WO2021114453A1 - 一种永磁电机的定子结构 - Google Patents

一种永磁电机的定子结构 Download PDF

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Publication number
WO2021114453A1
WO2021114453A1 PCT/CN2020/071225 CN2020071225W WO2021114453A1 WO 2021114453 A1 WO2021114453 A1 WO 2021114453A1 CN 2020071225 W CN2020071225 W CN 2020071225W WO 2021114453 A1 WO2021114453 A1 WO 2021114453A1
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WO
WIPO (PCT)
Prior art keywords
stator
winding
motor
iron core
inner stator
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PCT/CN2020/071225
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English (en)
French (fr)
Inventor
洪真
李朝阳
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深圳市中悦机电科技有限公司
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Publication of WO2021114453A1 publication Critical patent/WO2021114453A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/04—Machines with one rotor and two stators
    • 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
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • the invention relates to the technical field of permanent magnet motors, in particular to a stator structure of a permanent magnet motor.
  • permanent magnet motors have been widely used in motor systems with their advantages of high efficiency, high power density, and high power factor.
  • the current permanent magnet motors all use a stator to drive the motor rotor to rotate, which limits the efficiency and power density of the motor.
  • the present invention mainly provides a stator structure of a permanent magnet motor, and solves the problem that the prior art uses a stator to drive the motor rotor to rotate, which limits the efficiency and power density of the motor.
  • the present invention adopts the following technical solutions:
  • a stator structure of a permanent magnet motor includes an inner stator and an outer stator coaxially sleeved from the inside to the outside; the inner stator includes an inner stator iron core and an inner stator winding arranged on the inner stator iron core,
  • the outer stator includes an outer stator iron core and an outer stator winding arranged on the outer stator iron core; the inner stator iron core is installed on the secondary shaft of the motor rotor, and the outer stator iron core is installed on the motor housing
  • the number of winding slots on the inner stator core and the outer stator core is the same, the inner stator winding and the outer stator winding are wound in the same manner, and the inner stator winding and the outer stator winding are wound
  • the phase difference between the lines is 180 degrees.
  • outer stator and the outer magnetic poles of the rotor form an outer air gap magnetic field of the motor
  • inner stator and the inner magnetic poles of the rotor form an inner air gap magnetic field of the motor
  • the inner stator iron core and the outer stator iron core are both formed by stacking silicon steel sheets.
  • the stator structure of this solution uses fractional slot, single and double-layer hybrid concentrated windings.
  • the beneficial effects of this winding are to reduce the cogging torque of the motor, increase the output torque of the motor, and reduce the use of copper wires. Reduce the resistance of the winding, reduce the copper loss of the motor, and reduce the temperature rise of the motor.
  • Figure 1 is a half-sectional schematic diagram of the stator structure of this embodiment
  • Figure 2 is a distribution diagram of the stator windings of this embodiment
  • Figure 3 is a schematic diagram of the installation of the stator structure of the embodiment
  • stator structure of a permanent magnet motor related to the present invention will be further described in detail below in conjunction with embodiments.
  • the stator structure of a permanent magnet motor of this embodiment includes an inner stator and an outer stator coaxially sleeved from the inside to the outside;
  • the inner stator includes an inner stator core 1, and an inner stator winding set on the inner stator core 1, the outer stator comprising an outer stator core 2 and an outer stator winding set on the outer stator core 2;
  • the inner stator iron The core 1 is installed on the secondary shaft 3 of the motor rotor, the outer stator core 2 is installed on the inner wall of the motor housing 4, and the number of winding slots 5 on the inner stator core 1 and the outer stator core 2 are the same
  • the winding method of the inner stator winding and the outer stator winding is the same, and the winding phase of the inner stator winding and the outer stator winding is 180 degrees out of phase.
  • the outer stator and the outer magnetic poles of the rotor form the outer air gap magnetic field of the motor, and the inner stator and the inner magnetic poles of the rotor form the inner air gap magnetic field of the motor.
  • the inner stator core 1 and the outer stator core 2 are both made of silicon steel sheets stacked.
  • the stator structure of this scheme adopts fractional slot, single and double-layer hybrid concentrated winding.
  • the beneficial effect of this winding is to reduce the cogging torque of the motor, increase the output torque of the motor, reduce the use of copper wire, and reduce The resistance of the winding reduces the copper loss of the motor and reduces the temperature rise of the motor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

本发明涉及永磁电机技术领域，且公开了一种永磁电机的定子结构，包括内定子和外定子；内定子包括内定子铁芯和内定子绕组，外定子包括外定子铁芯和外定子绕组；内定子铁芯安装于电机转子的副轴上，外定子铁芯安装于电机外壳的内壁上，内定子铁芯与外定子铁芯上的绕线齿槽数相同，内定子绕组与外定子绕组的绕线方式相同，内定子绕组与外定子绕组的绕线相位相差180度。本方案的定子结构，采用的是分数槽，单双层混合式集中绕组，这种绕组的有益效果是降低电机的齿槽转矩，提高电机的输出转矩，减少铜线的使用量，降低绕组的电阻，降低电机的铜损，降低电机的温升。

