WO2021036082A1 - Moteur à aimant permanent à structure de dissipation de chaleur - Google Patents

Moteur à aimant permanent à structure de dissipation de chaleur Download PDF

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Publication number
WO2021036082A1
WO2021036082A1 PCT/CN2019/123373 CN2019123373W WO2021036082A1 WO 2021036082 A1 WO2021036082 A1 WO 2021036082A1 CN 2019123373 W CN2019123373 W CN 2019123373W WO 2021036082 A1 WO2021036082 A1 WO 2021036082A1
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WO
WIPO (PCT)
Prior art keywords
heat dissipation
stator
cavity
permanent magnet
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/123373
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English (en)
Chinese (zh)
Inventor
王鑫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Shiyuan Electronics Thecnology Co Ltd
Original Assignee
Guangzhou Shiyuan Electronics Thecnology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangzhou Shiyuan Electronics Thecnology Co Ltd filed Critical Guangzhou Shiyuan Electronics Thecnology Co Ltd
Publication of WO2021036082A1 publication Critical patent/WO2021036082A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H02K1/20—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
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • 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
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing

Definitions

  • This application relates to the technical field of permanent magnet motors, and in particular to a permanent magnet motor with a heat dissipation structure.
  • the heat dissipation structure of the motor is of great significance to the reliability of the motor.
  • the heat sources of permanent magnet motors are mainly stators and stator coils. At present, the heat dissipation structure of permanent magnet motors mainly includes the following:
  • the external cooling device of the casing causes the structure of the entire motor to increase
  • the present application provides a permanent magnet motor with a heat dissipation structure to solve the technical problems of increased volume, low heat dissipation efficiency, and unsatisfactory heat dissipation effect due to the need for additional structures for heat dissipation of the motor.
  • the embodiment of the application provides a permanent magnet motor with a heat dissipation structure, which includes a casing, a rotor and a stator, the casing is enclosed with an inner cavity; the rotor includes a rotating shaft and a rotor body, the rotor body and the stator The stator is located in the inner cavity, the rotating shaft extends in the inner cavity and passes through the casing, the rotor body and/or the stator is provided with at least one heat dissipation cavity extending in the axial direction, The casing is provided with an opening, and the heat dissipation cavity forms a heat dissipation channel with the inner cavity and the opening.
  • a heat dissipation cavity is provided on the rotor and/or the stator.
  • the heat dissipation cavity can be opened only on the stator or only on the rotor as required, or preferably at the same time.
  • the stator and the rotor are provided with heat dissipation cavities to increase the heat dissipation area from the heat source itself, and an opening is provided on the casing.
  • the heat dissipation cavity and the inner cavity and the opening form a heat dissipation channel, which helps to remove the heat generated during operation. It dissipates heat, has high heat dissipation efficiency and good effect. Not only does it require no additional structure, it has a volume advantage, but also effectively reduces its own weight by opening the cavity and has a quality advantage.
  • the heat dissipation cavity is located at a position where the magnetic flux is relatively small in the magnetic field distribution on the rotor body and/or the stator.
  • the position setting of the heat dissipation cavity will not affect the magnetic circuit and the performance of the motor, and achieve the technical effect of increasing the heat dissipation effect of the motor and optimizing the quality of the motor under the premise of ensuring the performance of the motor.
  • the heat dissipation cavity includes a first heat dissipation cavity provided on the rotor body, and/or a second heat dissipation cavity provided on the stator, the first heat dissipation cavity is a through hole, and the second heat dissipation cavity is a through hole.
  • the heat dissipation cavity is a through slot located in the outer ring of the stator yoke.
  • the opening includes at least one first air inlet and at least one first air outlet, and the first air inlet is arranged on the middle shell of the casing and located in front of the stator.
  • An air outlet is arranged on the intermediate casing and located behind the stator.
  • the opening includes at least one first air inlet and at least one first air outlet, and the first air inlet is arranged on the middle shell of the casing and located behind the stator.
  • the first air outlet is arranged on the intermediate casing and located in front of the stator.
  • the first air inlet and the first air outlet may be one or more, preferably more than one, in order to achieve a better heat dissipation effect.
