WO2022057404A1 - 永磁同步无框电机的l形定子铁芯结构 - Google Patents

永磁同步无框电机的l形定子铁芯结构 Download PDF

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Publication number
WO2022057404A1
WO2022057404A1 PCT/CN2021/105200 CN2021105200W WO2022057404A1 WO 2022057404 A1 WO2022057404 A1 WO 2022057404A1 CN 2021105200 W CN2021105200 W CN 2021105200W WO 2022057404 A1 WO2022057404 A1 WO 2022057404A1
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Prior art keywords
outer ring
iron core
core structure
permanent magnet
magnet synchronous
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PCT/CN2021/105200
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English (en)
French (fr)
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尤卫建
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艾德斯汽车电机无锡有限公司
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Priority to EP21868233.4A priority Critical patent/EP4109716A4/en
Priority to JP2022557785A priority patent/JP2023518963A/ja
Publication of WO2022057404A1 publication Critical patent/WO2022057404A1/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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the slots
    • 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
    • H02K1/27—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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/08—Forming windings by laying conductors into or around core parts
    • H02K15/085—Forming windings by laying conductors into or around core parts by laying conductors into slotted stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/125—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets having an annular armature coil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/18—Windings for salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings

Definitions

  • the invention relates to the technical field of motor structures, in particular to an L-shaped stator core structure of a permanent magnet synchronous frameless motor.
  • the assembly process of the coil windings of small or micro motors with a diameter of less than 150mm is relatively complicated.
  • the existing coils wound with circular enameled wires have poor craftsmanship, low production efficiency, high defective product rate, and high equipment requirements. It is very high, and when the I-shaped (or T-shaped) stator core structure is assembled with a flat wire upright coil winding structure with better performance, it is difficult to assemble the winding set on the stator iron due to the existence of the tooth shoe and the outer ring edge. On the center column between the core gear shoe and the outer ring edge.
  • the present invention provides an L-shaped stator core structure of a permanent magnet synchronous frameless motor that is convenient for coil winding assembly.
  • the L-shaped stator iron core structure of the permanent magnet synchronous frameless motor includes a plurality of iron core units arranged in a ring direction, and the iron core unit is composed of an outer ring edge, an inner gear shoe, an outer ring edge and an inner ring edge.
  • the middle column between the gear shoes is composed of the inner gear shoe, the middle column and the outer ring edge from top to bottom to form an L-shaped iron core unit, and a matching positioning card is arranged on the outer ring side of the L-shaped iron core unit
  • the slot and the positioning card protrusion are connected and arranged in a ring direction through the positioning card groove and the positioning card protrusion.
  • outer side surface of the outer ring edge is curved in an arc shape, so that the outer peripheral sides of the iron core structure after a plurality of iron core units are arranged in a circular direction are on the same circular surface.
  • one end of the outer ring edge is provided with a positioning card slot, and the other end is provided with a positioning card protrusion.
  • the positioning snap projection is arranged on the outer end of the outer ring side of the L-shaped iron core single body, and the other end of the outer ring side, that is, the end connected with the central column, is provided with a positioning snap groove.
  • the inner side surface of the inner gear shoe is curved in an arc shape, so that the inner peripheral side of the iron core structure after the plurality of iron core units are arranged in a ring direction is on the same circular surface.
  • a winding cavity is formed between the adjacent central pillars.
  • the present invention has the following advantages:
