WO2018054225A1

WO2018054225A1 - Cooling device for reducing temperature of permanent magnet in permanent magnet motor

Info

Publication number: WO2018054225A1
Application number: PCT/CN2017/100873
Authority: WO
Inventors: 李伟力; 曹钊滨; 李金阳; 李栋; 张晓晨; 曹君慈; 沈稼丰; 程鹏
Original assignee: 北京交通大学
Priority date: 2016-09-20
Filing date: 2017-09-07
Publication date: 2018-03-29
Also published as: RU2728758C1; CN106340981A; CN106340981B

Abstract

A cooling device for reducing the temperature of a permanent magnet in a permanent magnet motor. The device comprises a motor stator, a motor rotor, and a rotating shaft (13). The motor stator comprises a stator core (1), a stator winding (2), stator axial ventilation grooves (3), and a stator radial ventilation groove (4). The motor rotor comprises a rotor core (6), a rotor radial ventilation groove (12), starting cage bars (7), permanent magnet steels (8), a magnetic isolating ring (9), photo-frame-type derivative slot wedges (10), and slot wedge axial ventilation holes (11). The stator core (1) is axially provided with the stator radial ventilation groove (4), and is provided with the stator axial ventilation grooves (3) along the circumference. The rotor core (6) is axially provided with the rotor radial ventilation groove (12). The photo-frame-type derivative slot wedges (10) are provided with the slot wedge axial ventilation holes (11). The rotating shaft (13) is provided with an axial-flow fan (14). Under the action of an axial-flow fan (14) or a centrifugal fan, a photo-frame-type derivative cooling structure for reducing the temperature of a permanent magnet in a permanent magnet motor can effectively reduce the temperatures of a stator core and a rotor core, and in particular, the temperature of the permanent magnet in a rotor, thereby improving the cooling efficiency of the motor.

Description

一种降氐永磁电机中永磁体温度的冷却装置技术领域 Cooling device for lowering permanent magnet temperature in permanent magnet motor

[0001] 本发明涉及永磁电机技术领域，尤其涉及一种降低永磁电机中永磁体温度的冷却装置。 [0001] The present invention relates to the field of permanent magnet motor technology, and more particularly to a cooling device for reducing the temperature of a permanent magnet in a permanent magnet motor.

背景技术 Background technique

[0002] 永磁电机，特别是实心转子永磁电机，在运行的过程中，气隙磁场内存在大量谐波，在转子永磁体内会产生大量涡流损耗，同吋永磁电机的功率密度高，电机体积小，散热条件相对较差，使用环境温度变化大，使得电机内永磁体存在不可逆退磁风险，导致永磁电机的性能下降，甚至完全失去驱动能力。 [0002] Permanent magnet motors, especially solid rotor permanent magnet motors, have a large number of harmonics in the air gap magnetic field during operation, and a large amount of eddy current loss occurs in the rotor permanent magnets, and the power density of the permanent magnet motor is high. The motor is small in size, the heat dissipation condition is relatively poor, and the ambient temperature changes greatly, which causes the permanent magnet in the motor to have an irreversible demagnetization risk, resulting in a decrease in the performance of the permanent magnet motor or even completely losing the driving capability.

[0003] 因此，如何有效抑制电机温度，降低永磁体温度，成为目前研究的重点。 [0003] Therefore, how to effectively suppress the motor temperature and reduce the temperature of the permanent magnet has become the focus of current research.

技术问题 technical problem

[0004] 本发明的实施例提供了一种降低永磁电机中永磁体温度的冷却装置，以实现有效地降低永磁电机中永磁体温度。 Embodiments of the present invention provide a cooling device that reduces the temperature of a permanent magnet in a permanent magnet motor to effectively reduce the temperature of a permanent magnet in a permanent magnet motor.

问题的解决方案 Problem solution

技术解决方案 Technical solution

[0005] 为了实现上述目的，本发明采取了如下技术方案。 In order to achieve the above object, the present invention adopts the following technical solutions.