  • the casing further includes a front end cover and a rear end cover connected with the middle casing; the opening further includes at least one second air inlet penetrating the front end cover or the rear end cover.
  • the second air inlet may be one or multiple, preferably multiple, to achieve better heat dissipation effect.
  • the heat dissipation fan is a straight-blade fan, and the straight-blade fan is arranged between the stator and the front end cover or the rear end cover, and is connected to the second air inlet Relatively located.
  • the setting of the cooling fan further accelerates the air flow inside the permanent magnet motor casing and improves the heat dissipation efficiency.
  • the opening includes a third air inlet located at the front end cover of the cabinet and a second air outlet located at the rear end cover of the cabinet, respectively.
  • the heat dissipation fan is a curved blade fan, and the one curved blade fan is arranged in the inner cavity and located in front of or behind the stator; or the heat dissipation fan is two curved blades
  • the two curved-blade fans are arranged in the inner cavity and are respectively located in front of and behind the stator.
  • a heat dissipation cavity is opened at the stator and/or rotor, which increases the heat dissipation area from the heat source, and combines the openings opened on the casing as the air inlet and outlet to form an air inlet and outlet.
  • the heat dissipation cavity can be arranged on the rotor body and/or the stator at a position where the magnetic flux is small in the magnetic field distribution, so as not to affect the magnetic circuit and motor performance; can also be increased by the rotation of the fan
  • the air convection speed enables external air to enter the inside of the motor from the air inlet and circulate along one or more heat dissipation channels to take the heat generated by the operation of the motor away from the system, with high heat dissipation efficiency and good heat dissipation effect; in addition, the embodiment of the application
  • the provided permanent magnet motor with a heat dissipation structure does not require an external heat dissipation device, which helps to ensure the volume advantage.
  • the quality of the motor is optimized, so that the motor has a lighter weight than a motor with the same performance. Help to ensure the quality advantage.
  • Fig. 1 is a schematic structural diagram of a permanent magnet motor with a heat dissipation structure according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of the stator and rotor structure of a permanent magnet motor with a heat dissipation structure in Embodiment 1 of the present application;
  • Fig. 3 is a right side view of the structure diagram of the stator and rotor of Fig. 2;
  • FIG. 4 is a cross-sectional view of the stator and rotor structure shown in FIG. 2 along line A-A;
  • FIG. 5 is a schematic diagram of the path of magnetic lines of force under a single tooth and under a single permanent magnet of a permanent magnet motor stator tooth with a heat dissipation structure in Embodiment 1 of the present application;
  • FIG. 6 is a schematic diagram of the housing structure of a permanent magnet motor with a heat dissipation structure in Embodiment 1 of the present application;
  • FIG. 7 is a cross-sectional view of the casing of a permanent magnet motor with a heat dissipation structure in Embodiment 1 of the present application;
  • FIG. 8 is a schematic diagram of heat dissipation of a permanent magnet motor with a heat dissipation structure according to Embodiment 1 of the present application;
  • Fig. 9 is a heat dissipation principle diagram of a permanent magnet motor with a heat dissipation structure in Embodiment 2 of the present application.
  • FIG. 1 is a schematic diagram of a permanent magnet motor with a heat dissipation structure according to an embodiment of the present application; as shown in the figure, the present application provides a permanent magnet motor with a heat dissipation structure, which includes a casing 10, a rotor 20, and a stator 30.
  • the casing 10 includes a front end cover 12, a middle casing 14, a rear end cover 16 and an enclosed inner cavity which are connected to each other, wherein the middle casing 14 is cylindrical; the front end cover 12 and the The rear end cover 16 is respectively located at the front and rear of the stator 30, and the front end cover 12 is provided with a bearing 122.
  • the rotor 20 includes a rotating shaft 22, a rotor body 24, and a permanent magnet 26 located on the outer surface of the rotor body 24.
  • the rotor body 24 and the stator 30 are located in the inner cavity, and the rotating shaft 22 extends in the inner cavity. And pierce out the casing 10. In the description of this application, it is defined that the direction where the shaft extends is forward, and the direction without shaft extension is the rear.
  • the stator 30 has a cylindrical shape and includes a stator tooth portion and a stator yoke portion 34.
  • a coil 32 is wound on the stator tooth portion.
  • the rotor body 24 and/or the stator 30 are provided with at least one heat dissipation cavity extending in the axial direction.
  • "and/or” includes the following three solutions: (1) The heat dissipation cavity is opened on the rotor body 24; 2) The heat dissipation cavity is opened on the stator 30; (3) The heat dissipation cavity is opened on both the rotor body 24 and the stator 30.