  • the L-shaped stator core structure of the permanent magnet synchronous frameless motor of the present invention facilitates the assembly of the preformed winding group, facilitates the assembly of the flat wire upright coil winding structure with better performance, and is suitable for the production of micro and small motors , and then meet the high slot full rate requirements of micro and small motors, ensure that the inductance and resistance of the windings assembled on the central column are consistent, and ensure the consistency of each winding of the stator core structure.
  • Fig. 1 is the schematic cross-sectional structure diagram of the stator core structure of the present invention
  • Fig. 2 is a schematic diagram of the structure of a single core of the iron core
  • FIG. 3 is a structural diagram of an iron core unit for assembling a flat wire vertical coil winding
  • FIG. 4 is a bottom structural view of the S part in FIG. 3 .
  • an L-shaped stator iron core structure of a permanent magnet synchronous frameless motor includes a plurality of iron core units 1 arranged in a circumferential direction.
  • the ring side 11, the inner gear shoe 13 and the middle column 12 between the outer ring side 11 and the inner gear shoe 13 are composed.
  • the inner gear shoe 13, the middle column 12 and the outer ring side 11 form an L-shaped iron core from top to bottom.
  • Body 1, the outer ring edge 11 of the L-shaped iron core unit 1 is provided with a matching positioning card slot 14 and a positioning card protrusion 15, and a plurality of iron core units 1 are connected through the positioning card groove 14 and the positioning card protrusion 15.
  • the size of the stator core structure in this embodiment shown in Figure 1 is: the outer diameter (the length from the cross-section circle point to the outer peripheral side of the outer ring edge) 34.50mm, the inner diameter (the cross-section circle point to the inner The length of the inner peripheral side of the gear shoe) is 25.80mm, and the length from the circular point of the cross section to the inner peripheral side of the outer ring edge is 32.30mm. Change the length of 12, reduce or increase the number of core units 1, and change to other sizes of stator core structures.
  • outer side surface of the outer ring edge 11 is curved in an arc shape, so that the outer peripheral sides of the iron core structure after the plurality of iron core units 1 are arranged in a circular direction are on the same circular surface.
  • the plurality of iron core units 1 are circumferentially arranged into a stator iron core structure with an annular cross-section.
  • the positioning protrusion 15 is disposed on the outer end of the outer ring edge 11 of the L-shaped iron core unit 1 , and the other end of the outer ring edge 11 , that is, the end connected with the center column 12 , is provided with a positioning card slot 14 .
  • the inner side surface of the inner gear shoe 13 is curved in an arc shape, so that the inner peripheral sides of the iron core structure after the plurality of iron core units 1 are arranged in a ring direction are on the same circular surface.
  • a winding cavity 3 is formed between the adjacent central pillars 12.
  • the flat wire upright coil winding 2 is structurally assembled, the flat wire upright coil winding 2 is placed along the outer edge of the outer ring edge 11 of the L-shaped iron core unit 1. The end is sleeved, and the assembly of the flat wire vertical coil winding 2 is completed along the outer ring edge 11 to the center column 12.
  • the structure of the flat wire vertical coil winding 2 and the assembled iron core unit 1 is shown in Figures 3 and 4 .
  • the inlet and outlet ends 21 are connected to each other.
  • the flat wire vertical coil winding 2 is a vertical winding made of flat enameled wire.
  • the vertical winding is sleeved on the outside of the central column 12 to form a coil winding unit, and a plurality of coil winding units are in the form of a ring.
  • the L-shaped stator core structure of the permanent magnet synchronous frameless motor of the present invention is very convenient to assemble the pre-formed winding structure such as the flat wire upright coil winding 2 and the like, and is very suitable for the preparation of small and micro motors.
  • each winding of the permanent magnet synchronous frameless motor coil winding structure is of equal length and the shape of the coil winding is the same. That is, the windings assembled on the central column 12 can achieve the same inductance and resistance, and ensure the consistency of each winding.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

本发明公开了一种永磁同步无框电机的L形定子铁芯结构，包括呈环向排布的多个铁芯单体，所述的铁芯单体由外环边、内齿靴以及外环边和内齿靴之间的中柱组成，内齿靴、中柱和外环边由上至下组成L形的铁芯单体，L形铁芯单体的外环边上设置有相匹配的定位卡槽和定位卡凸，多个铁芯单体通过定位卡槽和定位卡凸连接并呈环向排布。本发明的永磁同步无框电机的L形定子铁芯结构方便预先成型的绕线组的装配，便于实现性能较好的扁线直立线圈绕组结构的装配，适用于微型、小型电机的生产制造，进而满足微型、小型电机的高槽满率要求，确保装配在中柱上的绕组的电感一致、电阻一致，保证定子铁芯结构每个绕组的一致性。

