CN109950993A - A kind of high speed rotor of motor field structure - Google Patents
A kind of high speed rotor of motor field structure Download PDFInfo
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- CN109950993A CN109950993A CN201910371644.4A CN201910371644A CN109950993A CN 109950993 A CN109950993 A CN 109950993A CN 201910371644 A CN201910371644 A CN 201910371644A CN 109950993 A CN109950993 A CN 109950993A
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Abstract
The present invention provides a kind of high speed rotor of motor field structures, including cylinder-shaped magnet, several longitudinal joint-cuttings are uniformly provided on cylinder-shaped magnet surface, joint-cutting circumferentially opens up to form arc-shaped joint-cutting along cylinder-shaped magnet longitudinally in each, the 80%-95% of the perimeter of circle where the arc length of arc-shaped joint-cutting accounts for it, several arc-shaped joint-cutting coaxial arrangements, several arc-shaped joint-cuttings misplace arrangement on cylinder-shaped magnet, cylinder-shaped magnet is divided into the multistage magnet structure being connected to each other by several arc-shaped joint-cuttings along axial direction, and the eddy current in adjacent two magnet segment is contrary, it is opposite to generate magnetic field, it cancels out each other.The present invention solves the problems, such as that big, Wen Shenggao is lost in high-speed high-power rotor, reduces rotor eddy-current loss to reduce rotor temperature rise and, so that field structure can be used in high-speed high-power motor, improves the operation stability of motor.
Description
Technical field
The invention belongs to high speed rotor of motor technical fields, more particularly, to a kind of high speed rotor of motor field structure.
Background technique
At this stage, the rotor magnetic pole of high-speed permanent magnetic synchronous motor is mostly generally surface-mount type, and surface-mount type magnetic pole is in high-speed cruising
When due to the magnetic fields by stator armature winding so that a large amount of eddy-current loss of the generation of permanent magnet；And rotor dispersing is enthusiastic
Condition is poor, and the eddy-current loss that permanent magnet generates cannot be effectively dissipated away, causes rotor heat height, temperature rise big, seriously affects
The operational reliability of high-speed motor.
Motor magnet generally blocks eddy current path using the method for segmentation magnetic pole, to reduce eddy-current loss.But by
After magnet piecemeal, need to guarantee that multistage same polarity magnet guarantees position consistency or the certain angle that is staggered along axial, and same pole
Property magnet axial segmentation after, there are repulsive forces between same polarity magnet, cause magnet difficult to install, and the set-up time is long, give magnetic
Body installation brings technologic complexity, needs to guarantee using special tooling that permanent magnet institute is in place when rotor magnet being caused to be installed
It sets.
Moreover, the existing research about permanent magnet machine rotor magnetic pole all concentrate on improve air gap flux density waveform shape and
Improve the inductance of the rectangular axis of motor, not dedicated for the rotor magnetic pole of high-speed motor or the magnetic pole knot of improvement rotor temperature rise
Structure and scheme.
Summary of the invention
In view of this, the present invention is directed to propose a kind of high speed rotor of motor field structure, solves high-speed high-power motor and turns
The problem of son loss is big, Wen Shenggao, reduces rotor eddy-current loss, to reduce rotor temperature rise, so that field structure can be with
For improving the operation stability of motor in high-speed high-power motor.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of high speed rotor of motor field structure, including cylinder-shaped magnet are uniformly provided with several on cylinder-shaped magnet surface
A longitudinal direction joint-cutting, joint-cutting circumferentially opens up to form arc-shaped joint-cutting along cylinder-shaped magnet longitudinally in each, the arc length of arc-shaped joint-cutting
The 80%-95% of the perimeter of circle where accounting for it, several arc-shaped joint-cutting coaxial arrangements, several arc-shaped joint-cuttings are in cylinder-shaped magnet
Cylinder-shaped magnet is divided into the multistage magnet structure being connected to each other, and phase by upper dislocation arrangement, several arc-shaped joint-cuttings along axial direction
Eddy current in adjacent two magnet segments is contrary, generates magnetic field on the contrary, cancelling out each other.
Further, the width of each arc-shaped joint-cutting is respectively less than 0.5mm setting, and the width of each magnet segment is big
It is arranged in 1mm.
