CN108599513A - A kind of permanent magnetic brushless with long service life - Google Patents
A kind of permanent magnetic brushless with long service life Download PDFInfo
- Publication number
- CN108599513A CN108599513A CN201810645878.9A CN201810645878A CN108599513A CN 108599513 A CN108599513 A CN 108599513A CN 201810645878 A CN201810645878 A CN 201810645878A CN 108599513 A CN108599513 A CN 108599513A
- Authority
- CN
- China
- Prior art keywords
- shell
- shaft
- service life
- rotor
- long service
- 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.)
- Pending
Links
- 238000003825 pressing Methods 0.000 claims abstract description 11
- 239000011148 porous material Substances 0.000 claims abstract description 9
- 238000009423 ventilation Methods 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims abstract description 7
- 239000000428 dust Substances 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000009975 flexible effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
- H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
-
- 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
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- 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
- H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Brushless Motors (AREA)
Abstract
The invention discloses a kind of permanent magnetic brushless with long service life, including shell, the shell is internally provided with shaft, the left end of the shaft runs through shell and extends to the outside of shell, the surface of the shaft and it is internally provided with rotor core positioned at shell, the outside of the rotor core is provided with rotor permanent magnet, and the outside of the rotor permanent magnet is provided with stator winding, the surface of the shaft and is both provided with rotor pressing ring positioned at the both sides of rotor core.The present invention passes through shell, shaft, rotor core, rotor permanent magnet, stator winding, rotor pressing ring, Hall sensor permanent magnet, Hall sensor, intercommunicating pore, the setting for installing cover, fan and ventilation hole additional, the heat of enclosure interior can be dispersed, also solve the problem of conventional permanent magnet brushless motor service life falls short of simultaneously, the permanent magnetic brushless with long service life, have advantage with long service life, is worthy to be popularized.
Description
Technical field
The present invention relates to technical field of motors, specially a kind of permanent magnetic brushless with long service life.
Background technology
Permanent magnet brushless electromotor system is that object is become using controller as core with electric and electronic power in order to control with motor
It changes the outfit and is set to the electric drive control system of executing agency, with motor technology, control theory, digital PWM technique, new
The progress of material technology, microelectric technique and modern control technology, servo-drive system experienced from stepping servo to DC servo, into
And to the development course of permanent magnetic brushless servo-drive system, the main flow direction of electric machines control technology is had become at present, with demand
The increase of amount, it is also higher and higher for the performance and used life requirement of permanent magnetic brushless, in traditional permanent magnetic brushless
Portion does not have heat sinking function, and when its ontology is worked, the high heat of generation can adversely affect it, so as to shorten
Its service life.
Invention content
The purpose of the present invention is to provide a kind of permanent magnetic brushless with long service life, have with long service life excellent
Point solves the problems, such as that conventional permanent magnet brushless motor service life falls short of.
To achieve the above object, the present invention provides the following technical solutions：A kind of permanent magnetic brushless with long service life, packet
Shell is included, the shell is internally provided with shaft, and the left end of the shaft runs through shell and extends to the outside of shell, described
The surface of shaft and it being internally provided with rotor core positioned at shell, the outside of the rotor core is provided with rotor permanent magnet,
The outside of the rotor permanent magnet is provided with stator winding, the surface of the shaft and is both provided with positioned at the both sides of rotor core
Rotor pressing ring, the surface of the shaft and is provided with Hall sensor permanent magnet on the left of the rotor pressing ring, and the Hall passes
Surface on the left of sensor permanent magnet is provided with Hall sensor, and the top and bottom of the housing cavity has been fixedly connected with heat conduction
The right side opening of liner, the shell is equipped with intercommunicating pore, and installation cover is provided on the right side of the shell, and the right end of the shaft runs through
Shell and the inside for extending to installation cover are fixedly connected with fan, and the right side opening for installing cover additional is equipped with ventilation hole.
Preferably, the bottom of the shell is fixedly connected with mounting plate, and end cap, institute are fixedly connected on the left of the shell
The surface for stating mounting plate and end cap offers mounting hole, and the shaft runs through end cap.
Preferably, the both sides of the housing cavity have been fixedly connected with bearing, and the bearing is through shell and is located at shaft
Outer surface.
Preferably, the surface of the end cap offers preformed hole, and the inside of preformed hole is fixedly connected with dust retaining ring, described
Dust retaining ring and the surface activity of shaft connect.
Preferably, the inside for installing cover additional is fixedly connected with Air Filter, and the Air Filter is located at the right side of fan.
Preferably, it is fixedly connected with reinforcing rib on the outside of the shell and installation cover junction.
