CN105024513A - Rotor of permanent magnet brushless DC motor - Google Patents
Rotor of permanent magnet brushless DC motor Download PDFInfo
- Publication number
- CN105024513A CN105024513A CN201510410779.9A CN201510410779A CN105024513A CN 105024513 A CN105024513 A CN 105024513A CN 201510410779 A CN201510410779 A CN 201510410779A CN 105024513 A CN105024513 A CN 105024513A
- Authority
- CN
- China
- Prior art keywords
- rotor
- magnet steel
- motor
- rotor punching
- magnet
- 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
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention relates to a rotor of a permanent magnet brushless DC motor, and includes a rotating shaft (1), a rotor punching sheet group (2) and magnetic steel (3). The rotating shaft (1) has knurls, the rotor punching sheet group (2) adopts integrally slotless punching sheets, the rotor punching sheet group (2) is pressed in the rotating shaft (1) and is limited in position by the knurls, the magnetic steel (3) is of an annular integral structure and is made of sintered Nd-Fe-B material, a gap exists between the rotor punching sheet group (2) and the magnetic steel (3) and is filled with glue, so that the magnetic steel (3) is bonded to an outer side of the rotor punching sheet (2), integral magnetizing and radial inclined magnetizing are performed on the magnetic steel (3), and the magnetic steel (3) after magnetizing has eight poles in total and N poles and S poles are alternately arranged. The rotor is simple in structure, assembling without magnetism can be realized, assembling technology is simple, manpower is saved, and production efficiency is substantially improved; power density is high, and the overall size of a motor can be reduced; and since radial inclined magnetizing is adopted, skewed poles of the rotor can be realized, thereby reducing cogging torque and torque pulsation of the motor.
Description
Technical field
The invention belongs to technical field of motors, relate to a kind of rotor of motor, particularly relate to a kind of rotor of non-brush permanent-magnet DC motor.
Background technology
Non-brush permanent-magnet DC motor right and wrong a kind of motor usually.But rotor structure all more complicated of existing most of non-brush permanent-magnet DC motor, the many employings of rotor punching group have groove punching, and magnetic block magnet steel embeds in rotor punching group.The rotor punching group also had is oat tail groove structure, and tile-type magnet steel is inserted in dovetail groove.These designs cause rotor punching processing difficulties, and cost is very high, and magnet steel is block or tile, magnet steel band magnetic during assembling, assembling process difficulty.And the rotor magnetic steel of existing non-brush permanent-magnet DC motor does not generally adopt oblique magnetizing, cause like this cogging torque of motor and torque pulsation bigger than normal.
On the whole, the rotor of existing non-brush permanent-magnet DC motor generally has following shortcoming: 1, complex rotor structure, and rotor punching group difficulty of processing is high.2, the Distribution of Magnetic Field uniformity, symmetry are bad, and cogging torque and the torque pulsation of motor are bigger than normal.3, power density is low, is unfavorable for reducing whole motor volume.4, assembling difficulty, loses time and manually.
In view of the above-mentioned technological deficiency of prior art, in the urgent need to developing a kind of rotor of non-brush permanent-magnet DC motor of Novel structure.
Summary of the invention
The object of the invention is to overcome the shortcoming existed in prior art, provide a kind of rotor of non-brush permanent-magnet DC motor, this rotor overall structure is simple, can realize not being with magnetic to assemble, and assembly technology is simple, and save artificial, production efficiency increases substantially; Meanwhile, power density is high, can reduce whole motor size; In rotor, magnet steel adopts radial direction tiltedly to magnetize, and realizes skewed-rotor, reduces cogging torque and the torque pulsation of motor.
To achieve these goals, the invention provides following technical scheme: a kind of rotor of non-brush permanent-magnet DC motor, it comprises rotating shaft, rotor punching group and magnet steel, it is characterized in that, described rotating shaft is with annular knurl, described rotor punching group adopts overall slotless punching, described rotor punching group is pressed in described rotating shaft also spacing by described annular knurl, described magnet steel is doughnut-shaped monolithic structure and adopts sintered neodymium iron boron material to make, gap is there is and the outside making described magnet steel be bonded in described rotor punching group is filled up in described gap by glue between described rotor punching group and described magnet steel, described magnet steel carries out entirety and magnetizes and magnetize as radial direction tiltedly magnetizes after the outside being bonded in described rotor punching group, after magnetizing, described magnet steel has 8 poles and adopts N pole and S pole alternant.
Further, wherein, what described radial direction tiltedly magnetized magnetize, and angle is 83 degree.
Further, wherein, the external diameter of described magnet steel is 39mm, and length is 44mm.
Again further, wherein, the external diameter of described doughnut-shaped monolithic magnet steel and the axiality of described rotating shaft is ensured by cemented in place frock.