Description

一种永磁电机的定子结构 技术领域
本发明涉及永磁电机技术领域，具体为一种永磁电机的定子结构。
背景技术
随着电机技术和永磁材料的发展，永磁电机以其高效率、高功率密度、高功率因数等优势，在电动机系统中得到了广泛的应用。现阶段的永磁电机都是使用一个定子来驱动电机转子旋转的，这就限制了电机的效率以及功率密度。
发明内容
本发明主要是提供一种永磁电机的定子结构，解决现有技术采用一个定子来驱动电机转子旋转的，限制了电机的效率以及功率密度的问题。
为了解决上述技术问题，本发明采用如下技术方案：
一种永磁电机的定子结构，包括由内向外依次同轴套设的内定子和外定子；所述内定子包括内定子铁芯，以及设置于所述内定子铁芯上的内定子绕组，所述外定子包括外定子铁芯，以及设置于所述外定子铁芯上的外定子绕组；所述内定子铁芯安装于电机转子的副轴上，所述外定子铁芯安装于电机外壳的内壁上，所述内定子铁芯与外定子铁芯上的绕线齿槽数相同，所述内定子绕组与外定子绕组的绕线方式相同，所述内定子绕组与外定子绕组的绕线相位相差180度。
进一步，所述外定子与转子外层磁极形成电机的外气隙磁场，所述内定子与转子内层磁极形成电机的内气隙磁场。
进一步，所述内定子铁芯与所述外定子铁芯均由硅钢片叠装而成。
有益效果：本方案的定子结构，采用的是分数槽，单双层混合式集中绕 组，这种绕组的有益效果是降低电机的齿槽转矩，提高电机的输出转矩，减少铜线的使用量，降低绕组的电阻，降低电机的铜损，降低电机的温升。
附图说明
图1为本实施例的定子结构半剖示意图；
图2为本实施例的定子绕组分布图；
图3为本实施例的定子结构安装示意图；
附图标记：内定子铁芯1、外定子铁芯2、副轴3、电机外壳4、绕线齿槽5。
具体实施方式
以下将结合实施例对本发明涉及的一种永磁电机的定子结构技术方案进一步详细说明。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”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，可以具体情况理解上述术语在本发明中的具体含义。
如图1、图2、图3所示，本实施例的一种永磁电机的定子结构，包括由内向外依次同轴套设的内定子和外定子；所述内定子包括内定子铁芯1，以及设置于所述内定子铁芯1上的内定子绕组，所述外定子包括外定子铁芯2，以及设置于所述外定子铁芯2上的外定子绕组；所述内定子铁芯1安装于电机转子的副轴3上，所述外定子铁芯2安装于电机外壳4的内壁上，所述内定子铁芯1与外定子铁芯2上的绕线齿槽5数相同，所述内定子绕组与外定子绕组的绕线方式相同，所述内定子绕组与外定子绕组的绕线相位相差180度。 所述外定子与转子外层磁极形成电机的外气隙磁场，所述内定子与转子内层磁极形成电机的内气隙磁场。所述内定子铁芯1与所述外定子铁芯2均由硅钢片叠装而成。
本方案的定子结构，采用的是分数槽，单双层混合式集中绕组，这种绕组的有益效果是降低电机的齿槽转矩，提高电机的输出转矩，减少铜线的使用量，降低绕组的电阻，降低电机的铜损，降低电机的温升。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。

Claims (3)

  1. 一种永磁电机的定子结构，其特征在于：包括由内向外依次同轴套设的内定子和外定子；所述内定子包括内定子铁芯，以及设置于所述内定子铁芯上的内定子绕组，所述外定子包括外定子铁芯，以及设置于所述外定子铁芯上的外定子绕组；所述内定子铁芯安装于电机转子的副轴上，所述外定子铁芯安装于电机外壳的内壁上，所述内定子铁芯与外定子铁芯上的绕线齿槽数相同，所述内定子绕组与外定子绕组的绕线方式相同，所述内定子绕组与外定子绕组的绕线相位相差180度。
  2. 根据权利要求1所述的一种永磁电机的定子结构，其特征在于：所述外定子与转子外层磁极形成电机的外气隙磁场，所述内定子与转子内层磁极形成电机的内气隙磁场。
  3. 根据权利要求1所述的一种永磁电机的定子结构，其特征在于：所述内定子铁芯与所述外定子铁芯均由硅钢片叠装而成。
PCT/CN2020/071225 2019-12-09 2020-01-09 一种永磁电机的定子结构 WO2021114453A1 (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080169720A1 (en) * 2005-05-23 2008-07-17 Marko Petek Synchronous Electromechanical Transformer
CN104022609A (zh) * 2014-06-11 2014-09-03 嘉兴学院 新型双定子低脉动转矩步进电动机
CN105914978A (zh) * 2016-04-18 2016-08-31 合肥工业大学 一种双定子无刷双馈电机
CN107492998A (zh) * 2017-07-31 2017-12-19 湖北江鹏新能源汽车科技有限公司 双定子永磁同步电动机
CN108390529A (zh) * 2018-03-21 2018-08-10 哈尔滨工业大学 双定子永磁同步电机

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080169720A1 (en) * 2005-05-23 2008-07-17 Marko Petek Synchronous Electromechanical Transformer
CN104022609A (zh) * 2014-06-11 2014-09-03 嘉兴学院 新型双定子低脉动转矩步进电动机
CN105914978A (zh) * 2016-04-18 2016-08-31 合肥工业大学 一种双定子无刷双馈电机
CN107492998A (zh) * 2017-07-31 2017-12-19 湖北江鹏新能源汽车科技有限公司 双定子永磁同步电动机
CN108390529A (zh) * 2018-03-21 2018-08-10 哈尔滨工业大学 双定子永磁同步电机

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