CN113644765A - Air-cooled permanent magnet synchronous motor - Google Patents
Air-cooled permanent magnet synchronous motor Download PDFInfo
- Publication number
- CN113644765A CN113644765A CN202110816501.7A CN202110816501A CN113644765A CN 113644765 A CN113644765 A CN 113644765A CN 202110816501 A CN202110816501 A CN 202110816501A CN 113644765 A CN113644765 A CN 113644765A
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- China
- Prior art keywords
- motor
- cooling air
- permanent magnet
- cylinder
- magnet synchronous
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- 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
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
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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
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
本发明公开了一种风冷式永磁同步电机，包括电机壳体、电机定子以及与电机轴安装为一体的电机永磁转子，电机壳体包括安装为一体的电机前盖、电机筒体和电机后盖，电机定子位于电机永磁转子外周且压装在电机筒体内；其中，电机筒体采用板材焊接成型，且电机后盖设有冷却风入口，靠近电机前盖一侧的电机筒体在其圆周方向上设有筒体冷却风出口，筒体冷却风出口位于冷却风入口的外周；同时电机定子设有分别与冷却风入口和筒体冷却风出口连通的内部冷却风道;本发明结构紧凑，电机冷却效果好，且制作成本低。
The invention discloses an air-cooled permanent magnet synchronous motor, comprising a motor housing, a motor stator and a motor permanent magnet rotor integrally mounted with a motor shaft. The motor housing comprises a motor front cover and a motor barrel which are integrally mounted. The motor body and the motor back cover, the motor stator is located on the outer periphery of the motor permanent magnet rotor and press-fitted in the motor cylinder; the motor cylinder is formed by welding plate, and the motor back cover is provided with a cooling air inlet, which is close to the motor on the side of the motor front cover. The cylindrical body is provided with a cylindrical cooling air outlet in its circumferential direction, and the cylindrical cooling air outlet is located on the outer circumference of the cooling air inlet; meanwhile, the motor stator is provided with an internal cooling air duct which is respectively communicated with the cooling air inlet and the cylindrical cooling air outlet; The invention has compact structure, good motor cooling effect and low manufacturing cost.
Description
Technical Field
The invention belongs to the technical field of permanent magnet synchronization, and particularly relates to an air-cooled permanent magnet synchronous motor.
Background
The permanent magnet synchronous motor has the characteristics of small volume, high overall operation efficiency, high power factor, large starting torque, good force performance index, low temperature rise and the like. Compared with the traditional motor, the permanent magnet synchronous motor adopts the permanent magnet excitation in the rotor, can avoid exciting current to produce the magnetic field and simultaneously cause the excitation loss, but the permanent magnet synchronous motor has the following defects: forced heat dissipation measures need to be taken to take away heat inside the permanent magnet synchronous motor so as to avoid demagnetization caused by the rotor permanent magnet in a long-term high-temperature working environment.
The existing air-cooled permanent magnet synchronous motor generally adopts a casting shell, a cooling air channel is cast on the shell, and then air is sent into the air channel for cooling through a fan positioned at the end part of a rotating shaft. This cooling air duct structure only can realize cooling off motor stator surface, can't realize effectual wind channel cooling effect to rotor and stator inside, and not only the radiating effect is poor, and is with high costs moreover, consequently is necessary to improve current air-cooled PMSM structure.
Disclosure of Invention
In view of this, the present invention provides an air-cooled permanent magnet synchronous motor, which has a compact structure, a good cooling effect, and a low manufacturing cost.
The technical scheme adopted by the invention is as follows:
an air-cooled permanent magnet synchronous motor comprises a motor shell, a motor stator and a motor permanent magnet rotor which is integrally installed with a motor shaft, wherein the motor shell comprises a motor front cover, a motor barrel and a motor rear cover which are integrally installed; the motor cylinder is formed by welding plates, the motor rear cover is provided with a cooling air inlet, a cylinder cooling air outlet is formed in the circumferential direction of the motor cylinder close to one side of the motor front cover, and the cylinder cooling air outlet is positioned on the periphery of the cooling air inlet; and meanwhile, the motor stator is provided with an internal cooling air channel which is respectively communicated with the cooling air inlet and the barrel cooling air outlet.
Preferably, the motor stator comprises a plurality of stator segment units which are spliced into a whole, and the internal cooling air duct is formed between adjacent stator segment units.
Preferably, the cooling air inlet comprises a plurality of cooling air through holes in the central area of the rear cover of the motor.
Preferably, a plurality of front cover cooling air outlets distributed at intervals are arranged on the circumferential direction of the front cover of the motor, and each front cover cooling air outlet is communicated with the cooling air inlet through the internal cooling air duct.
Preferably, a plurality of barrel cooling air outlet sections distributed at intervals are arranged in the circumferential direction of the motor barrel, and each barrel cooling air outlet section comprises a plurality of cooling air through holes.
