CN108365724A - Refrigerator permanent-magnet brushless DC electric machine - Google Patents
Refrigerator permanent-magnet brushless DC electric machine Download PDFInfo
- Publication number
- CN108365724A CN108365724A CN201810466754.4A CN201810466754A CN108365724A CN 108365724 A CN108365724 A CN 108365724A CN 201810466754 A CN201810466754 A CN 201810466754A CN 108365724 A CN108365724 A CN 108365724A
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- Prior art keywords
- groove
- casing
- shaft
- electric machine
- rear end
- 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.)
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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
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
-
- 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
- H02K1/14—Stator cores with salient poles
-
- 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
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Include the casing and rear end cap connected through screw the invention discloses a kind of refrigerator permanent-magnet brushless DC electric machine, field frame assembly is equipped in casing, magnetic is equipped in field frame assembly and moulds rotor, magnetic, which is moulded, is equipped with shaft in rotor；Described shaft one end is connected with rear end cap, and the shaft other end is equipped with connection cover, and connection cover is located on the outside of casing；One group of radiating groove is additionally provided in the casing outside wall surface, rear end cap outside wall surface is equipped with one group of anti-slip tank；The field frame assembly includes preceding skeleton, stator core, back skeleton and stator winding, stator core includes polylith stator punching, the stator punching includes stator punching ontology, and 6 teeth portion are uniformly provided on the periphery of stator punching ontology inner circle, tooth socket is equipped between adjacent fingers；The teeth portion includes tooth body and crown, and the flank of tooth of crown is equipped with two groups of groove groups being arranged symmetrically.The present invention has the characteristics that effectively reduce the vibration and noise generated in motor operation course.
Description
Technical field
The present invention relates to a kind of inner-rotor brushless direct current generator, especially a kind of refrigerator permanent-magnet brushless DC electric machine.
Background technology
The motor of refrigerator is typically all brshless DC motor, and brshless DC motor includes mainly motor body and driving
The components such as device reduce magnetic resistance since the stator punching of brshless DC motor all uses tooth slot structure, tooth to be used for guiding the magnetic line of force,
Slot is used for inlaying winding and interlinking with the magnetic line of force in tooth, and tooth magnetic conductivity different from slot makes rotor have quantity in different location
The not equal magnetic line of force, it is ferromagnetic attracting down to rotation (the i.e. tooth socket effect for hindering rotor in the position of the quasi- stator tooth of pole pair
Answer), slot effect increases the starting reactance of motor, also so that motor operation is unstable, can reduce the efficiency of motor；And by
In the presence of " slot effect ", easily make that larger vibration and noise will be generated in the operation process of DC brushless motor, and then influence
The performance of DC brushless motor.Therefore, existing technology is asked there is vibration and noise in motor operation operational process is larger
Topic.
Invention content
The object of the present invention is to provide a kind of refrigerator permanent-magnet brushless DC electric machines.The present invention has and can effectively drop
The characteristics of vibration and noise generated in low motor operation course.
Technical scheme of the present invention：Refrigerator permanent-magnet brushless DC electric machine includes the casing and rear end cap connected through screw,
It is equipped with field frame assembly in casing, magnetic is equipped in field frame assembly and moulds rotor, magnetic, which is moulded, is equipped with shaft in rotor；Described shaft one end is with after
End cap is connected, and the shaft other end is equipped with connection cover, and connection cover is located on the outside of casing；It is additionally provided with one group in the casing outside wall surface
Radiating groove, rear end cap outside wall surface are equipped with one group of anti-slip tank；The field frame assembly include preceding skeleton, stator core, back skeleton and
Stator winding, stator core include polylith stator punching, and the stator punching includes stator punching ontology, in stator punching ontology
It is uniformly provided with 6 teeth portion on round periphery, tooth socket is equipped between adjacent fingers；The teeth portion includes tooth body and crown, crown
The flank of tooth be equipped with two groups of groove groups being arranged symmetrically.