[0006] 一种降低永磁电机中永磁体温度的冷却装置，包括： [0006] A cooling device for reducing the temperature of a permanent magnet in a permanent magnet motor, comprising:

[0007] 电机定子、电机转子，所述电机定子安装在所述电机转子的外部，所述电机定子包括定子铁芯、定子绕组、定子轴向通风沟、定子径向通风沟，所述电机转子包括转子铁芯、转子径向通风沟、起动笼条、永磁磁钢、隔磁环、槽楔、槽楔轴向通风孔。 [0007] a motor stator, a motor rotor, the motor stator is mounted outside the motor rotor, the motor stator includes a stator core, a stator winding, a stator axial ventilation groove, a stator radial ventilation groove, and the motor rotor Including rotor core, rotor radial ventilation groove, starting cage, permanent magnet steel, magnetic isolation ring, wedge, slot wedge axial ventilation hole.

[0008] 进一步地，所述定子铁芯沿轴向幵有 N个定子径向通风沟，沿周向幵有 N个的定子轴向通风沟；所述转子铁芯上幵有转子径向通风沟。 [0008] Further, the stator core has N stator radial ventilation grooves in the axial direction, and N stator axial ventilation grooves in the circumferential direction; the rotor core has a rotor radial ventilation groove.

[0009] 进一步地，所述转子铁芯中嵌放有所述起动笼条和所述槽楔，所述槽楔上幵有槽楔轴向通风孔。 [0009] Further, the starting cage strip and the slot wedge are embedded in the rotor core, and the slot wedge has a slot wedge axial venting hole.

[0010] 进一步地，所述槽楔为相框式结构或梯形结构或倒 T型结构，永磁磁钢嵌入所述槽楔；所述槽楔材料为不导磁不导电材料。 [0010] Further, the slot wedge is a frame structure or a trapezoidal structure or an inverted T structure, and the permanent magnet magnetic steel embedded system The groove wedge material; the groove wedge material is a non-magnetic non-conductive material.

[0011] 进- 步地，所述的转子径向通风沟与定子径向通风沟在径向一一对应。 [0011] Further, the rotor radial ventilation groove and the stator radial ventilation groove have a one-to-one correspondence in the radial direction.

[0012] 进- 步地，所述槽楔为空腔结构； [0012] further, the slot wedge is a cavity structure;

[0013] 进- 步地，所述转子铁芯的两端设置有转子压板； [0013] further, the rotor core is provided with a rotor pressure plate at both ends thereof;

[0014] 进- 步地，所述转子压板留有与所述槽楔轴向通风孔大小匹配的通风孔。 [0014] Further, the rotor pressure plate is provided with a venting hole that matches the size of the axial venting hole of the wedge.

[0015] 进- 步地，在所述电机转子的内部空腔中设置转轴，所述转轴上带有轴流式风扇。 [0015] Further, a rotating shaft is disposed in an internal cavity of the rotor of the motor, and the rotating shaft has an axial fan.

[0016] 由上述本发明的实施例提供的技术方案可以看出，本发明实施例提供的降低永磁电机中永磁体温度的冷却装置在轴流风扇或离心风扇作用下，可以有效地降低定转子铁芯和永磁体的温度，提高电机的冷却效率。 [0016] It can be seen from the technical solutions provided by the embodiments of the present invention that the cooling device for reducing the temperature of the permanent magnet in the permanent magnet motor can effectively reduce the cooling device under the action of the axial fan or the centrifugal fan. The temperature of the rotor core and the permanent magnet increases the cooling efficiency of the motor.

[0017] 本发明附加的方面和优点将在下面的描述中部分给出，这些将从下面的描述中变得明显，或通过本发明的实践了解到。 [0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows.

