CN102904404A - A Coreless Axial Field Brushless DC Motor Based on Halbach Structure - Google Patents

A Coreless Axial Field Brushless DC Motor Based on Halbach Structure Download PDF

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CN102904404A
CN102904404A CN2012102868293A CN201210286829A CN102904404A CN 102904404 A CN102904404 A CN 102904404A CN 2012102868293 A CN2012102868293 A CN 2012102868293A CN 201210286829 A CN201210286829 A CN 201210286829A CN 102904404 A CN102904404 A CN 102904404A
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rotor
permanent magnet
halbach
coreless
disc
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黄允凯
曹永娟
金龙
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Southeast University
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Abstract

The invention discloses a Halbach-structure-based iron-core-free axial magnetic field brushless direct-current electromotor which comprises a stator iron-core-free armature disc, a permanent magnet, a rotor disc, a shaft, a bearing and a rotor outer shell, wherein two symmetrical rotor discs are arranged at two sides of the stator iron-core-free armature disc; the stator iron-core-free armature disc and the rotor disc are installed on the shaft; the shaft is installed in the rotor outer shell through the bearing; the permanent magnet is pasted on the rotor disc, and is pasted on the inner surface of the rotor outer shell; a Halbach magnet structure with axial magnetizing and tangential magnetizing is adopted for the permanent magnet, and an enclosed magnetic circuit is formed automatically; and a soft magnetic material is placed at the middle of the permanent magnet with tangential magnetizing. According to the invention, on the basis that more permanent magnets are not used, flux density with great air clearance can be obtained, and are is in sine distribution; the output torque is high; the torque density is large; the efficiency is high; the structure is simple; the assembly is simple; and the Halbach-structure-based iron-core-free axial magnetic field brushless direct-current electromotor is suitable for relevant driving occasions with compact structures for electric automobile hub motors and the like.

Description

一种基于Halbach结构的无铁心轴向磁场无刷直流电动机A Coreless Axial Field Brushless DC Motor Based on Halbach Structure

技术领域 technical field

本发明涉及电动机技术领域,具体涉及一种基于Halbach结构的无铁心轴向磁场无刷直流电动机。 The invention relates to the technical field of motors, in particular to a coreless axial magnetic field brushless DC motor based on a Halbach structure.

背景技术 Background technique

环境污染和能源短缺是当今世界的重要问题,事关人类生存环境的改善。伴随着汽车社会的急速发展,城市范围内的大气污染问题以及全球范围内的二氧化碳排放等环境问题以及全球范围内的二氧化碳排放等环境问题已经引起人们的广泛关注。为了解决上述问题,研究开发节能、环保和安全的汽车是实现可持续发展的必由之路。其中,电动汽车以其低公害性、高燃油经济性、高效化以及对于行驶的灵活性等方面的优势备受重视。在电动汽车领域中,采用轮毂电机直接驱动系统结构型式日益成为发展方向,轮毂电机逐步成为电动汽车领域的研究热点。与传统的单电机集中驱动的电动汽车结构不同,直接驱动就是将电动机直接安装在车轮内,每个轮内装有一个电机,称为轮毂电机,直接驱动车轮带动汽车行驶。这种结构的主要优点是取消了齿轮箱和机械差动器,减小了驱动链的组件,因而减小了整个驱动链的重量,提高整个系统的可靠性和效率。然而,由于取消了齿轮,驱动轮轴的转矩都要由电动机来产生,电机的体积和重量会增加。因此直驱系统主要的挑战是要使安装在轮内的轮毂电机的体积和重量尽量的小,应在电机的体积、重量和功率之间进行平衡。 Environmental pollution and energy shortage are important issues in today's world, which are related to the improvement of human living environment. With the rapid development of the automobile society, environmental problems such as air pollution within cities and global carbon dioxide emissions have attracted widespread attention. In order to solve the above problems, research and development of energy-saving, environment-friendly and safe vehicles is the only way to achieve sustainable development. Among them, electric vehicles have attracted much attention due to their advantages in low pollution, high fuel economy, high efficiency, and flexibility in driving. In the field of electric vehicles, the structure of direct drive system using in-wheel motors has increasingly become a development direction, and in-wheel motors have gradually become a research hotspot in the field of electric vehicles. Different from the structure of the traditional single-motor centralized drive electric vehicle, the direct drive means that the motor is directly installed in the wheel, and each wheel is equipped with a motor, called a hub motor, which directly drives the wheel to drive the car. The main advantage of this structure is that the gearbox and mechanical differential are eliminated, and the components of the drive chain are reduced, thereby reducing the weight of the entire drive chain and improving the reliability and efficiency of the entire system. However, since the gear is eliminated, the torque for driving the wheel shaft must be generated by the electric motor, and the volume and weight of the electric motor will increase. Therefore, the main challenge of the direct drive system is to make the volume and weight of the hub motor installed in the wheel as small as possible, and a balance should be made between the volume, weight and power of the motor.