In refrigerator permanent-magnet brushless DC electric machine above-mentioned, the angle between two groups of adjacent groove groups is 15-16 degree；Institute
It includes two grooves being located on the crown flank of tooth to state groove group, and the angle between two adjacent groove center lines is 10 degree.
In refrigerator permanent-magnet brushless DC electric machine above-mentioned, the groove is square structure, and the width of groove is 1.5mm,
The depth of groove is 0.5mm.
In refrigerator permanent-magnet brushless DC electric machine above-mentioned, the flank of tooth of the crown is with the central point of stator punching ontology
Radian for the arcwall face in the center of circle, a diameter of 38-40mm of arcwall face, arcwall face is 53-54 degree.
In refrigerator permanent-magnet brushless DC electric machine above-mentioned, it is equipped with card slot on the inner wall of the rear end cap and casing, blocks
It is equipped with bearing holder (housing, cover) in slot, is equipped with bearing in bearing holder (housing, cover), bearing is matched with shaft；Bearing holder (housing, cover) on casing moulds rotor with magnetic
Between be equipped with taper elastic washer, be located at rear end cap on bearing holder (housing, cover) be equipped with red steel paper washer and circlip for shaft.
In refrigerator permanent-magnet brushless DC electric machine above-mentioned, the rear end cap side is additionally provided with support plate；The casing side
Face is equipped with pressing plate corresponding with support Board position, and pressing plate is equipped with card slot, card is equipped in card slot, and card is equipped with bolt,
Bolt is equipped with nut.
In refrigerator permanent-magnet brushless DC electric machine above-mentioned, the connection cover includes lid, and the middle part on the inside of lid is equipped with
With the matched fixing groove of shaft, fixing groove both ends are additionally provided with multiple first grooves, and the bottom surface of the first inside grooves is equipped with cone
Shape protrusion, lid outside are additionally provided with one group of positioning column, threaded hole corresponding with rotating shaft position are additionally provided in lid；The casing
End face is equipped with the corresponding through-hole of fixed groove location, and through-hole both ends are equipped with the second groove corresponding with the first groove.
In refrigerator permanent-magnet brushless DC electric machine above-mentioned, the second spiral shell corresponding with threaded hole is additionally provided in the shaft
Pit is connected between the threaded hole and the second threaded hole through cross recess depression hexagon-headed bolt, and cross recess depression turret head
Tabletting is additionally provided between bolt and casing.
Compared with prior art, the present invention by the confined space between casing and rear end cap install field frame assembly,
Magnetic moulds rotor and shaft, and so as to reduce the power consumption of single metal-oxide-semiconductor, realization can effectively improve motor work(under same volume
Rate；Stator punching is made of by the way that two groups of groove groups being arranged symmetrically, each groove group are arranged on the crown flank of tooth 2 grooves,
And by strictly controlling the distributing position of groove, quantity, distribution, the shape and size of quantity, shape and size and crown, from
And the Cogging torque of brshless DC motor can be reduced, improve " slot effect ", and then realize and reduce vibration and reduction nothing
The purpose of the noise generated in brushless motor operational process, additionally it is possible to so that motor has good sinusoidal counter electromotive force, greatly
Amplitude promotes the efficiency of motor；By the way that 6 equally distributed first circular arcs are arranged on the periphery of stator punching ontology outer circle
Concave surface can both be such that stator core is accurately, reliable fixed on motor housing, and the setting of the first circular arc concave surface can also be from whole
The intensity of stator punching is improved on body；By the way that the second arc surface is arranged, one can be accurately laminated on convenient for polylith stator punching
It rises.Meanwhile by the way that radiating groove is arranged in casing outside wall surface, it can effectively improve the integral heat sink performance of motor.In conclusion
The present invention has the characteristics that effectively reduce the vibration and noise generated in motor operation course.