Compared with prior art, beneficial effects of the present invention are as follows：
1, the present invention by shell, shaft, rotor core, rotor permanent magnet, stator winding, rotor pressing ring, Hall sensor forever
Magnet, Hall sensor, intercommunicating pore, the setting for installing cover, fan and ventilation hole additional, can drive the heat of enclosure interior
It dissipates, while also solving the problem of conventional permanent magnet brushless motor service life falls short of, the brushless, permanently electricity with long service life
Machine has advantage with long service life, is worthy to be popularized.
2, the present invention is by the setting of chill bar, it is the crystallization of special process and advanced technology, and unusual leads
Thermal energy power and low resistance are the materials used in special occasions, the flexibility that capacity of heat transmission and material itself have, very well
The heat dissipation for being bonded power device and installation requirement, it is convenient that shell is carried out by the setting of mounting plate, end cap and mounting hole
Fixed and installation can reduce frictional force when shaft rotation by the setting of bearing so that and shaft rotates more smooth,
By the setting of dust retaining ring, the inside of shell can be entered from the junction of shaft and end cap with blocks dust, and then reached pair
The purpose of housing interior structure protection can completely cut off dust from right side by the setting of Air Filter, pass through reinforcing rib
Setting can reinforce the connection of shell and installation cover so that shell and the connection installed additional between cover are even closer.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the structure left view of end cap of the present invention.
In figure：1 shell, 2 shafts, 3 rotor cores, 4 rotor permanent magnets, 5 stator winding, 6 rotor pressing rings, 7 hall sensings
Device permanent magnet, 8 Hall sensors, 9 chill bars, 10 intercommunicating pores, 11 install cover, 12 fans, 13 ventilation holes, 14 mounting plates, 15 additional
End cap, 16 mounting holes, 17 bearings, 18 dust retaining rings, 19 Air Filters, 20 reinforcing ribs.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
- 2 are please referred to Fig.1, a kind of permanent magnetic brushless with long service life, including shell 1, shell 1 are internally provided with
Shaft 2, the left end of shaft 2 is through shell 1 and extends to the outside of shell 1, the surface of shaft 2 and is set positioned at the inside of shell 1
Be equipped with rotor core 3, the outside of rotor core 3 is provided with rotor permanent magnet 4, the outside of rotor permanent magnet 4 be provided with stator around
Group 5, the surface of shaft 2 and is both provided with rotor pressing ring 6 positioned at the both sides of rotor core 3, the surface of shaft 2 and is located at rotor pressure
The left side of circle 6 is provided with Hall sensor permanent magnet 7, and the surface in 7 left side of Hall sensor permanent magnet is provided with Hall sensor
8, the top and bottom of 1 inner cavity of shell has been fixedly connected with chill bar 9, and the right side opening of shell 1 is equipped with intercommunicating pore 10, shell 1
Right side be provided with installation cover 11, the inside that the right end of shaft 2 installs cover 11 additional through shell 1 and extending to is fixedly connected with fan
12, the right side opening for installing cover 11 additional is equipped with ventilation hole 13, and the bottom of shell 1 is fixedly connected with mounting plate 14, and the left side of shell 1 is fixed
It is connected with end cap 15, the surface of mounting plate 14 and end cap 15 offers mounting hole 16, and shaft 2 runs through end cap 15,1 inner cavity of shell
Both sides be fixedly connected with bearing 17, outer surface of the bearing 17 through shell 1 and positioned at shaft 2, the surface of end cap 15 opens up
There is preformed hole, and the inside of preformed hole is fixedly connected with dust retaining ring 18, dust retaining ring 18 is connect with the surface activity of shaft 2, is installed additional
The inside of cover 11 is fixedly connected with Air Filter 19, and Air Filter 19 is located at the right side of fan 12,11 junctions of shell 1 and installation cover
Outside is fixedly connected with reinforcing rib 20, and by the setting of chill bar 9, it is the crystallization of special process and advanced technology, out of
The ordinary capacity of heat transmission and low resistance is the material used in special occasions, and capacity of heat transmission and material itself have flexible
Property, has been bonded heat dissipation and the installation requirement of power device well, by the setting of mounting plate 14, end cap 15 and mounting hole 16,
It is convenient that shell 1 is fixed and is installed, by the setting of bearing 17, frictional force when shaft 2 rotates can be reduced so that turn
Axis 2 rotates more smooth, by the setting of dust retaining ring 18, can be entered from the junction of shaft 2 and end cap 15 with blocks dust
To the inside of shell 1, and then achieve the purpose that 1 internal structure protection of shell, it, can be from right side by the setting of Air Filter 19
Dust is completely cut off, by the setting of reinforcing rib 20, the connection of shell 1 and installation cover 11 can be reinforced so that shell
Body 1 and install additional cover 11 between connection it is even closer, by shell 1, shaft 2, rotor core 3, rotor permanent magnet 4, stator around
Group 5, Hall sensor permanent magnet 7, Hall sensor 8, intercommunicating pore 10, installs cover 11, fan 12 and ventilation hole additional at rotor pressing ring 6
13 setting can disperse the heat inside shell 1, while also solve conventional permanent magnet brushless motor service life not
Enough long problem, the permanent magnetic brushless with long service life have advantage with long service life, are worthy to be popularized.
