WO2021114451A1 - 一种永磁电机的散热结构 - Google Patents

一种永磁电机的散热结构 Download PDF

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Publication number
WO2021114451A1
WO2021114451A1 PCT/CN2020/071216 CN2020071216W WO2021114451A1 WO 2021114451 A1 WO2021114451 A1 WO 2021114451A1 CN 2020071216 W CN2020071216 W CN 2020071216W WO 2021114451 A1 WO2021114451 A1 WO 2021114451A1
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WIPO (PCT)
Prior art keywords
stator
motor
heat dissipation
air
permanent magnet
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PCT/CN2020/071216
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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 WO2021114451A1 publication Critical patent/WO2021114451A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • 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
    • 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
    • H02K1/32—Rotating 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

Definitions

  • the invention relates to the technical field of permanent magnet motors, in particular to a heat dissipation structure of permanent magnet motors.
  • stator windings In the industrial field at this stage, motors usually use external heat dissipation to cool the stator windings.
  • the heat of the stator windings must be conducted through the stator core to the motor housing for heat dissipation.
  • the current density of the stator windings is only 6A to 7A, which limits the motor windings. The current density.
  • the invention mainly provides a heat dissipation structure of a permanent magnet motor, which solves the problem of the unreasonable heat dissipation structure of the prior art and limits the current density of the motor winding.
  • the present invention adopts the following technical solutions:
  • a heat dissipation structure of a permanent magnet motor includes a motor housing, a stator structure, and a rotor structure, and includes an air storage cavity, an exhaust cavity, an air duct, an air intake end and an exhaust end; the air storage cavity is arranged on the bearing of the motor Between the seat and the first end cover, the exhaust cavity is provided between the stator structure and the second end cover; a number of the air passages are distributed on the bearing seat and between the stator structure and the rotor structure On the front end cover, the air inlet end is arranged on the motor housing corresponding to the position of the air storage cavity, and the air outlet end is arranged on the motor housing corresponding to the position of the exhaust cavity.
  • the stator structure includes an inner stator and an outer stator; the inner stator is arranged on the fixed shaft of the motor, the outer stator is arranged on the inner wall of the motor housing, and the air passage is arranged on the inner stator .
  • impeller which is arranged on a rotating shaft in the gas storage cavity.
  • an air filter element is installed at the air inlet end.
  • a one-way exhaust valve is installed at the exhaust end.
  • the heat dissipation structure of the motor of this scheme uses airflow to directly cool the stator structure and rotor structure of the motor.
  • This cooling method can effectively reduce the temperature rise of the motor winding and the rotor structure, and increase the current density of the stator winding to 14A to 20A , To reduce the amount of copper wire used in the stator winding.
  • FIG. 1 is a schematic diagram of the heat dissipation structure of this embodiment
  • motor housing 1 air storage cavity 2, exhaust cavity 3, air duct 4, intake end 5, exhaust end 6, first end cover 7, second end cover 8, bearing seat 9, front end cover 10.
  • the heat dissipation structure of a permanent magnet motor of this embodiment includes a motor housing 1, a stator structure and a rotor structure, and includes an air storage cavity 2, an exhaust cavity 3, an air duct 4, and an intake end 5.
  • the exhaust end 6; the air storage cavity 2 is provided between the bearing housing 9 of the motor and the first end cover 7, and the exhaust cavity 3 is provided between the stator structure and the second end cover 8;
  • the air passages 4 are distributed on the bearing housing 9 and the front end cover 10 of the stator structure and the rotor structure, and the air inlet end 5 is arranged on the motor housing 1 corresponding to the position of the air storage cavity 2
  • the exhaust end 6 is arranged on the motor housing 1 corresponding to the position of the exhaust cavity 3.
  • the stator structure includes an inner stator 16 and an outer stator 17; the inner stator 16 is arranged on the fixed shaft 11 of the motor, the outer stator 17 is arranged on the inner wall of the motor housing 1, and the air passage 4 is arranged on The inner stator 16 is on. It also includes an impeller 12, which is arranged on a rotating shaft 13 in the air storage cavity 2. An air filter element 14 is installed at the intake end 5. A one-way exhaust valve 15 is installed at the exhaust end 6.
  • the heat dissipation structure of the motor in this scheme uses airflow to directly cool the stator structure and rotor structure of the motor.
  • This cooling method can effectively reduce the temperature rise of the stator winding and the rotor structure, increase the current density of the stator winding to 14A to 20A, and reduce the stator The amount of winding copper wire used.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (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散热结构，包括电机外壳、定子结构和转子结构，以及包括蓄气腔、排气腔、通气道、进气端和排气端。本方案的电机的散热结构，采用气流直接冷却电机的定子结构及转子结构，这种冷却方式可以有效降低电机绕组与转子结构的温升，将定子绕组的电流密度提高到14A至20A，减少定子绕组铜线的使用量。