Compared with the rotor of existing non-brush permanent-magnet DC motor, the rotor of non-brush permanent-magnet DC motor of the present invention has following Advantageous Effects:
1, Stability Analysis of Structures, reliability is high.
2, power density is high, can reduce whole motor size.
3, Distribution of Magnetic Field is even, and symmetry is good.
4, can realize not being with magnetic to assemble, assembly technology is simple, and production efficiency is high.
5, adopt special obliquely to magnetize, the oblique pole of model rotor, significantly reduces cogging torque and the torque pulsation of motor.
6, rotor structure is simple.
Accompanying drawing explanation
Fig. 1 is the axonometric drawing of the rotor of non-brush permanent-magnet DC motor of the present invention.
Fig. 2 is the end-view of the rotor of non-brush permanent-magnet DC motor of the present invention.
Fig. 3 is longitudinal cross-sectional schematic of the rotor of non-brush permanent-magnet DC motor of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described, and the content of embodiment is not as the restriction to protection scope of the present invention.
As Figure 1-3, identical with the rotor of existing non-brush permanent-magnet DC motor, non-brush permanent-magnet DC motor of the present invention comprises rotating shaft 1, rotor punching group 2 and magnet steel 3.
Different from the rotor of existing non-brush permanent-magnet DC motor, in the present invention, described rotating shaft 1 is with annular knurl.Described rotor punching group 2 adopts overall slotless punching.Described rotor punching group 2 is pressed in described rotating shaft 1 also spacing by described annular knurl.Owing to adopting slotless punching and being undertaken spacing by annular knurl, therefore, its Stability Analysis of Structures, reliability is high, and mounting process is simple.Meanwhile, overall slotless punching processing is simple, and difficulty of processing is little, and makes the structure of rotor simpler.
In addition, described magnet steel 3 is doughnut-shaped monolithic structure.Minim gap is there is between described rotor punching group 2 and described magnet steel 3.When assembling described magnet steel 3, described gap being filled up by glue thus makes described magnet steel 3 be bonded in the outside of described rotor punching group 2.In bonding process, ensure the external diameter of doughnut-shaped monolithic magnet steel and the axiality of rotating shaft 1 by cemented in place frock.Meanwhile, axiality adjusts by viscose glue amount, reduces the difficulty of processing of magnet steel.
In the present invention, be bonded in the process in described rotor punching group by described doughnut-shaped monolithic magnet steel, described magnet steel is not with magnetic, realizes not being with magnetic assemble, and assembly technology is simple, save time with manually.
Described magnet steel 3 carries out entirety and magnetizes after the outside being bonded in described rotor punching group 2.In the present invention, magnetize and to magnetize for oblique, the angle that magnetizes is 83 degree.Magnetized by oblique, can simulated implementation skewed-rotor, like this, such that the Distribution of Magnetic Field of rotor is even, symmetry good, significantly can reduce cogging torque and the torque pulsation of motor.
Further, after magnetizing, described magnet steel 3 has 8 poles and adopts N pole and S pole alternant, and magnetic pole gap is little, and adopts sintered neodymium iron boron material.Like this, make the power density of described magnet steel 3 high, reduce rotor size greatly, and then reduce the overall dimensions of motor.
In the present invention, preferably, the external diameter of described magnet steel 3 is 39mm, and length is 44mm.The sintered neodymium iron boron material magnet steel of this size, such that the symmetry of this rotor is good, Stability Analysis of Structures, reliability are high.
The above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here cannot give exhaustive to all execution modes.Every belong to technical scheme of the present invention the apparent change of extending out or variation be still in the row of protection scope of the present invention.
Claims (4)
1. the rotor of a non-brush permanent-magnet DC motor, it comprises rotating shaft (1), rotor punching group (2) and magnet steel (3), it is characterized in that, described rotating shaft (1) is with annular knurl, described rotor punching group (2) adopts overall slotless punching, described rotor punching group (2) is pressed into described rotating shaft (1) and goes up and lean on described annular knurl spacing, described magnet steel (3) for doughnut-shaped monolithic structure and adopt sintered neodymium iron boron material make, gap is there is and the outside making described magnet steel (3) be bonded in described rotor punching group (2) is filled up in described gap by glue between described rotor punching group (2) and described magnet steel (3), described magnet steel (3) carries out entirety and magnetizes and magnetize as radial direction tiltedly magnetizes after the outside being bonded in described rotor punching group (2), after magnetizing, described magnet steel (3) has 8 poles and adopts N pole and S pole alternant.
2. the rotor of non-brush permanent-magnet DC motor according to claim 1, is characterized in that, what described radial direction tiltedly magnetized magnetize, and angle is 83 degree.
3. the rotor of the non-brush permanent-magnet DC motor according to claim 1 and 2, is characterized in that, the external diameter of described magnet steel (3) is 39mm, and length is 44mm.