鉴于轮毂电机本身的特点与要求,轴向磁场无铁心永磁同步电动机是一个很好的选择。现有技术中也有轴向磁场无铁心永磁同步电动机,其能够减小电机质量,消除齿槽转矩和铁心损耗,但是其定子采用无铁心以后,由于有效气隙变大,气隙磁密不高,从而引起电机的转矩密度比较低。 In view of the characteristics and requirements of the hub motor itself, the axial magnetic field coreless permanent magnet synchronous motor is a good choice. In the prior art, there is also an axial magnetic coreless permanent magnet synchronous motor, which can reduce the mass of the motor, eliminate cogging torque and core loss, but after the stator adopts an ironless core, the effective air gap becomes larger, and the air gap flux density Not high, resulting in a relatively low torque density of the motor.

为了提高气隙磁密,采用Halbach型阵列永磁体的永磁电机正在逐渐被应用。现有的基于Halbach结构的轴向磁场无铁心永磁电机,为了获得正弦分布的气隙磁密,Halbach阵列永磁体充磁方向必须多样,这样势必提高了永磁体的制造成本,从而增加整个电机的成本,降低了性价比。 In order to improve the air gap flux density, permanent magnet motors using Halbach type array permanent magnets are gradually being applied. In the existing axial magnetic coreless permanent magnet motor based on the Halbach structure, in order to obtain a sinusoidally distributed air gap flux density, the magnetization directions of the Halbach array permanent magnets must be varied, which will inevitably increase the manufacturing cost of the permanent magnets, thereby increasing the overall motor capacity. cost, reducing the cost performance.

发明内容 Contents of the invention

本发明为了克服现有技术的不足,提供一种永磁体用量少、成本低、重量轻、无铁耗、效率高,且气隙磁密大大增加、波形正弦分布的Halbach磁体结构的轴向磁场无铁心永磁无刷直流电动机。 In order to overcome the deficiencies in the prior art, the present invention provides a Halbach magnet structure with less permanent magnet consumption, low cost, light weight, no iron loss, high efficiency, greatly increased air gap magnetic density, and sinusoidal distribution of the axial direction of the Halbach magnet structure. Field Ironless Permanent Magnet Brushless DC Motor.

本发明采用的技术方案为:一种基于Halbach结构的无铁心轴向磁场无刷直流电动机,包括定子无铁心电枢盘、永磁体、转子盘、轴、轴承和转子外壳; The technical solution adopted by the present invention is: a coreless axial magnetic field brushless DC motor based on Halbach structure, including a stator coreless armature disc, a permanent magnet, a rotor disc, a shaft, a bearing and a rotor housing;

