WO2024060734A1 - 一种基于扁线分段斜槽绕组的定子组件 - Google Patents

一种基于扁线分段斜槽绕组的定子组件 Download PDF

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Publication number
WO2024060734A1
WO2024060734A1 PCT/CN2023/102347 CN2023102347W WO2024060734A1 WO 2024060734 A1 WO2024060734 A1 WO 2024060734A1 CN 2023102347 W CN2023102347 W CN 2023102347W WO 2024060734 A1 WO2024060734 A1 WO 2024060734A1
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Prior art keywords
flat wire
oil guide
stator
section
iron core
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PCT/CN2023/102347
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English (en)
French (fr)
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牛铭奎
冯焕江
陆丹
高志川
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丽水方德智驱应用技术研究院有限公司
浙江方正电机股份有限公司
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Publication of WO2024060734A1 publication Critical patent/WO2024060734A1/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
    • H02K1/16—Stator cores with slots for windings
    • 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
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • 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
    • H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the present invention relates to the technical field of permanent magnet synchronous drive motors for new energy vehicles, and more specifically, to a stator assembly based on flat wire segmented chute windings.
  • NVH has attracted more and more attention from R&D personnel.
  • An effective way to solve the NVH problem is the inclined pole of the motor, which is divided into stator inclined pole and rotor inclined pole, and there are continuous inclined poles and segmented inclined poles.
  • the rotor generally adopts segmented inclined poles.
  • Most of the stators of round wire motors have non-inclined poles or continuous inclined poles.
  • the stators of flat wire motors generally do not have inclined poles due to process and other reasons.
  • the object of the present invention is to provide a stator assembly with a simple structure based on flat wire segmented inclined slot windings.
  • This stator assembly not only realizes stator inclined poles, but also It can cool the middle part of the rotor and the ends of the windings.
  • a stator assembly based on flat wire segmented inclined slot windings including a stator core and a flat wire winding inserted in the stator core.
  • the stator core is in multiple segments, and adjacent stator cores are connected by connecting pieces.
  • Fixed, the flat wire winding includes a plurality of flat wire conductors, each flat wire conductor is twisted in the same direction at the connecting piece, so that the upper and lower parts of the flat wire conductor are misaligned with each other.
  • the stator core is in two sections, including a first section of iron core and a second section of iron core, and the first section of iron core and the second section of iron core are fixed by a connecting piece.
  • the flat wire conductor includes a first straight section, a bent section and a second straight section, the first straight section and the second straight section are respectively inserted into the first section of the iron core and the second section of the iron core.
  • the bent section is located inside the connector.
  • the connecting piece is annular, and the outer wall is provided with an oil guide ring groove.
  • a plurality of radial oil guide holes are provided at the bottom of the oil guide ring groove, and the plurality of radial oil guide holes are distributed at equal intervals along the circumference.
  • the two side walls of the oil guide ring groove are respectively provided with axial oil guide holes, and the stator core is also provided with a cooling pipeline connected with the axial oil guide holes.
  • the present invention can realize the tilt pole of the flat wire motor stator at any angle. Compared with the simple rotor segmented tilt pole, the stator and rotor mutually cooperated tilt pole method can better solve the problem of motor NVH. question.
  • Figure 1 is a schematic diagram of the overall structure of the present invention.
  • Figure 2 is a schematic diagram of the overall structure of the connector of the present invention.
  • Figure 3 is a schematic structural diagram of the flat wire conductor of the present invention.
  • the reference numbers are: 1. First section of iron core; 2. Second section of iron core; 3. Connector; 4. Flat wire conductor; 31. Axial oil guide hole; 32. Radial oil guide hole; 33. Oil guide ring groove ; 41. The first straight line segment; 42. The bending segment; 43. The second straight line segment.
  • first and second are used for descriptive purposes only and are not to be construed as indicators. or imply relative importance or implicitly specify the quantity of technical features indicated. Therefore, features defined as “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise stated, the meaning of "plurality” is two or more than two, unless otherwise clearly defined.
  • the terms “installed”, “connected”, “connected”, “fixed” and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components.
  • installed can be a fixed connection, a detachable connection, or an integral connection
  • it can be a mechanical connection or an electrical connection
  • it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components.
  • the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
  • the term “above” or “below” a first feature of a second feature may include direct contact between the first and second features, or may also include the first and second features. Not in direct contact but through additional characteristic contact between them.
  • the terms “above”, “above” and “above” a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature.
  • “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.
  • a stator assembly based on a flat wire segmented skew slot winding includes a stator core and a flat wire winding inserted in the stator core.
  • the stator core is multi-segmented, and adjacent stator cores are fixed by a connector 3.
  • the flat wire winding includes a plurality of flat wire conductors 4. Each flat wire conductor 4 is twisted in the same direction at the connector 3, so that the upper and lower parts of the flat wire conductor 4 are offset from each other.
  • the stator core is divided into two sections, including a first section core 1 and a second section core 2 , and the first section core 1 and the second section core 2 are fixed by a connecting member 3 .
  • the flat wire conductor 4 includes a first straight section 41, a bent section 42 and The second straight section 43 , the first straight section 41 and the second straight section 43 are inserted into the first section of the iron core 1 and the second section of the iron core 2 respectively, and the bent section 42 is located inside the connecting piece 3 .
  • the flat wire conductor is twisted in the middle of the two sections of iron core to form a bent section 42.
  • the flat wire conductor can be inserted into a section of the iron core and then twisted (applicable to HairPin-IPin, Ipin-IPin), or it can be twisted first and then inserted into the iron core.
  • the flat wire conductor in the present invention does not involve end connection parts and can satisfy all end connection forms of flat wire motors.
  • the connecting piece 3 is annular, and the outer wall is provided with an oil guide ring groove 33.
  • the bottom of the oil guide ring groove 33 is provided with a plurality of radial oil guide holes 32, and the plurality of radial oil guide holes 32 are distributed at equal intervals along the circumference.
  • the two side walls of the oil guide ring groove 33 are respectively provided with axial oil guide holes 31, and the stator core is also provided with a cooling pipeline connected with the axial oil guide holes 31.
  • There are also a plurality of axial oil guide holes 31 and the number is the same as the number of cooling pipes.
  • the plurality of axial oil guide holes 31 are distributed at equal intervals along the circumference.
  • an oil guide annular groove is arranged at the oblique pole space position of the aforementioned design. While connecting the fixed segmented stator core, the cooling oil can pass through the oil guide holes distributed along the radial and axial directions, effectively cooling the stator ends. and the middle part of the rotor.
  • the present invention can separately design oil guide ring grooves and oil guide holes based on the flow resistance of each oil circuit to control the flow through each oil guide hole, and ultimately achieve a good cooling effect on both the stator end and the rotor.
  • the present invention achieves segmented inclined poles of the stator through the overall torsion of the flat wire winding and the rotation of the stator core; and an oil guide ring groove is provided to cool the rotor through the radial oil guide holes.
  • the stator end is cooled through the axial oil guide hole and the oil guide hole on the stator core.