4. the rotor of the non-brush permanent-magnet DC motor according to claim 1-3, is characterized in that, ensures the external diameter of described doughnut-shaped monolithic magnet steel (3) and the axiality of described rotating shaft (1) by cemented in place frock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510410779.9A CN105024513A (en) | 2015-07-14 | 2015-07-14 | Rotor of permanent magnet brushless DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510410779.9A CN105024513A (en) | 2015-07-14 | 2015-07-14 | Rotor of permanent magnet brushless DC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105024513A true CN105024513A (en) | 2015-11-04 |
Family
ID=54414291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510410779.9A Pending CN105024513A (en) | 2015-07-14 | 2015-07-14 | Rotor of permanent magnet brushless DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105024513A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105391209A (en) * | 2015-12-21 | 2016-03-09 | 南车株洲电机有限公司 | Rotor structure of permanent magnet motor and installation method of rotor structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0655824A2 (en) * | 1993-11-30 | 1995-05-31 | SANYO ELECTRIC Co., Ltd. | Outer rotor type brushless DC motor |
| CN201781343U (en) * | 2010-08-20 | 2011-03-30 | 德昌电机(深圳)有限公司 | Brushless motor and fan using same |
| CN102545424A (en) * | 2010-12-30 | 2012-07-04 | 深圳市英威腾电气股份有限公司 | Rotor structure of alternating current servo motor |
| CN103618410A (en) * | 2013-12-12 | 2014-03-05 | 北京北机机电工业有限责任公司 | Generator system |
-
2015
- 2015-07-14 CN CN201510410779.9A patent/CN105024513A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0655824A2 (en) * | 1993-11-30 | 1995-05-31 | SANYO ELECTRIC Co., Ltd. | Outer rotor type brushless DC motor |
| CN201781343U (en) * | 2010-08-20 | 2011-03-30 | 德昌电机(深圳)有限公司 | Brushless motor and fan using same |
| CN102545424A (en) * | 2010-12-30 | 2012-07-04 | 深圳市英威腾电气股份有限公司 | Rotor structure of alternating current servo motor |
| CN103618410A (en) * | 2013-12-12 | 2014-03-05 | 北京北机机电工业有限责任公司 | Generator system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105391209A (en) * | 2015-12-21 | 2016-03-09 | 南车株洲电机有限公司 | Rotor structure of permanent magnet motor and installation method of rotor structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202524184U (en) | Permanent magnetic motor and bladeless fan applying the same | |
| CN101330231A (en) | Permanent magnet motor stator and rotor for compressor | |
| CN102570654B (en) | Rotor and motor | |
| EP2592721A3 (en) | Permanent magnet electrical rotating machine, wind power generating system, and a method of magnetizing a permanent magnet | |
| CN102377264B (en) | Rotor structure of permanent magnet synchronous motor and permanent magnet synchronous motor | |
| CN105048671A (en) | Asymmetric V-shaped rotor punching sheet and built-in permanent-magnetic motor using the same | |
| EP2458711A3 (en) | Magnet embedded rotor, electric motor, and assembly method of electric motor | |
| CN204168098U (en) | Permanent-magnetic synchronous motor rotor | |
| CN109217513B (en) | Motor rotor, motor, compressor and heat pump system | |
| CN202364011U (en) | Servo motor with halbach structure | |
| CN104167844B (en) | Mixed asymmetric permanent magnet rotor | |
| CN105324917B (en) | Use the electric rotating machine of permanent magnet | |
| CN202218079U (en) | Permanent magnet synchronous motor rotor structure for compressor | |
| CN106357028A (en) | Permanent magnet synchronous motor rotor and permanent magnet synchronous motor | |
| CN206077099U (en) | Motor and its rotor structure | |
| CN102545433A (en) | Tangential rotor for rotating motor | |
| CN105790462B (en) | The magnetic element structure and fan motor device of rotor | |
| CN202586540U (en) | Permanent magnet motor rotor and permanent magnet motor thereof | |
| CN202374066U (en) | Rotor structure for permanent magnet synchronous motor and permanent magnet synchronous motor | |
| CN105024513A (en) | Rotor of permanent magnet brushless DC motor | |
| CN206517180U (en) | A kind of permanent-magnetic synchronous motor rotor and permagnetic synchronous motor | |
| CN201994743U (en) | Rotor structure of permanent magnet motor | |
| CN210724362U (en) | Permanent magnet synchronous motor for compressor and rotor assembly thereof | |
| CN102570663A (en) | Hybrid rotor of rotary motor | |
| CN210016340U (en) | Rotor for mixed magnetic motor and mixed magnetic motor thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151104 |
|
| WD01 | Invention patent application deemed withdrawn after publication |