所述定子无铁心电枢盘的两侧设有两个对称转子盘,定子无铁心电枢盘和转子盘安装在轴上,轴通过轴承安装在转子外壳内,所述转子盘上粘贴有永磁体,永磁体粘贴在转子外壳的内表面; There are two symmetrical rotor disks on both sides of the stator coreless armature disk, the stator coreless armature disk and the rotor disk are installed on the shaft, the shaft is installed in the rotor shell through the bearing, and the permanent rotor disk is pasted on the rotor disk. Magnet, the permanent magnet is pasted on the inner surface of the rotor shell;

所述永磁体采用轴向充磁与切向充磁的Halbach磁体结构,可自行形成闭合磁路,省去了转子背铁,减轻转子重量,所述切向充磁的永磁体中间放置软磁材料,在保证能产生正弦分布的气隙磁密,不减弱气隙磁密的前提下,可减少永磁体用量,降低电机制造成本,每一个转子盘上每一磁极由四部分构成:轴向充磁的永磁体,软磁材料和两块切向充磁的永磁体。 The permanent magnet adopts the Halbach magnet structure of axial magnetization and tangential magnetization, which can form a closed magnetic circuit by itself, saves the rotor back iron, and reduces the weight of the rotor. The tangentially magnetized permanent magnet is placed in the middle of a soft magnetic The material can reduce the amount of permanent magnets and reduce the manufacturing cost of the motor under the premise of ensuring that the air-gap flux density with sinusoidal distribution can be produced without weakening the air-gap flux density. Each magnetic pole on each rotor disc is composed of four parts: axial A magnetized permanent magnet, a soft magnetic material and two tangentially magnetized permanent magnets.

作为优选,所述定子无铁心电枢盘采用非重叠集中绕组型式,绕组端接部分更短,用量少,铜耗少,而且该种绕组型式构造简单,加工方便。 As a preference, the coreless armature disk of the stator adopts a non-overlapping concentrated winding type, the winding terminal part is shorter, the consumption is less, and the copper consumption is less, and the structure of this winding type is simple, and the processing is convenient.

作为优选,所述转子外壳由高机械强度的非磁性材料所构成。 Preferably, the rotor shell is made of non-magnetic material with high mechanical strength.

作为优选,所述永磁体选用高磁能积的钕铁硼材料。 Preferably, the permanent magnet is made of NdFeB material with high magnetic energy product.

本发明定子采用无铁心结构,可消除齿槽转矩和铁心损耗,消除定转子之间的轴向磁力,装配方便。通过选择合适的转子永磁材料、软磁材料尺寸以及合适的安放位置,可产生正弦分布的磁场波形,削弱谐波分量。 The stator of the invention adopts an iron-coreless structure, which can eliminate the cogging torque and core loss, eliminate the axial magnetic force between the stator and the rotor, and facilitate assembly. By selecting the appropriate rotor permanent magnet material, the size of the soft magnetic material, and the appropriate placement position, a sinusoidally distributed magnetic field waveform can be generated to weaken the harmonic component.

本发明提出的一种Halbach磁体结构的轴向磁场无铁心无刷直流电动机,该电机是对现有Halbach结构永磁电机的改进,Halbach永磁体阵列仅采用轴向充磁和切向充磁两个方向的磁体,在两块切向充磁的磁体中间加入软磁材料,在保证气隙磁密大小一定的基础上,减少永磁体用量,降低电机造价,减轻转子重量,从而提高电机的转矩密度。通过选择合适的永磁材料、软磁材料尺寸及它们的安放位置,还可提高气隙磁密的正弦性,削弱谐波分量。 The present invention proposes an axial magnetic field coreless brushless DC motor with a Halbach magnet structure. The motor is an improvement to the existing Halbach structure permanent magnet motor. The Halbach permanent magnet array only adopts two methods of axial magnetization and tangential magnetization. For magnets in two directions, soft magnetic materials are added between two tangentially magnetized magnets. On the basis of ensuring a certain air gap flux density, the amount of permanent magnets is reduced, the cost of the motor is reduced, and the weight of the rotor is reduced, thereby improving the rotation of the motor. moment density. By selecting the appropriate permanent magnet material, soft magnetic material size and their placement position, the sine of the air gap magnetic density can be improved and the harmonic component can be weakened.