发明的有益效果 Advantageous effects of the invention

有益效果 Beneficial effect

[0018] 本发明实施例提供的降低永磁电机中永磁体温度的冷却装置在轴流风扇或离心风扇作用下，可以有效地降低定转子铁芯和永磁体的温度，提高电机的冷却效率。 [0018] The cooling device for reducing the temperature of the permanent magnet in the permanent magnet motor provided by the embodiment of the invention can effectively reduce the temperature of the stator core and the permanent magnet under the action of the axial fan or the centrifugal fan, and improve the cooling efficiency of the motor.

[0019] 本发明实施例提供的降低永磁电机中永磁体温度的冷却装置在保证电机起动与运行性能的前提下，通过改变电机风路结构，抑制电机温度，提高了电机的工作可靠性。 [0019] The cooling device for reducing the temperature of the permanent magnet in the permanent magnet motor provided by the embodiment of the present invention improves the working reliability of the motor by changing the wind path structure of the motor and suppressing the temperature of the motor under the premise of ensuring the starting and running performance of the motor.

对附图的简要说明 Brief description of the drawing

附图说明 DRAWINGS

[0020] 为了更清楚地说明本发明实施例的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。 [0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some implementations of the present invention. For example, other drawings may be obtained from those skilled in the art without any inventive labor.

[0021] 图 1为本发明实施例提供的一种降低永磁电机中永磁体温度的冷却装置的结构示意图； [0022] 图 2为本发明实施例提供的一种降低永磁电机中永磁体温度的冷却装置通风示意图； 1 is a schematic structural diagram of a cooling device for reducing the temperature of a permanent magnet in a permanent magnet motor according to an embodiment of the present invention; 2 is a schematic diagram of ventilation of a cooling device for reducing the temperature of a permanent magnet in a permanent magnet motor according to an embodiment of the present invention;

[0023] 图 3为本发明实施例提供的一种降低永磁电机中永磁体温度的冷却装置中转子槽楔衍生示意图； 3 is a schematic diagram of a rotor wedge derivative in a cooling device for reducing the temperature of a permanent magnet in a permanent magnet motor according to an embodiment of the present invention;

[0024] 图 4为本发明实施例提供的一种降低永磁电机中永磁体温度的冷却装置中转子槽楔衍生示意图； 4 is a schematic diagram of a rotor wedge derivative in a cooling device for reducing the temperature of a permanent magnet in a permanent magnet motor according to an embodiment of the present invention;

[0025] 图 5为本发明实施例提供的一种降低永磁电机中永磁体温度的冷却装置中转子槽楔衍生示意图； [0025] FIG. 5 is a schematic diagram of a rotor wedge derivative in a cooling device for reducing the temperature of a permanent magnet in a permanent magnet motor according to an embodiment of the present invention;

[0026] 图中：定子铁芯 1、定子绕组 2、定子轴向通风沟 3、定子径向通风沟 4、气隙 5 、转子铁芯 6、起动笼条 7、永磁磁钢 8、隔磁环 9、槽楔 10、槽楔轴向通风孔 11 、转子径向通风沟 12、转轴 13、轴流风扇 14。 [0026] In the figure: stator core 1, stator winding 2, stator axial ventilation groove 3, stator radial ventilation groove 4, air gap 5, rotor core 6, starting cage 7, permanent magnet steel 8, partition The magnetic ring 9, the wedge 10, the wedge axial vent 11 , the rotor radial vent 12, the rotating shaft 13, and the axial fan 14.

实施该发明的最佳实施例 BEST MODE FOR CARRYING OUT THE INVENTION

本发明的最佳实施方式 BEST MODE FOR CARRYING OUT THE INVENTION

[0027] 在此处键入本发明的最佳实施方式描述段落。 [0027] The paragraphs describing the best mode of the invention are entered here.

本发明的实施方式 Embodiments of the invention

[0028] 下面详细描述本发明的实施方式，所述实施方式的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件 The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions.