In addition, the shape and size by strictly controlling crown, tooth body and tooth socket, close so as to effectively reduce magnetic flux
Degree improves electric efficiency, optimizes motor performance, extends the service life of motor.Moreover, the flank of tooth of crown is with stator punching sheet
The central point of body is the arcwall face in the center of circle, and the stringent diameter for controlling arcwall face is maintained at 38-40mm, and the radian of arcwall face is maintained at
53-54 degree so that best clearance is kept between the crown flank of tooth and the magnetic pole of rotor, so as to change the crown flank of tooth and rotor magnetic
Air-gap reluctance between pole, and then improve " slot effect ", it realizes and reduces vibration and reduce in brshless DC motor operational process
The purpose of the noise of generation.
Moreover, the present invention on the inside of the lid of connection cover by being arranged fixing groove, it is simple in structure for being fixed with shaft,
It is easy to operate, it is connected firmly, by the way that the first groove is arranged at fixing groove both ends, is arranged on casing corresponding with the first groove
Second groove can either effectively improve heat dissipation effect, and interlaced arrangement forms hollow between the first groove and the second groove
Structure, moreover it is possible to play effective sealing function；By the way that tapered protrusion is arranged on the bottom surface of the first groove, tapered protrusion can rise
To the purpose of flow-disturbing, it is convenient for rapid cooling.Positioning column is set on the outside of lid, can be improved between motor and other parts
Coordinate precision.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is the vertical view of the present invention；
Fig. 3 is the partial view of Fig. 2；
Fig. 4 is the structural schematic diagram of stator punching.
Label in attached drawing be：1- casings, 2- rear end caps, 3- field frame assemblies, 4- magnetic mould rotor, 5- shafts, 6- cross recesses
Depression hexagon-headed bolt, 7- connection covers, 8- radiating grooves, 9- card slots, 10- bearing holder (housing, cover)s, 11- bearings, 12- taper elastic washers, 13-
Red steel paper washer, 14- circlip for shaft, 15- pressing plates, 16- bolts, 101- through-holes, the second grooves of 102-, 301- stator punchings
Ontology, 302- teeth portion, 303- tooth sockets, 304- tooth bodies, 305- crowns, 306- grooves, 701- lids, 702- threaded holes, 703- are solid
Determine slot, the first grooves of 704-, 705- tapered protrusions, 706- positioning columns.
Specific implementation mode
The present invention is further illustrated with reference to the accompanying drawings and examples, but be not intended as to the present invention limit according to
According to.
Embodiment.Refrigerator permanent-magnet brushless DC electric machine constitutes as shown in Figures 1 to 4, includes the casing connected through screw
1 and rear end cap 2, field frame assembly 3 is equipped in casing 1, and magnetic is equipped in field frame assembly 3 and moulds rotor 4, magnetic, which is moulded, is equipped with shaft in rotor 4
5；5 one end of the shaft is connected with rear end cap 2, and 5 other end of shaft is equipped with connection cover 7, and connection cover 7 is located at 1 outside of casing；Institute
It states and is additionally provided with one group of radiating groove 8 in 1 outside wall surface of casing, 2 outside wall surface of rear end cap is equipped with one group of anti-slip tank；The field frame assembly 3
Including preceding skeleton, stator core, back skeleton and stator winding, stator core includes polylith stator punching, the stator punching packet
Stator punching ontology 301 is included, 6 teeth portion 302, adjacent fingers 302 are uniformly provided on the periphery of 301 inner circle of stator punching ontology
Between be equipped with tooth socket 303；The teeth portion 302 includes tooth body 304 and crown 305, and the flank of tooth of crown 305 is equipped with two groups of symmetrical cloth
The groove group set.
Angle between two groups of adjacent groove groups is 15-16 degree；The groove group includes two and is located at 305 flank of tooth of crown
On groove 306, and the angle between two adjacent 306 center lines of groove is 10 degree.306 center line of groove refers in groove
Connecting line between heart point and the central point of stator punching ontology.
The groove 306 is square structure, and the width of groove 306 is 1.5mm, and the depth of groove 306 is 0.5mm.