本发明的有益效果: 1)定子盘采用无铁心结构,消除了齿槽转矩与铁心损耗,提高了电机效率,减轻了电机质量;2)磁钢盘采用轴向与切向相结合的Halbach永磁体阵列,省去了转子背铁,减轻了转子质量,也提高了气隙磁密,从而提高了电机输出转矩,转矩密度增大;3)在相邻两块切向充磁的永磁体中间嵌入软磁材料,减少了高价格的钕铁硼永磁体用量,降低了电机成本;4)通过合理安排永磁材料与软磁材料尺寸以及其位置,在不增加永磁材料用量的基础上,可以很容易地获得正弦分布的气隙磁密,削弱谐波,减小转矩波动。 Beneficial effects of the present invention: 1) The stator plate adopts the coreless structure, which eliminates the cogging torque and core loss, improves the motor efficiency, and reduces the quality of the motor; 2) The magnetic steel plate adopts the combination of axial and tangential Halbach The permanent magnet array saves the rotor back iron, reduces the mass of the rotor, and improves the air gap magnetic density, thereby increasing the output torque of the motor and increasing the torque density; 3) In the adjacent two tangentially magnetized The soft magnetic material is embedded in the middle of the permanent magnet, which reduces the amount of high-priced NdFeB permanent magnets and reduces the cost of the motor; 4) By reasonably arranging the size and position of the permanent magnet material and soft magnetic material, the On the basis, it is easy to obtain a sinusoidally distributed air gap flux density, which weakens harmonics and reduces torque ripple.

附图说明 Description of drawings

图1是本发明的电机实施例的结构示意图; Fig. 1 is the structural representation of motor embodiment of the present invention;

图2是图1的剖视图; Fig. 2 is a sectional view of Fig. 1;

图3是本发明平均半径处电机内部结构的展开图。 Fig. 3 is an expanded view of the internal structure of the motor at the average radius of the present invention.

具体实施方式 Detailed ways

下面结合附图和具体实施方式对本发明做进一步说明。 The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

如图1和2所示,一种基于Halbach结构的无铁心轴向磁场无刷直流电动机,包括定子无铁心电枢盘1、永磁体2、转子盘3、轴5、轴承4和转子外壳6;所述定子无铁心电枢盘1的两侧设有两个对称转子盘3,定子无铁心电枢盘1和转子盘3安装在轴5上,轴5通过轴承4安装在转子外壳6内,所述转子盘3上粘贴有永磁体2,永磁体2粘贴在转子外壳6的内表面;所述永磁体2采用轴向充磁7与切向充磁8的Halbach磁体结构,自行形成闭合磁路,切向充磁8的永磁体2中间放置软磁材料9。如图3所示,每一个转子盘3上每一磁极由四部分构成:一块轴向充磁7的永磁体,两块90度切向充磁8的永磁体及一块软磁材料9。在同一转子盘上,轴向充磁的永磁体7N、S相隔,磁通沿轴向,由一磁钢盘上的轴向充磁N极永磁体7—气隙—定子无铁心电枢盘1—另一磁钢盘上轴向充磁N极永磁体—切向充磁永磁体、软磁材料—轴向充磁S极永磁体—气隙—轴向充磁S极永磁体—切向充磁永磁体、软磁材料—轴向充磁N极永磁体,如此形成一个闭合回路,无需转子背铁构成闭合磁路。 As shown in Figures 1 and 2, an ironless axial field brushless DC motor based on the Halbach structure includes a stator ironless armature disc 1, a permanent magnet 2, a rotor disc 3, a shaft 5, a bearing 4 and a rotor housing 6 The two sides of the stator coreless armature disc 1 are provided with two symmetrical rotor discs 3, the stator coreless armature disc 1 and the rotor disc 3 are installed on the shaft 5, and the shaft 5 is installed in the rotor shell 6 through the bearing 4 , the rotor disk 3 is pasted with a permanent magnet 2, and the permanent magnet 2 is pasted on the inner surface of the rotor housing 6; the permanent magnet 2 adopts the Halbach magnet structure of axial magnetization 7 and tangential magnetization 8, forming a closed In the magnetic circuit, a soft magnetic material 9 is placed in the middle of the permanent magnet 2 which is tangentially magnetized 8 . As shown in FIG. 3 , each magnetic pole on each rotor disk 3 is composed of four parts: a permanent magnet magnetized axially 7 , two permanent magnets magnetized tangentially at 90 degrees and a piece of soft magnetic material 9 . On the same rotor disc, the axially magnetized permanent magnets 7N and S are separated, and the magnetic flux is along the axial direction, and the axially magnetized N-pole permanent magnet 7 on a magnetic steel disc—air gap—stator coreless armature disc 1—Axially magnetized N pole permanent magnet on another magnetic steel plate—tangentially magnetized permanent magnet, soft magnetic material—axially magnetized S pole permanent magnet—air gap—axially magnetized S pole permanent magnet—cut Magnetizing permanent magnets, soft magnetic materials - axially magnetizing N-pole permanent magnets, thus forming a closed loop, without the need for rotor back iron to form a closed magnetic circuit.