。下面通过参考附图描述的实施方式是示例性的，仅用于解释本发明，而不能解释为对本发明的限制。 . The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

[0029] 本技术领域技术人员可以理解，除非特意声明，这里使用的单数形式"一"、 " 一个"、 "所述 "和"该"也可包括复数形式。应该进一步理解的是，本发明的说明书中使用的措辞"包括"是指存在所述特征、整数、步骤、操作、元件和 /或组件，但是并不排除存在或添加一个或多个其他特征、整数、步骤、操作、元件、组件和 /或它们的组。应该理解，当我们称元件被"连接"或"耦接"到另一元件吋，它可以直接连接或耦接到其他元件，或者也可以存在中间元件。此外，这里使用的"连接"或"耦接"可以包括无线连接或耦接。这里使用的措辞 "和 /或"包括一个或更多个相关联的列出项的任一单元和全部组合。 [0030] 本技术领域技术人员可以理解，除非另外定义，这里使用的所有术语（包括技术术语和科学术语）具有与本发明所属领域中的普通技术人员的一般理解相同的意义。还应该理解的是，诸如通用字典中定义的那些术语应该被理解为具有与现有技术的上下文中的意义一致的意义，并且除非像这里一样定义，不会用理想化或过于正式的含义来解释。 [0029] The singular forms "a", "an", "the" It will be further understood that the phrase "comprising", used in the <RTI ID=0.0></RTI><RTIgt;</RTI><RTIgt;</RTI><RTIgt;</RTI> is intended to mean the presence of the features, integers, steps, operations, components and/or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, components, components, and/or their groups. It will be understood that when we refer to an element being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or an intermediate element can be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. The phrase "and/or" used herein includes any and all combinations of one or more of the associated listed. [0030] Those skilled in the art will appreciate that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention belongs, unless otherwise defined. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and unless defined as herein, will not be idealized or overly formal. Explanation.

[0031] 为便于对本发明实施例的理解，下面将结合附图以几个具体实施例为例做进一步的解释说明，且各个实施例并不构成对本发明实施例的限定。 [0031] In order to facilitate the understanding of the embodiments of the present invention, the following detailed description of the embodiments of the invention,

[0032] 本发明提供一种降低永磁电机中永磁体温度的冷却装置，在保证电机起动与运行性能的前提下，通过改变电机风路结构，抑制电机温度，提高了电机的工作可靠性。 [0032] The present invention provides a cooling device for reducing the temperature of a permanent magnet in a permanent magnet motor. Under the premise of ensuring the starting and running performance of the motor, the motor wind circuit structure is changed, the motor temperature is suppressed, and the working reliability of the motor is improved.

[0033] 本发明实施例提供的一种降低永磁电机中永磁体温度的冷却装置包括电机定子、电机转子，所述电机定子安装在所述电机转子的外部。所述电机定子包括定子铁芯、定子绕组、定子轴向通风沟、定子径向通风沟；所述电机转子包括转子铁芯、转子径向通风沟、起动笼条、永磁磁钢、隔磁环、槽楔、槽楔轴向通风孔。 [0033] A cooling device for reducing the temperature of a permanent magnet in a permanent magnet motor according to an embodiment of the present invention includes a motor stator and a motor rotor, and the motor stator is mounted outside the rotor of the motor. The motor stator includes a stator core, a stator winding, a stator axial ventilation groove, and a stator radial ventilation groove; the motor rotor includes a rotor core, a rotor radial ventilation groove, a starting cage strip, a permanent magnet magnet, and a magnetic isolation Ring, wedge, and wedge axial vents.

[0034] 所述定子铁芯沿轴向幵有 N个定子径向通风沟，沿周向幵有 N个定子轴向通风沟；所述转子铁芯上幵有转子径向通风沟；所述槽楔上幵有槽楔轴向通风孔。 [0034] the stator core has N stator radial ventilation grooves in the axial direction, N stator axial ventilation grooves in the circumferential direction; the rotor core has a rotor radial ventilation groove; the groove wedge The upper jaw has a slotted axial vent.