Further, cutting into position of the adjacent arc-shaped joint-cutting on cylinder-shaped magnet surface is different, the adjacent circle
Arcuate slit is divided into 0 ° -180 °, preferably 180 ° between the cutting into position angle on cylinder-shaped magnet surface.
Further, the epoxide-resin glue in all arc-shaped joint-cuttings filled with enhancing field structure globality.
Further, the both ends of cylinder-shaped magnet are the end construction of not set arc-shaped joint-cutting, are tied in each end
The lateral joint-cutting for inhibiting end axial eddy is equipped at structure.
Further, the axial length summation of all end constructions of cylinder-shaped magnet is whole no more than cylinder-shaped magnet axial
The 20% of length.
Further, the lateral joint-cutting on each end construction is 1-3, preferably 1.
Compared with the existing technology, a kind of high speed rotor of motor field structure of the present invention has the advantage that
A kind of high speed rotor of motor field structure of the present invention, this field structure different from traditional solid pole
It is longitudinally cutting to be multistage and maintain an entirety.Longitudinally cutting magnetic pole does not finish magnetic pole cutting, and adjacent cut surface is cut
Enter angle difference, to not destroy the overall structure of magnet.
It is vertical to be uniformly provided with several on cylinder-shaped magnet surface for a kind of high speed rotor of motor field structure of the present invention
To joint-cutting, the magnet of rotor is divided into N sections along axial direction, to disconnect distribution of the vortex along axial direction, Ke Yiyou in permanent magnet
The eddy current path of effect cutting magnetic pole, forced vortex by section between connected region flowed between section, to increase the resistance of eddy current path,
Reduce the eddy-current loss and temperature rise of magnetic pole.The invention provide segmentation be connected field structure can be used for high-speed high-power motor or
In person's high efficiency electric, reduce rotor loss, improves system effectiveness and operational reliability.
The feature that the rotor magnetic pole structure has structure simple, easy to process, is applicable to various types of high speeds forever
In magnetic-synchro motor.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is a kind of high when adjacent circular arc shape joint-cutting is divided into 180 ° between the cutting into position angle on cylinder-shaped magnet surface
The schematic perspective view of speed motor rotor magnetic pole structure；
Fig. 2 is a kind of eddy current path schematic diagram of high speed rotor of motor field structure in Fig. 1；
Fig. 3 is a kind of high when adjacent circular arc shape joint-cutting is divided into 150 ° between the cutting into position angle on cylinder-shaped magnet surface
The schematic perspective view of speed motor rotor magnetic pole structure；
Fig. 4 is a kind of eddy current path schematic diagram of high speed rotor of motor field structure in Fig. 3；
Fig. 5 is a kind of schematic perspective view of high speed rotor of motor field structure of end joint-cutting；
Fig. 6 is a kind of end eddy current path schematic diagram of high speed rotor of motor field structure of end joint-cutting.
Description of symbols:
The longitudinal direction 1- joint-cutting, 2- magnet segment, join domain between 3- sections, 4- transverse direction joint-cutting.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in figures 1 and 3, a kind of high speed rotor of motor field structure, including cylinder-shaped magnet, in cylinder-shaped magnet table
Face is uniformly provided with several longitudinal joint-cuttings 1, and joint-cutting 1 circumferentially opens up to form arc-shaped joint-cutting along cylinder-shaped magnet longitudinally in each,
80%-95% of perimeter of circle, too low arc length accounting will lead to vortex abated effect where the arc length of arc-shaped joint-cutting accounts for it
Unobvious, several arc-shaped joint-cuttings coaxial arrangements, several arc-shaped joint-cuttings misplace arrangement on cylinder-shaped magnet, several arc-shaped
Cylinder-shaped magnet is divided into the multistage magnet structure being connected to each other by joint-cutting along axial direction, and the vortex electricity in adjacent two magnet segment 2
Flow contrary, generate magnetic field on the contrary, cancel out each other, between adjacent two magnet segment 2 by section between join domain 3 connect, cutting
The cylinder-shaped magnet of several arc-shaped joint-cuttings still keeps monolith shape.