The flank of tooth of the crown 305 be using the central point of stator punching ontology 301 as the arcwall face in the center of circle, arcwall face it is straight
Diameter is 38-40mm, and the radian of arcwall face is 53-54 degree.
It is equipped with card slot 9 on the inner wall of the rear end cap 2 and casing 1, is equipped with bearing holder (housing, cover) 10 in card slot 9, in bearing holder (housing, cover) 10
Equipped with bearing 11, bearing 11 is matched with shaft 5；It is equipped with Conical Projectile between bearing holder (housing, cover) 10 on casing 1 and magnetic modeling rotor 4
Property washer 12, be located at rear end cap 2 on bearing holder (housing, cover) 10 be equipped with red steel paper washer 13 and circlip for shaft 14.
2 side of the rear end cap is additionally provided with support plate；1 side of the casing is equipped with pressing plate corresponding with support Board position
15, pressing plate 15 is equipped with card slot, and card is equipped in card slot, and card is equipped with bolt 16, and bolt 16 is equipped with nut.
The connection cover 7 includes lid 701, the middle part of the inside of lid 701 be equipped with 5 matched fixing groove 703 of shaft,
703 both ends of fixing groove are additionally provided with multiple first grooves 704, and the bottom surface inside the first groove 704 is equipped with tapered protrusion 705, lid
701 outside of body is additionally provided with one group of positioning column 706, and threaded hole corresponding with 5 position of shaft 702 is additionally provided in lid 701；It is described
1 end face of casing is equipped with the corresponding through-hole 101 in 703 position of fixing groove, and 101 both ends of through-hole are equipped with opposite with the first groove 704
The second groove 102 answered.
Second threaded hole corresponding with threaded hole 702, the threaded hole 702 and the second spiral shell are additionally provided in the shaft 5
It is connected through cross recess depression hexagon-headed bolt 6 between pit, and is additionally provided between cross recess depression hexagon-headed bolt 6 and casing 1
Tabletting.
The stator core between preceding skeleton and back skeleton, stator winding be wrapped in stator core, preceding skeleton and after
On skeleton.Polylith stator punching presses together composition stator core.
The installation process of the present invention：First field frame assembly is mounted in casing, then rotor and shaft cooperate simultaneously
It is installed into field frame assembly, is equipped with annular groove in one end of shaft, for coordinating with red steel paper washer and axis elastic washer, turns
The end of axis one end is matched with the bearing on rear end cap, and the shaft other end passes through the connection cover outside bearing and casing on casing
It is mutually fixed, and connection cover is connected with shaft by cross recess depression hexagon-headed bolt and tabletting.By connection cover and refrigerator its
Its component is connected, and located column is coordinated.
Interlaced arrangement forms hollow structure between first groove and the second groove, moreover it is possible to play effective sealing function；It is logical
It crosses on the bottom surface of the first groove and tapered protrusion is set, tapered protrusion can play the purpose of flow-disturbing, be convenient for rapid cooling.
Claims (8)
1. refrigerator permanent-magnet brushless DC electric machine, it is characterised in that：Include the casing (1) connected through screw and rear end cap (2), machine
It is equipped with field frame assembly (3) in shell (1), magnetic modeling rotor (4) is equipped in field frame assembly (3), magnetic, which is moulded, is equipped with shaft (5) in rotor (4)；
Described shaft (5) one end is connected with rear end cap (2), and shaft (5) other end is equipped with connection cover (7), and connection cover (7) is located at casing
(1) outside；One group of radiating groove (8) is additionally provided in casing (1) outside wall surface, rear end cap (2) outside wall surface is anti-skidding equipped with one group
Slot；The field frame assembly (3) includes preceding skeleton, stator core, back skeleton and stator winding, and stator core includes the punching of polylith stator
Piece, the stator punching include stator punching ontology (301), and 6 are uniformly provided on the periphery of stator punching ontology (301) inner circle
A teeth portion (302) is equipped with tooth socket (303) between adjacent fingers (302)；The teeth portion (302) includes tooth body (304) and crown
(305), the flank of tooth of crown (305) is equipped with two groups of groove groups being arranged symmetrically.