Preferably, a cooling fan is arranged at the end part of the motor permanent magnet rotor close to one side of the motor rear cover.
Preferably, the cooling fan comprises straight-bladed centrifugal fans, each of which is circumferentially locked in position by locking tabs.
Preferably, a connecting flange used for being fixedly installed and connected with the motor front cover is welded on the periphery of the motor barrel body close to one side of the motor front cover, a hoisting column is welded on the top of the motor barrel body, and meanwhile, a wire outlet hole used for leading out a wire harness is formed in the wire outlet hole.
Preferably, the motor rear cover is sleeved on the periphery of the motor barrel and locked by a fastener.
Preferably, the motor shaft adopts a motor permanent magnet rotor extension shaft close to one side of the motor front cover, and the motor permanent magnet rotor extension shaft can be relatively rotatably installed on the motor front cover.
According to the invention, the motor cylinder formed by welding plates is arranged, the cooling air inlet is arranged on the rear cover of the motor, the cylinder cooling air outlet is arranged on the motor cylinder close to one side of the front cover of the motor in the circumferential direction, the motor stator is provided with the internal cooling air channel respectively communicated with the cooling air inlet and the cylinder cooling air outlet, and thus a cooling channel structure with a high-efficiency heat dissipation effect is formed.
Drawings
FIG. 1 is a schematic view of an air-cooled PMSM according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 after being rotated by a certain angle;
FIG. 3 is a schematic view of the front end cap of FIG. 1 after being hidden;
FIG. 4 is a cross-sectional view of an air-cooled PMSM according to an embodiment of the present invention;
FIG. 5 is an exploded view of an air-cooled PMSM according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a stator of an electric motor according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention discloses an air-cooled permanent magnet synchronous motor, which comprises a motor shell, a motor stator and a motor permanent magnet rotor, wherein the motor permanent magnet rotor is integrally installed with a motor shaft; the motor cylinder is formed by welding plates, the rear cover of the motor is provided with a cooling air inlet, the motor cylinder close to one side of the front cover of the motor is provided with a cylinder cooling air outlet in the circumferential direction, and the cylinder cooling air outlet is positioned at the periphery of the cooling air inlet; and the motor stator is provided with an internal cooling air channel which is respectively communicated with the cooling air inlet and the cooling air outlet of the cylinder body.
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 6, an air-cooled permanent magnet synchronous motor includes a motor housing, a motor stator 10, and a motor permanent magnet rotor 20 integrally mounted with a motor shaft 21, the motor housing includes a motor front cover 31, a motor cylinder 32, and a motor rear cover 33 integrally mounted, the motor stator 10 is located at the periphery of the motor permanent magnet rotor 20 and is press-fitted in the motor cylinder 32; preferably, in order to facilitate convenience and compact installation effect, in the present embodiment, a connection flange 34 for fixedly installing and connecting with the motor front cover 31 is welded around the motor cylinder 32 near one side of the motor front cover 31, and a hoisting column 41 is welded on the top of the motor cylinder 32, and is provided with an outlet hole 42 for leading out a wiring harness (not shown); the motor rear cover 33 is sleeved on the periphery of the motor cylinder 32 and is locked by a fastener; the motor shaft 21 adopts a motor permanent magnet rotor extension shaft close to one side of the motor front cover 31, and the motor permanent magnet rotor extension shaft can be relatively rotatably arranged on the motor front cover 31, so that the compact structure and the heat dissipation effect of the motor are more facilitated; of course, in other embodiments, the motor shaft may be relatively rotatably mounted on the motor front cover 31 and the motor rear cover 33 through bearings, which is not particularly limited in this embodiment;
in the present embodiment, the motor cylinder 32 is formed by welding plates, the motor rear cover 33 is provided with a cooling air inlet 51, the motor cylinder 32 near the motor front cover 31 is provided with a cylinder cooling air outlet 52 in the circumferential direction, and the cylinder cooling air outlet 52 is located at the periphery of the cooling air inlet 51; meanwhile, the motor stator 10 is provided with an internal cooling air channel 53 which is respectively communicated with the cooling air inlet 51 and the cylinder cooling air outlet 52;
preferably, in the present embodiment, the motor stator 10 includes a plurality of stator segment units 10a that are spliced into a whole, and an internal cooling air duct 53 is formed between adjacent stator segment units 10a, which is beneficial to the efficient heat dissipation effect on the inside of the stator 10; the cooling air inlet 51 comprises a plurality of cooling air through holes 51a positioned in the central area of the rear cover of the motor, so that cooling air can be directly sucked from the central area of the rear cover of the motor quickly; preferably, in the present embodiment, the plurality of permanent magnet steels 20a of the motor permanent magnet rotor 20 are uniformly attached to the periphery of the rotor core 20b at intervals, and a gap 20c is formed between adjacent permanent magnet steels 20a, which is further beneficial to the heat dissipation effect;