The width of each arc-shaped joint-cutting is respectively less than 0.5mm setting, is provided with not influencing coercivity and the flux density of permanent magnet
Based on ability, and it is continuous between every section, overall structure is not destroyed, the width of magnet segment is all larger than 1mm setting, too small to will lead to magnetic
Body structural integrity is deteriorated.
Cutting into position of the adjacent arc-shaped joint-cutting on cylinder-shaped magnet surface is different, and partition vortex is along transfers
Path, the adjacent arc-shaped joint-cutting are divided into 0 ° -180 ° between the cutting into position angle on cylinder-shaped magnet surface, preferably
180 °, the adjacent arc-shaped joint-cutting refers to two neighboring arc-shaped cut at the cutting into position angle interval on cylinder-shaped magnet surface
Angle of the radius of circle on radially projecting face where each Self cleavage starting point of seam.
It is 180 ° of interval in Fig. 1, is 150 ° of interval in Fig. 3, the minimum cut angle of adjacent circular arc shape joint-cutting should to justify
Join domain 3 is not communicated between each section of tubular magnet.
Epoxide-resin glue in all arc-shaped joint-cuttings filled with enhancing field structure globality, utilizes adhesive tension
It is further ensured that permanent magnet globality.
Vortex schematic diagram as shown in Figure 2 and Figure 4 can be seen that both cutting modes and guarantee permanent magnet globality
Under the conditions of, increase eddy current path length；And adjacent eddy current is contrary, and the magnetic direction of generation is on the contrary, mutually
It offsets, utmostly reduces the loss of motor.
As shown in figure 5, the both ends of cylinder-shaped magnet are the end construction of not set arc-shaped joint-cutting, tied in each end
The lateral joint-cutting for inhibiting end axial eddy is equipped at structure.The axial length summation of all end constructions of cylinder-shaped magnet is not
Greater than the 20% of cylinder-shaped magnet entirety axial length.Lateral joint-cutting on each end construction is 1-3, due to repeatedly cutting
The internal intensity of permanent magnet, therefore preferably 1 lateral joint-cutting can be injured.
The vortex schematic diagram of permanent magnet end as shown in FIG. 6, which can be seen that, can make permanent magnet end by this structure
Bilge vortex path increases, and increases resistance, reduces loss.
After monolith permanent magnet magnetizes, permanent magnet is radially cut using modes such as wire cuttings, is obtained in the present invention
Field structure.Magnet structure integral strength of the invention is unaffected, and under the action of the centrifugal, structural strength performance does not change.
This rotor magnetic pole structure is relative to the magnetic pole of other transversal slotting structures or the magnetic pole of perforation structure, in working principle
On deposit essence difference: firstly, the present invention be using radially not exclusively cutting, remain the radial direction of permanent magnet
Integrality；Secondly, changing the path of permanent magnet internal vortex by the radial cuts of different angle, increasing path, subtract
Small vortex；This is different from existing structure, changes the path of vortex flow, and the vortex adjacent segment after change by cutting mode
It is vortexed contrary, the magnetic field of generation is cancelled out each other, can the smaller influence for reducing vortex；And existing minishing method is all adopted
With the methods of axial segmentation, radial blocking, present invention effect achieved is not reached.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of high speed rotor of motor field structure, it is characterised in that: uniform on cylinder-shaped magnet surface including cylinder-shaped magnet
Several longitudinal joint-cuttings are provided with, joint-cutting circumferentially opens up to form arc-shaped joint-cutting along cylinder-shaped magnet longitudinally in each, arc-shaped to cut
The 80%-95% of the perimeter of circle where the arc length of seam accounts for it, several arc-shaped joint-cutting coaxial arrangements, several arc-shaped joint-cuttings are in circle
Misplace arrangement on tubular magnet, and cylinder-shaped magnet is divided into the multistage magnet knot being connected to each other by several arc-shaped joint-cuttings along axial direction
Structure, and the eddy current in adjacent two magnet segment is contrary, generates magnetic field on the contrary, cancelling out each other.
2. a kind of high speed rotor of motor field structure according to claim 1, it is characterised in that: each described arc-shaped to cut
The width of seam is respectively less than 0.5mm setting, and the width of each magnet segment is all larger than 1mm setting.