Abstract

本发明涉及一种基于扁线分段斜槽绕组的定子组件，包括定子铁芯以及插设在定子铁芯内的扁线绕组，所述定子铁芯为多段，且相邻定子铁芯之间通过连接件固定，所述扁线绕组包括多根扁线导体，每根扁线导体在连接件处朝同一方向扭转，使得扁线导体的上下两部分相互错位。本发明通过设置扁线导体中间部位的扭头，可以实现扁线电机定子的任意角度斜极，与单纯的转子分段斜极相比，定转子相互配合的斜极方式可以更好的解决电机NVH问题。

Description

一种基于扁线分段斜槽绕组的定子组件
本申请要求于2022年9月21日提交中国专利局、申请号为202211150803.6、发明名称为“一种基于扁线分段斜槽绕组的定子组件”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及新能源汽车用永磁同步驱动电机技术领域，更具体地说，是涉及一种基于扁线分段斜槽绕组的定子组件。
背景技术
随着新能源电动汽车的飞速普及，永磁同步电机作为新能源驱动电机应用最广的电机，电动汽车的特点之一就是静音，而驱动电机的电磁噪声是整车噪声的主要来源之一。随着消费者生活水平的提高，对汽车舒适性的关注度越来越高。所以NVH越受到研发人员的关注。同时，效率更高的扁线电机也越来越多的应用到新能源驱动电机行业。一种有效解决NVH问题的方式是电机斜极，分为定子斜极和转子斜极，且有连续斜极分段斜极之分。转子一般采用分段斜极，圆线电机的定子大多不斜极或连续斜极，但扁线电机的定子由于工艺等原因一般不斜极。
另外，电机绕组端部、转子(特别是转子中间部位)的散热问题一直是行业的难题。同时油冷技术被越来越多应用到电机的冷却当中。现有的油冷技术大多通过端部喷油或滴油实现，需要在端部布置额外的装置，整体结构复杂，成本增加。
发明内容
为了解决上述技术问题，本发明的目的在于一种结构简单的基于扁线分段斜槽绕组的定子组件，该定子组件不仅实现了定子斜极，还 能对转子中部和绕组端部进行冷却。
为了实现上述发明目的，本发明采用以下技术方案：
一种基于扁线分段斜槽绕组的定子组件，包括定子铁芯以及插设在定子铁芯内的扁线绕组，所述定子铁芯为多段，且相邻定子铁芯之间通过连接件固定，所述扁线绕组包括多根扁线导体，每根扁线导体在连接件处朝同一方向扭转，使得扁线导体的上下两部分相互错位。
作为优选方案：所述定子铁芯为两段，包括第一段铁芯和第二段铁芯，且第一段铁芯和第二段铁芯通过连接件固定。
作为优选方案：所述扁线导体包括第一直线段、折弯段和第二直线段，所述第一直线段和第二直线段分别插入第一段铁芯和第二段铁芯内，所述折弯段位于连接件内侧。
作为优选方案：所述连接件成环状，且外壁设有导油环槽。
作为优选方案：所述导油环槽的底部设有多个径向导油孔，且多个径向导油孔沿圆周等距间隔分布。
作为优选方案：所述导油环槽的两侧壁分别设有轴向导油孔，所述定子铁芯上也设有与轴向导油孔相连通的冷却管路。
作为优选方案：所述轴向导油孔也为多个，且数量与冷却管路数量相同，多个轴向导油孔沿圆周等距间隔分布。
与现有技术相比，本发明的有益效果为：
本发明通过设置扁线导体中间部位的扭头，可以实现扁线电机定子的任意角度斜极，与单纯的转子分段斜极相比，定转子相互配合的斜极方式可以更好的解决电机NVH问题。
附图说明
构成本申请的一部分的说明书附图用来提供对本申请的进一步 理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的限定。
图1为本发明的整体结构示意图；
图2为本发明的连接件的整体结构示意图；
图3为本发明的扁线导体的结构示意图。
附图标记为：1、第一段铁芯；2、第二段铁芯；3、连接件；4、扁线导体；31、轴向导油孔；32、径向导油孔；33、导油环槽；41、第一直线段；42、折弯段；43、第二直线段。