所述定子无铁心电枢盘1采用非重叠集中绕组型式,直接由非重叠集中绕组直接注塑而成,该绕组型式具有端接部分短、加工方便的优点,定子上A、B、C三相绕组对称放置,设有引出线,用以施加三相交流电。所述转子外壳6由高机械强度的非磁性材料所构成,所述永磁体2选用高磁能积的钕铁硼材料。 The stator coreless armature disk 1 adopts the non-overlapping concentrated winding type, which is directly injection molded from the non-overlapping concentrated winding. The windings are placed symmetrically, and lead wires are provided for applying three-phase alternating current. The rotor shell 6 is made of non-magnetic material with high mechanical strength, and the permanent magnet 2 is made of NdFeB material with high magnetic energy product.

应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。本实施例中未明确的各组成部分均可用现有技术加以实现。 It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. All components that are not specified in this embodiment can be realized by existing technologies.

Claims (4)

1.一种基于Halbach结构的无铁心轴向磁场无刷直流电动机,其特征在于:包括定子无铁心电枢盘、永磁体、转子盘、轴、轴承和转子外壳; 1. A coreless axial magnetic field brushless DC motor based on Halbach structure, characterized in that: comprising stator coreless armature disc, permanent magnet, rotor disc, shaft, bearing and rotor housing; 所述定子无铁心电枢盘的两侧设有两个对称转子盘,定子无铁心电枢盘和转子盘安装在轴上,轴通过轴承安装在转子外壳内,所述转子盘上粘贴有永磁体,永磁体粘贴在转子外壳的内表面; There are two symmetrical rotor disks on both sides of the stator coreless armature disk, the stator coreless armature disk and the rotor disk are installed on the shaft, the shaft is installed in the rotor shell through the bearing, and the permanent rotor disk is pasted on the rotor disk. Magnet, the permanent magnet is pasted on the inner surface of the rotor shell; 所述永磁体采用轴向充磁与切向充磁的Halbach磁体结构,自行形成闭合磁路,所述切向充磁的永磁体中间放置软磁材料,每一个转子盘上每一磁极由四部分构成:轴向充磁的永磁体,软磁材料和两块切向充磁的永磁体。 The permanent magnet adopts the Halbach magnet structure of axial magnetization and tangential magnetization, and forms a closed magnetic circuit by itself. The soft magnetic material is placed in the middle of the tangential magnetization permanent magnet, and each magnetic pole on each rotor disk is composed of four Partial composition: axially magnetized permanent magnet, soft magnetic material and two tangentially magnetized permanent magnets. 2.根据权利要求1所述的一种基于Halbach结构的无铁心轴向磁场无刷直流电动机,其特征在于:所述定子无铁心电枢盘采用非重叠集中绕组型式。 2 . The coreless axial magnetic field brushless DC motor based on Halbach structure according to claim 1 , wherein the coreless armature disc of the stator adopts a non-overlapping concentrated winding type. 3 . 3.根据权利要求1所述的一种基于Halbach结构的无铁心轴向磁场无刷直流电动机,其特征在于:所述转子外壳由高机械强度的非磁性材料所构成。 3 . The coreless axial magnetic field brushless DC motor based on Halbach structure according to claim 1 , wherein the rotor shell is made of non-magnetic material with high mechanical strength. 4 . 4.根据权利要求1所述的一种基于Halbach结构的无铁心轴向磁场无刷直流电动机,其特征在于:所述永磁体选用高磁能积的钕铁硼材料。 4. A coreless axial magnetic field brushless DC motor based on Halbach structure according to claim 1, characterized in that: said permanent magnet is made of NdFeB material with high energy product.
CN2012102868293A 2012-08-13 2012-08-13 A Coreless Axial Field Brushless DC Motor Based on Halbach Structure Pending CN102904404A (en)