Description

永磁同步无框电机的L形定子铁芯结构 技术领域
本发明涉及电动机结构技术领域，尤其是涉及一种永磁同步无框电机的L形定子铁芯结构。
背景技术
随着工业4.0逐步在我国工业领域展开，协作机器人的关节电机、高精度伺服电机的需求越来越大。这些电机的核心元件-无框电机技术的发展与需求不成比例的现象越来越严重，高精度无框电机尤其是和集成电路芯片有关的协作机器人关节电机一直受制于技术瓶颈而难以获得实质性的突破。为了改变这种情况，本领域技术人员不断加深对高精度无框电机技术的研究、探索，而且现有技术中已存在多种系列的高精度无框电机产品。但现有的高精度无框电机产品普遍存在槽满率低，电磁特性不佳的缺点；而且现有的高精度无框电机产品通常采用工形(或者T形)的定子铁芯结构，对于直径在150mm以下的小型或者微型电机的线圈绕组的装配过程较为复杂，现有的采用的圆形漆包线绕制的线圈工艺性不好，生产效率低、不良品率比较高，对设备的要求也非常高，而工形(或者T形)的定子铁芯结构在采用性能较好的扁线直立线圈绕组结构装配时，由于齿靴及外环边的存在，难以将绕线组装配于定子铁芯齿靴和外环边之间的中柱上。
发明内容
针对现有技术不足，本发明提供了一种便于线圈绕组装配的永磁同步无框电机的L形定子铁芯结构。
本发明解决上述技术问题采用的技术方案为：
永磁同步无框电机的L形定子铁芯结构，其包括呈环向排布的多个铁芯单体，所述的铁芯单体由外环边、内齿靴以及外环边和内齿靴之间的中柱组成，内齿靴、中柱和外环边由上至下组成L形的铁芯单体，L形铁芯单体的外环边上设置有相匹配的定位卡槽和定位卡凸，多个铁芯单体通过定位卡槽和定位卡凸连接并呈环向排布。
进一步地，所述的外环边的外侧面呈弧形弯曲，使多个铁芯单体呈环向排布后的铁芯结构外周侧处于同一圆面。
进一步地，所述的外环边的一端设置有定位卡槽，另一端设置有定位卡凸。
进一步地，所述的定位卡凸设置于L形铁芯单体外环边的外端部，外环边的另一端即与中柱连接的一端设置定位卡槽。
进一步地，所述的内齿靴的内侧面呈弧形弯曲，使多个铁芯单体呈环向排布后的铁芯结构的内周侧处于同一圆面。
进一步地，相邻的所述中柱之间形成绕线腔。
与现有技术相比，本发明具备的优点为：
本发明的永磁同步无框电机的L形定子铁芯结构方便预先成型的绕线组的装配，便于实现性能较好的扁线直立线圈绕组结构的装配，适用于微型、小型电机的生产制造，进而满足微型、小型电机的高槽满率要求，确保装配在中柱上的绕组的电感一致、电阻一致，保证定子铁芯结构每个绕组的一致性。
附图说明
图1为本发明定子铁芯结构的截面结构示意图；
图2为铁芯单体结构示意图；
图3为装配扁线直立线圈绕组的铁芯单体结构图；
图4为图3中S部位的仰视结构图。
图中，1-铁芯单体，11-外环边，12-中柱，13-内齿靴，14-定位卡槽，15-定位卡凸，2-扁线直立线圈绕组，21-进出端，3-绕线腔。
具体实施方式
下面结合附图对本发明做进一步的说明，但本发明的保护范围不限于下述的实施例。本领域技术人员对在本发明的启示下所做的任何等效改换均应落入本发明保护范围之内。
如图1、2所示，一种永磁同步无框电机的L形定子铁芯结构，其包括呈环向排布的多个铁芯单体1，所述的铁芯单体1由外环边11、内齿靴13以及外环边11和内齿靴13之间的中柱12组成，内齿靴13、中柱12和外环边11由上至下组成L形的铁芯单体1，L形铁芯单体1的外环边11上设置有相匹配的定位卡槽14和定位卡凸15，多个铁芯单体1通过定位卡槽14和定位卡凸15连接并呈环向排布，图1所示的本实施例中定子铁芯结构的尺寸为：外径(截面圆圆点至外环边外周侧的长度)34.50mm，内径(截面圆圆点至内齿靴内周侧的长度)25.80mm，截面圆圆点至外环边内周侧的长度为32.30mm，在其他实施例中可以采用如图1中尺寸的等比例变化尺寸，或者改变中柱12的长度、减少或者增加铁芯单体1的数量，改变为其他尺寸的定子铁芯结构。
进一步地，所述的外环边11的外侧面呈弧形弯曲，使多个铁芯单体1呈环向排布后的铁芯结构外周侧处于同一圆面。
进一步地，所述的外环边11的一端设置有定位卡槽14，另一端设置有定位卡凸15，相邻铁芯单体1上的定位卡槽14和定位卡凸15配合卡合使多个铁芯单体1环向排布为截面圆环形的定子铁芯结构。
进一步地，所述的定位卡凸15设置于L形铁芯单体1外环边11的外端部，外环边11的另一端即与中柱12连接的一端设置定位卡槽14。
进一步地，所述的内齿靴13的内侧面呈弧形弯曲，使多个铁芯单体1呈环向排布后的铁芯结构的内周侧处于同一圆面。
进一步地，相邻的所述中柱12之间形成绕线腔3，扁线直立线圈绕组2结构装配时，将扁线直立线圈绕组2沿L形铁芯单体1外环边11的外端部套入，沿着外环边11直至中柱12处完成扁线直立线圈绕组2的装配，扁线直立线圈绕组2及装配后的铁芯单体1结构如图3和图4所示。采用厚度为0.5毫米以下的扁漆包线，通过引导式工艺装入定子齿槽，以绕制好扁线绕组2，确保每一个线圈的漆包线长度和外形尺寸一致，不同线圈绕组上的扁线绕组2的进出端21相互连接。所述的扁线直立线圈绕组2为扁漆包线绕制而成的立式绕组，所述立式绕组套设在所述中柱12的外部组成线圈绕组单体，多个线圈绕组单体呈环向排布在永磁转子和定子之间，所述永磁转子的外部固定连接有若干永磁体，以使无框电机可利用磁钢不同的充磁方向，在磁钢之间重建磁通路，实现无硅钢片转子产生转距的目标。采用本发明的永磁同步无框电机的L形定子铁芯结构非常方便如扁线直立线圈绕组2等预先成型的绕线组结构的装配，非常适用于小型、微型电机的制备，有助于提高电机的槽满率，同时装配如扁线直立线圈绕组2等预先成型的绕线组结构可以使得永磁同步无框电机的线圈绕组结构每一个绕组都是等长度的、线圈绕组形状是相同的，即装配在中柱12上的绕组可以实现电感一致、电阻一致，保证每个绕组的一致性。

