，部分塑封体(5)嵌套在环形槽部(6)里面。
  4. 根据权利要求1或2或3所述的一种永磁转子，其特征在于：在内转子铁芯(1)的外壁上周向往外伸出若干凸块(12)，在联接部件(4)的内壁上周向设置有若干凹槽(42)，凸块(12)嵌套在凹槽(42)里面。
  5. 根据权利要求4所述的一种永磁转子，其特征在于：在外转子铁芯(2)上开设有沿轴向贯穿的通孔(23)，部分塑封体(5)从通孔(23)中间穿过，在安装槽(22)的开口部、两侧的外转子铁芯(2)上凸出有挡钩(24)，部分塑封体(5)填充在相邻两挡钩(24)之间的开口部里面，塑封体(5)包裹着永磁体(3)的外侧端面。
  6. 根据权利要求4所述的一种永磁转子，其特征在于：在永磁体(3)的内侧端部两侧设置有倒角(31)，在外转子铁芯(2)内侧端部的卡块(21)与永磁体(3)内侧端部的倒角(31)之间形成有间隙(7)，部分塑封体(5)填充 在间隙(7)里面。
  7. 根据权利要求1或2或3所述的一种永磁转子，其特征在于：所述的塑封体(5)包裹在内转子铁芯(1)、外转子铁芯(2)、永磁体(3)和联接部件(4)的两端部外面，外转子铁芯(2)的圆周面部分外露。
  8. 根据权利要求1或2或3所述的一种永磁转子，其特征在于：所述的塑封外壳(5)是通过注塑包裹在内转子铁芯(1)、联接部件(4)、若干外转子铁芯(2)和永磁体(3)外面并形成一个整体。
  9. 根据权利要求1或2或3所述的一种永磁转子，其特征在于：所述的联接部件(4)是由若干硅钢板或者铝板叠压而成的。
  10. 一种直流无刷电机，包括转轴(81)、永磁转子(82)、定子组件(83)和外壳组件，永磁转子(82)安装在转轴(81)上，定子组件(83)和外壳组件安装在一起并嵌套在永磁转子(82)外面，转轴(81)两端支承在外壳组件的轴承上，其特征在于：所述的永磁转子是权利要求1至9任一项所描述的永磁转子。
PCT/CN2015/077131 2014-12-26 2015-04-21 一种永磁转子及其应用的直流无刷电机 WO2016101454A1 (zh)

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