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CN103414301A (en) * 2013-08-15 2013-11-27 南京信息工程大学 Axial magnetic field ironless permanent magnet motor with split mounting type magnetic poles
CN104052221A (en) * 2014-06-12 2014-09-17 江苏大学 A Halbach permanent magnet fault-tolerant motor with hybrid magnetic material
CN104167893A (en) * 2013-05-17 2014-11-26 胡宪文 axial flux generator
CN105958687A (en) * 2016-04-27 2016-09-21 霍勇贤 Coreless permanent magnet motor inner rotor capable of magnetic congregate effect and manufacturing method thereof
GB2538515A (en) * 2015-05-19 2016-11-23 Greenspur Renewables Ltd Generator
CN104868671B (en) * 2015-05-12 2018-04-03 北京航空航天大学 A kind of coaxial two section Halbach permanent magnetism synchronous micromotors based on MEMS technology
CN110120716A (en) * 2019-05-15 2019-08-13 华中科技大学 A kind of combination array formula outer rotor axial and radial mixing behavior magnetic flow permanent magnet motor
CN111509879A (en) * 2019-01-30 2020-08-07 上海盘毂动力科技股份有限公司 Rotor, motor, electric automobile
KR20210013899A (en) * 2019-07-29 2021-02-08 한양대학교 산학협력단 Rotor for maximizing air-gap magnetic flux in slotless motor and slotless motor including the same
CN112688514A (en) * 2020-12-29 2021-04-20 福州大学 Permanent magnet motor with permanent magnet stator and coreless axial magnetic field
CN112713684A (en) * 2020-12-28 2021-04-27 广东白云学院 Multidirectional excitation in-wheel motor
CN114123586A (en) * 2021-11-22 2022-03-01 中国第一汽车股份有限公司 Variable magnetic flux axial flux motor
CN116404839A (en) * 2023-05-24 2023-07-07 安徽工程大学 A magnetism-concentrating disc-type permanent magnet motor and its installation method
RU223846U1 (en) * 2023-11-30 2024-03-05 Федеральное государственное бюджетное образовательно учреждение высшего образования "Уфимский университет науки и технологий" Electric disk machine with permanent magnets of various magnetizations
CN118739650A (en) * 2024-09-04 2024-10-01 北京理工大学长三角研究院(嘉兴) A permanent magnet unit, a permanent magnet and a dual-rotor axial permanent magnet motor thereof

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CN101958583A (en) * 2009-07-17 2011-01-26 株式会社安川电机 Periodic magnetic field generator and linear motor and rotary motor using it
CN101728912A (en) * 2010-02-04 2010-06-09 天津大学 Disk-type permanent magnet synchronous motor used for electric automobile hub based on Halbach structure
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Cited By (25)