3. a kind of high speed rotor of motor field structure according to claim 1, it is characterised in that: adjacent described arc-shaped to cut
The cutting into position for being sewn on cylinder-shaped magnet surface is different, cutting into position of the adjacent arc-shaped joint-cutting on cylinder-shaped magnet surface
0 ° -180 °, preferably 180 ° are divided between angle.
4. a kind of high speed rotor of motor field structure according to any one of claim 1-3, it is characterised in that: all
Arc-shaped joint-cutting in filled with enhancing field structure globality epoxide-resin glue.
5. a kind of high speed rotor of motor field structure according to any one of claim 4, it is characterised in that: cylindric magnetic
The both ends of body are the end construction of not set arc-shaped joint-cutting, are equipped at each end construction and inhibit end axial eddy
Lateral joint-cutting.
6. a kind of high speed rotor of motor field structure according to claim 5, it is characterised in that: cylinder-shaped magnet owns
The axial length summation of end construction is not more than the 20% of cylinder-shaped magnet entirety axial length.
7. a kind of high speed rotor of motor field structure according to claim 5, it is characterised in that: on each end construction
Lateral joint-cutting is 1-3, preferably 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910371644.4A CN109950993B (en) | 2019-05-06 | 2019-05-06 | High-speed motor rotor magnetic pole structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910371644.4A CN109950993B (en) | 2019-05-06 | 2019-05-06 | High-speed motor rotor magnetic pole structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109950993A true CN109950993A (en) | 2019-06-28 |
| CN109950993B CN109950993B (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910371644.4A Active CN109950993B (en) | 2019-05-06 | 2019-05-06 | High-speed motor rotor magnetic pole structure |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0993895A (en) * | 1995-09-26 | 1997-04-04 | Toshiba Corp | Brushless motor |
| EP1065777A1 (en) * | 1999-06-30 | 2001-01-03 | Shin-Etsu Chemical Co., Ltd. | Rare earth-based sintered magnet and permanent magnet synchronous motor therewith |
| CN101110289A (en) * | 2005-07-22 | 2008-01-23 | 信越化学工业株式会社 | Rare earth permanent magnet, its manufacturing method, and permanent magnet rotary machine |
| CN101316058A (en) * | 2008-06-04 | 2008-12-03 | 哈尔滨理工大学 | Rotor protection sleeve of high speed permanent magnet motor |
| CN204761186U (en) * | 2015-05-21 | 2015-11-11 | 浙江大学 | High -speed permanent -magnet machine's of table formula of pasting rotor structure |
| CN105896773A (en) * | 2016-05-27 | 2016-08-24 | 天津大学 | Slot-type permanent magnet, axial flux permanent magnet motor rotor and radial flux permanent magnet motor rotor |
| CN208077715U (en) * | 2018-02-06 | 2018-11-09 | 上海辰光医疗科技股份有限公司 | Reduce magnet structure of the vortex to gradient fields |
-
2019
- 2019-05-06 CN CN201910371644.4A patent/CN109950993B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0993895A (en) * | 1995-09-26 | 1997-04-04 | Toshiba Corp | Brushless motor |
| EP1065777A1 (en) * | 1999-06-30 | 2001-01-03 | Shin-Etsu Chemical Co., Ltd. | Rare earth-based sintered magnet and permanent magnet synchronous motor therewith |
| CN101110289A (en) * | 2005-07-22 | 2008-01-23 | 信越化学工业株式会社 | Rare earth permanent magnet, its manufacturing method, and permanent magnet rotary machine |
| CN101316058A (en) * | 2008-06-04 | 2008-12-03 | 哈尔滨理工大学 | Rotor protection sleeve of high speed permanent magnet motor |
| CN204761186U (en) * | 2015-05-21 | 2015-11-11 | 浙江大学 | High -speed permanent -magnet machine's of table formula of pasting rotor structure |
| CN105896773A (en) * | 2016-05-27 | 2016-08-24 | 天津大学 | Slot-type permanent magnet, axial flux permanent magnet motor rotor and radial flux permanent magnet motor rotor |
| CN208077715U (en) * | 2018-02-06 | 2018-11-09 | 上海辰光医疗科技股份有限公司 | Reduce magnet structure of the vortex to gradient fields |
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| CN109950993B (en) | 2020-12-11 |
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