  • the casing 10 is provided with an opening, and the opening may specifically be a through hole opened in the casing, and the heat dissipation cavity forms a heat dissipation channel with the inner cavity and the through hole.
  • a heat dissipation cavity is provided on the rotor and/or the stator.
  • the heat dissipation cavity can be opened only on the stator or only on the rotor as required, or preferably at the same time.
  • the stator and the rotor are provided with heat dissipation cavities to increase the heat dissipation area from the heat source itself, and an opening is provided on the casing.
  • the heat dissipation cavity and the inner cavity and the opening form a heat dissipation channel, which helps to remove the heat generated during operation. It dissipates heat, has high heat dissipation efficiency and good effect. Not only does it require no additional structure, it has a volume advantage, but also effectively reduces its own weight by opening the cavity and has a quality advantage.
  • Figure 2 is a schematic diagram of the stator and rotor structure of the permanent magnet motor with a heat dissipation structure in this embodiment
  • Figure 3 is a right view of the stator and rotor structure diagram of Figure 2
  • Figure 4 is the stator and rotor of Figure 2 AA cross-sectional view of the structure
  • the heat dissipation cavity includes at least one first heat dissipation cavity 21 extending in the axial direction on the rotor 20 and the stator 30 At least one second heat dissipation cavity 31 extending in the axial direction.
  • the number of the first heat dissipation cavities 21 and the second heat dissipation cavities 31 may be multiple, and they may be arranged at intervals along the circumferential direction. In other embodiments, only the first heat dissipation cavity 21 may be provided, or only the second heat dissipation cavity 31 may be provided. In this embodiment, cavity processing is directly performed on the rotor 20 and the stator 30, and the opened first heat dissipation cavity 21 and the second heat dissipation cavity 31 respectively increase the heat dissipation area of the rotor 20 and the stator 30, so that the heat dissipation effect is better.
  • the first heat dissipating cavity 21 and the second heat dissipating cavity 31 are located on the rotor body 24 and the stator 30 where the magnetic flux is relatively small in the magnetic field distribution.
  • the position of the cavity in the drawing of this embodiment is only It is indicated that the specific location needs to be selected in combination with the size of the motor and its magnetic field distribution.
  • Figure 5 is a schematic diagram of the path of the magnetic field lines under a single tooth and a single permanent magnet of the stator tooth of the motor according to this embodiment. 51 and 52 are the paths of magnetic field lines.
  • the first heat dissipation cavity 21 is a through hole
  • the second heat dissipation cavity 31 is a through slot located in the outer ring of the yoke of the stator 30
  • the third heat dissipation cavity 221 extending in the axial direction is a through hole. In other embodiments, the third heat dissipation cavity 221 may not be provided.
  • FIG. 6 is a schematic diagram of the housing structure of a permanent magnet motor with a heat dissipation structure in Embodiment 1
  • FIG. 7 is a cross-sectional view of the housing of a permanent magnet motor with a heat dissipation structure in Embodiment 1; FIGS. 6 and 7
  • the opening includes at least one first air inlet 142 and at least a first air outlet 144 respectively located before and after the stator on the intermediate housing, and also includes a front cover 12 or a rear cover 16 that penetrates through it. ⁇ At least one second air inlet 124.
  • first air inlets 142 and first air outlets 144 there are multiple first air inlets 142 and first air outlets 144, and they are arranged on the edge of the intermediate casing 14 along the circumferential direction.
  • the first air inlet 142 is located on the front edge of the intermediate housing 14
  • the first air outlet 144 is located on the rear edge of the intermediate housing 14
  • the front and rear positions of the second air inlet 124 are at the same position as the first air inlet 124.
  • An air inlet 142 is the same, that is, it is located on the front end cover 12.
  • the first air inlet and the first air outlet can be reversed, that is, the first air inlet is located on the rear edge of the middle casing, and the first air outlet The air outlet is located on the front edge of the middle casing, and the second air inlet is located on the rear end cover.
  • FIG. 8 is a heat dissipation principle diagram of the permanent magnet motor with a heat dissipation structure in Embodiment 1.
  • the first heat dissipation cavity 21 and the first air inlet 142, the first air outlet 144, and the inner The cavity forms a first heat dissipation channel I;
  • the second heat dissipation cavity 31, the first air inlet 142, the first air outlet 144, and the inner cavity form a second heat dissipation channel II;
  • the second air inlet 124, the first air outlet 144, and the inner cavity form a third heat dissipation channel III;
  • the second heat dissipation cavity 31, the second air inlet 124, the first air outlet 144, and the inner cavity form a fourth heat dissipation channel IV .