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Publication number Priority date Publication date Assignee Title
CN104167893A (en) * 2013-05-17 2014-11-26 胡宪文 axial flux generator
CN104167893B (en) * 2013-05-17 2018-11-02 胡宪文 Axial flux generator
CN103414301A (en) * 2013-08-15 2013-11-27 南京信息工程大学 Axial magnetic field ironless permanent magnet motor with split mounting type magnetic poles
CN103414301B (en) * 2013-08-15 2016-05-25 南京信息工程大学 A kind of axial magnetic field coreless permanent magnet motor of pin-connected panel magnetic pole
CN104052221A (en) * 2014-06-12 2014-09-17 江苏大学 A Halbach permanent magnet fault-tolerant motor with hybrid magnetic material
CN104868671B (en) * 2015-05-12 2018-04-03 北京航空航天大学 A kind of coaxial two section Halbach permanent magnetism synchronous micromotors based on MEMS technology
GB2538515A (en) * 2015-05-19 2016-11-23 Greenspur Renewables Ltd Generator
CN107980195A (en) * 2015-05-19 2018-05-01 格林斯普可再生能源有限公司 The improved rotor for permanent magnet generator
GB2538515B (en) * 2015-05-19 2021-09-29 Time To Act Ltd Improved rotor for permanent magnet generator
US10637338B2 (en) 2015-05-19 2020-04-28 Time To Act Limited Rotor for permanent magnet generator
CN105958687A (en) * 2016-04-27 2016-09-21 霍勇贤 Coreless permanent magnet motor inner rotor capable of magnetic congregate effect and manufacturing method thereof
CN105958687B (en) * 2016-04-27 2020-02-14 霍勇贤 Coreless permanent magnet motor inner rotor with magnetism gathering effect and manufacturing method thereof
CN111509879A (en) * 2019-01-30 2020-08-07 上海盘毂动力科技股份有限公司 Rotor, motor, electric automobile
CN110120716A (en) * 2019-05-15 2019-08-13 华中科技大学 A kind of combination array formula outer rotor axial and radial mixing behavior magnetic flow permanent magnet motor
KR20210013899A (en) * 2019-07-29 2021-02-08 한양대학교 산학협력단 Rotor for maximizing air-gap magnetic flux in slotless motor and slotless motor including the same
KR102242638B1 (en) 2019-07-29 2021-04-20 한양대학교 산학협력단 Rotor for maximizing air-gap magnetic flux in slotless motor and slotless motor including the same
CN112713684A (en) * 2020-12-28 2021-04-27 广东白云学院 Multidirectional excitation in-wheel motor
CN112688514A (en) * 2020-12-29 2021-04-20 福州大学 Permanent magnet motor with permanent magnet stator and coreless axial magnetic field
CN112688514B (en) * 2020-12-29 2022-03-11 福州大学 Permanent magnet motor with permanent magnet stator and coreless axial magnetic field
CN114123586A (en) * 2021-11-22 2022-03-01 中国第一汽车股份有限公司 Variable magnetic flux axial flux motor
CN114123586B (en) * 2021-11-22 2023-04-14 中国第一汽车股份有限公司 Variable magnetic flux axial flux motor
CN116404839A (en) * 2023-05-24 2023-07-07 安徽工程大学 A magnetism-concentrating disc-type permanent magnet motor and its installation method
CN116404839B (en) * 2023-05-24 2024-02-27 安徽工程大学 Magnetic-focusing disc type permanent magnet motor and installation method thereof
RU223846U1 (en) * 2023-11-30 2024-03-05 Федеральное государственное бюджетное образовательно учреждение высшего образования "Уфимский университет науки и технологий" Electric disk machine with permanent magnets of various magnetizations
CN118739650A (en) * 2024-09-04 2024-10-01 北京理工大学长三角研究院(嘉兴) A permanent magnet unit, a permanent magnet and a dual-rotor axial permanent magnet motor thereof

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Application publication date: 20130130