In use, when permanent magnetic brushless works, shaft 2 can drive fan 12 to rotate simultaneously, and fan 12 is rotated shell
Heat inside body 1 is dispersed by intercommunicating pore 10, and Air Filter 19 can stop the dust generated because of air circulation, gear
Dirt ring 18 completely cuts off dust from left side, while the heat generated is transmitted by chill bar 9, and chill bar 9 passes heat
Shell 1 is passed, then by heat derives to the external world, chill bar 9 can be scattered with moving back for accelerated heat, since permanent magnetic brushless is existing
There are instrument, the technical program to be intended to do further distillation to service life length, the operation principle of permanent magnetic brushless is not made herein
Narration in detail.
In summary：The permanent magnetic brushless with long service life, forever by shell 1, shaft 2, rotor core 3, rotor
Magnet 4, rotor pressing ring 6, Hall sensor permanent magnet 7, Hall sensor 8, intercommunicating pore 10, installs cover 11, wind additional at stator winding 5
Fan 12 and ventilation hole 13 are used cooperatively, and solve the problems, such as that conventional permanent magnet brushless motor service life falls short of.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of permanent magnetic brushless with long service life, including shell（1）, it is characterised in that：The shell（1）Inside set
It is equipped with shaft（2）, the shaft（2）Left end run through shell（1）And extend to shell（1）Outside, the shaft（2）Table
Face and be located at shell（1）Be internally provided with rotor core（3）, the rotor core（3）Outside be provided with rotor permanent magnet
（4）, the rotor permanent magnet（4）Outside be provided with stator winding（5）, the shaft（2）Surface and be located at rotor core
（3）Both sides be both provided with rotor pressing ring（6）, the shaft（2）Surface and be located at rotor pressing ring（6）Left side be provided with suddenly
That sensor permanent magnet（7）, the Hall sensor permanent magnet（7）The surface in left side is provided with Hall sensor（8）, the shell
Body（1）The top and bottom of inner cavity has been fixedly connected with chill bar（9）, the shell（1）Right side opening be equipped with intercommunicating pore
（10）, the shell（1）Right side be provided with installation cover（11）, the shaft（2）Right end run through shell（1）And it extends to and adds
Dress cover（11）Inside be fixedly connected with fan（12）, the installation cover（11）Right side opening be equipped with ventilation hole（13）.
2. a kind of permanent magnetic brushless with long service life according to claim 1, it is characterised in that：The shell（1）
Bottom be fixedly connected with mounting plate（14）, the shell（1）Left side be fixedly connected with end cap（15）, the mounting plate（14）
With end cap（15）Surface offer mounting hole（16）, the shaft（2）Through end cap（15）.
3. a kind of permanent magnetic brushless with long service life according to claim 1, it is characterised in that：The shell（1）
The both sides of inner cavity have been fixedly connected with bearing（17）, the bearing（17）Through shell（1）And it is located at shaft（2）Outer surface.
4. a kind of permanent magnetic brushless with long service life according to claim 1, it is characterised in that：The end cap（15）
Surface offer preformed hole, and the inside of preformed hole is fixedly connected with dust retaining ring（18）, the dust retaining ring（18）With shaft（2）
Surface activity connection.
5. a kind of permanent magnetic brushless with long service life according to claim 1, it is characterised in that：The installation cover
（11）Inside be fixedly connected with Air Filter（19）, the Air Filter（19）Positioned at fan（12）Right side.