2. refrigerator permanent-magnet brushless DC electric machine according to claim 1, it is characterised in that：Two groups of adjacent groove groups it
Between angle be 15-16 degree；The groove group includes two grooves (306) being located on crown (305) flank of tooth, and two is adjacent
Angle between groove (306) center line is 10 degree.
3. refrigerator permanent-magnet brushless DC electric machine according to claim 2, it is characterised in that：The groove (306) is side
The width of shape structure, groove (306) is 1.5mm, and the depth of groove (306) is 0.5mm.
4. refrigerator permanent-magnet brushless DC electric machine according to claim 2, it is characterised in that：The tooth of the crown (305)
Face is a diameter of 38-40mm of arcwall face using the central point of stator punching ontology (301) as the arcwall face in the center of circle, arcwall face
Radian is 53-54 degree.
5. refrigerator permanent-magnet brushless DC electric machine according to claim 1, it is characterised in that：The rear end cap (2) and machine
It is equipped with card slot (9) on the inner wall of shell (1), bearing holder (housing, cover) (10) is equipped in card slot (9), bearing (11) is equipped in bearing holder (housing, cover) (10),
Bearing (11) is matched with shaft (5)；Conical Projectile is equipped between bearing holder (housing, cover) (10) on casing (1) and magnetic modeling rotor (4)
Property washer (12), be located at rear end cap (2) on bearing holder (housing, cover) (10) be equipped with red steel paper washer (13) and circlip for shaft (14).
6. refrigerator permanent-magnet brushless DC electric machine according to claim 1, it is characterised in that：Rear end cap (2) side
It is additionally provided with support plate；Casing (1) side is equipped with pressing plate (15) corresponding with support Board position, and pressing plate (15) is equipped with card
Slot, card slot is interior to be equipped with card, and card is equipped with bolt (16), and bolt (16) is equipped with nut.
7. refrigerator permanent-magnet brushless DC electric machine according to claim 1, it is characterised in that：The connection cover (7) includes
Lid (701), the middle part on the inside of lid (701) is equipped with and shaft (5) matched fixing groove (703), fixing groove (703) both ends
Multiple first grooves (704) are additionally provided with, the internal bottom surface of the first groove (704) is equipped with tapered protrusion (705), lid (701)
Outside is additionally provided with one group of positioning column (706), and threaded hole (702) corresponding with shaft (5) position is additionally provided in lid (701)；
Casing (1) end face is equipped with the corresponding through-hole in fixing groove (703) position (101), and through-hole (101) both ends are equipped with and first
Corresponding second groove (102) of groove (704).
8. refrigerator permanent-magnet brushless DC electric machine according to claim 7, it is characterised in that：It is also set on the shaft (5)
There is the second threaded hole corresponding with threaded hole (702), through cross recess depression between the threaded hole (702) and the second threaded hole
Hexagon-headed bolt (6) is connected, and is additionally provided with tabletting between cross recess depression hexagon-headed bolt (6) and casing (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810466754.4A CN108365724A (en) | 2018-05-16 | 2018-05-16 | Refrigerator permanent-magnet brushless DC electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810466754.4A CN108365724A (en) | 2018-05-16 | 2018-05-16 | Refrigerator permanent-magnet brushless DC electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108365724A true CN108365724A (en) | 2018-08-03 |