[0035] 所述槽楔为相框式结构或倒 T型结构或梯形结构，永磁磁钢嵌入槽楔；所述槽楔材料为不导磁不导电材料。 [0035] The slot wedge is a frame structure or an inverted T-shaped structure or a trapezoidal structure, and the permanent magnet magnetic steel is embedded in the slot wedge; the slot wedge material is a non-magnetic non-conductive material.

[0036] 所述的转子径向通风沟与定子径向通风沟在径向一一对应。所述槽楔为空腔结构；转子铁芯的两端设置有转子压板。 [0036] The rotor radial ventilation groove and the stator radial ventilation groove have a one-to-one correspondence in the radial direction. The wedge is a cavity structure; rotor cores are disposed at both ends of the rotor core.

[0037] 所述转子压板留有与槽楔轴向通风孔大小匹配的通风孔。 [0037] The rotor pressure plate is provided with a venting hole that matches the size of the axial venting hole of the wedge.

[0038] 在所述电机转子的内部空腔中设置转轴，所述转轴上带有轴流式风扇。 [0038] A rotating shaft is disposed in an inner cavity of the motor rotor, and the rotating shaft has an axial fan.

[0039] 图 1为本发明实施例提供的一种降低永磁电机中永磁体温度的冷却装置的结构示意图，图 2为该装置的通风示意图。下面结合图 1、图 2说明本发明的实施方式，本发明实施例提供的一种降低永磁电机中永磁体温度的冷却装置包括定子铁芯 1、定子绕组 2、定子轴向通风沟 3、定子径向通风沟 4、气隙 5、转子铁芯 6、起动笼条 7、永磁磁钢 8、隔磁环 9、槽楔 10、槽楔轴向通风孔 11、转子径向通风孔 12、转轴 13、轴流风扇 14组成。其中，定子铁芯 1沿圆周幵有定子轴向通风沟 3，沿轴向幵有定子径向通风沟 4。结合图 1所示，转子铁芯 6中嵌放有起动笼条 7 、槽楔 10为相框式结构。槽楔 10中嵌放有永磁磁钢 8，槽楔 10幵有槽楔轴向通风孔 11、转子径向通风孔 12，槽楔 10为空腔结构。 1 is a schematic structural diagram of a cooling device for reducing the temperature of a permanent magnet in a permanent magnet motor according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of ventilation of the device. An embodiment of the present invention is described below with reference to FIG. 1 and FIG. 2 . A cooling device for reducing the temperature of a permanent magnet in a permanent magnet motor includes a stator core 1 , a stator winding 2 , and an axial axial venting groove 3 . Stator radial venting groove 4, air gap 5, rotor core 6, starting cage strip 7, permanent magnet steel 8, magnetic isolation ring 9, wedge 10, wedge axial venting hole 11, radial ventilation of the rotor The hole 12, the rotating shaft 13, and the axial fan 14 are composed. Wherein, the stator core 1 has a stator axial ventilation groove 3 along the circumference, and a stator radial ventilation groove 4 is axially arranged. As shown in FIG. 1, a rotor cage 7 is embedded in the rotor core 6, and the wedge 10 is a frame-like structure. A permanent magnet magnet 8 is embedded in the wedge 10, the wedge 10 has a wedge axial vent 11 and a rotor radial vent 12, and the wedge 10 has a cavity structure.

[0040] 结合图 2通风示意图所示，在轴流风扇 14的作用下，电机外部的冷却空气沿气隙 5、定子轴向通风沟 3、槽楔轴向通风孔 11进入电机内部。槽楔轴向通风孔 11 中的空气一部分沿着轴向到达电机轴伸端，另一部分在转子高速旋转离心力的作用下，进入定子径向通风沟 3和转子径向通风孔 12。 [0040] As shown in the ventilation diagram of FIG. 2, under the action of the axial flow fan 14, the cooling air outside the motor enters the inside of the motor along the air gap 5, the stator axial ventilation groove 3, and the wedge axial vent hole 11. A part of the air in the axial vent 11 of the wedge reaches the extension end of the motor shaft in the axial direction, and the other part enters the radial venting groove 3 of the stator and the radial venting hole 12 of the rotor under the action of the centrifugal force of the high-speed rotation of the rotor.