具体实施方式
应该指出，以下详细说明都是例示性的，旨在对本申请提供进一步的说明。除非另有指明，本文使用的所有技术和科学术语具有与本申请所属技术领域的普通技术人员通常理解的相同含义。
需要注意的是，这里所使用的术语仅是为了描述具体实施方式，而非意图限制根据本申请的示例性实施方式。如在这里所使用的，除非上下文另外明确指出，否则单数形式也意图包括复数形式，此外，还应当理解的是，当在本说明书中使用术语“包含”和/或“包括”时，其指明存在特征、步骤、操作、器件、部件和/或它们的组合。
此外，在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示 或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本发明的描述中，除非另有说明，“多个”的含义是两个或两个以上，除非另有明确的限定。
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，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，可以根据具体情况理解上述术语在本发明中的具体含义。
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
下面结合附图与实施例对本发明作进一步说明：
如图1所示的一种基于扁线分段斜槽绕组的定子组件，包括定子铁芯以及插设在定子铁芯内的扁线绕组，所述定子铁芯为多段，且相邻定子铁芯之间通过连接件3固定，所述扁线绕组包括多根扁线导体4，每根扁线导体4在连接件3处朝同一方向扭转，使得扁线导体4的上下两部分相互错位。
所述定子铁芯为两段，包括第一段铁芯1和第二段铁芯2，且第一段铁芯1和第二段铁芯2通过连接件3固定。
如图3所示，所述扁线导体4包括第一直线段41、折弯段42和 第二直线段43，所述第一直线段41和第二直线段43分别插入第一段铁芯1和第二段铁芯2内，所述折弯段42位于连接件3内侧。扁线导体在两段铁芯中间的位置扭转形成折弯段42，扁线导体可以插入一段铁芯后扭转(适用于HairPin-IPin、Ipin-IPin),也可先行扭转成型后插入铁芯。本发明中的扁线导体不涉及端部连接部分，可满足所有的扁线电机端部连接形式。
所述连接件3成环状，且外壁设有导油环槽33。所述导油环槽33的底部设有多个径向导油孔32，且多个径向导油孔32沿圆周等距间隔分布。所述导油环槽33的两侧壁分别设有轴向导油孔31，所述定子铁芯上也设有与轴向导油孔31相连通的冷却管路。所述轴向导油孔31也为多个，且数量与冷却管路数量相同，多个轴向导油孔31沿圆周等距间隔分布。
而本发明在前述设计的斜极空间位置处布置导油环槽，在连接固定分段的定子铁芯的同时，冷却油可以通过沿径向和轴向分布的导油孔，有效冷却定子端部以及转子中间部位。本发明可以结合各个油路的流阻分别设计导油环槽、导油孔以控制流经各个导油孔的流量，最终实现定子端部和转子均有良好冷却效果。
综上所述，本发明通过扁线绕组的整体扭转，配合定子铁芯的旋转，实现定子分段斜极；并设置了导油环槽，经径向的导油孔实现对转子的冷却，经轴向的导油孔与定子铁芯上的导油孔实现对定子端部的冷却。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
尽管上面已经示出和描述了本发明的实施例，可以理解的是，上 述实施例是示例性的，不能理解为对本发明的限制，本领域的普通技术人员在不脱离本发明的原理和宗旨的情况下在本发明的范围内可以对上述实施例进行变化、修改、替换和变型，凡是依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。