6. a kind of permanent magnetic brushless with long service life according to claim 1, it is characterised in that：The shell（1）
It is covered with installing additional（11）Reinforcing rib is fixedly connected on the outside of junction（20）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810645878.9A CN108599513A (en) | 2018-06-21 | 2018-06-21 | A kind of permanent magnetic brushless with long service life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810645878.9A CN108599513A (en) | 2018-06-21 | 2018-06-21 | A kind of permanent magnetic brushless with long service life |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108599513A true CN108599513A (en) | 2018-09-28 |
Family
ID=63628637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810645878.9A Pending CN108599513A (en) | 2018-06-21 | 2018-06-21 | A kind of permanent magnetic brushless with long service life |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108599513A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111835146A (en) * | 2020-08-17 | 2020-10-27 | 江苏恒康机电有限公司 | Energy-saving asynchronous motor with dustproof and heat dissipation function |
| CN112087094A (en) * | 2020-09-10 | 2020-12-15 | 淮阴工学院 | Polarization heat dissipation type unit permanent magnet motor and working method thereof |
| CN113178978A (en) * | 2021-05-12 | 2021-07-27 | 上海海事大学 | Protection device for be used for biconvex utmost point PMSM |
| EP3859949A1 (en) * | 2020-01-31 | 2021-08-04 | System Cleaners A/S | System for cooling a low pressure cleaner |
| CN113783346A (en) * | 2021-08-24 | 2021-12-10 | 芜湖德力电机有限公司 | Brushless DC motor heat radiation structure |
| CN113937938A (en) * | 2021-12-16 | 2022-01-14 | 广东常明机电有限公司 | Motor convenient to clearance |
| CN116961285A (en) * | 2023-07-25 | 2023-10-27 | 金华江科动力有限公司 | Permanent magnet motor |
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| CN204681195U (en) * | 2015-04-23 | 2015-09-30 | 通能同力能源科技（天津）有限公司 | A kind of energy-saving permanent-magnet motor of easy heat radiation |
| CN205670739U (en) * | 2016-06-17 | 2016-11-02 | 重庆凯邦电机有限公司 | A kind of brushless electric machine |
| CN206422675U (en) * | 2017-02-13 | 2017-08-18 | 东莞市恒迅微型电机有限公司 | A kind of brushless, permanently excited direct current motor |
| CN206472000U (en) * | 2017-02-28 | 2017-09-05 | 长城汽车股份有限公司 | Motor and vehicle |
| CN206759218U (en) * | 2017-05-25 | 2017-12-15 | 覃世英 | High rotating speed six phase permanent-magnet synchronous motor |
| CN107528421A (en) * | 2017-09-02 | 2017-12-29 | *** | Efficient, energy-saving three-phase asynchronous motor |
| CN206834897U (en) * | 2017-06-26 | 2018-01-02 | 江苏欧邦电机制造有限公司 | A kind of heat radiating type dc motor |
| CN107612165A (en) * | 2017-09-30 | 2018-01-19 | 江苏中杰澳新材料有限公司 | Tapered air gap axial direction double loop magnetic field permanent magnet synchronous motor |
| CN207166305U (en) * | 2017-08-15 | 2018-03-30 | 天津创远亿德科技发展有限公司 | A kind of rare earth permanent-magnet synchronization motor |
| CN208767952U (en) * | 2018-06-21 | 2019-04-19 | 许昌市大力电机制造有限公司 | A kind of permanent magnetic brushless with long service life |
-
2018
- 2018-06-21 CN CN201810645878.9A patent/CN108599513A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100231066A1 (en) * | 2005-09-16 | 2010-09-16 | Siemens Aktiengesellschaft | Electrical machine with permanent magnets |
| CN203406763U (en) * | 2013-08-30 | 2014-01-22 | 台州指鼎电器有限公司 | Permanent magnet brushless DC motor |
| CN204681195U (en) * | 2015-04-23 | 2015-09-30 | 通能同力能源科技（天津）有限公司 | A kind of energy-saving permanent-magnet motor of easy heat radiation |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3859949A1 (en) * | 2020-01-31 | 2021-08-04 | System Cleaners A/S | System for cooling a low pressure cleaner |
| CN111835146A (en) * | 2020-08-17 | 2020-10-27 | 江苏恒康机电有限公司 | Energy-saving asynchronous motor with dustproof and heat dissipation function |
| CN111835146B (en) * | 2020-08-17 | 2021-08-24 | 江苏恒康机电有限公司 | Energy-saving asynchronous motor with dustproof and heat dissipation function |
| CN112087094A (en) * | 2020-09-10 | 2020-12-15 | 淮阴工学院 | Polarization heat dissipation type unit permanent magnet motor and working method thereof |
| CN112087094B (en) * | 2020-09-10 | 2021-08-17 | 淮阴工学院 | Polarization heat dissipation type unit permanent magnet motor and working method thereof |
| CN113178978A (en) * | 2021-05-12 | 2021-07-27 | 上海海事大学 | Protection device for be used for biconvex utmost point PMSM |
| CN113783346A (en) * | 2021-08-24 | 2021-12-10 | 芜湖德力电机有限公司 | Brushless DC motor heat radiation structure |
| CN113783346B (en) * | 2021-08-24 | 2024-02-02 | 芜湖德力电机有限公司 | Brushless direct current motor heat radiation structure |
| CN113937938A (en) * | 2021-12-16 | 2022-01-14 | 广东常明机电有限公司 | Motor convenient to clearance |
| CN116961285A (en) * | 2023-07-25 | 2023-10-27 | 金华江科动力有限公司 | Permanent magnet motor |
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Application publication date: 20180928 |