preferably, in the present embodiment, the motor front cover 31 is provided with a plurality of front cover cooling air outlets 54 distributed at intervals in the circumferential direction, the front cover cooling air outlets 54 are located at the periphery of the cooling air inlet 51, and each front cover cooling air outlet 54 is communicated with the cooling air inlet 51 through the internal cooling air duct 53, so that the cooling path of the present embodiment can be further expanded;
preferably, in order to facilitate the heat dissipation uniformity of the present embodiment and ensure the sealing installation effect of the motor cylinder 32, in the present embodiment, a plurality of cylinder cooling air outlet sections 52a are arranged in the circumferential direction of the motor cylinder 32, and particularly, in the present embodiment, 4 cylinder cooling air outlet sections 52a (which are staggered from the connecting flange 34 and further facilitate the heat dissipation effect) are adopted, and each cylinder cooling air outlet section 52a includes a plurality of cooling air through holes 52 b;
preferably, in order to improve the heat dissipation effect on the motor permanent magnet rotor 20, in the present embodiment, a cooling fan 22 is disposed at the end of the motor permanent magnet rotor 20 close to the motor rear cover 33; particularly preferably, in order to facilitate a stable mounting effect, in the present embodiment, the cooling fan 22 includes straight-blade centrifugal fans 22a, and each straight-blade centrifugal fan 22a is circumferentially locked and positioned by locking pieces;
this embodiment is through setting up motor barrel 32 that adopts panel weld forming, then lid 33 sets up cooling air inlet 51 behind the motor, motor barrel 32 that is close to motor protecgulum 31 one side sets up barrel cooling air outlet 52 on its circumferencial direction simultaneously, motor stator 10 is equipped with the inside cooling wind channel that communicates with cooling air inlet 51 and barrel cooling air outlet 52 respectively simultaneously, and then form the cooling channel structure who has high-efficient radiating effect, in the time of actual work, it is inside that the inside cooling air current of motor directly passes through stator winding to get into from cooling air inlet 51, and the motor heat is taken away in the clearance between motor stator 10 and the motor permanent magnet rotor 20, compact structure and cooling effect are excellent, and motor barrel 32 in this application adopts panel weld forming, the cost of manufacture of the motor that can obviously reduce.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110816501.7A CN113644765A (en) | 2021-07-20 | 2021-07-20 | Air-cooled permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110816501.7A CN113644765A (en) | 2021-07-20 | 2021-07-20 | Air-cooled permanent magnet synchronous motor |
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| Publication Number | Publication Date |
|---|---|
| CN113644765A true CN113644765A (en) | 2021-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110816501.7A Pending CN113644765A (en) | 2021-07-20 | 2021-07-20 | Air-cooled permanent magnet synchronous motor |
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| CN (1) | CN113644765A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120638733A (en) * | 2025-08-13 | 2025-09-12 | 贵州中航华强科技有限公司 | A high-efficiency cooling high-speed permanent magnet synchronous motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414279A (en) * | 2013-08-30 | 2013-11-27 | 维尔纳（福建）电机有限公司 | Compact power generator |
| CN203850973U (en) * | 2014-05-26 | 2014-09-24 | 广东省东莞电机有限公司 | Motor with built-in ventilation structure |
| CN112583149A (en) * | 2020-12-02 | 2021-03-30 | 卧龙电气驱动集团股份有限公司 | High-power-density permanent magnet motor stator and coil inserting method thereof |
| CN215498461U (en) * | 2021-07-20 | 2022-01-11 | 苏州恒科机电科技有限公司 | Air-cooled permanent magnet synchronous motor |
-
2021
- 2021-07-20 CN CN202110816501.7A patent/CN113644765A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414279A (en) * | 2013-08-30 | 2013-11-27 | 维尔纳（福建）电机有限公司 | Compact power generator |
| CN203850973U (en) * | 2014-05-26 | 2014-09-24 | 广东省东莞电机有限公司 | Motor with built-in ventilation structure |
| CN112583149A (en) * | 2020-12-02 | 2021-03-30 | 卧龙电气驱动集团股份有限公司 | High-power-density permanent magnet motor stator and coil inserting method thereof |
| CN215498461U (en) * | 2021-07-20 | 2022-01-11 | 苏州恒科机电科技有限公司 | Air-cooled permanent magnet synchronous motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120638733A (en) * | 2025-08-13 | 2025-09-12 | 贵州中航华强科技有限公司 | A high-efficiency cooling high-speed permanent magnet synchronous motor |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20220307 Address after: Building 1, No.55, Shenzhen road, high tech Industrial Park, Changshu Economic and Technological Development Zone, Suzhou City, Jiangsu Province Applicant after: Suzhou Chiyou Equipment Technology Co.,Ltd. Address before: 215500 No.11, Nanxin Road, Changkun Industrial Park, Shajiabang Town, Changshu City, Suzhou City, Jiangsu Province Applicant before: Suzhou Hengke Electromechanical Technology Co.,Ltd. |
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| TA01 | Transfer of patent application right |