  • the permanent magnet motor with a heat dissipation structure in this embodiment further includes a heat dissipation fan 42.
  • the cooling fan 42 is a straight blade fan, which is arranged between the stator 30 and the front end cover 12 or the rear end cover 16, and is opposite to the position of the second air inlet 124, that is, in this embodiment, It is provided between the stator 30 and the rear end cover 16, and in other embodiments, it may also be provided between the stator 30 and the front end cover 12.
  • the arrangement of the straight blade fan further accelerates the air flow rate in the inner cavity inside the permanent magnet motor casing, improves the heat dissipation efficiency of the permanent magnet motor, and enhances the heat dissipation effect of the permanent magnet motor.
  • the air outside the motor can quickly flow through the rotor 20 and the first and second heat dissipation cavities opened in the outer ring of the yoke of the stator 30.
  • the heat generated when the motor is working is quickly taken away, which improves the heat dissipation efficiency of the permanent magnet motor and achieves a better heat dissipation effect.
  • FIG. 9 is a heat dissipation principle diagram of a permanent magnet motor with a heat dissipation structure according to the second embodiment.
  • the motor with heat dissipation structure of this embodiment differs in that the heat dissipation fan is a curved blade fan, and due to the difference in the air flow direction generated by the operation of the curved blade fan, the curved blade The number and position setting of the blade fans, and the position setting of the air inlet and the air outlet are different from those in the first embodiment, which in turn leads to different heat dissipation channels.
  • the heat dissipation cavity includes at least one first heat dissipation cavity 21 extending in the axial direction provided on the rotor 20 and at least one second heat dissipation cavity 31 extending in the axial direction provided by the stator, as
  • the number of the first heat dissipation cavities 21 and the second heat dissipation cavities 31 may be multiple, and they may be arranged at intervals along the circumferential direction. In other embodiments, only the first heat dissipation cavities 21 may be provided.
  • the first heat dissipation cavity 21 and the second heat dissipation cavity 31 are located on the rotor body 24 and the stator 30 at a position where the magnetic flux is relatively small in the magnetic field distribution.
  • the first heat dissipation cavity 21 is a through hole
  • the second heat dissipation cavity 31 is a through slot located on the outer ring of the yoke of the stator 30;
  • the heat dissipating cavity 221 and the third heat dissipating cavity 221 are a through hole, the arrangement of which is helpful to reduce its own weight. In other embodiments, the third heat dissipating cavity 221 may not be provided.
  • the opening includes at least one third air inlet 126 opened at the front end cover and at least one second air outlet 162 opened at the rear end cover; the first The heat dissipation cavity 21, the third air inlet 126, the second air outlet 162, and the inner cavity form a fifth heat dissipation channel V; the third heat dissipation cavity 221, the third air inlet 126, the second air outlet 162, and the inner cavity form a fifth heat dissipation channel V; The cavity forms a sixth heat dissipation channel VI.
  • the cooling fan 44 is one or two curved fan blades, in this embodiment there are two, which are respectively arranged between the stator 30 and the front cover 12 and between the stator 30 and the rear cover 16, in other implementations There may also be one method, which is arranged in the inner cavity and located in front and rear of the stator 30 respectively, specifically between the stator 30 and the front end cover 12 or between the stator 30 and the rear end cover 16.
  • the cooling fan 44 is used to form air convection extending in the axial direction, driving the air from the third air inlet 126 into the inside of the motor structure, and flowing through the fifth heat dissipation channel V and the sixth heat dissipation channel VI.
  • the heat from the second air outlet 162 is taken away from the motor, as shown by the arrow in the figure as the air flow direction, in order to achieve the purpose of heat dissipation.
  • heat dissipation cavities are opened at the stator and rotor to increase the heat dissipation area from the heat source, and combined with the openings opened on the casing as the air inlet and outlet, one or more A heat dissipation channel;
  • the heat dissipation cavity can be arranged on the rotor body and/or the stator at a position where the magnetic flux is small in the magnetic field distribution, so as not to affect the magnetic circuit and the performance of the motor;
  • the air convection can also be increased by the rotation of the fan Speed, so that external air can enter the inside of the motor from the air inlet, and circulate along one or more heat dissipation channels, and take the heat generated by the operation of the motor away from the system, with high heat dissipation efficiency and good heat dissipation effect;
  • the embodiment of the application provides A permanent magnet motor with a heat dissipation structure does not need to be