[0041] 上述降低永磁电机中永磁体温度的冷却装置充分利用轴径向通风结构降低电机温度，特别是相框式槽楔中空式结构，可以隔离转子铁芯向永磁磁钢传热，将永磁磁钢表面的热量通过相框式槽楔的轴径向通风孔带走，有效降低永磁磁钢的温度。 [0041] The above cooling device for reducing the temperature of the permanent magnet in the permanent magnet motor fully utilizes the radial radial ventilation structure to reduce the motor temperature, in particular, the frame type wedge-wound hollow structure, which can isolate the rotor core from transferring heat to the permanent magnet magnetic steel, The heat of the surface of the permanent magnet steel is taken away by the radial vent of the frame of the frame wedge, which effectively reduces the temperature of the permanent magnet.

[0042] 图 3、图 4和图 5为本发明实施例提供的一种降低永磁电机中永磁体温度的相框式衍生冷却装置，工作原理与图 1所示的装置相似。 3, FIG. 4 and FIG. 5 are schematic diagrams of a photo frame type derivation cooling device for reducing the temperature of a permanent magnet in a permanent magnet motor according to an embodiment of the present invention, and the working principle is similar to the device shown in FIG.

[0043] 图 3、图 4、图 5所示的装置和图 1所示的装置的区别主要在于槽楔 10结构不同，图 1中槽楔 10为相框式结构，相框式结构槽楔内部带有槽楔轴向通风沟；图 3中槽楔 10为梯形结构，槽楔底部宽度与永磁体同宽；图 4中槽楔 10为梯形结构，槽楔底部宽度大于永磁体宽度；图 5中槽楔 10为倒 T型结构，槽楔内部带有槽楔轴向通风沟。 [0043] The difference between the device shown in FIG. 3, FIG. 4, and FIG. 5 and the device shown in FIG. 1 is mainly that the structure of the wedge 10 is different. The wedge 10 in FIG. 1 is a frame structure, and the frame-shaped structure has a groove inner band. In Fig. 3, the wedge 10 is a trapezoidal structure, and the width of the bottom of the wedge is the same as that of the permanent magnet; in Fig. 4, the wedge 10 is a trapezoidal structure, and the width of the bottom of the wedge is larger than the width of the permanent magnet; The wedge 10 is an inverted T-shaped structure, and the inside of the wedge has a groove axial axial ventilation groove.

[0044] 综上所述，本发明实施例提供的降低永磁电机中永磁体温度的冷却装置在轴流风扇或离心风扇作用下，可以有效地降低定转子铁芯和永磁体的温度，提高电机的冷却效率。 [0044] In summary, the cooling device for reducing the temperature of the permanent magnet in the permanent magnet motor according to the embodiment of the present invention can effectively reduce the temperature of the stator core and the permanent magnet under the action of the axial fan or the centrifugal fan, thereby improving the temperature of the stator core and the permanent magnet. The cooling efficiency of the motor.

[0045] 本发明实施例提供的降低永磁电机中永磁体温度的冷却装置在保证电机起动与运行性能的前提下，通过改变电机风路结构，抑制电机温度，提高了电机的工作可靠性。 [0045] The cooling device for reducing the temperature of the permanent magnet in the permanent magnet motor provided by the embodiment of the present invention improves the working reliability of the motor by changing the wind path structure of the motor and suppressing the temperature of the motor under the premise of ensuring the starting and running performance of the motor.

[0046] 本领域普通技术人员可以理解：附图只是一个实施例的示意图，附图中的模块或流程并不一定是实施本发明所必须的。 It will be understood by those of ordinary skill in the art that the drawings are only a schematic representation of one embodiment, and the modules or processes in the drawings are not necessarily required to practice the invention.