Description

一种永磁电机的散热结构 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散热结构。
背景技术
现阶段的工业领域，电机通常采用从外部散热的方式来冷却定子绕组，定子绕组的热量必须通过定子铁芯传导至电机外壳散热，定子绕组的电流密度只有6A至7A，这就限制了电机绕组的电流密度。
发明内容
本发明主要是提供一种永磁电机的散热结构，解决现有技术散热结构不合理，限制了电机绕组的电流密度问题。
为了解决上述技术问题，本发明采用如下技术方案：
一种永磁电机的散热结构，包括电机外壳、定子结构和转子结构，以及包括蓄气腔、排气腔、通气道、进气端和排气端；所述蓄气腔设置于电机的轴承座与第一端盖之间，所述排气腔设置于所述定子结构与第二端盖之间；若干所述通气道分布于所述轴承座以及所述定子结构与所述转子结构的前端盖上，所述进气端对应所述蓄气腔位置设置于所述电机外壳上，所述排气端对应所述排气腔位置设置于所述电机外壳上。
进一步，所述定子结构包括内定子和外定子；所述内定子设置于电机的固定轴上，所述外定子设置于所述电机外壳的内壁上，所述通气道设置于所述内定子上。
进一步，还包括叶轮，所述叶轮设置于所述蓄气腔内的转轴上。
进一步，所述进气端安装有空气滤芯。
进一步，所述排气端安装有单向排气阀。
有益效果：本方案的电机的散热结构，采用气流直接冷却电机的定子结构及转子结构，这种冷却方式可以有效降低电机绕组与转子结构的温升，将定子绕组的电流密度提高到14A至20A，减少定子绕组铜线的使用量。
附图说明
图1为本实施例的散热结构示意图；
附图标记：电机外壳1、蓄气腔2、排气腔3、通气道4、进气端5、排气端6、第一端盖7、第二端盖8、轴承座9、前端盖10、固定轴11、叶轮12、转轴13、空气滤芯14、单向排气阀15、内定子16、外定子17。
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散热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所示，本实施例的一种永磁电机的散热结构，包括电机外壳1、定子结构和转子结构，以及包括蓄气腔2、排气腔3、通气道4、进气端5和排气端6；所述蓄气腔2设置于电机的轴承座9与第一端盖7之间，所述排气腔3设置于所述定子结构与第二端盖8之间；若干所述通气道4分布于所述轴承座9以及所述定子结构与所述转子结构的前端盖10上，所述进气端5对应所述蓄气腔2位置设置于所述电机外壳1上，所述排气端6对应所述排气腔3位置设置于所述电机外壳1上。所述定子结构包括内定子16和外定子17；所 述内定子16设置于电机的固定轴11上，所述外定子17设置于所述电机外壳1的内壁上，所述通气道4设置于所述内定子16上。还包括叶轮12，所述叶轮12设置于所述蓄气腔2内的转轴13上。所述进气端5安装有空气滤芯14。所述排气端6安装有单向排气阀15。
使用时，空气从进气端5进入蓄气腔2内，通过空气滤芯14对进入的气体进行过滤排除杂质，随后由叶轮12将空气加压形成气流，加压气流经过设置于轴承座9、定子结构和转子结构的前端盖10上的通气道4对电机的内部结构进行散热处理，最后通过单向排气阀15从排气端6排除。在散热冷却的过程中，气流还能够从转子结构与定子结构的空隙中流过，加强散热效果。增加空气虑芯及单向阀的目的是保证电机的防护等级达到要求。图1中的箭头方向代表气流方向。
本方案的电机的散热结构，采用气流直接冷却电机的定子结构及转子结构，这种冷却方式可以有效降低定子绕组与转子结构的温升，将定子绕组的电流密度提高到14A至20A，减少定子绕组铜线的使用量。
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 (5)

  1. 一种永磁电机的散热结构，包括电机外壳、定子结构和转子结构，其特征在于：包括蓄气腔、排气腔、通气道、进气端和排气端；所述蓄气腔设置于电机的轴承座与第一端盖之间，所述排气腔设置于所述定子结构与第二端盖之间；若干所述通气道分布于所述轴承座以及所述定子结构与所述转子结构的前端盖上，所述进气端对应所述蓄气腔位置设置于所述电机外壳上，所述排气端对应所述排气腔位置设置于所述电机外壳上。
  2. 根据权利要求1所述的一种永磁电机的散热结构，其特征在于：所述定子结构包括内定子和外定子；所述内定子设置于电机的固定轴上，所述外定子设置于所述电机外壳的内壁上，所述通气道设置于所述内定子上。
  3. 根据权利要求1所述的一种永磁电机的散热结构，其特征在于：还包括叶轮，所述叶轮设置于所述蓄气腔内的转轴上。
  4. 根据权利要求1所述的一种永磁电机的散热结构，其特征在于：所述进气端安装有空气滤芯。
  5. 根据权利要求1所述的一种永磁电机的散热结构，其特征在于：所述排气端安装有单向排气阀。
PCT/CN2020/071216 2019-12-09 2020-01-09 一种永磁电机的散热结构 WO2021114451A1 (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010288392A (ja) * 2009-06-12 2010-12-24 Toshiba Mitsubishi-Electric Industrial System Corp 回転電機冷却機構および回転電機
CN202076892U (zh) * 2011-01-24 2011-12-14 王建排 一种电动机散热装置
CN203722411U (zh) * 2013-12-23 2014-07-16 上海大郡动力控制技术有限公司 用于新能源汽车的内外双风冷电机
CN106549536A (zh) * 2015-09-23 2017-03-29 罗伯特·博世有限公司 电动机
EP3200327A1 (de) * 2016-01-29 2017-08-02 Traktionssysteme Austria GmbH Luftgekühlte elektrische maschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010288392A (ja) * 2009-06-12 2010-12-24 Toshiba Mitsubishi-Electric Industrial System Corp 回転電機冷却機構および回転電機
CN202076892U (zh) * 2011-01-24 2011-12-14 王建排 一种电动机散热装置
CN203722411U (zh) * 2013-12-23 2014-07-16 上海大郡动力控制技术有限公司 用于新能源汽车的内外双风冷电机
CN106549536A (zh) * 2015-09-23 2017-03-29 罗伯特·博世有限公司 电动机
EP3200327A1 (de) * 2016-01-29 2017-08-02 Traktionssysteme Austria GmbH Luftgekühlte elektrische maschine

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