Claims (7)

  1. 一种基于扁线分段斜槽绕组的定子组件，包括定子铁芯以及插设在定子铁芯内的扁线绕组，其特征在于：所述定子铁芯为多段，且相邻定子铁芯之间通过连接件(3)固定，所述扁线绕组包括多根扁线导体(4)，每根扁线导体(4)在连接件(3)处朝同一方向扭转，使得扁线导体(4)的上下两部分相互错位。
  2. 根据权利要求1所述的一种基于扁线分段斜槽绕组的定子组件，其特征在于：所述定子铁芯为两段，包括第一段铁芯(1)和第二段铁芯(2)，且第一段铁芯(1)和第二段铁芯(2)通过连接件(3)固定。
  3. 根据权利要求2所述的一种基于扁线分段斜槽绕组的定子组件，其特征在于：所述扁线导体(4)包括第一直线段(41)、折弯段(42)和第二直线段(43)，所述第一直线段(41)和第二直线段(43)分别插入第一段铁芯(1)和第二段铁芯(2)内，所述折弯段(42)位于连接件(3)内侧。
  4. 根据权利要求1所述的一种基于扁线分段斜槽绕组的定子组件，其特征在于：所述连接件(3)成环状，且外壁设有导油环槽(33)。
  5. 根据权利要求4所述的一种基于扁线分段斜槽绕组的定子组件，其特征在于：所述导油环槽(33)的底部设有多个径向导油孔(32)，且多个径向导油孔(32)沿圆周等距间隔分布。
  6. 根据权利要求4所述的一种基于扁线分段斜槽绕组的定子组件，其特征在于：所述导油环槽(33)的两侧壁分别设有轴向导油孔(31)，所述定子铁芯上也设有与轴向导油孔(31)相连通的冷却管路。
  7. 根据权利要求6所述的一种基于扁线分段斜槽绕组的定子组件，其特征在于：所述轴向导油孔(31)也为多个，且数量与冷却管路数量相同，多个轴向导油孔(31)沿圆周等距间隔分布。
PCT/CN2023/102347 2022-09-21 2023-06-26 一种基于扁线分段斜槽绕组的定子组件 WO2024060734A1 (zh)

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JP2012100389A (ja) * 2010-10-29 2012-05-24 Denso Corp 回転電機及びその固定子並びに製造方法
JP2012143065A (ja) * 2010-12-28 2012-07-26 Denso Corp 回転電機の固定子及びその製造方法
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