[0047] 本领域普通技术人员可以理解：实施例中的装置中的部件可以按照实施例描述分布于实施例的装置中，也可以进行相应变化位于不同于本实施例的一个或多个装置中。上述实施例的部件可以合并为一个部件，也可以进一步拆分成多个子部件。 [0047] Those skilled in the art can understand that the components in the device in the embodiment can be described in accordance with an embodiment. Distributed in the apparatus of the embodiment, it is also possible to make corresponding changes in one or more of the devices different from the embodiment. The components of the above embodiments may be combined into one component or may be further split into a plurality of subcomponents.

以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应该以权利要求的保护范围为准。 The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

权利要求书 Claim

一种降低永磁电机中永磁体温度的冷却装置，其特征在于，包括：电机定子、电机转子，所述电机定子安装在所述电机转子的外部，所述电机定子包括定子铁芯、定子绕组、定子轴向通风沟、定子径向通风沟，所述电机转子包括转子铁芯、转子径向通风沟、起动笼条、永磁磁钢、隔磁环、槽楔、槽楔轴向通风孔。 A cooling device for reducing the temperature of a permanent magnet in a permanent magnet motor, comprising: a motor stator and a motor rotor, wherein the motor stator is mounted outside the rotor of the motor, and the stator of the motor comprises a stator core and a stator winding The stator axial ventilation groove and the stator radial ventilation groove, the motor rotor includes a rotor core, a rotor radial ventilation groove, a starting cage strip, a permanent magnet magnet, a magnetic isolation ring, a wedge wedge, and a wedge axial axial ventilation hole .

根据权利要求 1所述的装置，其特征在于，所述定子铁芯沿轴向幵有 N个定子径向通风沟，沿周向幵有 N个的定子轴向通风沟；所述转子铁芯上幵有转子径向通风沟。 The device according to claim 1, wherein the stator core has N stator radial ventilation grooves in the axial direction, and N stator axial ventilation grooves in the circumferential direction; There is a rotor radial ventilation groove.

根据权利要求 1所述的装置，其特征在于，所述转子铁芯中嵌放有所述起动笼条和所述槽楔，所述槽楔上幵有槽楔轴向通风孔。 The device according to claim 1, wherein the starter cage and the wedge are embedded in the rotor core, and the wedge has an axial vent hole on the wedge.

根据权利要求 1所述的装置，其特征在于，所述槽楔为相框式结构或梯形结构或倒 T型结构，永磁磁钢嵌入所述槽楔；所述槽楔材料为不导磁不导电材料。 The device according to claim 1, wherein the slot wedge is a frame structure or a trapezoidal structure or an inverted T-shaped structure, and a permanent magnet magnetic steel is embedded in the slot wedge; the slot wedge material is non-magnetically Conductive material.

根据权利要求 2所述的装置，其特征在于，所述的转子径向通风沟与定子径向通风沟在径向一一对应。 The apparatus according to claim 2, wherein said rotor radial venting groove is in one-to-one correspondence with the stator radial venting groove.

根据权利要求 4所述的装置，其特征在于，所述槽楔为空腔结构；根据权利要求 2所述的装置，其特征在于，所述转子铁芯的两端设置有转子压板； The apparatus according to claim 4, wherein the slot wedge is a cavity structure; the apparatus according to claim 2, wherein both ends of the rotor core are provided with a rotor pressure plate;

根据权利要求 7所述的装置，其特征在于，所述转子压板留有与所述槽楔轴向通风孔大小匹配的通风孔。 The apparatus of claim 7 wherein said rotor platen retains a venting aperture that matches the axial venting aperture of said wedge.

根据权利要求 8所述的装置，其特征在于，在所述电机转子的内部空腔中设置转轴，所述转轴上带有轴流式风扇。 The apparatus according to claim 8, wherein a rotating shaft is provided in an internal cavity of the rotor of the motor, the rotating shaft having an axial fan.