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

L'invention concerne un moteur à aimant permanent doté d'une structure de dissipation de chaleur, comprenant une cavité de dissipation de chaleur (21, 31, 221) formée dans un stator (30) et/ou un rotor (20). La zone de dissipation de chaleur est augmentée à partir d'une source de chauffage, et un ou plusieurs canaux de dissipation de chaleur sont formés par combinaison d'une ouverture (142, 144, 124) formée sur un boîtier (10) en tant qu'entrée d'air et sortie d'air. La cavité de dissipation de chaleur (21, 31, 221) peut être formée dans une position caractérisée par la présence d'un flux magnétique relativement petit dans une distribution de champ magnétique sur le corps de rotor (24) et/ou le stator (30), de telle sorte que le circuit magnétique et la performance de moteur ne sont pas influencés. La vitesse de convection d'air peut être augmentée au moyen de la rotation d'un ventilateur (42, 44), de sorte que l'air extérieur puisse entrer dans le moteur à partir de l'entrée d'air (142, 124), que la chaleur soit mise en circulation le long d'un ou de plusieurs canaux de dissipation de chaleur, et que la chaleur générée par le moteur en fonctionnement soit évacuée du système. L'efficacité de dissipation de chaleur est élevée, l'effet de dissipation de chaleur est bon, un dispositif de dissipation de chaleur additionnel n'a pas besoin d'être fourni, l'avantage en volume peut être garanti, la qualité du moteur est optimisée en formant la cavité et le trou traversant, le moteur est plus léger qu'un moteur ayant les mêmes performances en poids, et l'avantage que représente un niveau de qualité plus élevé peut être garanti.
PCT/CN2019/123373 2019-08-29 2019-12-05 Moteur à aimant permanent à structure de dissipation de chaleur Ceased WO2021036082A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201921438537.0 2019-08-29
CN201921438537.0U CN210273630U (zh) 2019-08-29 2019-08-29 一种具有散热结构的永磁电机

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WO2021036082A1 true WO2021036082A1 (fr) 2021-03-04

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Cited By (1)

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CN121036409A (zh) * 2025-10-30 2025-11-28 南京水泽万物环保科技有限公司 一种小口径高扬程的潜水泵电机

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CN114142678A (zh) * 2020-09-04 2022-03-04 苏州宝时得电动工具有限公司 手持式电动工具
CN112152361A (zh) * 2020-10-19 2020-12-29 珠海格力电器股份有限公司 一种转子结构、永磁电机以及冷却方法
CN112751461B (zh) * 2020-12-29 2022-04-26 徐州鸿润达电动车有限公司 一种散热效率高的电机
CN117856514A (zh) * 2021-02-06 2024-04-09 九阳股份有限公司 一种扁平化电机
CN114884261B (zh) * 2022-05-09 2023-09-12 南京玛格耐特智能科技有限公司 一种具有散热和降噪功能的永磁直驱电机
CN115001196B (zh) * 2022-05-13 2025-09-02 中山市天虹电机制造有限公司 一种工业缝纫机的电机
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US20110037330A1 (en) * 2008-04-08 2011-02-17 Moteurs Leroy-Somer electric machine including a multi-channel fan
CN102106060A (zh) * 2008-08-01 2011-06-22 西门子公司 转子冷却经改进的高防护等级电机
CN102570719A (zh) * 2011-12-31 2012-07-11 东元总合科技（杭州）有限公司 大功率电机

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Publication number Priority date Publication date Assignee Title
CN101263642A (zh) * 2005-09-16 2008-09-10 西门子公司 带有永磁体的电机
US20110037330A1 (en) * 2008-04-08 2011-02-17 Moteurs Leroy-Somer electric machine including a multi-channel fan
CN102106060A (zh) * 2008-08-01 2011-06-22 西门子公司 转子冷却经改进的高防护等级电机
CN102570719A (zh) * 2011-12-31 2012-07-11 东元总合科技（杭州）有限公司 大功率电机

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Publication number Priority date Publication date Assignee Title
CN121036409A (zh) * 2025-10-30 2025-11-28 南京水泽万物环保科技有限公司 一种小口径高扬程的潜水泵电机

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