Family
ID=63012370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810466754.4A Pending CN108365724A (en) | 2018-05-16 | 2018-05-16 | Refrigerator permanent-magnet brushless DC electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108365724A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4672253A (en) * | 1984-07-25 | 1987-06-09 | Hitachi, Ltd. | Permanent magnet electrical machine with reduced cogging |
| CN2563823Y (en) * | 2002-08-29 | 2003-07-30 | 李金东 | Permanent magnetic DC motor |
| CN102064654A (en) * | 2010-12-16 | 2011-05-18 | 张家港市江南利玛特设备制造有限公司 | Exterior rotor permanent magnet brushless direct current (DC) fan motor for air-conditioning system for ship |
| CN102810965A (en) * | 2012-07-19 | 2012-12-05 | 春城控股集团有限公司 | Brushless permanent magnet direct current motor with windings on sunken skewed slots reserved on crowns of stator and rotor |
| CN103956838A (en) * | 2014-05-21 | 2014-07-30 | 黄石东贝电器股份有限公司 | Stator used in brushless direct current motor and used for reducing fundamental wave cogging torque |
| CN103973007A (en) * | 2013-02-04 | 2014-08-06 | 德昌电机(深圳)有限公司 | Brushless permanent magnet motor |
| CN205509815U (en) * | 2016-04-07 | 2016-08-24 | 温州的可电器有限公司 | Miniature brushless DC motor |
| CN205622461U (en) * | 2016-05-10 | 2016-10-05 | 苏州市润豪电机有限公司 | Device of making an uproar falls in brushless motor |
| DE102015117783A1 (en) * | 2015-10-19 | 2017-04-20 | Hanon Systems | Brushless motor |
| CN206542296U (en) * | 2017-01-19 | 2017-10-03 | 日电产伺服电机（常州）有限公司 | A kind of refrigerator-freezer cools down air blast motor |
| CN207117449U (en) * | 2017-05-02 | 2018-03-16 | 湖州越球电器有限公司 | A kind of 72 serial outer rotor brushless DC motor stator laminating structures |
| CN208272826U (en) * | 2018-05-16 | 2018-12-21 | 湖州越球电机有限公司 | A kind of refrigerator permanent-magnet brushless DC electric machine |
-
2018
- 2018-05-16 CN CN201810466754.4A patent/CN108365724A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4672253A (en) * | 1984-07-25 | 1987-06-09 | Hitachi, Ltd. | Permanent magnet electrical machine with reduced cogging |
| CN2563823Y (en) * | 2002-08-29 | 2003-07-30 | 李金东 | Permanent magnetic DC motor |
| CN102064654A (en) * | 2010-12-16 | 2011-05-18 | 张家港市江南利玛特设备制造有限公司 | Exterior rotor permanent magnet brushless direct current (DC) fan motor for air-conditioning system for ship |
| CN102810965A (en) * | 2012-07-19 | 2012-12-05 | 春城控股集团有限公司 | Brushless permanent magnet direct current motor with windings on sunken skewed slots reserved on crowns of stator and rotor |
| US20140217847A1 (en) * | 2013-02-04 | 2014-08-07 | Johnson Electric S.A. | Brushless permanent magnet motor |
| CN103973007A (en) * | 2013-02-04 | 2014-08-06 | 德昌电机(深圳)有限公司 | Brushless permanent magnet motor |
| CN103956838A (en) * | 2014-05-21 | 2014-07-30 | 黄石东贝电器股份有限公司 | Stator used in brushless direct current motor and used for reducing fundamental wave cogging torque |
| DE102015117783A1 (en) * | 2015-10-19 | 2017-04-20 | Hanon Systems | Brushless motor |
| CN205509815U (en) * | 2016-04-07 | 2016-08-24 | 温州的可电器有限公司 | Miniature brushless DC motor |
| CN205622461U (en) * | 2016-05-10 | 2016-10-05 | 苏州市润豪电机有限公司 | Device of making an uproar falls in brushless motor |
| CN206542296U (en) * | 2017-01-19 | 2017-10-03 | 日电产伺服电机（常州）有限公司 | A kind of refrigerator-freezer cools down air blast motor |
| CN207117449U (en) * | 2017-05-02 | 2018-03-16 | 湖州越球电器有限公司 | A kind of 72 serial outer rotor brushless DC motor stator laminating structures |
| CN208272826U (en) * | 2018-05-16 | 2018-12-21 | 湖州越球电机有限公司 | A kind of refrigerator permanent-magnet brushless DC electric machine |
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