Claims (6)

  1. 永磁同步无框电机的L形定子铁芯结构，包括呈环向排布的多个铁芯单体，其特征在于：所述的铁芯单体由外环边、内齿靴以及外环边和内齿靴之间的中柱组成，内齿靴、中柱和外环边由上至下组成L形的铁芯单体，L形铁芯单体的外环边上设置有相匹配的定位卡槽和定位卡凸，多个铁芯单体通过定位卡槽和定位卡凸连接并呈环向排布。
  2. 根据权利要求1所述的永磁同步无框电机的L形定子铁芯结构，其特征在于：所述的外环边的外侧面呈弧形弯曲，使多个铁芯单体呈环向排布后的铁芯结构外周侧处于同一圆面。
  3. 根据权利要求1或2所述的永磁同步无框电机的L形定子铁芯结构，其特征在于：所述的外环边的一端设置有定位卡槽，另一端设置有定位卡凸。
  4. 根据权利要求3所述的永磁同步无框电机的L形定子铁芯结构，其特征在于：所述的定位卡凸设置于L形铁芯单体外环边的外端部，外环边的另一端即与中柱连接的一端设置定位卡槽。
  5. 根据权利要求1所述的永磁同步无框电机的L形定子铁芯结构，其特征在于：所述的内齿靴的内侧面呈弧形弯曲，使多个铁芯单体呈环向排布后的铁芯结构的内周侧处于同一圆面。
  6. 根据权利要求1所述的永磁同步无框电机的L形定子铁芯结构，其特征在于：相邻的所述中柱之间形成绕线腔。
PCT/CN2021/105200 2020-09-21 2021-07-08 永磁同步无框电机的l形定子铁芯结构 WO2022057404A1 (zh)

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